The max98927 codec on some devices requires pulling a reset gpio before
responding to any i2c command. This commit adds support for it through
an optional reset-gpios property.
Signed-off-by: Alejandro Tafalla <[email protected]>
---
sound/soc/codecs/max98927.c | 25 +++++++++++++++++++++++++
sound/soc/codecs/max98927.h | 1 +
2 files changed, 26 insertions(+)
diff --git a/sound/soc/codecs/max98927.c b/sound/soc/codecs/max98927.c
index 8b206ee77709..5ba5f876eab8 100644
--- a/sound/soc/codecs/max98927.c
+++ b/sound/soc/codecs/max98927.c
@@ -897,6 +897,19 @@ static int max98927_i2c_probe(struct i2c_client *i2c,
"Failed to allocate regmap: %d\n", ret);
return ret;
}
+
+ max98927->reset_gpio
+ = devm_gpiod_get_optional(&i2c->dev, "reset", GPIOD_OUT_HIGH);
+ if (IS_ERR(max98927->reset_gpio)) {
+ ret = PTR_ERR(max98927->reset_gpio);
+ return dev_err_probe(&i2c->dev, ret, "failed to request GPIO reset pin");
+ }
+
+ if (max98927->reset_gpio) {
+ gpiod_set_value_cansleep(max98927->reset_gpio, 0);
+ /* Wait for i2c port to be ready */
+ usleep_range(5000, 6000);
+ }
/* Check Revision ID */
ret = regmap_read(max98927->regmap,
@@ -921,6 +934,17 @@ static int max98927_i2c_probe(struct i2c_client *i2c,
return ret;
}
+static int max98927_i2c_remove(struct i2c_client *i2c)
+{
+ struct max98927_priv *max98927 = i2c_get_clientdata(i2c);
+
+ if (max98927->reset_gpio) {
+ gpiod_set_value_cansleep(max98927->reset_gpio, 1);
+ }
+
+ return 0;
+}
+
static const struct i2c_device_id max98927_i2c_id[] = {
{ "max98927", 0},
{ },
@@ -952,6 +976,7 @@ static struct i2c_driver max98927_i2c_driver = {
.pm = &max98927_pm,
},
.probe = max98927_i2c_probe,
+ .remove = max98927_i2c_remove,
.id_table = max98927_i2c_id,
};
diff --git a/sound/soc/codecs/max98927.h b/sound/soc/codecs/max98927.h
index 05f495db914d..13f5066d7419 100644
--- a/sound/soc/codecs/max98927.h
+++ b/sound/soc/codecs/max98927.h
@@ -255,6 +255,7 @@ struct max98927_priv {
struct regmap *regmap;
struct snd_soc_component *component;
struct max98927_pdata *pdata;
+ struct gpio_desc *reset_gpio;
unsigned int spk_gain;
unsigned int sysclk;
unsigned int v_l_slot;
--
2.33.0