ASoC: Add initial WM8737 driver

The WM8737 is a low power, flexible stereo ADC designed for portable
applications. This driver supports most of the functionality of the
WM8737, though some features such as the ALC are not yet implemented.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

sound/soc/codecs/Kconfig

@@ -55,6 +55,7 @@ config SND_SOC_ALL_CODECS
 	select SND_SOC_WM8727
 	select SND_SOC_WM8728 if SND_SOC_I2C_AND_SPI
 	select SND_SOC_WM8731 if SND_SOC_I2C_AND_SPI
+	select SND_SOC_WM8737 if SND_SOC_I2C_AND_SPI
 	select SND_SOC_WM8741 if SND_SOC_I2C_AND_SPI
 	select SND_SOC_WM8750 if SND_SOC_I2C_AND_SPI
 	select SND_SOC_WM8753 if SND_SOC_I2C_AND_SPI
@@ -236,6 +237,9 @@ config SND_SOC_WM8728
 config SND_SOC_WM8731
 	tristate
 
+config SND_SOC_WM8737
+	tristate
+
 config SND_SOC_WM8741
 	tristate
 

sound/soc/codecs/Makefile

@@ -39,6 +39,7 @@ 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-wm8737-objs := wm8737.o
 snd-soc-wm8741-objs := wm8741.o
 snd-soc-wm8750-objs := wm8750.o
 snd-soc-wm8753-objs := wm8753.o
@@ -116,6 +117,7 @@ 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-$(CONFIG_SND_SOC_WM8737)	+= snd-soc-wm8737.o
 obj-$(CONFIG_SND_SOC_WM8741)	+= snd-soc-wm8741.o
 obj-$(CONFIG_SND_SOC_WM8750)	+= snd-soc-wm8750.o
 obj-$(CONFIG_SND_SOC_WM8753)	+= snd-soc-wm8753.o

sound/soc/codecs/wm8737.c

@@ -0,0 +1,713 @@
+/*
+ * wm8737.c  --  WM8737 ALSA SoC Audio driver
+ *
+ * Copyright 2010 Wolfson Microelectronics plc
+ *
+ * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/pm.h>
+#include <linux/i2c.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/consumer.h>
+#include <linux/spi/spi.h>
+#include <linux/slab.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/soc-dapm.h>
+#include <sound/initval.h>
+#include <sound/tlv.h>
+
+#include "wm8737.h"
+
+#define WM8737_NUM_SUPPLIES 4
+static const char *wm8737_supply_names[WM8737_NUM_SUPPLIES] = {
+	"DCVDD",
+	"DBVDD",
+	"AVDD",
+	"MVDD",
+};
+
+/* codec private data */
+struct wm8737_priv {
+	enum snd_soc_control_type control_type;
+	struct regulator_bulk_data supplies[WM8737_NUM_SUPPLIES];
+	unsigned int mclk;
+};
+
+static const u16 wm8737_reg[WM8737_REGISTER_COUNT] = {
+	0x00C3,     /* R0  - Left PGA volume */
+	0x00C3,     /* R1  - Right PGA volume */
+	0x0007,     /* R2  - AUDIO path L */
+	0x0007,     /* R3  - AUDIO path R */
+	0x0000,     /* R4  - 3D Enhance */
+	0x0000,     /* R5  - ADC Control */
+	0x0000,     /* R6  - Power Management */
+	0x000A,     /* R7  - Audio Format */
+	0x0000,     /* R8  - Clocking */
+	0x000F,     /* R9  - MIC Preamp Control */
+	0x0003,     /* R10 - Misc Bias Control */
+	0x0000,     /* R11 - Noise Gate */
+	0x007C,     /* R12 - ALC1 */
+	0x0000,     /* R13 - ALC2 */
+	0x0032,     /* R14 - ALC3 */
+};
+
+static int wm8737_reset(struct snd_soc_codec *codec)
+{
+	return snd_soc_write(codec, WM8737_RESET, 0);
+}
+
+static const unsigned int micboost_tlv[] = {
+	TLV_DB_RANGE_HEAD(4),
+	0, 0, TLV_DB_SCALE_ITEM(1300, 0, 0),
+	1, 1, TLV_DB_SCALE_ITEM(1800, 0, 0),
+	2, 2, TLV_DB_SCALE_ITEM(2800, 0, 0),
+	3, 3, TLV_DB_SCALE_ITEM(3300, 0, 0),
+};
+static const DECLARE_TLV_DB_SCALE(pga_tlv, -9750, 50, 1);
+static const DECLARE_TLV_DB_SCALE(adc_tlv, -600, 600, 0);
+static const DECLARE_TLV_DB_SCALE(ng_tlv, -7800, 600, 0);
+
+static const char *micbias_enum_text[] = {
+	"25%",
+	"50%",
+	"75%",
+	"100%",
+};
+
+static const struct soc_enum micbias_enum =
+	SOC_ENUM_SINGLE(WM8737_MIC_PREAMP_CONTROL, 0, 4, micbias_enum_text);
+
+static const char *low_cutoff_text[] = {
+	"Low", "High"
+};
+
+static const struct soc_enum low_3d =
+	SOC_ENUM_SINGLE(WM8737_3D_ENHANCE, 6, 2, low_cutoff_text);
+
+static const char *high_cutoff_text[] = {
+	"High", "Low"
+};
+
+static const struct soc_enum high_3d =
+	SOC_ENUM_SINGLE(WM8737_3D_ENHANCE, 5, 2, high_cutoff_text);
+
+static const struct snd_kcontrol_new wm8737_snd_controls[] = {
+SOC_DOUBLE_R_TLV("Mic Boost Volume", WM8737_AUDIO_PATH_L, WM8737_AUDIO_PATH_R,
+		 6, 3, 0, micboost_tlv),
+SOC_DOUBLE_R("Mic Boost Switch", WM8737_AUDIO_PATH_L, WM8737_AUDIO_PATH_R,
+	     4, 1, 0),
+SOC_DOUBLE("Mic ZC Switch", WM8737_AUDIO_PATH_L, WM8737_AUDIO_PATH_R,
+	   3, 1, 0),
+
+SOC_DOUBLE_R_TLV("Capture Volume", WM8737_LEFT_PGA_VOLUME,
