ASoC: wm8731: Overhaul of the driver

Merge series from Mark Brown <broonie@kernel.org>:

This series contains a bunch of fairly minor changes which overhaul and
modernise the WM8731 driver, there should be no impact on the driver's
functionality.

Documentation/devicetree/bindings/sound/wlf,wm8731.yaml

+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/wlf,wm8731.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Wolfson Microelectromics WM8731 audio CODEC
+
+maintainers:
+  - patches@opensource.cirrus.com
+
+description: |
+  Wolfson Microelectronics WM8731 audio CODEC
+
+  Pins on the device (for linking into audio routes):
+    * LOUT: Left Channel Line Output
+    * ROUT: Right Channel Line Output
+    * LHPOUT: Left Channel Headphone Output
+    * RHPOUT: Right Channel Headphone Output
+    * LLINEIN: Left Channel Line Input
+    * RLINEIN: Right Channel Line Input
+    * MICIN: Microphone Input
+
+properties:
+  compatible:
+    enum:
+      - wlf,wm8731
+
+  reg:
+    maxItems: 1
+
+  "#sound-dai-cells":
+    const: 0
+
+  clocks:
+    description: Clock provider for MCLK pin.
+    maxItems: 1
+
+  clock-names:
+    items:
+      - const: mclk
+
+  AVDD-supply:
+    description: Analog power supply regulator on the AVDD pin.
+
+  HPVDD-supply:
+    description: Headphone power supply regulator on the HPVDD pin.
+
+  DBVDD-supply:
+    description: Digital buffer supply regulator for the DBVDD pin.
+
+  DCVDD-supply:
+    description: Digital core supply regulator for the DCVDD pin.
+
+  spi-max-frequency: true
+
+additionalProperties: false
+
+required:
+  - reg
+  - compatible
+  - AVDD-supply
+  - HPVDD-supply
+  - DBVDD-supply
+  - DCVDD-supply
+
+examples:
+  - |
+    spi {
+        #address-cells = <1>;
+        #size-cells = <0>;
+        wm8731_i2c: codec@0 {
+            compatible = "wlf,wm8731";
+            reg = <0>;
+            spi-max-frequency = <12500000>;
+
+            AVDD-supply = <&avdd_reg>;
+            HPVDD-supply = <&hpvdd_reg>;
+            DCVDD-supply = <&dcvdd_reg>;
+            DBVDD-supply = <&dbvdd_reg>;
+        };
+    };
+  - |
+
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+        wm8731_spi: codec@1b {
+            compatible = "wlf,wm8731";
+            reg = <0x1b>;
+
+            AVDD-supply = <&avdd_reg>;
+            HPVDD-supply = <&hpvdd_reg>;
+            DCVDD-supply = <&dcvdd_reg>;
+            DBVDD-supply = <&dbvdd_reg>;
+        };
+    };

Documentation/devicetree/bindings/sound/wm8731.txt

-WM8731 audio CODEC
-
-This device supports both I2C and SPI (configured with pin strapping
-on the board).
-
-Required properties:
-
-  - compatible : "wlf,wm8731"
-
-  - reg : the I2C address of the device for I2C, the chip select
-          number for SPI.
-
-Example:
-
-wm8731: codec@1a {
-	compatible = "wlf,wm8731";
-	reg = <0x1a>;
-};
-
-Available audio endpoints for an audio-routing table:
- * LOUT: Left Channel Line Output
- * ROUT: Right Channel Line Output
- * LHPOUT: Left Channel Headphone Output
- * RHPOUT: Right Channel Headphone Output
- * LLINEIN: Left Channel Line Input
- * RLINEIN: Right Channel Line Input
- * MICIN: Microphone Input

