[PATCH net-next 0/2] net: phy: microchip_t1s: Add support for LAN867x Rev.D0 PHY

[Parthiban Veerasooran]

This patch series adds Open Alliance TC14 (OATC14) 10BASE-T1S cable
diagnostic feature support to the Linux kernel PHY subsystem and enable
this feature for Microchip LAN867x Rev.D0 PHYs. These patches provide
standardized cable test functionality for 10BASE-T1S Ethernet PHYs,
allowing users to perform cable diagnostics via ethtool.

Patch Summary:
1. add OATC14 10BASE-T1S PHY cable diagnostic support
	- Implements support for the OATC14 cable diagnostic feature in
	  Clause 45 PHYs.
	- Adds functions to start a cable test and retrieve its status,
	  mapping hardware results to ethtool codes.
	- Exports these functions for use by PHY drivers.
	- Open Alliance TC14 10BASE-T1S Advanced Diagnostic PHY Features.
	  https://opensig.org/wp-content/uploads/2025/06/OPEN_Alliance_10BASE-T1S_Advanced_PHY_features_for-automotive_Ethernet_V2.1b.pdf
	
2. add cable diagnostic support for LAN867x Rev.D0
	- Integrates the generic OATC14 cable test functions into the
	  Microchip LAN867x Rev.D0 PHY driver.
	- Enables ethtool cable diagnostics for this PHY, improving
	  troubleshooting and maintenance.

Parthiban Veerasooran (2):
  net: phy: phy-c45: add OATC14 10BASE-T1S PHY cable diagnostic support
  net: phy: microchip_t1s:: add cable diagnostic support for LAN867x
    Rev.D0

 drivers/net/phy/mdio-open-alliance.h |  36 ++++++++
 drivers/net/phy/microchip_t1s.c      |   3 +
 drivers/net/phy/phy-c45.c            | 122 +++++++++++++++++++++++++++
 include/linux/phy.h                  |   3 +
 4 files changed, 164 insertions(+)


base-commit: 9e8a443401dfb15574f9cc962783500ca8c2eec2
-- 
2.34.1