forked from Minki/linux
ASoC: rt1015: check the return value of regmap_read during i2c probe
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> Link: https://lore.kernel.org/r/20201209091308.2823-1-derek.fang@realtek.com Signed-off-by: Mark Brown <broonie@kernel.org>
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@ -1207,8 +1207,13 @@ static int rt1015_i2c_probe(struct i2c_client *i2c,
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rt1015->hw_config = (i2c->addr == 0x29) ? RT1015_HW_29 : RT1015_HW_28;
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regmap_read(rt1015->regmap, RT1015_DEVICE_ID, &val);
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if ((val != RT1015_DEVICE_ID_VAL) && (val != RT1015_DEVICE_ID_VAL2)) {
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ret = regmap_read(rt1015->regmap, RT1015_DEVICE_ID, &val);
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if (ret) {
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dev_err(&i2c->dev,
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"Failed to read device register: %d\n", ret);
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return ret;
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} else if ((val != RT1015_DEVICE_ID_VAL) &&
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(val != RT1015_DEVICE_ID_VAL2)) {
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dev_err(&i2c->dev,
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"Device with ID register %x is not rt1015\n", val);
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return -ENODEV;
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