[V2 1/2] ASoC: max98390: Add reset gpio control

Steve Lee
2022-03-11T13:29:56Z

Add reset gpio control to support RESET PIN connected to gpio.

Signed-off-by: Steve Lee <steve.lee.analog@gmail.com>
---
sound/soc/codecs/max98390.c | 12 ++++++++++++
1 file changed, 12 insertions(+)

diff --git a/sound/soc/codecs/max98390.c b/sound/soc/codecs/max98390.c
index b392567c2b3e..5c6162701667 100644
--- a/sound/soc/codecs/max98390.c
+++ b/sound/soc/codecs/max98390.c
@@ -1022,6 +1022,7 @@ static int max98390_i2c_probe(struct i2c_client *i2c,

struct max98390_priv *max98390 = NULL;
struct i2c_adapter *adapter = to_i2c_adapter(i2c->dev.parent);
+ struct gpio_desc *reset_gpio;

ret = i2c_check_functionality(adapter,
I2C_FUNC_SMBUS_BYTE
@@ -1073,6 +1074,17 @@ static int max98390_i2c_probe(struct i2c_client *i2c,
return ret;
}

+ reset_gpio = devm_gpiod_get_optional(&i2c->dev,
+ "maxim,reset-gpios", GPIOD_OUT_LOW);
+
+ /* Power on device */
+ if (reset_gpio) {
+ usleep_range(1000, 2000);
+ /* bring out of reset */
+ gpiod_set_value_cansleep(reset_gpio, 1);
+ usleep_range(1000, 2000);
+ }
+
/* Check Revision ID */
ret = regmap_read(max98390->regmap,
MAX98390_R24FF_REV_ID, &reg);
--
2.17.1