ASoC: Add max98371 codec driver

Signed-off-by: anish kumar <yesanishhere@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

5 files changed, 531 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/sound/max98371.txt b/Documentation/devicetree/bindings/sound/max98371.txt
new file mode 100644
index 000000000000..6c285235e64b
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/max98371.txt
@@ -0,0 +1,17 @@
+max98371 codec
+
+This device supports I2C mode only.
+
+Required properties:
+
+- compatible : "maxim,max98371"
+- reg : The chip select number on the I2C bus
+
+Example:
+
+&i2c {
+        max98371: max98371@0x31 {
+                compatible = "maxim,max98371";
+                reg = <0x31>;
+        };
+};
diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig
index 649e92a252ae..d764f1329042 100644
--- a/sound/soc/codecs/Kconfig
+++ b/sound/soc/codecs/Kconfig
@@ -79,6 +79,7 @@ config SND_SOC_ALL_CODECS
         select SND_SOC_MAX98090 if I2C
         select SND_SOC_MAX98095 if I2C
         select SND_SOC_MAX98357A if GPIOLIB
+        select SND_SOC_MAX98371 if I2C
         select SND_SOC_MAX9867 if I2C
         select SND_SOC_MAX98925 if I2C
         select SND_SOC_MAX98926 if I2C
@@ -522,6 +523,9 @@ config SND_SOC_MAX98095
 config SND_SOC_MAX98357A
        tristate
 
+config SND_SOC_MAX98371
+       tristate
+
 config SND_SOC_MAX9867
         tristate
 
diff --git a/sound/soc/codecs/Makefile b/sound/soc/codecs/Makefile
index 185a712a7fe7..92ef8719c311 100644
--- a/sound/soc/codecs/Makefile
+++ b/sound/soc/codecs/Makefile
@@ -74,6 +74,7 @@ snd-soc-max98088-objs := max98088.o
 snd-soc-max98090-objs := max98090.o
 snd-soc-max98095-objs := max98095.o
 snd-soc-max98357a-objs := max98357a.o
+snd-soc-max98371-objs := max98371.o
 snd-soc-max9867-objs := max9867.o
 snd-soc-max98925-objs := max98925.o
 snd-soc-max98926-objs := max98926.o
diff --git a/sound/soc/codecs/max98371.c b/sound/soc/codecs/max98371.c
new file mode 100644
index 000000000000..21fae0932137
--- /dev/null
+++ b/sound/soc/codecs/max98371.c
@@ -0,0 +1,442 @@
+/*
+ * max98371.c -- ALSA SoC Stereo MAX98371 driver
+ *
+ * Copyright 2015-16 Maxim Integrated Products
+ *
+ * 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/i2c.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/tlv.h>
+#include "max98371.h"
+
+static const char *const monomix_text[] = {
+        "Left", "Right", "LeftRightDiv2",
+};
+
+static const char *const hpf_cutoff_txt[] = {
+        "Disable", "DC Block", "50Hz",
+        "100Hz", "200Hz", "400Hz", "800Hz",
+};
+
+static SOC_ENUM_SINGLE_DECL(max98371_monomix, MAX98371_MONOMIX_CFG, 0,
+                monomix_text);
+
+static SOC_ENUM_SINGLE_DECL(max98371_hpf_cutoff, MAX98371_HPF, 0,
+                hpf_cutoff_txt);
+
+static const DECLARE_TLV_DB_RANGE(max98371_dht_min_gain,
+        0, 1, TLV_DB_SCALE_ITEM(537, 66, 0),
+        2, 3, TLV_DB_SCALE_ITEM(677, 82, 0),
+        4, 5, TLV_DB_SCALE_ITEM(852, 104, 0),
+        6, 7, TLV_DB_SCALE_ITEM(1072, 131, 0),
+        8, 9, TLV_DB_SCALE_ITEM(1350, 165, 0),
+        10, 11, TLV_DB_SCALE_ITEM(1699, 101, 0),
+);
+
+static const DECLARE_TLV_DB_RANGE(max98371_dht_max_gain,
+        0, 1, TLV_DB_SCALE_ITEM(537, 66, 0),
+        2, 3, TLV_DB_SCALE_ITEM(677, 82, 0),
+        4, 5, TLV_DB_SCALE_ITEM(852, 104, 0),
+        6, 7, TLV_DB_SCALE_ITEM(1072, 131, 0),
+        8, 9, TLV_DB_SCALE_ITEM(1350, 165, 0),
+        10, 11, TLV_DB_SCALE_ITEM(1699, 208, 0),
+);
