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-rw-r--r--Documentation/ABI/testing/sysfs-power12
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diff --git a/Documentation/ABI/testing/sysfs-power b/Documentation/ABI/testing/sysfs-power
index f523e5a3ac33..713cab1d5f12 100644
--- a/Documentation/ABI/testing/sysfs-power
+++ b/Documentation/ABI/testing/sysfs-power
@@ -273,3 +273,15 @@ Description:
This output is useful for system wakeup diagnostics of spurious
wakeup interrupts.
+
+What: /sys/power/pm_debug_messages
+Date: July 2017
+Contact: Rafael J. Wysocki <rjw@rjwysocki.net>
+Description:
+ The /sys/power/pm_debug_messages file controls the printing
+ of debug messages from the system suspend/hiberbation
+ infrastructure to the kernel log.
+
+ Writing a "1" to this file enables the debug messages and
+ writing a "0" (default) to it disables them. Reads from
+ this file return the current value.