+		 WM8737_RIGHT_PGA_VOLUME, 0, 255, 0, pga_tlv),
+SOC_DOUBLE("Capture ZC Switch", WM8737_AUDIO_PATH_L, WM8737_AUDIO_PATH_R,
+	   2, 1, 0),
+
+SOC_DOUBLE("INPUT1 DC Bias Switch", WM8737_MISC_BIAS_CONTROL, 0, 1, 1, 0),
+
+SOC_ENUM("Mic PGA Bias", micbias_enum),
+SOC_SINGLE("ADC Low Power Switch", WM8737_ADC_CONTROL, 2, 1, 0),
+SOC_SINGLE("High Pass Filter Switch", WM8737_ADC_CONTROL, 0, 1, 1),
+SOC_DOUBLE("Polarity Invert Switch", WM8737_ADC_CONTROL, 5, 6, 1, 0),
+
+SOC_SINGLE("3D Switch", WM8737_3D_ENHANCE, 0, 1, 0),
+SOC_SINGLE("3D Depth", WM8737_3D_ENHANCE, 1, 15, 0),
+SOC_ENUM("3D Low Cut-off", low_3d),
+SOC_ENUM("3D High Cut-off", low_3d),
+SOC_SINGLE_TLV("3D ADC Volume", WM8737_3D_ENHANCE, 7, 1, 1, adc_tlv),
+
+SOC_SINGLE("Noise Gate Switch", WM8737_NOISE_GATE, 0, 1, 0),
+SOC_SINGLE_TLV("Noise Gate Threshold Volume", WM8737_NOISE_GATE, 2, 7, 0,
+	       ng_tlv),
+};
+
+static const char *linsel_text[] = {
+	"LINPUT1", "LINPUT2", "LINPUT3", "LINPUT1 DC",
+};
+
+static const struct soc_enum linsel_enum =
+	SOC_ENUM_SINGLE(WM8737_AUDIO_PATH_L, 7, 4, linsel_text);
+
+static const struct snd_kcontrol_new linsel_mux =
+	SOC_DAPM_ENUM("LINSEL", linsel_enum);
+
+
+static const char *rinsel_text[] = {
+	"RINPUT1", "RINPUT2", "RINPUT3", "RINPUT1 DC",
+};
+
+static const struct soc_enum rinsel_enum =
+	SOC_ENUM_SINGLE(WM8737_AUDIO_PATH_R, 7, 4, rinsel_text);
+
+static const struct snd_kcontrol_new rinsel_mux =
+	SOC_DAPM_ENUM("RINSEL", rinsel_enum);
+
+static const char *bypass_text[] = {
+	"Direct", "Preamp"
+};
+
+static const struct soc_enum lbypass_enum =
+	SOC_ENUM_SINGLE(WM8737_MIC_PREAMP_CONTROL, 2, 2, bypass_text);
+
+static const struct snd_kcontrol_new lbypass_mux =
+	SOC_DAPM_ENUM("Left Bypass", lbypass_enum);
+
+
+static const struct soc_enum rbypass_enum =
+	SOC_ENUM_SINGLE(WM8737_MIC_PREAMP_CONTROL, 3, 2, bypass_text);
+
+static const struct snd_kcontrol_new rbypass_mux =
+	SOC_DAPM_ENUM("Left Bypass", rbypass_enum);
+
+static const struct snd_soc_dapm_widget wm8737_dapm_widgets[] = {
+SND_SOC_DAPM_INPUT("LINPUT1"),
+SND_SOC_DAPM_INPUT("LINPUT2"),
+SND_SOC_DAPM_INPUT("LINPUT3"),
+SND_SOC_DAPM_INPUT("RINPUT1"),
+SND_SOC_DAPM_INPUT("RINPUT2"),
+SND_SOC_DAPM_INPUT("RINPUT3"),
+SND_SOC_DAPM_INPUT("LACIN"),
+SND_SOC_DAPM_INPUT("RACIN"),
+
+SND_SOC_DAPM_MUX("LINSEL", SND_SOC_NOPM, 0, 0, &linsel_mux),
+SND_SOC_DAPM_MUX("RINSEL", SND_SOC_NOPM, 0, 0, &rinsel_mux),
+
+SND_SOC_DAPM_MUX("Left Preamp Mux", SND_SOC_NOPM, 0, 0, &lbypass_mux),
+SND_SOC_DAPM_MUX("Right Preamp Mux", SND_SOC_NOPM, 0, 0, &rbypass_mux),
+
+SND_SOC_DAPM_PGA("PGAL", WM8737_POWER_MANAGEMENT, 5, 0, NULL, 0),
+SND_SOC_DAPM_PGA("PGAR", WM8737_POWER_MANAGEMENT, 4, 0, NULL, 0),
+
+SND_SOC_DAPM_DAC("ADCL", NULL, WM8737_POWER_MANAGEMENT, 3, 0),
+SND_SOC_DAPM_DAC("ADCR", NULL, WM8737_POWER_MANAGEMENT, 2, 0),
+
+SND_SOC_DAPM_AIF_OUT("AIF", "Capture", 0, WM8737_POWER_MANAGEMENT, 6, 0),
+};
+
+static const struct snd_soc_dapm_route intercon[] = {
+	{ "LINSEL", "LINPUT1", "LINPUT1" },
+	{ "LINSEL", "LINPUT2", "LINPUT2" },
+	{ "LINSEL", "LINPUT3", "LINPUT3" },
+	{ "LINSEL", "LINPUT1 DC", "LINPUT1" },
+
+	{ "RINSEL", "RINPUT1", "RINPUT1" },
+	{ "RINSEL", "RINPUT2", "RINPUT2" },
+	{ "RINSEL", "RINPUT3", "RINPUT3" },
+	{ "RINSEL", "RINPUT1 DC", "RINPUT1" },
+
+	{ "Left Preamp Mux", "Preamp", "LINSEL" },
+	{ "Left Preamp Mux", "Direct", "LACIN" },
+
+	{ "Right Preamp Mux", "Preamp", "RINSEL" },
+	{ "Right Preamp Mux", "Direct", "RACIN" },
+
+	{ "PGAL", NULL, "Left Preamp Mux" },
+	{ "PGAR", NULL, "Right Preamp Mux" },
+
+	{ "ADCL", NULL, "PGAL" },
+	{ "ADCR", NULL, "PGAR" },
+
+	{ "AIF", NULL, "ADCL" },
+	{ "AIF", NULL, "ADCR" },
+};
+
+static int wm8737_add_widgets(struct snd_soc_codec *codec)
+{
+	struct snd_soc_dapm_context *dapm = &codec->dapm;
+
+	snd_soc_dapm_new_controls(dapm, wm8737_dapm_widgets,
+				  ARRAY_SIZE(wm8737_dapm_widgets));
+	snd_soc_dapm_add_routes(dapm, intercon, ARRAY_SIZE(intercon));
+
+	return 0;
+}
+
+/* codec mclk clock divider coefficients */
+static const struct {
+	u32 mclk;
+	u32 rate;
+	u8 usb;
+	u8 sr;
+} coeff_div[] = {
+	{ 12288000,  8000, 0,  0x4 },
+	{ 12288000, 12000, 0,  0x8 },
+	{ 12288000, 16000, 0,  0xa },
+	{ 12288000, 24000, 0, 0x1c },
