sound/soc/codecs/max9867.c

   1 /*
   2  * max9867.c -- max9867 ALSA SoC Audio driver
   3  *
   4  * Copyright 2013-15 Maxim Integrated Products
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10
  11 #include <linux/delay.h>
  12 #include <linux/i2c.h>
  13 #include <linux/module.h>
  14 #include <linux/regmap.h>
  15 #include <sound/pcm_params.h>
  16 #include <sound/soc.h>
  17 #include <sound/tlv.h>
  18 #include "max9867.h"
  19
  20 static const char *const max9867_spmode[] = {
  21         "Stereo Diff", "Mono Diff",
  22         "Stereo Cap", "Mono Cap",
  23         "Stereo Single", "Mono Single",
  24         "Stereo Single Fast", "Mono Single Fast"
  25 };
  26 static const char *const max9867_sidetone_text[] = {
  27         "None", "Left", "Right", "LeftRight", "LeftRightDiv2",
  28 };
  29 static const char *const max9867_filter_text[] = {"IIR", "FIR"};
  30
  31 static SOC_ENUM_SINGLE_DECL(max9867_filter, MAX9867_CODECFLTR, 7,
  32         max9867_filter_text);
  33 static SOC_ENUM_SINGLE_DECL(max9867_spkmode, MAX9867_MODECONFIG, 0,
  34         max9867_spmode);
  35 static SOC_ENUM_SINGLE_DECL(max9867_sidetone, MAX9867_DACGAIN, 6,
  36         max9867_sidetone_text);
  37 static DECLARE_TLV_DB_SCALE(max9860_capture_tlv, -600, 200, 0);
  38 static DECLARE_TLV_DB_SCALE(max9860_mic_tlv, 2000, 100, 1);
  39 static DECLARE_TLV_DB_SCALE(max9860_adc_left_tlv, -1200, 100, 1);
  40 static DECLARE_TLV_DB_SCALE(max9860_adc_right_tlv, -1200, 100, 1);
  41 static const unsigned int max98088_micboost_tlv[] = {
  42         TLV_DB_RANGE_HEAD(2),
  43         0, 1, TLV_DB_SCALE_ITEM(0, 2000, 0),
  44         2, 2, TLV_DB_SCALE_ITEM(3000, 0, 0),
  45 };
  46
  47 static const struct snd_kcontrol_new max9867_snd_controls[] = {
  48         SOC_DOUBLE_R("Master Playback Volume", MAX9867_LEFTVOL,
  49                                 MAX9867_RIGHTVOL, 0, 63, 1),
  50         SOC_DOUBLE_R_TLV("Capture Volume", MAX9867_LEFTMICGAIN,
  51                         MAX9867_RIGHTMICGAIN,
  52                         0, 15, 1, max9860_capture_tlv),
  53         SOC_DOUBLE_R_TLV("Mic Volume", MAX9867_LEFTMICGAIN,
  54                         MAX9867_RIGHTMICGAIN, 0, 31, 1, max9860_mic_tlv),
  55         SOC_DOUBLE_R_TLV("Mic Boost Volume", MAX9867_LEFTMICGAIN,
  56                         MAX9867_RIGHTMICGAIN, 5, 3, 0, max98088_micboost_tlv),
  57         SOC_ENUM("Digital Sidetone Src", max9867_sidetone),
  58         SOC_SINGLE("Sidetone Volume", MAX9867_DACGAIN, 0, 31, 1),
  59         SOC_SINGLE("DAC Volume", MAX9867_DACLEVEL, 4, 3, 0),
  60         SOC_SINGLE("DAC Attenuation", MAX9867_DACLEVEL, 0, 15, 1),
  61         SOC_SINGLE_TLV("ADC Left Volume", MAX9867_ADCLEVEL,
  62                         4, 15, 1, max9860_adc_left_tlv),
  63         SOC_SINGLE_TLV("ADC Right Volume", MAX9867_ADCLEVEL,
  64                         0, 15, 1, max9860_adc_right_tlv),
  65         SOC_ENUM("Speaker Mode", max9867_spkmode),
  66         SOC_SINGLE("Volume Smoothing Switch", MAX9867_MODECONFIG, 6, 1, 0),
