AI Trajectory

null

{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch modifies `drivers/ptp/ptp_fc3.c`, which is a platform driver matching the name `rc38xxx-phc`. However, there is no code in the kernel (e.g., in `drivers/mfd/rsmu_core.c` or any other MFD driver) that instantiates a platform device with this name, nor are there any device tree nodes with a matching compatible string. Since the device is never created, the driver's probe function (`idtfc3_probe`) and the modified code (`idtfc3_enable_ptp`) are completely unreachable in any environment, including syzkaller.",
  "WorthFuzzing": false
}

null

{
  "PatchDiff": "commit be8e0980634f8ef2b20d4172fec8806294213752\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate:   Mon Aug 3 19:32:46 2026 +0000\n\n    syz-cluster: applied patch under review\n\ndiff --git a/drivers/ptp/ptp_fc3.c b/drivers/ptp/ptp_fc3.c\nindex f0e000428a3f4..02b973995d7c1 100644\n--- a/drivers/ptp/ptp_fc3.c\n+++ b/drivers/ptp/ptp_fc3.c\n@@ -665,8 +665,6 @@ static int idtfc3_init_timecounter(struct idtfc3 *idtfc3)\n \tif (err)\n \t\treturn err;\n \n-\tptp_schedule_worker(idtfc3-\u003eptp_clock, idtfc3-\u003etc_update_period);\n-\n \treturn 0;\n }\n \n@@ -825,6 +823,14 @@ static int idtfc3_enable_ptp(struct idtfc3 *idtfc3)\n \n \tidtfc3-\u003ecaps = idtfc3_caps;\n \tsnprintf(idtfc3-\u003ecaps.name, sizeof(idtfc3-\u003ecaps.name), \"IDT FC3W\");\n+\terr = idtfc3_set_overhead(idtfc3);\n+\tif (err)\n+\t\treturn err;\n+\n+\terr = idtfc3_init_timecounter(idtfc3);\n+\tif (err)\n+\t\treturn err;\n+\n \tidtfc3-\u003eptp_clock = ptp_clock_register(\u0026idtfc3-\u003ecaps, NULL);\n \n \tif (IS_ERR(idtfc3-\u003eptp_clock)) {\n@@ -833,13 +839,7 @@ static int idtfc3_enable_ptp(struct idtfc3 *idtfc3)\n \t\treturn err;\n \t}\n \n-\terr = idtfc3_set_overhead(idtfc3);\n-\tif (err)\n-\t\treturn err;\n-\n-\terr = idtfc3_init_timecounter(idtfc3);\n-\tif (err)\n-\t\treturn err;\n+\tptp_schedule_worker(idtfc3-\u003eptp_clock, idtfc3-\u003etc_update_period);\n \n \tdev_info(idtfc3-\u003edev, \"TIME_SYNC_CHANNEL registered as ptp%d\",\n \t\t idtfc3-\u003eptp_clock-\u003eindex);\n"
}

best-expensive

null

{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch modifies `drivers/ptp/ptp_fc3.c`, which is a platform driver matching the name `rc38xxx-phc`. However, there is no code in the kernel (e.g., in `drivers/mfd/rsmu_core.c` or any other MFD driver) that instantiates a platform device with this name, nor are there any device tree nodes with a matching compatible string. Since the device is never created, the driver's probe function (`idtfc3_probe`) and the modified code (`idtfc3_enable_ptp`) are completely unreachable in any environment, including syzkaller.",
  "WorthFuzzing": false
}

You are an expert Linux kernel maintainer.
Your job is to review a provided patch series and determine
if it makes functional changes to the kernel that should be fuzzed.

IMPORTANT: The changes have ALREADY been applied and committed as the HEAD commit in
your workspace. Do NOT rely on your internal knowledge of the kernel. You must actively
use your code access tools to examine the actual source code and confirm any assumptions.

Return WorthFuzzing=false if the patch only contains:
- Modifications to Documentation/, Kconfig files, or code comments.
- Purely decorative changes, such as logging (e.g., pr_err, printk) or tracepoints.
- Changes to numeric constants or macros that do not functionally alter execution flow.
- Code paths that are impossible to reach in virtualized environments like GCE or QEMU,
  even when utilizing software-emulated hardware (e.g., usb gadget, mac80211_hwsim).
- Code in vendor-specific PCIe switch, SmartNIC, or GPU drivers (e.g., mlxsw, pds_core, qed,
  ionic, amdgpu) that require physical PCIe hardware cards not emulated in standard QEMU.
- Driver .remove, .shutdown, or pci_unregister_driver teardown callbacks (e.g., igb_remove)
  that are executed only during PCI hot-unplug or sysfs driver unbind operations.

If it modifies reachable core kernel logic, drivers, or architectures, use your code search
tools to verify the code can be executed, then return WorthFuzzing=true.

When returning WorthFuzzing=true, you MUST ALSO:
1. Extract any specific kernel functions that should be heavily fuzzed into FocusSymbols.
   Avoid listing generic hot-path functions to prevent skewed test distributions.
   Prefer non-static, non-inlined API entrypoint functions over internal static helper functions
   (which are inlined by the compiler and do not have distinct symbol addresses).
2. Identify any specific CONFIG_ options required to properly test this new/modified feature.
   Go and look into the Kconfig files and check for ifdefs around the code, do not make assumptions.
   Also check "depends on" lines in Kconfig to include any non-standard parent subsystem configs
   needed for Kbuild to compile the code statically into vmlinux. List them in the EnableConfigs
   output array, and DO NOT add a 'CONFIG_' prefix (e.g., return "NET_IPV4" instead of "CONFIG_NET_IPV4").
Prefer calling several tools at the same time to save round-trips.


Use set-results tool to provide results of the analysis.
It must be called exactly once before the final reply.
Ignore results of this tool.

For your convenience, here is the diff of the changes:
commit be8e0980634f8ef2b20d4172fec8806294213752
Author: syz-cluster <triage@syzkaller.com>
Date:   Mon Aug 3 19:32:46 2026 +0000

    syz-cluster: applied patch under review

diff --git a/drivers/ptp/ptp_fc3.c b/drivers/ptp/ptp_fc3.c
index f0e000428a3f4..02b973995d7c1 100644
--- a/drivers/ptp/ptp_fc3.c
+++ b/drivers/ptp/ptp_fc3.c
@@ -665,8 +665,6 @@ static int idtfc3_init_timecounter(struct idtfc3 *idtfc3)
 	if (err)
 		return err;
 
-	ptp_schedule_worker(idtfc3->ptp_clock, idtfc3->tc_update_period);
-
 	return 0;
 }
 
@@ -825,6 +823,14 @@ static int idtfc3_enable_ptp(struct idtfc3 *idtfc3)
 
 	idtfc3->caps = idtfc3_caps;
 	snprintf(idtfc3->caps.name, sizeof(idtfc3->caps.name), "IDT FC3W");
+	err = idtfc3_set_overhead(idtfc3);
+	if (err)
+		return err;
+
+	err = idtfc3_init_timecounter(idtfc3);
+	if (err)
+		return err;
+
 	idtfc3->ptp_clock = ptp_clock_register(&idtfc3->caps, NULL);
 
 	if (IS_ERR(idtfc3->ptp_clock)) {
@@ -833,13 +839,7 @@ static int idtfc3_enable_ptp(struct idtfc3 *idtfc3)
 		return err;
 	}
 
-	err = idtfc3_set_overhead(idtfc3);
-	if (err)
-		return err;
-
-	err = idtfc3_init_timecounter(idtfc3);
-	if (err)
-		return err;
+	ptp_schedule_worker(idtfc3->ptp_clock, idtfc3->tc_update_period);
 
 	dev_info(idtfc3->dev, "TIME_SYNC_CHANNEL registered as ptp%d",
 		 idtfc3->ptp_clock->index);

gemini-3.1-pro-preview

null

null

							input: 2430
							output: 37
							thoughts: 139
						

**Analyzing the PTP Driver Patch**

Okay, so this patch is touching `drivers/ptp/ptp_fc3.c`. My initial thought is to quickly grasp the scope of the change. It seems we're primarily dealing with the scheduling and initialization sequence of the Precision Time Protocol (PTP) functionality within that driver. Specifically, it appears the `ptp_schedule_worker` function is being moved out of `idtfc3_init_timecounter` and into `idtfc3_enable_ptp`, but only *after* the `ptp_clock_register` call. We also see `idtfc3_set_overhead` and `idtfc3_init_timecounter` being shifted to *before* `ptp_clock_register`.

Now, before I dive too deep, I need a clearer picture. What exactly is `ptp_fc3.c`? My immediate impulse is to understand the underlying hardware this driver interfaces with. Is it an I2C or SPI device? Or is this a PCI-based implementation? Is it perhaps something entirely different, something I'm less familiar with? That detail dictates so much of the overall architecture and how these changes will ripple through the system. I have to understand the hardware interaction to understand the rationale for this rearrangement.

{
  "Expression": "idtfc3_probe",
  "PathPrefix": "drivers/ptp/ptp_fc3.c"
}

{
  "Output": "drivers/ptp/ptp_fc3.c=931=static int idtfc3_check_device_compatibility(struct idtfc3 *idtfc3)\n--\ndrivers/ptp/ptp_fc3.c-947-\ndrivers/ptp/ptp_fc3.c:948:static int idtfc3_probe(struct platform_device *pdev)\ndrivers/ptp/ptp_fc3.c-949-{\n--\ndrivers/ptp/ptp_fc3.c=1002=static struct platform_driver idtfc3_driver = {\n--\ndrivers/ptp/ptp_fc3.c-1005-\t},\ndrivers/ptp/ptp_fc3.c:1006:\t.probe = idtfc3_probe,\ndrivers/ptp/ptp_fc3.c-1007-\t.remove = idtfc3_remove,\n"
}

gemini-3.1-pro-preview

null

null

							input: 3124
							output: 37
							thoughts: 34
						

Okay, here's my take on those thoughts, framed as a first-person summary, keeping in mind my own expertise:

**Diving into the Driver Instantiation**

Right, so this is a platform driver we're looking at. My immediate concern is understanding *how* it's being brought into existence. Given that it's a platform driver, I need to figure out the instantiation method. Is it being wired up via the device tree? That's the most common route, of course, and typically the first place I'd look. Or, is it relying on ACPI? That would change the game completely, with a different set of considerations for resource management and platform enumeration. Could there be some other, less common mechanism at play? Perhaps a custom board bring-up sequence or a bootloader-driven configuration? I'll need to dig through the code and surrounding documentation to pinpoint the exact method. Understanding this is absolutely critical for debugging any initialization issues or platform-specific dependencies down the line. It sets the stage for everything else.

{
  "Expression": "idtfc3_driver",
  "PathPrefix": "drivers/ptp/ptp_fc3.c"
}

{
  "Output": "drivers/ptp/ptp_fc3.c=995=static void idtfc3_remove(struct platform_device *pdev)\n--\ndrivers/ptp/ptp_fc3.c-1001-\ndrivers/ptp/ptp_fc3.c:1002:static struct platform_driver idtfc3_driver = {\ndrivers/ptp/ptp_fc3.c-1003-\t.driver = {\n--\ndrivers/ptp/ptp_fc3.c-1009-\ndrivers/ptp/ptp_fc3.c:1010:module_platform_driver(idtfc3_driver);\n"
}

gemini-3.1-pro-preview

null

null

							input: 3590
							output: 43
							thoughts: 8
						

Okay, let's dive into this. Here's my take on those thoughts, as if they're my own:

**Analyzing the Driver Structure**

Alright, time to get my hands dirty. My initial instinct is to go straight to the `driver` struct. That's usually the heart of how these systems tick. Knowing the structure will tell me about the data it holds and how it relates to everything else. What fields are there? What's the organization? Is it a flat structure, or is it composed of nested structs? Understanding this core data layout is critical. It sets the stage for everything else. I'm looking for clues about the driver's purpose, its connection to the hardware, and how it handles different operations. Let's see how they've organized this and what secrets it holds.

{
  "Expression": "static struct platform_driver idtfc3_driver",
  "PathPrefix": "drivers/ptp/ptp_fc3.c"
}

{
  "Output": "drivers/ptp/ptp_fc3.c=995=static void idtfc3_remove(struct platform_device *pdev)\n--\ndrivers/ptp/ptp_fc3.c-1001-\ndrivers/ptp/ptp_fc3.c:1002:static struct platform_driver idtfc3_driver = {\ndrivers/ptp/ptp_fc3.c-1003-\t.driver = {\n"
}

gemini-3.1-pro-preview

null

null

							input: 3937
							output: 41
							thoughts: 8
						

Okay, here's my interpretation of that thought process, tailored for an expert audience, and written in the first person:

**Initial Assessment: Diving into the `driver` struct**

Alright, time to get to it. My initial thought process is to familiarize myself with the `driver` struct. This isn't just a casual glance; I need to understand its core purpose, its fields, and, most importantly, how it's designed to interact with the broader system architecture. Is it a central point for managing hardware interaction? Does it abstract hardware-specific details, or is it more of a lower-level wrapper? Are there any obvious design patterns at play, perhaps a strategy or factory pattern to handle different driver implementations? I'm already anticipating questions related to concurrency, resource management, and error handling within this structure. I need to be ready to analyze how the struct defines, limits, and facilitates operations.

{
  "File": "drivers/ptp/ptp_fc3.c",
  "FirstLine": 1000,
  "LineCount": 20
}

{
  "Contents": "1000:\t}\n1001:\t\n1002:\tstatic struct platform_driver idtfc3_driver = {\n1003:\t\t.driver = {\n1004:\t\t\t.name = \"rc38xxx-phc\",\n1005:\t\t},\n1006:\t\t.probe = idtfc3_probe,\n1007:\t\t.remove = idtfc3_remove,\n1008:\t};\n1009:\t\n1010:\tmodule_platform_driver(idtfc3_driver);\n"
}

gemini-3.1-pro-preview

null

null

							input: 4329
							output: 27
							thoughts: 27
						

Okay, here's my interpretation of those thoughts, tailored for an expert audience, presented in the first person:

**Initial Assessment: Platform Device Matching**

Alright, the system has flagged this device, specifically "rc38xxx-phc," by its name. My immediate thought is, "Okay, the system found a match based on the device name." That's the first step in debugging. But it's not enough information on its own. Now I need to consider potential driver interactions.
My next question is: Is there any *other* driver that also creates this particular platform device?
Knowing that, I'll need to double check the kernel configuration and device tree to determine if another module is configured to instantiate it. Perhaps there's a conflict or unexpected behavior happening between them. I'll need to dig deeper into the instantiation code and potential resource overlaps. I need to figure out which of the potential matching drivers is actually responsible for creating this device.

{
  "Expression": "rc38xxx-phc",
  "PathPrefix": ""
}

{
  "Output": "drivers/ptp/ptp_fc3.c=1002=static struct platform_driver idtfc3_driver = {\ndrivers/ptp/ptp_fc3.c-1003-\t.driver = {\ndrivers/ptp/ptp_fc3.c:1004:\t\t.name = \"rc38xxx-phc\",\ndrivers/ptp/ptp_fc3.c-1005-\t},\n"
}

gemini-3.1-pro-preview

null

null

							input: 4706
							output: 24
							thoughts: 35
						

**Platform Driver Instantiation Conundrum**

Okay, hold on a second. Something doesn't quite add up here. If this is a platform driver, and I don't see any explicit code creating the associated platform device, how is this thing getting instantiated in the system? That's a fundamental question. It should be obvious, but it's nagging at me.

Perhaps... *maybe* it's being managed through a Multi-Function Device (MFD) driver. That's a common pattern, isn't it? An MFD driver can expose multiple virtual devices. Alright, let's take a closer look at the MFD driver framework. I'm going to dig into the MFD drivers and see if I can find some clues there. It's time to follow the trail.

{
  "Expression": "rc38xxx",
  "PathPrefix": ""
}

{
  "Output": "drivers/ptp/ptp_fc3.c=1002=static struct platform_driver idtfc3_driver = {\ndrivers/ptp/ptp_fc3.c-1003-\t.driver = {\ndrivers/ptp/ptp_fc3.c:1004:\t\t.name = \"rc38xxx-phc\",\ndrivers/ptp/ptp_fc3.c-1005-\t},\n"
}

gemini-3.1-pro-preview

null

null

							input: 5056
							output: 23
							thoughts: 22
						

Here's my thought process, as if I were reviewing this information:

**Investigating an Unknown Term**

Okay, hold on a minute. "rc38xxx" isn't ringing any bells. I've scanned the other files in the project, and nothing seems to reference that specific term. This is strange, and warrants further investigation. I need to figure out where this came from.

My next step is to examine the `idtfc3` file. Maybe it's mentioned there, or perhaps the naming convention is similar. Hopefully, this file will shed some light on the origin or context of "rc38xxx". Time to dig in and see what's what.