+
+static const DECLARE_TLV_DB_RANGE(max98371_dht_rot_gain,
+        0, 1, TLV_DB_SCALE_ITEM(-50, -50, 0),
+        2, 6, TLV_DB_SCALE_ITEM(-100, -100, 0),
+        7, 8, TLV_DB_SCALE_ITEM(-800, -200, 0),
+        9, 11, TLV_DB_SCALE_ITEM(-1200, -300, 0),
+        12, 13, TLV_DB_SCALE_ITEM(-2000, -200, 0),
+        14, 15, TLV_DB_SCALE_ITEM(-2500, -500, 0),
+);
+
+static const struct reg_default max98371_reg[] = {
+        { 0x01, 0x00 },
+        { 0x02, 0x00 },
+        { 0x03, 0x00 },
+        { 0x04, 0x00 },
+        { 0x05, 0x00 },
+        { 0x06, 0x00 },
+        { 0x07, 0x00 },
+        { 0x08, 0x00 },
+        { 0x09, 0x00 },
+        { 0x0A, 0x00 },
+        { 0x10, 0x06 },
+        { 0x11, 0x08 },
+        { 0x14, 0x80 },
+        { 0x15, 0x00 },
+        { 0x16, 0x00 },
+        { 0x18, 0x00 },
+        { 0x19, 0x00 },
+        { 0x1C, 0x00 },
+        { 0x1D, 0x00 },
+        { 0x1E, 0x00 },
+        { 0x1F, 0x00 },
+        { 0x20, 0x00 },
+        { 0x21, 0x00 },
+        { 0x22, 0x00 },
+        { 0x23, 0x00 },
+        { 0x24, 0x00 },
+        { 0x25, 0x00 },
+        { 0x26, 0x00 },
+        { 0x27, 0x00 },
+        { 0x28, 0x00 },
+        { 0x29, 0x00 },
+        { 0x2A, 0x00 },
+        { 0x2B, 0x00 },
+        { 0x2C, 0x00 },
+        { 0x2D, 0x00 },
+        { 0x2E, 0x0B },
+        { 0x31, 0x00 },
+        { 0x32, 0x18 },
+        { 0x33, 0x00 },
+        { 0x34, 0x00 },
+        { 0x36, 0x00 },
+        { 0x37, 0x00 },
+        { 0x38, 0x00 },
+        { 0x39, 0x00 },
+        { 0x3A, 0x00 },
+        { 0x3B, 0x00 },
+        { 0x3B, 0x00 },
+        { 0x3C, 0x00 },
+        { 0x3D, 0x00 },
+        { 0x3E, 0x00 },
+        { 0x3F, 0x00 },
+        { 0x40, 0x00 },
+        { 0x41, 0x00 },
+        { 0x42, 0x00 },
+        { 0x43, 0x00 },
+        { 0x4A, 0x00 },
+        { 0x4B, 0x00 },
+        { 0x4C, 0x00 },
+        { 0x4D, 0x00 },
+        { 0x4E, 0x00 },
+        { 0x50, 0x00 },
+        { 0x51, 0x00 },
+        { 0x55, 0x00 },
+        { 0x58, 0x00 },
+        { 0x59, 0x00 },
+        { 0x5C, 0x00 },
+        { 0xFF, 0x43 },
+};
+
+static bool max98371_volatile_register(struct device *dev, unsigned int reg)
+{
+        switch (reg) {
+        case MAX98371_IRQ_CLEAR1:
+        case MAX98371_IRQ_CLEAR2:
+        case MAX98371_IRQ_CLEAR3:
+        case MAX98371_VERSION:
+                return true;
+        default:
+                return false;
+        }
+}
+
+static bool max98371_readable_register(struct device *dev, unsigned int reg)
+{
+        switch (reg) {
+        case MAX98371_SOFT_RESET:
+                return false;
+        default:
+                return true;
+        }
+};
+
+static const DECLARE_TLV_DB_RANGE(max98371_gain_tlv,
+        0, 7, TLV_DB_SCALE_ITEM(0, 50, 0),
+        8, 10, TLV_DB_SCALE_ITEM(400, 100, 0)
+);
+
+static const DECLARE_TLV_DB_RANGE(max98371_noload_gain_tlv,
+        0, 11, TLV_DB_SCALE_ITEM(950, 100, 0),
+);
+
+static const DECLARE_TLV_DB_SCALE(digital_tlv, -6300, 50, 1);
+
+static const struct snd_kcontrol_new max98371_snd_controls[] = {
+        SOC_SINGLE_TLV("Speaker Volume", MAX98371_GAIN,
+                        MAX98371_GAIN_SHIFT, (1<<MAX98371_GAIN_WIDTH)-1, 0,
+                        max98371_gain_tlv),
+        SOC_SINGLE_TLV("Digital Volume", MAX98371_DIGITAL_GAIN, 0,
+                        (1<<MAX98371_DIGITAL_GAIN_WIDTH)-1, 1, digital_tlv),
+        SOC_SINGLE_TLV("Speaker DHT Max Volume", MAX98371_GAIN,