  67         SOC_SINGLE("ZCD Switch", MAX9867_MODECONFIG, 5, 1, 0),
  68         SOC_ENUM("DSP Filter", max9867_filter),
  69 };
  70
  71 static const char *const max9867_mux[] = {"None", "Mic", "Line", "Mic_Line"};
  72
  73 static SOC_ENUM_SINGLE_DECL(max9867_mux_enum,
  74         MAX9867_INPUTCONFIG, MAX9867_INPUT_SHIFT,
  75         max9867_mux);
  76
  77 static const struct snd_kcontrol_new max9867_dapm_mux_controls =
  78         SOC_DAPM_ENUM("Route", max9867_mux_enum);
  79
  80 static const struct snd_kcontrol_new max9867_left_dapm_control =
  81         SOC_DAPM_SINGLE("Switch", MAX9867_PWRMAN, 6, 1, 0);
  82 static const struct snd_kcontrol_new max9867_right_dapm_control =
  83         SOC_DAPM_SINGLE("Switch", MAX9867_PWRMAN, 5, 1, 0);
  84 static const struct snd_kcontrol_new max9867_line_dapm_control =
  85         SOC_DAPM_SINGLE("Switch", MAX9867_LEFTLINELVL, 6, 1, 1);
  86
  87 static const struct snd_soc_dapm_widget max9867_dapm_widgets[] = {
  88         SND_SOC_DAPM_AIF_IN("DAI_OUT", "HiFi Playback", 0, SND_SOC_NOPM, 0, 0),
  89         SND_SOC_DAPM_DAC("Left DAC", NULL, MAX9867_PWRMAN, 3, 0),
  90         SND_SOC_DAPM_DAC("Right DAC", NULL, MAX9867_PWRMAN, 2, 0),
  91         SND_SOC_DAPM_MIXER("Output Mixer", SND_SOC_NOPM, 0, 0, NULL, 0),
  92         SND_SOC_DAPM_OUTPUT("HPOUT"),
  93
  94         SND_SOC_DAPM_AIF_IN("DAI_IN", "HiFi Capture", 0, SND_SOC_NOPM, 0, 0),
  95         SND_SOC_DAPM_ADC("Left ADC", "HiFi Capture", MAX9867_PWRMAN, 1, 0),
  96         SND_SOC_DAPM_ADC("Right ADC", "HiFi Capture", MAX9867_PWRMAN, 0, 0),
  97         SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0,
  98                 &max9867_dapm_mux_controls),
  99
 100         SND_SOC_DAPM_MIXER("Input Mixer", SND_SOC_NOPM, 0, 0, NULL, 0),
 101         SND_SOC_DAPM_SWITCH("Left Line", MAX9867_LEFTLINELVL, 6, 1,
 102                 &max9867_left_dapm_control),
 103         SND_SOC_DAPM_SWITCH("Right Line", MAX9867_RIGTHLINELVL, 6, 1,
 104                 &max9867_right_dapm_control),
 105         SND_SOC_DAPM_SWITCH("Line Mixer", SND_SOC_NOPM, 0, 0,
 106                 &max9867_line_dapm_control),
 107         SND_SOC_DAPM_INPUT("LINE_IN"),
 108 };
 109
 110 static const struct snd_soc_dapm_route max9867_audio_map[] = {
 111         {"Left DAC", NULL, "DAI_OUT"},
 112         {"Right DAC", NULL, "DAI_OUT"},
 113         {"Output Mixer", NULL, "Left DAC"},
 114         {"Output Mixer", NULL, "Right DAC"},
 115         {"HPOUT", NULL, "Output Mixer"},
 116
 117         {"Left ADC", NULL, "DAI_IN"},
 118         {"Right ADC", NULL, "DAI_IN"},
 119         {"Input Mixer", NULL, "Left ADC"},
 120         {"Input Mixer", NULL, "Right ADC"},
 121         {"Input Mux", "Line", "Input Mixer"},
 122         {"Input Mux", "Mic", "Input Mixer"},
 123         {"Input Mux", "Mic_Line", "Input Mixer"},
 124         {"Right Line", "Switch", "Input Mux"},
 125         {"Left Line", "Switch", "Input Mux"},
 126         {"LINE_IN", NULL, "Left Line"},
