ASoC: Add max9867 codec driver

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

5 files changed, 642 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/sound/max9867.txt b/Documentation/devicetree/bindings/sound/max9867.txt
new file mode 100644
index 000000000000..394cd4eb17ec
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/max9867.txt
@@ -0,0 +1,17 @@
+max9867 codec
+
+This device supports I2C mode only.
+
+Required properties:
+
+- compatible : "maxim,max9867"
+- reg : The chip select number on the I2C bus
+
+Example:
+
+&i2c {
+        max9867: max9867@0x18 {
+                compatible = "maxim,max9867";
+                reg = <0x18>;
+        };
+};
diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig
index ebaaa51823ef..f55a846efe54 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_MAX9867 if I2C
         select SND_SOC_MAX98925 if I2C
         select SND_SOC_MAX98926 if I2C
         select SND_SOC_MAX9850 if I2C
@@ -517,6 +518,9 @@ config SND_SOC_MAX98095
 config SND_SOC_MAX98357A
        tristate
 
+config SND_SOC_MAX9867
+        tristate
+
 config SND_SOC_MAX98925
        tristate
 
diff --git a/sound/soc/codecs/Makefile b/sound/soc/codecs/Makefile
index 16c014a46ae8..b84fe9d75dfd 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-max9867-objs := max9867.o
 snd-soc-max98925-objs := max98925.o
 snd-soc-max98926-objs := max98926.o
 snd-soc-max9850-objs := max9850.o
diff --git a/sound/soc/codecs/max9867.c b/sound/soc/codecs/max9867.c
new file mode 100755
index 000000000000..b9d989f25515
--- /dev/null
+++ b/sound/soc/codecs/max9867.c
@@ -0,0 +1,537 @@
+/*
+ * max9867.c -- max9867 ALSA SoC Audio driver
+ *
+ * Copyright 2013-15 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/delay.h>
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/tlv.h>
+#include "max9867.h"
+
+static const char *const max9867_spmode[] = {
+        "Stereo Diff", "Mono Diff",
+        "Stereo Cap", "Mono Cap",
+        "Stereo Single", "Mono Single",
+        "Stereo Single Fast", "Mono Single Fast"
+};
+static const char *const max9867_sidetone_text[] = {
+        "None", "Left", "Right", "LeftRight", "LeftRightDiv2",
+};
+static const char *const max9867_filter_text[] = {"IIR", "FIR"};
+
+static SOC_ENUM_SINGLE_DECL(max9867_filter, MAX9867_CODECFLTR, 7,
+        max9867_filter_text);
+static SOC_ENUM_SINGLE_DECL(max9867_spkmode, MAX9867_MODECONFIG, 0,
+        max9867_spmode);
+static SOC_ENUM_SINGLE_DECL(max9867_sidetone, MAX9867_DACGAIN, 6,
+        max9867_sidetone_text);
+static DECLARE_TLV_DB_SCALE(max9860_capture_tlv, -600, 200, 0);
+static DECLARE_TLV_DB_SCALE(max9860_mic_tlv, 2000, 100, 1);
+static DECLARE_TLV_DB_SCALE(max9860_adc_left_tlv, -1200, 100, 1);
+static DECLARE_TLV_DB_SCALE(max9860_adc_right_tlv, -1200, 100, 1);
+static const unsigned int max98088_micboost_tlv[] = {
+        TLV_DB_RANGE_HEAD(2),
+        0, 1, TLV_DB_SCALE_ITEM(0, 2000, 0),
+        2, 2, TLV_DB_SCALE_ITEM(3000, 0, 0),
+};
+
+static const struct snd_kcontrol_new max9867_snd_controls[] = {
+        SOC_DOUBLE_R("Master Playback Volume", MAX9867_LEFTVOL,
+                                MAX9867_RIGHTVOL, 0, 63, 1),