+	{ 12288000, 32000, 0,  0xc },
+	{ 12288000, 48000, 0,    0 },
+	{ 12288000, 96000, 0,  0xe },
+
+	{ 11289600,  8000, 0, 0x14 },
+	{ 11289600, 11025, 0, 0x18 },
+	{ 11289600, 22050, 0, 0x1a },
+	{ 11289600, 44100, 0, 0x10 },
+	{ 11289600, 88200, 0, 0x1e },
+
+	{ 18432000,  8000, 0,  0x5 },
+	{ 18432000, 12000, 0,  0x9 },
+	{ 18432000, 16000, 0,  0xb },
+	{ 18432000, 24000, 0, 0x1b },
+	{ 18432000, 32000, 0,  0xd },
+	{ 18432000, 48000, 0,  0x1 },
+	{ 18432000, 96000, 0, 0x1f },
+
+	{ 16934400,  8000, 0, 0x15 },
+	{ 16934400, 11025, 0, 0x19 },
+	{ 16934400, 22050, 0, 0x1b },
+	{ 16934400, 44100, 0, 0x11 },
+	{ 16934400, 88200, 0, 0x1f },
+
+	{ 12000000,  8000, 1,  0x4 },
+	{ 12000000, 11025, 1, 0x19 },
+	{ 12000000, 12000, 1,  0x8 },
+	{ 12000000, 16000, 1,  0xa },
+	{ 12000000, 22050, 1, 0x1b },
+	{ 12000000, 24000, 1, 0x1c },
+	{ 12000000, 32000, 1,  0xc },
+	{ 12000000, 44100, 1, 0x11 },
+	{ 12000000, 48000, 1,  0x0 },
+	{ 12000000, 88200, 1, 0x1f },
+	{ 12000000, 96000, 1,  0xe },
+};
+
+static int wm8737_hw_params(struct snd_pcm_substream *substream,
+			    struct snd_pcm_hw_params *params,
+			    struct snd_soc_dai *dai)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct snd_soc_codec *codec = rtd->codec;
+	struct wm8737_priv *wm8737 = snd_soc_codec_get_drvdata(codec);
+	int i;
+	u16 clocking = 0;
+	u16 af = 0;
+
+	for (i = 0; i < ARRAY_SIZE(coeff_div); i++) {
+		if (coeff_div[i].rate != params_rate(params))
+			continue;
+
+		if (coeff_div[i].mclk == wm8737->mclk)
+			break;
+
+		if (coeff_div[i].mclk == wm8737->mclk * 2) {
+			clocking |= WM8737_CLKDIV2;
+			break;
+		}
+	}
+
+	if (i == ARRAY_SIZE(coeff_div)) {
+		dev_err(codec->dev, "%dHz MCLK can't support %dHz\n",
+			wm8737->mclk, params_rate(params));
+		return -EINVAL;
+	}
+
+	clocking |= coeff_div[i].usb | (coeff_div[i].sr << WM8737_SR_SHIFT);
+
+	switch (params_format(params)) {
+	case SNDRV_PCM_FORMAT_S16_LE:
+		break;
+	case SNDRV_PCM_FORMAT_S20_3LE:
+		af |= 0x8;
+		break;
+	case SNDRV_PCM_FORMAT_S24_LE:
+		af |= 0x10;
+		break;
+	case SNDRV_PCM_FORMAT_S32_LE:
+		af |= 0x18;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	snd_soc_update_bits(codec, WM8737_AUDIO_FORMAT, WM8737_WL_MASK, af);
+	snd_soc_update_bits(codec, WM8737_CLOCKING,
+			    WM8737_USB_MODE | WM8737_CLKDIV2 | WM8737_SR_MASK,
+			    clocking);
+
+	return 0;
+}
+
+static int wm8737_set_dai_sysclk(struct snd_soc_dai *codec_dai,
+				 int clk_id, unsigned int freq, int dir)
+{
+	struct snd_soc_codec *codec = codec_dai->codec;
+	struct wm8737_priv *wm8737 = snd_soc_codec_get_drvdata(codec);
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(coeff_div); i++) {
+		if (freq == coeff_div[i].mclk ||
+		    freq == coeff_div[i].mclk * 2) {
+			wm8737->mclk = freq;
+			return 0;
+		}
+	}
+
+	dev_err(codec->dev, "MCLK rate %dHz not supported\n", freq);
+
+	return -EINVAL;
+}
+
+
+static int wm8737_set_dai_fmt(struct snd_soc_dai *codec_dai,
+		unsigned int fmt)
+{
+	struct snd_soc_codec *codec = codec_dai->codec;
+	u16 af = 0;
+
+	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
+	case SND_SOC_DAIFMT_CBM_CFM:
+		af |= WM8737_MS;
+		break;
+	case SND_SOC_DAIFMT_CBS_CFS:
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+	case SND_SOC_DAIFMT_I2S:
+		af |= 0x2;
+		break;
+	case SND_SOC_DAIFMT_RIGHT_J:
+		break;
+	case SND_SOC_DAIFMT_LEFT_J:
+		af |= 0x1;
+		break;
+	case SND_SOC_DAIFMT_DSP_A:
+		af |= 0x3;
+		break;
+	case SND_SOC_DAIFMT_DSP_B:
+		af |= 0x13;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
+	case SND_SOC_DAIFMT_NB_NF:
+		break;
+	case SND_SOC_DAIFMT_NB_IF:
+		af |= WM8737_LRP;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	snd_soc_update_bits(codec, WM8737_AUDIO_FORMAT,
+			    WM8737_FORMAT_MASK | WM8737_LRP | WM8737_MS, af);
+
+	return 0;
+}
+
+static int wm8737_set_bias_level(struct snd_soc_codec *codec,
+				 enum snd_soc_bias_level level)
+{
+	struct wm8737_priv *wm8737 = snd_soc_codec_get_drvdata(codec);
+	int ret;
+
+	switch (level) {
+	case SND_SOC_BIAS_ON:
+		break;
+
+	case SND_SOC_BIAS_PREPARE:
+		/* VMID at 2*75k */
+		snd_soc_update_bits(codec, WM8737_MISC_BIAS_CONTROL,
+				    WM8737_VMIDSEL_MASK, 0);
+		break;
+
+	case SND_SOC_BIAS_STANDBY:
+		if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
+			ret = regulator_bulk_enable(ARRAY_SIZE(wm8737->supplies),
+						    wm8737->supplies);
+			if (ret != 0) {
+				dev_err(codec->dev,
+					"Failed to enable supplies: %d\n",
+					ret);
+				return ret;
+			}
+
+			snd_soc_cache_sync(codec);
+
+			/* Fast VMID ramp at 2*2.5k */
+			snd_soc_update_bits(codec, WM8737_MISC_BIAS_CONTROL,
+					    WM8737_VMIDSEL_MASK, 0x4);
+
+			/* Bring VMID up */
+			snd_soc_update_bits(codec, WM8737_POWER_MANAGEMENT,
+					    WM8737_VMID_MASK |
+					    WM8737_VREF_MASK,
+					    WM8737_VMID_MASK |
+					    WM8737_VREF_MASK);
+
+			msleep(500);
+		}
+
+		/* VMID at 2*300k */
+		snd_soc_update_bits(codec, WM8737_MISC_BIAS_CONTROL,
+				    WM8737_VMIDSEL_MASK, 2);
+
+		break;
+
+	case SND_SOC_BIAS_OFF:
+		snd_soc_update_bits(codec, WM8737_POWER_MANAGEMENT,
+				    WM8737_VMID_MASK | WM8737_VREF_MASK, 0);
+
+		regulator_bulk_disable(ARRAY_SIZE(wm8737->supplies),
+				       wm8737->supplies);
+		break;
+	}
+
+	codec->dapm.bias_level = level;
+	return 0;
+}
+
+#define WM8737_RATES SNDRV_PCM_RATE_8000_96000
+
+#define WM8737_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
+			SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
+
+static struct snd_soc_dai_ops wm8737_dai_ops = {
+	.hw_params	= wm8737_hw_params,
+	.set_sysclk	= wm8737_set_dai_sysclk,
+	.set_fmt	= wm8737_set_dai_fmt,
+};
+
+static struct snd_soc_dai_driver wm8737_dai = {
+	.name = "wm8737",
+	.capture = {
+		.stream_name = "Capture",
+		.channels_min = 2,  /* Mono modes not yet supported */
+		.channels_max = 2,
+		.rates = WM8737_RATES,
+		.formats = WM8737_FORMATS,
+	},
+	.ops = &wm8737_dai_ops,
+};
+
+#ifdef CONFIG_PM
+static int wm8737_suspend(struct snd_soc_codec *codec, pm_message_t state)
+{
+	wm8737_set_bias_level(codec, SND_SOC_BIAS_OFF);
+	return 0;
+}
+
+static int wm8737_resume(struct snd_soc_codec *codec)
+{
+	wm8737_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
+	return 0;
+}
+#else
+#define wm8737_suspend NULL
+#define wm8737_resume NULL
+#endif
+
+static int wm8737_probe(struct snd_soc_codec *codec)
+{
+	struct wm8737_priv *wm8737 = snd_soc_codec_get_drvdata(codec);
+	int ret, i;
+
+	codec->hw_write = (hw_write_t)i2c_master_send;
+	ret = snd_soc_codec_set_cache_io(codec, 7, 9, wm8737->control_type);
+	if (ret != 0) {
+		dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
+		return ret;
+	}
+
+	for (i = 0; i < ARRAY_SIZE(wm8737->supplies); i++)
+		wm8737->supplies[i].supply = wm8737_supply_names[i];
+
+	ret = regulator_bulk_get(codec->dev, ARRAY_SIZE(wm8737->supplies),
+				 wm8737->supplies);
+	if (ret != 0) {
+		dev_err(codec->dev, "Failed to request supplies: %d\n", ret);
+		return ret;
+	}
+
+	ret = regulator_bulk_enable(ARRAY_SIZE(wm8737->supplies),
+				    wm8737->supplies);
+	if (ret != 0) {
+		dev_err(codec->dev, "Failed to enable supplies: %d\n", ret);
+		goto err_get;
+	}
+
+	ret = wm8737_reset(codec);
+	if (ret < 0) {
+		dev_err(codec->dev, "Failed to issue reset\n");
+		goto err_enable;
+	}
+
+	snd_soc_update_bits(codec, WM8737_LEFT_PGA_VOLUME, WM8737_LVU,
+			    WM8737_LVU);
+	snd_soc_update_bits(codec, WM8737_RIGHT_PGA_VOLUME, WM8737_RVU,
+			    WM8737_RVU);
+
+	wm8737_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
+
+	/* Bias level configuration will have done an extra enable */
+	regulator_bulk_disable(ARRAY_SIZE(wm8737->supplies), wm8737->supplies);
+
+	snd_soc_add_controls(codec, wm8737_snd_controls,
+			     ARRAY_SIZE(wm8737_snd_controls));
+	wm8737_add_widgets(codec);
+
+	return 0;
+
+err_enable:
+	regulator_bulk_disable(ARRAY_SIZE(wm8737->supplies), wm8737->supplies);
+err_get:
+	regulator_bulk_free(ARRAY_SIZE(wm8737->supplies), wm8737->supplies);
+
+	return ret;
+}
+
+static int wm8737_remove(struct snd_soc_codec *codec)
+{
+	struct wm8737_priv *wm8737 = snd_soc_codec_get_drvdata(codec);
+
+	wm8737_set_bias_level(codec, SND_SOC_BIAS_OFF);
+	regulator_bulk_free(ARRAY_SIZE(wm8737->supplies), wm8737->supplies);
+	return 0;
+}
+
+static struct snd_soc_codec_driver soc_codec_dev_wm8737 = {
+	.probe		= wm8737_probe,
+	.remove		= wm8737_remove,
+	.suspend	= wm8737_suspend,
+	.resume		= wm8737_resume,
+	.set_bias_level = wm8737_set_bias_level,
+
