To fix pop noise when shutdown,the pop noise during shutdown is the pmic cutoff power of codec without any notice.

Signed-off-by: jay.xu xjq@rock-chips.com Signed-off-by: zhengxing zhengxing@rock-chips.com Signed-off-by: Caesar Wang wxt@rock-chips.com

Serien-cc: linux-kernel@vger.kernel.org Serien-cc: devicetree@vger.kernel.org Serien-cc: dianders@chromium.org

---

Changes in v2: - remove the dev_info(..) - fix the comment style - add the max98090_i2c_shutdown() in remove() fuction

sound/soc/codecs/max98090.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+)

diff --git a/sound/soc/codecs/max98090.c b/sound/soc/codecs/max98090.c index b112b1c..e59013a 100644 --- a/sound/soc/codecs/max98090.c +++ b/sound/soc/codecs/max98090.c @@ -2607,10 +2607,26 @@ err_enable:

static int max98090_i2c_remove(struct i2c_client *client) { + max98090_i2c_shutdown(client); snd_soc_unregister_codec(&client->dev); return 0; }

+static void max98090_i2c_shutdown(struct i2c_client *i2c) +{ + struct max98090_priv *max98090 = dev_get_drvdata(&i2c->dev); + + /* + * Enable volume smoothing, disable zero cross. This will cause + * a quick 40ms ramp to mute on shutdown. + */ + regmap_write(max98090->regmap, + M98090_REG_LEVEL_CONTROL, M98090_VSENN_MASK); + regmap_write(max98090->regmap, + M98090_REG_DEVICE_SHUTDOWN, 0x00); + msleep(40); +} + #ifdef CONFIG_PM static int max98090_runtime_resume(struct device *dev) { @@ -2697,6 +2713,7 @@ static struct i2c_driver max98090_i2c_driver = { }, .probe = max98090_i2c_probe, .remove = max98090_i2c_remove, + .shutdown = max98090_i2c_shutdown, .id_table = max98090_i2c_id, };