{
  "Expression": "idtfc3",
  "PathPrefix": ""
}

{
  "Output": "\nFull output is too long, showing 500 out of 745 lines.\nUse more precise expression if possible.\n\ndrivers/ptp/ptp_fc3.c=36=module_param(firmware, charp, 0);\ndrivers/ptp/ptp_fc3.c-37-\ndrivers/ptp/ptp_fc3.c:38:static s64 ns2counters(struct idtfc3 *idtfc3, s64 nsec, u32 *sub_ns)\ndrivers/ptp/ptp_fc3.c-39-{\n--\ndrivers/ptp/ptp_fc3.c-43-\tif (likely(nsec \u003e= 0)) {\ndrivers/ptp/ptp_fc3.c:44:\t\tsync = div_u64_rem(nsec, idtfc3-\u003ens_per_sync, \u0026rem);\ndrivers/ptp/ptp_fc3.c-45-\t\t*sub_ns = rem;\ndrivers/ptp/ptp_fc3.c-46-\t} else {\ndrivers/ptp/ptp_fc3.c:47:\t\tsync = -div_u64_rem(-nsec - 1, idtfc3-\u003ens_per_sync, \u0026rem) - 1;\ndrivers/ptp/ptp_fc3.c:48:\t\t*sub_ns = idtfc3-\u003ens_per_sync - rem - 1;\ndrivers/ptp/ptp_fc3.c-49-\t}\ndrivers/ptp/ptp_fc3.c-50-\ndrivers/ptp/ptp_fc3.c:51:\treturn sync * idtfc3-\u003ens_per_sync;\ndrivers/ptp/ptp_fc3.c-52-}\ndrivers/ptp/ptp_fc3.c-53-\ndrivers/ptp/ptp_fc3.c:54:static s64 tdc_meas2offset(struct idtfc3 *idtfc3, u64 meas_read)\ndrivers/ptp/ptp_fc3.c-55-{\n--\ndrivers/ptp/ptp_fc3.c-60-\ndrivers/ptp/ptp_fc3.c:61:\tfine = div64_s64(fine * NSEC_PER_SEC, idtfc3-\u003etdc_apll_freq * 62LL);\ndrivers/ptp/ptp_fc3.c:62:\tcoarse = div64_s64(coarse * NSEC_PER_SEC, idtfc3-\u003etime_ref_freq);\ndrivers/ptp/ptp_fc3.c-63-\n--\ndrivers/ptp/ptp_fc3.c-66-\ndrivers/ptp/ptp_fc3.c:67:static s64 tdc_offset2phase(struct idtfc3 *idtfc3, s64 offset_ns)\ndrivers/ptp/ptp_fc3.c-68-{\ndrivers/ptp/ptp_fc3.c:69:\tif (offset_ns \u003e idtfc3-\u003ens_per_sync / 2)\ndrivers/ptp/ptp_fc3.c:70:\t\toffset_ns -= idtfc3-\u003ens_per_sync;\ndrivers/ptp/ptp_fc3.c-71-\ndrivers/ptp/ptp_fc3.c:72:\treturn offset_ns * idtfc3-\u003etdc_offset_sign;\ndrivers/ptp/ptp_fc3.c-73-}\ndrivers/ptp/ptp_fc3.c-74-\ndrivers/ptp/ptp_fc3.c:75:static int idtfc3_set_lpf_mode(struct idtfc3 *idtfc3, u8 mode)\ndrivers/ptp/ptp_fc3.c-76-{\n--\ndrivers/ptp/ptp_fc3.c-81-\ndrivers/ptp/ptp_fc3.c:82:\tif (idtfc3-\u003elpf_mode == mode)\ndrivers/ptp/ptp_fc3.c-83-\t\treturn 0;\ndrivers/ptp/ptp_fc3.c-84-\ndrivers/ptp/ptp_fc3.c:85:\terr = regmap_bulk_write(idtfc3-\u003eregmap, LPF_MODE_CNFG, \u0026mode, sizeof(mode));\ndrivers/ptp/ptp_fc3.c-86-\tif (err)\n--\ndrivers/ptp/ptp_fc3.c-88-\ndrivers/ptp/ptp_fc3.c:89:\tidtfc3-\u003elpf_mode = mode;\ndrivers/ptp/ptp_fc3.c-90-\n--\ndrivers/ptp/ptp_fc3.c-93-\ndrivers/ptp/ptp_fc3.c:94:static int idtfc3_enable_lpf(struct idtfc3 *idtfc3, bool enable)\ndrivers/ptp/ptp_fc3.c-95-{\n--\ndrivers/ptp/ptp_fc3.c-98-\ndrivers/ptp/ptp_fc3.c:99:\terr = regmap_bulk_read(idtfc3-\u003eregmap, LPF_CTRL, \u0026val, sizeof(val));\ndrivers/ptp/ptp_fc3.c-100-\tif (err)\n--\ndrivers/ptp/ptp_fc3.c-107-\ndrivers/ptp/ptp_fc3.c:108:\treturn regmap_bulk_write(idtfc3-\u003eregmap, LPF_CTRL, \u0026val, sizeof(val));\ndrivers/ptp/ptp_fc3.c-109-}\ndrivers/ptp/ptp_fc3.c-110-\ndrivers/ptp/ptp_fc3.c:111:static int idtfc3_get_time_ref_freq(struct idtfc3 *idtfc3)\ndrivers/ptp/ptp_fc3.c-112-{\n--\ndrivers/ptp/ptp_fc3.c-117-\ndrivers/ptp/ptp_fc3.c:118:\terr = regmap_bulk_read(idtfc3-\u003eregmap, TIME_CLOCK_MEAS_DIV_CNFG, buf, sizeof(buf));\ndrivers/ptp/ptp_fc3.c-119-\tif (err)\n--\ndrivers/ptp/ptp_fc3.c-122-\ndrivers/ptp/ptp_fc3.c:123:\terr = regmap_bulk_read(idtfc3-\u003eregmap, TIME_CLOCK_COUNT, buf, 1);\ndrivers/ptp/ptp_fc3.c-124-\tif (err)\n--\ndrivers/ptp/ptp_fc3.c-126-\ttime_clk_div = (buf[0] \u0026 TIME_CLOCK_COUNT_MASK) + 1;\ndrivers/ptp/ptp_fc3.c:127:\tidtfc3-\u003etime_ref_freq = idtfc3-\u003ehw_param.time_clk_freq *\ndrivers/ptp/ptp_fc3.c-128-\t\t\t\ttime_clk_div / time_ref_div;\n--\ndrivers/ptp/ptp_fc3.c-132-\ndrivers/ptp/ptp_fc3.c:133:static int idtfc3_get_tdc_offset_sign(struct idtfc3 *idtfc3)\ndrivers/ptp/ptp_fc3.c-134-{\n--\ndrivers/ptp/ptp_fc3.c-139-\ndrivers/ptp/ptp_fc3.c:140:\terr = regmap_bulk_read(idtfc3-\u003eregmap, TIME_CLOCK_TDC_FANOUT_CNFG, buf, sizeof(buf));\ndrivers/ptp/ptp_fc3.c-141-\tif (err)\n--\ndrivers/ptp/ptp_fc3.c-145-\tif ((val \u0026 TIME_SYNC_TO_TDC_EN) != TIME_SYNC_TO_TDC_EN) {\ndrivers/ptp/ptp_fc3.c:146:\t\tdev_err(idtfc3-\u003edev, \"TIME_SYNC_TO_TDC_EN is off !!!\");\ndrivers/ptp/ptp_fc3.c-147-\t\treturn -EINVAL;\n--\ndrivers/ptp/ptp_fc3.c-153-\tif ((sig1 == sig2) || ((sig1 != TIME_SYNC) \u0026\u0026 (sig2 != TIME_SYNC))) {\ndrivers/ptp/ptp_fc3.c:154:\t\tdev_err(idtfc3-\u003edev, \"Invalid tdc_mux_sel sig1=%d sig2=%d\", sig1, sig2);\ndrivers/ptp/ptp_fc3.c-155-\t\treturn -EINVAL;\ndrivers/ptp/ptp_fc3.c-156-\t} else if (sig1 == TIME_SYNC) {\ndrivers/ptp/ptp_fc3.c:157:\t\tidtfc3-\u003etdc_offset_sign = 1;\ndrivers/ptp/ptp_fc3.c-158-\t} else if (sig2 == TIME_SYNC) {\ndrivers/ptp/ptp_fc3.c:159:\t\tidtfc3-\u003etdc_offset_sign = -1;\ndrivers/ptp/ptp_fc3.c-160-\t}\n--\ndrivers/ptp/ptp_fc3.c-164-\ndrivers/ptp/ptp_fc3.c:165:static int idtfc3_lpf_bw(struct idtfc3 *idtfc3, u8 shift, u8 mult)\ndrivers/ptp/ptp_fc3.c-166-{\n--\ndrivers/ptp/ptp_fc3.c-168-\ndrivers/ptp/ptp_fc3.c:169:\treturn regmap_bulk_write(idtfc3-\u003eregmap, LPF_BW_CNFG, \u0026val, sizeof(val));\ndrivers/ptp/ptp_fc3.c-170-}\ndrivers/ptp/ptp_fc3.c-171-\ndrivers/ptp/ptp_fc3.c:172:static int idtfc3_enable_tdc(struct idtfc3 *idtfc3, bool enable, u8 meas_mode)\ndrivers/ptp/ptp_fc3.c-173-{\n--\ndrivers/ptp/ptp_fc3.c-177-\t/* Disable TDC first */\ndrivers/ptp/ptp_fc3.c:178:\terr = regmap_bulk_write(idtfc3-\u003eregmap, TIME_CLOCK_MEAS_CTRL, \u0026val, sizeof(val));\ndrivers/ptp/ptp_fc3.c-179-\tif (err)\n--\ndrivers/ptp/ptp_fc3.c-182-\tif (enable == false)\ndrivers/ptp/ptp_fc3.c:183:\t\treturn idtfc3_lpf_bw(idtfc3, LPF_BW_SHIFT_DEFAULT, LPF_BW_MULT_DEFAULT);\ndrivers/ptp/ptp_fc3.c-184-\n--\ndrivers/ptp/ptp_fc3.c-188-\t/* Change TDC meas mode */\ndrivers/ptp/ptp_fc3.c:189:\terr = regmap_bulk_write(idtfc3-\u003eregmap, TIME_CLOCK_MEAS_CNFG,\ndrivers/ptp/ptp_fc3.c-190-\t\t\t\t\u0026meas_mode, sizeof(meas_mode));\n--\ndrivers/ptp/ptp_fc3.c-197-\t\tval |= TDC_MEAS_START;\ndrivers/ptp/ptp_fc3.c:198:\terr = regmap_bulk_write(idtfc3-\u003eregmap, TIME_CLOCK_MEAS_CTRL, \u0026val, sizeof(val));\ndrivers/ptp/ptp_fc3.c-199-\tif (err)\n--\ndrivers/ptp/ptp_fc3.c-201-\ndrivers/ptp/ptp_fc3.c:202:\treturn idtfc3_lpf_bw(idtfc3, LPF_BW_SHIFT_1PPS, LPF_BW_MULT_DEFAULT);\ndrivers/ptp/ptp_fc3.c-203-}\ndrivers/ptp/ptp_fc3.c-204-\ndrivers/ptp/ptp_fc3.c:205:static bool get_tdc_meas(struct idtfc3 *idtfc3, s64 *offset_ns)\ndrivers/ptp/ptp_fc3.c-206-{\n--\ndrivers/ptp/ptp_fc3.c-212-\twhile (true) {\ndrivers/ptp/ptp_fc3.c:213:\t\terr = regmap_bulk_read(idtfc3-\u003eregmap, TDC_FIFO_STS,\ndrivers/ptp/ptp_fc3.c-214-\t\t\t\t       \u0026val, sizeof(val));\n--\ndrivers/ptp/ptp_fc3.c-220-\ndrivers/ptp/ptp_fc3.c:221:\t\terr = regmap_bulk_read(idtfc3-\u003eregmap, TDC_FIFO_READ_REQ,\ndrivers/ptp/ptp_fc3.c-222-\t\t\t\t       \u0026buf, sizeof(buf));\n--\ndrivers/ptp/ptp_fc3.c-229-\tif (valid)\ndrivers/ptp/ptp_fc3.c:230:\t\t*offset_ns = tdc_meas2offset(idtfc3, get_unaligned_le64(\u0026buf[1]));\ndrivers/ptp/ptp_fc3.c-231-\n--\ndrivers/ptp/ptp_fc3.c-234-\ndrivers/ptp/ptp_fc3.c:235:static int check_tdc_fifo_overrun(struct idtfc3 *idtfc3)\ndrivers/ptp/ptp_fc3.c-236-{\n--\ndrivers/ptp/ptp_fc3.c-240-\t/* Check if FIFO is overrun */\ndrivers/ptp/ptp_fc3.c:241:\terr = regmap_bulk_read(idtfc3-\u003eregmap, TDC_FIFO_STS, \u0026val, sizeof(val));\ndrivers/ptp/ptp_fc3.c-242-\tif (err)\n--\ndrivers/ptp/ptp_fc3.c-247-\ndrivers/ptp/ptp_fc3.c:248:\tdev_warn(idtfc3-\u003edev, \"TDC FIFO overrun !!!\");\ndrivers/ptp/ptp_fc3.c-249-\ndrivers/ptp/ptp_fc3.c:250:\terr = idtfc3_enable_tdc(idtfc3, true, CONTINUOUS);\ndrivers/ptp/ptp_fc3.c-251-\tif (err)\n--\ndrivers/ptp/ptp_fc3.c-256-\ndrivers/ptp/ptp_fc3.c:257:static int get_tdc_meas_continuous(struct idtfc3 *idtfc3)\ndrivers/ptp/ptp_fc3.c-258-{\n--\ndrivers/ptp/ptp_fc3.c-262-\ndrivers/ptp/ptp_fc3.c:263:\terr = check_tdc_fifo_overrun(idtfc3);\ndrivers/ptp/ptp_fc3.c-264-\tif (err)\n--\ndrivers/ptp/ptp_fc3.c-266-\ndrivers/ptp/ptp_fc3.c:267:\tif (get_tdc_meas(idtfc3, \u0026offset_ns) \u0026\u0026 offset_ns \u003e= 0) {\ndrivers/ptp/ptp_fc3.c-268-\t\tevent.index = 0;\ndrivers/ptp/ptp_fc3.c:269:\t\tevent.offset = tdc_offset2phase(idtfc3, offset_ns);\ndrivers/ptp/ptp_fc3.c-270-\t\tevent.type = PTP_CLOCK_EXTOFF;\ndrivers/ptp/ptp_fc3.c:271:\t\tptp_clock_event(idtfc3-\u003eptp_clock, \u0026event);\ndrivers/ptp/ptp_fc3.c-272-\t}\n--\ndrivers/ptp/ptp_fc3.c-276-\ndrivers/ptp/ptp_fc3.c:277:static int idtfc3_read_subcounter(struct idtfc3 *idtfc3)\ndrivers/ptp/ptp_fc3.c-278-{\n--\ndrivers/ptp/ptp_fc3.c-281-\ndrivers/ptp/ptp_fc3.c:282:\terr = regmap_bulk_read(idtfc3-\u003eregmap, TOD_COUNTER_READ_REQ,\ndrivers/ptp/ptp_fc3.c-283-\t\t\t       \u0026buf, sizeof(buf));\n--\ndrivers/ptp/ptp_fc3.c-290-\ndrivers/ptp/ptp_fc3.c:291:static int idtfc3_tod_update_is_done(struct idtfc3 *idtfc3)\ndrivers/ptp/ptp_fc3.c-292-{\n--\ndrivers/ptp/ptp_fc3.c-296-\terr = read_poll_timeout_atomic(regmap_bulk_read, err, !req, USEC_PER_MSEC,\ndrivers/ptp/ptp_fc3.c:297:\t\t\t\t       idtfc3-\u003etc_write_timeout, true, idtfc3-\u003eregmap,\ndrivers/ptp/ptp_fc3.c-298-\t\t\t\t       TOD_SYNC_LOAD_REQ_CTRL, \u0026req, 1);\ndrivers/ptp/ptp_fc3.c-299-\tif (err)\ndrivers/ptp/ptp_fc3.c:300:\t\tdev_err(idtfc3-\u003edev, \"TOD counter write timeout !!!\");\ndrivers/ptp/ptp_fc3.c-301-\n--\ndrivers/ptp/ptp_fc3.c-304-\ndrivers/ptp/ptp_fc3.c:305:static int idtfc3_write_subcounter(struct idtfc3 *idtfc3, u32 counter)\ndrivers/ptp/ptp_fc3.c-306-{\n--\ndrivers/ptp/ptp_fc3.c-315-\ndrivers/ptp/ptp_fc3.c:316:\terr = regmap_bulk_write(idtfc3-\u003eregmap, TOD_SYNC_LOAD_VAL_CTRL,\ndrivers/ptp/ptp_fc3.c-317-\t\t\t\t\u0026buf, sizeof(buf));\n--\ndrivers/ptp/ptp_fc3.c-320-\ndrivers/ptp/ptp_fc3.c:321:\treturn idtfc3_tod_update_is_done(idtfc3);\ndrivers/ptp/ptp_fc3.c-322-}\ndrivers/ptp/ptp_fc3.c-323-\ndrivers/ptp/ptp_fc3.c:324:static int idtfc3_timecounter_update(struct idtfc3 *idtfc3, u32 counter, s64 ns)\ndrivers/ptp/ptp_fc3.c-325-{\n--\ndrivers/ptp/ptp_fc3.c-327-\ndrivers/ptp/ptp_fc3.c:328:\terr = idtfc3_write_subcounter(idtfc3, counter);\ndrivers/ptp/ptp_fc3.c-329-\tif (err)\n--\ndrivers/ptp/ptp_fc3.c-332-\t/* Update time counter */\ndrivers/ptp/ptp_fc3.c:333:\tidtfc3-\u003ens = ns;\ndrivers/ptp/ptp_fc3.c:334:\tidtfc3-\u003elast_counter = counter;\ndrivers/ptp/ptp_fc3.c-335-\n--\ndrivers/ptp/ptp_fc3.c-338-\ndrivers/ptp/ptp_fc3.c:339:static int idtfc3_timecounter_read(struct idtfc3 *idtfc3)\ndrivers/ptp/ptp_fc3.c-340-{\n--\ndrivers/ptp/ptp_fc3.c-342-\ndrivers/ptp/ptp_fc3.c:343:\tnow = idtfc3_read_subcounter(idtfc3);\ndrivers/ptp/ptp_fc3.c-344-\tif (now \u003c 0)\n--\ndrivers/ptp/ptp_fc3.c-346-\ndrivers/ptp/ptp_fc3.c:347:\t/* calculate the delta since the last idtfc3_timecounter_read(): */\ndrivers/ptp/ptp_fc3.c:348:\tif (now \u003e= idtfc3-\u003elast_counter)\ndrivers/ptp/ptp_fc3.c:349:\t\tdelta = now - idtfc3-\u003elast_counter;\ndrivers/ptp/ptp_fc3.c-350-\telse\ndrivers/ptp/ptp_fc3.c:351:\t\tdelta = idtfc3-\u003esub_sync_count - idtfc3-\u003elast_counter + now;\ndrivers/ptp/ptp_fc3.c-352-\ndrivers/ptp/ptp_fc3.c-353-\t/* Update time counter */\ndrivers/ptp/ptp_fc3.c:354:\tidtfc3-\u003ens += delta * idtfc3-\u003ens_per_counter;\ndrivers/ptp/ptp_fc3.c:355:\tidtfc3-\u003elast_counter = now;\ndrivers/ptp/ptp_fc3.c-356-\n--\ndrivers/ptp/ptp_fc3.c-359-\ndrivers/ptp/ptp_fc3.c:360:static int _idtfc3_gettime(struct idtfc3 *idtfc3, struct timespec64 *ts)\ndrivers/ptp/ptp_fc3.c-361-{\n--\ndrivers/ptp/ptp_fc3.c-363-\ndrivers/ptp/ptp_fc3.c:364:\terr = idtfc3_timecounter_read(idtfc3);\ndrivers/ptp/ptp_fc3.c-365-\tif (err)\n--\ndrivers/ptp/ptp_fc3.c-367-\ndrivers/ptp/ptp_fc3.c:368:\t*ts = ns_to_timespec64(idtfc3-\u003ens);\ndrivers/ptp/ptp_fc3.c-369-\n--\ndrivers/ptp/ptp_fc3.c-372-\ndrivers/ptp/ptp_fc3.c:373:static int idtfc3_gettime(struct ptp_clock_info *ptp, struct timespec64 *ts)\ndrivers/ptp/ptp_fc3.c-374-{\ndrivers/ptp/ptp_fc3.c:375:\tstruct idtfc3 *idtfc3 = container_of(ptp, struct idtfc3, caps);\ndrivers/ptp/ptp_fc3.c-376-\tint err;\ndrivers/ptp/ptp_fc3.c-377-\ndrivers/ptp/ptp_fc3.c:378:\tmutex_lock(idtfc3-\u003elock);\ndrivers/ptp/ptp_fc3.c:379:\terr = _idtfc3_gettime(idtfc3, ts);\ndrivers/ptp/ptp_fc3.c:380:\tmutex_unlock(idtfc3-\u003elock);\ndrivers/ptp/ptp_fc3.c-381-\n--\ndrivers/ptp/ptp_fc3.c-384-\ndrivers/ptp/ptp_fc3.c:385:static int _idtfc3_settime(struct idtfc3 *idtfc3, const struct timespec64 *ts)\ndrivers/ptp/ptp_fc3.c-386-{\n--\ndrivers/ptp/ptp_fc3.c-391-\tif (timespec64_valid(ts) == false) {\ndrivers/ptp/ptp_fc3.c:392:\t\tdev_err(idtfc3-\u003edev, \"%s: invalid timespec\", __func__);\ndrivers/ptp/ptp_fc3.c-393-\t\treturn -EINVAL;\n--\ndrivers/ptp/ptp_fc3.c-395-\ndrivers/ptp/ptp_fc3.c:396:\tnow = idtfc3_read_subcounter(idtfc3);\ndrivers/ptp/ptp_fc3.c-397-\tif (now \u003c 0)\n--\ndrivers/ptp/ptp_fc3.c-399-\ndrivers/ptp/ptp_fc3.c:400:\toffset_ns = (idtfc3-\u003esub_sync_count - now) * idtfc3-\u003ens_per_counter;\ndrivers/ptp/ptp_fc3.c-401-\tnow_ns = timespec64_to_ns(ts);\ndrivers/ptp/ptp_fc3.c:402:\t(void)ns2counters(idtfc3, offset_ns + now_ns, \u0026sub_ns);\ndrivers/ptp/ptp_fc3.c-403-\ndrivers/ptp/ptp_fc3.c:404:\tcounter = sub_ns / idtfc3-\u003ens_per_counter;\ndrivers/ptp/ptp_fc3.c:405:\treturn idtfc3_timecounter_update(idtfc3, counter, now_ns);\ndrivers/ptp/ptp_fc3.c-406-}\ndrivers/ptp/ptp_fc3.c-407-\ndrivers/ptp/ptp_fc3.c:408:static int idtfc3_settime(struct ptp_clock_info *ptp, const struct timespec64 *ts)\ndrivers/ptp/ptp_fc3.c-409-{\ndrivers/ptp/ptp_fc3.c:410:\tstruct idtfc3 *idtfc3 = container_of(ptp, struct idtfc3, caps);\ndrivers/ptp/ptp_fc3.c-411-\tint err;\ndrivers/ptp/ptp_fc3.c-412-\ndrivers/ptp/ptp_fc3.c:413:\tmutex_lock(idtfc3-\u003elock);\ndrivers/ptp/ptp_fc3.c:414:\terr = _idtfc3_settime(idtfc3, ts);\ndrivers/ptp/ptp_fc3.c:415:\tmutex_unlock(idtfc3-\u003elock);\ndrivers/ptp/ptp_fc3.c-416-\n--\ndrivers/ptp/ptp_fc3.c-419-\ndrivers/ptp/ptp_fc3.c:420:static int _idtfc3_adjtime(struct idtfc3 *idtfc3, s64 delta)\ndrivers/ptp/ptp_fc3.c-421-{\n--\ndrivers/ptp/ptp_fc3.c-429-\ndrivers/ptp/ptp_fc3.c:430:\tif (idtfc3-\u003ens + delta \u003c 0) {\ndrivers/ptp/ptp_fc3.c:431:\t\tdev_err(idtfc3-\u003edev, \"%lld ns adj is too large\", delta);\ndrivers/ptp/ptp_fc3.c-432-\t\treturn -EINVAL;\n--\ndrivers/ptp/ptp_fc3.c-434-\ndrivers/ptp/ptp_fc3.c:435:\tsync_ns = ns2counters(idtfc3, delta + idtfc3-\u003ens_per_sync, \u0026sub_ns);\ndrivers/ptp/ptp_fc3.c-436-\ndrivers/ptp/ptp_fc3.c:437:\tcounter = sub_ns / idtfc3-\u003ens_per_counter;\ndrivers/ptp/ptp_fc3.c:438:\treturn idtfc3_timecounter_update(idtfc3, counter, idtfc3-\u003ens + sync_ns +\ndrivers/ptp/ptp_fc3.c:439:\t\t\t\t\t\t\t\t\tcounter * idtfc3-\u003ens_per_counter);\ndrivers/ptp/ptp_fc3.c-440-}\ndrivers/ptp/ptp_fc3.c-441-\ndrivers/ptp/ptp_fc3.c:442:static int idtfc3_adjtime(struct ptp_clock_info *ptp, s64 delta)\ndrivers/ptp/ptp_fc3.c-443-{\ndrivers/ptp/ptp_fc3.c:444:\tstruct idtfc3 *idtfc3 = container_of(ptp, struct idtfc3, caps);\ndrivers/ptp/ptp_fc3.c-445-\tint err;\ndrivers/ptp/ptp_fc3.c-446-\ndrivers/ptp/ptp_fc3.c:447:\tmutex_lock(idtfc3-\u003elock);\ndrivers/ptp/ptp_fc3.c:448:\terr = _idtfc3_adjtime(idtfc3, delta);\ndrivers/ptp/ptp_fc3.c:449:\tmutex_unlock(idtfc3-\u003elock);\ndrivers/ptp/ptp_fc3.c-450-\n--\ndrivers/ptp/ptp_fc3.c-453-\ndrivers/ptp/ptp_fc3.c:454:static int _idtfc3_adjphase(struct idtfc3 *idtfc3, s32 delta)\ndrivers/ptp/ptp_fc3.c-455-{\n--\ndrivers/ptp/ptp_fc3.c-459-\ndrivers/ptp/ptp_fc3.c:460:\terr = idtfc3_set_lpf_mode(idtfc3, LPF_WP);\ndrivers/ptp/ptp_fc3.c-461-\tif (err)\n--\ndrivers/ptp/ptp_fc3.c-471-\t */\ndrivers/ptp/ptp_fc3.c:472:\tpcw = div_s64((s64)delta * idtfc3-\u003etdc_apll_freq * 124, NSEC_PER_SEC);\ndrivers/ptp/ptp_fc3.c-473-\n--\ndrivers/ptp/ptp_fc3.c-475-\ndrivers/ptp/ptp_fc3.c:476:\treturn regmap_bulk_write(idtfc3-\u003eregmap, LPF_WR_PHASE_CTRL, buf, sizeof(buf));\ndrivers/ptp/ptp_fc3.c-477-}\ndrivers/ptp/ptp_fc3.c-478-\ndrivers/ptp/ptp_fc3.c:479:static int idtfc3_adjphase(struct ptp_clock_info *ptp, s32 delta)\ndrivers/ptp/ptp_fc3.c-480-{\ndrivers/ptp/ptp_fc3.c:481:\tstruct idtfc3 *idtfc3 = container_of(ptp, struct idtfc3, caps);\ndrivers/ptp/ptp_fc3.c-482-\tint err;\ndrivers/ptp/ptp_fc3.c-483-\ndrivers/ptp/ptp_fc3.c:484:\tmutex_lock(idtfc3-\u003elock);\ndrivers/ptp/ptp_fc3.c:485:\terr = _idtfc3_adjphase(idtfc3, delta);\ndrivers/ptp/ptp_fc3.c:486:\tmutex_unlock(idtfc3-\u003elock);\ndrivers/ptp/ptp_fc3.c-487-\n--\ndrivers/ptp/ptp_fc3.c-490-\ndrivers/ptp/ptp_fc3.c:491:static int _idtfc3_adjfine(struct idtfc3 *idtfc3, long scaled_ppm)\ndrivers/ptp/ptp_fc3.c-492-{\n--\ndrivers/ptp/ptp_fc3.c-496-\ndrivers/ptp/ptp_fc3.c:497:\terr = idtfc3_set_lpf_mode(idtfc3, LPF_WF);\ndrivers/ptp/ptp_fc3.c-498-\tif (err)\n--\ndrivers/ptp/ptp_fc3.c-518-\ndrivers/ptp/ptp_fc3.c:519:\treturn regmap_bulk_write(idtfc3-\u003eregmap, LPF_WR_FREQ_CTRL, buf, sizeof(buf));\ndrivers/ptp/ptp_fc3.c-520-}\ndrivers/ptp/ptp_fc3.c-521-\ndrivers/ptp/ptp_fc3.c:522:static int idtfc3_adjfine(struct ptp_clock_info *ptp, long scaled_ppm)\ndrivers/ptp/ptp_fc3.c-523-{\ndrivers/ptp/ptp_fc3.c:524:\tstruct idtfc3 *idtfc3 = container_of(ptp, struct idtfc3, caps);\ndrivers/ptp/ptp_fc3.c-525-\tint err;\ndrivers/ptp/ptp_fc3.c-526-\ndrivers/ptp/ptp_fc3.c:527:\tmutex_lock(idtfc3-\u003elock);\ndrivers/ptp/ptp_fc3.c:528:\terr = _idtfc3_adjfine(idtfc3, scaled_ppm);\ndrivers/ptp/ptp_fc3.c:529:\tmutex_unlock(idtfc3-\u003elock);\ndrivers/ptp/ptp_fc3.c-530-\n--\ndrivers/ptp/ptp_fc3.c-533-\ndrivers/ptp/ptp_fc3.c:534:static int idtfc3_enable(struct ptp_clock_info *ptp,\ndrivers/ptp/ptp_fc3.c-535-\t\t\t struct ptp_clock_request *rq, int on)\ndrivers/ptp/ptp_fc3.c-536-{\ndrivers/ptp/ptp_fc3.c:537:\tstruct idtfc3 *idtfc3 = container_of(ptp, struct idtfc3, caps);\ndrivers/ptp/ptp_fc3.c-538-\tint err = -EOPNOTSUPP;\ndrivers/ptp/ptp_fc3.c-539-\ndrivers/ptp/ptp_fc3.c:540:\tmutex_lock(idtfc3-\u003elock);\ndrivers/ptp/ptp_fc3.c-541-\tswitch (rq-\u003etype) {\n--\ndrivers/ptp/ptp_fc3.c-557-\t\t\telse\ndrivers/ptp/ptp_fc3.c:558:\t\t\t\terr = idtfc3_enable_tdc(idtfc3, true, CONTINUOUS);\ndrivers/ptp/ptp_fc3.c-559-\t\t} else {\ndrivers/ptp/ptp_fc3.c:560:\t\t\terr = idtfc3_enable_tdc(idtfc3, false, MEAS_MODE_INVALID);\ndrivers/ptp/ptp_fc3.c-561-\t\t}\n--\ndrivers/ptp/ptp_fc3.c-565-\t}\ndrivers/ptp/ptp_fc3.c:566:\tmutex_unlock(idtfc3-\u003elock);\ndrivers/ptp/ptp_fc3.c-567-\ndrivers/ptp/ptp_fc3.c-568-\tif (err)\ndrivers/ptp/ptp_fc3.c:569:\t\tdev_err(idtfc3-\u003edev, \"Failed in %s with err %d!\", __func__, err);\ndrivers/ptp/ptp_fc3.c-570-\n--\ndrivers/ptp/ptp_fc3.c-573-\ndrivers/ptp/ptp_fc3.c:574:static long idtfc3_aux_work(struct ptp_clock_info *ptp)\ndrivers/ptp/ptp_fc3.c-575-{\ndrivers/ptp/ptp_fc3.c:576:\tstruct idtfc3 *idtfc3 = container_of(ptp, struct idtfc3, caps);\ndrivers/ptp/ptp_fc3.c-577-\tstatic int tdc_get;\ndrivers/ptp/ptp_fc3.c-578-\ndrivers/ptp/ptp_fc3.c:579:\tmutex_lock(idtfc3-\u003elock);\ndrivers/ptp/ptp_fc3.c-580-\ttdc_get %= TDC_GET_PERIOD;\ndrivers/ptp/ptp_fc3.c-581-\tif ((tdc_get == 0) || (tdc_get == TDC_GET_PERIOD / 2))\ndrivers/ptp/ptp_fc3.c:582:\t\tidtfc3_timecounter_read(idtfc3);\ndrivers/ptp/ptp_fc3.c:583:\tget_tdc_meas_continuous(idtfc3);\ndrivers/ptp/ptp_fc3.c-584-\ttdc_get++;\ndrivers/ptp/ptp_fc3.c:585:\tmutex_unlock(idtfc3-\u003elock);\ndrivers/ptp/ptp_fc3.c-586-\ndrivers/ptp/ptp_fc3.c:587:\treturn idtfc3-\u003etc_update_period;\ndrivers/ptp/ptp_fc3.c-588-}\ndrivers/ptp/ptp_fc3.c-589-\ndrivers/ptp/ptp_fc3.c:590:static const struct ptp_clock_info idtfc3_caps = {\ndrivers/ptp/ptp_fc3.c-591-\t.owner\t\t= THIS_MODULE,\n--\ndrivers/ptp/ptp_fc3.c-595-\t.supported_extts_flags = PTP_STRICT_FLAGS | PTP_EXT_OFFSET,\ndrivers/ptp/ptp_fc3.c:596:\t.adjphase\t= \u0026idtfc3_adjphase,\ndrivers/ptp/ptp_fc3.c:597:\t.adjfine\t= \u0026idtfc3_adjfine,\ndrivers/ptp/ptp_fc3.c:598:\t.adjtime\t= \u0026idtfc3_adjtime,\ndrivers/ptp/ptp_fc3.c:599:\t.gettime64\t= \u0026idtfc3_gettime,\ndrivers/ptp/ptp_fc3.c:600:\t.settime64\t= \u0026idtfc3_settime,\ndrivers/ptp/ptp_fc3.c:601:\t.enable\t\t= \u0026idtfc3_enable,\ndrivers/ptp/ptp_fc3.c:602:\t.do_aux_work\t= \u0026idtfc3_aux_work,\ndrivers/ptp/ptp_fc3.c-603-};\ndrivers/ptp/ptp_fc3.c-604-\ndrivers/ptp/ptp_fc3.c:605:static int idtfc3_hw_calibrate(struct idtfc3 *idtfc3)\ndrivers/ptp/ptp_fc3.c-606-{\n--\ndrivers/ptp/ptp_fc3.c-617-\tval = TDC_EN;\ndrivers/ptp/ptp_fc3.c:618:\terr = regmap_bulk_write(idtfc3-\u003eregmap, TDC_CTRL,\ndrivers/ptp/ptp_fc3.c-619-\t\t\t\t\u0026val, sizeof(val));\n--\ndrivers/ptp/ptp_fc3.c-622-\tval = TDC_EN | TDC_DAC_RECAL_REQ;\ndrivers/ptp/ptp_fc3.c:623:\terr = regmap_bulk_write(idtfc3-\u003eregmap, TDC_CTRL,\ndrivers/ptp/ptp_fc3.c-624-\t\t\t\t\u0026val, sizeof(val));\n--\ndrivers/ptp/ptp_fc3.c-634-\tval = 0;\ndrivers/ptp/ptp_fc3.c:635:\terr = regmap_bulk_write(idtfc3-\u003eregmap, SOFT_RESET_CTRL,\ndrivers/ptp/ptp_fc3.c-636-\t\t\t\t\u0026val, sizeof(val));\n--\ndrivers/ptp/ptp_fc3.c-639-\tval = APLL_REINIT;\ndrivers/ptp/ptp_fc3.c:640:\terr = regmap_bulk_write(idtfc3-\u003eregmap, SOFT_RESET_CTRL,\ndrivers/ptp/ptp_fc3.c-641-\t\t\t\t\u0026val, sizeof(val));\n--\ndrivers/ptp/ptp_fc3.c-648-\ndrivers/ptp/ptp_fc3.c:649:static int idtfc3_init_timecounter(struct idtfc3 *idtfc3)\ndrivers/ptp/ptp_fc3.c-650-{\n--\ndrivers/ptp/ptp_fc3.c-653-\ndrivers/ptp/ptp_fc3.c:654:\tperiod_ms = idtfc3-\u003esub_sync_count * MSEC_PER_SEC /\ndrivers/ptp/ptp_fc3.c:655:\t\t\tidtfc3-\u003ehw_param.time_clk_freq;\ndrivers/ptp/ptp_fc3.c-656-\ndrivers/ptp/ptp_fc3.c:657:\tidtfc3-\u003etc_update_period = msecs_to_jiffies(period_ms / TDC_GET_PERIOD);\ndrivers/ptp/ptp_fc3.c:658:\tidtfc3-\u003etc_write_timeout = period_ms * USEC_PER_MSEC;\ndrivers/ptp/ptp_fc3.c-659-\ndrivers/ptp/ptp_fc3.c:660:\terr = idtfc3_timecounter_update(idtfc3, 0, 0);\ndrivers/ptp/ptp_fc3.c-661-\tif (err)\n--\ndrivers/ptp/ptp_fc3.c-663-\ndrivers/ptp/ptp_fc3.c:664:\terr = idtfc3_timecounter_read(idtfc3);\ndrivers/ptp/ptp_fc3.c-665-\tif (err)\n--\ndrivers/ptp/ptp_fc3.c-670-\ndrivers/ptp/ptp_fc3.c:671:static int idtfc3_get_tdc_apll_freq(struct idtfc3 *idtfc3)\ndrivers/ptp/ptp_fc3.c-672-{\n--\ndrivers/ptp/ptp_fc3.c-675-\tu8 tdc_ref_div;\ndrivers/ptp/ptp_fc3.c:676:\tstruct idtfc3_hw_param *param = \u0026idtfc3-\u003ehw_param;\ndrivers/ptp/ptp_fc3.c-677-\ndrivers/ptp/ptp_fc3.c:678:\terr = regmap_bulk_read(idtfc3-\u003eregmap, TDC_REF_DIV_CNFG,\ndrivers/ptp/ptp_fc3.c-679-\t\t\t\t\u0026tdc_ref_div, sizeof(tdc_ref_div));\n--\ndrivers/ptp/ptp_fc3.c-682-\ndrivers/ptp/ptp_fc3.c:683:\terr = regmap_bulk_read(idtfc3-\u003eregmap, TDC_FB_DIV_INT_CNFG,\ndrivers/ptp/ptp_fc3.c-684-\t\t\t\t\u0026tdc_fb_div_int, sizeof(tdc_fb_div_int));\n--\ndrivers/ptp/ptp_fc3.c-690-\ndrivers/ptp/ptp_fc3.c:691:\tidtfc3-\u003etdc_apll_freq = div_u64(param-\u003extal_freq * (u64)tdc_fb_div_int,\ndrivers/ptp/ptp_fc3.c-692-\t\t\t\t\t1 \u003c\u003c tdc_ref_div);\n--\ndrivers/ptp/ptp_fc3.c-696-\ndrivers/ptp/ptp_fc3.c:697:static int idtfc3_get_fod(struct idtfc3 *idtfc3)\ndrivers/ptp/ptp_fc3.c-698-{\n--\ndrivers/ptp/ptp_fc3.c-701-\ndrivers/ptp/ptp_fc3.c:702:\terr = regmap_bulk_read(idtfc3-\u003eregmap, TIME_CLOCK_SRC, \u0026fod, sizeof(fod));\ndrivers/ptp/ptp_fc3.c-703-\tif (err)\n--\ndrivers/ptp/ptp_fc3.c-707-\tcase 0:\ndrivers/ptp/ptp_fc3.c:708:\t\tidtfc3-\u003efod_n = FOD_0;\ndrivers/ptp/ptp_fc3.c-709-\t\tbreak;\ndrivers/ptp/ptp_fc3.c-710-\tcase 1:\ndrivers/ptp/ptp_fc3.c:711:\t\tidtfc3-\u003efod_n = FOD_1;\ndrivers/ptp/ptp_fc3.c-712-\t\tbreak;\ndrivers/ptp/ptp_fc3.c-713-\tcase 2:\ndrivers/ptp/ptp_fc3.c:714:\t\tidtfc3-\u003efod_n = FOD_2;\ndrivers/ptp/ptp_fc3.c-715-\t\tbreak;\n--\ndrivers/ptp/ptp_fc3.c-722-\ndrivers/ptp/ptp_fc3.c:723:static int idtfc3_get_sync_count(struct idtfc3 *idtfc3)\ndrivers/ptp/ptp_fc3.c-724-{\n--\ndrivers/ptp/ptp_fc3.c-727-\ndrivers/ptp/ptp_fc3.c:728:\terr = regmap_bulk_read(idtfc3-\u003eregmap, SUB_SYNC_GEN_CNFG, buf, sizeof(buf));\ndrivers/ptp/ptp_fc3.c-729-\tif (err)\n--\ndrivers/ptp/ptp_fc3.c-731-\ndrivers/ptp/ptp_fc3.c:732:\tidtfc3-\u003esub_sync_count = (get_unaligned_le32(buf) \u0026 SUB_SYNC_COUNTER_MASK) + 1;\ndrivers/ptp/ptp_fc3.c:733:\tidtfc3-\u003ens_per_counter = NSEC_PER_SEC / idtfc3-\u003ehw_param.time_clk_freq;\n\n"
}

gemini-3.1-pro-preview

null

null

							input: 17473
							output: 27
							thoughts: 52
						

**Analyzing the idtfc3 Probe Function**

Okay, so `idtfc3_probe` gets called during platform device probing, right? That's the key starting point. Now, the next question is crucial for understanding the driver's setup: Where does this platform device actually *come from*? Is another driver responsible for creating it dynamically, or is it defined directly in the device tree? I need to figure this out. Time to go back and double-check the `idtfc3_driver` structure to see if there's anything obvious I missed the first time around. Need to make sure I haven't forgotten anything.

{
  "Expression": "rc38xxx-phc",
  "PathPrefix": ""
}

{
  "Output": "drivers/ptp/ptp_fc3.c=1002=static struct platform_driver idtfc3_driver = {\ndrivers/ptp/ptp_fc3.c-1003-\t.driver = {\ndrivers/ptp/ptp_fc3.c:1004:\t\t.name = \"rc38xxx-phc\",\ndrivers/ptp/ptp_fc3.c-1005-\t},\n"
}

gemini-3.1-pro-preview

null

null

							input: 17807
							output: 26
							thoughts: 96
						

**Investigating the Origin of the `rc38xxx-phc` Driver**

Okay, so I'm trying to figure out where the `rc38xxx-phc` driver originates. My initial hunch is that it might be created by `mfd` (Multi-Function Device) drivers. That seems logical, so the first thing I'll do is a comprehensive search of the entire kernel source tree for occurrences of `rc38xxx-phc`.

Alright, the results are in. Hmm, interesting. The search for `rc38xxx-phc` only points to `drivers/ptp/ptp_fc3.c`. That's not quite what I expected. Time to broaden the net. Since `rc38xxx-phc` is related to `rc38xxx` or the similar `idtfc3` I'll specifically focus my search on the `drivers/mfd/` (Multi-Function Device) and `drivers/clk/` (Clock drivers) directories. That's a good next step to narrow down the possible source and uncover the driver's parent or relevant connections.

{
  "Expression": "rc38xxx",
  "PathPrefix": "drivers/"
}

{
  "Output": "drivers/ptp/ptp_fc3.c=1002=static struct platform_driver idtfc3_driver = {\ndrivers/ptp/ptp_fc3.c-1003-\t.driver = {\ndrivers/ptp/ptp_fc3.c:1004:\t\t.name = \"rc38xxx-phc\",\ndrivers/ptp/ptp_fc3.c-1005-\t},\n"
}

gemini-3.1-pro-preview

null

null

							input: 18292
							output: 27
							thoughts: 70
						

**Investigating the Origins of This Resource**

Okay, so I'm scratching my head. If this thing isn't being explicitly *created* anywhere I can see, how on earth is it getting used? That's the real puzzle. My initial thought is it's gotta be an I2C or SPI driver. They're often responsible for initializing and making low-level resources available.

So, I need to start looking in that direction. Where's a likely candidate? Ah, right. Let's see... since we know it's related to the `idtfc3` I need to check `drivers/clk/clk-idtfc3.c`. That seems like a prime spot to start digging around. Time to dive into the code.

Alternatively, maybe there's a more efficient way to scan for it. Let's try searching for instances of `idtfc3` specifically within the `drivers/clk/` directory. That should give me a good overview of where it's being referenced and potentially created, or at least how it interacts with other components. A targeted search should be quicker than manually grepping the entire kernel.

no matches

{
  "Expression": "idtfc3",
  "PathPrefix": "drivers/clk/"
}

{
  "error": "no matches"
}

gemini-3.1-pro-preview

null

null

							input: 18646
							output: 28
							thoughts: 18
						

Here's my thought process, summarized as you requested:

**Navigating the Driver Landscape for `idtfc3`**

Okay, so I need to find something related to `idtfc3`, and based on experience, that's likely a driver. Given that it's likely a specific piece of hardware or functionality, I'm going to start my search in the `drivers/mfd/` directory. That's a reasonable starting point, as it's the Multiple Function Device (MFD) area, and many hardware components that use proprietary or system-specific protocols often fall under this category. This is the place to start, as multiple devices, or devices that manage multiple functions, often use this. I'll need to look in that directory and search for references to `idtfc3`. Hopefully, the search yields a matching driver or, at the very least, relevant code that I can investigate further. If it's not there, I'll need to broaden the search, but this is the logical first step.

no matches

{
  "Expression": "idtfc3",
  "PathPrefix": "drivers/mfd/"
}

{
  "error": "no matches"
}

gemini-3.1-pro-preview

null

null

							input: 18922
							output: 27
							thoughts: 17
						

Here's a summary of my thought process, as if I were the one thinking it:

**Digging into the Kernel's Network Drivers**

Okay, so I need to find the code related to `idtfc3`. My initial instinct is to check the network drivers, which is usually the right place to start for anything network-related. Therefore, I'll navigate to the `drivers/net/` directory within the kernel source. That's the most logical starting point for investigating `idtfc3`. Hopefully, the file or module I'm seeking is directly related to a driver there. Let's see what we find!

no matches

{
  "Expression": "idtfc3",
  "PathPrefix": "drivers/net/"
}

{
  "error": "no matches"
}

gemini-3.1-pro-preview

null

null

							input: 19114
							output: 28
							thoughts: 18
						

Here's a summary of my thought process:

**Searching for `idtfc3` in the PTP Drivers**

Okay, so I need to find something specific, `idtfc3`. My instinct is to check within the `drivers/ptp/` directory. That's the most logical place to start, given the nature of the target. Time to fire up my search tools and get this investigation underway. Let's see what that yields!