+	.reg_cache_size = WM8737_REGISTER_COUNT - 1, /* Skip reset */
+	.reg_word_size	= sizeof(u16),
+	.reg_cache_default = wm8737_reg,
+};
+
+#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
+static __devinit int wm8737_i2c_probe(struct i2c_client *i2c,
+				      const struct i2c_device_id *id)
+{
+	struct wm8737_priv *wm8737;
+	int ret;
+
+	wm8737 = kzalloc(sizeof(struct wm8737_priv), GFP_KERNEL);
+	if (wm8737 == NULL)
+		return -ENOMEM;
+
+	i2c_set_clientdata(i2c, wm8737);
+	wm8737->control_type = SND_SOC_I2C;
+
+	ret =  snd_soc_register_codec(&i2c->dev,
+				      &soc_codec_dev_wm8737, &wm8737_dai, 1);
+	if (ret < 0)
+		kfree(wm8737);
+	return ret;
+
+}
+
+static __devexit int wm8737_i2c_remove(struct i2c_client *client)
+{
+	snd_soc_unregister_codec(&client->dev);
+	kfree(i2c_get_clientdata(client));
+	return 0;
+}
+
+static const struct i2c_device_id wm8737_i2c_id[] = {
+	{ "wm8737", 0 },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, wm8737_i2c_id);
+
+static struct i2c_driver wm8737_i2c_driver = {
+	.driver = {
+		.name = "wm8737",
+		.owner = THIS_MODULE,
+	},
+	.probe =    wm8737_i2c_probe,
+	.remove =   __devexit_p(wm8737_i2c_remove),
+	.id_table = wm8737_i2c_id,
+};
+#endif
+
+#if defined(CONFIG_SPI_MASTER)
+static int __devinit wm8737_spi_probe(struct spi_device *spi)
+{
+	struct wm8737_priv *wm8737;
+	int ret;
+
+	wm8737 = kzalloc(sizeof(struct wm8737_priv), GFP_KERNEL);
+	if (wm8737 == NULL)
+		return -ENOMEM;
+
+	wm8737->control_type = SND_SOC_SPI;
+	spi_set_drvdata(spi, wm8737);
+
+	ret = snd_soc_register_codec(&spi->dev,
+				     &soc_codec_dev_wm8737, &wm8737_dai, 1);
+	if (ret < 0)
+		kfree(wm8737);
+	return ret;
+}
+
+static int __devexit wm8737_spi_remove(struct spi_device *spi)
+{
+	snd_soc_unregister_codec(&spi->dev);
+	kfree(spi_get_drvdata(spi));
+	return 0;
+}
+
+static struct spi_driver wm8737_spi_driver = {
+	.driver = {
+		.name	= "wm8737",
+		.owner	= THIS_MODULE,
+	},
+	.probe		= wm8737_spi_probe,
+	.remove		= __devexit_p(wm8737_spi_remove),
+};
+#endif /* CONFIG_SPI_MASTER */
+
+static int __init wm8737_modinit(void)
+{
+	int ret;
+#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
+	ret = i2c_add_driver(&wm8737_i2c_driver);
+	if (ret != 0) {
+		printk(KERN_ERR "Failed to register WM8737 I2C driver: %d\n",
+		       ret);
+	}
+#endif
+#if defined(CONFIG_SPI_MASTER)
+	ret = spi_register_driver(&wm8737_spi_driver);
+	if (ret != 0) {
+		printk(KERN_ERR "Failed to register WM8737 SPI driver: %d\n",
+		       ret);
+	}
+#endif
+	return 0;
+}
+module_init(wm8737_modinit);
+
+static void __exit wm8737_exit(void)
+{
+#if defined(CONFIG_SPI_MASTER)
+	spi_unregister_driver(&wm8737_spi_driver);
+#endif
+#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
+	i2c_del_driver(&wm8737_i2c_driver);
+#endif
+}
+module_exit(wm8737_exit);
+
+MODULE_DESCRIPTION("ASoC WM8737 driver");
+MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
+MODULE_LICENSE("GPL");

sound/soc/codecs/wm8737.h

@@ -0,0 +1,322 @@
+#ifndef _WM8737_H
+#define _WM8737_H
+
+/*
+ * wm8737.c  --  WM8523 ALSA SoC Audio driver
+ *
+ * Copyright 2010 Wolfson Microelectronics plc
+ *
+ * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+/*
+ * Register values.
+ */
+#define WM8737_LEFT_PGA_VOLUME                  0x00
+#define WM8737_RIGHT_PGA_VOLUME                 0x01
+#define WM8737_AUDIO_PATH_L                     0x02
+#define WM8737_AUDIO_PATH_R                     0x03
+#define WM8737_3D_ENHANCE                       0x04
+#define WM8737_ADC_CONTROL                      0x05
+#define WM8737_POWER_MANAGEMENT                 0x06
+#define WM8737_AUDIO_FORMAT                     0x07
+#define WM8737_CLOCKING                         0x08
+#define WM8737_MIC_PREAMP_CONTROL               0x09
+#define WM8737_MISC_BIAS_CONTROL                0x0A
+#define WM8737_NOISE_GATE                       0x0B
+#define WM8737_ALC1                             0x0C
+#define WM8737_ALC2                             0x0D
+#define WM8737_ALC3                             0x0E
+#define WM8737_RESET                            0x0F
+
+#define WM8737_REGISTER_COUNT                   16
+#define WM8737_MAX_REGISTER                     0x0F
+
+/*
+ * Field Definitions.
