sound/soc/codecs/ak4642.c

   1 /*
   2  * ak4642.c  --  AK4642/AK4643 ALSA Soc Audio driver
   3  *
   4  * Copyright (C) 2009 Renesas Solutions Corp.
   5  * Kuninori Morimoto <morimoto.kuninori@renesas.com>
   6  *
   7  * Based on wm8731.c by Richard Purdie
   8  * Based on ak4535.c by Richard Purdie
   9  * Based on wm8753.c by Liam Girdwood
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License version 2 as
  13  * published by the Free Software Foundation.
  14  */
  15
  16 /* ** CAUTION **
  17  *
  18  * This is very simple driver.
  19  * It can use headphone output / stereo input only
  20  *
  21  * AK4642 is tested.
  22  * AK4643 is tested.
  23  * AK4648 is tested.
  24  */
  25
  26 #include <linux/delay.h>
  27 #include <linux/i2c.h>
  28 #include <linux/slab.h>
  29 #include <linux/of_device.h>
  30 #include <linux/module.h>
  31 #include <linux/regmap.h>
  32 #include <sound/soc.h>
  33 #include <sound/initval.h>
  34 #include <sound/tlv.h>
  35
  36 #define PW_MGMT1        0x00
  37 #define PW_MGMT2        0x01
  38 #define SG_SL1          0x02
  39 #define SG_SL2          0x03
  40 #define MD_CTL1         0x04
  41 #define MD_CTL2         0x05
  42 #define TIMER           0x06
  43 #define ALC_CTL1        0x07
  44 #define ALC_CTL2        0x08
  45 #define L_IVC           0x09
  46 #define L_DVC           0x0a
  47 #define ALC_CTL3        0x0b
  48 #define R_IVC           0x0c
  49 #define R_DVC           0x0d
  50 #define MD_CTL3         0x0e
  51 #define MD_CTL4         0x0f
  52 #define PW_MGMT3        0x10
  53 #define DF_S            0x11
  54 #define FIL3_0          0x12
  55 #define FIL3_1          0x13
  56 #define FIL3_2          0x14
  57 #define FIL3_3          0x15
  58 #define EQ_0            0x16
  59 #define EQ_1            0x17
  60 #define EQ_2            0x18
  61 #define EQ_3            0x19
  62 #define EQ_4            0x1a
  63 #define EQ_5            0x1b
  64 #define FIL1_0          0x1c
  65 #define FIL1_1          0x1d
  66 #define FIL1_2          0x1e
  67 #define FIL1_3          0x1f
  68 #define PW_MGMT4        0x20
  69 #define MD_CTL5         0x21
  70 #define LO_MS           0x22
  71 #define HP_MS           0x23
  72 #define SPK_MS          0x24
  73
  74 /* PW_MGMT1*/
  75 #define PMVCM           (1 << 6) /* VCOM Power Management */
  76 #define PMMIN           (1 << 5) /* MIN Input Power Management */
  77 #define PMDAC           (1 << 2) /* DAC Power Management */
  78 #define PMADL           (1 << 0) /* MIC Amp Lch and ADC Lch Power Management */
  79
  80 /* PW_MGMT2 */
  81 #define HPMTN           (1 << 6)
  82 #define PMHPL           (1 << 5)
  83 #define PMHPR           (1 << 4)
  84 #define MS              (1 << 3) /* master/slave select */
  85 #define MCKO            (1 << 1)
  86 #define PMPLL           (1 << 0)
  87
  88 #define PMHP_MASK       (PMHPL | PMHPR)
  89 #define PMHP            PMHP_MASK
  90
  91 /* PW_MGMT3 */
  92 #define PMADR           (1 << 0) /* MIC L / ADC R Power Management */
  93
  94 /* SG_SL1 */
  95 #define MINS            (1 << 6) /* Switch from MIN to Speaker */
  96 #define DACL            (1 << 4) /* Switch from DAC to Stereo or Receiver */
  97 #define PMMP            (1 << 2) /* MPWR pin Power Management */
  98 #define MGAIN0          (1 << 0) /* MIC amp gain*/
