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Subject[PATCH v3 1/2] ASoC: max98927: Handle reset gpio when probing i2c
Date
From: Alejandro Tafalla <atafalla@dnyon.com>

Drive the reset gpio if defined in the DTS node.

Signed-off-by: Alejandro Tafalla <atafalla@dnyon.com>
---
sound/soc/codecs/max98927.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)

diff --git a/sound/soc/codecs/max98927.c b/sound/soc/codecs/max98927.c
index 8b206ee77709..daf06b503433 100644
--- a/sound/soc/codecs/max98927.c
+++ b/sound/soc/codecs/max98927.c
@@ -868,6 +868,7 @@ static int max98927_i2c_probe(struct i2c_client *i2c,
int ret = 0, value;
int reg = 0;
struct max98927_priv *max98927 = NULL;
+ struct gpio_desc *reset_gpio;

max98927 = devm_kzalloc(&i2c->dev,
sizeof(*max98927), GFP_KERNEL);
@@ -898,6 +899,19 @@ static int max98927_i2c_probe(struct i2c_client *i2c,
return ret;
}

+ reset_gpio
+ = devm_gpiod_get_optional(&i2c->dev, "reset", GPIOD_OUT_LOW);
+ if (IS_ERR(reset_gpio)) {
+ ret = PTR_ERR(reset_gpio);
+ return dev_err_probe(&i2c->dev, ret, "failed to request GPIO reset pin");
+ }
+
+ if (reset_gpio) {
+ usleep_range(8000, 10000);
+ gpiod_set_value_cansleep(reset_gpio, 1);
+ usleep_range(1000, 5000);
+ }
+
/* Check Revision ID */
ret = regmap_read(max98927->regmap,
MAX98927_R01FF_REV_ID, &reg);
--
2.33.0
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