{
  "Expression": "idtfc3",
  "PathPrefix": "drivers/ptp/"
}

{
  "Output": "\nFull output is too long, showing 500 out of 727 lines.\nUse more precise expression if possible.\n\ndrivers/ptp/ptp_fc3.c=36=module_param(firmware, charp, 0);\ndrivers/ptp/ptp_fc3.c-37-\ndrivers/ptp/ptp_fc3.c:38:static s64 ns2counters(struct idtfc3 *idtfc3, s64 nsec, u32 *sub_ns)\ndrivers/ptp/ptp_fc3.c-39-{\n--\ndrivers/ptp/ptp_fc3.c-43-\tif (likely(nsec \u003e= 0)) {\ndrivers/ptp/ptp_fc3.c:44:\t\tsync = div_u64_rem(nsec, idtfc3-\u003ens_per_sync, \u0026rem);\ndrivers/ptp/ptp_fc3.c-45-\t\t*sub_ns = rem;\ndrivers/ptp/ptp_fc3.c-46-\t} else {\ndrivers/ptp/ptp_fc3.c:47:\t\tsync = -div_u64_rem(-nsec - 1, idtfc3-\u003ens_per_sync, \u0026rem) - 1;\ndrivers/ptp/ptp_fc3.c:48:\t\t*sub_ns = idtfc3-\u003ens_per_sync - rem - 1;\ndrivers/ptp/ptp_fc3.c-49-\t}\ndrivers/ptp/ptp_fc3.c-50-\ndrivers/ptp/ptp_fc3.c:51:\treturn sync * idtfc3-\u003ens_per_sync;\ndrivers/ptp/ptp_fc3.c-52-}\ndrivers/ptp/ptp_fc3.c-53-\ndrivers/ptp/ptp_fc3.c:54:static s64 tdc_meas2offset(struct idtfc3 *idtfc3, u64 meas_read)\ndrivers/ptp/ptp_fc3.c-55-{\n--\ndrivers/ptp/ptp_fc3.c-60-\ndrivers/ptp/ptp_fc3.c:61:\tfine = div64_s64(fine * NSEC_PER_SEC, idtfc3-\u003etdc_apll_freq * 62LL);\ndrivers/ptp/ptp_fc3.c:62:\tcoarse = div64_s64(coarse * NSEC_PER_SEC, idtfc3-\u003etime_ref_freq);\ndrivers/ptp/ptp_fc3.c-63-\n--\ndrivers/ptp/ptp_fc3.c-66-\ndrivers/ptp/ptp_fc3.c:67:static s64 tdc_offset2phase(struct idtfc3 *idtfc3, s64 offset_ns)\ndrivers/ptp/ptp_fc3.c-68-{\ndrivers/ptp/ptp_fc3.c:69:\tif (offset_ns \u003e idtfc3-\u003ens_per_sync / 2)\ndrivers/ptp/ptp_fc3.c:70:\t\toffset_ns -= idtfc3-\u003ens_per_sync;\ndrivers/ptp/ptp_fc3.c-71-\ndrivers/ptp/ptp_fc3.c:72:\treturn offset_ns * idtfc3-\u003etdc_offset_sign;\ndrivers/ptp/ptp_fc3.c-73-}\ndrivers/ptp/ptp_fc3.c-74-\ndrivers/ptp/ptp_fc3.c:75:static int idtfc3_set_lpf_mode(struct idtfc3 *idtfc3, u8 mode)\ndrivers/ptp/ptp_fc3.c-76-{\n--\ndrivers/ptp/ptp_fc3.c-81-\ndrivers/ptp/ptp_fc3.c:82:\tif (idtfc3-\u003elpf_mode == mode)\ndrivers/ptp/ptp_fc3.c-83-\t\treturn 0;\ndrivers/ptp/ptp_fc3.c-84-\ndrivers/ptp/ptp_fc3.c:85:\terr = regmap_bulk_write(idtfc3-\u003eregmap, LPF_MODE_CNFG, \u0026mode, sizeof(mode));\ndrivers/ptp/ptp_fc3.c-86-\tif (err)\n--\ndrivers/ptp/ptp_fc3.c-88-\ndrivers/ptp/ptp_fc3.c:89:\tidtfc3-\u003elpf_mode = mode;\ndrivers/ptp/ptp_fc3.c-90-\n--\ndrivers/ptp/ptp_fc3.c-93-\ndrivers/ptp/ptp_fc3.c:94:static int idtfc3_enable_lpf(struct idtfc3 *idtfc3, bool enable)\ndrivers/ptp/ptp_fc3.c-95-{\n--\ndrivers/ptp/ptp_fc3.c-98-\ndrivers/ptp/ptp_fc3.c:99:\terr = regmap_bulk_read(idtfc3-\u003eregmap, LPF_CTRL, \u0026val, sizeof(val));\ndrivers/ptp/ptp_fc3.c-100-\tif (err)\n--\ndrivers/ptp/ptp_fc3.c-107-\ndrivers/ptp/ptp_fc3.c:108:\treturn regmap_bulk_write(idtfc3-\u003eregmap, LPF_CTRL, \u0026val, sizeof(val));\ndrivers/ptp/ptp_fc3.c-109-}\ndrivers/ptp/ptp_fc3.c-110-\ndrivers/ptp/ptp_fc3.c:111:static int idtfc3_get_time_ref_freq(struct idtfc3 *idtfc3)\ndrivers/ptp/ptp_fc3.c-112-{\n--\ndrivers/ptp/ptp_fc3.c-117-\ndrivers/ptp/ptp_fc3.c:118:\terr = regmap_bulk_read(idtfc3-\u003eregmap, TIME_CLOCK_MEAS_DIV_CNFG, buf, sizeof(buf));\ndrivers/ptp/ptp_fc3.c-119-\tif (err)\n--\ndrivers/ptp/ptp_fc3.c-122-\ndrivers/ptp/ptp_fc3.c:123:\terr = regmap_bulk_read(idtfc3-\u003eregmap, TIME_CLOCK_COUNT, buf, 1);\ndrivers/ptp/ptp_fc3.c-124-\tif (err)\n--\ndrivers/ptp/ptp_fc3.c-126-\ttime_clk_div = (buf[0] \u0026 TIME_CLOCK_COUNT_MASK) + 1;\ndrivers/ptp/ptp_fc3.c:127:\tidtfc3-\u003etime_ref_freq = idtfc3-\u003ehw_param.time_clk_freq *\ndrivers/ptp/ptp_fc3.c-128-\t\t\t\ttime_clk_div / time_ref_div;\n--\ndrivers/ptp/ptp_fc3.c-132-\ndrivers/ptp/ptp_fc3.c:133:static int idtfc3_get_tdc_offset_sign(struct idtfc3 *idtfc3)\ndrivers/ptp/ptp_fc3.c-134-{\n--\ndrivers/ptp/ptp_fc3.c-139-\ndrivers/ptp/ptp_fc3.c:140:\terr = regmap_bulk_read(idtfc3-\u003eregmap, TIME_CLOCK_TDC_FANOUT_CNFG, buf, sizeof(buf));\ndrivers/ptp/ptp_fc3.c-141-\tif (err)\n--\ndrivers/ptp/ptp_fc3.c-145-\tif ((val \u0026 TIME_SYNC_TO_TDC_EN) != TIME_SYNC_TO_TDC_EN) {\ndrivers/ptp/ptp_fc3.c:146:\t\tdev_err(idtfc3-\u003edev, \"TIME_SYNC_TO_TDC_EN is off !!!\");\ndrivers/ptp/ptp_fc3.c-147-\t\treturn -EINVAL;\n--\ndrivers/ptp/ptp_fc3.c-153-\tif ((sig1 == sig2) || ((sig1 != TIME_SYNC) \u0026\u0026 (sig2 != TIME_SYNC))) {\ndrivers/ptp/ptp_fc3.c:154:\t\tdev_err(idtfc3-\u003edev, \"Invalid tdc_mux_sel sig1=%d sig2=%d\", sig1, sig2);\ndrivers/ptp/ptp_fc3.c-155-\t\treturn -EINVAL;\ndrivers/ptp/ptp_fc3.c-156-\t} else if (sig1 == TIME_SYNC) {\ndrivers/ptp/ptp_fc3.c:157:\t\tidtfc3-\u003etdc_offset_sign = 1;\ndrivers/ptp/ptp_fc3.c-158-\t} else if (sig2 == TIME_SYNC) {\ndrivers/ptp/ptp_fc3.c:159:\t\tidtfc3-\u003etdc_offset_sign = -1;\ndrivers/ptp/ptp_fc3.c-160-\t}\n--\ndrivers/ptp/ptp_fc3.c-164-\ndrivers/ptp/ptp_fc3.c:165:static int idtfc3_lpf_bw(struct idtfc3 *idtfc3, u8 shift, u8 mult)\ndrivers/ptp/ptp_fc3.c-166-{\n--\ndrivers/ptp/ptp_fc3.c-168-\ndrivers/ptp/ptp_fc3.c:169:\treturn regmap_bulk_write(idtfc3-\u003eregmap, LPF_BW_CNFG, \u0026val, sizeof(val));\ndrivers/ptp/ptp_fc3.c-170-}\ndrivers/ptp/ptp_fc3.c-171-\ndrivers/ptp/ptp_fc3.c:172:static int idtfc3_enable_tdc(struct idtfc3 *idtfc3, bool enable, u8 meas_mode)\ndrivers/ptp/ptp_fc3.c-173-{\n--\ndrivers/ptp/ptp_fc3.c-177-\t/* Disable TDC first */\ndrivers/ptp/ptp_fc3.c:178:\terr = regmap_bulk_write(idtfc3-\u003eregmap, TIME_CLOCK_MEAS_CTRL, \u0026val, sizeof(val));\ndrivers/ptp/ptp_fc3.c-179-\tif (err)\n--\ndrivers/ptp/ptp_fc3.c-182-\tif (enable == false)\ndrivers/ptp/ptp_fc3.c:183:\t\treturn idtfc3_lpf_bw(idtfc3, LPF_BW_SHIFT_DEFAULT, LPF_BW_MULT_DEFAULT);\ndrivers/ptp/ptp_fc3.c-184-\n--\ndrivers/ptp/ptp_fc3.c-188-\t/* Change TDC meas mode */\ndrivers/ptp/ptp_fc3.c:189:\terr = regmap_bulk_write(idtfc3-\u003eregmap, TIME_CLOCK_MEAS_CNFG,\ndrivers/ptp/ptp_fc3.c-190-\t\t\t\t\u0026meas_mode, sizeof(meas_mode));\n--\ndrivers/ptp/ptp_fc3.c-197-\t\tval |= TDC_MEAS_START;\ndrivers/ptp/ptp_fc3.c:198:\terr = regmap_bulk_write(idtfc3-\u003eregmap, TIME_CLOCK_MEAS_CTRL, \u0026val, sizeof(val));\ndrivers/ptp/ptp_fc3.c-199-\tif (err)\n--\ndrivers/ptp/ptp_fc3.c-201-\ndrivers/ptp/ptp_fc3.c:202:\treturn idtfc3_lpf_bw(idtfc3, LPF_BW_SHIFT_1PPS, LPF_BW_MULT_DEFAULT);\ndrivers/ptp/ptp_fc3.c-203-}\ndrivers/ptp/ptp_fc3.c-204-\ndrivers/ptp/ptp_fc3.c:205:static bool get_tdc_meas(struct idtfc3 *idtfc3, s64 *offset_ns)\ndrivers/ptp/ptp_fc3.c-206-{\n--\ndrivers/ptp/ptp_fc3.c-212-\twhile (true) {\ndrivers/ptp/ptp_fc3.c:213:\t\terr = regmap_bulk_read(idtfc3-\u003eregmap, TDC_FIFO_STS,\ndrivers/ptp/ptp_fc3.c-214-\t\t\t\t       \u0026val, sizeof(val));\n--\ndrivers/ptp/ptp_fc3.c-220-\ndrivers/ptp/ptp_fc3.c:221:\t\terr = regmap_bulk_read(idtfc3-\u003eregmap, TDC_FIFO_READ_REQ,\ndrivers/ptp/ptp_fc3.c-222-\t\t\t\t       \u0026buf, sizeof(buf));\n--\ndrivers/ptp/ptp_fc3.c-229-\tif (valid)\ndrivers/ptp/ptp_fc3.c:230:\t\t*offset_ns = tdc_meas2offset(idtfc3, get_unaligned_le64(\u0026buf[1]));\ndrivers/ptp/ptp_fc3.c-231-\n--\ndrivers/ptp/ptp_fc3.c-234-\ndrivers/ptp/ptp_fc3.c:235:static int check_tdc_fifo_overrun(struct idtfc3 *idtfc3)\ndrivers/ptp/ptp_fc3.c-236-{\n--\ndrivers/ptp/ptp_fc3.c-240-\t/* Check if FIFO is overrun */\ndrivers/ptp/ptp_fc3.c:241:\terr = regmap_bulk_read(idtfc3-\u003eregmap, TDC_FIFO_STS, \u0026val, sizeof(val));\ndrivers/ptp/ptp_fc3.c-242-\tif (err)\n--\ndrivers/ptp/ptp_fc3.c-247-\ndrivers/ptp/ptp_fc3.c:248:\tdev_warn(idtfc3-\u003edev, \"TDC FIFO overrun !!!\");\ndrivers/ptp/ptp_fc3.c-249-\ndrivers/ptp/ptp_fc3.c:250:\terr = idtfc3_enable_tdc(idtfc3, true, CONTINUOUS);\ndrivers/ptp/ptp_fc3.c-251-\tif (err)\n--\ndrivers/ptp/ptp_fc3.c-256-\ndrivers/ptp/ptp_fc3.c:257:static int get_tdc_meas_continuous(struct idtfc3 *idtfc3)\ndrivers/ptp/ptp_fc3.c-258-{\n--\ndrivers/ptp/ptp_fc3.c-262-\ndrivers/ptp/ptp_fc3.c:263:\terr = check_tdc_fifo_overrun(idtfc3);\ndrivers/ptp/ptp_fc3.c-264-\tif (err)\n--\ndrivers/ptp/ptp_fc3.c-266-\ndrivers/ptp/ptp_fc3.c:267:\tif (get_tdc_meas(idtfc3, \u0026offset_ns) \u0026\u0026 offset_ns \u003e= 0) {\ndrivers/ptp/ptp_fc3.c-268-\t\tevent.index = 0;\ndrivers/ptp/ptp_fc3.c:269:\t\tevent.offset = tdc_offset2phase(idtfc3, offset_ns);\ndrivers/ptp/ptp_fc3.c-270-\t\tevent.type = PTP_CLOCK_EXTOFF;\ndrivers/ptp/ptp_fc3.c:271:\t\tptp_clock_event(idtfc3-\u003eptp_clock, \u0026event);\ndrivers/ptp/ptp_fc3.c-272-\t}\n--\ndrivers/ptp/ptp_fc3.c-276-\ndrivers/ptp/ptp_fc3.c:277:static int idtfc3_read_subcounter(struct idtfc3 *idtfc3)\ndrivers/ptp/ptp_fc3.c-278-{\n--\ndrivers/ptp/ptp_fc3.c-281-\ndrivers/ptp/ptp_fc3.c:282:\terr = regmap_bulk_read(idtfc3-\u003eregmap, TOD_COUNTER_READ_REQ,\ndrivers/ptp/ptp_fc3.c-283-\t\t\t       \u0026buf, sizeof(buf));\n--\ndrivers/ptp/ptp_fc3.c-290-\ndrivers/ptp/ptp_fc3.c:291:static int idtfc3_tod_update_is_done(struct idtfc3 *idtfc3)\ndrivers/ptp/ptp_fc3.c-292-{\n--\ndrivers/ptp/ptp_fc3.c-296-\terr = read_poll_timeout_atomic(regmap_bulk_read, err, !req, USEC_PER_MSEC,\ndrivers/ptp/ptp_fc3.c:297:\t\t\t\t       idtfc3-\u003etc_write_timeout, true, idtfc3-\u003eregmap,\ndrivers/ptp/ptp_fc3.c-298-\t\t\t\t       TOD_SYNC_LOAD_REQ_CTRL, \u0026req, 1);\ndrivers/ptp/ptp_fc3.c-299-\tif (err)\ndrivers/ptp/ptp_fc3.c:300:\t\tdev_err(idtfc3-\u003edev, \"TOD counter write timeout !!!\");\ndrivers/ptp/ptp_fc3.c-301-\n--\ndrivers/ptp/ptp_fc3.c-304-\ndrivers/ptp/ptp_fc3.c:305:static int idtfc3_write_subcounter(struct idtfc3 *idtfc3, u32 counter)\ndrivers/ptp/ptp_fc3.c-306-{\n--\ndrivers/ptp/ptp_fc3.c-315-\ndrivers/ptp/ptp_fc3.c:316:\terr = regmap_bulk_write(idtfc3-\u003eregmap, TOD_SYNC_LOAD_VAL_CTRL,\ndrivers/ptp/ptp_fc3.c-317-\t\t\t\t\u0026buf, sizeof(buf));\n--\ndrivers/ptp/ptp_fc3.c-320-\ndrivers/ptp/ptp_fc3.c:321:\treturn idtfc3_tod_update_is_done(idtfc3);\ndrivers/ptp/ptp_fc3.c-322-}\ndrivers/ptp/ptp_fc3.c-323-\ndrivers/ptp/ptp_fc3.c:324:static int idtfc3_timecounter_update(struct idtfc3 *idtfc3, u32 counter, s64 ns)\ndrivers/ptp/ptp_fc3.c-325-{\n--\ndrivers/ptp/ptp_fc3.c-327-\ndrivers/ptp/ptp_fc3.c:328:\terr = idtfc3_write_subcounter(idtfc3, counter);\ndrivers/ptp/ptp_fc3.c-329-\tif (err)\n--\ndrivers/ptp/ptp_fc3.c-332-\t/* Update time counter */\ndrivers/ptp/ptp_fc3.c:333:\tidtfc3-\u003ens = ns;\ndrivers/ptp/ptp_fc3.c:334:\tidtfc3-\u003elast_counter = counter;\ndrivers/ptp/ptp_fc3.c-335-\n--\ndrivers/ptp/ptp_fc3.c-338-\ndrivers/ptp/ptp_fc3.c:339:static int idtfc3_timecounter_read(struct idtfc3 *idtfc3)\ndrivers/ptp/ptp_fc3.c-340-{\n--\ndrivers/ptp/ptp_fc3.c-342-\ndrivers/ptp/ptp_fc3.c:343:\tnow = idtfc3_read_subcounter(idtfc3);\ndrivers/ptp/ptp_fc3.c-344-\tif (now \u003c 0)\n--\ndrivers/ptp/ptp_fc3.c-346-\ndrivers/ptp/ptp_fc3.c:347:\t/* calculate the delta since the last idtfc3_timecounter_read(): */\ndrivers/ptp/ptp_fc3.c:348:\tif (now \u003e= idtfc3-\u003elast_counter)\ndrivers/ptp/ptp_fc3.c:349:\t\tdelta = now - idtfc3-\u003elast_counter;\ndrivers/ptp/ptp_fc3.c-350-\telse\ndrivers/ptp/ptp_fc3.c:351:\t\tdelta = idtfc3-\u003esub_sync_count - idtfc3-\u003elast_counter + now;\ndrivers/ptp/ptp_fc3.c-352-\ndrivers/ptp/ptp_fc3.c-353-\t/* Update time counter */\ndrivers/ptp/ptp_fc3.c:354:\tidtfc3-\u003ens += delta * idtfc3-\u003ens_per_counter;\ndrivers/ptp/ptp_fc3.c:355:\tidtfc3-\u003elast_counter = now;\ndrivers/ptp/ptp_fc3.c-356-\n--\ndrivers/ptp/ptp_fc3.c-359-\ndrivers/ptp/ptp_fc3.c:360:static int _idtfc3_gettime(struct idtfc3 *idtfc3, struct timespec64 *ts)\ndrivers/ptp/ptp_fc3.c-361-{\n--\ndrivers/ptp/ptp_fc3.c-363-\ndrivers/ptp/ptp_fc3.c:364:\terr = idtfc3_timecounter_read(idtfc3);\ndrivers/ptp/ptp_fc3.c-365-\tif (err)\n--\ndrivers/ptp/ptp_fc3.c-367-\ndrivers/ptp/ptp_fc3.c:368:\t*ts = ns_to_timespec64(idtfc3-\u003ens);\ndrivers/ptp/ptp_fc3.c-369-\n--\ndrivers/ptp/ptp_fc3.c-372-\ndrivers/ptp/ptp_fc3.c:373:static int idtfc3_gettime(struct ptp_clock_info *ptp, struct timespec64 *ts)\ndrivers/ptp/ptp_fc3.c-374-{\ndrivers/ptp/ptp_fc3.c:375:\tstruct idtfc3 *idtfc3 = container_of(ptp, struct idtfc3, caps);\ndrivers/ptp/ptp_fc3.c-376-\tint err;\ndrivers/ptp/ptp_fc3.c-377-\ndrivers/ptp/ptp_fc3.c:378:\tmutex_lock(idtfc3-\u003elock);\ndrivers/ptp/ptp_fc3.c:379:\terr = _idtfc3_gettime(idtfc3, ts);\ndrivers/ptp/ptp_fc3.c:380:\tmutex_unlock(idtfc3-\u003elock);\ndrivers/ptp/ptp_fc3.c-381-\n--\ndrivers/ptp/ptp_fc3.c-384-\ndrivers/ptp/ptp_fc3.c:385:static int _idtfc3_settime(struct idtfc3 *idtfc3, const struct timespec64 *ts)\ndrivers/ptp/ptp_fc3.c-386-{\n--\ndrivers/ptp/ptp_fc3.c-391-\tif (timespec64_valid(ts) == false) {\ndrivers/ptp/ptp_fc3.c:392:\t\tdev_err(idtfc3-\u003edev, \"%s: invalid timespec\", __func__);\ndrivers/ptp/ptp_fc3.c-393-\t\treturn -EINVAL;\n--\ndrivers/ptp/ptp_fc3.c-395-\ndrivers/ptp/ptp_fc3.c:396:\tnow = idtfc3_read_subcounter(idtfc3);\ndrivers/ptp/ptp_fc3.c-397-\tif (now \u003c 0)\n--\ndrivers/ptp/ptp_fc3.c-399-\ndrivers/ptp/ptp_fc3.c:400:\toffset_ns = (idtfc3-\u003esub_sync_count - now) * idtfc3-\u003ens_per_counter;\ndrivers/ptp/ptp_fc3.c-401-\tnow_ns = timespec64_to_ns(ts);\ndrivers/ptp/ptp_fc3.c:402:\t(void)ns2counters(idtfc3, offset_ns + now_ns, \u0026sub_ns);\ndrivers/ptp/ptp_fc3.c-403-\ndrivers/ptp/ptp_fc3.c:404:\tcounter = sub_ns / idtfc3-\u003ens_per_counter;\ndrivers/ptp/ptp_fc3.c:405:\treturn idtfc3_timecounter_update(idtfc3, counter, now_ns);\ndrivers/ptp/ptp_fc3.c-406-}\ndrivers/ptp/ptp_fc3.c-407-\ndrivers/ptp/ptp_fc3.c:408:static int idtfc3_settime(struct ptp_clock_info *ptp, const struct timespec64 *ts)\ndrivers/ptp/ptp_fc3.c-409-{\ndrivers/ptp/ptp_fc3.c:410:\tstruct idtfc3 *idtfc3 = container_of(ptp, struct idtfc3, caps);\ndrivers/ptp/ptp_fc3.c-411-\tint err;\ndrivers/ptp/ptp_fc3.c-412-\ndrivers/ptp/ptp_fc3.c:413:\tmutex_lock(idtfc3-\u003elock);\ndrivers/ptp/ptp_fc3.c:414:\terr = _idtfc3_settime(idtfc3, ts);\ndrivers/ptp/ptp_fc3.c:415:\tmutex_unlock(idtfc3-\u003elock);\ndrivers/ptp/ptp_fc3.c-416-\n--\ndrivers/ptp/ptp_fc3.c-419-\ndrivers/ptp/ptp_fc3.c:420:static int _idtfc3_adjtime(struct idtfc3 *idtfc3, s64 delta)\ndrivers/ptp/ptp_fc3.c-421-{\n--\ndrivers/ptp/ptp_fc3.c-429-\ndrivers/ptp/ptp_fc3.c:430:\tif (idtfc3-\u003ens + delta \u003c 0) {\ndrivers/ptp/ptp_fc3.c:431:\t\tdev_err(idtfc3-\u003edev, \"%lld ns adj is too large\", delta);\ndrivers/ptp/ptp_fc3.c-432-\t\treturn -EINVAL;\n--\ndrivers/ptp/ptp_fc3.c-434-\ndrivers/ptp/ptp_fc3.c:435:\tsync_ns = ns2counters(idtfc3, delta + idtfc3-\u003ens_per_sync, \u0026sub_ns);\ndrivers/ptp/ptp_fc3.c-436-\ndrivers/ptp/ptp_fc3.c:437:\tcounter = sub_ns / idtfc3-\u003ens_per_counter;\ndrivers/ptp/ptp_fc3.c:438:\treturn idtfc3_timecounter_update(idtfc3, counter, idtfc3-\u003ens + sync_ns +\ndrivers/ptp/ptp_fc3.c:439:\t\t\t\t\t\t\t\t\tcounter * idtfc3-\u003ens_per_counter);\ndrivers/ptp/ptp_fc3.c-440-}\ndrivers/ptp/ptp_fc3.c-441-\ndrivers/ptp/ptp_fc3.c:442:static int idtfc3_adjtime(struct ptp_clock_info *ptp, s64 delta)\ndrivers/ptp/ptp_fc3.c-443-{\ndrivers/ptp/ptp_fc3.c:444:\tstruct idtfc3 *idtfc3 = container_of(ptp, struct idtfc3, caps);\ndrivers/ptp/ptp_fc3.c-445-\tint err;\ndrivers/ptp/ptp_fc3.c-446-\ndrivers/ptp/ptp_fc3.c:447:\tmutex_lock(idtfc3-\u003elock);\ndrivers/ptp/ptp_fc3.c:448:\terr = _idtfc3_adjtime(idtfc3, delta);\ndrivers/ptp/ptp_fc3.c:449:\tmutex_unlock(idtfc3-\u003elock);\ndrivers/ptp/ptp_fc3.c-450-\n--\ndrivers/ptp/ptp_fc3.c-453-\ndrivers/ptp/ptp_fc3.c:454:static int _idtfc3_adjphase(struct idtfc3 *idtfc3, s32 delta)\ndrivers/ptp/ptp_fc3.c-455-{\n--\ndrivers/ptp/ptp_fc3.c-459-\ndrivers/ptp/ptp_fc3.c:460:\terr = idtfc3_set_lpf_mode(idtfc3, LPF_WP);\ndrivers/ptp/ptp_fc3.c-461-\tif (err)\n--\ndrivers/ptp/ptp_fc3.c-471-\t */\ndrivers/ptp/ptp_fc3.c:472:\tpcw = div_s64((s64)delta * idtfc3-\u003etdc_apll_freq * 124, NSEC_PER_SEC);\ndrivers/ptp/ptp_fc3.c-473-\n--\ndrivers/ptp/ptp_fc3.c-475-\ndrivers/ptp/ptp_fc3.c:476:\treturn regmap_bulk_write(idtfc3-\u003eregmap, LPF_WR_PHASE_CTRL, buf, sizeof(buf));\ndrivers/ptp/ptp_fc3.c-477-}\ndrivers/ptp/ptp_fc3.c-478-\ndrivers/ptp/ptp_fc3.c:479:static int idtfc3_adjphase(struct ptp_clock_info *ptp, s32 delta)\ndrivers/ptp/ptp_fc3.c-480-{\ndrivers/ptp/ptp_fc3.c:481:\tstruct idtfc3 *idtfc3 = container_of(ptp, struct idtfc3, caps);\ndrivers/ptp/ptp_fc3.c-482-\tint err;\ndrivers/ptp/ptp_fc3.c-483-\ndrivers/ptp/ptp_fc3.c:484:\tmutex_lock(idtfc3-\u003elock);\ndrivers/ptp/ptp_fc3.c:485:\terr = _idtfc3_adjphase(idtfc3, delta);\ndrivers/ptp/ptp_fc3.c:486:\tmutex_unlock(idtfc3-\u003elock);\ndrivers/ptp/ptp_fc3.c-487-\n--\ndrivers/ptp/ptp_fc3.c-490-\ndrivers/ptp/ptp_fc3.c:491:static int _idtfc3_adjfine(struct idtfc3 *idtfc3, long scaled_ppm)\ndrivers/ptp/ptp_fc3.c-492-{\n--\ndrivers/ptp/ptp_fc3.c-496-\ndrivers/ptp/ptp_fc3.c:497:\terr = idtfc3_set_lpf_mode(idtfc3, LPF_WF);\ndrivers/ptp/ptp_fc3.c-498-\tif (err)\n--\ndrivers/ptp/ptp_fc3.c-518-\ndrivers/ptp/ptp_fc3.c:519:\treturn regmap_bulk_write(idtfc3-\u003eregmap, LPF_WR_FREQ_CTRL, buf, sizeof(buf));\ndrivers/ptp/ptp_fc3.c-520-}\ndrivers/ptp/ptp_fc3.c-521-\ndrivers/ptp/ptp_fc3.c:522:static int idtfc3_adjfine(struct ptp_clock_info *ptp, long scaled_ppm)\ndrivers/ptp/ptp_fc3.c-523-{\ndrivers/ptp/ptp_fc3.c:524:\tstruct idtfc3 *idtfc3 = container_of(ptp, struct idtfc3, caps);\ndrivers/ptp/ptp_fc3.c-525-\tint err;\ndrivers/ptp/ptp_fc3.c-526-\ndrivers/ptp/ptp_fc3.c:527:\tmutex_lock(idtfc3-\u003elock);\ndrivers/ptp/ptp_fc3.c:528:\terr = _idtfc3_adjfine(idtfc3, scaled_ppm);\ndrivers/ptp/ptp_fc3.c:529:\tmutex_unlock(idtfc3-\u003elock);\ndrivers/ptp/ptp_fc3.c-530-\n--\ndrivers/ptp/ptp_fc3.c-533-\ndrivers/ptp/ptp_fc3.c:534:static int idtfc3_enable(struct ptp_clock_info *ptp,\ndrivers/ptp/ptp_fc3.c-535-\t\t\t struct ptp_clock_request *rq, int on)\ndrivers/ptp/ptp_fc3.c-536-{\ndrivers/ptp/ptp_fc3.c:537:\tstruct idtfc3 *idtfc3 = container_of(ptp, struct idtfc3, caps);\ndrivers/ptp/ptp_fc3.c-538-\tint err = -EOPNOTSUPP;\ndrivers/ptp/ptp_fc3.c-539-\ndrivers/ptp/ptp_fc3.c:540:\tmutex_lock(idtfc3-\u003elock);\ndrivers/ptp/ptp_fc3.c-541-\tswitch (rq-\u003etype) {\n--\ndrivers/ptp/ptp_fc3.c-557-\t\t\telse\ndrivers/ptp/ptp_fc3.c:558:\t\t\t\terr = idtfc3_enable_tdc(idtfc3, true, CONTINUOUS);\ndrivers/ptp/ptp_fc3.c-559-\t\t} else {\ndrivers/ptp/ptp_fc3.c:560:\t\t\terr = idtfc3_enable_tdc(idtfc3, false, MEAS_MODE_INVALID);\ndrivers/ptp/ptp_fc3.c-561-\t\t}\n--\ndrivers/ptp/ptp_fc3.c-565-\t}\ndrivers/ptp/ptp_fc3.c:566:\tmutex_unlock(idtfc3-\u003elock);\ndrivers/ptp/ptp_fc3.c-567-\ndrivers/ptp/ptp_fc3.c-568-\tif (err)\ndrivers/ptp/ptp_fc3.c:569:\t\tdev_err(idtfc3-\u003edev, \"Failed in %s with err %d!\", __func__, err);\ndrivers/ptp/ptp_fc3.c-570-\n--\ndrivers/ptp/ptp_fc3.c-573-\ndrivers/ptp/ptp_fc3.c:574:static long idtfc3_aux_work(struct ptp_clock_info *ptp)\ndrivers/ptp/ptp_fc3.c-575-{\ndrivers/ptp/ptp_fc3.c:576:\tstruct idtfc3 *idtfc3 = container_of(ptp, struct idtfc3, caps);\ndrivers/ptp/ptp_fc3.c-577-\tstatic int tdc_get;\ndrivers/ptp/ptp_fc3.c-578-\ndrivers/ptp/ptp_fc3.c:579:\tmutex_lock(idtfc3-\u003elock);\ndrivers/ptp/ptp_fc3.c-580-\ttdc_get %= TDC_GET_PERIOD;\ndrivers/ptp/ptp_fc3.c-581-\tif ((tdc_get == 0) || (tdc_get == TDC_GET_PERIOD / 2))\ndrivers/ptp/ptp_fc3.c:582:\t\tidtfc3_timecounter_read(idtfc3);\ndrivers/ptp/ptp_fc3.c:583:\tget_tdc_meas_continuous(idtfc3);\ndrivers/ptp/ptp_fc3.c-584-\ttdc_get++;\ndrivers/ptp/ptp_fc3.c:585:\tmutex_unlock(idtfc3-\u003elock);\ndrivers/ptp/ptp_fc3.c-586-\ndrivers/ptp/ptp_fc3.c:587:\treturn idtfc3-\u003etc_update_period;\ndrivers/ptp/ptp_fc3.c-588-}\ndrivers/ptp/ptp_fc3.c-589-\ndrivers/ptp/ptp_fc3.c:590:static const struct ptp_clock_info idtfc3_caps = {\ndrivers/ptp/ptp_fc3.c-591-\t.owner\t\t= THIS_MODULE,\n--\ndrivers/ptp/ptp_fc3.c-595-\t.supported_extts_flags = PTP_STRICT_FLAGS | PTP_EXT_OFFSET,\ndrivers/ptp/ptp_fc3.c:596:\t.adjphase\t= \u0026idtfc3_adjphase,\ndrivers/ptp/ptp_fc3.c:597:\t.adjfine\t= \u0026idtfc3_adjfine,\ndrivers/ptp/ptp_fc3.c:598:\t.adjtime\t= \u0026idtfc3_adjtime,\ndrivers/ptp/ptp_fc3.c:599:\t.gettime64\t= \u0026idtfc3_gettime,\ndrivers/ptp/ptp_fc3.c:600:\t.settime64\t= \u0026idtfc3_settime,\ndrivers/ptp/ptp_fc3.c:601:\t.enable\t\t= \u0026idtfc3_enable,\ndrivers/ptp/ptp_fc3.c:602:\t.do_aux_work\t= \u0026idtfc3_aux_work,\ndrivers/ptp/ptp_fc3.c-603-};\ndrivers/ptp/ptp_fc3.c-604-\ndrivers/ptp/ptp_fc3.c:605:static int idtfc3_hw_calibrate(struct idtfc3 *idtfc3)\ndrivers/ptp/ptp_fc3.c-606-{\n--\ndrivers/ptp/ptp_fc3.c-617-\tval = TDC_EN;\ndrivers/ptp/ptp_fc3.c:618:\terr = regmap_bulk_write(idtfc3-\u003eregmap, TDC_CTRL,\ndrivers/ptp/ptp_fc3.c-619-\t\t\t\t\u0026val, sizeof(val));\n--\ndrivers/ptp/ptp_fc3.c-622-\tval = TDC_EN | TDC_DAC_RECAL_REQ;\ndrivers/ptp/ptp_fc3.c:623:\terr = regmap_bulk_write(idtfc3-\u003eregmap, TDC_CTRL,\ndrivers/ptp/ptp_fc3.c-624-\t\t\t\t\u0026val, sizeof(val));\n--\ndrivers/ptp/ptp_fc3.c-634-\tval = 0;\ndrivers/ptp/ptp_fc3.c:635:\terr = regmap_bulk_write(idtfc3-\u003eregmap, SOFT_RESET_CTRL,\ndrivers/ptp/ptp_fc3.c-636-\t\t\t\t\u0026val, sizeof(val));\n--\ndrivers/ptp/ptp_fc3.c-639-\tval = APLL_REINIT;\ndrivers/ptp/ptp_fc3.c:640:\terr = regmap_bulk_write(idtfc3-\u003eregmap, SOFT_RESET_CTRL,\ndrivers/ptp/ptp_fc3.c-641-\t\t\t\t\u0026val, sizeof(val));\n--\ndrivers/ptp/ptp_fc3.c-648-\ndrivers/ptp/ptp_fc3.c:649:static int idtfc3_init_timecounter(struct idtfc3 *idtfc3)\ndrivers/ptp/ptp_fc3.c-650-{\n--\ndrivers/ptp/ptp_fc3.c-653-\ndrivers/ptp/ptp_fc3.c:654:\tperiod_ms = idtfc3-\u003esub_sync_count * MSEC_PER_SEC /\ndrivers/ptp/ptp_fc3.c:655:\t\t\tidtfc3-\u003ehw_param.time_clk_freq;\ndrivers/ptp/ptp_fc3.c-656-\ndrivers/ptp/ptp_fc3.c:657:\tidtfc3-\u003etc_update_period = msecs_to_jiffies(period_ms / TDC_GET_PERIOD);\ndrivers/ptp/ptp_fc3.c:658:\tidtfc3-\u003etc_write_timeout = period_ms * USEC_PER_MSEC;\ndrivers/ptp/ptp_fc3.c-659-\ndrivers/ptp/ptp_fc3.c:660:\terr = idtfc3_timecounter_update(idtfc3, 0, 0);\ndrivers/ptp/ptp_fc3.c-661-\tif (err)\n--\ndrivers/ptp/ptp_fc3.c-663-\ndrivers/ptp/ptp_fc3.c:664:\terr = idtfc3_timecounter_read(idtfc3);\ndrivers/ptp/ptp_fc3.c-665-\tif (err)\n--\ndrivers/ptp/ptp_fc3.c-670-\ndrivers/ptp/ptp_fc3.c:671:static int idtfc3_get_tdc_apll_freq(struct idtfc3 *idtfc3)\ndrivers/ptp/ptp_fc3.c-672-{\n--\ndrivers/ptp/ptp_fc3.c-675-\tu8 tdc_ref_div;\ndrivers/ptp/ptp_fc3.c:676:\tstruct idtfc3_hw_param *param = \u0026idtfc3-\u003ehw_param;\ndrivers/ptp/ptp_fc3.c-677-\ndrivers/ptp/ptp_fc3.c:678:\terr = regmap_bulk_read(idtfc3-\u003eregmap, TDC_REF_DIV_CNFG,\ndrivers/ptp/ptp_fc3.c-679-\t\t\t\t\u0026tdc_ref_div, sizeof(tdc_ref_div));\n--\ndrivers/ptp/ptp_fc3.c-682-\ndrivers/ptp/ptp_fc3.c:683:\terr = regmap_bulk_read(idtfc3-\u003eregmap, TDC_FB_DIV_INT_CNFG,\ndrivers/ptp/ptp_fc3.c-684-\t\t\t\t\u0026tdc_fb_div_int, sizeof(tdc_fb_div_int));\n--\ndrivers/ptp/ptp_fc3.c-690-\ndrivers/ptp/ptp_fc3.c:691:\tidtfc3-\u003etdc_apll_freq = div_u64(param-\u003extal_freq * (u64)tdc_fb_div_int,\ndrivers/ptp/ptp_fc3.c-692-\t\t\t\t\t1 \u003c\u003c tdc_ref_div);\n--\ndrivers/ptp/ptp_fc3.c-696-\ndrivers/ptp/ptp_fc3.c:697:static int idtfc3_get_fod(struct idtfc3 *idtfc3)\ndrivers/ptp/ptp_fc3.c-698-{\n--\ndrivers/ptp/ptp_fc3.c-701-\ndrivers/ptp/ptp_fc3.c:702:\terr = regmap_bulk_read(idtfc3-\u003eregmap, TIME_CLOCK_SRC, \u0026fod, sizeof(fod));\ndrivers/ptp/ptp_fc3.c-703-\tif (err)\n--\ndrivers/ptp/ptp_fc3.c-707-\tcase 0:\ndrivers/ptp/ptp_fc3.c:708:\t\tidtfc3-\u003efod_n = FOD_0;\ndrivers/ptp/ptp_fc3.c-709-\t\tbreak;\ndrivers/ptp/ptp_fc3.c-710-\tcase 1:\ndrivers/ptp/ptp_fc3.c:711:\t\tidtfc3-\u003efod_n = FOD_1;\ndrivers/ptp/ptp_fc3.c-712-\t\tbreak;\ndrivers/ptp/ptp_fc3.c-713-\tcase 2:\ndrivers/ptp/ptp_fc3.c:714:\t\tidtfc3-\u003efod_n = FOD_2;\ndrivers/ptp/ptp_fc3.c-715-\t\tbreak;\n--\ndrivers/ptp/ptp_fc3.c-722-\ndrivers/ptp/ptp_fc3.c:723:static int idtfc3_get_sync_count(struct idtfc3 *idtfc3)\ndrivers/ptp/ptp_fc3.c-724-{\n--\ndrivers/ptp/ptp_fc3.c-727-\ndrivers/ptp/ptp_fc3.c:728:\terr = regmap_bulk_read(idtfc3-\u003eregmap, SUB_SYNC_GEN_CNFG, buf, sizeof(buf));\ndrivers/ptp/ptp_fc3.c-729-\tif (err)\n--\ndrivers/ptp/ptp_fc3.c-731-\ndrivers/ptp/ptp_fc3.c:732:\tidtfc3-\u003esub_sync_count = (get_unaligned_le32(buf) \u0026 SUB_SYNC_COUNTER_MASK) + 1;\ndrivers/ptp/ptp_fc3.c:733:\tidtfc3-\u003ens_per_counter = NSEC_PER_SEC / idtfc3-\u003ehw_param.time_clk_freq;\n\n"
}

gemini-3.1-pro-preview

null

null

							input: 31483
							output: 29
							thoughts: 62
						

Okay, let's see... this driver, is it I2C, or SPI based? No, hang on... this is a platform driver, isn't it? Right. Okay. So, if it's a platform driver, the next thing I need to investigate is whether it's instantiated by an MFD driver. It usually is. Now, where have I seen something similar before? Let's check the `drivers/mfd/` directory. Hmm, could be something like an `rsmu*` prefix, or perhaps an `idt*` one? That sounds about right.

no matches

{
  "Expression": "rc38xxx",
  "PathPrefix": "drivers/mfd/"
}

{
  "error": "no matches"
}

gemini-3.1-pro-preview

null

null

							input: 31714
							output: 28
							thoughts: 17
						

Here's my thought process, as if I were considering this issue:

**Investigating the IDTFC3 Driver**

Okay, so I need to track down the `idtfc3` driver. My first instinct, given its likely functionality as a mixed-function device, is to head directly to the `drivers/mfd/` directory. That's usually the go-to place for these types of devices in the kernel. Let's see what's in there. I bet it's there. And if it's *not* there, I'll have a better idea of where to look next, depending on the architecture or device type!

no matches

{
  "Expression": "idtfc3",
  "PathPrefix": "drivers/mfd/"
}

{
  "error": "no matches"
}

gemini-3.1-pro-preview

null

null

							input: 31913
							output: 27
							thoughts: 29
						

Okay, here's my interpretation of that thought process, from an expert's perspective:

**Diving into the Platform Architecture**

Alright, I need to understand this platform device – how it's actually instantiated. It's not immediately obvious from the current context. My immediate instinct, given the naming convention, is that it involves some kind of dedicated hardware component or driver. Let's see... what's this `rc38xxx-phc` thing? I'll bet it's the key. Time to get my hands dirty. I'll need to use my usual methods, and start with a deep dive search. The quickest way to understand this is to grep the source code tree. Let's start the search with `rc38xxx-phc`. I need to figure out where this device is declared, initialized, and ultimately, how it's integrated with the rest of the system. Let's see where that takes us.

{
  "Expression": "rc38xxx-phc",
  "PathPrefix": ""
}

{
  "Output": "drivers/ptp/ptp_fc3.c=1002=static struct platform_driver idtfc3_driver = {\ndrivers/ptp/ptp_fc3.c-1003-\t.driver = {\ndrivers/ptp/ptp_fc3.c:1004:\t\t.name = \"rc38xxx-phc\",\ndrivers/ptp/ptp_fc3.c-1005-\t},\n"
}

gemini-3.1-pro-preview

null

null

							input: 32292
							output: 24
							thoughts: 26
						

Okay, here's my take on those thoughts, framed as an expert's internal monologue:

**Investigating the Origin of `rc38xxx`**

Hmm, so the build process isn't explicitly *creating* `rc38xxx` anywhere I can immediately see. That's unusual. It suggests it might be a generated artifact, pulled in from an external dependency, or perhaps even referenced indirectly through some clever configuration. It could also mean there's a problem in the build system's setup. Okay, time to go nuclear. I need to get a complete picture. Let's start with a global search. I'm going to scan the entire project tree for any mention of `rc38xxx`. That should show me where it's being referenced, which in turn *should* lead me to how it's being created, consumed, or at least configured. This is a good starting point. Let's see what the grep command turns up. Hopefully, that will give me enough information to understand where this mysterious `rc38xxx` came from.

{
  "Expression": "rc38xxx",
  "PathPrefix": ""
}

{
  "Output": "drivers/ptp/ptp_fc3.c=1002=static struct platform_driver idtfc3_driver = {\ndrivers/ptp/ptp_fc3.c-1003-\t.driver = {\ndrivers/ptp/ptp_fc3.c:1004:\t\t.name = \"rc38xxx-phc\",\ndrivers/ptp/ptp_fc3.c-1005-\t},\n"
}

gemini-3.1-pro-preview

null

null

							input: 32690
							output: 23
							thoughts: 16
						

Okay, here's my thought process on that:

**Investigating the `idtfc3` Reference**

Hmm, `idtfc3`. That name rings a bell... I need to figure out what context it's showing up in. My first thought is to see if any other files in the current project, or potentially in the wider codebase, are also referencing `idtfc3`. It could be a key, an identifier, a variable name... anything really. Determining where else it shows up will give me the contextual clues I need to understand its role. A quick search should give me some initial leads. Let's see what turns up.

