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Diffstat (limited to 'Documentation/ABI/testing/sysfs-devices-power')
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diff --git a/Documentation/ABI/testing/sysfs-devices-power b/Documentation/ABI/testing/sysfs-devices-power deleted file mode 100644 index 45000f0db4d..00000000000 --- a/Documentation/ABI/testing/sysfs-devices-power +++ /dev/null @@ -1,206 +0,0 @@ -What: /sys/devices/.../power/ -Date: January 2009 -Contact: Rafael J. Wysocki <rjw@sisk.pl> -Description: - The /sys/devices/.../power directory contains attributes - allowing the user space to check and modify some power - management related properties of given device. - -What: /sys/devices/.../power/wakeup -Date: January 2009 -Contact: Rafael J. Wysocki <rjw@sisk.pl> -Description: - The /sys/devices/.../power/wakeup attribute allows the user - space to check if the device is enabled to wake up the system - from sleep states, such as the memory sleep state (suspend to - RAM) and hibernation (suspend to disk), and to enable or disable - it to do that as desired. - - Some devices support "wakeup" events, which are hardware signals - used to activate the system from a sleep state. Such devices - have one of the following two values for the sysfs power/wakeup - file: - - + "enabled\n" to issue the events; - + "disabled\n" not to do so; - - In that cases the user space can change the setting represented - by the contents of this file by writing either "enabled", or - "disabled" to it. - - For the devices that are not capable of generating system wakeup - events this file is not present. In that case the device cannot - be enabled to wake up the system from sleep states. - -What: /sys/devices/.../power/control -Date: January 2009 -Contact: Rafael J. Wysocki <rjw@sisk.pl> -Description: - The /sys/devices/.../power/control attribute allows the user - space to control the run-time power management of the device. - - All devices have one of the following two values for the - power/control file: - - + "auto\n" to allow the device to be power managed at run time; - + "on\n" to prevent the device from being power managed; - - The default for all devices is "auto", which means that they may - be subject to automatic power management, depending on their - drivers. Changing this attribute to "on" prevents the driver - from power managing the device at run time. Doing that while - the device is suspended causes it to be woken up. - -What: /sys/devices/.../power/async -Date: January 2009 -Contact: Rafael J. Wysocki <rjw@sisk.pl> -Description: - The /sys/devices/.../async attribute allows the user space to - enable or diasble the device's suspend and resume callbacks to - be executed asynchronously (ie. in separate threads, in parallel - with the main suspend/resume thread) during system-wide power - transitions (eg. suspend to RAM, hibernation). - - All devices have one of the following two values for the - power/async file: - - + "enabled\n" to permit the asynchronous suspend/resume; - + "disabled\n" to forbid it; - - The value of this attribute may be changed by writing either - "enabled", or "disabled" to it. - - It generally is unsafe to permit the asynchronous suspend/resume - of a device unless it is certain that all of the PM dependencies - of the device are known to the PM core. However, for some - devices this attribute is set to "enabled" by bus type code or - device drivers and in that cases it should be safe to leave the - default value. - -What: /sys/devices/.../power/wakeup_count -Date: September 2010 -Contact: Rafael J. Wysocki <rjw@sisk.pl> -Description: - The /sys/devices/.../wakeup_count attribute contains the number - of signaled wakeup events associated with the device. This - attribute is read-only. If the device is not enabled to wake up - the system from sleep states, this attribute is not present. - -What: /sys/devices/.../power/wakeup_active_count -Date: September 2010 -Contact: Rafael J. Wysocki <rjw@sisk.pl> -Description: - The /sys/devices/.../wakeup_active_count attribute contains the - number of times the processing of wakeup events associated with - the device was completed (at the kernel level). This attribute - is read-only. If the device is not enabled to wake up the - system from sleep states, this attribute is not present. - -What: /sys/devices/.../power/wakeup_abort_count -Date: February 2012 -Contact: Rafael J. Wysocki <rjw@sisk.pl> -Description: - The /sys/devices/.../wakeup_abort_count