arch/arm/configs/multi_v5_defconfig

@@ -211,7 +211,8 @@ CONFIG_SND_ATMEL_SOC_WM8904=m
 CONFIG_SND_AT91_SOC_SAM9X5_WM8731=m
 CONFIG_SND_KIRKWOOD_SOC=y
 CONFIG_SND_SOC_ALC5623=y
-CONFIG_SND_SOC_WM8731=y
+CONFIG_SND_SOC_WM8731_I2C=y
+CONFIG_SND_SOC_WM8731_SPI=y
 CONFIG_SND_SIMPLE_CARD=y
 CONFIG_HID_DRAGONRISE=y
 CONFIG_HID_GYRATION=y

sound/soc/atmel/Kconfig

@@ -42,9 +42,9 @@ config SND_ATMEL_SOC_SSC_DMA
 config SND_AT91_SOC_SAM9G20_WM8731
 	tristate "SoC Audio support for WM8731-based At91sam9g20 evaluation board"
 	depends on ARCH_AT91 || COMPILE_TEST
-	depends on ATMEL_SSC && SND_SOC_I2C_AND_SPI
+	depends on ATMEL_SSC && I2C
 	select SND_ATMEL_SOC_SSC_PDC
-	select SND_SOC_WM8731
+	select SND_SOC_WM8731_I2C
 	help
 	  Say Y if you want to add support for SoC audio on WM8731-based
 	  AT91sam9g20 evaluation board.

sound/soc/au1x/Kconfig

@@ -58,7 +58,7 @@ config SND_SOC_DB1200
 	select SND_SOC_AC97_CODEC
 	select SND_SOC_WM9712
 	select SND_SOC_AU1XPSC_I2S
-	select SND_SOC_WM8731
+	select SND_SOC_WM8731_I2C
 	help
 	  Select this option to enable audio (AC97 and I2S) on the
 	  Alchemy/AMD/RMI/NetLogic Db1200, Db1550 and Db1300 evaluation boards.

sound/soc/codecs/Kconfig

@@ -265,7 +265,8 @@ config SND_SOC_ALL_CODECS
 	imply SND_SOC_WM8711
 	imply SND_SOC_WM8727
 	imply SND_SOC_WM8728
-	imply SND_SOC_WM8731
+	imply SND_SOC_WM8731_I2C
+	imply SND_SOC_WM8731_SPI
 	imply SND_SOC_WM8737
 	imply SND_SOC_WM8741
 	imply SND_SOC_WM8750
@@ -1753,8 +1754,19 @@ config SND_SOC_WM8728
 	depends on SND_SOC_I2C_AND_SPI
 
 config SND_SOC_WM8731
-	tristate "Wolfson Microelectronics WM8731 CODEC"
-	depends on SND_SOC_I2C_AND_SPI
+	tristate
+
+config SND_SOC_WM8731_I2C
+	tristate "Wolfson Microelectronics WM8731 CODEC with I2C"
+	depends on I2C
+	select REGMAP
+	select SND_SOC_WM8731
+
+config SND_SOC_WM8731_SPI
+	tristate "Wolfson Microelectronics WM8731 CODEC with SPI"
+	depends on SPI
+	select REGMAP
+	select SND_SOC_WM8731
 
 config SND_SOC_WM8737
 	tristate "Wolfson Microelectronics WM8737 ADC"