  99
 100 /* TIMER */
 101 #define ZTM(param)      ((param & 0x3) << 4) /* ALC Zero Crossing TimeOut */
 102 #define WTM(param)      (((param & 0x4) << 4) | ((param & 0x3) << 2))
 103
 104 /* ALC_CTL1 */
 105 #define ALC             (1 << 5) /* ALC Enable */
 106 #define LMTH0           (1 << 0) /* ALC Limiter / Recovery Level */
 107
 108 /* MD_CTL1 */
 109 #define PLL3            (1 << 7)
 110 #define PLL2            (1 << 6)
 111 #define PLL1            (1 << 5)
 112 #define PLL0            (1 << 4)
 113 #define PLL_MASK        (PLL3 | PLL2 | PLL1 | PLL0)
 114
 115 #define BCKO_MASK       (1 << 3)
 116 #define BCKO_64         BCKO_MASK
 117
 118 #define DIF_MASK        (3 << 0)
 119 #define DSP             (0 << 0)
 120 #define RIGHT_J         (1 << 0)
 121 #define LEFT_J          (2 << 0)
 122 #define I2S             (3 << 0)
 123
 124 /* MD_CTL2 */
 125 #define FS0             (1 << 0)
 126 #define FS1             (1 << 1)
 127 #define FS2             (1 << 2)
 128 #define FS3             (1 << 5)
 129 #define FS_MASK         (FS0 | FS1 | FS2 | FS3)
 130
 131 /* MD_CTL3 */
 132 #define BST1            (1 << 3)
 133
 134 /* MD_CTL4 */
 135 #define DACH            (1 << 0)
 136
 137 struct ak4642_drvdata {
 138         const struct regmap_config *regmap_config;
 139         int extended_frequencies;
 140 };
 141
 142 struct ak4642_priv {
 143         const struct ak4642_drvdata *drvdata;
 144 };
 145
 146 /*
 147  * Playback Volume (table 39)
 148  *
 149  * max : 0x00 : +12.0 dB
 150  *       ( 0.5 dB step )
 151  * min : 0xFE : -115.0 dB
 152  * mute: 0xFF
 153  */
 154 static const DECLARE_TLV_DB_SCALE(out_tlv, -11550, 50, 1);
 155
 156 static const struct snd_kcontrol_new ak4642_snd_controls[] = {
 157
 158         SOC_DOUBLE_R_TLV("Digital Playback Volume", L_DVC, R_DVC,
 159                          0, 0xFF, 1, out_tlv),
 160         SOC_SINGLE("ALC Capture Switch", ALC_CTL1, 5, 1, 0),
 161         SOC_SINGLE("ALC Capture ZC Switch", ALC_CTL1, 4, 1, 1),
 162 };
 163
 164 static const struct snd_kcontrol_new ak4642_headphone_control =
 165         SOC_DAPM_SINGLE("Switch", PW_MGMT2, 6, 1, 0);
 166
 167 static const struct snd_kcontrol_new ak4642_lout_mixer_controls[] = {
 168         SOC_DAPM_SINGLE("DACL", SG_SL1, 4, 1, 0),
 169 };
 170
 171 static const struct snd_soc_dapm_widget ak4642_dapm_widgets[] = {
 172
 173         /* Outputs */
 174         SND_SOC_DAPM_OUTPUT("HPOUTL"),
 175         SND_SOC_DAPM_OUTPUT("HPOUTR"),
 176         SND_SOC_DAPM_OUTPUT("LINEOUT"),
 177
 178         SND_SOC_DAPM_PGA("HPL Out", PW_MGMT2, 5, 0, NULL, 0),
 179         SND_SOC_DAPM_PGA("HPR Out", PW_MGMT2, 4, 0, NULL, 0),
 180         SND_SOC_DAPM_SWITCH("Headphone Enable", SND_SOC_NOPM, 0, 0,
 181                             &ak4642_headphone_control),
 182
 183         SND_SOC_DAPM_PGA("DACH", MD_CTL4, 0, 0, NULL, 0),
 184
 185         SND_SOC_DAPM_MIXER("LINEOUT Mixer", PW_MGMT1, 3, 0,
 186                            &ak4642_lout_mixer_controls[0],
 187                            ARRAY_SIZE(ak4642_lout_mixer_controls)),
 188
 189         /* DAC */
 190         SND_SOC_DAPM_DAC("DAC", "HiFi Playback", PW_MGMT1, 2, 0),
 191 };
 192
 193 static const struct snd_soc_dapm_route ak4642_intercon[] = {
 194
 195         /* Outputs */
 196         {"HPOUTL", NULL, "HPL Out"},
