diff options
Diffstat (limited to 'sound/soc/codecs/max98088.c')
| -rw-r--r-- | sound/soc/codecs/max98088.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/sound/soc/codecs/max98088.c b/sound/soc/codecs/max98088.c index fb515aaa54fc..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); @@ -1742,9 +1768,19 @@ static const struct i2c_device_id max98088_i2c_id[] = { }; MODULE_DEVICE_TABLE(i2c, max98088_i2c_id); +#if defined(CONFIG_OF) +static const struct of_device_id max98088_of_match[] = { + { .compatible = "maxim,max98088" }, + { .compatible = "maxim,max98089" }, + { } +}; +MODULE_DEVICE_TABLE(of, max98088_of_match); +#endif + static struct i2c_driver max98088_i2c_driver = { .driver = { .name = "max98088", + .of_match_table = of_match_ptr(max98088_of_match), }, .probe = max98088_i2c_probe, .id_table = max98088_i2c_id, |