From: Jeremy Fitzhardinge <jeremy@goop.org>
Date: Wed, 7 Dec 2011 19:24:20 +0000 (-0800)
Subject: power_supply: add SCOPE attribute to power supplies
X-Git-Tag: v3.3-rc1~98^2~20^2~3
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=25a0bc2dfc2ea732f40af2dae52426ead66ae76e;p=pandora-kernel.git

power_supply: add SCOPE attribute to power supplies

This adds a "scope" attribute to a power_supply, which indicates how
much of the system it powers.  It appears in sysfs as "scope" or in
the uevent file as POWER_SUPPLY_SCOPE=.  There are presently three
possible values:
	Unknown - unknown power topology
	System - the power supply powers the whole system
	Device - it powers a specific device, or tree of devices

A power supply which doesn't have a "scope" attribute should be assumed to
have "System" scope.

In general, usermode should assume that loss of all System-scoped power
supplies will power off the whole system, but any single one is sufficient
to power the system.

Signed-off-by: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: Richard Hughes <richard@hughsie.com>
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