sound/soc/codecs/Makefile

@@ -290,6 +290,8 @@ snd-soc-wm8711-objs := wm8711.o
 snd-soc-wm8727-objs := wm8727.o
 snd-soc-wm8728-objs := wm8728.o
 snd-soc-wm8731-objs := wm8731.o
+snd-soc-wm8731-i2c-objs := wm8731-i2c.o
+snd-soc-wm8731-spi-objs := wm8731-spi.o
 snd-soc-wm8737-objs := wm8737.o
 snd-soc-wm8741-objs := wm8741.o
 snd-soc-wm8750-objs := wm8750.o
@@ -632,6 +634,8 @@ obj-$(CONFIG_SND_SOC_WM8711)	+= snd-soc-wm8711.o
 obj-$(CONFIG_SND_SOC_WM8727)	+= snd-soc-wm8727.o
 obj-$(CONFIG_SND_SOC_WM8728)	+= snd-soc-wm8728.o
 obj-$(CONFIG_SND_SOC_WM8731)	+= snd-soc-wm8731.o
+obj-$(CONFIG_SND_SOC_WM8731_I2C)	+= snd-soc-wm8731-i2c.o
+obj-$(CONFIG_SND_SOC_WM8731_SPI)	+= snd-soc-wm8731-spi.o
 obj-$(CONFIG_SND_SOC_WM8737)	+= snd-soc-wm8737.o
 obj-$(CONFIG_SND_SOC_WM8741)	+= snd-soc-wm8741.o
 obj-$(CONFIG_SND_SOC_WM8750)	+= snd-soc-wm8750.o

sound/soc/codecs/wm8731-i2c.c

+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * wm8731-i2c.c  --  WM8731 ALSA SoC Audio driver I2C code
+ *
+ * Copyright 2005 Openedhand Ltd.
+ * Copyright 2006-12 Wolfson Microelectronics, plc
+ *
+ * Author: Richard Purdie <richard@openedhand.com>
+ *
+ * Based on wm8753.c by Liam Girdwood
+ */
+
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+
+#include "wm8731.h"
+
+
+static const struct of_device_id wm8731_of_match[] = {
+	{ .compatible = "wlf,wm8731", },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, wm8731_of_match);
+
+static int wm8731_i2c_probe(struct i2c_client *i2c,
+			    const struct i2c_device_id *id)
+{
+	struct wm8731_priv *wm8731;
+	int ret;
+
+	wm8731 = devm_kzalloc(&i2c->dev, sizeof(struct wm8731_priv),
+			      GFP_KERNEL);
+	if (wm8731 == NULL)
+		return -ENOMEM;
+
+	i2c_set_clientdata(i2c, wm8731);
+
+	wm8731->regmap = devm_regmap_init_i2c(i2c, &wm8731_regmap);
+	if (IS_ERR(wm8731->regmap)) {
+		ret = PTR_ERR(wm8731->regmap);
+		dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
+			ret);
+		return ret;
+	}
+
+	return wm8731_init(&i2c->dev, wm8731);
+}
+
+static const struct i2c_device_id wm8731_i2c_id[] = {
+	{ "wm8731", 0 },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, wm8731_i2c_id);
+
+static struct i2c_driver wm8731_i2c_driver = {
+	.driver = {
+		.name = "wm8731",
+		.of_match_table = wm8731_of_match,
+	},
+	.probe =    wm8731_i2c_probe,
+	.id_table = wm8731_i2c_id,
+};
+
+module_i2c_driver(wm8731_i2c_driver);
+
+MODULE_DESCRIPTION("ASoC WM8731 driver - I2C");
+MODULE_AUTHOR("Richard Purdie");
+MODULE_LICENSE("GPL");

