From: Mark Brown <broonie@opensource.wolfsonmicro.com>
Date: Tue, 29 Nov 2011 20:10:36 +0000 (+0000)
Subject: regmap: Allow regmap_update_bits() users to detect changes
X-Git-Tag: v3.3-rc1~163^2~8
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=018690d33ecf4aa1eb1415e38c40e2b0b6c7808e;p=pandora-kernel.git

regmap: Allow regmap_update_bits() users to detect changes

Some users of regmap_update_bits() would like to be able to tell their
users if they actually did an update so provide a variant which also
returns a flag indicating if an update took place. We could return a
tristate in the return value of regmap_update_bits() but this makes the
API more cumbersome to use and doesn't fit with the general zero for
success idiom we have.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
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