tree a05e3bd0d6b59de318f3bfc5557502c13dde1bc4
parent e82374fd1a804e197fc2a54c3930e70c5d300abc
author Matthew Garrett <mjg59@srcf.ucam.org> 1219781399 +0100
committer Anton Vorontsov <cbouatmailru@gmail.com> 1220222574 +0400

power_supply: Add function to return system-wide power state

Certain drivers benefit from knowing whether the system is on ac or
battery, for instance when determining which backlight registers to
read. This adds a simple call to determine whether there's an online
power supply other than any batteries.

Signed-off-by: Matthew Garrett <mjg@redhat.com>
Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>