+                        0, (1<<MAX98371_DHT_MAX_WIDTH)-1, 0,
+                        max98371_dht_max_gain),
+        SOC_SINGLE_TLV("Speaker DHT Min Volume", MAX98371_DHT_GAIN,
+                        0, (1<<MAX98371_DHT_GAIN_WIDTH)-1, 0,
+                        max98371_dht_min_gain),
+        SOC_SINGLE_TLV("Speaker DHT Rotation Volume", MAX98371_DHT_GAIN,
+                        0, (1<<MAX98371_DHT_ROT_WIDTH)-1, 0,
+                        max98371_dht_rot_gain),
+        SOC_SINGLE("DHT Attack Step", MAX98371_DHT, MAX98371_DHT_STEP, 3, 0),
+        SOC_SINGLE("DHT Attack Rate", MAX98371_DHT, 0, 7, 0),
+        SOC_ENUM("Monomix Select", max98371_monomix),
+        SOC_ENUM("HPF Cutoff", max98371_hpf_cutoff),
+};
+
+static int max98371_dai_set_fmt(struct snd_soc_dai *codec_dai,
+                unsigned int fmt)
+{
+        struct snd_soc_codec *codec = codec_dai->codec;
+        struct max98371_priv *max98371 = snd_soc_codec_get_drvdata(codec);
+        unsigned int val = 0;
+
+        switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
+        case SND_SOC_DAIFMT_CBS_CFS:
+                break;
+        default:
+                dev_err(codec->dev, "DAI clock mode unsupported");
+                return -EINVAL;
+        }
+
+        switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+        case SND_SOC_DAIFMT_I2S:
+                val |= 0;
+                break;
+        case SND_SOC_DAIFMT_RIGHT_J:
+                val |= MAX98371_DAI_RIGHT;
+                break;
+        case SND_SOC_DAIFMT_LEFT_J:
+                val |= MAX98371_DAI_LEFT;
+                break;
+        default:
+                dev_err(codec->dev, "DAI wrong mode unsupported");
+                return -EINVAL;
+        }
+        regmap_update_bits(max98371->regmap, MAX98371_FMT,
+                        MAX98371_FMT_MODE_MASK, val);
+        return 0;
+}
+
+static int max98371_dai_hw_params(struct snd_pcm_substream *substream,
+                struct snd_pcm_hw_params *params,
+                struct snd_soc_dai *dai)
+{
+        struct snd_soc_codec *codec = dai->codec;
+        struct max98371_priv *max98371 = snd_soc_codec_get_drvdata(codec);
+        int blr_clk_ratio, ch_size, channels = params_channels(params);
+        int rate = params_rate(params);
+
+        switch (params_format(params)) {
+        case SNDRV_PCM_FORMAT_S8:
+                regmap_update_bits(max98371->regmap, MAX98371_FMT,
+                                MAX98371_FMT_MASK, MAX98371_DAI_CHANSZ_16);
+                ch_size = 8;
+                break;
+        case SNDRV_PCM_FORMAT_S16_LE:
+                regmap_update_bits(max98371->regmap, MAX98371_FMT,
+                                MAX98371_FMT_MASK, MAX98371_DAI_CHANSZ_16);
+                ch_size = 16;
+                break;
+        case SNDRV_PCM_FORMAT_S24_LE:
+                regmap_update_bits(max98371->regmap, MAX98371_FMT,
+                                MAX98371_FMT_MASK, MAX98371_DAI_CHANSZ_32);
+                ch_size = 24;
+                break;
+        case SNDRV_PCM_FORMAT_S32_LE:
+                regmap_update_bits(max98371->regmap, MAX98371_FMT,
+                                MAX98371_FMT_MASK, MAX98371_DAI_CHANSZ_32);
+                ch_size = 32;
+                break;
+        default:
+                return -EINVAL;
+        }
+
+        /* BCLK/LRCLK ratio calculation */
+        blr_clk_ratio = channels * ch_size;
