diff options
| author | Andreas Färber <afaerber@suse.de> | 2018-10-05 09:58:11 +0200 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2018-10-08 20:46:15 +0200 |
| commit | 62a7fc32a6289dce88787da03f893deab08158c3 (patch) | |
| tree | 437843b91a7d6d9cb41a63a94f4607cbb8258e50 /sound/soc/codecs | |
| parent | ASoC: dt-bindings: max98088: add external clock binding (diff) | |
| download | linux-62a7fc32a6289dce88787da03f893deab08158c3.tar.xz linux-62a7fc32a6289dce88787da03f893deab08158c3.zip | |
ASoC: max98088: Add master clock handling
If master clock is provided through device tree, then update
the master clock frequency during set_sysclk.
Cc: Tushar Behera <tushar.behera@linaro.org>
Signed-off-by: Andreas Färber <afaerber@suse.de>
Acked-by: Tushar Behera <trblinux@gmail.com>
Reviewed-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
[m.felsch@pengutronix.de: move mclk request to i2c_probe]
[m.felsch@pengutronix.de: make use of snd_soc_component_get_bias_level()]
Signed-off-by: Marco Felsch <m.felsch@pengutronix.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound/soc/codecs')
| -rw-r--r-- | sound/soc/codecs/max98088.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/sound/soc/codecs/max98088.c b/sound/soc/codecs/max98088.c index 9450d5d9c492..ca172a4b6849 100644 --- a/sound/soc/codecs/max98088.c +++ b/sound/soc/codecs/max98088.c @@ -16,6 +16,7 @@ #include <linux/pm.h> #include <linux/i2c.h> #include <linux/regmap.h> +#include <linux/clk.h> #include <sound/core.h> #include <sound/pcm.h> #include <sound/pcm_params.h> @@ -42,6 +43,7 @@ struct max98088_priv { struct regmap *regmap; enum max98088_type devtype; struct max98088_pdata *pdata; + struct clk *mclk; unsigned int sysclk; struct max98088_cdata dai[2]; int eq_textcnt; @@ -1103,6 +1105,11 @@ static int max98088_dai_set_sysclk(struct snd_soc_dai *dai, if (freq == max98088->sysclk) return 0; + if (!IS_ERR(max98088->mclk)) { + freq = clk_round_rate(max98088->mclk, freq); + clk_set_rate(max98088->mclk, freq); + } + /* Setup clocks for slave mode, and using the PLL * PSCLK = 0x01 (when master clk is 10MHz to 20MHz) * 0x02 (when master clk is 20MHz to 30MHz).. @@ -1310,6 +1317,20 @@ static int max98088_set_bias_level(struct snd_soc_component *component, 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(max98088->mclk)) { + if (snd_soc_component_get_bias_level(component) == + SND_SOC_BIAS_ON) + clk_disable_unprepare(max98088->mclk); + else + clk_prepare_enable(max98088->mclk); + } break; case SND_SOC_BIAS_STANDBY: @@ -1725,6 +1746,11 @@ static int max98088_i2c_probe(struct i2c_client *i2c, if (IS_ERR(max98088->regmap)) return PTR_ERR(max98088->regmap); + max98088->mclk = devm_clk_get(&i2c->dev, "mclk"); + if (IS_ERR(max98088->mclk)) + if (PTR_ERR(max98088->mclk) == -EPROBE_DEFER) + return PTR_ERR(max98088->mclk); + max98088->devtype = id->driver_data; i2c_set_clientdata(i2c, max98088); |