{
  "Expression": "idtfc3",
  "PathPrefix": ""
}

{
  "Output": "\nFull output is too long, showing 500 out of 745 lines.\nUse more precise expression if possible.\n\ndrivers/ptp/ptp_fc3.c=36=module_param(firmware, charp, 0);\ndrivers/ptp/ptp_fc3.c-37-\ndrivers/ptp/ptp_fc3.c:38:static s64 ns2counters(struct idtfc3 *idtfc3, s64 nsec, u32 *sub_ns)\ndrivers/ptp/ptp_fc3.c-39-{\n--\ndrivers/ptp/ptp_fc3.c-43-\tif (likely(nsec \u003e= 0)) {\ndrivers/ptp/ptp_fc3.c:44:\t\tsync = div_u64_rem(nsec, idtfc3-\u003ens_per_sync, \u0026rem);\ndrivers/ptp/ptp_fc3.c-45-\t\t*sub_ns = rem;\ndrivers/ptp/ptp_fc3.c-46-\t} else {\ndrivers/ptp/ptp_fc3.c:47:\t\tsync = -div_u64_rem(-nsec - 1, idtfc3-\u003ens_per_sync, \u0026rem) - 1;\ndrivers/ptp/ptp_fc3.c:48:\t\t*sub_ns = idtfc3-\u003ens_per_sync - rem - 1;\ndrivers/ptp/ptp_fc3.c-49-\t}\ndrivers/ptp/ptp_fc3.c-50-\ndrivers/ptp/ptp_fc3.c:51:\treturn sync * idtfc3-\u003ens_per_sync;\ndrivers/ptp/ptp_fc3.c-52-}\ndrivers/ptp/ptp_fc3.c-53-\ndrivers/ptp/ptp_fc3.c:54:static s64 tdc_meas2offset(struct idtfc3 *idtfc3, u64 meas_read)\ndrivers/ptp/ptp_fc3.c-55-{\n--\ndrivers/ptp/ptp_fc3.c-60-\ndrivers/ptp/ptp_fc3.c:61:\tfine = div64_s64(fine * NSEC_PER_SEC, idtfc3-\u003etdc_apll_freq * 62LL);\ndrivers/ptp/ptp_fc3.c:62:\tcoarse = div64_s64(coarse * NSEC_PER_SEC, idtfc3-\u003etime_ref_freq);\ndrivers/ptp/ptp_fc3.c-63-\n--\ndrivers/ptp/ptp_fc3.c-66-\ndrivers/ptp/ptp_fc3.c:67:static s64 tdc_offset2phase(struct idtfc3 *idtfc3, s64 offset_ns)\ndrivers/ptp/ptp_fc3.c-68-{\ndrivers/ptp/ptp_fc3.c:69:\tif (offset_ns \u003e idtfc3-\u003ens_per_sync / 2)\ndrivers/ptp/ptp_fc3.c:70:\t\toffset_ns -= idtfc3-\u003ens_per_sync;\ndrivers/ptp/ptp_fc3.c-71-\ndrivers/ptp/ptp_fc3.c:72:\treturn offset_ns * idtfc3-\u003etdc_offset_sign;\ndrivers/ptp/ptp_fc3.c-73-}\ndrivers/ptp/ptp_fc3.c-74-\ndrivers/ptp/ptp_fc3.c:75:static int idtfc3_set_lpf_mode(struct idtfc3 *idtfc3, u8 mode)\ndrivers/ptp/ptp_fc3.c-76-{\n--\ndrivers/ptp/ptp_fc3.c-81-\ndrivers/ptp/ptp_fc3.c:82:\tif (idtfc3-\u003elpf_mode == mode)\ndrivers/ptp/ptp_fc3.c-83-\t\treturn 0;\ndrivers/ptp/ptp_fc3.c-84-\ndrivers/ptp/ptp_fc3.c:85:\terr = regmap_bulk_write(idtfc3-\u003eregmap, LPF_MODE_CNFG, \u0026mode, sizeof(mode));\ndrivers/ptp/ptp_fc3.c-86-\tif (err)\n--\ndrivers/ptp/ptp_fc3.c-88-\ndrivers/ptp/ptp_fc3.c:89:\tidtfc3-\u003elpf_mode = mode;\ndrivers/ptp/ptp_fc3.c-90-\n--\ndrivers/ptp/ptp_fc3.c-93-\ndrivers/ptp/ptp_fc3.c:94:static int idtfc3_enable_lpf(struct idtfc3 *idtfc3, bool enable)\ndrivers/ptp/ptp_fc3.c-95-{\n--\ndrivers/ptp/ptp_fc3.c-98-\ndrivers/ptp/ptp_fc3.c:99:\terr = regmap_bulk_read(idtfc3-\u003eregmap, LPF_CTRL, \u0026val, sizeof(val));\ndrivers/ptp/ptp_fc3.c-100-\tif (err)\n--\ndrivers/ptp/ptp_fc3.c-107-\ndrivers/ptp/ptp_fc3.c:108:\treturn regmap_bulk_write(idtfc3-\u003eregmap, LPF_CTRL, \u0026val, sizeof(val));\ndrivers/ptp/ptp_fc3.c-109-}\ndrivers/ptp/ptp_fc3.c-110-\ndrivers/ptp/ptp_fc3.c:111:static int idtfc3_get_time_ref_freq(struct idtfc3 *idtfc3)\ndrivers/ptp/ptp_fc3.c-112-{\n--\ndrivers/ptp/ptp_fc3.c-117-\ndrivers/ptp/ptp_fc3.c:118:\terr = regmap_bulk_read(idtfc3-\u003eregmap, TIME_CLOCK_MEAS_DIV_CNFG, buf, sizeof(buf));\ndrivers/ptp/ptp_fc3.c-119-\tif (err)\n--\ndrivers/ptp/ptp_fc3.c-122-\ndrivers/ptp/ptp_fc3.c:123:\terr = regmap_bulk_read(idtfc3-\u003eregmap, TIME_CLOCK_COUNT, buf, 1);\ndrivers/ptp/ptp_fc3.c-124-\tif (err)\n--\ndrivers/ptp/ptp_fc3.c-126-\ttime_clk_div = (buf[0] \u0026 TIME_CLOCK_COUNT_MASK) + 1;\ndrivers/ptp/ptp_fc3.c:127:\tidtfc3-\u003etime_ref_freq = idtfc3-\u003ehw_param.time_clk_freq *\ndrivers/ptp/ptp_fc3.c-128-\t\t\t\ttime_clk_div / time_ref_div;\n--\ndrivers/ptp/ptp_fc3.c-132-\ndrivers/ptp/ptp_fc3.c:133:static int idtfc3_get_tdc_offset_sign(struct idtfc3 *idtfc3)\ndrivers/ptp/ptp_fc3.c-134-{\n--\ndrivers/ptp/ptp_fc3.c-139-\ndrivers/ptp/ptp_fc3.c:140:\terr = regmap_bulk_read(idtfc3-\u003eregmap, TIME_CLOCK_TDC_FANOUT_CNFG, buf, sizeof(buf));\ndrivers/ptp/ptp_fc3.c-141-\tif (err)\n--\ndrivers/ptp/ptp_fc3.c-145-\tif ((val \u0026 TIME_SYNC_TO_TDC_EN) != TIME_SYNC_TO_TDC_EN) {\ndrivers/ptp/ptp_fc3.c:146:\t\tdev_err(idtfc3-\u003edev, \"TIME_SYNC_TO_TDC_EN is off !!!\");\ndrivers/ptp/ptp_fc3.c-147-\t\treturn -EINVAL;\n--\ndrivers/ptp/ptp_fc3.c-153-\tif ((sig1 == sig2) || ((sig1 != TIME_SYNC) \u0026\u0026 (sig2 != TIME_SYNC))) {\ndrivers/ptp/ptp_fc3.c:154:\t\tdev_err(idtfc3-\u003edev, \"Invalid tdc_mux_sel sig1=%d sig2=%d\", sig1, sig2);\ndrivers/ptp/ptp_fc3.c-155-\t\treturn -EINVAL;\ndrivers/ptp/ptp_fc3.c-156-\t} else if (sig1 == TIME_SYNC) {\ndrivers/ptp/ptp_fc3.c:157:\t\tidtfc3-\u003etdc_offset_sign = 1;\ndrivers/ptp/ptp_fc3.c-158-\t} else if (sig2 == TIME_SYNC) {\ndrivers/ptp/ptp_fc3.c:159:\t\tidtfc3-\u003etdc_offset_sign = -1;\ndrivers/ptp/ptp_fc3.c-160-\t}\n--\ndrivers/ptp/ptp_fc3.c-164-\ndrivers/ptp/ptp_fc3.c:165:static int idtfc3_lpf_bw(struct idtfc3 *idtfc3, u8 shift, u8 mult)\ndrivers/ptp/ptp_fc3.c-166-{\n--\ndrivers/ptp/ptp_fc3.c-168-\ndrivers/ptp/ptp_fc3.c:169:\treturn regmap_bulk_write(idtfc3-\u003eregmap, LPF_BW_CNFG, \u0026val, sizeof(val));\ndrivers/ptp/ptp_fc3.c-170-}\ndrivers/ptp/ptp_fc3.c-171-\ndrivers/ptp/ptp_fc3.c:172:static int idtfc3_enable_tdc(struct idtfc3 *idtfc3, bool enable, u8 meas_mode)\ndrivers/ptp/ptp_fc3.c-173-{\n--\ndrivers/ptp/ptp_fc3.c-177-\t/* Disable TDC first */\ndrivers/ptp/ptp_fc3.c:178:\terr = regmap_bulk_write(idtfc3-\u003eregmap, TIME_CLOCK_MEAS_CTRL, \u0026val, sizeof(val));\ndrivers/ptp/ptp_fc3.c-179-\tif (err)\n--\ndrivers/ptp/ptp_fc3.c-182-\tif (enable == false)\ndrivers/ptp/ptp_fc3.c:183:\t\treturn idtfc3_lpf_bw(idtfc3, LPF_BW_SHIFT_DEFAULT, LPF_BW_MULT_DEFAULT);\ndrivers/ptp/ptp_fc3.c-184-\n--\ndrivers/ptp/ptp_fc3.c-188-\t/* Change TDC meas mode */\ndrivers/ptp/ptp_fc3.c:189:\terr = regmap_bulk_write(idtfc3-\u003eregmap, TIME_CLOCK_MEAS_CNFG,\ndrivers/ptp/ptp_fc3.c-190-\t\t\t\t\u0026meas_mode, sizeof(meas_mode));\n--\ndrivers/ptp/ptp_fc3.c-197-\t\tval |= TDC_MEAS_START;\ndrivers/ptp/ptp_fc3.c:198:\terr = regmap_bulk_write(idtfc3-\u003eregmap, TIME_CLOCK_MEAS_CTRL, \u0026val, sizeof(val));\ndrivers/ptp/ptp_fc3.c-199-\tif (err)\n--\ndrivers/ptp/ptp_fc3.c-201-\ndrivers/ptp/ptp_fc3.c:202:\treturn idtfc3_lpf_bw(idtfc3, LPF_BW_SHIFT_1PPS, LPF_BW_MULT_DEFAULT);\ndrivers/ptp/ptp_fc3.c-203-}\ndrivers/ptp/ptp_fc3.c-204-\ndrivers/ptp/ptp_fc3.c:205:static bool get_tdc_meas(struct idtfc3 *idtfc3, s64 *offset_ns)\ndrivers/ptp/ptp_fc3.c-206-{\n--\ndrivers/ptp/ptp_fc3.c-212-\twhile (true) {\ndrivers/ptp/ptp_fc3.c:213:\t\terr = regmap_bulk_read(idtfc3-\u003eregmap, TDC_FIFO_STS,\ndrivers/ptp/ptp_fc3.c-214-\t\t\t\t       \u0026val, sizeof(val));\n--\ndrivers/ptp/ptp_fc3.c-220-\ndrivers/ptp/ptp_fc3.c:221:\t\terr = regmap_bulk_read(idtfc3-\u003eregmap, TDC_FIFO_READ_REQ,\ndrivers/ptp/ptp_fc3.c-222-\t\t\t\t       \u0026buf, sizeof(buf));\n--\ndrivers/ptp/ptp_fc3.c-229-\tif (valid)\ndrivers/ptp/ptp_fc3.c:230:\t\t*offset_ns = tdc_meas2offset(idtfc3, get_unaligned_le64(\u0026buf[1]));\ndrivers/ptp/ptp_fc3.c-231-\n--\ndrivers/ptp/ptp_fc3.c-234-\ndrivers/ptp/ptp_fc3.c:235:static int check_tdc_fifo_overrun(struct idtfc3 *idtfc3)\ndrivers/ptp/ptp_fc3.c-236-{\n--\ndrivers/ptp/ptp_fc3.c-240-\t/* Check if FIFO is overrun */\ndrivers/ptp/ptp_fc3.c:241:\terr = regmap_bulk_read(idtfc3-\u003eregmap, TDC_FIFO_STS, \u0026val, sizeof(val));\ndrivers/ptp/ptp_fc3.c-242-\tif (err)\n--\ndrivers/ptp/ptp_fc3.c-247-\ndrivers/ptp/ptp_fc3.c:248:\tdev_warn(idtfc3-\u003edev, \"TDC FIFO overrun !!!\");\ndrivers/ptp/ptp_fc3.c-249-\ndrivers/ptp/ptp_fc3.c:250:\terr = idtfc3_enable_tdc(idtfc3, true, CONTINUOUS);\ndrivers/ptp/ptp_fc3.c-251-\tif (err)\n--\ndrivers/ptp/ptp_fc3.c-256-\ndrivers/ptp/ptp_fc3.c:257:static int get_tdc_meas_continuous(struct idtfc3 *idtfc3)\ndrivers/ptp/ptp_fc3.c-258-{\n--\ndrivers/ptp/ptp_fc3.c-262-\ndrivers/ptp/ptp_fc3.c:263:\terr = check_tdc_fifo_overrun(idtfc3);\ndrivers/ptp/ptp_fc3.c-264-\tif (err)\n--\ndrivers/ptp/ptp_fc3.c-266-\ndrivers/ptp/ptp_fc3.c:267:\tif (get_tdc_meas(idtfc3, \u0026offset_ns) \u0026\u0026 offset_ns \u003e= 0) {\ndrivers/ptp/ptp_fc3.c-268-\t\tevent.index = 0;\ndrivers/ptp/ptp_fc3.c:269:\t\tevent.offset = tdc_offset2phase(idtfc3, offset_ns);\ndrivers/ptp/ptp_fc3.c-270-\t\tevent.type = PTP_CLOCK_EXTOFF;\ndrivers/ptp/ptp_fc3.c:271:\t\tptp_clock_event(idtfc3-\u003eptp_clock, \u0026event);\ndrivers/ptp/ptp_fc3.c-272-\t}\n--\ndrivers/ptp/ptp_fc3.c-276-\ndrivers/ptp/ptp_fc3.c:277:static int idtfc3_read_subcounter(struct idtfc3 *idtfc3)\ndrivers/ptp/ptp_fc3.c-278-{\n--\ndrivers/ptp/ptp_fc3.c-281-\ndrivers/ptp/ptp_fc3.c:282:\terr = regmap_bulk_read(idtfc3-\u003eregmap, TOD_COUNTER_READ_REQ,\ndrivers/ptp/ptp_fc3.c-283-\t\t\t       \u0026buf, sizeof(buf));\n--\ndrivers/ptp/ptp_fc3.c-290-\ndrivers/ptp/ptp_fc3.c:291:static int idtfc3_tod_update_is_done(struct idtfc3 *idtfc3)\ndrivers/ptp/ptp_fc3.c-292-{\n--\ndrivers/ptp/ptp_fc3.c-296-\terr = read_poll_timeout_atomic(regmap_bulk_read, err, !req, USEC_PER_MSEC,\ndrivers/ptp/ptp_fc3.c:297:\t\t\t\t       idtfc3-\u003etc_write_timeout, true, idtfc3-\u003eregmap,\ndrivers/ptp/ptp_fc3.c-298-\t\t\t\t       TOD_SYNC_LOAD_REQ_CTRL, \u0026req, 1);\ndrivers/ptp/ptp_fc3.c-299-\tif (err)\ndrivers/ptp/ptp_fc3.c:300:\t\tdev_err(idtfc3-\u003edev, \"TOD counter write timeout !!!\");\ndrivers/ptp/ptp_fc3.c-301-\n--\ndrivers/ptp/ptp_fc3.c-304-\ndrivers/ptp/ptp_fc3.c:305:static int idtfc3_write_subcounter(struct idtfc3 *idtfc3, u32 counter)\ndrivers/ptp/ptp_fc3.c-306-{\n--\ndrivers/ptp/ptp_fc3.c-315-\ndrivers/ptp/ptp_fc3.c:316:\terr = regmap_bulk_write(idtfc3-\u003eregmap, TOD_SYNC_LOAD_VAL_CTRL,\ndrivers/ptp/ptp_fc3.c-317-\t\t\t\t\u0026buf, sizeof(buf));\n--\ndrivers/ptp/ptp_fc3.c-320-\ndrivers/ptp/ptp_fc3.c:321:\treturn idtfc3_tod_update_is_done(idtfc3);\ndrivers/ptp/ptp_fc3.c-322-}\ndrivers/ptp/ptp_fc3.c-323-\ndrivers/ptp/ptp_fc3.c:324:static int idtfc3_timecounter_update(struct idtfc3 *idtfc3, u32 counter, s64 ns)\ndrivers/ptp/ptp_fc3.c-325-{\n--\ndrivers/ptp/ptp_fc3.c-327-\ndrivers/ptp/ptp_fc3.c:328:\terr = idtfc3_write_subcounter(idtfc3, counter);\ndrivers/ptp/ptp_fc3.c-329-\tif (err)\n--\ndrivers/ptp/ptp_fc3.c-332-\t/* Update time counter */\ndrivers/ptp/ptp_fc3.c:333:\tidtfc3-\u003ens = ns;\ndrivers/ptp/ptp_fc3.c:334:\tidtfc3-\u003elast_counter = counter;\ndrivers/ptp/ptp_fc3.c-335-\n--\ndrivers/ptp/ptp_fc3.c-338-\ndrivers/ptp/ptp_fc3.c:339:static int idtfc3_timecounter_read(struct idtfc3 *idtfc3)\ndrivers/ptp/ptp_fc3.c-340-{\n--\ndrivers/ptp/ptp_fc3.c-342-\ndrivers/ptp/ptp_fc3.c:343:\tnow = idtfc3_read_subcounter(idtfc3);\ndrivers/ptp/ptp_fc3.c-344-\tif (now \u003c 0)\n--\ndrivers/ptp/ptp_fc3.c-346-\ndrivers/ptp/ptp_fc3.c:347:\t/* calculate the delta since the last idtfc3_timecounter_read(): */\ndrivers/ptp/ptp_fc3.c:348:\tif (now \u003e= idtfc3-\u003elast_counter)\ndrivers/ptp/ptp_fc3.c:349:\t\tdelta = now - idtfc3-\u003elast_counter;\ndrivers/ptp/ptp_fc3.c-350-\telse\ndrivers/ptp/ptp_fc3.c:351:\t\tdelta = idtfc3-\u003esub_sync_count - idtfc3-\u003elast_counter + now;\ndrivers/ptp/ptp_fc3.c-352-\ndrivers/ptp/ptp_fc3.c-353-\t/* Update time counter */\ndrivers/ptp/ptp_fc3.c:354:\tidtfc3-\u003ens += delta * idtfc3-\u003ens_per_counter;\ndrivers/ptp/ptp_fc3.c:355:\tidtfc3-\u003elast_counter = now;\ndrivers/ptp/ptp_fc3.c-356-\n--\ndrivers/ptp/ptp_fc3.c-359-\ndrivers/ptp/ptp_fc3.c:360:static int _idtfc3_gettime(struct idtfc3 *idtfc3, struct timespec64 *ts)\ndrivers/ptp/ptp_fc3.c-361-{\n--\ndrivers/ptp/ptp_fc3.c-363-\ndrivers/ptp/ptp_fc3.c:364:\terr = idtfc3_timecounter_read(idtfc3);\ndrivers/ptp/ptp_fc3.c-365-\tif (err)\n--\ndrivers/ptp/ptp_fc3.c-367-\ndrivers/ptp/ptp_fc3.c:368:\t*ts = ns_to_timespec64(idtfc3-\u003ens);\ndrivers/ptp/ptp_fc3.c-369-\n--\ndrivers/ptp/ptp_fc3.c-372-\ndrivers/ptp/ptp_fc3.c:373:static int idtfc3_gettime(struct ptp_clock_info *ptp, struct timespec64 *ts)\ndrivers/ptp/ptp_fc3.c-374-{\ndrivers/ptp/ptp_fc3.c:375:\tstruct idtfc3 *idtfc3 = container_of(ptp, struct idtfc3, caps);\ndrivers/ptp/ptp_fc3.c-376-\tint err;\ndrivers/ptp/ptp_fc3.c-377-\ndrivers/ptp/ptp_fc3.c:378:\tmutex_lock(idtfc3-\u003elock);\ndrivers/ptp/ptp_fc3.c:379:\terr = _idtfc3_gettime(idtfc3, ts);\ndrivers/ptp/ptp_fc3.c:380:\tmutex_unlock(idtfc3-\u003elock);\ndrivers/ptp/ptp_fc3.c-381-\n--\ndrivers/ptp/ptp_fc3.c-384-\ndrivers/ptp/ptp_fc3.c:385:static int _idtfc3_settime(struct idtfc3 *idtfc3, const struct timespec64 *ts)\ndrivers/ptp/ptp_fc3.c-386-{\n--\ndrivers/ptp/ptp_fc3.c-391-\tif (timespec64_valid(ts) == false) {\ndrivers/ptp/ptp_fc3.c:392:\t\tdev_err(idtfc3-\u003edev, \"%s: invalid timespec\", __func__);\ndrivers/ptp/ptp_fc3.c-393-\t\treturn -EINVAL;\n--\ndrivers/ptp/ptp_fc3.c-395-\ndrivers/ptp/ptp_fc3.c:396:\tnow = idtfc3_read_subcounter(idtfc3);\ndrivers/ptp/ptp_fc3.c-397-\tif (now \u003c 0)\n--\ndrivers/ptp/ptp_fc3.c-399-\ndrivers/ptp/ptp_fc3.c:400:\toffset_ns = (idtfc3-\u003esub_sync_count - now) * idtfc3-\u003ens_per_counter;\ndrivers/ptp/ptp_fc3.c-401-\tnow_ns = timespec64_to_ns(ts);\ndrivers/ptp/ptp_fc3.c:402:\t(void)ns2counters(idtfc3, offset_ns + now_ns, \u0026sub_ns);\ndrivers/ptp/ptp_fc3.c-403-\ndrivers/ptp/ptp_fc3.c:404:\tcounter = sub_ns / idtfc3-\u003ens_per_counter;\ndrivers/ptp/ptp_fc3.c:405:\treturn idtfc3_timecounter_update(idtfc3, counter, now_ns);\ndrivers/ptp/ptp_fc3.c-406-}\ndrivers/ptp/ptp_fc3.c-407-\ndrivers/ptp/ptp_fc3.c:408:static int idtfc3_settime(struct ptp_clock_info *ptp, const struct timespec64 *ts)\ndrivers/ptp/ptp_fc3.c-409-{\ndrivers/ptp/ptp_fc3.c:410:\tstruct idtfc3 *idtfc3 = container_of(ptp, struct idtfc3, caps);\ndrivers/ptp/ptp_fc3.c-411-\tint err;\ndrivers/ptp/ptp_fc3.c-412-\ndrivers/ptp/ptp_fc3.c:413:\tmutex_lock(idtfc3-\u003elock);\ndrivers/ptp/ptp_fc3.c:414:\terr = _idtfc3_settime(idtfc3, ts);\ndrivers/ptp/ptp_fc3.c:415:\tmutex_unlock(idtfc3-\u003elock);\ndrivers/ptp/ptp_fc3.c-416-\n--\ndrivers/ptp/ptp_fc3.c-419-\ndrivers/ptp/ptp_fc3.c:420:static int _idtfc3_adjtime(struct idtfc3 *idtfc3, s64 delta)\ndrivers/ptp/ptp_fc3.c-421-{\n--\ndrivers/ptp/ptp_fc3.c-429-\ndrivers/ptp/ptp_fc3.c:430:\tif (idtfc3-\u003ens + delta \u003c 0) {\ndrivers/ptp/ptp_fc3.c:431:\t\tdev_err(idtfc3-\u003edev, \"%lld ns adj is too large\", delta);\ndrivers/ptp/ptp_fc3.c-432-\t\treturn -EINVAL;\n--\ndrivers/ptp/ptp_fc3.c-434-\ndrivers/ptp/ptp_fc3.c:435:\tsync_ns = ns2counters(idtfc3, delta + idtfc3-\u003ens_per_sync, \u0026sub_ns);\ndrivers/ptp/ptp_fc3.c-436-\ndrivers/ptp/ptp_fc3.c:437:\tcounter = sub_ns / idtfc3-\u003ens_per_counter;\ndrivers/ptp/ptp_fc3.c:438:\treturn idtfc3_timecounter_update(idtfc3, counter, idtfc3-\u003ens + sync_ns +\ndrivers/ptp/ptp_fc3.c:439:\t\t\t\t\t\t\t\t\tcounter * idtfc3-\u003ens_per_counter);\ndrivers/ptp/ptp_fc3.c-440-}\ndrivers/ptp/ptp_fc3.c-441-\ndrivers/ptp/ptp_fc3.c:442:static int idtfc3_adjtime(struct ptp_clock_info *ptp, s64 delta)\ndrivers/ptp/ptp_fc3.c-443-{\ndrivers/ptp/ptp_fc3.c:444:\tstruct idtfc3 *idtfc3 = container_of(ptp, struct idtfc3, caps);\ndrivers/ptp/ptp_fc3.c-445-\tint err;\ndrivers/ptp/ptp_fc3.c-446-\ndrivers/ptp/ptp_fc3.c:447:\tmutex_lock(idtfc3-\u003elock);\ndrivers/ptp/ptp_fc3.c:448:\terr = _idtfc3_adjtime(idtfc3, delta);\ndrivers/ptp/ptp_fc3.c:449:\tmutex_unlock(idtfc3-\u003elock);\ndrivers/ptp/ptp_fc3.c-450-\n--\ndrivers/ptp/ptp_fc3.c-453-\ndrivers/ptp/ptp_fc3.c:454:static int _idtfc3_adjphase(struct idtfc3 *idtfc3, s32 delta)\ndrivers/ptp/ptp_fc3.c-455-{\n--\ndrivers/ptp/ptp_fc3.c-459-\ndrivers/ptp/ptp_fc3.c:460:\terr = idtfc3_set_lpf_mode(idtfc3, LPF_WP);\ndrivers/ptp/ptp_fc3.c-461-\tif (err)\n--\ndrivers/ptp/ptp_fc3.c-471-\t */\ndrivers/ptp/ptp_fc3.c:472:\tpcw = div_s64((s64)delta * idtfc3-\u003etdc_apll_freq * 124, NSEC_PER_SEC);\ndrivers/ptp/ptp_fc3.c-473-\n--\ndrivers/ptp/ptp_fc3.c-475-\ndrivers/ptp/ptp_fc3.c:476:\treturn regmap_bulk_write(idtfc3-\u003eregmap, LPF_WR_PHASE_CTRL, buf, sizeof(buf));\ndrivers/ptp/ptp_fc3.c-477-}\ndrivers/ptp/ptp_fc3.c-478-\ndrivers/ptp/ptp_fc3.c:479:static int idtfc3_adjphase(struct ptp_clock_info *ptp, s32 delta)\ndrivers/ptp/ptp_fc3.c-480-{\ndrivers/ptp/ptp_fc3.c:481:\tstruct idtfc3 *idtfc3 = container_of(ptp, struct idtfc3, caps);\ndrivers/ptp/ptp_fc3.c-482-\tint err;\ndrivers/ptp/ptp_fc3.c-483-\ndrivers/ptp/ptp_fc3.c:484:\tmutex_lock(idtfc3-\u003elock);\ndrivers/ptp/ptp_fc3.c:485:\terr = _idtfc3_adjphase(idtfc3, delta);\ndrivers/ptp/ptp_fc3.c:486:\tmutex_unlock(idtfc3-\u003elock);\ndrivers/ptp/ptp_fc3.c-487-\n--\ndrivers/ptp/ptp_fc3.c-490-\ndrivers/ptp/ptp_fc3.c:491:static int _idtfc3_adjfine(struct idtfc3 *idtfc3, long scaled_ppm)\ndrivers/ptp/ptp_fc3.c-492-{\n--\ndrivers/ptp/ptp_fc3.c-496-\ndrivers/ptp/ptp_fc3.c:497:\terr = idtfc3_set_lpf_mode(idtfc3, LPF_WF);\ndrivers/ptp/ptp_fc3.c-498-\tif (err)\n--\ndrivers/ptp/ptp_fc3.c-518-\ndrivers/ptp/ptp_fc3.c:519:\treturn regmap_bulk_write(idtfc3-\u003eregmap, LPF_WR_FREQ_CTRL, buf, sizeof(buf));\ndrivers/ptp/ptp_fc3.c-520-}\ndrivers/ptp/ptp_fc3.c-521-\ndrivers/ptp/ptp_fc3.c:522:static int idtfc3_adjfine(struct ptp_clock_info *ptp, long scaled_ppm)\ndrivers/ptp/ptp_fc3.c-523-{\ndrivers/ptp/ptp_fc3.c:524:\tstruct idtfc3 *idtfc3 = container_of(ptp, struct idtfc3, caps);\ndrivers/ptp/ptp_fc3.c-525-\tint err;\ndrivers/ptp/ptp_fc3.c-526-\ndrivers/ptp/ptp_fc3.c:527:\tmutex_lock(idtfc3-\u003elock);\ndrivers/ptp/ptp_fc3.c:528:\terr = _idtfc3_adjfine(idtfc3, scaled_ppm);\ndrivers/ptp/ptp_fc3.c:529:\tmutex_unlock(idtfc3-\u003elock);\ndrivers/ptp/ptp_fc3.c-530-\n--\ndrivers/ptp/ptp_fc3.c-533-\ndrivers/ptp/ptp_fc3.c:534:static int idtfc3_enable(struct ptp_clock_info *ptp,\ndrivers/ptp/ptp_fc3.c-535-\t\t\t struct ptp_clock_request *rq, int on)\ndrivers/ptp/ptp_fc3.c-536-{\ndrivers/ptp/ptp_fc3.c:537:\tstruct idtfc3 *idtfc3 = container_of(ptp, struct idtfc3, caps);\ndrivers/ptp/ptp_fc3.c-538-\tint err = -EOPNOTSUPP;\ndrivers/ptp/ptp_fc3.c-539-\ndrivers/ptp/ptp_fc3.c:540:\tmutex_lock(idtfc3-\u003elock);\ndrivers/ptp/ptp_fc3.c-541-\tswitch (rq-\u003etype) {\n--\ndrivers/ptp/ptp_fc3.c-557-\t\t\telse\ndrivers/ptp/ptp_fc3.c:558:\t\t\t\terr = idtfc3_enable_tdc(idtfc3, true, CONTINUOUS);\ndrivers/ptp/ptp_fc3.c-559-\t\t} else {\ndrivers/ptp/ptp_fc3.c:560:\t\t\terr = idtfc3_enable_tdc(idtfc3, false, MEAS_MODE_INVALID);\ndrivers/ptp/ptp_fc3.c-561-\t\t}\n--\ndrivers/ptp/ptp_fc3.c-565-\t}\ndrivers/ptp/ptp_fc3.c:566:\tmutex_unlock(idtfc3-\u003elock);\ndrivers/ptp/ptp_fc3.c-567-\ndrivers/ptp/ptp_fc3.c-568-\tif (err)\ndrivers/ptp/ptp_fc3.c:569:\t\tdev_err(idtfc3-\u003edev, \"Failed in %s with err %d!\", __func__, err);\ndrivers/ptp/ptp_fc3.c-570-\n--\ndrivers/ptp/ptp_fc3.c-573-\ndrivers/ptp/ptp_fc3.c:574:static long idtfc3_aux_work(struct ptp_clock_info *ptp)\ndrivers/ptp/ptp_fc3.c-575-{\ndrivers/ptp/ptp_fc3.c:576:\tstruct idtfc3 *idtfc3 = container_of(ptp, struct idtfc3, caps);\ndrivers/ptp/ptp_fc3.c-577-\tstatic int tdc_get;\ndrivers/ptp/ptp_fc3.c-578-\ndrivers/ptp/ptp_fc3.c:579:\tmutex_lock(idtfc3-\u003elock);\ndrivers/ptp/ptp_fc3.c-580-\ttdc_get %= TDC_GET_PERIOD;\ndrivers/ptp/ptp_fc3.c-581-\tif ((tdc_get == 0) || (tdc_get == TDC_GET_PERIOD / 2))\ndrivers/ptp/ptp_fc3.c:582:\t\tidtfc3_timecounter_read(idtfc3);\ndrivers/ptp/ptp_fc3.c:583:\tget_tdc_meas_continuous(idtfc3);\ndrivers/ptp/ptp_fc3.c-584-\ttdc_get++;\ndrivers/ptp/ptp_fc3.c:585:\tmutex_unlock(idtfc3-\u003elock);\ndrivers/ptp/ptp_fc3.c-586-\ndrivers/ptp/ptp_fc3.c:587:\treturn idtfc3-\u003etc_update_period;\ndrivers/ptp/ptp_fc3.c-588-}\ndrivers/ptp/ptp_fc3.c-589-\ndrivers/ptp/ptp_fc3.c:590:static const struct ptp_clock_info idtfc3_caps = {\ndrivers/ptp/ptp_fc3.c-591-\t.owner\t\t= THIS_MODULE,\n--\ndrivers/ptp/ptp_fc3.c-595-\t.supported_extts_flags = PTP_STRICT_FLAGS | PTP_EXT_OFFSET,\ndrivers/ptp/ptp_fc3.c:596:\t.adjphase\t= \u0026idtfc3_adjphase,\ndrivers/ptp/ptp_fc3.c:597:\t.adjfine\t= \u0026idtfc3_adjfine,\ndrivers/ptp/ptp_fc3.c:598:\t.adjtime\t= \u0026idtfc3_adjtime,\ndrivers/ptp/ptp_fc3.c:599:\t.gettime64\t= \u0026idtfc3_gettime,\ndrivers/ptp/ptp_fc3.c:600:\t.settime64\t= \u0026idtfc3_settime,\ndrivers/ptp/ptp_fc3.c:601:\t.enable\t\t= \u0026idtfc3_enable,\ndrivers/ptp/ptp_fc3.c:602:\t.do_aux_work\t= \u0026idtfc3_aux_work,\ndrivers/ptp/ptp_fc3.c-603-};\ndrivers/ptp/ptp_fc3.c-604-\ndrivers/ptp/ptp_fc3.c:605:static int idtfc3_hw_calibrate(struct idtfc3 *idtfc3)\ndrivers/ptp/ptp_fc3.c-606-{\n--\ndrivers/ptp/ptp_fc3.c-617-\tval = TDC_EN;\ndrivers/ptp/ptp_fc3.c:618:\terr = regmap_bulk_write(idtfc3-\u003eregmap, TDC_CTRL,\ndrivers/ptp/ptp_fc3.c-619-\t\t\t\t\u0026val, sizeof(val));\n--\ndrivers/ptp/ptp_fc3.c-622-\tval = TDC_EN | TDC_DAC_RECAL_REQ;\ndrivers/ptp/ptp_fc3.c:623:\terr = regmap_bulk_write(idtfc3-\u003eregmap, TDC_CTRL,\ndrivers/ptp/ptp_fc3.c-624-\t\t\t\t\u0026val, sizeof(val));\n--\ndrivers/ptp/ptp_fc3.c-634-\tval = 0;\ndrivers/ptp/ptp_fc3.c:635:\terr = regmap_bulk_write(idtfc3-\u003eregmap, SOFT_RESET_CTRL,\ndrivers/ptp/ptp_fc3.c-636-\t\t\t\t\u0026val, sizeof(val));\n--\ndrivers/ptp/ptp_fc3.c-639-\tval = APLL_REINIT;\ndrivers/ptp/ptp_fc3.c:640:\terr = regmap_bulk_write(idtfc3-\u003eregmap, SOFT_RESET_CTRL,\ndrivers/ptp/ptp_fc3.c-641-\t\t\t\t\u0026val, sizeof(val));\n--\ndrivers/ptp/ptp_fc3.c-648-\ndrivers/ptp/ptp_fc3.c:649:static int idtfc3_init_timecounter(struct idtfc3 *idtfc3)\ndrivers/ptp/ptp_fc3.c-650-{\n--\ndrivers/ptp/ptp_fc3.c-653-\ndrivers/ptp/ptp_fc3.c:654:\tperiod_ms = idtfc3-\u003esub_sync_count * MSEC_PER_SEC /\ndrivers/ptp/ptp_fc3.c:655:\t\t\tidtfc3-\u003ehw_param.time_clk_freq;\ndrivers/ptp/ptp_fc3.c-656-\ndrivers/ptp/ptp_fc3.c:657:\tidtfc3-\u003etc_update_period = msecs_to_jiffies(period_ms / TDC_GET_PERIOD);\ndrivers/ptp/ptp_fc3.c:658:\tidtfc3-\u003etc_write_timeout = period_ms * USEC_PER_MSEC;\ndrivers/ptp/ptp_fc3.c-659-\ndrivers/ptp/ptp_fc3.c:660:\terr = idtfc3_timecounter_update(idtfc3, 0, 0);\ndrivers/ptp/ptp_fc3.c-661-\tif (err)\n--\ndrivers/ptp/ptp_fc3.c-663-\ndrivers/ptp/ptp_fc3.c:664:\terr = idtfc3_timecounter_read(idtfc3);\ndrivers/ptp/ptp_fc3.c-665-\tif (err)\n--\ndrivers/ptp/ptp_fc3.c-670-\ndrivers/ptp/ptp_fc3.c:671:static int idtfc3_get_tdc_apll_freq(struct idtfc3 *idtfc3)\ndrivers/ptp/ptp_fc3.c-672-{\n--\ndrivers/ptp/ptp_fc3.c-675-\tu8 tdc_ref_div;\ndrivers/ptp/ptp_fc3.c:676:\tstruct idtfc3_hw_param *param = \u0026idtfc3-\u003ehw_param;\ndrivers/ptp/ptp_fc3.c-677-\ndrivers/ptp/ptp_fc3.c:678:\terr = regmap_bulk_read(idtfc3-\u003eregmap, TDC_REF_DIV_CNFG,\ndrivers/ptp/ptp_fc3.c-679-\t\t\t\t\u0026tdc_ref_div, sizeof(tdc_ref_div));\n--\ndrivers/ptp/ptp_fc3.c-682-\ndrivers/ptp/ptp_fc3.c:683:\terr = regmap_bulk_read(idtfc3-\u003eregmap, TDC_FB_DIV_INT_CNFG,\ndrivers/ptp/ptp_fc3.c-684-\t\t\t\t\u0026tdc_fb_div_int, sizeof(tdc_fb_div_int));\n--\ndrivers/ptp/ptp_fc3.c-690-\ndrivers/ptp/ptp_fc3.c:691:\tidtfc3-\u003etdc_apll_freq = div_u64(param-\u003extal_freq * (u64)tdc_fb_div_int,\ndrivers/ptp/ptp_fc3.c-692-\t\t\t\t\t1 \u003c\u003c tdc_ref_div);\n--\ndrivers/ptp/ptp_fc3.c-696-\ndrivers/ptp/ptp_fc3.c:697:static int idtfc3_get_fod(struct idtfc3 *idtfc3)\ndrivers/ptp/ptp_fc3.c-698-{\n--\ndrivers/ptp/ptp_fc3.c-701-\ndrivers/ptp/ptp_fc3.c:702:\terr = regmap_bulk_read(idtfc3-\u003eregmap, TIME_CLOCK_SRC, \u0026fod, sizeof(fod));\ndrivers/ptp/ptp_fc3.c-703-\tif (err)\n--\ndrivers/ptp/ptp_fc3.c-707-\tcase 0:\ndrivers/ptp/ptp_fc3.c:708:\t\tidtfc3-\u003efod_n = FOD_0;\ndrivers/ptp/ptp_fc3.c-709-\t\tbreak;\ndrivers/ptp/ptp_fc3.c-710-\tcase 1:\ndrivers/ptp/ptp_fc3.c:711:\t\tidtfc3-\u003efod_n = FOD_1;\ndrivers/ptp/ptp_fc3.c-712-\t\tbreak;\ndrivers/ptp/ptp_fc3.c-713-\tcase 2:\ndrivers/ptp/ptp_fc3.c:714:\t\tidtfc3-\u003efod_n = FOD_2;\ndrivers/ptp/ptp_fc3.c-715-\t\tbreak;\n--\ndrivers/ptp/ptp_fc3.c-722-\ndrivers/ptp/ptp_fc3.c:723:static int idtfc3_get_sync_count(struct idtfc3 *idtfc3)\ndrivers/ptp/ptp_fc3.c-724-{\n--\ndrivers/ptp/ptp_fc3.c-727-\ndrivers/ptp/ptp_fc3.c:728:\terr = regmap_bulk_read(idtfc3-\u003eregmap, SUB_SYNC_GEN_CNFG, buf, sizeof(buf));\ndrivers/ptp/ptp_fc3.c-729-\tif (err)\n--\ndrivers/ptp/ptp_fc3.c-731-\ndrivers/ptp/ptp_fc3.c:732:\tidtfc3-\u003esub_sync_count = (get_unaligned_le32(buf) \u0026 SUB_SYNC_COUNTER_MASK) + 1;\ndrivers/ptp/ptp_fc3.c:733:\tidtfc3-\u003ens_per_counter = NSEC_PER_SEC / idtfc3-\u003ehw_param.time_clk_freq;\n\n"
}

gemini-3.1-pro-preview

null

null

							input: 45091
							output: 32
							thoughts: 92
						

**Investigating the Origins of "rc38xxx"**

Okay, so I need to track down where this "rc38xxx" device is actually coming from within the kernel source. My first instinct is to check the usual suspects: `arch/` and `drivers/`. I should search for `rc38xxx` there, looking for direct instantiations within board files, or potentially within ACPI or Device Tree (DT) configurations. But, wait... if it's a platform driver, which is a very likely scenario in many embedded systems, it might be *indirectly* instantiated by an I2C or SPI driver. That driver could be responsible for creating a Multi-Function Device (MFD) device which in turn "brings up" this "rc38xxx" device. Right, that's definitely a common pattern. So, a good strategy now is to broaden the search and go directly to `drivers/mfd/` and look for instances of `rc38xxx-phc`. This should help narrow down the search in a systematic way.

