From 3e57646691d4cb60e2b6295a9bda64ff8d0605c5 Mon Sep 17 00:00:00 2001 From: Anish Kumar Date: Fri, 10 Apr 2015 17:41:36 -0700 Subject: [PATCH] To fix pop noise when shutdown,the pop noise during shutdown is the pmic cutoff power of codec without any notice. Signed-off-by: Anish Kumar --- sound/soc/codecs/max98090.c | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) diff --git a/sound/soc/codecs/max98090.c b/sound/soc/codecs/max98090.c index fc17604..65e28f4 100644 --- a/sound/soc/codecs/max98090.c +++ b/sound/soc/codecs/max98090.c @@ -2349,6 +2349,34 @@ static int max98090_i2c_remove(struct i2c_client *client) return 0; } +static void max98090_i2c_shutdown(struct i2c_client *i2c) +{ + struct max98090_priv *max98090 = dev_get_drvdata(&i2c->dev); + + dev_info(&i2c->dev, "shut down device\n"); + + /* enable zero crossing */ + regmap_write(max98090->regmap, + M98090_REG_LEVEL_CONTROL, M98090_ZDENN_MASK-1); + + /* turn down volume levels for all the outputs */ + regmap_write(max98090->regmap, + M98090_REG_RCV_LOUTL_VOLUME, 0x00); + regmap_write(max98090->regmap, + M98090_REG_LOUTR_VOLUME, 0x00); + regmap_write(max98090->regmap, + M98090_REG_LEFT_SPK_VOLUME, 0x00); + regmap_write(max98090->regmap, + M98090_REG_RIGHT_SPK_VOLUME, 0x00); + regmap_write(max98090->regmap, + M98090_REG_LEFT_HP_VOLUME, 0x00); + regmap_write(max98090->regmap, + M98090_REG_RIGHT_HP_VOLUME, 0x00); + regmap_write(max98090->regmap, + M98090_REG_DEVICE_SHUTDOWN, 0x00); + msleep(40); +} + static int max98090_runtime_resume(struct device *dev) { struct max98090_priv *max98090 = dev_get_drvdata(dev); -- 1.9.3