From: Ciprian Regus Add a driver for the ADIN1140's internal 10BASE-T1S PHY. The device doesn't implement autonegotiation, so the link is always reported as being up. The device implements both C22 and C45 MDIO access methods, but can only be discovered over C22, since the C45 MMD devices lack the MDIO_DEVID1 and MDIO_DEVID2 registers. The indirect C45 over C22 feature is not supported. Reviewed-by: Andrew Lunn Signed-off-by: Ciprian Regus --- v3 changelog: - no change v2 changelog: - No longer setting PHY_MAC_INTERRUPT in order to avoid state polling. - Replace the driver specific .read/write_mmd() functions with the ones exported from genphy. - Renamed the file to adin1140-phy.c in order to avoid module name conflicts with the adin1140 ethernet driver. --- MAINTAINERS | 7 ++++ drivers/net/phy/Kconfig | 6 ++++ drivers/net/phy/Makefile | 1 + drivers/net/phy/adin1140-phy.c | 72 ++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 86 insertions(+) diff --git a/MAINTAINERS b/MAINTAINERS index ca6c7425b45f..eda74f3154dc 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -1857,6 +1857,13 @@ S: Supported W: https://ez.analog.com/linux-software-drivers F: drivers/dma/dma-axi-dmac.c +ANALOG DEVICES INC ETHERNET PHY DRIVERS +M: Ciprian Regus +L: netdev@vger.kernel.org +S: Maintained +W: https://ez.analog.com/linux-software-drivers +F: drivers/net/phy/adin1140-phy.c + ANALOG DEVICES INC IIO DRIVERS M: Lars-Peter Clausen M: Michael Hennerich diff --git a/drivers/net/phy/Kconfig b/drivers/net/phy/Kconfig index 8b51bdc2e945..bd21a5dad366 100644 --- a/drivers/net/phy/Kconfig +++ b/drivers/net/phy/Kconfig @@ -124,6 +124,12 @@ config ADIN1100_PHY Currently supports the: - ADIN1100 - Robust,Industrial, Low Power 10BASE-T1L Ethernet PHY +config ADIN1140_PHY + tristate "Analog Devices ADIN1140 10BASE-T1S PHY" + help + Adds support for the Analog Devices, Inc. ADIN1140's internal + 10BASE-T1S PHY. + config AMCC_QT2025_PHY tristate "AMCC QT2025 PHY" depends on RUST_PHYLIB_ABSTRACTIONS diff --git a/drivers/net/phy/Makefile b/drivers/net/phy/Makefile index 05e4878af27a..73152845b0b2 100644 --- a/drivers/net/phy/Makefile +++ b/drivers/net/phy/Makefile @@ -29,6 +29,7 @@ obj-y += $(sfp-obj-y) $(sfp-obj-m) obj-$(CONFIG_ADIN_PHY) += adin.o obj-$(CONFIG_ADIN1100_PHY) += adin1100.o +obj-$(CONFIG_ADIN1140_PHY) += adin1140-phy.o obj-$(CONFIG_AIR_EN8811H_PHY) += air_en8811h.o obj-$(CONFIG_AMD_PHY) += amd.o obj-$(CONFIG_AMCC_QT2025_PHY) += qt2025.o diff --git a/drivers/net/phy/adin1140-phy.c b/drivers/net/phy/adin1140-phy.c new file mode 100644 index 000000000000..d35da4ad680d --- /dev/null +++ b/drivers/net/phy/adin1140-phy.c @@ -0,0 +1,72 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Driver for Analog Devices, Inc. ADIN1140 10BASE-T1S PHY + * + * Copyright 2026 Analog Devices Inc. + */ + +#include +#include +#include + +#define ADIN1140_PHY_ID 0x0283be00 + +#define ADIN1140_PCS_CTRL 0x08f3 +#define ADIN1140_PCS_CTRL_LOOPBACK BIT(14) + +static int adin1140_config_aneg(struct phy_device *phydev) +{ + /* phylib tries to clear BIT(12) in MDIO_CTRL1, since AN is disabled. + * However, on the ADIN1140, that field is non-standard, being used + * to control the reset status of the PHY (thus it needs to remain set). + */ + return 0; +} + +static int adin1140_loopback(struct phy_device *phydev, bool enable, int speed) +{ + if (enable && speed) + return -EOPNOTSUPP; + + return phy_modify_mmd(phydev, MDIO_MMD_PCS, ADIN1140_PCS_CTRL, + ADIN1140_PCS_CTRL_LOOPBACK, + enable ? ADIN1140_PCS_CTRL_LOOPBACK : 0); +} + +static int adin1140_read_status(struct phy_device *phydev) +{ + phydev->link = 1; + phydev->duplex = DUPLEX_HALF; + phydev->speed = SPEED_10; + phydev->autoneg = AUTONEG_DISABLE; + + return 0; +} + +static struct phy_driver adin1140_driver[] = { + { + PHY_ID_MATCH_EXACT(ADIN1140_PHY_ID), + .name = "ADIN1140_PHY", + .features = PHY_BASIC_T1S_P2MP_FEATURES, + .read_status = adin1140_read_status, + .config_aneg = adin1140_config_aneg, + .set_loopback = adin1140_loopback, + .read_mmd = genphy_read_mmd_c45, + .write_mmd = genphy_write_mmd_c45, + .get_plca_cfg = genphy_c45_plca_get_cfg, + .set_plca_cfg = genphy_c45_plca_set_cfg, + .get_plca_status = genphy_c45_plca_get_status, + }, +}; +module_phy_driver(adin1140_driver); + +static const struct mdio_device_id __maybe_unused adin1140_tbl[] = { + { PHY_ID_MATCH_EXACT(ADIN1140_PHY_ID) }, + { } +}; + +MODULE_DEVICE_TABLE(mdio, adin1140_tbl); + +MODULE_DESCRIPTION("Analog Devices, Inc. ADIN1140 10BASE-T1S PHY"); +MODULE_AUTHOR("Ciprian Regus "); +MODULE_LICENSE("GPL"); -- 2.43.0