[PATCH v2 0/3] rtc: ds1685: power-off fixes

[Imre Kaloz]

Three fixes for ds1685_rtc_poweroff(), on SGI O2 and Octane machines.

Patch 1 arms the wake-up alarm only if an alarm is set, so that stale
alarm registers no longer power the machine back on.

Patch 2 replaces the sleep before the PAB write with a busy wait, as
power-off handlers must not sleep.

Patch 3 repeats the PAB write, clearing the kickstart and wake-up
flags with it, until power is removed.

Patch 1 was tested on an O2, and the whole series on an Octane.

Changes in v2:
- New patch 2: use mdelay() instead of msleep() before the PAB write.
- Patch 3 (v1 patch 2): use mdelay() instead of msleep() in the
  repeat loop.

v1: https://lore.kernel.org/all/20261013094930.574-1-kaloz@xxxxxxxxxx/

Imre Kaloz (3):
  rtc: ds1685: arm the wake-up alarm at power-off only if an alarm is
    set
  rtc: ds1685: do not sleep in the power-off handler
  rtc: ds1685: keep setting PAB until power is removed

 drivers/rtc/rtc-ds1685.c | 40 ++++++++++++++++++++++++++--------------
 1 file changed, 26 insertions(+), 14 deletions(-)


base-commit: 24a19b953e2a3d0ea5a8c4951a0ab8f32720c907
-- 
2.47.3