diff options
| author | Sugar Zhang <sugar.zhang@rock-chips.com> | 2016-02-22 07:56:55 (GMT) |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2016-02-22 11:05:21 (GMT) |
| commit | 6049af00fc2fac8d27f8bd064ff68b16991a80f7 (patch) | |
| tree | c55281881daecb581cc7dd3a462a5e2d78edf234 | |
| parent | 92e963f50fc74041b5e9e744c330dca48e04f08d (diff) | |
| download | linux-6049af00fc2fac8d27f8bd064ff68b16991a80f7.tar.xz | |
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>
| -rw-r--r-- | Documentation/devicetree/bindings/sound/rt5640.txt | 3 | ||||
| -rw-r--r-- | sound/soc/codecs/rt5640.c | 31 | ||||
| -rw-r--r-- | sound/soc/codecs/rt5640.h | 2 |
3 files changed, 36 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/sound/rt5640.txt b/Documentation/devicetree/bindings/sound/rt5640.txt index 9e62f6e..57fe646 100644 --- a/Documentation/devicetree/bindings/sound/rt5640.txt +++ b/Documentation/devicetree/bindings/sound/rt5640.txt @@ -12,6 +12,9 @@ Required properties: Optional properties: +- clocks: The phandle of the master clock to the CODEC +- clock-names: Should be "mclk" + - realtek,in1-differential - realtek,in2-differential - realtek,in3-differential diff --git a/sound/soc/codecs/rt5640.c b/sound/soc/codecs/rt5640.c index 11d032c..6cd84fb 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); diff --git a/sound/soc/codecs/rt5640.h b/sound/soc/codecs/rt5640.h index 83a7150..1761c3a9 100644 --- a/sound/soc/codecs/rt5640.h +++ b/sound/soc/codecs/rt5640.h @@ -12,6 +12,7 @@ #ifndef _RT5640_H #define _RT5640_H +#include <linux/clk.h> #include <sound/rt5640.h> /* Info */ @@ -2097,6 +2098,7 @@ struct rt5640_priv { struct snd_soc_codec *codec; struct rt5640_platform_data pdata; struct regmap *regmap; + struct clk *mclk; int sysclk; int sysclk_src; |