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PM / QoS: Drop PM_QOS_FLAG_REMOTE_WAKEUP

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The PM QoS flag PM_QOS_FLAG_REMOTE_WAKEUP is not used consistently
and the vast majority of code simply assumes that remote wakeup
should be enabled for devices in runtime suspend if they can
generate wakeup signals, so drop it.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
This commit is contained in:
Rafael J. Wysocki
2017-10-13 15:27:24 +02:00
parent 8a5776a5f4
commit 20f97caf11
6 changed files with 9 additions and 59 deletions
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13
Documentation/power/pm_qos_interface.txt
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@@ -98,8 +98,7 @@ Values are updated in response to changes of the request list.
The target values of resume latency and active state latency tolerance are
simply the minimum of the request values held in the parameter list elements.
The PM QoS flags aggregate value is a gather (bitwise OR) of all list elements'
values. Two device PM QoS flags are defined currently: PM_QOS_FLAG_NO_POWER_OFF
and PM_QOS_FLAG_REMOTE_WAKEUP.
values. One device PM QoS flag is defined currently: PM_QOS_FLAG_NO_POWER_OFF.
Note: The aggregated target values are implemented in such a way that reading
the aggregated value does not require any locking mechanism.
@@ -153,14 +152,14 @@ PM QoS list of resume latency constraints and remove sysfs attribute
pm_qos_resume_latency_us from the device's power directory.
int dev_pm_qos_expose_flags(device, value)
Add a request to the device's PM QoS list of flags and create sysfs attributes
pm_qos_no_power_off and pm_qos_remote_wakeup under the device's power directory
allowing user space to change these flags' value.
Add a request to the device's PM QoS list of flags and create sysfs attribute
pm_qos_no_power_off under the device's power directory allowing user space to
change the value of the PM_QOS_FLAG_NO_POWER_OFF flag.
void dev_pm_qos_hide_flags(device)
Drop the request added by dev_pm_qos_expose_flags() from the device's PM QoS list
of flags and remove sysfs attributes pm_qos_no_power_off and pm_qos_remote_wakeup
under the device's power directory.
of flags and remove sysfs attribute pm_qos_no_power_off from the device's power
directory.
Notification mechanisms:
The per-device PM QoS framework has a per-device notification tree.