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Merge branch 'ptp-ocp-add-tap-cpld-support-for-adva-timecard-x1'

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Sagi Maimon says:

====================
ptp: ocp: add TAP CPLD support for ADVA TimeCard X1

The ADVA TimeCard X1 (PCI device 0x0410) carries a Lattice MachXO3 CPLD
on the TMC I2C bus.  This series adds access to it and an update path
through devlink flash.

The card has two I2C controllers.  Linux registers only the one at
0x00150000, normally routed to the config EEPROMs; the one at 0x00120000
belongs to the on-card MicroBlaze and is routed to the TMC or M.2 bus as
its firmware selects.  A request/grant handshake re-routes the host
controller onto the TMC bus, where the PCA9548 and the CPLD behind its
channel 0 live.  Everything here is built on that handshake.

Patches 1 and 2 are pre-existing probe-error-path bugs that were buried
in the feature commit in v13; they are split out with Fixes: tags.  Patch
1 is also a prerequisite: patch 3 adds a mutex that ptp_ocp_detach()
destroys, so devlink has to be unregistered first.  Patch 3 adds the bus
arbitration and the read-only interfaces, patch 4 the flashing.
====================

Link: https://patch.msgid.link/20260916153242.157171-1-sagi.maimon@adtran.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Jakub Kicinski 2026-09-21 16:13:34 -07:00
commit 05092b5433
5 changed files with 1039 additions and 6 deletions
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