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ASoC: rt5640: Power down LDO while suspended 

If we have control over the LDO then disable it during suspend; the device
is already being put into reset so will be non-functional over suspend
anyway and this will save a small amount of power.

Signed-off-by: Mark Brown <broonie@linaro.org>
Tested-by: Stephen Warren <swarren@nvidia.com>
This commit is contained in:
Mark Brown 2013-10-16 17:26:22 +01:00
parent 32fcb97b9f
commit e58f301ec9
1 changed files with 8 additions and 0 deletions
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8
sound/soc/codecs/rt5640.c
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@ -1979,12 +1979,20 @@ static int rt5640_suspend(struct snd_soc_codec *codec)
rt5640_reset(codec);
regcache_cache_only(rt5640->regmap, true);
regcache_mark_dirty(rt5640->regmap);
if (gpio_is_valid(rt5640->pdata.ldo1_en))
gpio_set_value_cansleep(rt5640->pdata.ldo1_en, 0);
return 0;
}
static int rt5640_resume(struct snd_soc_codec *codec)
{
struct rt5640_priv *rt5640 = snd_soc_codec_get_drvdata(codec);
if (gpio_is_valid(rt5640->pdata.ldo1_en)) {
gpio_set_value_cansleep(rt5640->pdata.ldo1_en, 1);
msleep(400);
}
rt5640_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
return 0;