xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

PM / sleep: Report interrupt that caused system wakeup

Browse Source 
Add a sysfs attribute, /sys/power/pm_wakeup_irq, reporting the IRQ
number of the first wakeup interrupt (that is, the first interrupt
from an IRQ line armed for system wakeup) seen by the kernel during
the most recent system suspend/resume cycle.

This feature will be useful for system wakeup diagnostics of
spurious wakeup interrupts.

Signed-off-by: Alexandra Yates <alexandra.yates@linux.intel.com>
[ rjw: Fixed up pm_wakeup_irq definition ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Alexandra Yates
2015-09-15 10:32:46 -07:00
committed by Rafael J. Wysocki
parent 6ff33f3902
commit a6f5f0dd4e
5 changed files with 45 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
Documentation/ABI/testing/sysfs-power
View File

@@ -256,3 +256,15 @@ Description:
Writing a "1" enables this printing while writing a "0"
disables it. The default value is "0". Reading from this file
will display the current value.
What: /sys/power/pm_wakeup_irq
Date: April 2015
Contact: Alexandra Yates <alexandra.yates@linux.intel.org>
Description:
The /sys/power/pm_wakeup_irq file reports to user space the IRQ
number of the first wakeup interrupt (that is, the first
interrupt from an IRQ line armed for system wakeup) seen by the
kernel during the most recent system suspend/resume cycle.
This output is useful for system wakeup diagnostics of spurious
wakeup interrupts.