diff options
Diffstat (limited to 'sound/soc/codecs/da7219.c')
| -rw-r--r-- | sound/soc/codecs/da7219.c | 19 |
1 files changed, 12 insertions, 7 deletions
diff --git a/sound/soc/codecs/da7219.c b/sound/soc/codecs/da7219.c index 13009d08b09a..7fdef38ed8cd 100644 --- a/sound/soc/codecs/da7219.c +++ b/sound/soc/codecs/da7219.c @@ -446,7 +446,7 @@ static int da7219_tonegen_freq_put(struct snd_kcontrol *kcontrol, struct soc_mixer_control *mixer_ctrl = (struct soc_mixer_control *) kcontrol->private_value; unsigned int reg = mixer_ctrl->reg; - __le16 val; + __le16 val_new, val_old; int ret; /* @@ -454,13 +454,19 @@ static int da7219_tonegen_freq_put(struct snd_kcontrol *kcontrol, * Therefore we need to convert to little endian here to align with * HW registers. */ - val = cpu_to_le16(ucontrol->value.integer.value[0]); + val_new = cpu_to_le16(ucontrol->value.integer.value[0]); mutex_lock(&da7219->ctrl_lock); - ret = regmap_raw_write(da7219->regmap, reg, &val, sizeof(val)); + ret = regmap_raw_read(da7219->regmap, reg, &val_old, sizeof(val_old)); + if (ret == 0 && (val_old != val_new)) + ret = regmap_raw_write(da7219->regmap, reg, + &val_new, sizeof(val_new)); mutex_unlock(&da7219->ctrl_lock); - return ret; + if (ret < 0) + return ret; + + return val_old != val_new; } @@ -2649,8 +2655,7 @@ static const struct snd_soc_component_driver soc_component_dev_da7219 = { * I2C layer */ -static int da7219_i2c_probe(struct i2c_client *i2c, - const struct i2c_device_id *id) +static int da7219_i2c_probe(struct i2c_client *i2c) { struct device *dev = &i2c->dev; struct da7219_priv *da7219; @@ -2705,7 +2710,7 @@ static struct i2c_driver da7219_i2c_driver = { .of_match_table = of_match_ptr(da7219_of_match), .acpi_match_table = ACPI_PTR(da7219_acpi_match), }, - .probe = da7219_i2c_probe, + .probe_new = da7219_i2c_probe, .remove = da7219_i2c_remove, .id_table = da7219_i2c_id, }; |