From 397ff024960634962af93e9e2775fc0e4fe7de92 Mon Sep 17 00:00:00 2001 From: Steve Lee Date: Wed, 20 Apr 2022 13:48:59 +0900 Subject: [PATCH] ASoC: max98390: Add reset gpio control MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Add reset gpio control to support RESET PIN connected to gpio. Signed-off-by: Steve Lee Acked-by: Nuno Sá Link: https://lore.kernel.org/r/20220420044900.2989-1-steve.lee.analog@gmail.com Signed-off-by: Mark Brown --- 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 d1fed8e..2a6b164 100644 --- a/sound/soc/codecs/max98390.c +++ b/sound/soc/codecs/max98390.c @@ -1021,6 +1021,7 @@ 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 @@ -1072,6 +1073,17 @@ 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, ®); -- 2.7.4