no matches

{
  "Expression": "rc38xxx-phc",
  "PathPrefix": "drivers/mfd/"
}

{
  "error": "no matches"
}

gemini-3.1-pro-preview

null

null

							input: 45456
							output: 29
							thoughts: 19
						

Okay, here's my interpretation of that thought process, assuming I'm deep in the weeds of embedded systems and Linux kernel development:

**Hunting Down an RC38xxx Driver**

Alright, I need to find the driver for this `rc38xxx` thing. Based on previous experience, and the naming convention, it's highly likely it’s some kind of multi-function device (MFD). So, the first logical place to check is the `drivers/mfd/` directory within the kernel source. That seems like the most probable location, and it's always best to start with the most obvious and organized place first. Let’s get searching and see what surfaces in that directory!

no matches

{
  "Expression": "rc38xxx",
  "PathPrefix": "drivers/mfd/"
}

{
  "error": "no matches"
}

gemini-3.1-pro-preview

null

null

							input: 45667
							output: 28
							thoughts: 18
						

Here's my thought process, summarized as you requested:

**Navigating the Clock Driver Landscape**

Okay, so I need to find something related to `rc38xxx`, and I have a strong hunch it's going to be in the clock driver directory, `drivers/clk/`. That's the most logical place to start. This means I'm looking for a specific clock controller or peripheral definition that uses that particular naming scheme. My initial thought is it is part of a clock driver. I anticipate this will relate to a Realtek clock source/control. My immediate goal is to locate a source file or header file within that directory that matches or mentions that string. From there, I'll need to dig into the code itself to understand how `rc38xxx` is used and what it controls. It's a classic search-and-discover operation.

no matches

{
  "Expression": "rc38xxx",
  "PathPrefix": "drivers/clk/"
}

{
  "error": "no matches"
}

gemini-3.1-pro-preview

null

null

							input: 45910
							output: 28
							thoughts: 18
						

Here's a summary of my thought process, as if I were the one thinking it:

**Digging into the Network Driver Realm**

Okay, so I need to find something related to `rc38xxx`. My first instinct is to assume that's likely a network driver, given the usual naming conventions I've seen over the years. Therefore, I'm going to head straight into the `drivers/net/` directory. That's the most logical starting point for something with that kind of moniker. I'm expecting to find either a source file, a header, or maybe even a Kconfig file there that references or defines that term. Let's see what we can dig up.

no matches

{
  "Expression": "rc38xxx",
  "PathPrefix": "drivers/net/"
}

{
  "error": "no matches"
}

gemini-3.1-pro-preview

null

null

							input: 46118
							output: 29
							thoughts: 19
						

Here's my thought process, summarized as you requested:

**Searching for a PTP Driver**

Okay, so I need to find something related to `rc38xxx` within the `drivers/ptp/` directory. That immediately narrows the scope – good. The likely candidate is a driver for some kind of Precision Time Protocol (PTP) hardware or device. Given the name, `rc38xxx`, I'm assuming it's a specific model number or device designation. My initial thought is to probably start with a grep or a find and figure out what the kernel source says about it. Then, I need to understand what this driver is about: does it use a specific interface, a particular hardware chip? Is it a NIC-based solution, or something else entirely? A simple search for the text string `rc38xxx` should give some useful hints. It could be a simple configuration option, or a whole device driver. I'll follow up with searches for related terms if the initial search is insufficient. This is the starting point to understand and engage.

{
  "Expression": "rc38xxx",
  "PathPrefix": "drivers/ptp/"
}

{
  "Output": "drivers/ptp/ptp_fc3.c=1002=static struct platform_driver idtfc3_driver = {\ndrivers/ptp/ptp_fc3.c-1003-\t.driver = {\ndrivers/ptp/ptp_fc3.c:1004:\t\t.name = \"rc38xxx-phc\",\ndrivers/ptp/ptp_fc3.c-1005-\t},\n"
}

gemini-3.1-pro-preview

null

null

							input: 46512
							output: 26
							thoughts: 27
						

Okay, here's my summary, presented as a stream of thought:

**Finding the Right Driver for `rc38xxx`**

Alright, time to get to work. First, I need to figure out where the driver for this `rc38xxx` thing lives. Based on my experience, and the naming convention, it's highly likely it's going to be in either the `drivers/mfd/` directory, since it could be a Multi-Function Device component, or just directly under `drivers/`. I should start there and see what I can find. It’s a good starting point for a system like this. Let's start the search.

{
  "Expression": "rc38xxx",
  "PathPrefix": "drivers/"
}

{
  "Output": "drivers/ptp/ptp_fc3.c=1002=static struct platform_driver idtfc3_driver = {\ndrivers/ptp/ptp_fc3.c-1003-\t.driver = {\ndrivers/ptp/ptp_fc3.c:1004:\t\t.name = \"rc38xxx-phc\",\ndrivers/ptp/ptp_fc3.c-1005-\t},\n"
}

gemini-3.1-pro-preview

null

null

							input: 46829
							output: 24
							thoughts: 34
						

Okay, let me think this through.

**Where Did That Function Go?**

Alright, I'm trying to track down this function and it's proving trickier than I anticipated. The first place I'd logically look is the `drivers/` directory, given its common usage for device drivers and associated functions. But if it's not there... hmm, now I need to expand my search. Could it have been moved into a more architecture-specific location within `arch/`? Potentially if it's interacting at a low level. Or, given its function, and based on similar projects I've worked on, perhaps it's actually residing under `sound/`? It might be related to audio handling or some lower-level sound driver. And, finally, a less likely but important possibility: is it defined in a shared `include/` file? That's definitely worth checking. I need to broaden the scope of my search and systematically rule out these likely locations. Let's start the hunt again.

{
  "Expression": "rc38xxx",
  "PathPrefix": ""
}

{
  "Output": "drivers/ptp/ptp_fc3.c=1002=static struct platform_driver idtfc3_driver = {\ndrivers/ptp/ptp_fc3.c-1003-\t.driver = {\ndrivers/ptp/ptp_fc3.c:1004:\t\t.name = \"rc38xxx-phc\",\ndrivers/ptp/ptp_fc3.c-1005-\t},\n"
}

gemini-3.1-pro-preview

null

null

							input: 47223
							output: 37
							thoughts: 66
						

**Investigating the Platform Driver Probe**

Okay, hold on a minute. This is peculiar. I was expecting to find this thing somewhere in the kernel's device tree, but it's not showing up. How in the world can a platform driver like this be probed if there's *no* corresponding platform device being explicitly created for it? That's just…wrong. The whole framework is predicated on that connection.

Could it be that the platform device is being constructed dynamically, potentially through the Device Tree? That's the only logical explanation I can come up with. Let me go back and re-examine the `idtfc3_driver` source code. I need to know if it's using the `of_match_table`. That's the key. If it's matching on a Device Tree node, then it's all making perfect sense. Otherwise, I'm completely lost.

no matches

{
  "Expression": "of_match_table",
  "PathPrefix": "drivers/ptp/ptp_fc3.c"
}

{
  "error": "no matches"
}

gemini-3.1-pro-preview

null

null

							input: 47531
							output: 38
							thoughts: 13
						

Okay, here's my summarized thought process, assuming I'm an expert:

**Investigating ACPI Table Matching**

Right, so I'm looking at this...system, and the first question that pops into my head is: *Does it have an `acpi_match_table`?* That's the crucial initial check, isn't it? That table is where the rubber meets the road for identifying and initializing ACPI devices. If it's there, that's step one. If it *isn't*, that immediately tells me I'm dealing with something unusual or potentially broken. I'll need to go deeper. The presence or absence of that table dictates the entire approach, really. So, `acpi_match_table`... gotta know right away.

no matches

{
  "Expression": "acpi_match_table",
  "PathPrefix": "drivers/ptp/ptp_fc3.c"
}

{
  "error": "no matches"
}

gemini-3.1-pro-preview

null

null

							input: 47764
							output: 29
							thoughts: 201
						

**Investigating the Probe Mechanism**

Okay, so I'm looking at this `ptp_fc3.c` file and I'm trying to understand how this "rc38xxx-phc" platform device is actually getting instantiated. I see no direct calls to `of_match_table` or `acpi_match_table` within the file, which is a bit puzzling. And if I understand the kernel correctly, it seems it's not being created in the regular platform device declaration either. So, how on earth is it getting probed?

My first thought is, could it be a situation where an I2C driver in the same file is responsible? Or, perhaps this `ptp_fc3.c` is part of a larger, still-in-progress patch series, and the MFD driver responsible hasn't been merged yet? That's a definite possibility. Another, albeit less likely, scenario would be some sort of userspace interaction, maybe through `echo rc38xxx-phc > /sys/bus/platform/drivers_probe`, but that seems a bit… clunky, and also requires a device to pre-exist. The only other possible option that springs to mind is a module using `platform_device_register_simple`. But I already did a text search for "rc38xxx", and came up empty handed.

Alright, maybe I'm barking up the wrong tree entirely. Could the MFD driver be under a different name? "rsmu" comes to mind. Let me quickly check the `drivers/mfd/rsmu*` directory. I should have found a driver there.

no matches

{
  "Expression": "rc38xxx",
  "PathPrefix": "drivers/mfd/"
}

{
  "error": "no matches"
}

gemini-3.1-pro-preview

null

null

							input: 48356
							output: 40
							thoughts: 19
						

Here's my thought process, as it stands:

**Checking `idtfc3_probe` Expectations**

Okay, before I go any further down this rabbit hole, I need to take a step back and make absolutely sure I'm not missing something fundamental. Specifically, I need to understand what `idtfc3_probe` *expects*. I need to dig into the documentation, look at the source code – whatever's necessary to nail down the function's preconditions, required inputs, and the assumptions it makes about the environment it's running in. A poorly understood `probe` function is a recipe for disaster. I want to make sure I completely understand what this `idtfc3_probe` function is expecting before I try to integrate it into anything. I don’t want to be wasting time on a dead end. I need to know the parameters, their types, their valid ranges, any dependencies, side effects. This investigation is absolutely critical to avoid troubleshooting later.

{
  "File": "drivers/ptp/ptp_fc3.c",
  "FirstLine": 940,
  "LineCount": 60
}

{
  "Contents": " 940:\t\tif ((device_id \u0026 DEVICE_ID_MASK) == 0) {\n 941:\t\t\tdev_err(idtfc3-\u003edev, \"invalid device\");\n 942:\t\t\treturn -EINVAL;\n 943:\t\t}\n 944:\t\n 945:\t\treturn 0;\n 946:\t}\n 947:\t\n 948:\tstatic int idtfc3_probe(struct platform_device *pdev)\n 949:\t{\n 950:\t\tstruct rsmu_ddata *ddata = dev_get_drvdata(pdev-\u003edev.parent);\n 951:\t\tstruct idtfc3 *idtfc3;\n 952:\t\tint err;\n 953:\t\n 954:\t\tidtfc3 = devm_kzalloc(\u0026pdev-\u003edev, sizeof(struct idtfc3), GFP_KERNEL);\n 955:\t\n 956:\t\tif (!idtfc3)\n 957:\t\t\treturn -ENOMEM;\n 958:\t\n 959:\t\tidtfc3-\u003edev = \u0026pdev-\u003edev;\n 960:\t\tidtfc3-\u003emfd = pdev-\u003edev.parent;\n 961:\t\tidtfc3-\u003elock = \u0026ddata-\u003elock;\n 962:\t\tidtfc3-\u003eregmap = ddata-\u003eregmap;\n 963:\t\n 964:\t\tmutex_lock(idtfc3-\u003elock);\n 965:\t\n 966:\t\terr = idtfc3_check_device_compatibility(idtfc3);\n 967:\t\tif (err) {\n 968:\t\t\tmutex_unlock(idtfc3-\u003elock);\n 969:\t\t\treturn err;\n 970:\t\t}\n 971:\t\n 972:\t\terr = idtfc3_load_firmware(idtfc3);\n 973:\t\tif (err) {\n 974:\t\t\tif (err == -ENOENT) {\n 975:\t\t\t\tmutex_unlock(idtfc3-\u003elock);\n 976:\t\t\t\treturn -EPROBE_DEFER;\n 977:\t\t\t}\n 978:\t\t\tdev_warn(idtfc3-\u003edev, \"loading firmware failed with %d\", err);\n 979:\t\t}\n 980:\t\n 981:\t\terr = idtfc3_enable_ptp(idtfc3);\n 982:\t\tif (err) {\n 983:\t\t\tdev_err(idtfc3-\u003edev, \"idtfc3_enable_ptp failed with %d\", err);\n 984:\t\t\tmutex_unlock(idtfc3-\u003elock);\n 985:\t\t\treturn err;\n 986:\t\t}\n 987:\t\n 988:\t\tmutex_unlock(idtfc3-\u003elock);\n 989:\t\n 990:\t\tplatform_set_drvdata(pdev, idtfc3);\n 991:\t\n 992:\t\treturn 0;\n 993:\t}\n 994:\t\n 995:\tstatic void idtfc3_remove(struct platform_device *pdev)\n 996:\t{\n 997:\t\tstruct idtfc3 *idtfc3 = platform_get_drvdata(pdev);\n 998:\t\n 999:\t\tptp_clock_unregister(idtfc3-\u003eptp_clock);\n"
}

gemini-3.1-pro-preview

null

null

							input: 49500
							output: 27
							thoughts: 59
						

Here's my take on the thought process, as requested:

**Deconstructing the Driver Context**

Okay, so I'm looking at this line: `struct rsmu_ddata *ddata = dev_get_drvdata(pdev->dev.parent);`. Immediately, I see we're dealing with an `rsmu_ddata` struct, which is being retrieved from the parent device. The `dev_get_drvdata()` function suggests this data is associated with a driver. And, the name `rsmu_ddata` strongly implies that this is an `rsmu` driver.

Given that, my next move is clear. I'll need to locate where this `rsmu` driver is implemented. Based on my experience, and the typical Linux driver structure, a multi-function device (MFD) driver is a likely location. So, I'll search for "rsmu" within the `drivers/mfd/` directory. That's probably where I'll find the core driver code and potentially more context on the `rsmu_ddata` structure itself. It's time to dig in and find its definition!

{
  "Expression": "rsmu",
  "PathPrefix": "drivers/mfd/"
}

{
  "Output": "\nFull output is too long, showing 500 out of 507 lines.\nUse more precise expression if possible.\n\ndrivers/mfd/Makefile=298=obj-$(CONFIG_MFD_QNAP_MCU)\t+= qnap-mcu.o\ndrivers/mfd/Makefile-299-\ndrivers/mfd/Makefile:300:obj-$(CONFIG_MFD_RSMU_I2C)\t+= rsmu_i2c.o rsmu_core.o\ndrivers/mfd/Makefile:301:obj-$(CONFIG_MFD_RSMU_SPI)\t+= rsmu_spi.o rsmu_core.o\ndrivers/mfd/Makefile-302-\n--\ndrivers/mfd/rsmu.h-10-\ndrivers/mfd/rsmu.h:11:#include \u003clinux/mfd/rsmu.h\u003e\ndrivers/mfd/rsmu.h-12-\n--\ndrivers/mfd/rsmu.h-14-\ndrivers/mfd/rsmu.h:15:int rsmu_core_init(struct rsmu_ddata *rsmu);\ndrivers/mfd/rsmu.h:16:void rsmu_core_exit(struct rsmu_ddata *rsmu);\ndrivers/mfd/rsmu.h-17-\n--\ndrivers/mfd/rsmu_core.c-10-#include \u003clinux/mfd/core.h\u003e\ndrivers/mfd/rsmu_core.c:11:#include \u003clinux/mfd/rsmu.h\u003e\ndrivers/mfd/rsmu_core.c-12-#include \u003clinux/module.h\u003e\n--\ndrivers/mfd/rsmu_core.c-16-\ndrivers/mfd/rsmu_core.c:17:#include \"rsmu.h\"\ndrivers/mfd/rsmu_core.c-18-\ndrivers/mfd/rsmu_core.c=19=enum {\n--\ndrivers/mfd/rsmu_core.c-24-\ndrivers/mfd/rsmu_core.c:25:static struct mfd_cell rsmu_cm_devs[] = {\ndrivers/mfd/rsmu_core.c-26-\t[RSMU_PHC] = {\n--\ndrivers/mfd/rsmu_core.c-33-\ndrivers/mfd/rsmu_core.c:34:static struct mfd_cell rsmu_sabre_devs[] = {\ndrivers/mfd/rsmu_core.c-35-\t[RSMU_PHC] = {\n--\ndrivers/mfd/rsmu_core.c-42-\ndrivers/mfd/rsmu_core.c:43:static struct mfd_cell rsmu_sl_devs[] = {\ndrivers/mfd/rsmu_core.c-44-\t[RSMU_PHC] = {\n--\ndrivers/mfd/rsmu_core.c-51-\ndrivers/mfd/rsmu_core.c:52:int rsmu_core_init(struct rsmu_ddata *rsmu)\ndrivers/mfd/rsmu_core.c-53-{\n--\ndrivers/mfd/rsmu_core.c-56-\ndrivers/mfd/rsmu_core.c:57:\tswitch (rsmu-\u003etype) {\ndrivers/mfd/rsmu_core.c-58-\tcase RSMU_CM:\ndrivers/mfd/rsmu_core.c:59:\t\tcells = rsmu_cm_devs;\ndrivers/mfd/rsmu_core.c-60-\t\tbreak;\ndrivers/mfd/rsmu_core.c-61-\tcase RSMU_SABRE:\ndrivers/mfd/rsmu_core.c:62:\t\tcells = rsmu_sabre_devs;\ndrivers/mfd/rsmu_core.c-63-\t\tbreak;\ndrivers/mfd/rsmu_core.c-64-\tcase RSMU_SL:\ndrivers/mfd/rsmu_core.c:65:\t\tcells = rsmu_sl_devs;\ndrivers/mfd/rsmu_core.c-66-\t\tbreak;\ndrivers/mfd/rsmu_core.c-67-\tdefault:\ndrivers/mfd/rsmu_core.c:68:\t\tdev_err(rsmu-\u003edev, \"Unsupported RSMU device type: %d\\n\", rsmu-\u003etype);\ndrivers/mfd/rsmu_core.c-69-\t\treturn -ENODEV;\n--\ndrivers/mfd/rsmu_core.c-71-\ndrivers/mfd/rsmu_core.c:72:\tmutex_init(\u0026rsmu-\u003elock);\ndrivers/mfd/rsmu_core.c-73-\ndrivers/mfd/rsmu_core.c:74:\tret = devm_mfd_add_devices(rsmu-\u003edev, PLATFORM_DEVID_AUTO, cells,\ndrivers/mfd/rsmu_core.c-75-\t\t\t\t   RSMU_N_DEVS, NULL, 0, NULL);\ndrivers/mfd/rsmu_core.c-76-\tif (ret \u003c 0)\ndrivers/mfd/rsmu_core.c:77:\t\tdev_err(rsmu-\u003edev, \"Failed to register sub-devices: %d\\n\", ret);\ndrivers/mfd/rsmu_core.c-78-\n--\ndrivers/mfd/rsmu_core.c-80-}\ndrivers/mfd/rsmu_core.c:81:EXPORT_SYMBOL_GPL(rsmu_core_init);\ndrivers/mfd/rsmu_core.c-82-\ndrivers/mfd/rsmu_core.c:83:void rsmu_core_exit(struct rsmu_ddata *rsmu)\ndrivers/mfd/rsmu_core.c-84-{\ndrivers/mfd/rsmu_core.c:85:\tmutex_destroy(\u0026rsmu-\u003elock);\ndrivers/mfd/rsmu_core.c-86-}\ndrivers/mfd/rsmu_core.c:87:EXPORT_SYMBOL_GPL(rsmu_core_exit);\ndrivers/mfd/rsmu_core.c-88-\n--\ndrivers/mfd/rsmu_i2c.c-11-#include \u003clinux/mfd/core.h\u003e\ndrivers/mfd/rsmu_i2c.c:12:#include \u003clinux/mfd/rsmu.h\u003e\ndrivers/mfd/rsmu_i2c.c-13-#include \u003clinux/module.h\u003e\n--\ndrivers/mfd/rsmu_i2c.c-17-\ndrivers/mfd/rsmu_i2c.c:18:#include \"rsmu.h\"\ndrivers/mfd/rsmu_i2c.c-19-\n--\ndrivers/mfd/rsmu_i2c.c-34-\ndrivers/mfd/rsmu_i2c.c:35:typedef int (*rsmu_rw_device)(struct rsmu_ddata *rsmu, u8 reg, u8 *buf, u8 bytes);\ndrivers/mfd/rsmu_i2c.c-36-\ndrivers/mfd/rsmu_i2c.c:37:static const struct regmap_range_cfg rsmu_sabre_range_cfg[] = {\ndrivers/mfd/rsmu_i2c.c-38-\t{\n--\ndrivers/mfd/rsmu_i2c.c-48-\ndrivers/mfd/rsmu_i2c.c:49:static bool rsmu_sabre_volatile_reg(struct device *dev, unsigned int reg)\ndrivers/mfd/rsmu_i2c.c-50-{\n--\ndrivers/mfd/rsmu_i2c.c-58-\ndrivers/mfd/rsmu_i2c.c:59:static int rsmu_smbus_i2c_write_device(struct rsmu_ddata *rsmu, u8 reg, u8 *buf, u8 bytes)\ndrivers/mfd/rsmu_i2c.c-60-{\ndrivers/mfd/rsmu_i2c.c:61:\tstruct i2c_client *client = to_i2c_client(rsmu-\u003edev);\ndrivers/mfd/rsmu_i2c.c-62-\n--\ndrivers/mfd/rsmu_i2c.c-65-\ndrivers/mfd/rsmu_i2c.c:66:static int rsmu_smbus_i2c_read_device(struct rsmu_ddata *rsmu, u8 reg, u8 *buf, u8 bytes)\ndrivers/mfd/rsmu_i2c.c-67-{\ndrivers/mfd/rsmu_i2c.c:68:\tstruct i2c_client *client = to_i2c_client(rsmu-\u003edev);\ndrivers/mfd/rsmu_i2c.c-69-\tint ret;\n--\ndrivers/mfd/rsmu_i2c.c-79-\ndrivers/mfd/rsmu_i2c.c:80:static int rsmu_i2c_read_device(struct rsmu_ddata *rsmu, u8 reg, u8 *buf, u8 bytes)\ndrivers/mfd/rsmu_i2c.c-81-{\ndrivers/mfd/rsmu_i2c.c:82:\tstruct i2c_client *client = to_i2c_client(rsmu-\u003edev);\ndrivers/mfd/rsmu_i2c.c-83-\tstruct i2c_msg msg[2];\n--\ndrivers/mfd/rsmu_i2c.c-98-\tif (cnt \u003c 0) {\ndrivers/mfd/rsmu_i2c.c:99:\t\tdev_err(rsmu-\u003edev, \"i2c_transfer failed at addr: %04x!\", reg);\ndrivers/mfd/rsmu_i2c.c-100-\t\treturn cnt;\ndrivers/mfd/rsmu_i2c.c-101-\t} else if (cnt != 2) {\ndrivers/mfd/rsmu_i2c.c:102:\t\tdev_err(rsmu-\u003edev,\ndrivers/mfd/rsmu_i2c.c-103-\t\t\t\"i2c_transfer sent only %d of 2 messages\", cnt);\n--\ndrivers/mfd/rsmu_i2c.c-109-\ndrivers/mfd/rsmu_i2c.c:110:static int rsmu_i2c_write_device(struct rsmu_ddata *rsmu, u8 reg, u8 *buf, u8 bytes)\ndrivers/mfd/rsmu_i2c.c-111-{\ndrivers/mfd/rsmu_i2c.c:112:\tstruct i2c_client *client = to_i2c_client(rsmu-\u003edev);\ndrivers/mfd/rsmu_i2c.c-113-\t/* we add 1 byte for device register */\n--\ndrivers/mfd/rsmu_i2c.c-133-\ndrivers/mfd/rsmu_i2c.c:134:static int rsmu_write_page_register(struct rsmu_ddata *rsmu, u32 reg,\ndrivers/mfd/rsmu_i2c.c:135:\t\t\t\t    rsmu_rw_device rsmu_write_device)\ndrivers/mfd/rsmu_i2c.c-136-{\n--\ndrivers/mfd/rsmu_i2c.c-141-\t/* Simply return if we are on the same page */\ndrivers/mfd/rsmu_i2c.c:142:\tif (rsmu-\u003epage == page)\ndrivers/mfd/rsmu_i2c.c-143-\t\treturn 0;\n--\ndrivers/mfd/rsmu_i2c.c-149-\ndrivers/mfd/rsmu_i2c.c:150:\terr = rsmu_write_device(rsmu, RSMU_CM_PAGE_ADDR, buf, sizeof(buf));\ndrivers/mfd/rsmu_i2c.c-151-\tif (err)\ndrivers/mfd/rsmu_i2c.c:152:\t\tdev_err(rsmu-\u003edev, \"Failed to set page offset 0x%x\\n\", page);\ndrivers/mfd/rsmu_i2c.c-153-\telse\ndrivers/mfd/rsmu_i2c.c-154-\t\t/* Remember the last page */\ndrivers/mfd/rsmu_i2c.c:155:\t\trsmu-\u003epage = page;\ndrivers/mfd/rsmu_i2c.c-156-\n--\ndrivers/mfd/rsmu_i2c.c-159-\ndrivers/mfd/rsmu_i2c.c:160:static int rsmu_i2c_reg_read(void *context, unsigned int reg, unsigned int *val)\ndrivers/mfd/rsmu_i2c.c-161-{\ndrivers/mfd/rsmu_i2c.c:162:\tstruct rsmu_ddata *rsmu = i2c_get_clientdata((struct i2c_client *)context);\ndrivers/mfd/rsmu_i2c.c-163-\tu8 addr = (u8)(reg \u0026 RSMU_CM_ADDRESS_MASK);\n--\ndrivers/mfd/rsmu_i2c.c-165-\ndrivers/mfd/rsmu_i2c.c:166:\terr = rsmu_write_page_register(rsmu, reg, rsmu_i2c_write_device);\ndrivers/mfd/rsmu_i2c.c-167-\tif (err)\n--\ndrivers/mfd/rsmu_i2c.c-169-\ndrivers/mfd/rsmu_i2c.c:170:\terr = rsmu_i2c_read_device(rsmu, addr, (u8 *)val, 1);\ndrivers/mfd/rsmu_i2c.c-171-\tif (err)\ndrivers/mfd/rsmu_i2c.c:172:\t\tdev_err(rsmu-\u003edev, \"Failed to read offset address 0x%x\\n\", addr);\ndrivers/mfd/rsmu_i2c.c-173-\n--\ndrivers/mfd/rsmu_i2c.c-176-\ndrivers/mfd/rsmu_i2c.c:177:static int rsmu_i2c_reg_write(void *context, unsigned int reg, unsigned int val)\ndrivers/mfd/rsmu_i2c.c-178-{\ndrivers/mfd/rsmu_i2c.c:179:\tstruct rsmu_ddata *rsmu = i2c_get_clientdata((struct i2c_client *)context);\ndrivers/mfd/rsmu_i2c.c-180-\tu8 addr = (u8)(reg \u0026 RSMU_CM_ADDRESS_MASK);\n--\ndrivers/mfd/rsmu_i2c.c-183-\ndrivers/mfd/rsmu_i2c.c:184:\terr = rsmu_write_page_register(rsmu, reg, rsmu_i2c_write_device);\ndrivers/mfd/rsmu_i2c.c-185-\tif (err)\n--\ndrivers/mfd/rsmu_i2c.c-187-\ndrivers/mfd/rsmu_i2c.c:188:\terr = rsmu_i2c_write_device(rsmu, addr, \u0026data, 1);\ndrivers/mfd/rsmu_i2c.c-189-\tif (err)\ndrivers/mfd/rsmu_i2c.c:190:\t\tdev_err(rsmu-\u003edev,\ndrivers/mfd/rsmu_i2c.c-191-\t\t\t\"Failed to write offset address 0x%x\\n\", addr);\n--\ndrivers/mfd/rsmu_i2c.c-195-\ndrivers/mfd/rsmu_i2c.c:196:static int rsmu_smbus_i2c_reg_read(void *context, unsigned int reg, unsigned int *val)\ndrivers/mfd/rsmu_i2c.c-197-{\ndrivers/mfd/rsmu_i2c.c:198:\tstruct rsmu_ddata *rsmu = i2c_get_clientdata((struct i2c_client *)context);\ndrivers/mfd/rsmu_i2c.c-199-\tu8 addr = (u8)(reg \u0026 RSMU_CM_ADDRESS_MASK);\n--\ndrivers/mfd/rsmu_i2c.c-201-\ndrivers/mfd/rsmu_i2c.c:202:\terr = rsmu_write_page_register(rsmu, reg, rsmu_smbus_i2c_write_device);\ndrivers/mfd/rsmu_i2c.c-203-\tif (err)\n--\ndrivers/mfd/rsmu_i2c.c-205-\ndrivers/mfd/rsmu_i2c.c:206:\terr = rsmu_smbus_i2c_read_device(rsmu, addr, (u8 *)val, 1);\ndrivers/mfd/rsmu_i2c.c-207-\tif (err)\ndrivers/mfd/rsmu_i2c.c:208:\t\tdev_err(rsmu-\u003edev, \"Failed to read offset address 0x%x\\n\", addr);\ndrivers/mfd/rsmu_i2c.c-209-\n--\ndrivers/mfd/rsmu_i2c.c-212-\ndrivers/mfd/rsmu_i2c.c:213:static int rsmu_smbus_i2c_reg_write(void *context, unsigned int reg, unsigned int val)\ndrivers/mfd/rsmu_i2c.c-214-{\ndrivers/mfd/rsmu_i2c.c:215:\tstruct rsmu_ddata *rsmu = i2c_get_clientdata((struct i2c_client *)context);\ndrivers/mfd/rsmu_i2c.c-216-\tu8 addr = (u8)(reg \u0026 RSMU_CM_ADDRESS_MASK);\n--\ndrivers/mfd/rsmu_i2c.c-219-\ndrivers/mfd/rsmu_i2c.c:220:\terr = rsmu_write_page_register(rsmu, reg, rsmu_smbus_i2c_write_device);\ndrivers/mfd/rsmu_i2c.c-221-\tif (err)\n--\ndrivers/mfd/rsmu_i2c.c-223-\ndrivers/mfd/rsmu_i2c.c:224:\terr = rsmu_smbus_i2c_write_device(rsmu, addr, \u0026data, 1);\ndrivers/mfd/rsmu_i2c.c-225-\tif (err)\ndrivers/mfd/rsmu_i2c.c:226:\t\tdev_err(rsmu-\u003edev,\ndrivers/mfd/rsmu_i2c.c-227-\t\t\t\"Failed to write offset address 0x%x\\n\", addr);\n--\ndrivers/mfd/rsmu_i2c.c-231-\ndrivers/mfd/rsmu_i2c.c:232:static const struct regmap_config rsmu_i2c_cm_regmap_config = {\ndrivers/mfd/rsmu_i2c.c-233-\t.reg_bits = 32,\n--\ndrivers/mfd/rsmu_i2c.c-235-\t.max_register = 0x20120000,\ndrivers/mfd/rsmu_i2c.c:236:\t.reg_read = rsmu_i2c_reg_read,\ndrivers/mfd/rsmu_i2c.c:237:\t.reg_write = rsmu_i2c_reg_write,\ndrivers/mfd/rsmu_i2c.c-238-\t.cache_type = REGCACHE_NONE,\n--\ndrivers/mfd/rsmu_i2c.c-240-\ndrivers/mfd/rsmu_i2c.c:241:static const struct regmap_config rsmu_smbus_i2c_cm_regmap_config = {\ndrivers/mfd/rsmu_i2c.c-242-\t.reg_bits = 32,\n--\ndrivers/mfd/rsmu_i2c.c-244-\t.max_register = 0x20120000,\ndrivers/mfd/rsmu_i2c.c:245:\t.reg_read = rsmu_smbus_i2c_reg_read,\ndrivers/mfd/rsmu_i2c.c:246:\t.reg_write = rsmu_smbus_i2c_reg_write,\ndrivers/mfd/rsmu_i2c.c-247-\t.cache_type = REGCACHE_NONE,\n--\ndrivers/mfd/rsmu_i2c.c-249-\ndrivers/mfd/rsmu_i2c.c:250:static const struct regmap_config rsmu_sabre_regmap_config = {\ndrivers/mfd/rsmu_i2c.c-251-\t.reg_bits = 8,\n--\ndrivers/mfd/rsmu_i2c.c-253-\t.max_register = 0x400,\ndrivers/mfd/rsmu_i2c.c:254:\t.ranges = rsmu_sabre_range_cfg,\ndrivers/mfd/rsmu_i2c.c:255:\t.num_ranges = ARRAY_SIZE(rsmu_sabre_range_cfg),\ndrivers/mfd/rsmu_i2c.c:256:\t.volatile_reg = rsmu_sabre_volatile_reg,\ndrivers/mfd/rsmu_i2c.c-257-\t.cache_type = REGCACHE_MAPLE,\n--\ndrivers/mfd/rsmu_i2c.c-260-\ndrivers/mfd/rsmu_i2c.c:261:static const struct regmap_config rsmu_sl_regmap_config = {\ndrivers/mfd/rsmu_i2c.c-262-\t.reg_bits = 16,\n--\ndrivers/mfd/rsmu_i2c.c-269-\ndrivers/mfd/rsmu_i2c.c:270:static int rsmu_i2c_probe(struct i2c_client *client)\ndrivers/mfd/rsmu_i2c.c-271-{\n--\ndrivers/mfd/rsmu_i2c.c-273-\tconst struct regmap_config *cfg;\ndrivers/mfd/rsmu_i2c.c:274:\tstruct rsmu_ddata *rsmu;\ndrivers/mfd/rsmu_i2c.c-275-\tint ret;\ndrivers/mfd/rsmu_i2c.c-276-\ndrivers/mfd/rsmu_i2c.c:277:\trsmu = devm_kzalloc(\u0026client-\u003edev, sizeof(*rsmu), GFP_KERNEL);\ndrivers/mfd/rsmu_i2c.c:278:\tif (!rsmu)\ndrivers/mfd/rsmu_i2c.c-279-\t\treturn -ENOMEM;\ndrivers/mfd/rsmu_i2c.c-280-\ndrivers/mfd/rsmu_i2c.c:281:\ti2c_set_clientdata(client, rsmu);\ndrivers/mfd/rsmu_i2c.c-282-\ndrivers/mfd/rsmu_i2c.c:283:\trsmu-\u003edev = \u0026client-\u003edev;\ndrivers/mfd/rsmu_i2c.c:284:\trsmu-\u003etype = (enum rsmu_type)id-\u003edriver_data;\ndrivers/mfd/rsmu_i2c.c-285-\ndrivers/mfd/rsmu_i2c.c:286:\tswitch (rsmu-\u003etype) {\ndrivers/mfd/rsmu_i2c.c-287-\tcase RSMU_CM:\ndrivers/mfd/rsmu_i2c.c-288-\t\tif (i2c_check_functionality(client-\u003eadapter, I2C_FUNC_I2C)) {\ndrivers/mfd/rsmu_i2c.c:289:\t\t\tcfg = \u0026rsmu_i2c_cm_regmap_config;\ndrivers/mfd/rsmu_i2c.c-290-\t\t} else if (i2c_check_functionality(client-\u003eadapter,\ndrivers/mfd/rsmu_i2c.c-291-\t\t\t\t\t\t   I2C_FUNC_SMBUS_I2C_BLOCK)) {\ndrivers/mfd/rsmu_i2c.c:292:\t\t\tcfg = \u0026rsmu_smbus_i2c_cm_regmap_config;\ndrivers/mfd/rsmu_i2c.c-293-\t\t} else {\ndrivers/mfd/rsmu_i2c.c:294:\t\t\tdev_err(rsmu-\u003edev, \"Unsupported i2c adapter\\n\");\ndrivers/mfd/rsmu_i2c.c-295-\t\t\treturn -ENOTSUPP;\n--\ndrivers/mfd/rsmu_i2c.c-298-\tcase RSMU_SABRE:\ndrivers/mfd/rsmu_i2c.c:299:\t\tcfg = \u0026rsmu_sabre_regmap_config;\ndrivers/mfd/rsmu_i2c.c-300-\t\tbreak;\ndrivers/mfd/rsmu_i2c.c-301-\tcase RSMU_SL:\ndrivers/mfd/rsmu_i2c.c:302:\t\tcfg = \u0026rsmu_sl_regmap_config;\ndrivers/mfd/rsmu_i2c.c-303-\t\tbreak;\ndrivers/mfd/rsmu_i2c.c-304-\tdefault:\ndrivers/mfd/rsmu_i2c.c:305:\t\tdev_err(rsmu-\u003edev, \"Unsupported RSMU device type: %d\\n\", rsmu-\u003etype);\ndrivers/mfd/rsmu_i2c.c-306-\t\treturn -ENODEV;\n--\ndrivers/mfd/rsmu_i2c.c-308-\ndrivers/mfd/rsmu_i2c.c:309:\tif (rsmu-\u003etype == RSMU_CM)\ndrivers/mfd/rsmu_i2c.c:310:\t\trsmu-\u003eregmap = devm_regmap_init(\u0026client-\u003edev, NULL, client, cfg);\ndrivers/mfd/rsmu_i2c.c-311-\telse\ndrivers/mfd/rsmu_i2c.c:312:\t\trsmu-\u003eregmap = devm_regmap_init_i2c(client, cfg);\ndrivers/mfd/rsmu_i2c.c-313-\ndrivers/mfd/rsmu_i2c.c:314:\tif (IS_ERR(rsmu-\u003eregmap)) {\ndrivers/mfd/rsmu_i2c.c:315:\t\tret = PTR_ERR(rsmu-\u003eregmap);\ndrivers/mfd/rsmu_i2c.c:316:\t\tdev_err(rsmu-\u003edev, \"Failed to allocate register map: %d\\n\", ret);\ndrivers/mfd/rsmu_i2c.c-317-\t\treturn ret;\n--\ndrivers/mfd/rsmu_i2c.c-319-\ndrivers/mfd/rsmu_i2c.c:320:\treturn rsmu_core_init(rsmu);\ndrivers/mfd/rsmu_i2c.c-321-}\ndrivers/mfd/rsmu_i2c.c-322-\ndrivers/mfd/rsmu_i2c.c:323:static void rsmu_i2c_remove(struct i2c_client *client)\ndrivers/mfd/rsmu_i2c.c-324-{\ndrivers/mfd/rsmu_i2c.c:325:\tstruct rsmu_ddata *rsmu = i2c_get_clientdata(client);\ndrivers/mfd/rsmu_i2c.c-326-\ndrivers/mfd/rsmu_i2c.c:327:\trsmu_core_exit(rsmu);\ndrivers/mfd/rsmu_i2c.c-328-}\ndrivers/mfd/rsmu_i2c.c-329-\ndrivers/mfd/rsmu_i2c.c:330:static const struct i2c_device_id rsmu_i2c_id[] = {\ndrivers/mfd/rsmu_i2c.c-331-\t{ \"8a34000\",  RSMU_CM },\n--\ndrivers/mfd/rsmu_i2c.c-339-};\ndrivers/mfd/rsmu_i2c.c:340:MODULE_DEVICE_TABLE(i2c, rsmu_i2c_id);\ndrivers/mfd/rsmu_i2c.c-341-\ndrivers/mfd/rsmu_i2c.c:342:static const struct of_device_id rsmu_i2c_of_match[] = {\ndrivers/mfd/rsmu_i2c.c-343-\t{ .compatible = \"idt,8a34000\",  .data = (void *)RSMU_CM },\n--\ndrivers/mfd/rsmu_i2c.c-351-};\ndrivers/mfd/rsmu_i2c.c:352:MODULE_DEVICE_TABLE(of, rsmu_i2c_of_match);\ndrivers/mfd/rsmu_i2c.c-353-\ndrivers/mfd/rsmu_i2c.c:354:static struct i2c_driver rsmu_i2c_driver = {\ndrivers/mfd/rsmu_i2c.c-355-\t.driver = {\ndrivers/mfd/rsmu_i2c.c:356:\t\t.name = \"rsmu-i2c\",\ndrivers/mfd/rsmu_i2c.c:357:\t\t.of_match_table = rsmu_i2c_of_match,\ndrivers/mfd/rsmu_i2c.c-358-\t},\ndrivers/mfd/rsmu_i2c.c:359:\t.probe = rsmu_i2c_probe,\ndrivers/mfd/rsmu_i2c.c:360:\t.remove\t= rsmu_i2c_remove,\ndrivers/mfd/rsmu_i2c.c:361:\t.id_table = rsmu_i2c_id,\ndrivers/mfd/rsmu_i2c.c-362-};\ndrivers/mfd/rsmu_i2c.c-363-\ndrivers/mfd/rsmu_i2c.c:364:static int __init rsmu_i2c_init(void)\ndrivers/mfd/rsmu_i2c.c-365-{\ndrivers/mfd/rsmu_i2c.c:366:\treturn i2c_add_driver(\u0026rsmu_i2c_driver);\ndrivers/mfd/rsmu_i2c.c-367-}\ndrivers/mfd/rsmu_i2c.c:368:subsys_initcall(rsmu_i2c_init);\ndrivers/mfd/rsmu_i2c.c-369-\ndrivers/mfd/rsmu_i2c.c:370:static void __exit rsmu_i2c_exit(void)\ndrivers/mfd/rsmu_i2c.c-371-{\ndrivers/mfd/rsmu_i2c.c:372:\ti2c_del_driver(\u0026rsmu_i2c_driver);\ndrivers/mfd/rsmu_i2c.c-373-}\ndrivers/mfd/rsmu_i2c.c:374:module_exit(rsmu_i2c_exit);\ndrivers/mfd/rsmu_i2c.c-375-\n--\ndrivers/mfd/rsmu_spi.c-10-#include \u003clinux/mfd/core.h\u003e\ndrivers/mfd/rsmu_spi.c:11:#include \u003clinux/mfd/rsmu.h\u003e\ndrivers/mfd/rsmu_spi.c-12-#include \u003clinux/module.h\u003e\n--\ndrivers/mfd/rsmu_spi.c-17-\ndrivers/mfd/rsmu_spi.c:18:#include \"rsmu.h\"\ndrivers/mfd/rsmu_spi.c-19-\n--\ndrivers/mfd/rsmu_spi.c-24-\ndrivers/mfd/rsmu_spi.c:25:static int rsmu_read_device(struct rsmu_ddata *rsmu, u8 reg, u8 *buf, u16 bytes)\ndrivers/mfd/rsmu_spi.c-26-{\ndrivers/mfd/rsmu_spi.c:27:\tstruct spi_device *client = to_spi_device(rsmu-\u003edev);\ndrivers/mfd/rsmu_spi.c-28-\tstruct spi_transfer xfer = {0};\n--\ndrivers/mfd/rsmu_spi.c-65-\ndrivers/mfd/rsmu_spi.c:66:static int rsmu_write_device(struct rsmu_ddata *rsmu, u8 reg, u8 *buf, u16 bytes)\ndrivers/mfd/rsmu_spi.c-67-{\ndrivers/mfd/rsmu_spi.c:68:\tstruct spi_device *client = to_spi_device(rsmu-\u003edev);\ndrivers/mfd/rsmu_spi.c-69-\tstruct spi_transfer xfer = {0};\n--\ndrivers/mfd/rsmu_spi.c-93- */\ndrivers/mfd/rsmu_spi.c:94:static int rsmu_write_page_register(struct rsmu_ddata *rsmu, u32 reg)\ndrivers/mfd/rsmu_spi.c-95-{\n--\ndrivers/mfd/rsmu_spi.c-101-\ndrivers/mfd/rsmu_spi.c:102:\tswitch (rsmu-\u003etype) {\ndrivers/mfd/rsmu_spi.c-103-\tcase RSMU_CM:\n--\ndrivers/mfd/rsmu_spi.c-122-\tdefault:\ndrivers/mfd/rsmu_spi.c:123:\t\tdev_err(rsmu-\u003edev, \"Unsupported RSMU device type: %d\\n\", rsmu-\u003etype);\ndrivers/mfd/rsmu_spi.c-124-\t\treturn -ENODEV;\n--\ndrivers/mfd/rsmu_spi.c-127-\t/* Simply return if we are on the same page */\ndrivers/mfd/rsmu_spi.c:128:\tif (rsmu-\u003epage == page)\ndrivers/mfd/rsmu_spi.c-129-\t\treturn 0;\ndrivers/mfd/rsmu_spi.c-130-\ndrivers/mfd/rsmu_spi.c:131:\terr = rsmu_write_device(rsmu, page_reg, buf, bytes);\ndrivers/mfd/rsmu_spi.c-132-\tif (err)\ndrivers/mfd/rsmu_spi.c:133:\t\tdev_err(rsmu-\u003edev, \"Failed to set page offset 0x%x\\n\", page);\ndrivers/mfd/rsmu_spi.c-134-\telse\ndrivers/mfd/rsmu_spi.c-135-\t\t/* Remember the last page */\ndrivers/mfd/rsmu_spi.c:136:\t\trsmu-\u003epage = page;\ndrivers/mfd/rsmu_spi.c-137-\n--\ndrivers/mfd/rsmu_spi.c-140-\ndrivers/mfd/rsmu_spi.c:141:static int rsmu_reg_read(void *context, unsigned int reg, unsigned int *val)\ndrivers/mfd/rsmu_spi.c-142-{\ndrivers/mfd/rsmu_spi.c:143:\tstruct rsmu_ddata *rsmu = spi_get_drvdata((struct spi_device *)context);\ndrivers/mfd/rsmu_spi.c-144-\tu8 addr = (u8)(reg \u0026 RSMU_ADDR_MASK);\n--\ndrivers/mfd/rsmu_spi.c-146-\ndrivers/mfd/rsmu_spi.c:147:\terr = rsmu_write_page_register(rsmu, reg);\ndrivers/mfd/rsmu_spi.c-148-\tif (err)\n--\ndrivers/mfd/rsmu_spi.c-150-\ndrivers/mfd/rsmu_spi.c:151:\terr = rsmu_read_device(rsmu, addr, (u8 *)val, 1);\ndrivers/mfd/rsmu_spi.c-152-\tif (err)\ndrivers/mfd/rsmu_spi.c:153:\t\tdev_err(rsmu-\u003edev, \"Failed to read offset address 0x%x\\n\", addr);\ndrivers/mfd/rsmu_spi.c-154-\n--\ndrivers/mfd/rsmu_spi.c-157-\ndrivers/mfd/rsmu_spi.c:158:static int rsmu_reg_write(void *context, unsigned int reg, unsigned int val)\ndrivers/mfd/rsmu_spi.c-159-{\ndrivers/mfd/rsmu_spi.c:160:\tstruct rsmu_ddata *rsmu = spi_get_drvdata((struct spi_device *)context);\ndrivers/mfd/rsmu_spi.c-161-\tu8 addr = (u8)(reg \u0026 RSMU_ADDR_MASK);\n--\ndrivers/mfd/rsmu_spi.c-164-\ndrivers/mfd/rsmu_spi.c:165:\terr = rsmu_write_page_register(rsmu, reg);\ndrivers/mfd/rsmu_spi.c-166-\tif (err)\n--\ndrivers/mfd/rsmu_spi.c-168-\ndrivers/mfd/rsmu_spi.c:169:\terr = rsmu_write_device(rsmu, addr, \u0026data, 1);\ndrivers/mfd/rsmu_spi.c-170-\tif (err)\ndrivers/mfd/rsmu_spi.c:171:\t\tdev_err(rsmu-\u003edev,\ndrivers/mfd/rsmu_spi.c-172-\t\t\t\"Failed to write offset address 0x%x\\n\", addr);\n--\ndrivers/mfd/rsmu_spi.c-176-\ndrivers/mfd/rsmu_spi.c:177:static const struct regmap_config rsmu_cm_regmap_config = {\ndrivers/mfd/rsmu_spi.c-178-\t.reg_bits = 32,\n--\ndrivers/mfd/rsmu_spi.c-180-\t.max_register = 0x20120000,\ndrivers/mfd/rsmu_spi.c:181:\t.reg_read = rsmu_reg_read,\ndrivers/mfd/rsmu_spi.c:182:\t.reg_write = rsmu_reg_write,\ndrivers/mfd/rsmu_spi.c-183-\t.cache_type = REGCACHE_NONE,\n--\ndrivers/mfd/rsmu_spi.c-185-\ndrivers/mfd/rsmu_spi.c:186:static const struct regmap_config rsmu_sabre_regmap_config = {\ndrivers/mfd/rsmu_spi.c-187-\t.reg_bits = 16,\n--\ndrivers/mfd/rsmu_spi.c-189-\t.max_register = 0x400,\ndrivers/mfd/rsmu_spi.c:190:\t.reg_read = rsmu_reg_read,\ndrivers/mfd/rsmu_spi.c:191:\t.reg_write = rsmu_reg_write,\ndrivers/mfd/rsmu_spi.c-192-\t.cache_type = REGCACHE_NONE,\n--\ndrivers/mfd/rsmu_spi.c-194-\ndrivers/mfd/rsmu_spi.c:195:static int rsmu_spi_probe(struct spi_device *client)\ndrivers/mfd/rsmu_spi.c-196-{\n--\ndrivers/mfd/rsmu_spi.c-198-\tconst struct regmap_config *cfg;\ndrivers/mfd/rsmu_spi.c:199:\tstruct rsmu_ddata *rsmu;\ndrivers/mfd/rsmu_spi.c-200-\tint ret;\ndrivers/mfd/rsmu_spi.c-201-\ndrivers/mfd/rsmu_spi.c:202:\trsmu = devm_kzalloc(\u0026client-\u003edev, sizeof(*rsmu), GFP_KERNEL);\ndrivers/mfd/rsmu_spi.c:203:\tif (!rsmu)\ndrivers/mfd/rsmu_spi.c-204-\t\treturn -ENOMEM;\ndrivers/mfd/rsmu_spi.c-205-\ndrivers/mfd/rsmu_spi.c:206:\tspi_set_drvdata(client, rsmu);\ndrivers/mfd/rsmu_spi.c-207-\ndrivers/mfd/rsmu_spi.c:208:\trsmu-\u003edev = \u0026client-\u003edev;\ndrivers/mfd/rsmu_spi.c:209:\trsmu-\u003etype = (enum rsmu_type)id-\u003edriver_data;\ndrivers/mfd/rsmu_spi.c-210-\ndrivers/mfd/rsmu_spi.c-211-\t/* Initialize regmap */\ndrivers/mfd/rsmu_spi.c:212:\tswitch (rsmu-\u003etype) {\ndrivers/mfd/rsmu_spi.c-213-\tcase RSMU_CM:\ndrivers/mfd/rsmu_spi.c:214:\t\tcfg = \u0026rsmu_cm_regmap_config;\ndrivers/mfd/rsmu_spi.c-215-\t\tbreak;\ndrivers/mfd/rsmu_spi.c-216-\tcase RSMU_SABRE:\ndrivers/mfd/rsmu_spi.c:217:\t\tcfg = \u0026rsmu_sabre_regmap_config;\ndrivers/mfd/rsmu_spi.c-218-\t\tbreak;\ndrivers/mfd/rsmu_spi.c-219-\tdefault:\ndrivers/mfd/rsmu_spi.c:220:\t\tdev_err(rsmu-\u003edev, \"Unsupported RSMU device type: %d\\n\", rsmu-\u003etype);\ndrivers/mfd/rsmu_spi.c-221-\t\treturn -ENODEV;\n--\ndrivers/mfd/rsmu_spi.c-223-\ndrivers/mfd/rsmu_spi.c:224:\trsmu-\u003eregmap = devm_regmap_init(\u0026client-\u003edev, NULL, client, cfg);\ndrivers/mfd/rsmu_spi.c:225:\tif (IS_ERR(rsmu-\u003eregmap)) {\ndrivers/mfd/rsmu_spi.c:226:\t\tret = PTR_ERR(rsmu-\u003eregmap);\ndrivers/mfd/rsmu_spi.c:227:\t\tdev_err(rsmu-\u003edev, \"Failed to allocate register map: %d\\n\", ret);\ndrivers/mfd/rsmu_spi.c-228-\t\treturn ret;\n--\ndrivers/mfd/rsmu_spi.c-230-\ndrivers/mfd/rsmu_spi.c:231:\treturn rsmu_core_init(rsmu);\ndrivers/mfd/rsmu_spi.c-232-}\ndrivers/mfd/rsmu_spi.c-233-\ndrivers/mfd/rsmu_spi.c:234:static void rsmu_spi_remove(struct spi_device *client)\ndrivers/mfd/rsmu_spi.c-235-{\ndrivers/mfd/rsmu_spi.c:236:\tstruct rsmu_ddata *rsmu = spi_get_drvdata(client);\ndrivers/mfd/rsmu_spi.c-237-\ndrivers/mfd/rsmu_spi.c:238:\trsmu_core_exit(rsmu);\ndrivers/mfd/rsmu_spi.c-239-}\ndrivers/mfd/rsmu_spi.c-240-\ndrivers/mfd/rsmu_spi.c:241:static const struct spi_device_id rsmu_spi_id[] = {\ndrivers/mfd/rsmu_spi.c-242-\t{ \"8a34000\",  RSMU_CM },\n--\ndrivers/mfd/rsmu_spi.c-248-};\ndrivers/mfd/rsmu_spi.c:249:MODULE_DEVICE_TABLE(spi, rsmu_spi_id);\ndrivers/mfd/rsmu_spi.c-250-\ndrivers/mfd/rsmu_spi.c:251:static const struct of_device_id rsmu_spi_of_match[] = {\ndrivers/mfd/rsmu_spi.c-252-\t{ .compatible = \"idt,8a34000\",  .data = (void *)RSMU_CM },\n--\ndrivers/mfd/rsmu_spi.c-258-};\ndrivers/mfd/rsmu_spi.c:259:MODULE_DEVICE_TABLE(of, rsmu_spi_of_match);\ndrivers/mfd/rsmu_spi.c-260-\ndrivers/mfd/rsmu_spi.c:261:static struct spi_driver rsmu_spi_driver = {\ndrivers/mfd/rsmu_spi.c-262-\t.driver = {\ndrivers/mfd/rsmu_spi.c:263:\t\t.name = \"rsmu-spi\",\ndrivers/mfd/rsmu_spi.c:264:\t\t.of_match_table = rsmu_spi_of_match,\ndrivers/mfd/rsmu_spi.c-265-\t},\ndrivers/mfd/rsmu_spi.c:266:\t.probe = rsmu_spi_probe,\ndrivers/mfd/rsmu_spi.c:267:\t.remove\t= rsmu_spi_remove,\ndrivers/mfd/rsmu_spi.c:268:\t.id_table = rsmu_spi_id,\ndrivers/mfd/rsmu_spi.c-269-};\ndrivers/mfd/rsmu_spi.c-270-\ndrivers/mfd/rsmu_spi.c:271:static int __init rsmu_spi_init(void)\ndrivers/mfd/rsmu_spi.c-272-{\ndrivers/mfd/rsmu_spi.c:273:\treturn spi_register_driver(\u0026rsmu_spi_driver);\ndrivers/mfd/rsmu_spi.c-274-}\ndrivers/mfd/rsmu_spi.c:275:subsys_initcall(rsmu_spi_init);\n\n"
}

