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authorEric Nelson <eric@nelint.com>2016-06-07 01:14:52 +0200
committerMark Brown <broonie@kernel.org>2016-06-15 14:09:30 +0100
commit8419caa7270291e26f8b34b12b29680586c85d30 (patch)
treef636a0dca303de3b016e6afbf5a54edf4981fa7c /sound
parent08dea16e0960ea5caf7876045b747145cb677096 (diff)
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ASoC: sgtl5000: Do not disable regulators in SND_SOC_BIAS_OFF
Disabling the SGTL5000 through regulators would certainly save more power than simply disabling the reference voltages as described in the data sheet, but won't properly restore things on resume. This driver does not support active regulators. So we simply disable the reference bias currents. Signed-off-by: Eric Nelson <eric@nelint.com> Signed-off-by: Clemens Gruber <clemens.gruber@pqgruber.com> Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com> Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound')
-rw-r--r--sound/soc/codecs/sgtl5000.c35
1 files changed, 5 insertions, 30 deletions
diff --git a/sound/soc/codecs/sgtl5000.c b/sound/soc/codecs/sgtl5000.c
index 0916bb46ccf2..39a178a88b36 100644
--- a/sound/soc/codecs/sgtl5000.c
+++ b/sound/soc/codecs/sgtl5000.c
@@ -761,42 +761,17 @@ static int sgtl5000_pcm_hw_params(struct snd_pcm_substream *substream,
static int sgtl5000_set_bias_level(struct snd_soc_codec *codec,
enum snd_soc_bias_level level)
{
- int ret;
- struct sgtl5000_priv *sgtl5000 = snd_soc_codec_get_drvdata(codec);
-
switch (level) {
case SND_SOC_BIAS_ON:
case SND_SOC_BIAS_PREPARE:
- break;
case SND_SOC_BIAS_STANDBY:
- if (snd_soc_codec_get_bias_level(codec) == SND_SOC_BIAS_OFF) {
- ret = regulator_bulk_enable(
- sgtl5000->num_supplies,
- sgtl5000->supplies);
- if (ret)
- return ret;
- udelay(10);
-
- regcache_cache_only(sgtl5000->regmap, false);
-
- ret = regcache_sync(sgtl5000->regmap);
- if (ret != 0) {
- dev_err(codec->dev,
- "Failed to restore cache: %d\n", ret);
-
- regcache_cache_only(sgtl5000->regmap, true);
- regulator_bulk_disable(sgtl5000->num_supplies,
- sgtl5000->supplies);
-
- return ret;
- }
- }
-
+ snd_soc_update_bits(codec, SGTL5000_CHIP_ANA_POWER,
+ SGTL5000_REFTOP_POWERUP,
+ SGTL5000_REFTOP_POWERUP);
break;
case SND_SOC_BIAS_OFF:
- regcache_cache_only(sgtl5000->regmap, true);
- regulator_bulk_disable(sgtl5000->num_supplies,
- sgtl5000->supplies);
+ snd_soc_update_bits(codec, SGTL5000_CHIP_ANA_POWER,
+ SGTL5000_REFTOP_POWERUP, 0);
break;
}