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authorCaesar Wang <wxt@rock-chips.com>2015-04-08 19:05:56 +0800
committerMark Brown <broonie@kernel.org>2015-04-08 18:08:25 +0100
commitc6b424fee7511407107403d3a7c50e0756ae282e (patch)
tree40710f733280a5b9793486786cd98dfc08f0297d /sound/soc
parentc517d838eb7d07bbe9507871fab3931deccff539 (diff)
downloadlinux-c6b424fee7511407107403d3a7c50e0756ae282e.tar.bz2
ASoC: max98090: add shutdown callback for max98090
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> Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound/soc')
-rw-r--r--sound/soc/codecs/max98090.c17
1 files changed, 17 insertions, 0 deletions
diff --git a/sound/soc/codecs/max98090.c b/sound/soc/codecs/max98090.c
index b112b1c2c394..3e33ef2acf3c 100644
--- a/sound/soc/codecs/max98090.c
+++ b/sound/soc/codecs/max98090.c
@@ -2605,8 +2605,24 @@ err_enable:
return ret;
}
+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);
+}
+
static int max98090_i2c_remove(struct i2c_client *client)
{
+ max98090_i2c_shutdown(client);
snd_soc_unregister_codec(&client->dev);
return 0;
}
@@ -2696,6 +2712,7 @@ static struct i2c_driver max98090_i2c_driver = {
.acpi_match_table = ACPI_PTR(max98090_acpi_match),
},
.probe = max98090_i2c_probe,
+ .shutdown = max98090_i2c_shutdown,
.remove = max98090_i2c_remove,
.id_table = max98090_i2c_id,
};