Commit 830877d8 authored May 17, 2025 by Christian Marangi Committed by Jakub Kicinski May 21, 2025

net: phy: Add support for Aeonsemi AS21xxx PHYs



Add support for Aeonsemi AS21xxx 10G C45 PHYs. These PHYs integrate
an IPC to setup some configuration and require special handling to
sync with the parity bit. The parity bit is a way the IPC use to
follow correct order of command sent.

Supported PHYs AS21011JB1, AS21011PB1, AS21010JB1, AS21010PB1,
AS21511JB1, AS21511PB1, AS21510JB1, AS21510PB1, AS21210JB1,
AS21210PB1 that all register with the PHY ID 0x7500 0x7510
before the firmware is loaded.

They all support up to 5 LEDs with various HW mode supported.

While implementing it was found some strange coincidence with using the
same logic for implementing C22 in MMD regs in Broadcom PHYs.

For reference here the AS21xxx PHY name logic:

AS21x1xxB1
    ^ ^^
    | |J: Supports SyncE/PTP
    | |P: No SyncE/PTP support
    | 1: Supports 2nd Serdes
    | 2: Not 2nd Serdes support
    0: 10G, 5G, 2.5G
    5: 5G, 2.5G
    2: 2.5G

Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
Link: https://patch.msgid.link/20250517201353.5137-6-ansuelsmth@gmail.com


Signed-off-by: Jakub Kicinski <kuba@kernel.org>

parent d6c45707

MAINTAINERS

+6 −0

Original line number	Diff line number	Diff line
		@@ -646,6 +646,12 @@ F: drivers/iio/accel/adxl380.h
		F: drivers/iio/accel/adxl380_i2c.c
		F: drivers/iio/accel/adxl380_spi.c

		AEONSEMI PHY DRIVER
		M: Christian Marangi <ansuelsmth@gmail.com>
		L: netdev@vger.kernel.org
		S: Maintained
		F: drivers/net/phy/as21xxx.c

		AF8133J THREE-AXIS MAGNETOMETER DRIVER
		M: Ondřej Jirman <megi@xff.cz>
		S: Maintained

drivers/net/phy/Kconfig

+12 −0

Original line number	Diff line number	Diff line
		@@ -76,6 +76,18 @@ config SFP

		comment "MII PHY device drivers"

		config AS21XXX_PHY
		tristate "Aeonsemi AS21xxx PHYs"
		help
		Currently supports the Aeonsemi AS21xxx PHY.

		These are C45 PHYs 10G that require all a generic firmware.

		Supported PHYs AS21011JB1, AS21011PB1, AS21010JB1, AS21010PB1,
		AS21511JB1, AS21511PB1, AS21510JB1, AS21510PB1, AS21210JB1,
		AS21210PB1 that all register with the PHY ID 0x7500 0x7500
		before the firmware is loaded.

		config AIR_EN8811H_PHY
		tristate "Airoha EN8811H 2.5 Gigabit PHY"
		help

drivers/net/phy/Makefile

+1 −0

Original line number	Diff line number	Diff line
		@@ -32,6 +32,7 @@ obj-$(CONFIG_AIR_EN8811H_PHY) += air_en8811h.o
		obj-$(CONFIG_AMD_PHY) += amd.o
		obj-$(CONFIG_AMCC_QT2025_PHY) += qt2025.o
		obj-$(CONFIG_AQUANTIA_PHY) += aquantia/
		obj-$(CONFIG_AS21XXX_PHY) += as21xxx.o
		ifdef CONFIG_AX88796B_RUST_PHY
		obj-$(CONFIG_AX88796B_PHY) += ax88796b_rust.o
		else

drivers/net/phy/as21xxx.c

0 → 100644

+1087 −0

File added.

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