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ASoC: arizona: Add gating for clock when used for direct MCLK

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Whilst ultimately we would like to move all the clocking over to the
clock framework, as an intermediate step to get people going for now
gating the source clocks for SYSCLK/ASYNCCLK when they are configured
to come directly from an MCLK pin.

Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Tested-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Charles Keepax
2016-10-21 14:15:57 +01:00
committed by Mark Brown
parent 90554f2e2d
commit 7a4413d0dc
7 changed files with 71 additions and 11 deletions
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40
sound/soc/codecs/arizona.c
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@@ -1233,6 +1233,46 @@ static int arizona_set_opclk(struct snd_soc_codec *codec, unsigned int clk,
return -EINVAL;
}
int arizona_clk_ev(struct snd_soc_dapm_widget *w,
struct snd_kcontrol *kcontrol, int event)
{
struct snd_soc_codec *codec = snd_soc_dapm_to_codec(w->dapm);
struct arizona *arizona = dev_get_drvdata(codec->dev->parent);
unsigned int val;
int clk_idx;
int ret;
ret = regmap_read(arizona->regmap, w->reg, &val);
if (ret) {
dev_err(codec->dev, "Failed to check clock source: %d\n", ret);
return ret;
}
val = (val & ARIZONA_SYSCLK_SRC_MASK) >> ARIZONA_SYSCLK_SRC_SHIFT;
switch (val) {
case ARIZONA_CLK_SRC_MCLK1:
clk_idx = ARIZONA_MCLK1;
break;
case ARIZONA_CLK_SRC_MCLK2:
clk_idx = ARIZONA_MCLK2;
break;
default:
return 0;
}
switch (event) {
case SND_SOC_DAPM_PRE_PMU:
return clk_prepare_enable(arizona->mclk[clk_idx]);
case SND_SOC_DAPM_POST_PMD:
clk_disable_unprepare(arizona->mclk[clk_idx]);
return 0;
default:
return 0;
}
}
EXPORT_SYMBOL_GPL(arizona_clk_ev);
int arizona_set_sysclk(struct snd_soc_codec *codec, int clk_id,
int source, unsigned int freq, int dir)
{