 197         {"HPOUTR", NULL, "HPR Out"},
 198         {"LINEOUT", NULL, "LINEOUT Mixer"},
 199
 200         {"HPL Out", NULL, "Headphone Enable"},
 201         {"HPR Out", NULL, "Headphone Enable"},
 202
 203         {"Headphone Enable", "Switch", "DACH"},
 204
 205         {"DACH", NULL, "DAC"},
 206
 207         {"LINEOUT Mixer", "DACL", "DAC"},
 208 };
 209
 210 /*
 211  * ak4642 register cache
 212  */
 213 static const struct reg_default ak4642_reg[] = {
 214         {  0, 0x00 }, {  1, 0x00 }, {  2, 0x01 }, {  3, 0x00 },
 215         {  4, 0x02 }, {  5, 0x00 }, {  6, 0x00 }, {  7, 0x00 },
 216         {  8, 0xe1 }, {  9, 0xe1 }, { 10, 0x18 }, { 11, 0x00 },
 217         { 12, 0xe1 }, { 13, 0x18 }, { 14, 0x11 }, { 15, 0x08 },
 218         { 16, 0x00 }, { 17, 0x00 }, { 18, 0x00 }, { 19, 0x00 },
 219         { 20, 0x00 }, { 21, 0x00 }, { 22, 0x00 }, { 23, 0x00 },
 220         { 24, 0x00 }, { 25, 0x00 }, { 26, 0x00 }, { 27, 0x00 },
 221         { 28, 0x00 }, { 29, 0x00 }, { 30, 0x00 }, { 31, 0x00 },
 222         { 32, 0x00 }, { 33, 0x00 }, { 34, 0x00 }, { 35, 0x00 },
 223         { 36, 0x00 },
 224 };
 225
 226 static const struct reg_default ak4648_reg[] = {
 227         {  0, 0x00 }, {  1, 0x00 }, {  2, 0x01 }, {  3, 0x00 },
 228         {  4, 0x02 }, {  5, 0x00 }, {  6, 0x00 }, {  7, 0x00 },
 229         {  8, 0xe1 }, {  9, 0xe1 }, { 10, 0x18 }, { 11, 0x00 },
 230         { 12, 0xe1 }, { 13, 0x18 }, { 14, 0x11 }, { 15, 0xb8 },
 231         { 16, 0x00 }, { 17, 0x00 }, { 18, 0x00 }, { 19, 0x00 },
 232         { 20, 0x00 }, { 21, 0x00 }, { 22, 0x00 }, { 23, 0x00 },
 233         { 24, 0x00 }, { 25, 0x00 }, { 26, 0x00 }, { 27, 0x00 },
 234         { 28, 0x00 }, { 29, 0x00 }, { 30, 0x00 }, { 31, 0x00 },
 235         { 32, 0x00 }, { 33, 0x00 }, { 34, 0x00 }, { 35, 0x00 },
 236         { 36, 0x00 }, { 37, 0x88 }, { 38, 0x88 }, { 39, 0x08 },
 237 };
 238
 239 static int ak4642_dai_startup(struct snd_pcm_substream *substream,
 240                               struct snd_soc_dai *dai)
 241 {
 242         int is_play = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
 243         struct snd_soc_codec *codec = dai->codec;
 244
 245         if (is_play) {
 246                 /*
 247                  * start headphone output
 248                  *
 249                  * PLL, Master Mode
 250                  * Audio I/F Format :MSB justified (ADC & DAC)
 251                  * Bass Boost Level : Middle
 252                  *
 253                  * This operation came from example code of
 254                  * "ASAHI KASEI AK4642" (japanese) manual p97.
 255                  */
 256                 snd_soc_write(codec, L_IVC, 0x91); /* volume */
 257                 snd_soc_write(codec, R_IVC, 0x91); /* volume */
 258         } else {
 259                 /*
 260                  * start stereo input
 261                  *
 262                  * PLL Master Mode
 263                  * Audio I/F Format:MSB justified (ADC & DAC)
 264                  * Pre MIC AMP:+20dB
 265                  * MIC Power On
 266                  * ALC setting:Refer to Table 35
 267                  * ALC bit=“1”
 268                  *
 269                  * This operation came from example code of
 270                  * "ASAHI KASEI AK4642" (japanese) manual p94.
