[PATCH net-next v2 0/3] ptp: ocp: support the WiWi production Time Card

[Ahmad Byagowi <ahmadexp@gmail.com>]

The WiWi Time Card (2163:1008, subsystem 10ee:0007) uses a
Celestica-compatible register map behind LitePCIe. Its bridge does not
support the subword MMIO used by the XIIC driver. Add an opt-in word
access mode, exercise both modes with KUnit, and enable ptp_ocp on the
revision 02 interface. Other cards retain their existing access modes.
The series does not enable WiWi flash updates or change LED policy.

Patch 3 uses the platform-data field from patch 1. Could the I2C
maintainers review patches 1 and 2 for an Ack to take the series
through net-next?

Changes since v1:
 - 1/3: Drop five explicit inline annotations in the C file and
   shorten the platform-data comment. No access semantics change.
 - 2/3: Wrap the offsets and expectations flagged by checkpatch.
   The four test modes, register offsets and expected values are unchanged.
 - 3/3: Follow NetTimeLogic's PCI revision convention. Replace the exact
   image ID and per-core version checks with a revision 02 gate. Reject
   unknown revisions before FPGA MMIO and retain the BAR/MSI-X checks.
   Report the full build ID in devlink; select capabilities by interface
   revision. Update the documentation and wrap overlength lines.

The revision 02 driver was tested on a physical card running build
0x0000800f under Secure Boot. It bound with 64 MSI-X vectors; the PHC
advanced 3.000441080 s over three one-second sleeps. SPI NOR and both
EEPROM clients bound. The PHC was UNSYNCED at probe; this test does not
establish PPS lock or valid UTC. Only that firmware build was tested on
hardware. Subsequent edits to the tested drivers remove inline hints or
change formatting and comments.

On the rebased v2, the XIIC and ptp_ocp objects built on x86-64 with
W=1 under allmodconfig and allyesconfig. Four XIIC KUnit cases passed
in an isolated x86-64 QEMU boot. Fixtures exercised all 256 PCI
revisions, bad PCI layouts and multiple image IDs. These are not
additional hardware tests. No full allmodconfig or allyesconfig build
is claimed for v2.

Codex assisted with the changes, tests and changelogs using the board
layout, machine-check evidence, vendor revision rule and v1 CI reports.

v1: https://lore.kernel.org/netdev/20261111041904.48916-1-ahmadexp@gmail.com/

Ahmad Byagowi (3):
  i2c: xiic: allow platforms to require 32-bit register accesses
  i2c: xiic: add KUnit coverage for register access modes
  ptp: ocp: support the WiWi revision 02 Time Card

 Documentation/networking/devlink/ptp_ocp.rst |  36 +++-
 MAINTAINERS                                  |   1 +
 drivers/i2c/busses/Kconfig                   |  14 ++
 drivers/i2c/busses/i2c-xiic.c                |  60 +++++--
 drivers/i2c/busses/tests/i2c_xiic_kunit.c    |  91 +++++++++++
 drivers/ptp/ptp_ocp.c                        | 163 ++++++++++++++++++-
 include/linux/platform_data/i2c-xiic.h       |   3 +
 7 files changed, 341 insertions(+), 27 deletions(-)
 create mode 100644 drivers/i2c/busses/tests/i2c_xiic_kunit.c


base-commit: 368fbf5d82da9ebce309449c74fc0b128f7d0219