gemini-3.1-pro-preview

null

null

							input: 61960
							output: 38
							thoughts: 115
						

**Investigating the RSMU and PTP Clock Naming Conventions**

Okay, so I'm digging into this `rsmu_core.c` file and I see this structure declaration:

```c
static struct mfd_cell rsmu_cm_devs[] = {
	[RSMU_PHC] = {
		.name = "rsmu-phc",
	},
};
```

Interesting, the name associated with `RSMU_PHC` is "rsmu-phc". That seems pretty straightforward. But then I have a nagging feeling… I seem to recall seeing something related to a similar device in `ptp_fc3.c` where the name was different, specifically ".name = "rc38xxx-phc"".

Just to be absolutely sure, I'm going to quickly re-check `rsmu_core.c` again. I want to confirm I'm not misremembering or missing something critical about the naming discrepancy between these two files for this Precision Time Protocol (PTP) clock function. This could indicate a subtle difference in device implementation or a potential inconsistency in our naming scheme which I need to understand.

{
  "File": "drivers/mfd/rsmu_core.c",
  "FirstLine": 20,
  "LineCount": 40
}

{
  "Contents": "  20:\t\tRSMU_PHC = 0,\n  21:\t\tRSMU_CDEV = 1,\n  22:\t\tRSMU_N_DEVS = 2,\n  23:\t};\n  24:\t\n  25:\tstatic struct mfd_cell rsmu_cm_devs[] = {\n  26:\t\t[RSMU_PHC] = {\n  27:\t\t\t.name = \"8a3400x-phc\",\n  28:\t\t},\n  29:\t\t[RSMU_CDEV] = {\n  30:\t\t\t.name = \"8a3400x-cdev\",\n  31:\t\t},\n  32:\t};\n  33:\t\n  34:\tstatic struct mfd_cell rsmu_sabre_devs[] = {\n  35:\t\t[RSMU_PHC] = {\n  36:\t\t\t.name = \"82p33x1x-phc\",\n  37:\t\t},\n  38:\t\t[RSMU_CDEV] = {\n  39:\t\t\t.name = \"82p33x1x-cdev\",\n  40:\t\t},\n  41:\t};\n  42:\t\n  43:\tstatic struct mfd_cell rsmu_sl_devs[] = {\n  44:\t\t[RSMU_PHC] = {\n  45:\t\t\t.name = \"8v19n85x-phc\",\n  46:\t\t},\n  47:\t\t[RSMU_CDEV] = {\n  48:\t\t\t.name = \"8v19n85x-cdev\",\n  49:\t\t},\n  50:\t};\n  51:\t\n  52:\tint rsmu_core_init(struct rsmu_ddata *rsmu)\n  53:\t{\n  54:\t\tstruct mfd_cell *cells;\n  55:\t\tint ret;\n  56:\t\n  57:\t\tswitch (rsmu-\u003etype) {\n  58:\t\tcase RSMU_CM:\n  59:\t\t\tcells = rsmu_cm_devs;\n"
}

gemini-3.1-pro-preview

null

null

							input: 62906
							output: 29
							thoughts: 48
						

Okay, let's see... I'm looking at this `rsmu_core.c` code, and something's not quite right. I expected to find the `rc38xxx-phc` driver here, but it's not present. That's a bit odd. I need to refresh my memory on where that driver actually lives within the kernel's directory structure. Right, I know it's a multi-function device (MFD), so it makes sense to go back and check the `drivers/mfd/` directory one more time. Let me just search within there again and see if I can pinpoint its location. I *know* it's in the tree somewhere... I just need a quick refresher.

You are repeating the same tool call with the exact same arguments.
You already have the result of this exact tool call in your conversation history.
Do NOT request it again. You MUST synthesize the information you already have,
try a completely different tool, or proceed to the next step.

{
  "Expression": "rc38xxx",
  "PathPrefix": "drivers/mfd/"
}

{
  "error": "You are repeating the same tool call with the exact same arguments.\nYou already have the result of this exact tool call in your conversation history.\nDo NOT request it again. You MUST synthesize the information you already have,\ntry a completely different tool, or proceed to the next step."
}

gemini-3.1-pro-preview

null

null

							input: 63272
							output: 28
							thoughts: 96
						

Okay, here's my summary, tailored for an expert audience, in the first person:

**Navigating the Codebase: Refining a Search**

Right, I've clearly been here before. I had a hunch and went straight for `rc38xxx` within the `drivers/mfd/` directory. But, hang on a second, didn't I just do that? Need to double-check my work.

Okay, let's back up. Maybe I was too focused. Could it be hiding within a more specific file within that MFD path, like `drivers/mfd/idt8a340_reg.c`? No, wait... my previous search encompassed that. I'm clearly getting ahead of myself, and I already searched within that driver module.

Alright, time to expand the search scope. I'm going to run that `rc38xxx` search again, but this time I'll make it case-insensitive. A quick scan of the results is what's in order, and then I can adjust as needed.

bad expression: fatal: -e option, '(?i)rc38xxx': Invalid preceding regular expression

{
  "Expression": "(?i)rc38xxx",
  "PathPrefix": ""
}

{
  "error": "bad expression: fatal: -e option, '(?i)rc38xxx': Invalid preceding regular expression"
}

gemini-3.1-pro-preview

null

null

							input: 63657
							output: 38
							thoughts: 40
						

Okay, here's my take on those thoughts, framed as my own mental process, given my expertise:

**Git Grep RegEx Woes and a Quick Hack**

Alright, so I'm trying to be clever with `git grep` and its extended regex support, but I just hit a snag. Damn, it seems like the standard extended regex flags, specifically the case-insensitive `(?i)` flag, *aren't* supported. I was hoping to keep the query concise and readable, but it's not playing ball. No worries, though, it's a minor inconvenience. I can easily work around this limitation. Instead of relying on a dedicated case-insensitive flag, I'll need to explicitly specify all the case variations of the characters in the search term. For "rc38xxx", that means constructing a regex like `[rR][cC]38[xX][xX][xX]`. That'll cover all the case permutations I need and, although a bit more verbose, it'll get the job done efficiently and accurately. Not ideal, but a quick and effective workaround. Now, back to what I was doing...

{
  "Expression": "[rR][cC]38[xX][xX][xX]",
  "PathPrefix": ""
}

{
  "Output": "drivers/ptp/ptp_fc3.c-19-#include \u003clinux/mfd/rsmu.h\u003e\ndrivers/ptp/ptp_fc3.c:20:#include \u003clinux/mfd/idtRC38xxx_reg.h\u003e\ndrivers/ptp/ptp_fc3.c-21-#include \u003clinux/unaligned.h\u003e\n--\ndrivers/ptp/ptp_fc3.c=1002=static struct platform_driver idtfc3_driver = {\ndrivers/ptp/ptp_fc3.c-1003-\t.driver = {\ndrivers/ptp/ptp_fc3.c:1004:\t\t.name = \"rc38xxx-phc\",\ndrivers/ptp/ptp_fc3.c-1005-\t},\n--\ninclude/linux/mfd/idtRC38xxx_reg.h-6- */\ninclude/linux/mfd/idtRC38xxx_reg.h:7:#ifndef MFD_IDTRC38XXX_REG\ninclude/linux/mfd/idtRC38xxx_reg.h:8:#define MFD_IDTRC38XXX_REG\ninclude/linux/mfd/idtRC38xxx_reg.h-9-\n"
}

gemini-3.1-pro-preview

null

null

							input: 64299
							output: 28
							thoughts: 46
						

Okay, here's my take on those thoughts, framed as an expert's internal monologue:

**Investigating the idtRC38xxx Driver**

Right, let's start with `include/linux/mfd/idtRC38xxx_reg.h`. This suggests we're dealing with an MFD (Multifunction Device) and specifically, a register map for an IDT RC38xxx device. My first instinct is to zero in on the driver itself. I'll need to locate the driver code, which will likely reside under `drivers/mfd/`. Now, the key is to determine how the driver is named. I'll search for either `idtRC38xxx` or the shorter, more common abbreviation, `RC38`. The goal is to find the core driver files and get a handle on the device's functionality and how it's integrated within the kernel. Time to dig in and find the implementation details.

no matches

{
  "Expression": "RC38",
  "PathPrefix": "drivers/mfd/"
}

{
  "error": "no matches"
}

gemini-3.1-pro-preview

null

null

							input: 64591
							output: 35
							thoughts: 97
						

**Investigating the `rc38xxx-phc` Driver Instantiation**

Okay, hold on a second. Something isn't clicking. If there isn't a Memory-Function Device (MFD) driver that explicitly brings up `rc38xxx-phc`, then how on earth is this driver getting probed? This feels like a critical piece of information I'm missing.

My first thought is, could this be handled by some out-of-tree patch that never made it into the mainstream kernel? That’s always a possibility, given the breadth of projects I’ve seen. Alternatively, I'm missing something, right? Is it brought up by `drivers/mfd/rsmu_core.c` in a patch I overlooked?

Alright, let's go back and re-examine `drivers/mfd/rsmu_core.c` with fresh eyes. I need to be absolutely certain I haven't missed a crucial detail there. I have to find out how that instantiation is happening.

no matches

{
  "Expression": "rc38xxx",
  "PathPrefix": "drivers/mfd/rsmu_core.c"
}

{
  "error": "no matches"
}

gemini-3.1-pro-preview

null

null

							input: 64954
							output: 33
							thoughts: 22
						

Here's my thought process, as if I were considering that code:

**Diving into the RSFU Core for FC3**

Okay, so we need to track down how `fc3` is handled, and the natural place to start is the heart of the RSFU driver – that's the `drivers/mfd/rsmu_core.c` file. Given the structure of these types of systems, I'm expecting to find the central management logic there. I'm imagining there's probably a device tree binding involved as well, but this is the logical first stop to understand how `fc3` is being treated. I suspect that either it is a supported feature and I will find its relevant code, or it is not yet, and I'll find a 'to do' flag or error message. Time to get the grep on! Let's see what we can dig up.

no matches

{
  "Expression": "fc3",
  "PathPrefix": "drivers/mfd/rsmu_core.c"
}

{
  "error": "no matches"
}

gemini-3.1-pro-preview

null

null

							input: 65213
							output: 34
							thoughts: 23
						

Here's my thought process, summarized as you requested:

**Investigating the RC38 Driver Issue**

Okay, so the issue seems to be related to the `RC38` functionality, and I need to figure out what's going on. Given that, my first step is to dive right into the likely source code for that, which is going to be `drivers/mfd/rsmu_core.c`. This file seems the most logical place where the core driver for the related hardware will be implemented. I will start by examining the code here.

no matches

{
  "Expression": "RC38",
  "PathPrefix": "drivers/mfd/rsmu_core.c"
}

{
  "error": "no matches"
}

gemini-3.1-pro-preview

null

null

							input: 65403
							output: 36
							thoughts: 25
						

Here's a first-person summary, tailored for an expert audience, based on the provided text:

**Focusing on RSmu I2C Driver for RC38**

Okay, so I need to investigate something related to the `RC38` functionality. My initial thought is to go straight to the relevant driver, which in this case would be `drivers/mfd/rsmu_i2c.c`. That's where I'd expect to find the low-level I2C communication logic specific to the RSmu (Remote System Management Unit) and, critically, any code associated with handling the `RC38` register or function. Time to dive in and see what's actually in there, and if it's the right driver to look for `RC38`.

no matches

{
  "Expression": "RC38",
  "PathPrefix": "drivers/mfd/rsmu_i2c.c"
}

{
  "error": "no matches"
}

gemini-3.1-pro-preview

null

null

							input: 65646
							output: 34
							thoughts: 23
						

Here's my thought process, summarized as if I were considering the given prompt:

**Investigating the RC38 Component**

Okay, so the prompt is asking me to start by checking `drivers/mfd/rsmu_spi.c` and specifically look for anything related to "RC38". Given my expertise, I'm immediately thinking this likely involves a specific register or functionality associated with the RSMU (presumably a multi-function device) through an SPI interface. The "RC38" could be a register name, a specific bitfield within a register, or even a preprocessor define that points to some related configuration. My first assumption is that "RC38" is probably a register or register-related setting that I need to investigate in that specific driver file. Therefore I should start to look at that file to see if I can find the register's usage.

no matches

{
  "Expression": "RC38",
  "PathPrefix": "drivers/mfd/rsmu_spi.c"
}

{
  "error": "no matches"
}

gemini-3.1-pro-preview

null

null

							input: 65902
							output: 36
							thoughts: 27
						

Here's my thought process, summarized as you requested:

**Navigating the RSMU_FC3 Code Landscape**

Okay, before diving too deep, I should probably double-check the usual suspects. Let's see... *RSMU_FC3*. That sounds like it might be something handled within the driver code. Right, so where would I expect to find the most relevant information on that? The likely place to start is the `drivers/mfd/` directory, specifically focusing on the `rsmu_core.c` file, since "RSMU" is likely the module's name. I need to make sure I'm not missing anything obvious in there first. Let's start with that and then I can refine my search based on what I find.

no matches

{
  "Expression": "RSMU_FC3",
  "PathPrefix": "drivers/mfd/rsmu_core.c"
}

{
  "error": "no matches"
}

gemini-3.1-pro-preview

null

null

							input: 66142
							output: 36
							thoughts: 25
						

Okay, here's my take on those thoughts, framed as an expert's internal monologue:

**Investigating `RSMU_FC3` in the Context of `mfd/rsmu.h`**

Alright, time to get to the core of this. My initial instinct is to dig into the `include/linux/mfd/rsmu.h` header file. That's the logical place to start when I'm dealing with something related to the RSMU (presumably a Mixed Signal Unit or similar, judging by the path). I want to see if this `RSMU_FC3` is defined there. I'm hoping it's a simple macro or enum value that gives me a baseline understanding of what we're talking about. Is it a flag, a register offset, a specific function code... I need that immediate context. This header is the likely source of truth, and understanding its definition is the key to understanding the next steps. I'll be looking for things like bitfields, register addresses, and any associated documentation or comments that describe its purpose or function.

no matches

{
  "Expression": "RSMU_FC3",
  "PathPrefix": "include/linux/mfd/rsmu.h"
}

{
  "error": "no matches"
}

gemini-3.1-pro-preview

null

null

							input: 66446
							output: 35
							thoughts: 24
						

Okay, let's dive into this. Here's my thought process on what we're looking at, summarized as though I were working through it:

**Investigating `rc38xxx` within the RSMU Framework**

Right, so the task at hand seems to be to investigate the `rc38xxx` device within the context of the `rsmu` (likely "Register-Based Subsystem Management Unit" or something similar) framework. My immediate instinct is to start by looking at the header file, specifically `include/linux/mfd/rsmu.h`. That's where I'd expect to find the core definitions, structures, and potentially function prototypes related to the `rsmu` driver. I'm hoping to understand how devices like `rc38xxx` are managed, registered, and interacted with within this architecture. The header file will most likely contain the fundamental data structures used to represent the RSMU registers and their associated meanings. I'll be looking for clues on how the driver handles device enumeration, power management, and interrupt handling, if applicable. My ultimate goal is to understand how `rc38xxx` integrates into this subsystem – maybe it's a specific device supported by the RSMU, or maybe it's just a related piece of hardware that utilizes the RSMU for some functionality. Time to start digging!

no matches

{
  "Expression": "rc38xxx",
  "PathPrefix": "include/linux/mfd/rsmu.h"
}

{
  "error": "no matches"
}

gemini-3.1-pro-preview

null

null

							input: 66802
							output: 37
							thoughts: 20
						

Here's my thought process, as if I were considering that header file:

**Investigating `include/linux/mfd/rsmu.h`**

Okay, hold on a second. Before we proceed further, let's take a quick look at `include/linux/mfd/rsmu.h`. We're dealing with a specific subsystem, and understanding its underlying data structures and potential definitions is crucial before diving into the core logic. This header is likely to hold the fundamental building blocks of how this multi-function device is architected within the kernel, its registers, and any related structures. What configurations or control mechanisms does it define? Are there vendor-specific aspects we should be aware of, perhaps defined using preprocessor macros? I need to quickly grasp the relevant data model. It's important to build this foundation before making any assumptions or jumping to conclusions, because the overall implementation will be more clear when viewed in the correct context.

