Add reset gpio control to support RESET PIN connected to gpio.
Signed-off-by: Steve Lee steve.lee.analog@gmail.com --- 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, ®);