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 | 18 ++++++++++++++++++ sound/soc/codecs/max98390.h | 1 + 2 files changed, 19 insertions(+)
diff --git a/sound/soc/codecs/max98390.c b/sound/soc/codecs/max98390.c index b392567c2b3e..574d8d5f1119 100644 --- a/sound/soc/codecs/max98390.c +++ b/sound/soc/codecs/max98390.c @@ -1073,6 +1073,24 @@ static int max98390_i2c_probe(struct i2c_client *i2c, return ret; }
+ max98390->reset_gpio = of_get_named_gpio(i2c->dev.of_node, + "maxim,reset-gpios", 0); + + /* Power on device */ + if (gpio_is_valid(max98390->reset_gpio)) { + ret = devm_gpio_request(&i2c->dev, max98390->reset_gpio, + "MAX98390_RESET"); + if (ret) { + dev_err(&i2c->dev, "%s: Failed to request gpio %d\n", + __func__, max98390->reset_gpio); + return -EINVAL; + } + gpio_direction_output(max98390->reset_gpio, 0); + usleep_range(1000, 2000); + gpio_direction_output(max98390->reset_gpio, 1); + usleep_range(1000, 2000); + } + /* Check Revision ID */ ret = regmap_read(max98390->regmap, MAX98390_R24FF_REV_ID, ®); diff --git a/sound/soc/codecs/max98390.h b/sound/soc/codecs/max98390.h index c250740f73a2..5518f2340247 100644 --- a/sound/soc/codecs/max98390.h +++ b/sound/soc/codecs/max98390.h @@ -655,6 +655,7 @@
struct max98390_priv { struct regmap *regmap; + int reset_gpio; unsigned int sysclk; unsigned int master; unsigned int tdm_mode;