{
  "File": "include/linux/mfd/rsmu.h",
  "FirstLine": 1,
  "LineCount": 60
}

{
  "Contents": "   1:\t/* SPDX-License-Identifier: GPL-2.0+ */\n   2:\t/*\n   3:\t * Core interface for Renesas Synchronization Management Unit (SMU) devices.\n   4:\t *\n   5:\t * Copyright (C) 2021 Integrated Device Technology, Inc., a Renesas Company.\n   6:\t */\n   7:\t\n   8:\t#ifndef __LINUX_MFD_RSMU_H\n   9:\t#define __LINUX_MFD_RSMU_H\n  10:\t\n  11:\t#define RSMU_MAX_WRITE_COUNT\t(255)\n  12:\t#define RSMU_MAX_READ_COUNT\t(255)\n  13:\t\n  14:\t/* The supported devices are ClockMatrix, Sabre and SnowLotus */\n  15:\tenum rsmu_type {\n  16:\t\tRSMU_CM\t\t= 0x34000,\n  17:\t\tRSMU_SABRE\t= 0x33810,\n  18:\t\tRSMU_SL\t\t= 0x19850,\n  19:\t};\n  20:\t\n  21:\t/**\n  22:\t * struct rsmu_ddata - device data structure for sub devices.\n  23:\t *\n  24:\t * @dev:    i2c/spi device.\n  25:\t * @regmap: i2c/spi bus access.\n  26:\t * @lock:   mutex used by sub devices to make sure a series of\n  27:\t *          bus access requests are not interrupted.\n  28:\t * @type:   RSMU device type.\n  29:\t * @page:   i2c/spi bus driver internal use only.\n  30:\t */\n  31:\tstruct rsmu_ddata {\n  32:\t\tstruct device *dev;\n  33:\t\tstruct regmap *regmap;\n  34:\t\tstruct mutex lock;\n  35:\t\tenum rsmu_type type;\n  36:\t\tu32 page;\n  37:\t};\n  38:\t#endif /*  __LINUX_MFD_RSMU_H */\n"
}

gemini-3.1-pro-preview

null

null

							input: 67613
							output: 37
							thoughts: 50
						

Here's my summary, as the expert:

**Investigating the RSMU Type Enumeration**

Okay, so I'm looking at this `enum rsmu_type`. I've got `RSMU_CM`, `RSMU_SABRE`, and `RSMU_SL` defined in there. I need to refresh my memory on the interactions of these types. I need to double-check their role, and so I should go back to the source code for the driver. Specifically, that file in `drivers/mfd/rsmu_core.c` is where the core logic will be. I need to see how these `rsmu_type` values are used within that driver. It's time to dig into the implementation details and understand the specific behavior associated with each of these enum members.

{
  "File": "drivers/mfd/rsmu_core.c",
  "FirstLine": 1,
  "LineCount": 60
}

{
  "Contents": "   1:\t// SPDX-License-Identifier: GPL-2.0+\n   2:\t/*\n   3:\t * Core driver for Renesas Synchronization Management Unit (SMU) devices.\n   4:\t *\n   5:\t * Copyright (C) 2021 Integrated Device Technology, Inc., a Renesas Company.\n   6:\t */\n   7:\t\n   8:\t#include \u003clinux/init.h\u003e\n   9:\t#include \u003clinux/kernel.h\u003e\n  10:\t#include \u003clinux/mfd/core.h\u003e\n  11:\t#include \u003clinux/mfd/rsmu.h\u003e\n  12:\t#include \u003clinux/module.h\u003e\n  13:\t#include \u003clinux/of.h\u003e\n  14:\t#include \u003clinux/regmap.h\u003e\n  15:\t#include \u003clinux/slab.h\u003e\n  16:\t\n  17:\t#include \"rsmu.h\"\n  18:\t\n  19:\tenum {\n  20:\t\tRSMU_PHC = 0,\n  21:\t\tRSMU_CDEV = 1,\n  22:\t\tRSMU_N_DEVS = 2,\n  23:\t};\n  24:\t\n  25:\tstatic struct mfd_cell rsmu_cm_devs[] = {\n  26:\t\t[RSMU_PHC] = {\n  27:\t\t\t.name = \"8a3400x-phc\",\n  28:\t\t},\n  29:\t\t[RSMU_CDEV] = {\n  30:\t\t\t.name = \"8a3400x-cdev\",\n  31:\t\t},\n  32:\t};\n  33:\t\n  34:\tstatic struct mfd_cell rsmu_sabre_devs[] = {\n  35:\t\t[RSMU_PHC] = {\n  36:\t\t\t.name = \"82p33x1x-phc\",\n  37:\t\t},\n  38:\t\t[RSMU_CDEV] = {\n  39:\t\t\t.name = \"82p33x1x-cdev\",\n  40:\t\t},\n  41:\t};\n  42:\t\n  43:\tstatic struct mfd_cell rsmu_sl_devs[] = {\n  44:\t\t[RSMU_PHC] = {\n  45:\t\t\t.name = \"8v19n85x-phc\",\n  46:\t\t},\n  47:\t\t[RSMU_CDEV] = {\n  48:\t\t\t.name = \"8v19n85x-cdev\",\n  49:\t\t},\n  50:\t};\n  51:\t\n  52:\tint rsmu_core_init(struct rsmu_ddata *rsmu)\n  53:\t{\n  54:\t\tstruct mfd_cell *cells;\n  55:\t\tint ret;\n  56:\t\n  57:\t\tswitch (rsmu-\u003etype) {\n  58:\t\tcase RSMU_CM:\n  59:\t\t\tcells = rsmu_cm_devs;\n  60:\t\t\tbreak;\n"
}

gemini-3.1-pro-preview

null

null

							input: 68670
							output: 27
							thoughts: 48
						

Okay, let me think this through.

**Digging Deeper into the Code**

Hmm, I was just looking at `rsmu_core.c` and realized it doesn't appear to be the place where the `rc38xxx-phc` module is actually instantiated. That's unexpected. I should have caught that earlier.

Right, time to broaden the search. I need to go back and thoroughly re-examine the entire codebase for any mention or use of `rc38xxx-phc`. Maybe I overlooked something during the initial scan. It's easy to miss a crucial detail in a complex project. Let's make sure I didn't jump to a conclusion too quickly and leave no stone unturned. I'll utilize my expert search skills to ensure a comprehensive overview.

{
  "Expression": "rc38xxx-phc",
  "PathPrefix": ""
}

{
  "Output": "drivers/ptp/ptp_fc3.c=1002=static struct platform_driver idtfc3_driver = {\ndrivers/ptp/ptp_fc3.c-1003-\t.driver = {\ndrivers/ptp/ptp_fc3.c:1004:\t\t.name = \"rc38xxx-phc\",\ndrivers/ptp/ptp_fc3.c-1005-\t},\n"
}

gemini-3.1-pro-preview

null

null

							input: 69036
							output: 26
							thoughts: 205
						

**Analyzing Potential Probe Paths for the RC38xxx-PHC Driver**

Okay, hold on a second. If the `rc38xxx-phc` driver isn't instantiated directly in the code, the question becomes, how is it actually being *probed*? How is the system finding it? I need to trace the initialization path. My first thought is, could there be a device tree node with `compatible = "idt,rc38xxx-phc"`? That seems like the most obvious route.

But then I remember platform drivers sometimes rely on matching by name if they *don't* have an `of_match_table` defined. Now, if I *do* find a DT node with that `compatible` string, I'm trying to recall how the OF (Open Firmware) core handles that… Will the OF core automatically create a platform device with the name `rc38xxx-phc` after stripping the vendor prefix? No, that's not quite right. The OF core actually creates platform devices using the full node name or compatible string, though it's the `of_device_id` field that drives the actual match. Still, the kernel might use an alternative match. Wait, it could still match by name *if* there's no `of_match_table` *and* the device tree node's `compatible` string is *just* `"rc38xxx-phc"` - without the "idt," vendor prefix.

Alright, before I spend too much more time on this, I need a quick sanity check. I should see if there are any mentions of the base `rc38xxx` prefix anywhere in the `arch/` directory. That's a good starting point to narrow the search.

no matches

{
  "Expression": "rc38xxx",
  "PathPrefix": "arch/"
}

{
  "error": "no matches"
}

gemini-3.1-pro-preview

null

null

							input: 69655
							output: 33
							thoughts: 22
						

Here's my thought process, summarized as you requested:

**Device Tree Binding Investigation**

Okay, so I need to figure out the bindings for this `rc38xxx` device. My first instinct, as always, is to dive straight into the source of truth for all things Device Tree: the kernel documentation. Specifically, I'll start by checking the standard location for device tree bindings, which I know is in the `Documentation/devicetree/bindings/` directory within the kernel source. That's where all the standardized information should be. I'll start there and see what I can find. It's the logical starting point for any DT-related investigation.

no matches

{
  "Expression": "rc38xxx",
  "PathPrefix": "Documentation/devicetree/bindings/"
}

{
  "error": "no matches"
}

gemini-3.1-pro-preview

null

null

							input: 69867
							output: 25
							thoughts: 69
						

**Investigating a Potentially Missing MFD Part in a New Driver**

Okay, so I'm seeing something here that's not quite right. If this object isn't being instantiated anywhere, the first thing that jumps to my mind is: could this be a *new* driver where the Multi-Function Device (MFD) component is simply not hooked up yet? That's a classic gotcha, especially when dealing with hardware drivers.

But hold on... I need to double-check my assumptions. Let's see... ah, the suspected patch is in `drivers/ptp/ptp_fc3.c`. Right, that helps narrow things down. Now, let's immediately look at the commit history for that file. See what changes have been made recently, any related commits, and see if there are any clues about why this part might be missing. That commit history should tell the tale. Let's dig in and see what we can find.

{
  "Expression": "ptp_fc3",
  "PathPrefix": ""
}

{
  "Output": "drivers/ptp/Kconfig=175=config PTP_1588_CLOCK_FC3W\n--\ndrivers/ptp/Kconfig-184-\t  To compile this driver as a module, choose M here: the module\ndrivers/ptp/Kconfig:185:\t  will be called ptp_fc3.\ndrivers/ptp/Kconfig-186-\n--\ndrivers/ptp/Makefile=16=obj-$(CONFIG_PTP_1588_CLOCK_IDTCM)\t+= ptp_clockmatrix.o\ndrivers/ptp/Makefile:17:obj-$(CONFIG_PTP_1588_CLOCK_FC3W)\t+= ptp_fc3.o\ndrivers/ptp/Makefile-18-obj-$(CONFIG_PTP_1588_CLOCK_IDT82P33)\t+= ptp_idt82p33.o\n--\ndrivers/ptp/ptp_fc3.c-23-#include \"ptp_private.h\"\ndrivers/ptp/ptp_fc3.c:24:#include \"ptp_fc3.h\"\ndrivers/ptp/ptp_fc3.c-25-\n"
}

gemini-3.1-pro-preview

null

null

							input: 70471
							output: 35
							thoughts: 32
						

Okay, here's my interpretation of those thoughts, tailored for an expert audience, presented in the first person:

**Navigating the PTP Landscape**

Right, `CONFIG_PTP_1588_CLOCK_FC3W`. That immediately triggers a mental checklist. Time to drill down. First stop, the obvious: I need to refresh my memory on where this lives in the configuration ecosystem. Let's get into `drivers/ptp/Kconfig`. That's where the definition and dependencies for that specific feature should reside. I want to understand its scope, any hardware dependencies, and how it interacts with other PTP components. Need to figure out the architectural context for this.

{
  "File": "drivers/ptp/Kconfig",
  "FirstLine": 170,
  "LineCount": 20
}

{
  "Contents": " 170:\t\t  is connected to the IDT chip.\n 171:\t\n 172:\t\t  To compile this driver as a module, choose M here: the module\n 173:\t\t  will be called ptp_clockmatrix.\n 174:\t\n 175:\tconfig PTP_1588_CLOCK_FC3W\n 176:\t\ttristate \"RENESAS FemtoClock3 Wireless as PTP clock\"\n 177:\t\tdepends on PTP_1588_CLOCK \u0026\u0026 I2C\n 178:\t\tdefault n\n 179:\t\thelp\n 180:\t\t  This driver adds support for using Renesas FemtoClock3 Wireless\n 181:\t\t  as a PTP clock. This clock is only useful if your time stamping\n 182:\t\t  MAC is connected to the RENESAS chip.\n 183:\t\n 184:\t\t  To compile this driver as a module, choose M here: the module\n 185:\t\t  will be called ptp_fc3.\n 186:\t\n 187:\tconfig PTP_1588_CLOCK_MOCK\n 188:\t\ttristate \"Mock-up PTP clock\"\n 189:\t\tdepends on PTP_1588_CLOCK\n"
}

gemini-3.1-pro-preview

null

null

							input: 71021
							output: 27
							thoughts: 73
						

**Digging into the PTP Clock Dependency**

Okay, so I see this `depends on PTP_1588_CLOCK && I2C` condition. Right, that makes sense. But the file, `ptp_fc3.c`, that I'm looking at, is a platform driver, which suggests it's tied to specific hardware. Now, where is it actually being *used*? I need to figure out the instantiation and connections. Let me go back and re-examine `drivers/mfd/rsmu_core.c`. I know that area deals with the Multiple Function Device (MFD) framework. Is there *another* file in `drivers/mfd/` that might be creating and hooking up this driver? It’s likely a companion or a controller driver in the MFD context. Time to scan that directory for potential clues.

{
  "Expression": "fc3",
  "PathPrefix": "drivers/mfd/"
}

{
  "Output": "drivers/mfd/cs47l85-tables.c=354=static const struct reg_default cs47l85_reg_default[] = {\n--\ndrivers/mfd/cs47l85-tables.c-1566-\t{ 0x00000fc2, 0x0000 }, /* R4034 (0xfc2) - ANC Coefficient */\ndrivers/mfd/cs47l85-tables.c:1567:\t{ 0x00000fc3, 0x0000 }, /* R4035 (0xfc3) - ANC Coefficient */\ndrivers/mfd/cs47l85-tables.c-1568-\t{ 0x00000fc4, 0x0000 }, /* R4036 (0xfc4) - ANC Coefficient */\n--\ndrivers/mfd/cs47l90-tables.c=71=static const struct reg_default cs47l90_reg_default[] = {\n--\ndrivers/mfd/cs47l90-tables.c-1253-\t{ 0x00000fc2, 0x0000 }, /* R4034 (0xfc2) - ANC Coefficient */\ndrivers/mfd/cs47l90-tables.c:1254:\t{ 0x00000fc3, 0x0000 }, /* R4035 (0xfc3) - ANC Coefficient */\ndrivers/mfd/cs47l90-tables.c-1255-\t{ 0x00000fc4, 0x0000 }, /* R4036 (0xfc4) - ANC Coefficient */\n"
}

gemini-3.1-pro-preview

null

null

							input: 71757
							output: 42
							thoughts: 53
						

**Diving into the PTP Implementation**

Okay, hold on a second. My eyes just snagged on something interesting in `ptp_fc3.c`. It's including `linux/mfd/idtRC38xxx_reg.h`. That immediately piques my curiosity. I know that header file is likely defining registers for a specific Multi-Function Device (MFD) - probably an IDT RC38xxx or something similar. Given the context of PTP, this implies this specific FC3 implementation might be talking directly to this particular IDT device for some hardware timestamping or synchronization mechanism. So, before I go any further down this rabbit hole, I need to understand what's in that include file. I'm going to jump over to `include/linux/mfd/idtRC38xxx_reg.h` and take a look at the register definitions. Understanding these registers is going to be key to interpreting the behavior of `ptp_fc3.c` with this device. It's time to dig into the hardware interaction.

{
  "File": "include/linux/mfd/idtRC38xxx_reg.h",
  "FirstLine": 1,
  "LineCount": 20
}

{
  "Contents": "   1:\t/* SPDX-License-Identifier: GPL-2.0+ */\n   2:\t/*\n   3:\t * Register Map - Based on PolarBear_CSRs.RevA.xlsx (2023-04-21)\n   4:\t *\n   5:\t * Copyright (C) 2023 Integrated Device Technology, Inc., a Renesas Company.\n   6:\t */\n   7:\t#ifndef MFD_IDTRC38XXX_REG\n   8:\t#define MFD_IDTRC38XXX_REG\n   9:\t\n  10:\t/* GLOBAL */\n  11:\t#define SOFT_RESET_CTRL\t\t(0x15) /* Specific to FC3W */\n  12:\t#define MISC_CTRL\t\t(0x14) /* Specific to FC3A */\n  13:\t#define APLL_REINIT\t\tBIT(1)\n  14:\t#define APLL_REINIT_VFC3A\tBIT(2)\n  15:\t\n  16:\t#define DEVICE_ID\t\t(0x2)\n  17:\t#define DEVICE_ID_MASK\t\t(0x1000) /* Bit 12 is 1 if FC3W and 0 if FC3A */\n  18:\t#define DEVICE_ID_SHIFT\t\t(12)\n  19:\t\n  20:\t/* FOD */\n"
}

gemini-3.1-pro-preview

null

null

							input: 72428
							output: 29
							thoughts: 67
						

Here's my thought process, as requested:

**Investigating the Platform Device Creation**

Okay, so `ptp_fc3.c` is flagged as a platform driver. The first question that pops into my head is, *what's generating this platform device?* Is it possible that another driver is responsible for creating this device entry? It’s not necessarily a self-contained unit.

My initial hunch is that it might be an I2C driver within the `drivers/ptp/` directory. Given the nature of Precision Time Protocol (PTP) devices, I'd expect there to be a certain degree of standardization or re-use within that directory. Let's see if there's any mention of `rc38xxx` or anything of the sort within that directory. I'll need to drill down into `drivers/ptp/` and look for clues.

{
  "Expression": "rc38xxx",
  "PathPrefix": "drivers/ptp/"
}

{
  "Output": "drivers/ptp/ptp_fc3.c=1002=static struct platform_driver idtfc3_driver = {\ndrivers/ptp/ptp_fc3.c-1003-\t.driver = {\ndrivers/ptp/ptp_fc3.c:1004:\t\t.name = \"rc38xxx-phc\",\ndrivers/ptp/ptp_fc3.c-1005-\t},\n"
}

gemini-3.1-pro-preview

null

null

							input: 72834
							output: 28
							thoughts: 22
						

Okay, here's my take on those thoughts, tailored for an expert audience:

**Kernel Subsystem Hunt - Where Did That Time Drift Hide?**

Right, let me see... I've got this gnawing feeling I should've already checked something, specifically around time synchronization and drift. I distinctly remember diving into `drivers/ptp/` already. That felt like a reasonable place to start, given the Precision Time Protocol's involvement. It's usually the first spot to look when dealing with this kind of issue.

Hold on, though... *clk*! That's it! Clock sources, clock frameworks… that's where the real underlying timekeeping is handled. `drivers/clk/` is the next obvious place to go digging. Any subtle clock rate changes or drift introduced there could manifest as time discrepancies later. I need to make a mental note to not overlook clock framework settings or drivers. Let's start there.

no matches

{
  "Expression": "rc38xxx",
  "PathPrefix": "drivers/clk/"
}

{
  "error": "no matches"
}

gemini-3.1-pro-preview

null

null

							input: 73096
							output: 30
							thoughts: 26
						

Okay, here's my take on those thoughts, framed as an expert's internal monologue:

**Investigating Driver Dependencies**

Right, let's see, where are we with this issue? My first instinct, based on similar problems I've tackled, is to systematically explore potential driver dependencies. I've already scrutinized the `drivers/mfd/` directory; I remember that one specifically. I needed to know if any of the hardware had a specific feature enabled as part of a MFD. What about the I2C bus? Now, `drivers/i2c/` is certainly a likely candidate. We're often dealing with that level of communication. I need to dive in there and see if there are relevant drivers or configurations related to the problematic device, I'll start with the likely devices, and then check any other dependencies or related drivers. I'm thinking I'll need to work through this methodically.

no matches

{
  "Expression": "rc38xxx",
  "PathPrefix": "drivers/i2c/"
}

{
  "error": "no matches"
}

gemini-3.1-pro-preview

null

null

							input: 73362
							output: 28
							thoughts: 9
						

Okay, here's my interpretation of that thought process, tailored for an expert audience, and written in the first person:

**Navigating the SPI Landscape**

Alright, so I'm thinking about the system architecture here. We're looking at drivers, and immediately my mind jumps to a specific directory within the code base. What about the `drivers/spi/` directory? That seems like a critical location to consider, right? The Serial Peripheral Interface (SPI) is a pervasive communication protocol, and that directory likely holds implementations for a variety of SPI controllers and connected devices. This could be relevant for a wide range of devices we're examining, and knowing the specifics there will likely be important for any diagnosis, modification or further work.

no matches

{
  "Expression": "rc38xxx",
  "PathPrefix": "drivers/spi/"
}

{
  "error": "no matches"
}

gemini-3.1-pro-preview

null

null

							input: 73566
							output: 27
							thoughts: 883
						

**Analyzing the Driver Instantiation and Reachability**

Okay, so I'm looking at this patch in `drivers/ptp/ptp_fc3.c` and I'm a bit concerned. If the driver isn't instantiated, how can it be reached for testing, especially with syzkaller? I'm thinking, is it being instantiated somewhere else, like maybe in `drivers/mfd/rsmu_core.c`? Perhaps a missing patch is the culprit. Hmm, no, this patch I'm reviewing modifies `drivers/ptp/ptp_fc3.c`.

Right, if the driver isn't instantiated as a platform device, the syzkaller will have a hard time fuzzing it. Can syzkaller even register platform devices? It can if there's a user-space interface, but typically those devices are created by the kernel itself. I don't recall seeing a `syz_platform_device_register` syscall or anything similar.

So, if it's not instantiated, is the code even reachable? I need to figure out where `idtfc3_enable_ptp` is called. Ah, it's called from `idtfc3_probe`. If `idtfc3_probe` is never called, then the code is effectively dead. Okay, time to check if `rc38xxx-phc` or `fc3` is instantiated by `drivers/mfd/idt8a340_reg.c` or any other relevant mfd driver. I'll search the tree for `fc3` in the `drivers/mfd/` directory.

{
  "Expression": "fc3",
  "PathPrefix": "drivers/mfd/"
}

{
  "Output": "drivers/mfd/cs47l85-tables.c=354=static const struct reg_default cs47l85_reg_default[] = {\n--\ndrivers/mfd/cs47l85-tables.c-1566-\t{ 0x00000fc2, 0x0000 }, /* R4034 (0xfc2) - ANC Coefficient */\ndrivers/mfd/cs47l85-tables.c:1567:\t{ 0x00000fc3, 0x0000 }, /* R4035 (0xfc3) - ANC Coefficient */\ndrivers/mfd/cs47l85-tables.c-1568-\t{ 0x00000fc4, 0x0000 }, /* R4036 (0xfc4) - ANC Coefficient */\n--\ndrivers/mfd/cs47l90-tables.c=71=static const struct reg_default cs47l90_reg_default[] = {\n--\ndrivers/mfd/cs47l90-tables.c-1253-\t{ 0x00000fc2, 0x0000 }, /* R4034 (0xfc2) - ANC Coefficient */\ndrivers/mfd/cs47l90-tables.c:1254:\t{ 0x00000fc3, 0x0000 }, /* R4035 (0xfc3) - ANC Coefficient */\ndrivers/mfd/cs47l90-tables.c-1255-\t{ 0x00000fc4, 0x0000 }, /* R4036 (0xfc4) - ANC Coefficient */\n"
}

gemini-3.1-pro-preview

null

null

							input: 75276
							output: 29
							thoughts: 44
						

**Navigating the Linux Kernel's MFD Subsystem**

Okay, so I've stumbled upon `include/linux/mfd/idtRC38xxx_reg.h`. My immediate thought is, "What's the context here?" This suggests something related to the MFD (Multi-Function Device) subsystem, likely tied to an IDT RC38xxx component. To get the full picture, I need to know the extent of its usage. Let's fire up a tree-wide search for that specific header file, `idtRC38xxx_reg.h`. That'll give me the references, the relationships, the whole story within the kernel's source. This is the first step in understanding the device's role and how it integrates into the broader system.

{
  "Expression": "idtRC38xxx_reg.h",
  "PathPrefix": ""
}

{
  "Output": "drivers/ptp/ptp_fc3.c-19-#include \u003clinux/mfd/rsmu.h\u003e\ndrivers/ptp/ptp_fc3.c:20:#include \u003clinux/mfd/idtRC38xxx_reg.h\u003e\ndrivers/ptp/ptp_fc3.c-21-#include \u003clinux/unaligned.h\u003e\n"
}

gemini-3.1-pro-preview

null

null

							input: 75617
							output: 34
							thoughts: 112
						

**Investigating the Driver Landscape for this PTP Implementation**

Okay, first things first. It seems this functionality is *only* defined within `drivers/ptp/ptp_fc3.c`? That's... interesting. I was expecting a more modular approach, perhaps with an MFD driver. It seems there isn't one. Right, so is the communication protocol I2C or SPI? Let me quickly check the same file for any I2C or SPI driver definitions within `drivers/ptp/ptp_fc3.c`. I did already check `idtfc3_driver`, which is a `platform_driver`, but I need to be thorough. I need to make sure I am not missing anything, so let's make sure that there isn't anything else defined in `drivers/ptp/ptp_fc3.c`.

{
  "Expression": "module_",
  "PathPrefix": "drivers/ptp/ptp_fc3.c"
}

{
  "Output": "drivers/ptp/ptp_fc3.c=35=static char *firmware;\ndrivers/ptp/ptp_fc3.c:36:module_param(firmware, charp, 0);\ndrivers/ptp/ptp_fc3.c-37-\n--\ndrivers/ptp/ptp_fc3.c=1002=static struct platform_driver idtfc3_driver = {\n--\ndrivers/ptp/ptp_fc3.c-1009-\ndrivers/ptp/ptp_fc3.c:1010:module_platform_driver(idtfc3_driver);\n"
}

gemini-3.1-pro-preview

null

null

							input: 76115
							output: 26
							thoughts: 147
						

**Analyzing the Platform Driver and Potential Device Tree Interactions**

Okay, so I'm looking at this driver and it's flagged as a platform driver. My immediate thought is, "Right, it's *just* a platform driver." Now, if this is truly *only* a platform driver, and no other piece of kernel code explicitly creates a platform device named `rc38xxx-phc`, then this thing will *never* get probed. That's a huge red flag!

But hold on, before I jump to any conclusions, I need to consider a common scenario in modern kernel development. Could the platform device be created via Device Tree? Could there be a Device Tree node that has `compatible = "idt,rc38xxx-phc"`? If so, the OF (Open Firmware) core will translate that node into a platform device with the name `rc38xxx-phc`. Bingo! That would explain how this driver could actually attach.

Right, time to put on my detective hat. I need to quickly scan the Device Tree source directories. Specifically, I need to check `arch/arm64/boot/dts/` and `arch/arm/boot/dts/` to see if there's any mention of `rc38xxx`. That'll confirm whether the Device Tree route is the key here. It could be under another name, so I'll need to do a thorough search, but that's the next logical step.

no matches

{
  "Expression": "rc38xxx",
  "PathPrefix": "arch/"
}

{
  "error": "no matches"
}

gemini-3.1-pro-preview

null

null

							input: 76615
							output: 23
							thoughts: 534
						

**Analyzing the Mysterious Platform Device**

Okay, so I'm chasing a platform device named `rc38xxx-phc`. It's not showing up in my usual suspects. Initially, I thought the MFD driver might be the key, but a quick grep didn't reveal any direct matches within the standard `rsmu` files. I checked `drivers/mfd/rsmu_core.c` again, noting the `rsmu_cm_devs` array, but nothing there either. I looked into the related `RSMU_CM`, `RSMU_SABRE`, and `RSMU_SL` variants, still no joy.

My immediate thought was maybe there's a patch to `rsmu_i2c.c` or `rsmu_spi.c` I'm not seeing, but I'm checking the HEAD commit, so if it's not in the tree, it's not there. Hmm, could this be an out-of-tree module? Syzkaller, which is what I'm using, doesn't test those. So that's probably not it.

Next, I wondered if syzkaller could be conjuring this device through some pseudo-syscall, like `syz_platform_device_register`. Nope, that doesn't exist. Maybe it creates platform devices by writing to `/sys/bus/platform/drivers_probe`, but that just probes existing devices. No luck there either. There's `platform_device_register` in some test modules, but not with arbitrary names.

Alright, maybe it's not a platform device at all, or it is being created by a different mechanism. Could it be an `i2c_new_client_device`? That creates I2C devices, which I know it isn't, so that's a dead end. Perhaps it's `mfd_add_devices` in another driver? Time to broaden the search. I did a more thorough search with `rc38xxx` case-insensitively, and that only turned up `ptp_fc3.c` and `idtRC38xxx_reg.h`.

Okay, what about a broader search for "fc3"? Looking for `fc3w` or `FC3W` next. Let's see what that uncovers. This is going to require more digging.

{
  "Expression": "FC3W",
  "PathPrefix": ""
}

{
  "Output": "drivers/ptp/Kconfig=163=config PTP_1588_CLOCK_IDTCM\n--\ndrivers/ptp/Kconfig-174-\ndrivers/ptp/Kconfig:175:config PTP_1588_CLOCK_FC3W\ndrivers/ptp/Kconfig-176-\ttristate \"RENESAS FemtoClock3 Wireless as PTP clock\"\n--\ndrivers/ptp/Makefile=16=obj-$(CONFIG_PTP_1588_CLOCK_IDTCM)\t+= ptp_clockmatrix.o\ndrivers/ptp/Makefile:17:obj-$(CONFIG_PTP_1588_CLOCK_FC3W)\t+= ptp_fc3.o\ndrivers/ptp/Makefile-18-obj-$(CONFIG_PTP_1588_CLOCK_IDT82P33)\t+= ptp_idt82p33.o\n--\ndrivers/ptp/ptp_fc3.c=820=static int idtfc3_enable_ptp(struct idtfc3 *idtfc3)\n--\ndrivers/ptp/ptp_fc3.c-824-\tidtfc3-\u003ecaps = idtfc3_caps;\ndrivers/ptp/ptp_fc3.c:825:\tsnprintf(idtfc3-\u003ecaps.name, sizeof(idtfc3-\u003ecaps.name), \"IDT FC3W\");\ndrivers/ptp/ptp_fc3.c-826-\terr = idtfc3_set_overhead(idtfc3);\n--\ninclude/linux/mfd/idtRC38xxx_reg.h-10-/* GLOBAL */\ninclude/linux/mfd/idtRC38xxx_reg.h:11:#define SOFT_RESET_CTRL\t\t(0x15) /* Specific to FC3W */\ninclude/linux/mfd/idtRC38xxx_reg.h-12-#define MISC_CTRL\t\t(0x14) /* Specific to FC3A */\n--\ninclude/linux/mfd/idtRC38xxx_reg.h-16-#define DEVICE_ID\t\t(0x2)\ninclude/linux/mfd/idtRC38xxx_reg.h:17:#define DEVICE_ID_MASK\t\t(0x1000) /* Bit 12 is 1 if FC3W and 0 if FC3A */\ninclude/linux/mfd/idtRC38xxx_reg.h-18-#define DEVICE_ID_SHIFT\t\t(12)\n--\ninclude/linux/mfd/idtRC38xxx_reg.h-28-/* TDCAPLL */\ninclude/linux/mfd/idtRC38xxx_reg.h:29:#define TDC_CTRL\t\t(0x44a) /* Specific to FC3W */\ninclude/linux/mfd/idtRC38xxx_reg.h-30-#define TDC_ENABLE_CTRL\t\t(0x169) /* Specific to FC3A */\n--\ninclude/linux/mfd/idtRC38xxx_reg.h-43-/* TIME SYNC CHANNEL */\ninclude/linux/mfd/idtRC38xxx_reg.h:44:#define TIME_CLOCK_SRC\t\t(0xa01) /* Specific to FC3W */\ninclude/linux/mfd/idtRC38xxx_reg.h:45:#define TIME_CLOCK_COUNT\t(0xa00) /* Specific to FC3W */\ninclude/linux/mfd/idtRC38xxx_reg.h-46-#define TIME_CLOCK_COUNT_MASK\tGENMASK(5, 0)\n--\ninclude/linux/mfd/idtRC38xxx_reg.h=197=enum fw_version {\ninclude/linux/mfd/idtRC38xxx_reg.h-198-\tV_DEFAULT = 0,\ninclude/linux/mfd/idtRC38xxx_reg.h:199:\tVFC3W     = 1,\ninclude/linux/mfd/idtRC38xxx_reg.h-200-\tVFC3A     = 2\n"
}

gemini-3.1-pro-preview

null

null

							input: 78685
							output: 36
							thoughts: 114
						

**Analyzing the Device Driver Landscape**

Okay, so I'm looking at `ptp_fc3.c`... right, it's a *platform* driver. That's the key. If there's no MFD (Multi-Function Device) driver out there that specifically instantiates an `rc38xxx-phc` device, then there's absolutely no way this `ptp_fc3.c` driver is going to be probed and initialized. It's dependent on that platform device being present.

Now, I need to check my assumptions here. Is there another route for a platform device's creation that I'm missing? Could something *else* be responsible for creating the `rc38xxx-phc`? Let's rule things out systematically. The file itself doesn't seem to create it, as it's a driver for a platform device. What about `drivers/ptp/ptp_clockmatrix.c`? Does that handle it? That's the next place to look for instantiation. I need to understand how the platform device is registered.

no matches

{
  "Expression": "rc38xxx",
  "PathPrefix": "drivers/ptp/ptp_clockmatrix.c"
}

{
  "error": "no matches"
}

gemini-3.1-pro-preview

null

null

							input: 79084
							output: 40
							thoughts: 26
						

Okay, here's my take on those thoughts, framed as an expert's internal monologue:

**Investigating the PTP Driver**

Alright, let's see... the question is about the PTP driver, specifically `drivers/ptp/ptp_idt82p33.c`. My immediate thought is, does *this* specific driver actually instantiate the necessary hardware device? Is it responsible for creating the PTP hardware instance within the kernel's device tree or however the system handles device registration? I need to quickly determine if this file, this particular driver, is the architect or the support system in this scenario. It's a key question when dealing with hardware drivers and how they interface with the broader system. I have to figure out if the function of this driver is to create the hardware to begin with, or if it is merely the software interface.

no matches

{
  "Expression": "rc38xxx",
  "PathPrefix": "drivers/ptp/ptp_idt82p33.c"
}

{
  "error": "no matches"
}

gemini-3.1-pro-preview

null

null

							input: 79346
							output: 25
							thoughts: 42
						

**Initial Assessment of the Code**

Okay, so I'm looking through this code and my eye immediately lands on `include/linux/mfd/idtRC38xxx_reg.h`. That's interesting, and it suggests a Multilevel Function Device (MFD) driver interaction with an `idtRC38xxx` component. My first thought is: let's dig deeper. The inclusion of this header immediately signals a potential MFD driver involvement. My expertise screams, "Where's the corresponding driver?" Is there a registered driver specifically crafted to manage the `idtRC38xxx` device through the MFD framework? This is the core question that needs answering, and I need to explore the kernel source to find it. Time to start looking for the driver.

{
  "Expression": "idtRC38xxx",
  "PathPrefix": ""
}

{
  "Output": "drivers/ptp/ptp_fc3.c-19-#include \u003clinux/mfd/rsmu.h\u003e\ndrivers/ptp/ptp_fc3.c:20:#include \u003clinux/mfd/idtRC38xxx_reg.h\u003e\ndrivers/ptp/ptp_fc3.c-21-#include \u003clinux/unaligned.h\u003e\n"
}

gemini-3.1-pro-preview

null

null

							input: 79677
							output: 32
							thoughts: 164
						

**Investigating the Origin of `idtRC38xxx_reg.h`**

Okay, so I'm looking at this code and I see `include/linux/mfd/idtRC38xxx_reg.h` is only included by `ptp_fc3.c`. That's a little unusual, I'd expect more usage of a header like that. The key here is, where did this header file come from? I need to trace its addition.

I can't directly check the `git log` of the header to understand its history. However, I can logically assume it was added within the same patch series as the MFD driver that likely *uses* this register definition. So, if I'm thinking about MFD drivers, it would have been added with the driver, yes?

If I can't find that MFD driver... oh, wait, is it possible the driver isn't called something obvious like `idtRC38xxx`? Perhaps it's named based on the function, like `idt-fc3` or something similar?

Alright, time to check `drivers/mfd/Makefile`. This is the place to start looking for the driver's build instructions, and from that I should get the name. Hopefully, this will lead me to the driver that actually uses this header.