+        switch (blr_clk_ratio) {
+        case 32:
+                regmap_update_bits(max98371->regmap,
+                        MAX98371_DAI_CLK,
+                        MAX98371_DAI_BSEL_MASK, MAX98371_DAI_BSEL_32);
+                break;
+        case 48:
+                regmap_update_bits(max98371->regmap,
+                        MAX98371_DAI_CLK,
+                        MAX98371_DAI_BSEL_MASK, MAX98371_DAI_BSEL_48);
+                break;
+        case 64:
+                regmap_update_bits(max98371->regmap,
+                        MAX98371_DAI_CLK,
+                        MAX98371_DAI_BSEL_MASK, MAX98371_DAI_BSEL_64);
+                break;
+        default:
+                return -EINVAL;
+        }
+
+        switch (rate) {
+        case 32000:
+                regmap_update_bits(max98371->regmap,
+                        MAX98371_SPK_SR,
+                        MAX98371_SPK_SR_MASK, MAX98371_SPK_SR_32);
+                break;
+        case 44100:
+                regmap_update_bits(max98371->regmap,
+                        MAX98371_SPK_SR,
+                        MAX98371_SPK_SR_MASK, MAX98371_SPK_SR_44);
+                break;
+        case 48000:
+                regmap_update_bits(max98371->regmap,
+                        MAX98371_SPK_SR,
+                        MAX98371_SPK_SR_MASK, MAX98371_SPK_SR_48);
+                break;
+        case 88200:
+                regmap_update_bits(max98371->regmap,
+                        MAX98371_SPK_SR,
+                        MAX98371_SPK_SR_MASK, MAX98371_SPK_SR_88);
+                break;
+        case 96000:
+                regmap_update_bits(max98371->regmap,
+                        MAX98371_SPK_SR,
+                        MAX98371_SPK_SR_MASK, MAX98371_SPK_SR_96);
+                break;
+        default:
+                return -EINVAL;
+        }
+
+        /* enabling both the RX channels*/
+        regmap_update_bits(max98371->regmap, MAX98371_MONOMIX_SRC,
+                        MAX98371_MONOMIX_SRC_MASK, MONOMIX_RX_0_1);
+        regmap_update_bits(max98371->regmap, MAX98371_DAI_CHANNEL,
+                        MAX98371_CHANNEL_MASK, MAX98371_CHANNEL_MASK);
+        return 0;
+}
+
+static const struct snd_soc_dapm_widget max98371_dapm_widgets[] = {
+        SND_SOC_DAPM_DAC("DAC", NULL, MAX98371_SPK_ENABLE, 0, 0),
+        SND_SOC_DAPM_SUPPLY("Global Enable", MAX98371_GLOBAL_ENABLE,
+                0, 0, NULL, 0),
+        SND_SOC_DAPM_OUTPUT("SPK_OUT"),
+};
+
+static const struct snd_soc_dapm_route max98371_audio_map[] = {
+        {"DAC", NULL, "HiFi Playback"},
+        {"SPK_OUT", NULL, "DAC"},
+        {"SPK_OUT", NULL, "Global Enable"},
+};
+
+#define MAX98371_RATES SNDRV_PCM_RATE_8000_48000
+#define MAX98371_FORMATS (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_BE | \
+                SNDRV_PCM_FMTBIT_S24_BE | SNDRV_PCM_FMTBIT_S32_BE)
+
+static const struct snd_soc_dai_ops max98371_dai_ops = {
+        .set_fmt = max98371_dai_set_fmt,
+        .hw_params = max98371_dai_hw_params,
+};
+
+static struct snd_soc_dai_driver max98371_dai[] = {
+        {
+                .name = "max98371-aif1",
+                .playback = {
+                        .stream_name = "HiFi Playback",
+                        .channels_min = 1,
+                        .channels_max = 2,
+                        .rates = SNDRV_PCM_RATE_8000_48000,
+                        .formats = MAX98371_FORMATS,
+                },