sound/soc/codecs/wm8731-spi.c

+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * wm8731.c  --  WM8731 ALSA SoC Audio driver
+ *
+ * Copyright 2005 Openedhand Ltd.
+ * Copyright 2006-12 Wolfson Microelectronics, plc
+ *
+ * Author: Richard Purdie <richard@openedhand.com>
+ *
+ * Based on wm8753.c by Liam Girdwood
+ */
+
+#include <linux/spi/spi.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+
+#include "wm8731.h"
+
+static const struct of_device_id wm8731_of_match[] = {
+	{ .compatible = "wlf,wm8731", },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, wm8731_of_match);
+
+static int wm8731_spi_probe(struct spi_device *spi)
+{
+	struct wm8731_priv *wm8731;
+	int ret;
+
+	wm8731 = devm_kzalloc(&spi->dev, sizeof(*wm8731), GFP_KERNEL);
+	if (wm8731 == NULL)
+		return -ENOMEM;
+
+	spi_set_drvdata(spi, wm8731);
+
+	wm8731->regmap = devm_regmap_init_spi(spi, &wm8731_regmap);
+	if (IS_ERR(wm8731->regmap)) {
+		ret = PTR_ERR(wm8731->regmap);
+		dev_err(&spi->dev, "Failed to allocate register map: %d\n",
+			ret);
+		return ret;
+	}
+
+	return wm8731_init(&spi->dev, wm8731);
+}
+
+static struct spi_driver wm8731_spi_driver = {
+	.driver = {
+		.name	= "wm8731",
+		.of_match_table = wm8731_of_match,
+	},
+	.probe		= wm8731_spi_probe,
+};
+
+module_spi_driver(wm8731_spi_driver);
+
+MODULE_DESCRIPTION("ASoC WM8731 driver - SPI");
+MODULE_AUTHOR("Richard Purdie");
+MODULE_LICENSE("GPL");

sound/soc/codecs/wm8731.c

@@ -15,13 +15,9 @@
 #include <linux/init.h>
 #include <linux/delay.h>
 #include <linux/pm.h>
-#include <linux/i2c.h>
 #include <linux/slab.h>
 #include <linux/regmap.h>
 #include <linux/regulator/consumer.h>
-#include <linux/spi/spi.h>
-#include <linux/of_device.h>
-#include <linux/mutex.h>
 #include <linux/clk.h>
 #include <sound/core.h>
 #include <sound/pcm.h>
@@ -32,7 +28,6 @@
 
 #include "wm8731.h"
 
-#define WM8731_NUM_SUPPLIES 4
 static const char *wm8731_supply_names[WM8731_NUM_SUPPLIES] = {
 	"AVDD",
 	"HPVDD",
@@ -40,21 +35,6 @@ static const char *wm8731_supply_names[WM8731_NUM_SUPPLIES] = {
 	"DBVDD",
 };
 
-/* codec private data */
-struct wm8731_priv {
-	struct regmap *regmap;
-	struct clk *mclk;
-	struct regulator_bulk_data supplies[WM8731_NUM_SUPPLIES];
-	const struct snd_pcm_hw_constraint_list *constraints;
-	unsigned int sysclk;
-	int sysclk_type;
-	int playback_fs;
-	bool deemph;
-
-	struct mutex lock;
-};
-
-
 /*
  * wm8731 register cache
  */
@@ -429,12 +409,11 @@ static int wm8731_set_dai_fmt(struct snd_soc_dai *codec_dai,
 	struct snd_soc_component *component = codec_dai->component;
 	u16 iface = 0;
 
-	/* set master/slave audio interface */
-	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
-	case SND_SOC_DAIFMT_CBM_CFM:
+	switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
+	case SND_SOC_DAIFMT_CBP_CFP:
 		iface |= 0x0040;
 		break;
-	case SND_SOC_DAIFMT_CBS_CFS:
+	case SND_SOC_DAIFMT_CBC_CFC:
 		break;
 	default:
 		return -EINVAL;
@@ -570,11 +549,39 @@ static struct snd_soc_dai_driver wm8731_dai = {
 	.symmetric_rate = 1,
 };
 
-static int wm8731_request_supplies(struct device *dev,
-		struct wm8731_priv *wm8731)
+static const struct snd_soc_component_driver soc_component_dev_wm8731 = {
+	.set_bias_level		= wm8731_set_bias_level,
+	.controls		= wm8731_snd_controls,
+	.num_controls		= ARRAY_SIZE(wm8731_snd_controls),
+	.dapm_widgets		= wm8731_dapm_widgets,
+	.num_dapm_widgets	= ARRAY_SIZE(wm8731_dapm_widgets),
+	.dapm_routes		= wm8731_intercon,
+	.num_dapm_routes	= ARRAY_SIZE(wm8731_intercon),
+	.suspend_bias_off	= 1,
+	.idle_bias_on		= 1,
+	.use_pmdown_time	= 1,
+	.endianness		= 1,
+	.non_legacy_dai_naming	= 1,
+};
+
+int wm8731_init(struct device *dev, struct wm8731_priv *wm8731)
 {
 	int ret = 0, i;
 
