[PATCH] ASoC: rt1015: check the return value of regmap_read during i2c probe

[PATCH] ASoC: rt1015: check the return value of regmap_read during i2c probe

[derek.fang]

From: Derek Fang <derek.fang@realtek.com>

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@realtek.com>

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

Re: [PATCH] ASoC: rt1015: check the return value of regmap_read during i2c probe

[Mark Brown]

On Wed, 9 Dec 2020 17:13:08 +0800, derek.fang@realtek.com wrote:
> 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.

Applied to

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-next

Thanks!

[1/1] ASoC: rt1015: check the return value of regmap_read during i2c probe
      commit: 397e089bda327a350c1cb29133cb66795339a5d9

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

[PATCH] ASoC: rt1015: check the return value of regmap_read during i2c probe

[derek.fang]

From: "derek.fang" <derek@realtek.com>

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@realtek.com>

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