attribute contains the - number of times the processing of a wakeup event associated with - the device might have aborted system transition into a sleep - state in progress. This attribute is read-only. If the device - is not enabled to wake up the system from sleep states, this - attribute is not present. - -What: /sys/devices/.../power/wakeup_expire_count -Date: February 2012 -Contact: Rafael J. Wysocki <rjw@sisk.pl> -Description: - The /sys/devices/.../wakeup_expire_count attribute contains the - number of times a wakeup event associated with the device has - been reported with a timeout that expired. This attribute is - read-only. If the device is not enabled to wake up the system - from sleep states, this attribute is not present. - -What: /sys/devices/.../power/wakeup_active -Date: September 2010 -Contact: Rafael J. Wysocki <rjw@sisk.pl> -Description: - The /sys/devices/.../wakeup_active attribute contains either 1, - or 0, depending on whether or not a wakeup event associated with - the device is being processed (1). This attribute is read-only. - If the device is not enabled to wake up the system from sleep - states, this attribute is not present. - -What: /sys/devices/.../power/wakeup_total_time_ms -Date: September 2010 -Contact: Rafael J. Wysocki <rjw@sisk.pl> -Description: - The /sys/devices/.../wakeup_total_time_ms attribute contains - the total time of processing wakeup events associated with the - device, in milliseconds. This attribute is read-only. If the - device is not enabled to wake up the system from sleep states, - this attribute is not present. - -What: /sys/devices/.../power/wakeup_max_time_ms -Date: September 2010 -Contact: Rafael J. Wysocki <rjw@sisk.pl> -Description: - The /sys/devices/.../wakeup_max_time_ms attribute contains - the maximum time of processing a single wakeup event associated - with the device, in milliseconds. This attribute is read-only. - If the device is not enabled to wake up the system from sleep - states, this attribute is not present. - -What: /sys/devices/.../power/wakeup_last_time_ms -Date: September 2010 -Contact: Rafael J. Wysocki <rjw@sisk.pl> -Description: - The /sys/devices/.../wakeup_last_time_ms attribute contains - the value of the monotonic clock corresponding to the time of - signaling the last wakeup event associated with the device, in - milliseconds. This attribute is read-only. If the device is - not enabled to wake up the system from sleep states, this - attribute is not present. - -What: /sys/devices/.../power/wakeup_prevent_sleep_time_ms -Date: February 2012 -Contact: Rafael J. Wysocki <rjw@sisk.pl> -Description: - The /sys/devices/.../wakeup_prevent_sleep_time_ms attribute - contains the total time the device has been preventing - opportunistic transitions to sleep states from occuring. - This attribute is read-only. If the device is not enabled to - wake up the system from sleep states, this attribute is not - present. - -What: /sys/devices/.../power/autosuspend_delay_ms -Date: September 2010 -Contact: Alan Stern <stern@rowland.harvard.edu> -Description: - The /sys/devices/.../power/autosuspend_delay_ms attribute - contains the autosuspend delay value (in milliseconds). Some - drivers do not want their device to suspend as soon as it - becomes idle at run time; they want the device to remain - inactive for a certain minimum period of time first. That - period is called the autosuspend delay. Negative values will - prevent the device from being suspended at run time (similar - to writing "on" to the power/control attribute). Values >= - 1000 will cause the autosuspend timer expiration to be rounded - up to the nearest second. - - Not all drivers support this attribute. If it isn't supported, - attempts to read or write it will yield I/O errors. - -What: /sys/devices/.../power/pm_qos_latency_us -Date: March 2012 -Contact: Rafael J. Wysocki <rjw@sisk.pl> -Description: - The /sys/devices/.../power/pm_qos_resume_latency_us attribute - contains the PM QoS resume latency limit for the given device, - which is the maximum allowed time it can take to resume the - device, after it has been suspended at run time, from a resume - request to the moment the device will be ready to process I/O, - in microseconds. If it is equal to 0, however, this means that - the PM QoS resume latency may be arbitrary. - - Not all drivers support this attribute. If it isn't supported, - it is not present. - - This attribute has no effect on system-wide suspend/resume and - hibernation. |