Add the hardware shutdown mechanism to shutdown and wake up the device via a GPIO.
Signed-off-by: Dan Murphy dmurphy@ti.com --- sound/soc/codecs/tas2770.c | 53 ++++++++++++++++++++++++++++---------- sound/soc/codecs/tas2770.h | 1 + 2 files changed, 40 insertions(+), 14 deletions(-)
diff --git a/sound/soc/codecs/tas2770.c b/sound/soc/codecs/tas2770.c index 386aaa11fa08..9f7363927c50 100644 --- a/sound/soc/codecs/tas2770.c +++ b/sound/soc/codecs/tas2770.c @@ -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; }
diff --git a/sound/soc/codecs/tas2770.h b/sound/soc/codecs/tas2770.h index 07e3556fc702..b3fc4a487033 100644 --- a/sound/soc/codecs/tas2770.h +++ b/sound/soc/codecs/tas2770.h @@ -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;