+                .ops = &max98371_dai_ops,
+        }
+};
+
+static const struct snd_soc_codec_driver max98371_codec = {
+        .controls = max98371_snd_controls,
+        .num_controls = ARRAY_SIZE(max98371_snd_controls),
+        .dapm_routes = max98371_audio_map,
+        .num_dapm_routes = ARRAY_SIZE(max98371_audio_map),
+        .dapm_widgets = max98371_dapm_widgets,
+        .num_dapm_widgets = ARRAY_SIZE(max98371_dapm_widgets),
+};
+
+static const struct regmap_config max98371_regmap = {
+        .reg_bits         = 8,
+        .val_bits         = 8,
+        .max_register     = MAX98371_VERSION,
+        .reg_defaults     = max98371_reg,
+        .num_reg_defaults = ARRAY_SIZE(max98371_reg),
+        .volatile_reg     = max98371_volatile_register,
+        .readable_reg     = max98371_readable_register,
+        .cache_type       = REGCACHE_RBTREE,
+};
+
+static int max98371_i2c_probe(struct i2c_client *i2c,
+                const struct i2c_device_id *id)
+{
+        struct max98371_priv *max98371;
+        int ret, reg;
+
+        max98371 = devm_kzalloc(&i2c->dev,
+                        sizeof(*max98371), GFP_KERNEL);
+        if (!max98371)
+                return -ENOMEM;
+
+        i2c_set_clientdata(i2c, max98371);
+        max98371->regmap = devm_regmap_init_i2c(i2c, &max98371_regmap);
+        if (IS_ERR(max98371->regmap)) {
+                ret = PTR_ERR(max98371->regmap);
+                dev_err(&i2c->dev,
+                                "Failed to allocate regmap: %d\n", ret);
+                return ret;
+        }
+
+        ret = regmap_read(max98371->regmap, MAX98371_VERSION, &reg);
+        if (ret < 0) {
+                dev_info(&i2c->dev, "device error %d\n", ret);
+                return ret;
+        }
+        dev_info(&i2c->dev, "device version %x\n", reg);
+
+        ret = snd_soc_register_codec(&i2c->dev, &max98371_codec,
+                        max98371_dai, ARRAY_SIZE(max98371_dai));
+        if (ret < 0) {
+                dev_err(&i2c->dev, "Failed to register codec: %d\n", ret);
+                return ret;
+        }
+        return ret;
+}
+
+static int max98371_i2c_remove(struct i2c_client *client)
+{
+        snd_soc_unregister_codec(&client->dev);
+        return 0;
+}
+
+static const struct i2c_device_id max98371_i2c_id[] = {
+        { "max98371", 0 },
+};
+
+MODULE_DEVICE_TABLE(i2c, max98371_i2c_id);
+
+static const struct of_device_id max98371_of_match[] = {
+        { .compatible = "maxim,max98371", },
+        { }
+};
+MODULE_DEVICE_TABLE(of, max98371_of_match);
+
+static struct i2c_driver max98371_i2c_driver = {
+        .driver = {
+                .name = "max98371",
+                .owner = THIS_MODULE,
+                .pm = NULL,
+                .of_match_table = of_match_ptr(max98371_of_match),
+        },
+        .probe  = max98371_i2c_probe,
+        .remove = max98371_i2c_remove,
+        .id_table = max98371_i2c_id,
+};
+
+module_i2c_driver(max98371_i2c_driver);
+
+MODULE_AUTHOR("anish kumar <yesanishhere@gmail.com>");
+MODULE_DESCRIPTION("ALSA SoC MAX98371 driver");
+MODULE_LICENSE("GPL");
diff --git a/sound/soc/codecs/max98371.h b/sound/soc/codecs/max98371.h
new file mode 100644
index 000000000000..9f6330964d98
--- /dev/null
+++ b/sound/soc/codecs/max98371.h
@@ -0,0 +1,67 @@
+/*
+ * max98371.h -- MAX98371 ALSA SoC Audio driver
+ *
+ * Copyright 2011-2012 Maxim Integrated Products
+ *
+ * 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.
