linux-kernel - [PATCH net-next 0/2] Add SQI and SQI+ support for OATC14 10Base-T1S PHYs and Microchip T1S driver

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Message-ID: <20251113115206.140339-1-parthiban.veerasooran@microchip.com>
Date: Thu, 13 Nov 2025 17:22:04 +0530
From: Parthiban Veerasooran <parthiban.veerasooran@...rochip.com>
To: <Parthiban.Veerasooran@...rochip.com>, <piergiorgio.beruto@...il.com>,
	<andrew@...n.ch>, <hkallweit1@...il.com>, <linux@...linux.org.uk>,
	<davem@...emloft.net>, <edumazet@...gle.com>, <kuba@...nel.org>,
	<pabeni@...hat.com>
CC: <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>, "Parthiban
 Veerasooran" <parthiban.veerasooran@...rochip.com>
Subject: [PATCH net-next 0/2] Add SQI and SQI+ support for OATC14 10Base-T1S PHYs and Microchip T1S driver

This patch series adds Signal Quality Indicator (SQI) and enhanced SQI+
support for OATC14 10Base-T1S PHYs, along with integration into the
Microchip T1S PHY driver. These changes enable higher-layer drivers and
diagnostic tools to assess link quality more accurately.

Patch Summary:
1. add SQI and SQI+ support for OATC14 10Base-T1S PHYs
   - Introduces MDIO register definitions for DCQ_SQI and DCQ_SQIPLUS.
   - Adds genphy_c45_oatc14_get_sqi_max() to report the maximum SQI/SQI+
     level.
   - Adds genphy_c45_oatc14_get_sqi() to return the current SQI or SQI+
     value.
   - Updates include/linux/phy.h to expose the new APIs.
   - SQI+ capability is read from the Advanced Diagnostic Features
     Capability register (ADFCAP). If unsupported, the driver falls back
     to basic SQI (0–7 levels).
   - 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 SQI support for LAN867x Rev.D0 PHYs
   - Registers .get_sqi and .get_sqi_max callbacks in the Microchip T1S
     driver.
   - Enables network drivers and diagnostic tools to query link signal
     quality for LAN867x Rev.D0 PHYs.
   - Existing PHY functionality remains unchanged.

Parthiban Veerasooran (2):
  net: phy: phy-c45: add SQI and SQI+ support for OATC14 10Base-T1S PHYs
  net: phy: microchip_t1s: add SQI support for LAN867x Rev.D0 PHYs

 drivers/net/phy/mdio-open-alliance.h | 14 +++++
 drivers/net/phy/microchip_t1s.c      |  2 +
 drivers/net/phy/phy-c45.c            | 94 ++++++++++++++++++++++++++++
 include/linux/phy.h                  |  2 +
 4 files changed, 112 insertions(+)


base-commit: 68fa5b092efab37a4f08a47b22bb8ca98f7f6223
-- 
2.34.1