Unverified Commit 5d0b9dfe authored by Dan Murphy's avatar Dan Murphy Committed by Mark Brown
Browse files

ASoC: tas2770: Add shutdown capability via a GPIO 



Add the hardware shutdown mechanism to shutdown and wake up the device
via a GPIO.

Signed-off-by: default avatarDan Murphy <dmurphy@ti.com>
Link: https://lore.kernel.org/r/20200923132600.10652-2-dmurphy@ti.com


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 29d7b36c

sound/soc/codecs/tas2770.c

+39 −14
Original line number Diff line number Diff line
@@ -79,28 +79,42 @@ static int tas2770_set_bias_level(struct snd_soc_component *component, 
#ifdef CONFIG_PM

static int tas2770_codec_suspend(struct snd_soc_component *component)

{

	int ret;

	struct tas2770_priv *tas2770 = snd_soc_component_get_drvdata(component);

	int ret = 0;



	if (tas2770->sdz_gpio) {

		gpiod_set_value_cansleep(tas2770->sdz_gpio, 0);

	} else {

		ret = snd_soc_component_update_bits(component, TAS2770_PWR_CTRL,

						    TAS2770_PWR_CTRL_MASK,

						    TAS2770_PWR_CTRL_SHUTDOWN);

		if (ret < 0)

			return ret;



	return 0;

		ret = 0;

	}



	return ret;

}



static int tas2770_codec_resume(struct snd_soc_component *component)

{

	int ret;

	struct tas2770_priv *tas2770 = snd_soc_component_get_drvdata(component);

	int ret = 0;



	if (tas2770->sdz_gpio) {

		gpiod_set_value_cansleep(tas2770->sdz_gpio, 1);

	} else {

		ret = snd_soc_component_update_bits(component, TAS2770_PWR_CTRL,

						    TAS2770_PWR_CTRL_MASK,

						    TAS2770_PWR_CTRL_ACTIVE);

		if (ret < 0)

			return ret;



	return 0;

		ret = 0;

	}



	return ret;

}

#else

#define tas2770_codec_suspend NULL
@@ -498,6 +512,9 @@ static int tas2770_codec_probe(struct snd_soc_component *component) 


	tas2770->component = component;



	if (tas2770->sdz_gpio)

		gpiod_set_value_cansleep(tas2770->sdz_gpio, 1);



	tas2770_reset(tas2770);



	return 0;
@@ -650,6 +667,14 @@ static int tas2770_parse_dt(struct device *dev, struct tas2770_priv *tas2770) 
		tas2770->v_sense_slot = 2;

	}



	tas2770->sdz_gpio = devm_gpiod_get_optional(dev, "shutdown", GPIOD_OUT_HIGH);

	if (IS_ERR(tas2770->sdz_gpio)) {

		if (PTR_ERR(tas2770->sdz_gpio) == -EPROBE_DEFER)

			return -EPROBE_DEFER;



		tas2770->sdz_gpio = NULL;

	}



	return 0;

}

sound/soc/codecs/tas2770.h

+1 −0
Original line number Diff line number Diff line
@@ -134,6 +134,7 @@ struct tas2770_priv { 
	int power_state;

	int asi_format;

	struct gpio_desc *reset_gpio;

	struct gpio_desc *sdz_gpio;

	int sampling_rate;

	int channel_size;

	int slot_width;