 271                  */
 272                 snd_soc_update_bits(codec, SG_SL1, PMMP | MGAIN0, PMMP | MGAIN0);
 273                 snd_soc_write(codec, TIMER, ZTM(0x3) | WTM(0x3));
 274                 snd_soc_write(codec, ALC_CTL1, ALC | LMTH0);
 275                 snd_soc_update_bits(codec, PW_MGMT1, PMADL, PMADL);
 276                 snd_soc_update_bits(codec, PW_MGMT3, PMADR, PMADR);
 277         }
 278
 279         return 0;
 280 }
 281
 282 static void ak4642_dai_shutdown(struct snd_pcm_substream *substream,
 283                                struct snd_soc_dai *dai)
 284 {
 285         int is_play = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
 286         struct snd_soc_codec *codec = dai->codec;
 287
 288         if (is_play) {
 289         } else {
 290                 /* stop stereo input */
 291                 snd_soc_update_bits(codec, PW_MGMT1, PMADL, 0);
 292                 snd_soc_update_bits(codec, PW_MGMT3, PMADR, 0);
 293                 snd_soc_update_bits(codec, ALC_CTL1, ALC, 0);
 294         }
 295 }
 296
 297 static int ak4642_dai_set_sysclk(struct snd_soc_dai *codec_dai,
 298         int clk_id, unsigned int freq, int dir)
 299 {
 300         struct snd_soc_codec *codec = codec_dai->codec;
 301         struct ak4642_priv *priv = snd_soc_codec_get_drvdata(codec);
 302         u8 pll;
 303         int extended_freq = 0;
 304
 305         switch (freq) {
 306         case 11289600:
 307                 pll = PLL2;
 308                 break;
 309         case 12288000:
 310                 pll = PLL2 | PLL0;
 311                 break;
 312         case 12000000:
 313                 pll = PLL2 | PLL1;
 314                 break;
 315         case 24000000:
 316                 pll = PLL2 | PLL1 | PLL0;
 317                 break;
 318         case 13500000:
 319                 pll = PLL3 | PLL2;
 320                 break;
 321         case 27000000:
 322                 pll = PLL3 | PLL2 | PLL0;
 323                 break;
 324         case 19200000:
 325                 pll = PLL3;
 326                 extended_freq = 1;
 327                 break;
 328         case 13000000:
 329                 pll = PLL3 | PLL2 | PLL1;
 330                 extended_freq = 1;
 331                 break;
 332         case 26000000:
 333                 pll = PLL3 | PLL2 | PLL1 | PLL0;
 334                 extended_freq = 1;
 335                 break;
 336         default:
 337                 return -EINVAL;
 338         }
 339
 340         if (extended_freq && !priv->drvdata->extended_frequencies)
 341                 return -EINVAL;
 342
 343         snd_soc_update_bits(codec, MD_CTL1, PLL_MASK, pll);
 344
 345         return 0;
 346 }
 347
 348 static int ak4642_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
 349 {
 350         struct snd_soc_codec *codec = dai->codec;
 351         u8 data;
 352         u8 bcko;
 353
 354         data = MCKO | PMPLL; /* use MCKO */
 355         bcko = 0;
 356
 357         /* set master/slave audio interface */
 358         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 359         case SND_SOC_DAIFMT_CBM_CFM:
 360                 data |= MS;
 361                 bcko = BCKO_64;
 362                 break;
 363         case SND_SOC_DAIFMT_CBS_CFS:
 364                 break;
 365         default:
 366                 return -EINVAL;
 367         }
 368         snd_soc_update_bits(codec, PW_MGMT2, MS | MCKO | PMPLL, data);
 369         snd_soc_update_bits(codec, MD_CTL1, BCKO_MASK, bcko);
 370
 371         /* format type */
 372         data = 0;
 373         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 374         case SND_SOC_DAIFMT_LEFT_J:
 375                 data = LEFT_J;
 376                 break;
 377         case SND_SOC_DAIFMT_I2S:
 378                 data = I2S;
 379                 break;
 380         /* FIXME
 381          * Please add RIGHT_J / DSP support here
 382          */
 383         default:
 384                 return -EINVAL;
 385         }
 386         snd_soc_update_bits(codec, MD_CTL1, DIF_MASK, data);
 387
 388         return 0;
 389 }
 390
 391 static int ak4642_dai_hw_params(struct snd_pcm_substream *substream,
