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>
diff --git a/sound/soc/codecs/rt5640.c b/sound/soc/codecs/rt5640.c
index 641eeeb..b0cde92 100644
--- a/sound/soc/codecs/rt5640.c
+++ b/sound/soc/codecs/rt5640.c
@@ -1979,12 +1979,20 @@
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;