+	wm8731->mclk = devm_clk_get(dev, "mclk");
+	if (IS_ERR(wm8731->mclk)) {
+		ret = PTR_ERR(wm8731->mclk);
+		if (ret == -ENOENT) {
+			wm8731->mclk = NULL;
+			dev_warn(dev, "Assuming static MCLK\n");
+		} else {
+			dev_err(dev, "Failed to get MCLK: %d\n", ret);
+			return ret;
+		}
+	}
+
+	mutex_init(&wm8731->lock);
+
 	for (i = 0; i < ARRAY_SIZE(wm8731->supplies); i++)
 		wm8731->supplies[i].supply = wm8731_supply_names[i];
 
@@ -592,13 +599,6 @@ static int wm8731_request_supplies(struct device *dev,
 		return ret;
 	}
 
-	return 0;
-}
-
-static int wm8731_hw_init(struct device *dev, struct wm8731_priv *wm8731)
-{
-	int ret = 0;
-
 	ret = wm8731_reset(wm8731->regmap);
 	if (ret < 0) {
 		dev_err(dev, "Failed to issue reset: %d\n", ret);
@@ -619,36 +619,24 @@ static int wm8731_hw_init(struct device *dev, struct wm8731_priv *wm8731)
 
 	regcache_mark_dirty(wm8731->regmap);
 
+	ret = devm_snd_soc_register_component(dev,
+			&soc_component_dev_wm8731, &wm8731_dai, 1);
+	if (ret != 0) {
+		dev_err(dev, "Failed to register CODEC: %d\n", ret);
+		goto err_regulator_enable;
+	}
+
+	return 0;
+
 err_regulator_enable:
 	/* Regulators will be enabled by bias management */
 	regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies);
 
 	return ret;
 }
+EXPORT_SYMBOL_GPL(wm8731_init);
 
-static const struct snd_soc_component_driver soc_component_dev_wm8731 = {
-	.set_bias_level		= wm8731_set_bias_level,
-	.controls		= wm8731_snd_controls,
-	.num_controls		= ARRAY_SIZE(wm8731_snd_controls),
-	.dapm_widgets		= wm8731_dapm_widgets,
-	.num_dapm_widgets	= ARRAY_SIZE(wm8731_dapm_widgets),
-	.dapm_routes		= wm8731_intercon,
-	.num_dapm_routes	= ARRAY_SIZE(wm8731_intercon),
-	.suspend_bias_off	= 1,
-	.idle_bias_on		= 1,
-	.use_pmdown_time	= 1,
-	.endianness		= 1,
-	.non_legacy_dai_naming	= 1,
-};
-
-static const struct of_device_id wm8731_of_match[] = {
-	{ .compatible = "wlf,wm8731", },
-	{ }
-};
-
-MODULE_DEVICE_TABLE(of, wm8731_of_match);
-
-static const struct regmap_config wm8731_regmap = {
+const struct regmap_config wm8731_regmap = {
 	.reg_bits = 7,
 	.val_bits = 9,
 