+        SOC_DOUBLE_R_TLV("Capture Volume", MAX9867_LEFTMICGAIN,
+                        MAX9867_RIGHTMICGAIN,
+                        0, 15, 1, max9860_capture_tlv),
+        SOC_DOUBLE_R_TLV("Mic Volume", MAX9867_LEFTMICGAIN,
+                        MAX9867_RIGHTMICGAIN, 0, 31, 1, max9860_mic_tlv),
+        SOC_DOUBLE_R_TLV("Mic Boost Volume", MAX9867_LEFTMICGAIN,
+                        MAX9867_RIGHTMICGAIN, 5, 3, 0, max98088_micboost_tlv),
+        SOC_ENUM("Digital Sidetone Src", max9867_sidetone),
+        SOC_SINGLE("Sidetone Volume", MAX9867_DACGAIN, 0, 31, 1),
+        SOC_SINGLE("DAC Volume", MAX9867_DACLEVEL, 4, 3, 0),
+        SOC_SINGLE("DAC Attenuation", MAX9867_DACLEVEL, 0, 15, 1),
+        SOC_SINGLE_TLV("ADC Left Volume", MAX9867_ADCLEVEL,
+                        4, 15, 1, max9860_adc_left_tlv),
+        SOC_SINGLE_TLV("ADC Right Volume", MAX9867_ADCLEVEL,
+                        0, 15, 1, max9860_adc_right_tlv),
+        SOC_ENUM("Speaker Mode", max9867_spkmode),
+        SOC_SINGLE("Volume Smoothing Switch", MAX9867_MODECONFIG, 6, 1, 0),
+        SOC_SINGLE("ZCD Switch", MAX9867_MODECONFIG, 5, 1, 0),
+        SOC_ENUM("DSP Filter", max9867_filter),
+};
+
+static const char *const max9867_mux[] = {"None", "Mic", "Line", "Mic_Line"};
+
+static SOC_ENUM_SINGLE_DECL(max9867_mux_enum,
+        MAX9867_INPUTCONFIG, MAX9867_INPUT_SHIFT,
+        max9867_mux);
+
+static const struct snd_kcontrol_new max9867_dapm_mux_controls =
+        SOC_DAPM_ENUM("Route", max9867_mux_enum);
+
+static const struct snd_kcontrol_new max9867_left_dapm_control =
+        SOC_DAPM_SINGLE("Switch", MAX9867_PWRMAN, 6, 1, 0);
+static const struct snd_kcontrol_new max9867_right_dapm_control =
+        SOC_DAPM_SINGLE("Switch", MAX9867_PWRMAN, 5, 1, 0);
+static const struct snd_kcontrol_new max9867_line_dapm_control =
+        SOC_DAPM_SINGLE("Switch", MAX9867_LEFTLINELVL, 6, 1, 1);
+
+static const struct snd_soc_dapm_widget max9867_dapm_widgets[] = {
+        SND_SOC_DAPM_AIF_IN("DAI_OUT", "HiFi Playback", 0, SND_SOC_NOPM, 0, 0),
+        SND_SOC_DAPM_DAC("Left DAC", NULL, MAX9867_PWRMAN, 3, 0),
+        SND_SOC_DAPM_DAC("Right DAC", NULL, MAX9867_PWRMAN, 2, 0),
+        SND_SOC_DAPM_MIXER("Output Mixer", SND_SOC_NOPM, 0, 0, NULL, 0),
+        SND_SOC_DAPM_OUTPUT("HPOUT"),
+
+        SND_SOC_DAPM_AIF_IN("DAI_IN", "HiFi Capture", 0, SND_SOC_NOPM, 0, 0),
+        SND_SOC_DAPM_ADC("Left ADC", "HiFi Capture", MAX9867_PWRMAN, 1, 0),
+        SND_SOC_DAPM_ADC("Right ADC", "HiFi Capture", MAX9867_PWRMAN, 0, 0),
+        SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0,
+                &max9867_dapm_mux_controls),
+
+        SND_SOC_DAPM_MIXER("Input Mixer", SND_SOC_NOPM, 0, 0, NULL, 0),
+        SND_SOC_DAPM_SWITCH("Left Line", MAX9867_LEFTLINELVL, 6, 1,
+                &max9867_left_dapm_control),
+        SND_SOC_DAPM_SWITCH("Right Line", MAX9867_RIGTHLINELVL, 6, 1,
+                &max9867_right_dapm_control),
+        SND_SOC_DAPM_SWITCH("Line Mixer", SND_SOC_NOPM, 0, 0,
+                &max9867_line_dapm_control),
+        SND_SOC_DAPM_INPUT("LINE_IN"),
+};
+
+static const struct snd_soc_dapm_route max9867_audio_map[] = {
