Add reset gpio control to support RESET PIN connected to gpio.
Signed-off-by: Steve Lee <[email protected]>
---
V3 -> V4: change reset gpio control as GPIO_ACTIVE_LOW in DT
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 40fd6f363f35..bdfd6cccc3d2 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 = i2c->adapter;
+ 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,
+ "reset", GPIOD_OUT_HIGH);
+
+ /* Power on device */
+ if (reset_gpio) {
+ usleep_range(1000, 2000);
+ /* bring out of reset */
+ gpiod_set_value_cansleep(reset_gpio, 0);
+ usleep_range(1000, 2000);
+ }
+
/* Check Revision ID */
ret = regmap_read(max98390->regmap,
MAX98390_R24FF_REV_ID, ®);
--
2.17.1