@@ -659,171 +647,7 @@ static const struct regmap_config wm8731_regmap = {
 	.reg_defaults = wm8731_reg_defaults,
 	.num_reg_defaults = ARRAY_SIZE(wm8731_reg_defaults),
 };
-
-#if defined(CONFIG_SPI_MASTER)
-static int wm8731_spi_probe(struct spi_device *spi)
-{
-	struct wm8731_priv *wm8731;
-	int ret;
-
-	wm8731 = devm_kzalloc(&spi->dev, sizeof(*wm8731), GFP_KERNEL);
-	if (wm8731 == NULL)
-		return -ENOMEM;
-
-	wm8731->mclk = devm_clk_get(&spi->dev, "mclk");
-	if (IS_ERR(wm8731->mclk)) {
-		ret = PTR_ERR(wm8731->mclk);
-		if (ret == -ENOENT) {
-			wm8731->mclk = NULL;
-			dev_warn(&spi->dev, "Assuming static MCLK\n");
-		} else {
-			dev_err(&spi->dev, "Failed to get MCLK: %d\n",
-				ret);
-			return ret;
-		}
-	}
-
-	mutex_init(&wm8731->lock);
-
-	spi_set_drvdata(spi, wm8731);
-
-	ret = wm8731_request_supplies(&spi->dev, wm8731);
-	if (ret != 0)
-		return ret;
-
-	wm8731->regmap = devm_regmap_init_spi(spi, &wm8731_regmap);
-	if (IS_ERR(wm8731->regmap)) {
-		ret = PTR_ERR(wm8731->regmap);
-		dev_err(&spi->dev, "Failed to allocate register map: %d\n",
-			ret);
-		return ret;
-	}
-
-	ret = wm8731_hw_init(&spi->dev, wm8731);
-	if (ret != 0)
-		return ret;
-
-	ret = devm_snd_soc_register_component(&spi->dev,
-			&soc_component_dev_wm8731, &wm8731_dai, 1);
-	if (ret != 0) {
-		dev_err(&spi->dev, "Failed to register CODEC: %d\n", ret);
-		return ret;
-	}
-
-	return 0;
-}
-
-static struct spi_driver wm8731_spi_driver = {
-	.driver = {
-		.name	= "wm8731",
-		.of_match_table = wm8731_of_match,
-	},
-	.probe		= wm8731_spi_probe,
-};
-#endif /* CONFIG_SPI_MASTER */
-
-#if IS_ENABLED(CONFIG_I2C)
-static int wm8731_i2c_probe(struct i2c_client *i2c,
-			    const struct i2c_device_id *id)
-{
-	struct wm8731_priv *wm8731;
-	int ret;
-
-	wm8731 = devm_kzalloc(&i2c->dev, sizeof(struct wm8731_priv),
-			      GFP_KERNEL);
-	if (wm8731 == NULL)
-		return -ENOMEM;
-
-	wm8731->mclk = devm_clk_get(&i2c->dev, "mclk");
-	if (IS_ERR(wm8731->mclk)) {
-		ret = PTR_ERR(wm8731->mclk);
-		if (ret == -ENOENT) {
-			wm8731->mclk = NULL;
-			dev_warn(&i2c->dev, "Assuming static MCLK\n");
-		} else {
-			dev_err(&i2c->dev, "Failed to get MCLK: %d\n",
-				ret);
-			return ret;
-		}
-	}
-
-	mutex_init(&wm8731->lock);
-
-	i2c_set_clientdata(i2c, wm8731);
-
-	ret = wm8731_request_supplies(&i2c->dev, wm8731);
-	if (ret != 0)
-		return ret;
-
-	wm8731->regmap = devm_regmap_init_i2c(i2c, &wm8731_regmap);
-	if (IS_ERR(wm8731->regmap)) {
-		ret = PTR_ERR(wm8731->regmap);
-		dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
-			ret);
-		return ret;
-	}
-
-	ret = wm8731_hw_init(&i2c->dev, wm8731);
-	if (ret != 0)
-		return ret;
-
-	ret = devm_snd_soc_register_component(&i2c->dev,
-			&soc_component_dev_wm8731, &wm8731_dai, 1);
-	if (ret != 0) {
-		dev_err(&i2c->dev, "Failed to register CODEC: %d\n", ret);
-		return ret;
-	}
-
-	return 0;
-}
-
-static const struct i2c_device_id wm8731_i2c_id[] = {
-	{ "wm8731", 0 },
-	{ }
-};
-MODULE_DEVICE_TABLE(i2c, wm8731_i2c_id);
-
-static struct i2c_driver wm8731_i2c_driver = {
-	.driver = {
-		.name = "wm8731",
-		.of_match_table = wm8731_of_match,
-	},
-	.probe =    wm8731_i2c_probe,
-	.id_table = wm8731_i2c_id,
-};
-#endif
-
-static int __init wm8731_modinit(void)
-{
-	int ret = 0;
-#if IS_ENABLED(CONFIG_I2C)
-	ret = i2c_add_driver(&wm8731_i2c_driver);
-	if (ret != 0) {
-		printk(KERN_ERR "Failed to register WM8731 I2C driver: %d\n",
-		       ret);
-	}
-#endif
-#if defined(CONFIG_SPI_MASTER)
-	ret = spi_register_driver(&wm8731_spi_driver);
-	if (ret != 0) {
-		printk(KERN_ERR "Failed to register WM8731 SPI driver: %d\n",
-		       ret);
-	}
-#endif
-	return ret;
-}
-module_init(wm8731_modinit);
-
-static void __exit wm8731_exit(void)
-{
-#if IS_ENABLED(CONFIG_I2C)
-	i2c_del_driver(&wm8731_i2c_driver);
-#endif
-#if defined(CONFIG_SPI_MASTER)
-	spi_unregister_driver(&wm8731_spi_driver);
-#endif
-}
-module_exit(wm8731_exit);
+EXPORT_SYMBOL_GPL(wm8731_regmap);
 