+        {"Left DAC", NULL, "DAI_OUT"},
+        {"Right DAC", NULL, "DAI_OUT"},
+        {"Output Mixer", NULL, "Left DAC"},
+        {"Output Mixer", NULL, "Right DAC"},
+        {"HPOUT", NULL, "Output Mixer"},
+
+        {"Left ADC", NULL, "DAI_IN"},
+        {"Right ADC", NULL, "DAI_IN"},
+        {"Input Mixer", NULL, "Left ADC"},
+        {"Input Mixer", NULL, "Right ADC"},
+        {"Input Mux", "Line", "Input Mixer"},
+        {"Input Mux", "Mic", "Input Mixer"},
+        {"Input Mux", "Mic_Line", "Input Mixer"},
+        {"Right Line", "Switch", "Input Mux"},
+        {"Left Line", "Switch", "Input Mux"},
+        {"LINE_IN", NULL, "Left Line"},
+        {"LINE_IN", NULL, "Right Line"},
+};
+
+enum rates {
+        pcm_rate_8, pcm_rate_16, pcm_rate_24,
+        pcm_rate_32, pcm_rate_44,
+        pcm_rate_48, max_pcm_rate,
+};
+
+struct ni_div_rates {
+        u32 mclk;
+        u16 ni[max_pcm_rate];
+} ni_div[] = {
+        {11289600, {0x116A, 0x22D4, 0x343F, 0x45A9, 0x6000, 0x687D} },
+        {12000000, {0x1062, 0x20C5, 0x3127, 0x4189, 0x5A51, 0x624E} },
+        {12288000, {0x1000, 0x2000, 0x3000, 0x4000, 0x5833, 0x6000} },
+        {13000000, {0x0F20, 0x1E3F, 0x2D5F, 0x3C7F, 0x535F, 0x5ABE} },
+        {19200000, {0x0A3D, 0x147B, 0x1EB8, 0x28F6, 0x3873, 0x3D71} },
+        {24000000, {0x1062, 0x20C5, 0x1893, 0x4189, 0x5A51, 0x624E} },
+        {26000000, {0x0F20, 0x1E3F, 0x16AF, 0x3C7F, 0x535F, 0x5ABE} },
+        {27000000, {0x0E90, 0x1D21, 0x15D8, 0x3A41, 0x5048, 0x5762} },
+};
+
+static inline int get_ni_value(int mclk, int rate)
+{
+        int i, ret = 0;
+
+        /* find the closest rate index*/
+        for (i = 0; i < ARRAY_SIZE(ni_div); i++) {
+                if (ni_div[i].mclk >= mclk)
+                        break;
+        }
+
+        switch (rate) {
+        case 8000:
+                return ni_div[i].ni[pcm_rate_8];
+        case 16000:
+                return ni_div[i].ni[pcm_rate_16];
+        case 32000:
+                return ni_div[i].ni[pcm_rate_32];
+        case 44100:
+                return ni_div[i].ni[pcm_rate_44];
+        case 48000:
+                return ni_div[i].ni[pcm_rate_48];
+        default:
+                pr_err("%s wrong rate %d\n", __func__, rate);
+                ret = -EINVAL;
+        }
+        return ret;
+}
+
+static int max9867_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 max9867_priv *max9867 = snd_soc_codec_get_drvdata(codec);
+        unsigned int ni_h, ni_l, value;
+
+        value = get_ni_value(max9867->sysclk, params_rate(params));
+        if (value < 0)
+                return value;
+
+        ni_h = (0xFF00 & value) >> 8;
+        ni_l = 0x00FF & value;
+        /* set up the ni value */
+        regmap_update_bits(max9867->regmap, MAX9867_AUDIOCLKHIGH,
+                MAX9867_NI_HIGH_MASK, ni_h);
+        regmap_update_bits(max9867->regmap, MAX9867_AUDIOCLKLOW,
+                MAX9867_NI_LOW_MASK, ni_l);
+        if (!max9867->master) {
+                /*
+                 * digital pll locks on to any externally supplied LRCLK signal
+                 * and also enable rapid lock mode.