 127         {"LINE_IN", NULL, "Right Line"},
 128 };
 129
 130 enum rates {
 131         pcm_rate_8, pcm_rate_16, pcm_rate_24,
 132         pcm_rate_32, pcm_rate_44,
 133         pcm_rate_48, max_pcm_rate,
 134 };
 135
 136 struct ni_div_rates {
 137         u32 mclk;
 138         u16 ni[max_pcm_rate];
 139 } ni_div[] = {
 140         {11289600, {0x116A, 0x22D4, 0x343F, 0x45A9, 0x6000, 0x687D} },
 141         {12000000, {0x1062, 0x20C5, 0x3127, 0x4189, 0x5A51, 0x624E} },
 142         {12288000, {0x1000, 0x2000, 0x3000, 0x4000, 0x5833, 0x6000} },
 143         {13000000, {0x0F20, 0x1E3F, 0x2D5F, 0x3C7F, 0x535F, 0x5ABE} },
 144         {19200000, {0x0A3D, 0x147B, 0x1EB8, 0x28F6, 0x3873, 0x3D71} },
 145         {24000000, {0x1062, 0x20C5, 0x1893, 0x4189, 0x5A51, 0x624E} },
 146         {26000000, {0x0F20, 0x1E3F, 0x16AF, 0x3C7F, 0x535F, 0x5ABE} },
 147         {27000000, {0x0E90, 0x1D21, 0x15D8, 0x3A41, 0x5048, 0x5762} },
 148 };
 149
 150 static inline int get_ni_value(int mclk, int rate)
 151 {
 152         int i, ret = 0;
 153
 154         /* find the closest rate index*/
 155         for (i = 0; i < ARRAY_SIZE(ni_div); i++) {
 156                 if (ni_div[i].mclk >= mclk)
 157                         break;
 158         }
 159         if (i == ARRAY_SIZE(ni_div))
 160                 return -EINVAL;
 161
 162         switch (rate) {
 163         case 8000:
 164                 return ni_div[i].ni[pcm_rate_8];
 165         case 16000:
 166                 return ni_div[i].ni[pcm_rate_16];
 167         case 32000:
 168                 return ni_div[i].ni[pcm_rate_32];
 169         case 44100:
 170                 return ni_div[i].ni[pcm_rate_44];
 171         case 48000:
 172                 return ni_div[i].ni[pcm_rate_48];
 173         default:
 174                 pr_err("%s wrong rate %d\n", __func__, rate);
 175                 ret = -EINVAL;
 176         }
 177         return ret;
 178 }
 179
 180 static int max9867_dai_hw_params(struct snd_pcm_substream *substream,
 181                 struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
 182 {
 183         struct snd_soc_codec *codec = dai->codec;
 184         struct max9867_priv *max9867 = snd_soc_codec_get_drvdata(codec);
 185         unsigned int ni_h, ni_l;
 186         int value;
 187
 188         value = get_ni_value(max9867->sysclk, params_rate(params));
 189         if (value < 0)
 190                 return value;
 191
 192         ni_h = (0xFF00 & value) >> 8;
 193         ni_l = 0x00FF & value;
 194         /* set up the ni value */
 195         regmap_update_bits(max9867->regmap, MAX9867_AUDIOCLKHIGH,
 196                 MAX9867_NI_HIGH_MASK, ni_h);
 197         regmap_update_bits(max9867->regmap, MAX9867_AUDIOCLKLOW,
 198                 MAX9867_NI_LOW_MASK, ni_l);
 199         if (!max9867->master) {
 200                 /*
 201                  * digital pll locks on to any externally supplied LRCLK signal
 202                  * and also enable rapid lock mode.
