[PATCH v3 0/4] Apple/PASemi i2c error recovery fixes

[Sven Peter via B4 Relay]

Hi,

This series adds a few fixes/improvements to the error recovery for
Apple/PASemi i2c controllers.
The patches have been in our downstream tree and were originally used
to debug a rare glitch caused by clock strechting but are useful in
general. We haven't seen the controller misbehave since adding these.

Best,

Sven

Signed-off-by: Sven Peter <sven at svenpeter.dev>
---
Changes in v3:
- dev_err instead of dev_warn for errors
- Added PASEMI_ prefix to the timeout define
- Declared new variables in the innermost scope they're used
- Re-added a dev_err that was dropped by mistake
- Removed already applied commits
- Removed open-coded readx_poll_timeout in the non-irq path
- Reorder commits
- Link to v2: https://lore.kernel.org/r/20250415-pasemi-fixes-v2-0-c543bf53151a@svenpeter.dev

Changes in v2:
- Added commit to use the correct include (bits.h instead of bitfield.h)
- Added commit to sort includes
- Moved timeout explanations to code instead of just the commit log
- Made timeout recovery also work correctly in the interrupt case when
  waiting for the condition failed
- Used readx_poll_timeout instead of open-coded alternative
- Link to v1: https://lore.kernel.org/r/20250222-pasemi-fixes-v1-0-d7ea33d50c5e@svenpeter.dev

---
Hector Martin (3):
      i2c: pasemi: Enable the unjam machine
      i2c: pasemi: Improve error recovery
      i2c: pasemi: Log bus reset causes

Sven Peter (1):
      i2c: pasemi: Improve timeout handling

 drivers/i2c/busses/i2c-pasemi-core.c | 107 ++++++++++++++++++++++++++++-------
 1 file changed, 88 insertions(+), 19 deletions(-)
---
base-commit: 7cfa6946c58989507a52f38a1267faa74a65ab0e
change-id: 20250220-pasemi-fixes-916cb77404ba

Best regards,
-- 
Sven Peter <sven at svenpeter.dev>