+                 */
+                regmap_update_bits(max9867->regmap, MAX9867_AUDIOCLKLOW,
+                        MAX9867_RAPID_LOCK, MAX9867_RAPID_LOCK);
+                regmap_update_bits(max9867->regmap, MAX9867_AUDIOCLKHIGH,
+                        MAX9867_PLL, MAX9867_PLL);
+        } else {
+                unsigned long int bclk_rate, pclk_bclk_ratio;
+                int bclk_value;
+
+                bclk_rate = params_rate(params) * 2 *
+                        snd_pcm_format_width(params_format(params));
+                pclk_bclk_ratio = max9867->pclk/bclk_rate;
+                switch (snd_pcm_format_width(params_format(params))) {
+                case 8:
+                case 16:
+                        if (pclk_bclk_ratio == 2)
+                                bclk_value = MAX9867_IFC1B_PCLK_2;
+                        else if (pclk_bclk_ratio == 4)
+                                bclk_value = MAX9867_IFC1B_PCLK_4;
+                        else if (pclk_bclk_ratio == 8)
+                                bclk_value = MAX9867_IFC1B_PCLK_8;
+                        else if (pclk_bclk_ratio == 16)
+                                bclk_value = MAX9867_IFC1B_PCLK_16;
+                        else {
+                                dev_err(codec->dev, "unsupported sampling rate\n");
+                                return -EINVAL;
+                        }
+                        break;
+                case 24:
+                        bclk_value = MAX9867_IFC1B_24BIT;
+                        break;
+                case 32:
+                        bclk_value = MAX9867_IFC1B_32BIT;
+                        break;
+                default:
+                        dev_err(codec->dev, "unsupported sampling rate\n");
+                        return -EINVAL;
+                }
+                regmap_update_bits(max9867->regmap, MAX9867_IFC1B,
+                        MAX9867_IFC1B_BCLK_MASK, bclk_value);
+        }
+        return 0;
+}
+
+static int max9867_prepare(struct snd_pcm_substream *substream,
+                         struct snd_soc_dai *dai)
+{
+        struct snd_soc_codec *codec = dai->codec;
+        struct max9867_priv *max9867 = snd_soc_codec_get_drvdata(codec);
+
+        regmap_update_bits(max9867->regmap, MAX9867_PWRMAN,
+                MAX9867_SHTDOWN_MASK, MAX9867_SHTDOWN_MASK);
+        return 0;
+}
+
+static int max9867_mute(struct snd_soc_dai *dai, int mute)
+{
+        struct snd_soc_codec *codec = dai->codec;
+        struct max9867_priv *max9867 = snd_soc_codec_get_drvdata(codec);
+
+        if (mute)
+                regmap_update_bits(max9867->regmap, MAX9867_DACLEVEL,
+                        MAX9867_DAC_MUTE_MASK, MAX9867_DAC_MUTE_MASK);
+        else
+                regmap_update_bits(max9867->regmap, MAX9867_DACLEVEL,
+                        MAX9867_DAC_MUTE_MASK, 0);
+        return 0;
+}
+
+static int max9867_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 max9867_priv *max9867 = snd_soc_codec_get_drvdata(codec);
+        int value = 0;
+
+        /* Set the prescaler based on the master clock frequency*/
+        if (freq >= 10000000 && freq <= 20000000) {
+                value |= MAX9867_PSCLK_10_20;
+                max9867->pclk =  freq;
+        } else if (freq >= 20000000 && freq <= 40000000) {
+                value |= MAX9867_PSCLK_20_40;
+                max9867->pclk =  freq/2;
+        } else if (freq >= 40000000 && freq <= 60000000) {
+                value |= MAX9867_PSCLK_40_60;
