[alsa-devel] [PATCH 1/5] ASoC: rt5645: Prevent the pop sound of the headphone while rebooting or shutdowning

[Oder Chiou]

Add i2c shutdown function to prevent the pop sound of the headphone while
the system is rebooting or shutdowning

Signed-off-by: Oder Chiou <oder_chiou at realtek.com>
---
 sound/soc/codecs/rt5645.c | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/sound/soc/codecs/rt5645.c b/sound/soc/codecs/rt5645.c
index e5fef8f..4189d5a 100644
--- a/sound/soc/codecs/rt5645.c
+++ b/sound/soc/codecs/rt5645.c
@@ -3490,13 +3490,23 @@ static int rt5645_i2c_remove(struct i2c_client *i2c)
 	return 0;
 }
 
+static void rt5645_i2c_shutdown(struct i2c_client *i2c)
+{
+	struct rt5645_priv *rt5645 = i2c_get_clientdata(i2c);
+
+	regmap_update_bits(rt5645->regmap, RT5645_GEN_CTRL3, 0x0020, 0x0020);
+	regmap_update_bits(rt5645->regmap, RT5645_IN1_CTRL2, 0x1000, 0x1000);
+	regmap_update_bits(rt5645->regmap, RT5645_IN1_CTRL1, 0x0004, 0x0000);
+}
+
 static struct i2c_driver rt5645_i2c_driver = {
 	.driver = {
 		.name = "rt5645",
 		.acpi_match_table = ACPI_PTR(rt5645_acpi_match),
 	},
 	.probe = rt5645_i2c_probe,
-	.remove   = rt5645_i2c_remove,
+	.remove = rt5645_i2c_remove,
+	.shutdown = rt5645_i2c_shutdown,
 	.id_table = rt5645_i2c_id,
 };
 module_i2c_driver(rt5645_i2c_driver);
-- 
1.8.1.1.439.g50a6b54