+ */
+
+/*
+ * R0 (0x00) - Left PGA volume
+ */
+#define WM8737_LVU                              0x0100  /* LVU */
+#define WM8737_LVU_MASK                         0x0100  /* LVU */
+#define WM8737_LVU_SHIFT                             8  /* LVU */
+#define WM8737_LVU_WIDTH                             1  /* LVU */
+#define WM8737_LINVOL_MASK                      0x00FF  /* LINVOL - [7:0] */
+#define WM8737_LINVOL_SHIFT                          0  /* LINVOL - [7:0] */
+#define WM8737_LINVOL_WIDTH                          8  /* LINVOL - [7:0] */
+
+/*
+ * R1 (0x01) - Right PGA volume
+ */
+#define WM8737_RVU                              0x0100  /* RVU */
+#define WM8737_RVU_MASK                         0x0100  /* RVU */
+#define WM8737_RVU_SHIFT                             8  /* RVU */
+#define WM8737_RVU_WIDTH                             1  /* RVU */
+#define WM8737_RINVOL_MASK                      0x00FF  /* RINVOL - [7:0] */
+#define WM8737_RINVOL_SHIFT                          0  /* RINVOL - [7:0] */
+#define WM8737_RINVOL_WIDTH                          8  /* RINVOL - [7:0] */
+
+/*
+ * R2 (0x02) - AUDIO path L
+ */
+#define WM8737_LINSEL_MASK                      0x0180  /* LINSEL - [8:7] */
+#define WM8737_LINSEL_SHIFT                          7  /* LINSEL - [8:7] */
+#define WM8737_LINSEL_WIDTH                          2  /* LINSEL - [8:7] */
+#define WM8737_LMICBOOST_MASK                   0x0060  /* LMICBOOST - [6:5] */
+#define WM8737_LMICBOOST_SHIFT                       5  /* LMICBOOST - [6:5] */
+#define WM8737_LMICBOOST_WIDTH                       2  /* LMICBOOST - [6:5] */
+#define WM8737_LMBE                             0x0010  /* LMBE */
+#define WM8737_LMBE_MASK                        0x0010  /* LMBE */
+#define WM8737_LMBE_SHIFT                            4  /* LMBE */
+#define WM8737_LMBE_WIDTH                            1  /* LMBE */
+#define WM8737_LMZC                             0x0008  /* LMZC */
+#define WM8737_LMZC_MASK                        0x0008  /* LMZC */
+#define WM8737_LMZC_SHIFT                            3  /* LMZC */
+#define WM8737_LMZC_WIDTH                            1  /* LMZC */
+#define WM8737_LPZC                             0x0004  /* LPZC */
+#define WM8737_LPZC_MASK                        0x0004  /* LPZC */
+#define WM8737_LPZC_SHIFT                            2  /* LPZC */
+#define WM8737_LPZC_WIDTH                            1  /* LPZC */
+#define WM8737_LZCTO_MASK                       0x0003  /* LZCTO - [1:0] */
+#define WM8737_LZCTO_SHIFT                           0  /* LZCTO - [1:0] */
+#define WM8737_LZCTO_WIDTH                           2  /* LZCTO - [1:0] */
+
+/*
+ * R3 (0x03) - AUDIO path R
+ */
+#define WM8737_RINSEL_MASK                      0x0180  /* RINSEL - [8:7] */
+#define WM8737_RINSEL_SHIFT                          7  /* RINSEL - [8:7] */
+#define WM8737_RINSEL_WIDTH                          2  /* RINSEL - [8:7] */
+#define WM8737_RMICBOOST_MASK                   0x0060  /* RMICBOOST - [6:5] */
+#define WM8737_RMICBOOST_SHIFT                       5  /* RMICBOOST - [6:5] */
+#define WM8737_RMICBOOST_WIDTH                       2  /* RMICBOOST - [6:5] */
+#define WM8737_RMBE                             0x0010  /* RMBE */
+#define WM8737_RMBE_MASK                        0x0010  /* RMBE */
+#define WM8737_RMBE_SHIFT                            4  /* RMBE */
+#define WM8737_RMBE_WIDTH                            1  /* RMBE */
+#define WM8737_RMZC                             0x0008  /* RMZC */
+#define WM8737_RMZC_MASK                        0x0008  /* RMZC */
+#define WM8737_RMZC_SHIFT                            3  /* RMZC */
+#define WM8737_RMZC_WIDTH                            1  /* RMZC */
+#define WM8737_RPZC                             0x0004  /* RPZC */
+#define WM8737_RPZC_MASK                        0x0004  /* RPZC */
+#define WM8737_RPZC_SHIFT                            2  /* RPZC */
+#define WM8737_RPZC_WIDTH                            1  /* RPZC */
+#define WM8737_RZCTO_MASK                       0x0003  /* RZCTO - [1:0] */
+#define WM8737_RZCTO_SHIFT                           0  /* RZCTO - [1:0] */
+#define WM8737_RZCTO_WIDTH                           2  /* RZCTO - [1:0] */
+
+/*
+ * R4 (0x04) - 3D Enhance
+ */
+#define WM8737_DIV2                             0x0080  /* DIV2 */
+#define WM8737_DIV2_MASK                        0x0080  /* DIV2 */
+#define WM8737_DIV2_SHIFT                            7  /* DIV2 */
+#define WM8737_DIV2_WIDTH                            1  /* DIV2 */
+#define WM8737_3DLC                             0x0040  /* 3DLC */
+#define WM8737_3DLC_MASK                        0x0040  /* 3DLC */
+#define WM8737_3DLC_SHIFT                            6  /* 3DLC */
+#define WM8737_3DLC_WIDTH                            1  /* 3DLC */
+#define WM8737_3DUC                             0x0020  /* 3DUC */
+#define WM8737_3DUC_MASK                        0x0020  /* 3DUC */
+#define WM8737_3DUC_SHIFT                            5  /* 3DUC */
+#define WM8737_3DUC_WIDTH                            1  /* 3DUC */
+#define WM8737_3DDEPTH_MASK                     0x001E  /* 3DDEPTH - [4:1] */
+#define WM8737_3DDEPTH_SHIFT                         1  /* 3DDEPTH - [4:1] */
+#define WM8737_3DDEPTH_WIDTH                         4  /* 3DDEPTH - [4:1] */
+#define WM8737_3DE                              0x0001  /* 3DE */
