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PM / wakeup: Correct presence vs. emptiness of wakeup_* attributes

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According to the documentation, the various wakeup_* attributes in sysfs
are not present if the device is not enabled to wake up the system.

This is not correct: the attributes are not present if the device is not
capable to wake up the system. They are empty if the device is not enabled
to wake up the system.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Geert Uytterhoeven 2014-03-28 11:15:14 +01:00 committed by Rafael J. Wysocki
parent 70f6c08757
commit d054980165
1 changed files with 30 additions and 16 deletions
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46
Documentation/ABI/testing/sysfs-devices-power
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@ -83,8 +83,10 @@ Contact: Rafael J. Wysocki <rjw@rjwysocki.net>
Description: Description:
The /sys/devices/.../wakeup_count attribute contains the number The /sys/devices/.../wakeup_count attribute contains the number
of signaled wakeup events associated with the device. This of signaled wakeup events associated with the device. This
attribute is read-only. If the device is not enabled to wake up attribute is read-only. If the device is not capable to wake up
the system from sleep states, this attribute is not present. the system from sleep states, this attribute is not present.
If the device is not enabled to wake up the system from sleep
states, this attribute is empty.
What: /sys/devices/.../power/wakeup_active_count What: /sys/devices/.../power/wakeup_active_count
Date: September 2010 Date: September 2010
@ -93,8 +95,10 @@ Description:
The /sys/devices/.../wakeup_active_count attribute contains the The /sys/devices/.../wakeup_active_count attribute contains the
number of times the processing of wakeup events associated with number of times the processing of wakeup events associated with
the device was completed (at the kernel level). This attribute the device was completed (at the kernel level). This attribute
is read-only. If the device is not enabled to wake up the is read-only. If the device is not capable to wake up the
system from sleep states, this attribute is not present. system from sleep states, this attribute is not present. If
the device is not enabled to wake up the system from sleep
states, this attribute is empty.
What: /sys/devices/.../power/wakeup_abort_count What: /sys/devices/.../power/wakeup_abort_count
Date: February 2012 Date: February 2012
@ -104,8 +108,9 @@ Description:
number of times the processing of a wakeup event associated with number of times the processing of a wakeup event associated with
the device might have aborted system transition into a sleep the device might have aborted system transition into a sleep
state in progress. This attribute is read-only. If the device state in progress. This attribute is read-only. If the device
is not enabled to wake up the system from sleep states, this is not capable to wake up the system from sleep states, this
attribute is not present. attribute is not present. If the device is not enabled to wake
up the system from sleep states, this attribute is empty.
What: /sys/devices/.../power/wakeup_expire_count What: /sys/devices/.../power/wakeup_expire_count
Date: February 2012 Date: February 2012
@ -114,8 +119,10 @@ Description:
The /sys/devices/.../wakeup_expire_count attribute contains the The /sys/devices/.../wakeup_expire_count attribute contains the
number of times a wakeup event associated with the device has number of times a wakeup event associated with the device has
been reported with a timeout that expired. This attribute is been reported with a timeout that expired. This attribute is
read-only. If the device is not enabled to wake up the system read-only. If the device is not capable to wake up the system
from sleep states, this attribute is not present. from sleep states, this attribute is not present. If the
device is not enabled to wake up the system from sleep states,
this attribute is empty.
What: /sys/devices/.../power/wakeup_active What: /sys/devices/.../power/wakeup_active
Date: September 2010 Date: September 2010
@ -124,8 +131,10 @@ Description:
The /sys/devices/.../wakeup_active attribute contains either 1, The /sys/devices/.../wakeup_active attribute contains either 1,
or 0, depending on whether or not a wakeup event associated with or 0, depending on whether or not a wakeup event associated with
the device is being processed (1). This attribute is read-only. the device is being processed (1). This attribute is read-only.
If the device is not enabled to wake up the system from sleep If the device is not capable to wake up the system from sleep
states, this attribute is not present. states, this attribute is not present. If the device is not
enabled to wake up the system from sleep states, this attribute
is empty.
What: /sys/devices/.../power/wakeup_total_time_ms What: /sys/devices/.../power/wakeup_total_time_ms
Date: September 2010 Date: September 2010
@ -134,8 +143,9 @@ Description:
The /sys/devices/.../wakeup_total_time_ms attribute contains The /sys/devices/.../wakeup_total_time_ms attribute contains
the total time of processing wakeup events associated with the the total time of processing wakeup events associated with the
device, in milliseconds. This attribute is read-only. If the device, in milliseconds. This attribute is read-only. If the
device is not enabled to wake up the system from sleep states, device is not capable to wake up the system from sleep states,
this attribute is not present. this attribute is not present. If the device is not enabled to
wake up the system from sleep states, this attribute is empty.
What: /sys/devices/.../power/wakeup_max_time_ms What: /sys/devices/.../power/wakeup_max_time_ms
Date: September 2010 Date: September 2010
@ -144,8 +154,10 @@ Description:
The /sys/devices/.../wakeup_max_time_ms attribute contains The /sys/devices/.../wakeup_max_time_ms attribute contains
the maximum time of processing a single wakeup event associated the maximum time of processing a single wakeup event associated
with the device, in milliseconds. This attribute is read-only. with the device, in milliseconds. This attribute is read-only.
If the device is not enabled to wake up the system from sleep If the device is not capable to wake up the system from sleep
states, this attribute is not present. states, this attribute is not present. If the device is not
enabled to wake up the system from sleep states, this attribute
is empty.
What: /sys/devices/.../power/wakeup_last_time_ms What: /sys/devices/.../power/wakeup_last_time_ms
Date: September 2010 Date: September 2010
@ -156,7 +168,8 @@ Description:
signaling the last wakeup event associated with the device, in signaling the last wakeup event associated with the device, in
milliseconds. This attribute is read-only. If the device is milliseconds. This attribute is read-only. If the device is
not enabled to wake up the system from sleep states, this not enabled to wake up the system from sleep states, this
attribute is not present. attribute is not present. If the device is not enabled to wake
up the system from sleep states, this attribute is empty.
What: /sys/devices/.../power/wakeup_prevent_sleep_time_ms What: /sys/devices/.../power/wakeup_prevent_sleep_time_ms
Date: February 2012 Date: February 2012
@ -165,9 +178,10 @@ Description:
The /sys/devices/.../wakeup_prevent_sleep_time_ms attribute The /sys/devices/.../wakeup_prevent_sleep_time_ms attribute
contains the total time the device has been preventing contains the total time the device has been preventing
opportunistic transitions to sleep states from occurring. opportunistic transitions to sleep states from occurring.
This attribute is read-only. If the device is not enabled to This attribute is read-only. If the device is not capable to
wake up the system from sleep states, this attribute is not wake up the system from sleep states, this attribute is not
present. present. If the device is not enabled to wake up the system
from sleep states, this attribute is empty.
What: /sys/devices/.../power/autosuspend_delay_ms What: /sys/devices/.../power/autosuspend_delay_ms
Date: September 2010 Date: September 2010