Support for onsemi's S2500 10Base-T1S MAC-PHY [LWN.net]

From:		Selvamani Rajagopal via B4 Relay <devnull+Selvamani.Rajagopal.onsemi.com-AT-kernel.org>
To:		Andrew Lunn <andrew-AT-lunn.ch>, Piergiorgio Beruto <pier.beruto-AT-onsemi.com>, Heiner Kallweit <hkallweit1-AT-gmail.com>, Russell King <linux-AT-armlinux.org.uk>, "David S. Miller" <davem-AT-davemloft.net>, Eric Dumazet <edumazet-AT-google.com>, Jakub Kicinski <kuba-AT-kernel.org>, Paolo Abeni <pabeni-AT-redhat.com>, Andrew Lunn <andrew+netdev-AT-lunn.ch>, Parthiban Veerasooran <parthiban.veerasooran-AT-microchip.com>, Selva Rajagopal <selvamani.rajagopal-AT-onsemi.com>, Richard Cochran <richardcochran-AT-gmail.com>, Rob Herring <robh-AT-kernel.org>, Krzysztof Kozlowski <krzk+dt-AT-kernel.org>, Conor Dooley <conor+dt-AT-kernel.org>, Simon Horman <horms-AT-kernel.org>, Jonathan Corbet <corbet-AT-lwn.net>, Shuah Khan <skhan-AT-linuxfoundation.org>
Subject:		[PATCH net-next v4 00/16] Support for onsemi's S2500 10Base-T1S MAC-PHY
Date:		Fri, 05 Jun 2026 22:42:31 -0700
Message-ID:		<20260605-s2500-mac-phy-support-v4-0-de0fbc13c6d8@onsemi.com>
Cc:		netdev-AT-vger.kernel.org, linux-kernel-AT-vger.kernel.org, devicetree-AT-vger.kernel.org, linux-doc-AT-vger.kernel.org, Jerry Ray <jerry.ray-AT-microchip.com>, Selvamani Rajagopal <Selvamani.Rajagopal-AT-onsemi.com>
Archive-link:		Article

This patch series brings support for onsemi's S2500 that is IEEE 802.3cg
compliant Ethernet transceiver with an integrated Media Access
Controller (MAC-PHY)

Previous versions were submitted unthreaded, without coverletter
and changelog.

Changes in v4:
 - Added return value comment for genphy_read/write_phy_mmd functions
 - Added genphy_loopback_fixed_speed helper function to be used in
   set_loopback callbacks
 - Updated networking documentation for OA TC6 framework to elaborate
   on what is expected in the ptp_clock_info structure for registration.
 - added spi-max-frequency in YAML file based on alert from sashiko-bot
 - Removed model/version from the onsemi driver's private structure as
   they were useful as "information-only" data.
 - Replaced the non-standard selftest with Linux's standard selftest
   and made it as a separate patch
 - Changed bit manipulation, shift operations to use macros so that
   it is clean and readable.
 - added new read_register and write_register apis with _mms postfix
   so that MMS (memory map selector) can be given as a parameter.
 - Fixed the wrong condition check with NETIF_F_RXFCS to subtract
   FCS size from the length of the frame.

Signed-off-by: Selvamani Rajagopal <Selvamani.Rajagopal@onsemi.com>
---
Selvamani Rajagopal (16):
      net: phy: Helper to read and write through C45 without lock
      net: phy: Helper to modify PHY loopback mode only.
      net: ethernet: oa_tc6: Move oa_tc6.c to its own directory
      net: phy: microchip_t1s: Use generic APIs for C45 read and write
      net: ethernet: oa_tc6: Move constant definitions to header file
      net: ethernet: oa_tc6: Support for hardware timestamp
      net: ethernet: oa_tc6: Support for vendor specific MMS
      net: ethernet: oa_tc6: Remove FCS size in RX frame
      net: ethernet: oa_tc6: read, write interface with MMS option
      net: phy: ncn26000: Support for onsemi's S2500 internal phy
      net: phy: ncn26000: Enable enhanced noise immunity
      net: phy: ncn26000: Support for loopback support
      onsemi: s2500: Add driver support for TS2500 MAC-PHY
      onsemi: s2500: Added selftest support to onsemi's S2500 driver
      dt-bindings: net: add onsemi's S2500
      Documentation: networking: Add timestamp related APIs to OA TC6 framework

 .../devicetree/bindings/net/onnn,s2500.yaml        |  67 +++
 Documentation/networking/oa-tc6-framework.rst      |  76 +++
 MAINTAINERS                                        |  13 +-
 drivers/net/ethernet/Kconfig                       |  12 +-
 drivers/net/ethernet/Makefile                      |   2 +-
 drivers/net/ethernet/microchip/lan865x/lan865x.c   |  61 +-
 drivers/net/ethernet/oa_tc6/Kconfig                |  16 +
 drivers/net/ethernet/oa_tc6/Makefile               |   7 +
 drivers/net/ethernet/{ => oa_tc6}/oa_tc6.c         | 476 ++++++++++------
 drivers/net/ethernet/oa_tc6/oa_tc6_ptp.c           |  67 +++
 drivers/net/ethernet/oa_tc6/oa_tc6_std_def.h       | 190 +++++++
 drivers/net/ethernet/oa_tc6/oa_tc6_tstamp.c        | 202 +++++++
 drivers/net/ethernet/onsemi/Kconfig                |  21 +
 drivers/net/ethernet/onsemi/Makefile               |   7 +
 drivers/net/ethernet/onsemi/s2500/Kconfig          |  22 +
 drivers/net/ethernet/onsemi/s2500/Makefile         |   7 +
 drivers/net/ethernet/onsemi/s2500/s2500_ethtool.c  | 354 ++++++++++++
 drivers/net/ethernet/onsemi/s2500/s2500_hw_def.h   | 225 ++++++++
 drivers/net/ethernet/onsemi/s2500/s2500_main.c     | 632 +++++++++++++++++++++
 drivers/net/ethernet/onsemi/s2500/s2500_ptp.c      | 233 ++++++++
 drivers/net/phy/dp83867.c                          |  11 +-
 drivers/net/phy/microchip_t1s.c                    |  32 +-
 drivers/net/phy/ncn26000.c                         |  63 +-
 drivers/net/phy/phy_device.c                       |  75 +++
 include/linux/oa_tc6.h                             |  36 ++
 include/linux/phy.h                                |   6 +
 26 files changed, 2662 insertions(+), 251 deletions(-)
---
base-commit: 903db046d5579bef0ea699eae4b279dd6455fc9f
change-id: 20260601-s2500-mac-phy-support-4f3ae920fb73

Best regards,
-- 
Selvamani Rajagopal <Selvamani.Rajagopal@onsemi.com>