{
  "File": "drivers/mfd/Makefile",
  "FirstLine": 1,
  "LineCount": 50
}

{
  "Contents": "   1:\t# SPDX-License-Identifier: GPL-2.0\n   2:\t#\n   3:\t# Makefile for multifunction miscellaneous devices\n   4:\t#\n   5:\t\n   6:\t88pm860x-objs\t\t\t:= 88pm860x-core.o 88pm860x-i2c.o\n   7:\tobj-$(CONFIG_MFD_88PM860X)\t+= 88pm860x.o\n   8:\tobj-$(CONFIG_MFD_88PM800)\t+= 88pm800.o 88pm80x.o\n   9:\tobj-$(CONFIG_MFD_88PM805)\t+= 88pm805.o 88pm80x.o\n  10:\tobj-$(CONFIG_MFD_88PM886_PMIC)\t+= 88pm886.o\n  11:\tobj-$(CONFIG_MFD_ACT8945A)\t+= act8945a.o\n  12:\tobj-$(CONFIG_MFD_SM501)\t\t+= sm501.o\n  13:\tobj-$(CONFIG_ARCH_BCM2835)\t+= bcm2835-pm.o\n  14:\tobj-$(CONFIG_MFD_BCM590XX)\t+= bcm590xx.o\n  15:\tobj-$(CONFIG_MFD_BD9571MWV)\t+= bd9571mwv.o\n  16:\tobj-$(CONFIG_MFD_BQ257XX)\t+= bq257xx.o\n  17:\tobj-$(CONFIG_MFD_CGBC)\t\t+= cgbc-core.o\n  18:\tobj-$(CONFIG_MFD_CROS_EC_DEV)\t+= cros_ec_dev.o\n  19:\tobj-$(CONFIG_MFD_CS42L43)\t+= cs42l43.o\n  20:\tobj-$(CONFIG_MFD_CS42L43_I2C)\t+= cs42l43-i2c.o\n  21:\tobj-$(CONFIG_MFD_CS42L43_SDW)\t+= cs42l43-sdw.o\n  22:\tobj-$(CONFIG_MFD_ENE_KB3930)\t+= ene-kb3930.o\n  23:\tobj-$(CONFIG_MFD_EXYNOS_LPASS)\t+= exynos-lpass.o\n  24:\tobj-$(CONFIG_MFD_GATEWORKS_GSC)\t+= gateworks-gsc.o\n  25:\tobj-$(CONFIG_MFD_MACSMC)\t+= macsmc.o\n  26:\t\n  27:\tobj-$(CONFIG_MFD_TI_LP873X)\t+= lp873x.o\n  28:\tobj-$(CONFIG_MFD_TI_LP87565)\t+= lp87565.o\n  29:\tobj-$(CONFIG_MFD_TI_AM335X_TSCADC)\t+= ti_am335x_tscadc.o\n  30:\t\n  31:\tobj-$(CONFIG_MFD_STMPE)\t\t+= stmpe.o\n  32:\tobj-$(CONFIG_STMPE_I2C)\t\t+= stmpe-i2c.o\n  33:\tobj-$(CONFIG_STMPE_SPI)\t\t+= stmpe-spi.o\n  34:\tobj-$(CONFIG_MFD_SUN6I_PRCM)\t+= sun6i-prcm.o\n  35:\tobj-$(CONFIG_MFD_TC3589X)\t+= tc3589x.o\n  36:\tobj-$(CONFIG_MFD_TQMX86)\t+= tqmx86.o\n  37:\t\n  38:\tobj-$(CONFIG_MFD_LOCHNAGAR)\t+= lochnagar-i2c.o\n  39:\t\n  40:\tarizona-objs\t\t\t:= arizona-core.o arizona-irq.o\n  41:\tobj-$(CONFIG_MFD_ARIZONA)\t+= arizona.o\n  42:\tobj-$(CONFIG_MFD_ARIZONA_I2C)\t+= arizona-i2c.o\n  43:\tobj-$(CONFIG_MFD_ARIZONA_SPI)\t+= arizona-spi.o\n  44:\tifeq ($(CONFIG_MFD_WM5102),y)\n  45:\tarizona-objs\t\t\t+= wm5102-tables.o\n  46:\tendif\n  47:\tifeq ($(CONFIG_MFD_WM5110),y)\n  48:\tarizona-objs\t\t\t+= wm5110-tables.o\n  49:\tendif\n  50:\tifeq ($(CONFIG_MFD_WM8997),y)\n"
}

gemini-3.1-pro-preview

null

null

							input: 81429
							output: 35
							thoughts: 1622
						

**Analyzing the Reachability of `ptp_fc3.c` in a Syzkaller Environment**

Okay, so I'm trying to figure out if this `ptp_fc3.c` driver is actually testable with syzkaller. I know `rsmu` is related and found in `drivers/mfd/Makefile` so I started there. My initial thought was that if the Multi-Function Device (MFD) driver isn't present, the platform device associated with `ptp_fc3.c` won't be created, and thus, the `idtfc3_probe` function wouldn't be called. If that's the case, syzkaller is blocked!

I then considered that syzkaller needs some way to instantiate the platform device, which it can't do for platform devices without some explicit interface like `mac80211_hwsim` for wifi or `vkms` for DRM.

I thought, "What if `ptp_fc3.c` is meant to be instantiated via the device tree?" A device tree would require an `of_match_table`. But the file doesn't have one! However, a `platform_driver` can match by name. So, if a device tree node had `compatible = "rc38xxx-phc"`, the OF core would create a platform device named the same, `rc38xxx-phc`. The driver's name is actually `rc38xxx-phc`, but if the device tree had `compatible = "vendor,rc38xxx-phc"`, the device name would be the same.

Unfortunately, syzkaller's not set up to do that. It doesn't dynamically add device tree nodes. It tests on x86_64 with ACPI, or arm64 with a fixed device tree. So, I figured, this driver is probably not testable within the current syzkaller setup.

I wondered, is there some other way? Is there a sysfs interface to create platform devices? Nope. I looked in `/sys/bus/platform/devices/`, but no, you can't create devices there from userspace. I also checked `drivers/base/platform.c` for `platform_device_register`. Nope, syzkaller can't trigger it.

I then shifted focus. Maybe the patch is just a refactoring of an existing driver?

I re-examined the patch. It seems like it's a bug fix related to the timing of `ptp_schedule_worker`. In the old code, `ptp_clock_register` happened first, and then `idtfc3_init_timecounter` was called, which then called `ptp_schedule_worker`. In the new code, the order is changed, `idtfc3_init_timecounter` is now called *before* `ptp_clock_register` so `idtfc3->ptp_clock` is either NULL or uninitialized when `idtfc3_init_timecounter` is called. Ahh, but wait. `idtfc3_init_timecounter` doesn't *use* the `idtfc3->ptp_clock` anymore. `ptp_schedule_worker` was moved out of it. I get it, the change moves `ptp_schedule_worker` out of `idtfc3_init_timecounter` so that `idtfc3_init_timecounter` can be called before `ptp_clock_register`.

So, back to the main question: can this code even be reached in syzkaller? If there's no MFD driver creating the `rc38xxx-phc`, then `idtfc3_probe` isn't called. Hmmm...is it possible I missed something in `rsmu_core.c`? Gotta check that again.

no matches

{
  "Expression": "rc38xxx",
  "PathPrefix": "drivers/mfd/rsmu_core.c"
}

{
  "error": "no matches"
}

gemini-3.1-pro-preview

null

null

							input: 83932
							output: 24
							thoughts: 35
						

Okay, here's my summarized thought process, presented as if I were working through the problem myself, tailored for an expert audience:

**Troubleshooting a Potential Driver Conflict**

Damn, that's not the result I was expecting. It's not behaving as it should. Okay, so this means the assumption about the driver is wrong, at least in its current state. My instinct now is that something else is interfering; perhaps another driver is unexpectedly claiming control or colliding in some way. I need to be sure. I'll need to exhaustively search the entire code tree to verify that *rc38xxx* is not being incorrectly invoked or used. I'll search with the exact string `rc38xxx` to make sure I am finding the correct matches. Let's see what's really happening.

{
  "Expression": "rc38xxx",
  "PathPrefix": ""
}

{
  "Output": "drivers/ptp/ptp_fc3.c=1002=static struct platform_driver idtfc3_driver = {\ndrivers/ptp/ptp_fc3.c-1003-\t.driver = {\ndrivers/ptp/ptp_fc3.c:1004:\t\t.name = \"rc38xxx-phc\",\ndrivers/ptp/ptp_fc3.c-1005-\t},\n"
}

gemini-3.1-pro-preview

null

null

							input: 84283
							output: 39
							thoughts: 197
						

**Debugging a Missing Driver Probe**

Okay, so I'm staring at this driver and it's just *not* probing. I've checked everywhere I can think of, and I'm positive there isn't a corresponding device registered in the platform device tree for this specific driver name, `"rc38xxx-phc"`. No `platform_device_register`, no `mfd_add_devices` with that name, nothing in the device tree either. So, logically, the `probe` function should *never* get called. It just won't happen that way.

But hold on... Could this device be instantiated dynamically through I2C from userspace? I recall something about creating devices on the fly using I2C... Right, there's that `echo "rsmu-i2c 0x68" > /sys/bus/i2c/devices/i2c-0/new_device` incantation. But wait a minute, `rsmu-i2c` is the *I2C driver* name, not a platform device! Okay, then, that's what I should be looking at. I'll need to go dig into `rsmu_i2c.c` now to see what's really going on here.

{
  "Expression": "rsmu-i2c",
  "PathPrefix": "drivers/mfd/rsmu_i2c.c"
}

{
  "Output": "drivers/mfd/rsmu_i2c.c=354=static struct i2c_driver rsmu_i2c_driver = {\ndrivers/mfd/rsmu_i2c.c-355-\t.driver = {\ndrivers/mfd/rsmu_i2c.c:356:\t\t.name = \"rsmu-i2c\",\ndrivers/mfd/rsmu_i2c.c-357-\t\t.of_match_table = rsmu_i2c_of_match,\n"
}

gemini-3.1-pro-preview

null

null

							input: 84936
							output: 41
							thoughts: 42
						

Okay, here's my interpretation of that thought process, assuming I'm already deep in kernel debugging and familiar with syzkaller and i2c drivers:

**Analyzing the `rsmu-i2c` Interaction**

Right, so syzkaller is going to try to instantiate the `rsmu-i2c` device. That means it will, in all likelihood, call `rsmu_i2c_probe`. I need to confirm that's the path of execution. Assuming it does, then `rsmu_i2c_probe` is where I need to focus my attention. It's the entry point to investigate what the driver is doing during its initialization sequence in this syzkaller-triggered scenario. Let's dig into `rsmu_i2c_probe` and see what it reveals.

{
  "File": "drivers/mfd/rsmu_i2c.c",
  "FirstLine": 270,
  "LineCount": 50
}

{
  "Contents": " 270:\tstatic int rsmu_i2c_probe(struct i2c_client *client)\n 271:\t{\n 272:\t\tconst struct i2c_device_id *id = i2c_client_get_device_id(client);\n 273:\t\tconst struct regmap_config *cfg;\n 274:\t\tstruct rsmu_ddata *rsmu;\n 275:\t\tint ret;\n 276:\t\n 277:\t\trsmu = devm_kzalloc(\u0026client-\u003edev, sizeof(*rsmu), GFP_KERNEL);\n 278:\t\tif (!rsmu)\n 279:\t\t\treturn -ENOMEM;\n 280:\t\n 281:\t\ti2c_set_clientdata(client, rsmu);\n 282:\t\n 283:\t\trsmu-\u003edev = \u0026client-\u003edev;\n 284:\t\trsmu-\u003etype = (enum rsmu_type)id-\u003edriver_data;\n 285:\t\n 286:\t\tswitch (rsmu-\u003etype) {\n 287:\t\tcase RSMU_CM:\n 288:\t\t\tif (i2c_check_functionality(client-\u003eadapter, I2C_FUNC_I2C)) {\n 289:\t\t\t\tcfg = \u0026rsmu_i2c_cm_regmap_config;\n 290:\t\t\t} else if (i2c_check_functionality(client-\u003eadapter,\n 291:\t\t\t\t\t\t\t   I2C_FUNC_SMBUS_I2C_BLOCK)) {\n 292:\t\t\t\tcfg = \u0026rsmu_smbus_i2c_cm_regmap_config;\n 293:\t\t\t} else {\n 294:\t\t\t\tdev_err(rsmu-\u003edev, \"Unsupported i2c adapter\\n\");\n 295:\t\t\t\treturn -ENOTSUPP;\n 296:\t\t\t}\n 297:\t\t\tbreak;\n 298:\t\tcase RSMU_SABRE:\n 299:\t\t\tcfg = \u0026rsmu_sabre_regmap_config;\n 300:\t\t\tbreak;\n 301:\t\tcase RSMU_SL:\n 302:\t\t\tcfg = \u0026rsmu_sl_regmap_config;\n 303:\t\t\tbreak;\n 304:\t\tdefault:\n 305:\t\t\tdev_err(rsmu-\u003edev, \"Unsupported RSMU device type: %d\\n\", rsmu-\u003etype);\n 306:\t\t\treturn -ENODEV;\n 307:\t\t}\n 308:\t\n 309:\t\tif (rsmu-\u003etype == RSMU_CM)\n 310:\t\t\trsmu-\u003eregmap = devm_regmap_init(\u0026client-\u003edev, NULL, client, cfg);\n 311:\t\telse\n 312:\t\t\trsmu-\u003eregmap = devm_regmap_init_i2c(client, cfg);\n 313:\t\n 314:\t\tif (IS_ERR(rsmu-\u003eregmap)) {\n 315:\t\t\tret = PTR_ERR(rsmu-\u003eregmap);\n 316:\t\t\tdev_err(rsmu-\u003edev, \"Failed to allocate register map: %d\\n\", ret);\n 317:\t\t\treturn ret;\n 318:\t\t}\n 319:\t\n"
}

gemini-3.1-pro-preview

null

null

							input: 86034
							output: 41
							thoughts: 190
						

**Analyzing the RSMU I2C Probe and PHC Driver**

Okay, let's break this down. `rsmu_i2c_probe` kicks things off, calling `rsmu_core_init(rsmu)`. Right, and that `rsmu_core_init` function hinges on `rsmu->type` to determine which MFD cells to use. The types we're dealing with here are `RSMU_CM`, `RSMU_SABRE`, and `RSMU_SL`. None of these three types are designed to use the `rc38xxx-phc` driver.

So, even if syzkaller manages to instantiate `rsmu-i2c`, we're only ever going to end up with `8a3400x-phc`, `82p33x1x-phc`, or `8v19n85x-phc` instances. It’s impossible for it to generate an `rc38xxx-phc` instance this way.

But, hang on a second... Could `id->driver_data` be something other than the standard values? Maybe there's a loophole there? I need to check the definition of `rsmu_i2c_id` to be sure. It could be possible to sneak in the `rc38xxx-phc` through that route.

{
  "File": "drivers/mfd/rsmu_i2c.c",
  "FirstLine": 330,
  "LineCount": 20
}

{
  "Contents": " 330:\tstatic const struct i2c_device_id rsmu_i2c_id[] = {\n 331:\t\t{ \"8a34000\",  RSMU_CM },\n 332:\t\t{ \"8a34001\",  RSMU_CM },\n 333:\t\t{ \"8a34002\",  RSMU_CM },\n 334:\t\t{ \"82p33810\", RSMU_SABRE },\n 335:\t\t{ \"82p33811\", RSMU_SABRE },\n 336:\t\t{ \"8v19n850\", RSMU_SL },\n 337:\t\t{ \"8v19n851\", RSMU_SL },\n 338:\t\t{}\n 339:\t};\n 340:\tMODULE_DEVICE_TABLE(i2c, rsmu_i2c_id);\n 341:\t\n 342:\tstatic const struct of_device_id rsmu_i2c_of_match[] = {\n 343:\t\t{ .compatible = \"idt,8a34000\",  .data = (void *)RSMU_CM },\n 344:\t\t{ .compatible = \"idt,8a34001\",  .data = (void *)RSMU_CM },\n 345:\t\t{ .compatible = \"idt,8a34002\",  .data = (void *)RSMU_CM },\n 346:\t\t{ .compatible = \"idt,82p33810\", .data = (void *)RSMU_SABRE },\n 347:\t\t{ .compatible = \"idt,82p33811\", .data = (void *)RSMU_SABRE },\n 348:\t\t{ .compatible = \"idt,8v19n850\", .data = (void *)RSMU_SL },\n 349:\t\t{ .compatible = \"idt,8v19n851\", .data = (void *)RSMU_SL },\n"
}

gemini-3.1-pro-preview

null

null

							input: 87089
							output: 34
							thoughts: 213
						

**Debugging the RC38xxx-PHC Instantiation**

Okay, so I'm looking into why the `rsmu_i2c` driver isn't bringing up the `rc38xxx-phc` device. First, I checked `rsmu_i2c_id` and, as expected, there's no mention of `rc38xxx` or `fc3` there. That confirms my initial suspicion that `rsmu_i2c` isn't supposed to directly instantiate it.

The next logical step is to check if *any* other I2C driver is responsible for this. So, let's re-run the `rc38xxx` search within the `drivers/i2c/` directory – again, nothing. Same deal with `drivers/mfd/`, nothing comes up. Hmm. Now, I'm finding that the only mention is in `drivers/ptp/` and specifically in `ptp_fc3.c`. That's an interesting lead.

Could `ptp_fc3.c` be instantiated indirectly? I'll need to check the parent code. It's likely related to another driver. Let's dig into `ptp_clockmatrix.c` – I'll search for `rc38xxx`, `fc3`, and even `FC3` just to be thorough and see if there's any link there. Time to see if I can trace the instantiation path through the PTP subsystem.

no matches

{
  "Expression": "FC3",
  "PathPrefix": "drivers/ptp/ptp_clockmatrix.c"
}

{
  "error": "no matches"
}

gemini-3.1-pro-preview

null

null

							input: 87670
							output: 34
							thoughts: 18
						

Here's a summary of my thought process:

**Diving into PTP Clock Matrix Code**

Okay, so I need to find something related to `fc3`, and given the context, I'm going straight to the `ptp_clockmatrix.c` file. This seems like the most logical place to start digging. It's the central hub for handling clock matrix functionalities, so `fc3` should be handled somewhere within it. This is a pretty standard approach: specific keywords and functionalities often reside in dedicated source files. Let's see what we can find.

no matches

{
  "Expression": "fc3",
  "PathPrefix": "drivers/ptp/ptp_clockmatrix.c"
}

{
  "error": "no matches"
}

gemini-3.1-pro-preview

null

null

							input: 87858
							output: 38
							thoughts: 25
						

Okay, here's my interpretation of that thought process, tailored for an expert audience, and written in the first person:

**Unraveling the `ptp_fc3.c` Connection**

Hmm, just a moment... I need to take a step back and consider something specific about that `ptp_fc3.c` file. I'm wondering if its instantiation is somehow happening through, or perhaps being called upon by, `idt82p33`. The association between the two isn't immediately obvious, but it has the ring of something I need to evaluate. I need to figure out what the relationship here is. Does `idt82p33` include or reference `ptp_fc3.c`? Is there a dependency I need to fully grok? There are some things to unpack there before I can continue. I really need to get my head around this.

no matches

{
  "Expression": "fc3",
  "PathPrefix": "drivers/ptp/ptp_idt82p33.c"
}

{
  "error": "no matches"
}

gemini-3.1-pro-preview

null

null

							input: 88125
							output: 33
							thoughts: 63
						

Okay, let me think this through.

**Investigating the Instantiation of `ptp_fc3.c`**

Right, I'm trying to figure out where `ptp_fc3.c` is actually being brought into existence. My first thought was maybe `idt8a340_reg.c` is the culprit, since it seems related to register management. But hold on... that's just a header file, it can't directly instantiate anything. Okay, scratch that. Hmmm... What about `rsmu_spi.c`? That seems like a plausible link, but I need to investigate further to be sure. It involves SPI communication, and maybe it's connected to this part of the code somehow. I will need to delve deeper into the code to trace the calls and dependencies.

no matches

{
  "Expression": "fc3",
  "PathPrefix": "drivers/mfd/rsmu_spi.c"
}

{
  "error": "no matches"
}

gemini-3.1-pro-preview

null

null

							input: 88409
							output: 35
							thoughts: 27
						

Here's my thought process, summarized as you requested:

**A Potential Connection: Instantiation Dynamics**

Okay, I'm digging into this code, trying to understand the dependencies. I need to keep the big picture in mind, but also be granular enough to see the connections. Wait a second... what if this `ptp_fc3.c` module isn't just a standalone piece? What if it's actually instantiated *by* `rsmu_i2c.c`? That would change everything about how I need to approach this analysis. It's a key question that will impact the design decisions and potential impact. I need to look closer at the cross-referencing to confirm.

no matches

{
  "Expression": "fc3",
  "PathPrefix": "drivers/mfd/rsmu_i2c.c"
}

{
  "error": "no matches"
}

gemini-3.1-pro-preview

null

null

							input: 88634
							output: 33
							thoughts: 25
						

Here's my thought process, summarized as you requested:

**A Potential Dependency**

Hold on a second... I need to re-evaluate this. I was making an assumption, and I need to check my work. I was thinking about how `ptp_fc3.c` operates, but now I'm starting to think about its relationship to the rest of the system, particularly the higher-level modules. Could it be that `rsmu_core.c` is actually responsible for instantiating `ptp_fc3.c`? If so, that drastically changes my understanding of how data flows and how the modules interact. I need to trace the code and confirm this dependency before proceeding with any further analysis. The implications are significant, so I can't just brush this off.

no matches

{
  "Expression": "fc3",
  "PathPrefix": "drivers/mfd/rsmu_core.c"
}

{
  "error": "no matches"
}

gemini-3.1-pro-preview

null

null

							input: 88873
							output: 27
							thoughts: 28
						

Okay, here's my thought process on this, from my perspective:

**Kernel File Search - A Double-Check**

Right, hang on a second. I swear I ran through these files already, didn't I? I’m *certain* I already checked the obvious places, but it's always good to double-check. Just to be absolutely sure.

Okay, let's just cut to the chase, then. I need to be *sure*. Is there ANY file at all, within the entire kernel source tree, that contains that specific string? Specifically, the `rc38xxx-phc` string? I'll need to use the exact string, not a partial match or anything like that. This needs to be a focused search. Let's see what's out there.

{
  "Expression": "rc38xxx-phc",
  "PathPrefix": ""
}

{
  "Output": "drivers/ptp/ptp_fc3.c=1002=static struct platform_driver idtfc3_driver = {\ndrivers/ptp/ptp_fc3.c-1003-\t.driver = {\ndrivers/ptp/ptp_fc3.c:1004:\t\t.name = \"rc38xxx-phc\",\ndrivers/ptp/ptp_fc3.c-1005-\t},\n"
}

gemini-3.1-pro-preview

null

null

							input: 89220
							output: 23
							thoughts: 593
						

**Analyzing the Reachability of `ptp_fc3.c`**

Okay, let's break this down. My immediate focus is on `ptp_fc3.c`. The core question is whether the code within this file is actually reachable in a typical fuzzing environment.

First, I need to confirm that *nothing else* in the kernel, outside of `ptp_fc3.c`, deals with this `rc38xxx-phc` device name. If it's *only* defined within `ptp_fc3.c`, then nothing else is creating it.

Next, I'm thinking about how devices are brought into the system. It can't be a device tree entry since I searched `arch/` and found no `rc38xxx` entries. The fact that the driver uses a platform device makes me wonder about other potential device creation methods, since platform devices are relatively static.

I considered whether a userspace tool *dynamically* creates the device tree node but quickly dismissed this, as Syzkaller, which is the fuzzer in question, doesn't mess with device tree entries like this.

Could Syzkaller somehow create this platform device through its pseudo-syscalls? No, Syzkaller calls are not in the kernel but in the executor.

Now, the instructions say that if the patch contains unreachable code paths in a virtualized environment like QEMU, then it's WorthFuzzing=false. If this driver *cannot* be probed, then it's fundamentally unreachable.

I'm racking my brain. Is there *any* legitimate way to register a platform device from userspace in Linux? Nope, there's no generic mechanism for that.

Could some test module be using `platform_device_register`? I start thinking about the possibility of `drivers/platform/x86/` but realize that's x86-specific, which is not relevant here.

What about a PCI device triggering the creation? But if it *were* a PCI device, it would be a PCI driver, not a platform driver, so that wouldn't work. However, could a PCI driver create a *platform* device? I decide to search for instances of `rc38xxx` in `drivers/pci/` and `drivers/net/`, just to be certain. I remember that I've *already* searched the entire kernel tree for `rc38xxx`, and the only results are `ptp_fc3.c` and `idtRC38xxx_reg.h`.

So, *no other* kernel file mentions `rc38xxx`. This means *nothing else* can possibly create a platform device with the name `rc38xxx-phc`.

Could the name be constructed dynamically? A `sprintf(name, "%s-phc", "rc38xxx")` type of thing? I search the entire tree for `rc38`, to cover all possible variations of this name.

{
  "Expression": "rc38",
  "PathPrefix": ""
}

{
  "Output": "drivers/ptp/ptp_fc3.c=1002=static struct platform_driver idtfc3_driver = {\ndrivers/ptp/ptp_fc3.c-1003-\t.driver = {\ndrivers/ptp/ptp_fc3.c:1004:\t\t.name = \"rc38xxx-phc\",\ndrivers/ptp/ptp_fc3.c-1005-\t},\n"
}

gemini-3.1-pro-preview

null

null

							input: 90594
							output: 28
							thoughts: 44
						

Okay, let's see. My first thought is: **Okay, so `rc38` *only* appears to match `rc38xxx-phc` in that specific `ptp_fc3.c` file?** That seems a little narrow, doesn't it? I need to be absolutely sure I'm not missing something potentially related. The context there is very specific and it doesn't quite sit right.

Right, time to expand the net. Let's do a quick, *thorough* search for `rc38` in a case-insensitive manner. Case sensitivity might be hiding some relevant findings, especially within comments or less structured areas of the codebase. A quick case-insensitive scan should reveal any alternative uses or related mentions, regardless of capitalization.

{
  "Expression": "[rR][cC]38",
  "PathPrefix": ""
}

{
  "Output": "drivers/ptp/ptp_fc3.c-19-#include \u003clinux/mfd/rsmu.h\u003e\ndrivers/ptp/ptp_fc3.c:20:#include \u003clinux/mfd/idtRC38xxx_reg.h\u003e\ndrivers/ptp/ptp_fc3.c-21-#include \u003clinux/unaligned.h\u003e\n--\ndrivers/ptp/ptp_fc3.c=1002=static struct platform_driver idtfc3_driver = {\ndrivers/ptp/ptp_fc3.c-1003-\t.driver = {\ndrivers/ptp/ptp_fc3.c:1004:\t\t.name = \"rc38xxx-phc\",\ndrivers/ptp/ptp_fc3.c-1005-\t},\n--\ninclude/linux/mfd/idtRC38xxx_reg.h-6- */\ninclude/linux/mfd/idtRC38xxx_reg.h:7:#ifndef MFD_IDTRC38XXX_REG\ninclude/linux/mfd/idtRC38xxx_reg.h:8:#define MFD_IDTRC38XXX_REG\ninclude/linux/mfd/idtRC38xxx_reg.h-9-\n"
}

gemini-3.1-pro-preview

null

null

							input: 91151
							output: 35
							thoughts: 611
						

**Unreachable Code in Syzkaller: A Deep Dive**

Okay, so I'm looking at this code and, frankly, it seems completely unreachable within the syzkaller environment. The function `idtfc3_enable_ptp` is the target, but I can't see any obvious path to triggering it.

First thought: Where is this driver actually used? Is it even supposed to be merged? Maybe it's a WIP, and the MFD driver integration hasn't landed yet. Or could it be instantiated by some obscure, out-of-tree board file? If it's the latter, then it's effectively invisible to the mainline kernel, which means syzkaller can't even touch it. That's a huge problem.

Now, wait a minute, what about Device Tree (DT)? Could the device be instantiated via DT that is *user* provided? Syzkaller's known for using a fixed DT (or ACPI on x86) for fuzzing, so that's a dead end. Still unreachable.

Okay, let's trace this. `idtfc3_enable_ptp` is only called from `idtfc3_probe`.  And `idtfc3_probe` is, in turn, only called by the platform bus when a device matches the driver. Since there is no device that is matched, it's never called.

I double-checked `idtfc3_driver` source:

```c
static struct platform_driver idtfc3_driver = {
	.driver = {
		.name = "rc38xxx-phc",
	},
	.probe = idtfc3_probe,
	.remove = idtfc3_remove,
};
```

No `of_match_table` in there. So, it can only match by name. Wait, the Platform bus driver matching checks `compatible` value of DT node with the driver name `rc38xxx-phc`. But, again, syzkaller doesn't use custom DTs. Still inaccessible.

Is there *any* other driver that might register a platform device, using a module parameter or something where a name is passed in? Highly unlikely, but worth a thought. I'm going to check for dynamic name generation.

I just went through `rsmu_core.c`.
```c
static struct mfd_cell rsmu_cm_devs[] = {
	[RSMU_PHC] = {
		.name = "8a3400x-phc",
	},
...
```

Nope, just hardcoded names there.

Wait... could there be a typo? Maybe it should match `8a3400x-phc` instead? Maybe the MFD driver creates `8a3400x-phc`, and this driver was supposed to match it? But... I check `ptp_clockmatrix.c` and that one matches `8a3400x-phc`. So, no, that is a different driver.

Conclusion: This `idtfc3` driver is completely unreachable and untestable within syzkaller's current configuration. Time to investigate a possible upstream fix or consider it dead code for the time being.

{
  "Expression": "8a3400x-phc",
  "PathPrefix": "drivers/ptp/"
}

{
  "Output": "drivers/ptp/ptp_clockmatrix.c=2459=static struct platform_driver idtcm_driver = {\ndrivers/ptp/ptp_clockmatrix.c-2460-\t.driver = {\ndrivers/ptp/ptp_clockmatrix.c:2461:\t\t.name = \"8a3400x-phc\",\ndrivers/ptp/ptp_clockmatrix.c-2462-\t},\n"
}

gemini-3.1-pro-preview

null

null

							input: 92624
							output: 36
							thoughts: 53
						

Okay, here's my interpretation of those thoughts, framed as if they are my own:

**Matching Driver Implementations to Hardware**

Right, let me see... I've got to make sure these driver files are the correct ones for the hardware we're targeting. Okay, `ptp_clockmatrix.c` - yep, that one looks like it's designed to interface with the `8a3400x-phc` platform. Good, that's what I expected. And then `ptp_idt82p33.c`... ah, yes, that clearly lines up with the `82p33x1x-phc` device. Excellent, everything's aligning as it should. It's crucial to confirm these associations to ensure proper clock synchronization. Knowing these drivers, and their compatibility, is fundamental to the architecture.

{
  "Expression": "82p33x1x-phc",
  "PathPrefix": "drivers/ptp/"
}

{
  "Output": "drivers/ptp/ptp_idt82p33.c=1450=static struct platform_driver idt82p33_driver = {\ndrivers/ptp/ptp_idt82p33.c-1451-\t.driver = {\ndrivers/ptp/ptp_idt82p33.c:1452:\t\t.name = \"82p33x1x-phc\",\ndrivers/ptp/ptp_idt82p33.c-1453-\t},\n"
}

gemini-3.1-pro-preview

null

null

							input: 93043
							output: 38
							thoughts: 1117
						

**Unreachable Code Path Analysis**

Okay, so I'm looking at `ptp_fc3.c` and immediately, I'm thinking about how the `rc38xxx-phc` device gets created. My initial thought is this is for that specific hardware, but I'm reasonably sure there isn't an MFD driver that's creating it. I've already scanned the kernel tree extensively, and there's no `rc38xxx` device listed in the `drivers/mfd/` directory or anywhere else for that matter. Unless something got missed in a patch series, or a missing merge.

I started digging deeper. Is it possible this `rc38xxx-phc` is being created through I2C via `i2c_new_client_device` or a similar mechanism? But I know those are for I2C devices, not platform devices. Could it be hidden in some other subsystem via `mfd_add_devices`? I searched the whole tree for the string `"rc38xxx-phc"`, and nothing. That means this device is created *nowhere*.

So, if that's the case, then the `idtfc3_probe` function is unreachable. Logically, if the probe function is unreachable, then any code within that function is unreachable. That means `WorthFuzzing` should evaluate to `false`.

Now, let's review the patch itself to see if it modifies anything else. It seems like the diff only affects the `drivers/ptp/ptp_fc3.c` file. Since I believe `ptp_fc3.c` is not reached, this patch is unreachable as well.

To be sure, is there any *other* way to trigger a call to `idtfc3_enable_ptp`? It's a static function, so its scope is limited to that file. Looking at it, it's only called from `idtfc3_probe`. And that, in turn, is tied to the platform bus, specifically via the `idtfc3_driver`. That means it's only called when a device matches this driver. Because the device isn't created, this never happens.

Okay, let's consider edge cases. Could a device tree overlay created from userspace create the device? But Syzkaller doesn't use those. Could a sysfs attribute trigger it? There aren't generic ways to create platform devices through sysfs. There is `/sys/bus/platform/drivers_probe` but that only probes existing devices, and `/sys/devices/platform/`, but you can't create things there.

Therefore, under these conditions, this is completely unreachable in syzkaller.

Just to be thorough, I will read the entire `drivers/mfd/rsmu_core.c` file again to ensure I didn't miss something.

{
  "File": "drivers/mfd/rsmu_core.c",
  "FirstLine": 1,
  "LineCount": 100
}

{
  "Contents": "   1:\t// SPDX-License-Identifier: GPL-2.0+\n   2:\t/*\n   3:\t * Core driver for Renesas Synchronization Management Unit (SMU) devices.\n   4:\t *\n   5:\t * Copyright (C) 2021 Integrated Device Technology, Inc., a Renesas Company.\n   6:\t */\n   7:\t\n   8:\t#include \u003clinux/init.h\u003e\n   9:\t#include \u003clinux/kernel.h\u003e\n  10:\t#include \u003clinux/mfd/core.h\u003e\n  11:\t#include \u003clinux/mfd/rsmu.h\u003e\n  12:\t#include \u003clinux/module.h\u003e\n  13:\t#include \u003clinux/of.h\u003e\n  14:\t#include \u003clinux/regmap.h\u003e\n  15:\t#include \u003clinux/slab.h\u003e\n  16:\t\n  17:\t#include \"rsmu.h\"\n  18:\t\n  19:\tenum {\n  20:\t\tRSMU_PHC = 0,\n  21:\t\tRSMU_CDEV = 1,\n  22:\t\tRSMU_N_DEVS = 2,\n  23:\t};\n  24:\t\n  25:\tstatic struct mfd_cell rsmu_cm_devs[] = {\n  26:\t\t[RSMU_PHC] = {\n  27:\t\t\t.name = \"8a3400x-phc\",\n  28:\t\t},\n  29:\t\t[RSMU_CDEV] = {\n  30:\t\t\t.name = \"8a3400x-cdev\",\n  31:\t\t},\n  32:\t};\n  33:\t\n  34:\tstatic struct mfd_cell rsmu_sabre_devs[] = {\n  35:\t\t[RSMU_PHC] = {\n  36:\t\t\t.name = \"82p33x1x-phc\",\n  37:\t\t},\n  38:\t\t[RSMU_CDEV] = {\n  39:\t\t\t.name = \"82p33x1x-cdev\",\n  40:\t\t},\n  41:\t};\n  42:\t\n  43:\tstatic struct mfd_cell rsmu_sl_devs[] = {\n  44:\t\t[RSMU_PHC] = {\n  45:\t\t\t.name = \"8v19n85x-phc\",\n  46:\t\t},\n  47:\t\t[RSMU_CDEV] = {\n  48:\t\t\t.name = \"8v19n85x-cdev\",\n  49:\t\t},\n  50:\t};\n  51:\t\n  52:\tint rsmu_core_init(struct rsmu_ddata *rsmu)\n  53:\t{\n  54:\t\tstruct mfd_cell *cells;\n  55:\t\tint ret;\n  56:\t\n  57:\t\tswitch (rsmu-\u003etype) {\n  58:\t\tcase RSMU_CM:\n  59:\t\t\tcells = rsmu_cm_devs;\n  60:\t\t\tbreak;\n  61:\t\tcase RSMU_SABRE:\n  62:\t\t\tcells = rsmu_sabre_devs;\n  63:\t\t\tbreak;\n  64:\t\tcase RSMU_SL:\n  65:\t\t\tcells = rsmu_sl_devs;\n  66:\t\t\tbreak;\n  67:\t\tdefault:\n  68:\t\t\tdev_err(rsmu-\u003edev, \"Unsupported RSMU device type: %d\\n\", rsmu-\u003etype);\n  69:\t\t\treturn -ENODEV;\n  70:\t\t}\n  71:\t\n  72:\t\tmutex_init(\u0026rsmu-\u003elock);\n  73:\t\n  74:\t\tret = devm_mfd_add_devices(rsmu-\u003edev, PLATFORM_DEVID_AUTO, cells,\n  75:\t\t\t\t\t   RSMU_N_DEVS, NULL, 0, NULL);\n  76:\t\tif (ret \u003c 0)\n  77:\t\t\tdev_err(rsmu-\u003edev, \"Failed to register sub-devices: %d\\n\", ret);\n  78:\t\n  79:\t\treturn ret;\n  80:\t}\n  81:\tEXPORT_SYMBOL_GPL(rsmu_core_init);\n  82:\t\n  83:\tvoid rsmu_core_exit(struct rsmu_ddata *rsmu)\n  84:\t{\n  85:\t\tmutex_destroy(\u0026rsmu-\u003elock);\n  86:\t}\n  87:\tEXPORT_SYMBOL_GPL(rsmu_core_exit);\n  88:\t\n  89:\tMODULE_DESCRIPTION(\"Renesas SMU core driver\");\n  90:\tMODULE_LICENSE(\"GPL\");\n"
}

gemini-3.1-pro-preview

null

null

							input: 96029
							output: 169
							thoughts: 116
						

**Unreachable Code in Syzkaller for `rc38xxx-phc`**

Okay, so I've dug into this, and it's pretty clear: there's no `rc38xxx-phc` platform device being created in `rsmu_core.c`. I confirmed this; there's just no instantiation of it. Therefore, the code that's supposed to handle this specific driver is never going to get executed within the Syzkaller environment. I can see that the patch in question is effectively unreachable within Syzkaller's current configuration. The core issue is that while this driver is defined as a platform driver for `rc38xxx-phc`, the supporting MFD (multi-function device) part, or something similar, necessary to actually instantiate the device isn't present, or perhaps hasn't been integrated. Essentially, the prerequisite component is missing, leaving this section of code orphaned and un-fuzzable, based on the current kernel configuration I'm working with. So, my conclusion is definitely `WorthFuzzing: false`, as it's just not reachable.

{
  "EnableConfigs": [],
  "FocusSymbols": [],
  "Reasoning": "The patch modifies `drivers/ptp/ptp_fc3.c`, which is a platform driver matching the name `rc38xxx-phc`. However, there is no code in the kernel (e.g., in `drivers/mfd/rsmu_core.c` or any other MFD driver) that instantiates a platform device with this name, nor are there any device tree nodes with a matching compatible string. Since the device is never created, the driver's probe function (`idtfc3_probe`) and the modified code (`idtfc3_enable_ptp`) are completely unreachable in any environment, including syzkaller.",
  "WorthFuzzing": false
}

{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch modifies `drivers/ptp/ptp_fc3.c`, which is a platform driver matching the name `rc38xxx-phc`. However, there is no code in the kernel (e.g., in `drivers/mfd/rsmu_core.c` or any other MFD driver) that instantiates a platform device with this name, nor are there any device tree nodes with a matching compatible string. Since the device is never created, the driver's probe function (`idtfc3_probe`) and the modified code (`idtfc3_enable_ptp`) are completely unreachable in any environment, including syzkaller.",
  "WorthFuzzing": false
}