 MODULE_DESCRIPTION("ASoC WM8731 driver");
 MODULE_AUTHOR("Richard Purdie");

sound/soc/codecs/wm8731.h

@@ -12,6 +12,13 @@
 #ifndef _WM8731_H
 #define _WM8731_H
 
+#include <linux/mutex.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+
+struct clk;
+struct snd_pcm_hw_constraint_list;
+
 /* WM8731 register space */
 
 #define WM8731_LINVOL   0x00
@@ -33,4 +40,24 @@
 
 #define WM8731_DAI		0
 
+#define WM8731_NUM_SUPPLIES 4
+
+/* codec private data */
+struct wm8731_priv {
+	struct regmap *regmap;
+	struct clk *mclk;
+	struct regulator_bulk_data supplies[WM8731_NUM_SUPPLIES];
+	const struct snd_pcm_hw_constraint_list *constraints;
+	unsigned int sysclk;
+	int sysclk_type;
+	int playback_fs;
+	bool deemph;
+
+	struct mutex lock;
+};
+
+extern const struct regmap_config wm8731_regmap;
+
+int wm8731_init(struct device *dev, struct wm8731_priv *wm8731);
+
 #endif

sound/soc/pxa/Kconfig

@@ -45,7 +45,7 @@ config SND_PXA2XX_SOC_CORGI
 	tristate "SoC Audio support for Sharp Zaurus SL-C7x0"
 	depends on SND_PXA2XX_SOC && PXA_SHARP_C7xx && I2C
 	select SND_PXA2XX_SOC_I2S
-	select SND_SOC_WM8731
+	select SND_SOC_WM8731_I2C
 	help
 	  Say Y if you want to add support for SoC audio on Sharp
 	  Zaurus SL-C7x0 models (Corgi, Shepherd, Husky).
@@ -71,7 +71,7 @@ config SND_PXA2XX_SOC_POODLE
 	tristate "SoC Audio support for Poodle"
 	depends on SND_PXA2XX_SOC && MACH_POODLE && I2C
 	select SND_PXA2XX_SOC_I2S
-	select SND_SOC_WM8731
+	select SND_SOC_WM8731_I2C
 	help
 	  Say Y if you want to add support for SoC audio on Sharp
 	  Zaurus SL-5600 model (Poodle).