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ASoC: Suppress noop SYSCLK updates in WM8915

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Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@ti.com>
This commit is contained in:
Mark Brown 2011-06-03 17:09:49 +01:00
parent 84abd1b395
commit ea7b437836
1 changed files with 6 additions and 0 deletions
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6
sound/soc/codecs/wm8915.c
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@ -55,6 +55,7 @@ struct wm8915_priv {
int ldo1ena;
int sysclk;
int sysclk_src;
int fll_src;
int fll_fref;
@ -1834,6 +1835,9 @@ static int wm8915_set_sysclk(struct snd_soc_dai *dai,
int src;
int old;
if (freq == wm8915->sysclk && clk_id == wm8915->sysclk_src)
return 0;
/* Disable SYSCLK while we reconfigure */
old = snd_soc_read(codec, WM8915_AIF_CLOCKING_1) & WM8915_SYSCLK_ENA;
snd_soc_update_bits(codec, WM8915_AIF_CLOCKING_1,
@ -1885,6 +1889,8 @@ static int wm8915_set_sysclk(struct snd_soc_dai *dai,
snd_soc_update_bits(codec, WM8915_AIF_CLOCKING_1,
WM8915_SYSCLK_ENA, old);
wm8915->sysclk_src = clk_id;
return 0;
}