tree 90d1d8572a390c47109bf2fe8da545a60f2f1032
parent e88c9c603b2ad0cd0fbe90afedba3f1becbbeb79
author Rafael J. Wysocki <rafael.j.wysocki@intel.com> 1358428267 +0100
committer Rafael J. Wysocki <rafael.j.wysocki@intel.com> 1358428267 +0100

ACPI: Use system level attribute of wakeup power resources

The system level attribute of ACPI power resources is the lowest
system sleep level (S0, S2 etc.) in which the given resource can be
"on" (ACPI 5.0, Section 7.1).  On the other hand, wakeup power
resources have to be "on" for devices depending on them to be able to
signal wakeup.  Therefore devices cannot wake up the system from
sleep states higher than the minimum of the system level attributes
of their wakeup power resources.

Use the wakeup power resources' system level values to get the
deepest system sleep state (highest system sleep level) the given
device can wake up the system from.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>