+#define WM8737_3DE_MASK                         0x0001  /* 3DE */
+#define WM8737_3DE_SHIFT                             0  /* 3DE */
+#define WM8737_3DE_WIDTH                             1  /* 3DE */
+
+/*
+ * R5 (0x05) - ADC Control
+ */
+#define WM8737_MONOMIX_MASK                     0x0180  /* MONOMIX - [8:7] */
+#define WM8737_MONOMIX_SHIFT                         7  /* MONOMIX - [8:7] */
+#define WM8737_MONOMIX_WIDTH                         2  /* MONOMIX - [8:7] */
+#define WM8737_POLARITY_MASK                    0x0060  /* POLARITY - [6:5] */
+#define WM8737_POLARITY_SHIFT                        5  /* POLARITY - [6:5] */
+#define WM8737_POLARITY_WIDTH                        2  /* POLARITY - [6:5] */
+#define WM8737_HPOR                             0x0010  /* HPOR */
+#define WM8737_HPOR_MASK                        0x0010  /* HPOR */
+#define WM8737_HPOR_SHIFT                            4  /* HPOR */
+#define WM8737_HPOR_WIDTH                            1  /* HPOR */
+#define WM8737_LP                               0x0004  /* LP */
+#define WM8737_LP_MASK                          0x0004  /* LP */
+#define WM8737_LP_SHIFT                              2  /* LP */
+#define WM8737_LP_WIDTH                              1  /* LP */
+#define WM8737_MONOUT                           0x0002  /* MONOUT */
+#define WM8737_MONOUT_MASK                      0x0002  /* MONOUT */
+#define WM8737_MONOUT_SHIFT                          1  /* MONOUT */
+#define WM8737_MONOUT_WIDTH                          1  /* MONOUT */
+#define WM8737_ADCHPD                           0x0001  /* ADCHPD */
+#define WM8737_ADCHPD_MASK                      0x0001  /* ADCHPD */
+#define WM8737_ADCHPD_SHIFT                          0  /* ADCHPD */
+#define WM8737_ADCHPD_WIDTH                          1  /* ADCHPD */
+
+/*
+ * R6 (0x06) - Power Management
+ */
+#define WM8737_VMID                             0x0100  /* VMID */
+#define WM8737_VMID_MASK                        0x0100  /* VMID */
+#define WM8737_VMID_SHIFT                            8  /* VMID */
+#define WM8737_VMID_WIDTH                            1  /* VMID */
+#define WM8737_VREF                             0x0080  /* VREF */
+#define WM8737_VREF_MASK                        0x0080  /* VREF */
+#define WM8737_VREF_SHIFT                            7  /* VREF */
+#define WM8737_VREF_WIDTH                            1  /* VREF */
+#define WM8737_AI                               0x0040  /* AI */
+#define WM8737_AI_MASK                          0x0040  /* AI */
+#define WM8737_AI_SHIFT                              6  /* AI */
+#define WM8737_AI_WIDTH                              1  /* AI */
+#define WM8737_PGL                              0x0020  /* PGL */
+#define WM8737_PGL_MASK                         0x0020  /* PGL */
+#define WM8737_PGL_SHIFT                             5  /* PGL */
+#define WM8737_PGL_WIDTH                             1  /* PGL */
+#define WM8737_PGR                              0x0010  /* PGR */
+#define WM8737_PGR_MASK                         0x0010  /* PGR */
+#define WM8737_PGR_SHIFT                             4  /* PGR */
+#define WM8737_PGR_WIDTH                             1  /* PGR */
+#define WM8737_ADL                              0x0008  /* ADL */
+#define WM8737_ADL_MASK                         0x0008  /* ADL */
+#define WM8737_ADL_SHIFT                             3  /* ADL */
+#define WM8737_ADL_WIDTH                             1  /* ADL */
+#define WM8737_ADR                              0x0004  /* ADR */
+#define WM8737_ADR_MASK                         0x0004  /* ADR */
+#define WM8737_ADR_SHIFT                             2  /* ADR */
+#define WM8737_ADR_WIDTH                             1  /* ADR */
+#define WM8737_MICBIAS_MASK                     0x0003  /* MICBIAS - [1:0] */
+#define WM8737_MICBIAS_SHIFT                         0  /* MICBIAS - [1:0] */
+#define WM8737_MICBIAS_WIDTH                         2  /* MICBIAS - [1:0] */
+
+/*
+ * R7 (0x07) - Audio Format
+ */
+#define WM8737_SDODIS                           0x0080  /* SDODIS */
+#define WM8737_SDODIS_MASK                      0x0080  /* SDODIS */
+#define WM8737_SDODIS_SHIFT                          7  /* SDODIS */
+#define WM8737_SDODIS_WIDTH                          1  /* SDODIS */
+#define WM8737_MS                               0x0040  /* MS */
+#define WM8737_MS_MASK                          0x0040  /* MS */
+#define WM8737_MS_SHIFT                              6  /* MS */
+#define WM8737_MS_WIDTH                              1  /* MS */
+#define WM8737_LRP                              0x0010  /* LRP */
+#define WM8737_LRP_MASK                         0x0010  /* LRP */
+#define WM8737_LRP_SHIFT                             4  /* LRP */
+#define WM8737_LRP_WIDTH                             1  /* LRP */
+#define WM8737_WL_MASK                          0x000C  /* WL - [3:2] */
+#define WM8737_WL_SHIFT                              2  /* WL - [3:2] */
+#define WM8737_WL_WIDTH                              2  /* WL - [3:2] */
+#define WM8737_FORMAT_MASK                      0x0003  /* FORMAT - [1:0] */
+#define WM8737_FORMAT_SHIFT                          0  /* FORMAT - [1:0] */
+#define WM8737_FORMAT_WIDTH                          2  /* FORMAT - [1:0] */
+
+/*
+ * R8 (0x08) - Clocking
+ */
+#define WM8737_AUTODETECT                       0x0080  /* AUTODETECT */
