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ASoC: cs53l30: Add MUTE pin control support via GPIO 

The codec chip has a physical MUTE pin to let users control it via
GPIO. So this patch add a mute control support to the driver.

Signed-off-by: Nicolin Chen <nicoleotsuka@gmail.com>
Acked-by: Paul Handrigan <Paul.Handrigan@cirrus.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Nicolin Chen 2016-06-21 16:50:13 -07:00 committed by Mark Brown
parent b0e71c0ddd
commit 05f33bc5d6
3 changed files with 35 additions and 0 deletions
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4
Documentation/devicetree/bindings/sound/cs53l30.txt
View File

@ -13,6 +13,10 @@ Optional properties:
- reset-gpios : a GPIO spec for the reset pin.
- mute-gpios : a GPIO spec for the MUTE pin. The active state can be either
GPIO_ACTIVE_HIGH or GPIO_ACTIVE_LOW, which would be handled
by the driver automatically.
- cirrus,micbias-lvl : Set the output voltage level on the MICBIAS Pin.
0 = Hi-Z
1 = 1.80 V

30
sound/soc/codecs/cs53l30.c
View File

@ -35,6 +35,7 @@ struct cs53l30_private {
struct regulator_bulk_data supplies[CS53L30_NUM_SUPPLIES];
struct regmap *regmap;
struct gpio_desc *reset_gpio;
struct gpio_desc *mute_gpio;
struct clk *mclk;
bool use_sdout2;
u32 mclk_rate;
@ -833,6 +834,16 @@ static int cs53l30_set_dai_tdm_slot(struct snd_soc_dai *dai,
return 0;
}
static int cs53l30_mute_stream(struct snd_soc_dai *dai, int mute, int stream)
{
struct cs53l30_private *priv = snd_soc_codec_get_drvdata(dai->codec);
if (priv->mute_gpio)
gpiod_set_value_cansleep(priv->mute_gpio, mute);
return 0;
}
/* SNDRV_PCM_RATE_KNOT -> 12000, 24000 Hz, limit with constraint list */
#define CS53L30_RATES (SNDRV_PCM_RATE_8000_48000 | SNDRV_PCM_RATE_KNOT)
@ -846,6 +857,7 @@ static const struct snd_soc_dai_ops cs53l30_ops = {
.set_sysclk = cs53l30_set_sysclk,
.set_tristate = cs53l30_set_tristate,
.set_tdm_slot = cs53l30_set_dai_tdm_slot,
.mute_stream = cs53l30_mute_stream,
};
static struct snd_soc_dai_driver cs53l30_dai = {
@ -991,6 +1003,24 @@ static int cs53l30_i2c_probe(struct i2c_client *client,
cs53l30->mclk = NULL;
}
/* Fetch the MUTE control */
cs53l30->mute_gpio = devm_gpiod_get_optional(dev, "mute",
GPIOD_OUT_HIGH);
if (IS_ERR(cs53l30->mute_gpio)) {
ret = PTR_ERR(cs53l30->mute_gpio);
goto error;
}
if (cs53l30->mute_gpio) {
/* Enable MUTE controls via MUTE pin */
regmap_write(cs53l30->regmap, CS53L30_MUTEP_CTL1,
CS53L30_MUTEP_CTL1_MUTEALL);
/* Flip the polarity of MUTE pin */
if (gpiod_is_active_low(cs53l30->mute_gpio))
regmap_update_bits(cs53l30->regmap, CS53L30_MUTEP_CTL2,
CS53L30_MUTE_PIN_POLARITY, 0);
}
if (!of_property_read_u8(np, "cirrus,micbias-lvl", &val))
regmap_update_bits(cs53l30->regmap, CS53L30_MICBIAS_CTL,
CS53L30_MIC_BIAS_CTRL_MASK, val);

1
sound/soc/codecs/cs53l30.h
View File

@ -253,6 +253,7 @@
#define CS53L30_MUTE_MB_ALL_PDN_MASK (1 << CS53L30_MUTE_MB_ALL_PDN_SHIFT)
#define CS53L30_MUTE_MB_ALL_PDN (1 << CS53L30_MUTE_MB_ALL_PDN_SHIFT)
#define CS53L30_MUTEP_CTL1_MUTEALL (0xdf)
#define CS53L30_MUTEP_CTL1_DEFAULT (0)
/* R32 (0x20) CS53L30_MUTEP_CTL2 - MUTE Pin Control 2 */