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Commit 05f33bc5 authored by Nicolin Chen's avatar Nicolin Chen Committed by Mark Brown
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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: default avatarNicolin Chen <nicoleotsuka@gmail.com>
Acked-by: default avatarPaul Handrigan <Paul.Handrigan@cirrus.com>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent b0e71c0d

Documentation/devicetree/bindings/sound/cs53l30.txt

+4 −0
Original line number Diff line number Diff line
@@ -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

sound/soc/codecs/cs53l30.c

+30 −0
Original line number Diff line number Diff line
@@ -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);

sound/soc/codecs/cs53l30.h

+1 −0
Original line number Diff line number Diff line
@@ -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 */