diff options
| author | Sugar Zhang <sugar.zhang@rock-chips.com> | 2016-02-22 15:56:55 +0800 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2016-02-22 20:05:21 +0900 |
| commit | 6049af00fc2fac8d27f8bd064ff68b16991a80f7 (patch) | |
| tree | c55281881daecb581cc7dd3a462a5e2d78edf234 /sound/soc/codecs/rt5640.c | |
| parent | 92e963f50fc74041b5e9e744c330dca48e04f08d (diff) | |
ASoC: rt5640: add master clock handling for rt5640
enable/disable master clock when codec is active or not.
Signed-off-by: Sugar Zhang <sugar.zhang@rock-chips.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound/soc/codecs/rt5640.c')
| -rw-r--r-- | sound/soc/codecs/rt5640.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/sound/soc/codecs/rt5640.c b/sound/soc/codecs/rt5640.c index 11d032cdc658..6cd84fb2196a 100644 --- a/sound/soc/codecs/rt5640.c +++ b/sound/soc/codecs/rt5640.c @@ -1949,7 +1949,33 @@ static int rt5640_set_dai_pll(struct snd_soc_dai *dai, int pll_id, int source, static int rt5640_set_bias_level(struct snd_soc_codec *codec, enum snd_soc_bias_level level) { + struct rt5640_priv *rt5640 = snd_soc_codec_get_drvdata(codec); + int ret; + switch (level) { + case SND_SOC_BIAS_ON: + break; + + case SND_SOC_BIAS_PREPARE: + /* + * SND_SOC_BIAS_PREPARE is called while preparing for a + * transition to ON or away from ON. If current bias_level + * is SND_SOC_BIAS_ON, then it is preparing for a transition + * away from ON. Disable the clock in that case, otherwise + * enable it. + */ + if (IS_ERR(rt5640->mclk)) + break; + + if (snd_soc_codec_get_bias_level(codec) == SND_SOC_BIAS_ON) { + clk_disable_unprepare(rt5640->mclk); + } else { + ret = clk_prepare_enable(rt5640->mclk); + if (ret) + return ret; + } + break; + case SND_SOC_BIAS_STANDBY: if (SND_SOC_BIAS_OFF == snd_soc_codec_get_bias_level(codec)) { snd_soc_update_bits(codec, RT5640_PWR_ANLG1, @@ -2088,6 +2114,11 @@ static int rt5640_probe(struct snd_soc_codec *codec) struct snd_soc_dapm_context *dapm = snd_soc_codec_get_dapm(codec); struct rt5640_priv *rt5640 = snd_soc_codec_get_drvdata(codec); + /* Check if MCLK provided */ + rt5640->mclk = devm_clk_get(codec->dev, "mclk"); + if (PTR_ERR(rt5640->mclk) == -EPROBE_DEFER) + return -EPROBE_DEFER; + rt5640->codec = codec; snd_soc_codec_force_bias_level(codec, SND_SOC_BIAS_OFF); |