 392                                 struct snd_pcm_hw_params *params,
 393                                 struct snd_soc_dai *dai)
 394 {
 395         struct snd_soc_codec *codec = dai->codec;
 396         u8 rate;
 397
 398         switch (params_rate(params)) {
 399         case 7350:
 400                 rate = FS2;
 401                 break;
 402         case 8000:
 403                 rate = 0;
 404                 break;
 405         case 11025:
 406                 rate = FS2 | FS0;
 407                 break;
 408         case 12000:
 409                 rate = FS0;
 410                 break;
 411         case 14700:
 412                 rate = FS2 | FS1;
 413                 break;
 414         case 16000:
 415                 rate = FS1;
 416                 break;
 417         case 22050:
 418                 rate = FS2 | FS1 | FS0;
 419                 break;
 420         case 24000:
 421                 rate = FS1 | FS0;
 422                 break;
 423         case 29400:
 424                 rate = FS3 | FS2 | FS1;
 425                 break;
 426         case 32000:
 427                 rate = FS3 | FS1;
 428                 break;
 429         case 44100:
 430                 rate = FS3 | FS2 | FS1 | FS0;
 431                 break;
 432         case 48000:
 433                 rate = FS3 | FS1 | FS0;
 434                 break;
 435         default:
 436                 return -EINVAL;
 437         }
 438         snd_soc_update_bits(codec, MD_CTL2, FS_MASK, rate);
 439
 440         return 0;
 441 }
 442
 443 static int ak4642_set_bias_level(struct snd_soc_codec *codec,
 444                                  enum snd_soc_bias_level level)
 445 {
 446         switch (level) {
 447         case SND_SOC_BIAS_OFF:
 448                 snd_soc_write(codec, PW_MGMT1, 0x00);
 449                 break;
 450         default:
 451                 snd_soc_update_bits(codec, PW_MGMT1, PMVCM, PMVCM);
 452                 break;
 453         }
 454         codec->dapm.bias_level = level;
 455
 456         return 0;
 457 }
 458
 459 static const struct snd_soc_dai_ops ak4642_dai_ops = {
 460         .startup        = ak4642_dai_startup,
 461         .shutdown       = ak4642_dai_shutdown,
 462         .set_sysclk     = ak4642_dai_set_sysclk,
 463         .set_fmt        = ak4642_dai_set_fmt,
 464         .hw_params      = ak4642_dai_hw_params,
 465 };
 466
 467 static struct snd_soc_dai_driver ak4642_dai = {
 468         .name = "ak4642-hifi",
 469         .playback = {
 470                 .stream_name = "Playback",
 471                 .channels_min = 1,
 472                 .channels_max = 2,
 473                 .rates = SNDRV_PCM_RATE_8000_48000,
 474                 .formats = SNDRV_PCM_FMTBIT_S16_LE },
 475         .capture = {
 476                 .stream_name = "Capture",
 477                 .channels_min = 1,
 478                 .channels_max = 2,
 479                 .rates = SNDRV_PCM_RATE_8000_48000,
 480                 .formats = SNDRV_PCM_FMTBIT_S16_LE },
 481         .ops = &ak4642_dai_ops,
 482         .symmetric_rates = 1,
 483 };
 484
 485 static int ak4642_resume(struct snd_soc_codec *codec)
 486 {
 487         struct regmap *regmap = dev_get_regmap(codec->dev, NULL);
 488
 489         regcache_mark_dirty(regmap);
 490         regcache_sync(regmap);
 491         return 0;
 492 }
 493
 494
 495 static int ak4642_probe(struct snd_soc_codec *codec)
 496 {
 497         ak4642_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 498
 499         return 0;
 500 }
 501
 502 static int ak4642_remove(struct snd_soc_codec *codec)
 503 {
 504         ak4642_set_bias_level(codec, SND_SOC_BIAS_OFF);
 505         return 0;
 506 }
 507
 508 static struct snd_soc_codec_driver soc_codec_dev_ak4642 = {
 509         .probe                  = ak4642_probe,
 510         .remove                 = ak4642_remove,
 511         .resume                 = ak4642_resume,
 512         .set_bias_level         = ak4642_set_bias_level,
 513         .controls               = ak4642_snd_controls,
 514         .num_controls           = ARRAY_SIZE(ak4642_snd_controls),