+                max9867->pclk =  freq/4;
+        } else {
+                pr_err("bad clock frequency %d", freq);
+                return -EINVAL;
+        }
+        value = value << MAX9867_PSCLK_SHIFT;
+        max9867->sysclk = freq;
+        /* exact integer mode is not supported */
+        value &= ~MAX9867_FREQ_MASK;
+        regmap_update_bits(max9867->regmap, MAX9867_SYSCLK,
+                        MAX9867_PSCLK_MASK, value);
+        return 0;
+}
+
+static int max9867_dai_set_fmt(struct snd_soc_dai *codec_dai,
+                unsigned int fmt)
+{
+        struct snd_soc_codec *codec = codec_dai->codec;
+        struct max9867_priv *max9867 = snd_soc_codec_get_drvdata(codec);
+        u8 iface1A = 0, iface1B = 0;
+        int ret;
+
+        switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
+        case SND_SOC_DAIFMT_CBM_CFM:
+                max9867->master = 1;
+                iface1A |= MAX9867_MASTER;
+                break;
+        case SND_SOC_DAIFMT_CBS_CFS:
+                max9867->master = 0;
+                iface1A &= ~MAX9867_MASTER;
+                break;
+        default:
+                return -EINVAL;
+        }
+
+        /* for i2s compatible mode */
+        iface1A |= MAX9867_I2S_DLY;
+        /* SDOUT goes to hiz state after all data is transferred */
+        iface1A |= MAX9867_SDOUT_HIZ;
+
+        /* Clock inversion bits, BCI and WCI */
+        switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
+        case SND_SOC_DAIFMT_NB_NF:
+                break;
+        case SND_SOC_DAIFMT_IB_IF:
+                iface1A |= MAX9867_WCI_MODE | MAX9867_BCI_MODE;
+                break;
+        case SND_SOC_DAIFMT_IB_NF:
+                iface1A |= MAX9867_BCI_MODE;
+                break;
+        case SND_SOC_DAIFMT_NB_IF:
+                iface1A |= MAX9867_WCI_MODE;
+                break;
+        default:
+                return -EINVAL;
+        }
+
+        ret = regmap_write(max9867->regmap, MAX9867_IFC1A, iface1A);
+        ret = regmap_write(max9867->regmap, MAX9867_IFC1B, iface1B);
+        return 0;
+}
+
+static struct snd_soc_dai_ops max9867_dai_ops = {
+        .set_fmt = max9867_dai_set_fmt,
+        .set_sysclk     = max9867_set_dai_sysclk,
+        .prepare        = max9867_prepare,
+        .digital_mute   = max9867_mute,
+        .hw_params = max9867_dai_hw_params,
+};
+
+#define MAX9867_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 |\
+        SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000)
+#define MAX9867_FORMATS (SNDRV_PCM_FMTBIT_S16_LE)
+
+static struct snd_soc_dai_driver max9867_dai[] = {
+        {
+        .name = "max9867-aif1",
+        .playback = {
+                .stream_name = "HiFi Playback",
+                .channels_min = 1,
+                .channels_max = 2,
+                .rates = MAX9867_RATES,
+                .formats = MAX9867_FORMATS,
+        },
+        .capture = {
+                .stream_name = "HiFi Capture",
+                .channels_min = 1,
+                .channels_max = 2,
+                .rates = MAX9867_RATES,
+                .formats = MAX9867_FORMATS,
+        },
+        .ops = &max9867_dai_ops,
+        }
+};
+
+#ifdef CONFIG_PM_SLEEP
+static int max9867_suspend(struct device *dev)
+{
+        struct max9867_priv *max9867 = dev_get_drvdata(dev);
+
+        /* Drop down to power saving mode when system is suspended */
+        regmap_update_bits(max9867->regmap, MAX9867_PWRMAN,
+                MAX9867_SHTDOWN_MASK, ~MAX9867_SHTDOWN_MASK);
+        return 0;
