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

Driver implementation is compatible and works with OA TC6
framework that is already present. S2500 driver supports
hardware timestamping.

Driver has support for running selftest and loopback tests.
Through ethtool, it can provide traffic stats, rmon stats,
and timestamping related traffic stats.

As S2500 has an internal PHY, changes have been added
to onsemi's PHY driver to support this device.

Signed-off-by: Selvamani Rajagopal <redacted>
---
Changes in v6:
- Changes to ensure onsemi code stay within 80 columns.
- Fixed the error of "not described in comments section"
  in comments section.

- Fixed compiler warnings.
- Link to v5: https://patch.msgid.link/20260614-s2500-mac-phy-support-v5-0-89874b72f725@onsemi.com

Changes in v5:
 - kernel doc related changes in oa_tc.c, onsemi driver files and
  oa tc6 rst file
- Link to v4: https://lore.kernel.org/r/20260605-s2500-mac-phy-support-v4-0-de0fbc13c6d8@onsemi.com (local)

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.
 - Link to v3: https://lore.kernel.org/r/CY8PR02MB92499C9080614FA3CEB8CD0483162@CY8PR02MB9249.namprd02.prod.outlook.com (local)

Changes in v3:
 - Moved OA TC6 framework to its own directory.
 - Split changes to smaller patches based on feedback.
 - Added PHY loopback support as a separate patch.
 - New, read and write register APIs with extra parameter MMS
 - Link to v2: https://lore.kernel.org/r/CY8PR02MB924920C8825C7AE5D22EFA4483382@CY8PR02MB9249.namprd02.prod.outlook.com (local)

Changes in v2:
 - API to add vendor specific MMS to mdio device map.
 - Link to v1: https://lore.kernel.org/r/CY8PR02MB9249D083B637477C254F9B0583322@CY8PR02MB9249.namprd02.prod.outlook.com (local)

---
Selvamani Rajagopal (15):
      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: 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
      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      |  80 +++
 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         | 468 +++++++++------
 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        | 201 +++++++
 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  | 360 +++++++++++
 drivers/net/ethernet/onsemi/s2500/s2500_hw_def.h   | 225 +++++++
 drivers/net/ethernet/onsemi/s2500/s2500_main.c     | 655 +++++++++++++++++++++
 drivers/net/ethernet/onsemi/s2500/s2500_ptp.c      | 250 ++++++++
 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, 2704 insertions(+), 250 deletions(-)
---
base-commit: 805185b7c7a1069e407b6f7b3bc98e44d415f484
change-id: 20260601-s2500-mac-phy-support-4f3ae920fb73

Best regards,
-- 
Selvamani Rajagopal [off-list ref]