 515         .dapm_widgets           = ak4642_dapm_widgets,
 516         .num_dapm_widgets       = ARRAY_SIZE(ak4642_dapm_widgets),
 517         .dapm_routes            = ak4642_intercon,
 518         .num_dapm_routes        = ARRAY_SIZE(ak4642_intercon),
 519 };
 520
 521 static const struct regmap_config ak4642_regmap = {
 522         .reg_bits               = 8,
 523         .val_bits               = 8,
 524         .max_register           = ARRAY_SIZE(ak4642_reg) + 1,
 525         .reg_defaults           = ak4642_reg,
 526         .num_reg_defaults       = ARRAY_SIZE(ak4642_reg),
 527 };
 528
 529 static const struct regmap_config ak4648_regmap = {
 530         .reg_bits               = 8,
 531         .val_bits               = 8,
 532         .max_register           = ARRAY_SIZE(ak4648_reg) + 1,
 533         .reg_defaults           = ak4648_reg,
 534         .num_reg_defaults       = ARRAY_SIZE(ak4648_reg),
 535 };
 536
 537 static const struct ak4642_drvdata ak4642_drvdata = {
 538         .regmap_config = &ak4642_regmap,
 539 };
 540
 541 static const struct ak4642_drvdata ak4643_drvdata = {
 542         .regmap_config = &ak4642_regmap,
 543 };
 544
 545 static const struct ak4642_drvdata ak4648_drvdata = {
 546         .regmap_config = &ak4648_regmap,
 547         .extended_frequencies = 1,
 548 };
 549
 550 static const struct of_device_id ak4642_of_match[];
 551 static int ak4642_i2c_probe(struct i2c_client *i2c,
 552                             const struct i2c_device_id *id)
 553 {
 554         struct device_node *np = i2c->dev.of_node;
 555         const struct ak4642_drvdata *drvdata = NULL;
 556         struct regmap *regmap;
 557         struct ak4642_priv *priv;
 558
 559         if (np) {
 560                 const struct of_device_id *of_id;
 561
 562                 of_id = of_match_device(ak4642_of_match, &i2c->dev);
 563                 if (of_id)
 564                         drvdata = of_id->data;
 565         } else {
 566                 drvdata = (const struct ak4642_drvdata *)id->driver_data;
 567         }
 568
 569         if (!drvdata) {
 570                 dev_err(&i2c->dev, "Unknown device type\n");
 571                 return -EINVAL;
 572         }
 573
 574         priv = devm_kzalloc(&i2c->dev, sizeof(*priv), GFP_KERNEL);
 575         if (!priv)
 576                 return -ENOMEM;
 577
 578         priv->drvdata = drvdata;
 579
 580         i2c_set_clientdata(i2c, priv);
 581
 582         regmap = devm_regmap_init_i2c(i2c, drvdata->regmap_config);
 583         if (IS_ERR(regmap))
 584                 return PTR_ERR(regmap);
 585
 586         return snd_soc_register_codec(&i2c->dev,
 587                                       &soc_codec_dev_ak4642, &ak4642_dai, 1);
 588 }
 589
 590 static int ak4642_i2c_remove(struct i2c_client *client)
 591 {
 592         snd_soc_unregister_codec(&client->dev);
 593         return 0;
 594 }
 595
 596 static const struct of_device_id ak4642_of_match[] = {
 597         { .compatible = "asahi-kasei,ak4642",   .data = &ak4642_drvdata},
 598         { .compatible = "asahi-kasei,ak4643",   .data = &ak4643_drvdata},
 599         { .compatible = "asahi-kasei,ak4648",   .data = &ak4648_drvdata},
 600         {},
 601 };
 602 MODULE_DEVICE_TABLE(of, ak4642_of_match);
 603
 604 static const struct i2c_device_id ak4642_i2c_id[] = {
 605         { "ak4642", (kernel_ulong_t)&ak4642_drvdata },
 606         { "ak4643", (kernel_ulong_t)&ak4643_drvdata },
 607         { "ak4648", (kernel_ulong_t)&ak4648_drvdata },
 608         { }
 609 };
 610 MODULE_DEVICE_TABLE(i2c, ak4642_i2c_id);
 611
 612 static struct i2c_driver ak4642_i2c_driver = {
 613         .driver = {
 614                 .name = "ak4642-codec",
 615                 .owner = THIS_MODULE,
 616                 .of_match_table = ak4642_of_match,
 617         },
 618         .probe          = ak4642_i2c_probe,
 619         .remove         = ak4642_i2c_remove,
 620         .id_table       = ak4642_i2c_id,
 621 };
 622
 623 module_i2c_driver(ak4642_i2c_driver);
 624
 625 MODULE_DESCRIPTION("Soc AK4642 driver");
 626 MODULE_AUTHOR("Kuninori Morimoto <morimoto.kuninori@renesas.com>");
 627 MODULE_LICENSE("GPL");