renegade-project/linux-next
2
0
Fork 0
mirror of https://github.com/edk2-porting/linux-next.git synced 2025-01-19 11:04:00 +08:00
Code

ASoC: tas2770: Add shutdown capability via a GPIO

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

Signed-off-by: Dan Murphy <dmurphy@ti.com>
Link: https://lore.kernel.org/r/20200923132600.10652-2-dmurphy@ti.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Dan Murphy 2020-09-23 08:25:56 -05:00 committed by Mark Brown
parent 29d7b36ce9
commit 5d0b9dfe0d
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
2 changed files with 40 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

53
sound/soc/codecs/tas2770.c
View File

@ -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;
ret = snd_soc_component_update_bits(component, TAS2770_PWR_CTRL,
TAS2770_PWR_CTRL_MASK,
TAS2770_PWR_CTRL_SHUTDOWN);
if (ret < 0)
return ret;
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;
ret = snd_soc_component_update_bits(component, TAS2770_PWR_CTRL,
TAS2770_PWR_CTRL_MASK,
TAS2770_PWR_CTRL_ACTIVE);
if (ret < 0)
return ret;
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;
}

1
sound/soc/codecs/tas2770.h
View File

@ -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;