+#define WM8737_AUTODETECT_MASK                  0x0080  /* AUTODETECT */
+#define WM8737_AUTODETECT_SHIFT                      7  /* AUTODETECT */
+#define WM8737_AUTODETECT_WIDTH                      1  /* AUTODETECT */
+#define WM8737_CLKDIV2                          0x0040  /* CLKDIV2 */
+#define WM8737_CLKDIV2_MASK                     0x0040  /* CLKDIV2 */
+#define WM8737_CLKDIV2_SHIFT                         6  /* CLKDIV2 */
+#define WM8737_CLKDIV2_WIDTH                         1  /* CLKDIV2 */
+#define WM8737_SR_MASK                          0x003E  /* SR - [5:1] */
+#define WM8737_SR_SHIFT                              1  /* SR - [5:1] */
+#define WM8737_SR_WIDTH                              5  /* SR - [5:1] */
+#define WM8737_USB_MODE                         0x0001  /* USB MODE */
+#define WM8737_USB_MODE_MASK                    0x0001  /* USB MODE */
+#define WM8737_USB_MODE_SHIFT                        0  /* USB MODE */
+#define WM8737_USB_MODE_WIDTH                        1  /* USB MODE */
+
+/*
+ * R9 (0x09) - MIC Preamp Control
+ */
+#define WM8737_RBYPEN                           0x0008  /* RBYPEN */
+#define WM8737_RBYPEN_MASK                      0x0008  /* RBYPEN */
+#define WM8737_RBYPEN_SHIFT                          3  /* RBYPEN */
+#define WM8737_RBYPEN_WIDTH                          1  /* RBYPEN */
+#define WM8737_LBYPEN                           0x0004  /* LBYPEN */
+#define WM8737_LBYPEN_MASK                      0x0004  /* LBYPEN */
+#define WM8737_LBYPEN_SHIFT                          2  /* LBYPEN */
+#define WM8737_LBYPEN_WIDTH                          1  /* LBYPEN */
+#define WM8737_MBCTRL_MASK                      0x0003  /* MBCTRL - [1:0] */
+#define WM8737_MBCTRL_SHIFT                          0  /* MBCTRL - [1:0] */
+#define WM8737_MBCTRL_WIDTH                          2  /* MBCTRL - [1:0] */
+
+/*
+ * R10 (0x0A) - Misc Bias Control
+ */
+#define WM8737_VMIDSEL_MASK                     0x000C  /* VMIDSEL - [3:2] */
+#define WM8737_VMIDSEL_SHIFT                         2  /* VMIDSEL - [3:2] */
+#define WM8737_VMIDSEL_WIDTH                         2  /* VMIDSEL - [3:2] */
+#define WM8737_LINPUT1_DC_BIAS_ENABLE           0x0002  /* LINPUT1 DC BIAS ENABLE */
+#define WM8737_LINPUT1_DC_BIAS_ENABLE_MASK      0x0002  /* LINPUT1 DC BIAS ENABLE */
+#define WM8737_LINPUT1_DC_BIAS_ENABLE_SHIFT          1  /* LINPUT1 DC BIAS ENABLE */
+#define WM8737_LINPUT1_DC_BIAS_ENABLE_WIDTH          1  /* LINPUT1 DC BIAS ENABLE */
+#define WM8737_RINPUT1_DC_BIAS_ENABLE           0x0001  /* RINPUT1 DC BIAS ENABLE */
+#define WM8737_RINPUT1_DC_BIAS_ENABLE_MASK      0x0001  /* RINPUT1 DC BIAS ENABLE */
+#define WM8737_RINPUT1_DC_BIAS_ENABLE_SHIFT          0  /* RINPUT1 DC BIAS ENABLE */
+#define WM8737_RINPUT1_DC_BIAS_ENABLE_WIDTH          1  /* RINPUT1 DC BIAS ENABLE */
+
+/*
+ * R11 (0x0B) - Noise Gate
+ */
+#define WM8737_NGTH_MASK                        0x001C  /* NGTH - [4:2] */
+#define WM8737_NGTH_SHIFT                            2  /* NGTH - [4:2] */
+#define WM8737_NGTH_WIDTH                            3  /* NGTH - [4:2] */
+#define WM8737_NGAT                             0x0001  /* NGAT */
+#define WM8737_NGAT_MASK                        0x0001  /* NGAT */
+#define WM8737_NGAT_SHIFT                            0  /* NGAT */
+#define WM8737_NGAT_WIDTH                            1  /* NGAT */
+
+/*
+ * R12 (0x0C) - ALC1
+ */
+#define WM8737_ALCSEL_MASK                      0x0180  /* ALCSEL - [8:7] */
+#define WM8737_ALCSEL_SHIFT                          7  /* ALCSEL - [8:7] */
+#define WM8737_ALCSEL_WIDTH                          2  /* ALCSEL - [8:7] */
+#define WM8737_MAX_GAIN_MASK                    0x0070  /* MAX GAIN - [6:4] */
+#define WM8737_MAX_GAIN_SHIFT                        4  /* MAX GAIN - [6:4] */
+#define WM8737_MAX_GAIN_WIDTH                        3  /* MAX GAIN - [6:4] */
+#define WM8737_ALCL_MASK                        0x000F  /* ALCL - [3:0] */
+#define WM8737_ALCL_SHIFT                            0  /* ALCL - [3:0] */
+#define WM8737_ALCL_WIDTH                            4  /* ALCL - [3:0] */
+
+/*
+ * R13 (0x0D) - ALC2
+ */
+#define WM8737_ALCZCE                           0x0010  /* ALCZCE */
+#define WM8737_ALCZCE_MASK                      0x0010  /* ALCZCE */
+#define WM8737_ALCZCE_SHIFT                          4  /* ALCZCE */
+#define WM8737_ALCZCE_WIDTH                          1  /* ALCZCE */
+#define WM8737_HLD_MASK                         0x000F  /* HLD - [3:0] */
+#define WM8737_HLD_SHIFT                             0  /* HLD - [3:0] */
+#define WM8737_HLD_WIDTH                             4  /* HLD - [3:0] */
+
+/*
+ * R14 (0x0E) - ALC3
+ */
+#define WM8737_DCY_MASK                         0x00F0  /* DCY - [7:4] */
+#define WM8737_DCY_SHIFT                             4  /* DCY - [7:4] */
+#define WM8737_DCY_WIDTH                             4  /* DCY - [7:4] */
+#define WM8737_ATK_MASK                         0x000F  /* ATK - [3:0] */
+#define WM8737_ATK_SHIFT                             0  /* ATK - [3:0] */
+#define WM8737_ATK_WIDTH                             4  /* ATK - [3:0] */
+
+/*
+ * R15 (0x0F) - Reset
+ */
+#define WM8737_RESET_MASK                       0x01FF  /* RESET - [8:0] */
+#define WM8737_RESET_SHIFT                           0  /* RESET - [8:0] */
+#define WM8737_RESET_WIDTH                           9  /* RESET - [8:0] */
+
+#endif