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authorAlexandra Yates <alexandra.yates@linux.intel.com>2015-09-15 10:32:46 -0700
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2015-09-16 14:20:41 +0200
commita6f5f0dd4e21191ce35030dd4d6421e1cca10ee4 (patch)
treed11055309f1b697fe91aadaf327dace3412b31f1 /Documentation/ABI
parent6ff33f3902c3b1c5d0db6b1e2c70b6d76fba357f (diff)
PM / sleep: Report interrupt that caused system wakeup
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>
Diffstat (limited to 'Documentation/ABI')
-rw-r--r--Documentation/ABI/testing/sysfs-power12
1 files changed, 12 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-power b/Documentation/ABI/testing/sysfs-power
index f4551816329e..50b368d490b5 100644
--- a/Documentation/ABI/testing/sysfs-power
+++ b/Documentation/ABI/testing/sysfs-power
@@ -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.