+}
+
+static int max9867_resume(struct device *dev)
+{
+        struct max9867_priv *max9867 = dev_get_drvdata(dev);
+
+        regmap_update_bits(max9867->regmap, MAX9867_PWRMAN,
+                MAX9867_SHTDOWN_MASK, MAX9867_SHTDOWN_MASK);
+        return 0;
+}
+#endif
+
+static int max9867_probe(struct snd_soc_codec *codec)
+{
+        struct max9867_priv *max9867 = snd_soc_codec_get_drvdata(codec);
+
+        dev_dbg(codec->dev, "max98090_probe\n");
+        max9867->codec = codec;
+        return 0;
+}
+
+static struct snd_soc_codec_driver max9867_codec = {
+        .probe = max9867_probe,
+        .controls = max9867_snd_controls,
+        .num_controls = ARRAY_SIZE(max9867_snd_controls),
+        .dapm_routes = max9867_audio_map,
+        .num_dapm_routes = ARRAY_SIZE(max9867_audio_map),
+        .dapm_widgets = max9867_dapm_widgets,
+        .num_dapm_widgets = ARRAY_SIZE(max9867_dapm_widgets),
+};
+
+static bool max9867_volatile_register(struct device *dev, unsigned int reg)
+{
+        switch (reg) {
+        case MAX9867_STATUS:
+        case MAX9867_JACKSTATUS:
+        case MAX9867_AUXHIGH:
+        case MAX9867_AUXLOW:
+                return true;
+        default:
+                return false;
+        }
+}
+
+static struct reg_default max9867_reg[] = {
+        { 0x04, 0x00 },
+        { 0x05, 0x00 },
+        { 0x06, 0x00 },
+        { 0x07, 0x00 },
+        { 0x08, 0x00 },
+        { 0x09, 0x00 },
+        { 0x0A, 0x00 },
+        { 0x0B, 0x00 },
+        { 0x0C, 0x00 },
+        { 0x0D, 0x00 },
+        { 0x0E, 0x00 },
+        { 0x0F, 0x00 },
+        { 0x10, 0x00 },
+        { 0x11, 0x00 },
+        { 0x12, 0x00 },
+        { 0x13, 0x00 },
+        { 0x14, 0x00 },
+        { 0x15, 0x00 },
+        { 0x16, 0x00 },
+        { 0x17, 0x00 },
+};
+
+static struct regmap_config max9867_regmap = {
+        .reg_bits       = 8,
+        .val_bits       = 8,
+        .max_register   = MAX9867_REVISION,
+        .reg_defaults   = max9867_reg,
+        .num_reg_defaults = ARRAY_SIZE(max9867_reg),
+        .volatile_reg   = max9867_volatile_register,
+        .cache_type     = REGCACHE_RBTREE,
+};
+
+static int max9867_i2c_probe(struct i2c_client *i2c,
+                const struct i2c_device_id *id)
+{
+        struct max9867_priv *max9867;
+        int ret = 0, reg;
+
+        max9867 = devm_kzalloc(&i2c->dev,
+                        sizeof(*max9867), GFP_KERNEL);
+        if (!max9867)
+                return -ENOMEM;
+
+        i2c_set_clientdata(i2c, max9867);
+        max9867->regmap = devm_regmap_init_i2c(i2c, &max9867_regmap);
+        if (IS_ERR(max9867->regmap)) {
+                ret = PTR_ERR(max9867->regmap);
+                dev_err(&i2c->dev,
+                                "Failed to allocate regmap: %d\n", ret);
+                return ret;
+        }
+        ret = regmap_read(max9867->regmap,
+                        MAX9867_REVISION, &reg);
+        if (ret < 0) {
+                dev_err(&i2c->dev, "Failed to read: %d\n", ret);
+                return ret;
+        }
+        dev_info(&i2c->dev, "device revision: %x\n", reg);
+        ret = snd_soc_register_codec(&i2c->dev, &max9867_codec,
+                        max9867_dai, ARRAY_SIZE(max9867_dai));
+        if (ret < 0) {
+                dev_err(&i2c->dev, "Failed to register codec: %d\n", ret);
+                return ret;
+        }
+        return ret;
+}
+
+static int max9867_i2c_remove(struct i2c_client *client)
+{
+        snd_soc_unregister_codec(&client->dev);
+        return 0;
