From: Derek Fang <derek.fang@xxxxxxxxxxx>
In some projects, the device ID register is not read correctly.
This patch helps to verify the issue is caused from i2c host or client.
Signed-off-by: Derek Fang <derek.fang@xxxxxxxxxxx>
diff --git a/sound/soc/codecs/rt1015.c b/sound/soc/codecs/rt1015.c
index ac4c9f43b338..32e6bcf763d1 100644
--- a/sound/soc/codecs/rt1015.c
+++ b/sound/soc/codecs/rt1015.c
@@ -1207,8 +1207,13 @@ static int rt1015_i2c_probe(struct i2c_client *i2c,
rt1015->hw_config = (i2c->addr == 0x29) ? RT1015_HW_29 : RT1015_HW_28;
- regmap_read(rt1015->regmap, RT1015_DEVICE_ID, &val);
- if ((val != RT1015_DEVICE_ID_VAL) && (val != RT1015_DEVICE_ID_VAL2)) {
+ ret = regmap_read(rt1015->regmap, RT1015_DEVICE_ID, &val);
+ if (ret) {
+ dev_err(&i2c->dev,
+ "Failed to read device register: %d\n", ret);
+ return ret;
+ } else if ((val != RT1015_DEVICE_ID_VAL) &&
+ (val != RT1015_DEVICE_ID_VAL2)) {
dev_err(&i2c->dev,
"Device with ID register %x is not rt1015\n", val);
return -ENODEV;
--
2.17.1