 203                  */
 204                 regmap_update_bits(max9867->regmap, MAX9867_AUDIOCLKLOW,
 205                         MAX9867_RAPID_LOCK, MAX9867_RAPID_LOCK);
 206                 regmap_update_bits(max9867->regmap, MAX9867_AUDIOCLKHIGH,
 207                         MAX9867_PLL, MAX9867_PLL);
 208         } else {
 209                 unsigned long int bclk_rate, pclk_bclk_ratio;
 210                 int bclk_value;
 211
 212                 bclk_rate = params_rate(params) * 2 * params_width(params);
 213                 pclk_bclk_ratio = max9867->pclk/bclk_rate;
 214                 switch (params_width(params)) {
 215                 case 8:
 216                 case 16:
 217                         switch (pclk_bclk_ratio) {
 218                         case 2:
 219                                 bclk_value = MAX9867_IFC1B_PCLK_2;
 220                                 break;
 221                         case 4:
 222                                 bclk_value = MAX9867_IFC1B_PCLK_4;
 223                                 break;
 224                         case 8:
 225                                 bclk_value = MAX9867_IFC1B_PCLK_8;
 226                                 break;
 227                         case 16:
 228                                 bclk_value = MAX9867_IFC1B_PCLK_16;
 229                                 break;
 230                         default:
 231                                 dev_err(codec->dev,
 232                                         "unsupported sampling rate\n");
 233                                 return -EINVAL;
 234                         }
 235                         break;
 236                 case 24:
 237                         bclk_value = MAX9867_IFC1B_24BIT;
 238                         break;
 239                 case 32:
 240                         bclk_value = MAX9867_IFC1B_32BIT;
 241                         break;
 242                 default:
 243                         dev_err(codec->dev, "unsupported sampling rate\n");
 244                         return -EINVAL;
 245                 }
 246                 regmap_update_bits(max9867->regmap, MAX9867_IFC1B,
 247                         MAX9867_IFC1B_BCLK_MASK, bclk_value);
 248         }
 249         return 0;
 250 }
 251
 252 static int max9867_prepare(struct snd_pcm_substream *substream,
 253                          struct snd_soc_dai *dai)
 254 {
 255         struct snd_soc_codec *codec = dai->codec;
 256         struct max9867_priv *max9867 = snd_soc_codec_get_drvdata(codec);
 257
 258         regmap_update_bits(max9867->regmap, MAX9867_PWRMAN,
 259                 MAX9867_SHTDOWN_MASK, MAX9867_SHTDOWN_MASK);
 260         return 0;
 261 }
 262
 263 static int max9867_mute(struct snd_soc_dai *dai, int mute)
 264 {
 265         struct snd_soc_codec *codec = dai->codec;
 266         struct max9867_priv *max9867 = snd_soc_codec_get_drvdata(codec);
 267
 268         if (mute)
 269                 regmap_update_bits(max9867->regmap, MAX9867_DACLEVEL,
 270                         MAX9867_DAC_MUTE_MASK, MAX9867_DAC_MUTE_MASK);
 271         else
 272                 regmap_update_bits(max9867->regmap, MAX9867_DACLEVEL,
 273                         MAX9867_DAC_MUTE_MASK, 0);
 274         return 0;
 275 }
 276
 277 static int max9867_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 278                 int clk_id, unsigned int freq, int dir)
 279 {
 280         struct snd_soc_codec *codec = codec_dai->codec;
 281         struct max9867_priv *max9867 = snd_soc_codec_get_drvdata(codec);
 282         int value = 0;
 283
 284         /* Set the prescaler based on the master clock frequency*/
 285         if (freq >= 10000000 && freq <= 20000000) {
 286                 value |= MAX9867_PSCLK_10_20;
 287                 max9867->pclk =  freq;
 288         } else if (freq >= 20000000 && freq <= 40000000) {
 289                 value |= MAX9867_PSCLK_20_40;
 290                 max9867->pclk =  freq/2;
 291         } else if (freq >= 40000000 && freq <= 60000000) {
 292                 value |= MAX9867_PSCLK_40_60;
 293                 max9867->pclk =  freq/4;
 294         } else {
 295                 pr_err("bad clock frequency %d", freq);
 296                 return -EINVAL;
 297         }
 298         value = value << MAX9867_PSCLK_SHIFT;
 299         max9867->sysclk = freq;