+ */
+
+#ifndef _MAX98371_H
+#define _MAX98371_H
+
+#define MAX98371_IRQ_CLEAR1                     0x01
+#define MAX98371_IRQ_CLEAR2                     0x02
+#define MAX98371_IRQ_CLEAR3                     0x03
+#define MAX98371_DAI_CLK                        0x10
+#define MAX98371_DAI_BSEL_MASK                  0xF
+#define MAX98371_DAI_BSEL_32                    2
+#define MAX98371_DAI_BSEL_48                    3
+#define MAX98371_DAI_BSEL_64                    4
+#define MAX98371_SPK_SR                         0x11
+#define MAX98371_SPK_SR_MASK                    0xF
+#define MAX98371_SPK_SR_32                      6
+#define MAX98371_SPK_SR_44                      7
+#define MAX98371_SPK_SR_48                      8
+#define MAX98371_SPK_SR_88                      10
+#define MAX98371_SPK_SR_96                      11
+#define MAX98371_DAI_CHANNEL                    0x15
+#define MAX98371_CHANNEL_MASK                   0x3
+#define MAX98371_MONOMIX_SRC                    0x18
+#define MAX98371_MONOMIX_CFG                    0x19
+#define MAX98371_HPF                            0x1C
+#define MAX98371_MONOMIX_SRC_MASK               0xFF
+#define MONOMIX_RX_0_1                          ((0x1)<<(4))
+#define M98371_DAI_CHANNEL_I2S                  0x3
+#define MAX98371_DIGITAL_GAIN                   0x2D
+#define MAX98371_DIGITAL_GAIN_WIDTH             0x7
+#define MAX98371_GAIN                           0x2E
+#define MAX98371_GAIN_SHIFT                     0x4
+#define MAX98371_GAIN_WIDTH                     0x4
+#define MAX98371_DHT_MAX_WIDTH                  4
+#define MAX98371_FMT                            0x14
+#define MAX98371_CHANSZ_WIDTH                   6
+#define MAX98371_FMT_MASK                       ((0x3)<<(MAX98371_CHANSZ_WIDTH))
+#define MAX98371_FMT_MODE_MASK                  ((0x7)<<(3))
+#define MAX98371_DAI_LEFT                       ((0x1)<<(3))
+#define MAX98371_DAI_RIGHT                      ((0x2)<<(3))
+#define MAX98371_DAI_CHANSZ_16                  ((1)<<(MAX98371_CHANSZ_WIDTH))
+#define MAX98371_DAI_CHANSZ_24                  ((2)<<(MAX98371_CHANSZ_WIDTH))
+#define MAX98371_DAI_CHANSZ_32                  ((3)<<(MAX98371_CHANSZ_WIDTH))
+#define MAX98371_DHT  0x32
+#define MAX98371_DHT_STEP                       0x3
+#define MAX98371_DHT_GAIN                       0x31
+#define MAX98371_DHT_GAIN_WIDTH                 0x4
+#define MAX98371_DHT_ROT_WIDTH                  0x4
+#define MAX98371_SPK_ENABLE                     0x4A
+#define MAX98371_GLOBAL_ENABLE                  0x50
+#define MAX98371_SOFT_RESET                     0x51
+#define MAX98371_VERSION                        0xFF
+
+
+struct max98371_priv {
+        struct regmap *regmap;
+        struct snd_soc_codec *codec;
+};
+#endif