ASoC: adau1977: remove platform data and move micbias bindings include

The change removes the platform_data include/definition. It only contains
some values for the MICBIAS.
These are moved into 'dt-bindings/sound/adi,adau1977.h' so that they can be
used inside device-trees. When moving then, they need to be converted to
pre-compiler defines, so that the DT compiler can understand them.

The driver then, also needs to include the new
'dt-bindings/sound/adi,adau1977.h' file.

Signed-off-by: Alexandru Ardelean <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Mark Brown <[e-mail]>

include/dt-bindings/sound/adi,adau1977.h

···
+/* SPDX-License-Identifier: GPL-2.0-only */
+#ifndef __DT_BINDINGS_ADI_ADAU1977_H__
+#define __DT_BINDINGS_ADI_ADAU1977_H__
+
+#define ADAU1977_MICBIAS_5V0	0x0
+#define ADAU1977_MICBIAS_5V5	0x1
+#define ADAU1977_MICBIAS_6V0	0x2
+#define ADAU1977_MICBIAS_6V5	0x3
+#define ADAU1977_MICBIAS_7V0	0x4
+#define ADAU1977_MICBIAS_7V5	0x5
+#define ADAU1977_MICBIAS_8V0	0x6
+#define ADAU1977_MICBIAS_8V5	0x7
+#define ADAU1977_MICBIAS_9V0	0x8
+
+#endif /* __DT_BINDINGS_ADI_ADAU1977_H__ */

include/linux/platform_data/adau1977.h

···
-/* SPDX-License-Identifier: GPL-2.0-only */
-/*
- * ADAU1977/ADAU1978/ADAU1979 driver
- *
- * Copyright 2014 Analog Devices Inc.
- *  Author: Lars-Peter Clausen <[e-mail]>
- */
-
-#ifndef __LINUX_PLATFORM_DATA_ADAU1977_H__
-#define __LINUX_PLATFORM_DATA_ADAU1977_H__
-
-/**
- * enum adau1977_micbias - ADAU1977 MICBIAS pin voltage setting
- * @ADAU1977_MICBIAS_5V0: MICBIAS is set to 5.0 V
- * @ADAU1977_MICBIAS_5V5: MICBIAS is set to 5.5 V
- * @ADAU1977_MICBIAS_6V0: MICBIAS is set to 6.0 V
- * @ADAU1977_MICBIAS_6V5: MICBIAS is set to 6.5 V
- * @ADAU1977_MICBIAS_7V0: MICBIAS is set to 7.0 V
- * @ADAU1977_MICBIAS_7V5: MICBIAS is set to 7.5 V
- * @ADAU1977_MICBIAS_8V0: MICBIAS is set to 8.0 V
- * @ADAU1977_MICBIAS_8V5: MICBIAS is set to 8.5 V
- * @ADAU1977_MICBIAS_9V0: MICBIAS is set to 9.0 V
- */
-enum adau1977_micbias {
-	ADAU1977_MICBIAS_5V0 = 0x0,
-	ADAU1977_MICBIAS_5V5 = 0x1,
-	ADAU1977_MICBIAS_6V0 = 0x2,
-	ADAU1977_MICBIAS_6V5 = 0x3,
-	ADAU1977_MICBIAS_7V0 = 0x4,
-	ADAU1977_MICBIAS_7V5 = 0x5,
-	ADAU1977_MICBIAS_8V0 = 0x6,
-	ADAU1977_MICBIAS_8V5 = 0x7,
-	ADAU1977_MICBIAS_9V0 = 0x8,
-};
-
-/**
- * struct adau1977_platform_data - Platform configuration data for the ADAU1977
- * @micbias: Specifies the voltage for the MICBIAS pin
- */
-struct adau1977_platform_data {
-	enum adau1977_micbias micbias;
-};
-
-#endif

sound/soc/codecs/adau1977.c

···
 #include <linux/i2c.h>
 #include <linux/init.h>
 #include <linux/module.h>
-#include <linux/platform_data/adau1977.h>
 #include <linux/regmap.h>
 #include <linux/regulator/consumer.h>
 #include <linux/slab.h>
···
 #include <sound/pcm_params.h>
 #include <sound/soc.h>
 #include <sound/tlv.h>
+
+#include <dt-bindings/sound/adi,adau1977.h>
 
 #include "adau1977.h"
 
···
 
 static int adau1977_setup_micbias(struct adau1977 *adau1977)
 {
-	struct adau1977_platform_data *pdata = adau1977->dev->platform_data;
 	unsigned int micbias;
 
-	if (pdata)
-		micbias = pdata->micbias;
-	else if (device_property_read_u32(adau1977->dev, "adi,micbias",
-					  &micbias))
+	if (device_property_read_u32(adau1977->dev, "adi,micbias", &micbias))
 		micbias = ADAU1977_MICBIAS_8V5;
 
 	if (micbias > ADAU1977_MICBIAS_9V0) {