The AN8811HB comes in two package variants, AN8811HBCN and AN8811HBN, which use different GPIO pins to drive LED outputs. AN8811HBCN uses GPIOs 0, 1, and 15, while AN8811HBN uses GPIOs 3, 4, and 5. Using a fixed GPIO assignment causes incorrect LED behavior on one of the variants. Read the package variant from the read-only silicon identification bits in AN8811HB_HWTRAP2 at probe time and store it in priv->is_an8811hbcn. Add an8811hb_led_gpio_setup() to configure the correct GPIO output pins and select lines based on the detected variant, and call it from config_init. Signed-off-by: Weiting Lee --- v2 -> v3: - Rebase on top of net-next commit 3498acda6b68 ("net: phy: air_en8811h: restore AN8811HB LED GPIO after MCU restart") - an8811hb_led_gpio_setup() now covers the AN8811HBN (345) case that commit restored, replacing its direct GPIO_OUTPUT_345 restore call v1 -> v2: - Rename pkg_sel to is_an8811hbcn (bool) for clarity - Remove phydev_info log to avoid spamming the kernel log - Fix commit message: HWTRAP2 bits are read-only silicon identification, not a hardware strap pin v1: https://lore.kernel.org/netdev/20260827054156.2681908-1-weiting.lee@airoha.com/ v2: https://lore.kernel.org/netdev/20260828050537.2728253-1-weiting.lee@airoha.com/ drivers/net/phy/air_en8811h.c | 67 ++++++++++++++++++++++++++++++++--- 1 file changed, 63 insertions(+), 4 deletions(-) diff --git a/drivers/net/phy/air_en8811h.c b/drivers/net/phy/air_en8811h.c index 38eb18f0e9bb..ae24c41f538a 100644 --- a/drivers/net/phy/air_en8811h.c +++ b/drivers/net/phy/air_en8811h.c @@ -145,10 +145,22 @@ #define AN8811HB_GPIO_OUTPUT 0x5cf8b8 #define AN8811HB_GPIO_OUTPUT_345 (BIT(3) | BIT(4) | BIT(5)) +#define AN8811HB_GPIO_OUTPUT_0115 (BIT(0) | BIT(1) | BIT(15)) + +#define AN8811HB_GPIO_SEL1 0x5cf8bc +#define AN8811HB_GPIO_SEL1_0_MASK GENMASK(3, 0) +#define AN8811HB_GPIO_SEL1_1_MASK GENMASK(7, 4) +#define AN8811HB_GPIO_SEL1_0 BIT(0) +#define AN8811HB_GPIO_SEL1_1 0 + +#define AN8811HB_GPIO_SEL2 0x5cf8c0 +#define AN8811HB_GPIO_SEL2_15_MASK GENMASK(31, 28) +#define AN8811HB_GPIO_SEL2_15 BIT(29) #define AN8811HB_HWTRAP1 0x5cf910 #define AN8811HB_HWTRAP2 0x5cf914 #define AN8811HB_HWTRAP2_CKO BIT(28) +#define AN8811HB_HWTRAP2_PKG GENMASK(14, 12) #define AN8811HB_CLK_DRV 0x5cf9e4 #define AN8811HB_CLK_DRV_CKO_MASK GENMASK(14, 12) @@ -202,6 +214,7 @@ struct en8811h_priv { struct phy_device *phydev; unsigned int cko_is_enabled; struct mdio_device *pbusdev; + bool is_an8811hbcn; }; enum { @@ -1071,10 +1084,49 @@ static int en8811h_leds_setup(struct phy_device *phydev) return ret; } +static int an8811hb_led_gpio_setup(struct phy_device *phydev) +{ + struct en8811h_priv *priv = phydev->priv; + int ret; + + if (priv->is_an8811hbcn) { + /* AN8811HBCN: LED GPIOs are 0, 1, 15 */ + ret = air_phy_buckpbus_reg_modify(phydev, AN8811HB_GPIO_OUTPUT, + AN8811HB_GPIO_OUTPUT_0115, + AN8811HB_GPIO_OUTPUT_0115); + if (ret < 0) + return ret; + + ret = air_phy_buckpbus_reg_modify(phydev, AN8811HB_GPIO_SEL1, + AN8811HB_GPIO_SEL1_0_MASK | + AN8811HB_GPIO_SEL1_1_MASK, + AN8811HB_GPIO_SEL1_0 | + AN8811HB_GPIO_SEL1_1); + if (ret < 0) + return ret; + + ret = air_phy_buckpbus_reg_modify(phydev, AN8811HB_GPIO_SEL2, + AN8811HB_GPIO_SEL2_15_MASK, + AN8811HB_GPIO_SEL2_15); + if (ret < 0) + return ret; + } else { + /* AN8811HBN: LED GPIOs are 3, 4, 5 */ + ret = air_phy_buckpbus_reg_modify(phydev, AN8811HB_GPIO_OUTPUT, + AN8811HB_GPIO_OUTPUT_345, + AN8811HB_GPIO_OUTPUT_345); + if (ret < 0) + return ret; + } + + return 0; +} + static int an8811hb_probe(struct phy_device *phydev) { struct mdio_device *mdiodev; struct en8811h_priv *priv; + u32 reg_val; int ret; priv = devm_kzalloc(&phydev->mdio.dev, sizeof(struct en8811h_priv), @@ -1115,6 +1167,12 @@ static int an8811hb_probe(struct phy_device *phydev) /* MDIO_DEVS1/2 empty, so set mmds_present bits here */ phydev->c45_ids.mmds_present |= MDIO_DEVS_PMAPMD | MDIO_DEVS_AN; + /* Detect package variant */ + ret = air_phy_buckpbus_reg_read(phydev, AN8811HB_HWTRAP2, ®_val); + if (ret < 0) + goto err_dev_create; + priv->is_an8811hbcn = FIELD_GET(AN8811HB_HWTRAP2_PKG, reg_val); + ret = en8811h_leds_setup(phydev); if (ret < 0) goto err_dev_create; @@ -1263,10 +1321,11 @@ static int an8811hb_config_init(struct phy_device *phydev) return ret; } - /* Restore LED GPIO output enables after MCU initialization. */ - ret = air_phy_buckpbus_reg_modify(phydev, AN8811HB_GPIO_OUTPUT, - AN8811HB_GPIO_OUTPUT_345, - AN8811HB_GPIO_OUTPUT_345); + ret = an8811hb_led_gpio_setup(phydev); + if (ret < 0) { + phydev_err(phydev, "Failed to set up LED GPIO: %d\n", ret); + return ret; + } return ret; } -- 2.43.0