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2023-12-09 b22da3d8526a935aa31e086e63f60ff3246cb61c

 kernel/sound/soc/codecs/adau1977.c
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@@ -1,10 +1,9 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  * ADAU1977/ADAU1978/ADAU1979 driver
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  *
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  * Copyright 2014 Analog Devices Inc.
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  *  Author: Lars-Peter Clausen <lars@metafoo.de>
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- *
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- * Licensed under the GPL-2.
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  */
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 #include <linux/delay.h>
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@@ -885,13 +884,15 @@
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 	struct adau1977_platform_data *pdata = adau1977->dev->platform_data;
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 	unsigned int micbias;
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-	if (pdata) {
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+	if (pdata)
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 		micbias = pdata->micbias;
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-		if (micbias > ADAU1977_MICBIAS_9V0)
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-			return -EINVAL;
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-
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-	} else {
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+	else if (device_property_read_u32(adau1977->dev, "adi,micbias",
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+					  &micbias))
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 		micbias = ADAU1977_MICBIAS_8V5;
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+
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+	if (micbias > ADAU1977_MICBIAS_9V0) {
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+		dev_err(adau1977->dev, "Invalid value for 'adi,micbias'\n");
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+		return -EINVAL;
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 	}
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 	return regmap_update_bits(adau1977->regmap, ADAU1977_REG_MICBIAS,