 300         /* exact integer mode is not supported */
 301         value &= ~MAX9867_FREQ_MASK;
 302         regmap_update_bits(max9867->regmap, MAX9867_SYSCLK,
 303                         MAX9867_PSCLK_MASK, value);
 304         return 0;
 305 }
 306
 307 static int max9867_dai_set_fmt(struct snd_soc_dai *codec_dai,
 308                 unsigned int fmt)
 309 {
 310         struct snd_soc_codec *codec = codec_dai->codec;
 311         struct max9867_priv *max9867 = snd_soc_codec_get_drvdata(codec);
 312         u8 iface1A = 0, iface1B = 0;
 313         int ret;
 314
 315         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 316         case SND_SOC_DAIFMT_CBM_CFM:
 317                 max9867->master = 1;
 318                 iface1A |= MAX9867_MASTER;
 319                 break;
 320         case SND_SOC_DAIFMT_CBS_CFS:
 321                 max9867->master = 0;
 322                 iface1A &= ~MAX9867_MASTER;
 323                 break;
 324         default:
 325                 return -EINVAL;
 326         }
 327
 328         /* for i2s compatible mode */
 329         iface1A |= MAX9867_I2S_DLY;
 330         /* SDOUT goes to hiz state after all data is transferred */
 331         iface1A |= MAX9867_SDOUT_HIZ;
 332
 333         /* Clock inversion bits, BCI and WCI */
 334         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 335         case SND_SOC_DAIFMT_NB_NF:
 336                 break;
 337         case SND_SOC_DAIFMT_IB_IF:
 338                 iface1A |= MAX9867_WCI_MODE | MAX9867_BCI_MODE;
 339                 break;
 340         case SND_SOC_DAIFMT_IB_NF:
 341                 iface1A |= MAX9867_BCI_MODE;
 342                 break;
 343         case SND_SOC_DAIFMT_NB_IF:
 344                 iface1A |= MAX9867_WCI_MODE;
 345                 break;
 346         default:
 347                 return -EINVAL;
 348         }
 349
 350         ret = regmap_write(max9867->regmap, MAX9867_IFC1A, iface1A);
 351         ret = regmap_write(max9867->regmap, MAX9867_IFC1B, iface1B);
 352         return 0;
 353 }
 354
 355 static struct snd_soc_dai_ops max9867_dai_ops = {
 356         .set_fmt = max9867_dai_set_fmt,
 357         .set_sysclk     = max9867_set_dai_sysclk,
 358         .prepare        = max9867_prepare,
 359         .digital_mute   = max9867_mute,
 360         .hw_params = max9867_dai_hw_params,
 361 };
 362
 363 #define MAX9867_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 |\
 364         SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000)
 365 #define MAX9867_FORMATS (SNDRV_PCM_FMTBIT_S16_LE)
 366
 367 static struct snd_soc_dai_driver max9867_dai[] = {
 368         {
 369         .name = "max9867-aif1",
 370         .playback = {
 371                 .stream_name = "HiFi Playback",
 372                 .channels_min = 1,
 373                 .channels_max = 2,
 374                 .rates = MAX9867_RATES,
 375                 .formats = MAX9867_FORMATS,
 376         },
 377         .capture = {
 378                 .stream_name = "HiFi Capture",
 379                 .channels_min = 1,
 380                 .channels_max = 2,
 381                 .rates = MAX9867_RATES,
 382                 .formats = MAX9867_FORMATS,
 383         },
 384         .ops = &max9867_dai_ops,
 385         }
 386 };
 387
 388 #ifdef CONFIG_PM_SLEEP
 389 static int max9867_suspend(struct device *dev)
 390 {
 391         struct max9867_priv *max9867 = dev_get_drvdata(dev);
 392
 393         /* Drop down to power saving mode when system is suspended */
 394         regmap_update_bits(max9867->regmap, MAX9867_PWRMAN,
 395                 MAX9867_SHTDOWN_MASK, ~MAX9867_SHTDOWN_MASK);
 396         return 0;
 397 }
 398
 399 static int max9867_resume(struct device *dev)
 400 {
 401         struct max9867_priv *max9867 = dev_get_drvdata(dev);
 402
 403         regmap_update_bits(max9867->regmap, MAX9867_PWRMAN,
 404                 MAX9867_SHTDOWN_MASK, MAX9867_SHTDOWN_MASK);
 405         return 0;
 406 }
 407 #endif
 408
 409 static int max9867_probe(struct snd_soc_codec *codec)
 410 {
 411         struct max9867_priv *max9867 = snd_soc_codec_get_drvdata(codec);
 412
 413         dev_dbg(codec->dev, "max98090_probe\n");
 414         max9867->codec = codec;
 415         return 0;
 416 }
 417
 418 static struct snd_soc_codec_driver max9867_codec = {
 419         .probe = max9867_probe,
