From: Axel Lin <axel.lin@gmail.com>
Date: Tue, 4 Oct 2011 12:07:03 +0000 (+0800)
Subject: ASoC: wm8994: Slightly optimize configure_clock
X-Git-Tag: v3.2-rc1~127^2~1^2~165
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=04f45c493ac6de7c3d1864c3193c225424c25b7d;p=pandora-kernel.git

ASoC: wm8994: Slightly optimize configure_clock

snd_soc_update_bits() will only write new register value
if the old value is different from the new value.
In additional, snd_soc_update_bits() returns 0 for no change.
No need to read WM8994_CLOCKING_1 register before calling snd_soc_update_bits().

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
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