From: Steve Lee steve.lee.analog@gmail.com Sent: Monday, March 28, 2022 4:12 AM To: lgirdwood@gmail.com; broonie@kernel.org; perex@perex.cz; tiwai@suse.com; ryans.lee@maximintegrated.com; linux- kernel@vger.kernel.org; alsa-devel@alsa-project.org Cc: krzk@kernel.org; Sa, Nuno Nuno.Sa@analog.com; Steve Lee steve.lee.analog@gmail.com Subject: [V3 1/2] ASoC: max98390: Add reset gpio control
[External]
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 40fd6f363f35..05df9b85d9b0 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_LOW);- /* Power on device */
- if (reset_gpio) {
usleep_range(1000, 2000);/* bring out of reset */gpiod_set_value_cansleep(reset_gpio, 1);
Note this will set the gpio in the asserted state. Being it active low, this will do the opposite thing that you are trying to accomplish...
- Nuno Sá