 420         .controls = max9867_snd_controls,
 421         .num_controls = ARRAY_SIZE(max9867_snd_controls),
 422         .dapm_routes = max9867_audio_map,
 423         .num_dapm_routes = ARRAY_SIZE(max9867_audio_map),
 424         .dapm_widgets = max9867_dapm_widgets,
 425         .num_dapm_widgets = ARRAY_SIZE(max9867_dapm_widgets),
 426 };
 427
 428 static bool max9867_volatile_register(struct device *dev, unsigned int reg)
 429 {
 430         switch (reg) {
 431         case MAX9867_STATUS:
 432         case MAX9867_JACKSTATUS:
 433         case MAX9867_AUXHIGH:
 434         case MAX9867_AUXLOW:
 435                 return true;
 436         default:
 437                 return false;
 438         }
 439 }
 440
 441 static const struct reg_default max9867_reg[] = {
 442         { 0x04, 0x00 },
 443         { 0x05, 0x00 },
 444         { 0x06, 0x00 },
 445         { 0x07, 0x00 },
 446         { 0x08, 0x00 },
 447         { 0x09, 0x00 },
 448         { 0x0A, 0x00 },
 449         { 0x0B, 0x00 },
 450         { 0x0C, 0x00 },
 451         { 0x0D, 0x00 },
 452         { 0x0E, 0x00 },
 453         { 0x0F, 0x00 },
 454         { 0x10, 0x00 },
 455         { 0x11, 0x00 },
 456         { 0x12, 0x00 },
 457         { 0x13, 0x00 },
 458         { 0x14, 0x00 },
 459         { 0x15, 0x00 },
 460         { 0x16, 0x00 },
 461         { 0x17, 0x00 },
 462 };
 463
 464 static const struct regmap_config max9867_regmap = {
 465         .reg_bits       = 8,
 466         .val_bits       = 8,
 467         .max_register   = MAX9867_REVISION,
 468         .reg_defaults   = max9867_reg,
 469         .num_reg_defaults = ARRAY_SIZE(max9867_reg),
 470         .volatile_reg   = max9867_volatile_register,
 471         .cache_type     = REGCACHE_RBTREE,
 472 };
 473
 474 static int max9867_i2c_probe(struct i2c_client *i2c,
 475                 const struct i2c_device_id *id)
 476 {
 477         struct max9867_priv *max9867;
 478         int ret = 0, reg;
 479
 480         max9867 = devm_kzalloc(&i2c->dev,
 481                         sizeof(*max9867), GFP_KERNEL);
 482         if (!max9867)
 483                 return -ENOMEM;
 484
 485         i2c_set_clientdata(i2c, max9867);
 486         max9867->regmap = devm_regmap_init_i2c(i2c, &max9867_regmap);
 487         if (IS_ERR(max9867->regmap)) {
 488                 ret = PTR_ERR(max9867->regmap);
 489                 dev_err(&i2c->dev,
 490                                 "Failed to allocate regmap: %d\n", ret);
 491                 return ret;
 492         }
 493         ret = regmap_read(max9867->regmap,
 494                         MAX9867_REVISION, &reg);
 495         if (ret < 0) {
 496                 dev_err(&i2c->dev, "Failed to read: %d\n", ret);
 497                 return ret;
 498         }
 499         dev_info(&i2c->dev, "device revision: %x\n", reg);
 500         ret = snd_soc_register_codec(&i2c->dev, &max9867_codec,
 501                         max9867_dai, ARRAY_SIZE(max9867_dai));
 502         if (ret < 0) {
 503                 dev_err(&i2c->dev, "Failed to register codec: %d\n", ret);
 504                 return ret;
 505         }
 506         return ret;
 507 }
 508
 509 static int max9867_i2c_remove(struct i2c_client *client)
 510 {
 511         snd_soc_unregister_codec(&client->dev);
 512         return 0;
 513 }
 514
 515 static const struct i2c_device_id max9867_i2c_id[] = {
 516         { "max9867", 0 },
 517         { }
 518 };
 519
 520 static const struct of_device_id max9867_of_match[] = {
 521         { .compatible = "maxim,max9867", },
 522         { }
 523 };
 524
 525 MODULE_DEVICE_TABLE(i2c, max9867_i2c_id);
 526
 527 static const struct dev_pm_ops max9867_pm_ops = {
 528         SET_SYSTEM_SLEEP_PM_OPS(max9867_suspend, max9867_resume)
 529 };
 530
 531 static struct i2c_driver max9867_i2c_driver = {
 532         .driver = {
 533                 .name = "max9867",
 534                 .of_match_table = of_match_ptr(max9867_of_match),
 535                 .pm = &max9867_pm_ops,
 536         },
 537         .probe  = max9867_i2c_probe,
 538         .remove = max9867_i2c_remove,
 539         .id_table = max9867_i2c_id,
 540 };
 541
 542 module_i2c_driver(max9867_i2c_driver);
 543
 544 MODULE_AUTHOR("anish kumar <yesanishhere@gmail.com>");
 545 MODULE_DESCRIPTION("ALSA SoC MAX9867 driver");
 546 MODULE_LICENSE("GPL");