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 atafalla@dnyon.com --- 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;