tree 3ae08fb9d199813840564fb392ebc9b4a5d8c230
parent c86845dc7b56be050b9e53b31079e8bd0a3dc279
author Mark Brown <broonie@opensource.wolfsonmicro.com> 1322597436 +0000
committer Mark Brown <broonie@opensource.wolfsonmicro.com> 1322597750 +0000

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>