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authorRafael J. Wysocki <rjw@sisk.pl>2010-01-23 16:25:15 -0500
committerRafael J. Wysocki <rjw@sisk.pl>2010-02-26 14:39:10 -0500
commit0e06b4a891c6a108412fe24b4500f499da2cf8a1 (patch)
treeed254631bdc24e676b95b633d310b284a2df9c45 /Documentation/ABI/testing
parent5af84b82701a96be4b033aaa51d86c72e2ded061 (diff)
PM: Add a switch for disabling/enabling asynchronous suspend/resume
Add sysfs attribute /sys/power/pm_async allowing the user space to disable/enable asynchronous suspend/resume of devices. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Diffstat (limited to 'Documentation/ABI/testing')
-rw-r--r--Documentation/ABI/testing/sysfs-power13
1 files changed, 13 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-power b/Documentation/ABI/testing/sysfs-power
index dcff4d0623ad..d6a801f45b48 100644
--- a/Documentation/ABI/testing/sysfs-power
+++ b/Documentation/ABI/testing/sysfs-power
@@ -101,3 +101,16 @@ Description:
101 101
102 CAUTION: Using it will cause your machine's real-time (CMOS) 102 CAUTION: Using it will cause your machine's real-time (CMOS)
103 clock to be set to a random invalid time after a resume. 103 clock to be set to a random invalid time after a resume.
104
105What: /sys/power/pm_async
106Date: January 2009
107Contact: Rafael J. Wysocki <rjw@sisk.pl>
108Description:
109 The /sys/power/pm_async file controls the switch allowing the
110 user space to enable or disable asynchronous suspend and resume
111 of devices. If enabled, this feature will cause some device
112 drivers' suspend and resume callbacks to be executed in parallel
113 with each other and with the main suspend thread. It is enabled
114 if this file contains "1", which is the default. It may be
115 disabled by writing "0" to this file, in which case all devices
116 will be suspended and resumed synchronously.