+}
+
+static const struct i2c_device_id max9867_i2c_id[] = {
+        { "max9867", 0 },
+};
+
+static const struct of_device_id max9867_of_match[] = {
+        { .compatible = "maxim,max9867", },
+        { }
+};
+
+MODULE_DEVICE_TABLE(i2c, max9867_i2c_id);
+
+static const struct dev_pm_ops max9867_pm_ops = {
+        SET_SYSTEM_SLEEP_PM_OPS(max9867_suspend, max9867_resume)
+};
+
+static struct i2c_driver max9867_i2c_driver = {
+        .driver = {
+                .name = "max9867",
+                .of_match_table = of_match_ptr(max9867_of_match),
+                .pm = &max9867_pm_ops,
+        },
+        .probe  = max9867_i2c_probe,
+        .remove = max9867_i2c_remove,
+        .id_table = max9867_i2c_id,
+};
+
+module_i2c_driver(max9867_i2c_driver);
+
+MODULE_AUTHOR("anish kumar <yesanishhere@gmail.com>");
+MODULE_DESCRIPTION("ALSA SoC MAX9867 driver");
+MODULE_LICENSE("GPL");
diff --git a/sound/soc/codecs/max9867.h b/sound/soc/codecs/max9867.h
new file mode 100755
index 000000000000..65590b4ad62a
--- /dev/null
+++ b/sound/soc/codecs/max9867.h
@@ -0,0 +1,83 @@
+/*
+ * max9867.h -- MAX9867 ALSA SoC Audio driver
+ *
+ * Copyright 2013-2015 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 _MAX9867_H
+#define _MAX9867_H
+
+/* MAX9867 register space */
+
+#define MAX9867_STATUS        0x00
+#define MAX9867_JACKSTATUS   0x01
+#define MAX9867_AUXHIGH      0x02
+#define MAX9867_AUXLOW       0x03
+#define MAX9867_INTEN        0x04
+#define MAX9867_SYSCLK       0x05
+#define MAX9867_FREQ_MASK    0xF
+#define MAX9867_PSCLK_SHIFT  0x4
+#define MAX9867_PSCLK_WIDTH  0x2
+#define MAX9867_PSCLK_MASK   (0x03<<MAX9867_PSCLK_SHIFT)
+#define MAX9867_PSCLK_10_20  0x1
+#define MAX9867_PSCLK_20_40  0x2
+#define MAX9867_PSCLK_40_60  0x3
+#define MAX9867_AUDIOCLKHIGH 0x06
+#define MAX9867_NI_HIGH_WIDTH 0x7
+#define MAX9867_NI_HIGH_MASK 0x7F
+#define MAX9867_NI_LOW_MASK 0x7F
+#define MAX9867_NI_LOW_SHIFT 0x1
+#define MAX9867_PLL     (1<<7)
+#define MAX9867_AUDIOCLKLOW  0x07
+#define MAX9867_RAPID_LOCK   0x01
+#define MAX9867_IFC1A        0x08
+#define MAX9867_MASTER       (1<<7)
+#define MAX9867_I2S_DLY      (1<<4)
+#define MAX9867_SDOUT_HIZ    (1<<3)
+#define MAX9867_TDM_MODE     (1<<2)
+#define MAX9867_WCI_MODE     (1<<6)
+#define MAX9867_BCI_MODE     (1<<5)
+#define MAX9867_IFC1B        0x09
+#define MAX9867_IFC1B_BCLK_MASK 7
+#define MAX9867_IFC1B_32BIT  0x01
+#define MAX9867_IFC1B_24BIT  0x02
+#define MAX9867_IFC1B_PCLK_2 4
+#define MAX9867_IFC1B_PCLK_4 5
+#define MAX9867_IFC1B_PCLK_8 6
+#define MAX9867_IFC1B_PCLK_16 7
+#define MAX9867_CODECFLTR    0x0a
+#define MAX9867_DACGAIN      0x0b
+#define MAX9867_DACLEVEL     0x0c
+#define MAX9867_DAC_MUTE_SHIFT 0x6
+#define MAX9867_DAC_MUTE_WIDTH 0x1
+#define MAX9867_DAC_MUTE_MASK (0x1<<MAX9867_DAC_MUTE_SHIFT)
+#define MAX9867_ADCLEVEL     0x0d
+#define MAX9867_LEFTLINELVL  0x0e
+#define MAX9867_RIGTHLINELVL 0x0f
+#define MAX9867_LEFTVOL      0x10
+#define MAX9867_RIGHTVOL     0x11
+#define MAX9867_LEFTMICGAIN  0x12
+#define MAX9867_RIGHTMICGAIN 0x13
+#define MAX9867_INPUTCONFIG  0x14
+#define MAX9867_INPUT_SHIFT  0x6
+#define MAX9867_MICCONFIG    0x15
+#define MAX9867_MODECONFIG   0x16
+#define MAX9867_PWRMAN       0x17
+#define MAX9867_SHTDOWN_MASK (1<<7)
+#define MAX9867_REVISION     0xff
+
+#define MAX9867_CACHEREGNUM 10
+
+/* codec private data */
+struct max9867_priv {
+        struct regmap *regmap;
+        struct snd_soc_codec *codec;
+        unsigned int sysclk;
+        unsigned int pclk;
+        unsigned int master;
+};
+#endif