1What:		/sys/devices/.../power_state
2Date:		January 2013
3Contact:	Rafael J. Wysocki <rafael.j.wysocki@intel.com>
4Description:
5		The /sys/devices/.../power_state attribute is only present for
6		device objects representing ACPI device nodes that provide power
7		management methods.
8
9		If present, it contains a string representing the current ACPI
10		power state of the given device node.  Its possible values,
11		"D0", "D1", "D2", "D3hot", and "D3cold", reflect the power state
12		names defined by the ACPI specification (ACPI 4 and above).
13
14		If the device node uses shared ACPI power resources, this state
15		determines a list of power resources required not to be turned
16		off.  However, some power resources needed by the device node in
17		higher-power (lower-number) states may also be ON because of
18		some other devices using them at the moment.
19
20		This attribute is read-only.
21