Ticket #81 (closed defect: fixed)

Opened 12 years ago

Last modified 18 months ago

Decide how PMU RTC alarm interrupt is signalled to userspace

Reported by: laforge@… Owned by: werner
Priority: high Milestone:
Component: kernel Version: current svn head
Severity: major Keywords:
Cc: buglog@… Blocked By:
Blocking: Estimated Completion (week):
HasPatchForReview: no PatchReviewResult:


Change History

comment:1 Changed 12 years ago by laforge@…

  • blocked set to 112

comment:2 Changed 12 years ago by laforge@…

  • blocked set to 114

comment:3 Changed 12 years ago by laforge@…

  • blocked set to 96

comment:4 Changed 12 years ago by laforge@…

This is done via a "boot_reason" argument, which will be implemented in u-boot soon.

comment:5 Changed 12 years ago by laforge@…

  • blocked set to 80

comment:6 Changed 12 years ago by laforge@…

  • Owner changed from laforge@… to werner@…

There already is an environment variable that gets initialized with the first
read of OOCS (or was it INT1) register of the PMU.

We somehow need to pass this variable either as boot parameter to the kernel (if
the alarm is actually waking us up from power off mode).

If we're resuming from power off, then the PMU wakeup reason should not be read,
and the kernel PCF50606 driver should receive the ALARM interrupt.

This needs to be implemented and verified.

comment:7 Changed 11 years ago by alphaone@…

What's the progress on this?

comment:8 Changed 10 years ago by roh

  • Owner changed from werner@… to werner

comment:9 Changed 10 years ago by andy

  • Status changed from new to closed
  • HasPatchForReview unset
  • Resolution set to fixed

On wake you can figure out the wake source generally from here:

# cat /sys/bus/platform/devices/neo1973-resume.0/resume_reason



and in the event of it being the PMU interrupt, which is the case for RTC alarm, you can get more info from here:

# cat /sys/class/i2c-adapter/i2c-0/0-0073/resume_reason

That bit shown above should be set on RTC alarm wake.

comment:10 Changed 18 months ago by Kennescoma

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