Ticket #80 (closed defect: fixed)

Opened 12 years ago

Last modified 2 years ago

wakeup reason not in /proc/cmdline

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


this helps us to understand whether we powered up due to charger plug in, RTC
alarm or actual power button press.

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@…

  • Milestone set to Phase 0

comment:5 Changed 12 years ago by laforge@…

  • Status changed from new to assigned

The solution has now slightly changed. u-boot will just pass a kernel boot
argument "boot_reason=...".

comment:6 Changed 12 years ago by laforge@…

  • Status changed from assigned to closed
  • Resolution set to wontfix
  • dependson set to 81

since this is now 100% implemented in u-boot, there's no need for any kernel
code changes

comment:7 Changed 11 years ago by mickey@…

  • Status changed from closed to reopened
  • Resolution wontfix deleted
  • Summary changed from Add sysfs entry for PMU wakeup reason to wakeup reason not in /proc/cmdline

Reopening and changing description since this does not seem to work.

comment:8 Changed 11 years ago by mickey@…

  • Owner changed from laforge@… to openmoko-kernel@…
  • Status changed from reopened to new

Reassigning to default owner.

comment:9 Changed 11 years ago by mickey@…


comment:10 Changed 11 years ago by andy@…

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

If you have a U-Boot with uboot-add-find-wake-reason.patch (in git for a week
now) and current git stable branch kernel,

$ cat /sys/devices/platform/neo1973-resume.0/resume_reason

gets you a resume reason list like this:


  • EINT09_PMU


  • batfull chghalt thlimon thlimoff usblimon usblimoff adcrdy onkey1s lowsys lowbat hightmp autopwrfail dwn1pwrfail dwn2pwrfail ledpwrfail ledovp ldo1pwrfail ldo2pwrfail ldo3pwrfail ldo4pwrfail ldo5pwrfail ldo6pwrfail hcidopwrfail hcidoovl EINT10_NULL EINT11_NULL EINT12_GLAMO EINT13_NULL EINT14_NULL EINT15_NULL

This is suitable for userspace to parse with grep; if drivers are interested in
wake reason, the EINT_* stuff is available as a bitfield in kernelspace and the
PMU-specific reason is as available as a bitfield as soon as I2C and PMU resumes
and services its interrupt.

comment:11 Changed 11 years ago by anonymous

  • Milestone Phase 0 deleted

Milestone Phase 0 deleted

comment:12 Changed 11 years ago by mickey

  • Status changed from closed to reopened
  • Resolution fixed deleted

The subreason for * EINT09_PMU is no longer starred. Tried with waking up by button press as well as waking up by RTC. Tested kernel was http://downloads.openmoko.org/framework/milestone3/uImage-2.6.24+r5+gitr1+ca19d156400f817960efe0d14680324b2ea34171-r5-om-gta02.bin, U-Boot is fairly recent.

comment:13 Changed 10 years ago by andy

  • HasPatchForReview unset

We split the CPU-side wakeup reason and the PMU internal wakeup reason a while back... is this currently working OK or it still has a problem?

comment:14 Changed 10 years ago by andy

  • Status changed from reopened to closed
  • Resolution set to fixed

I confirmed it's working fine

cat /sys/bus/platform/devices/neo1973-resume.0/resume_reason
cat /sys/class/i2c-adapter/i2c-0/0-0073/resume_reason

comment:15 Changed 2 years ago by RoberMync

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