sound/soc/codecs/wm8741.c

   1 /*
   2  * wm8741.c  --  WM8741 ALSA SoC Audio driver
   3  *
   4  * Copyright 2010-1 Wolfson Microelectronics plc
   5  *
   6  * Author: Ian Lartey <ian@opensource.wolfsonmicro.com>
   7  *
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  */
  13
  14 #include <linux/module.h>
  15 #include <linux/moduleparam.h>
  16 #include <linux/init.h>
  17 #include <linux/delay.h>
  18 #include <linux/pm.h>
  19 #include <linux/i2c.h>
  20 #include <linux/spi/spi.h>
  21 #include <linux/regmap.h>
  22 #include <linux/regulator/consumer.h>
  23 #include <linux/slab.h>
  24 #include <linux/of_device.h>
  25 #include <sound/core.h>
  26 #include <sound/pcm.h>
  27 #include <sound/pcm_params.h>
  28 #include <sound/soc.h>
  29 #include <sound/initval.h>
  30 #include <sound/tlv.h>
  31
  32 #include "wm8741.h"
  33
  34 #define WM8741_NUM_SUPPLIES 2
  35 static const char *wm8741_supply_names[WM8741_NUM_SUPPLIES] = {
  36         "AVDD",
  37         "DVDD",
  38 };
  39
  40 #define WM8741_NUM_RATES 6
  41
  42 /* codec private data */
  43 struct wm8741_priv {
  44         struct wm8741_platform_data pdata;
  45         struct regmap *regmap;
  46         struct regulator_bulk_data supplies[WM8741_NUM_SUPPLIES];
  47         unsigned int sysclk;
  48         const struct snd_pcm_hw_constraint_list *sysclk_constraints;
  49 };
  50
  51 static const struct reg_default wm8741_reg_defaults[] = {
  52         {  0, 0x0000 },     /* R0  - DACLLSB Attenuation */
  53         {  1, 0x0000 },     /* R1  - DACLMSB Attenuation */
  54         {  2, 0x0000 },     /* R2  - DACRLSB Attenuation */
  55         {  3, 0x0000 },     /* R3  - DACRMSB Attenuation */
  56         {  4, 0x0000 },     /* R4  - Volume Control */
  57         {  5, 0x000A },     /* R5  - Format Control */
  58         {  6, 0x0000 },     /* R6  - Filter Control */
  59         {  7, 0x0000 },     /* R7  - Mode Control 1 */
  60         {  8, 0x0002 },     /* R8  - Mode Control 2 */
  61         { 32, 0x0002 },     /* R32 - ADDITONAL_CONTROL_1 */
  62 };
  63
  64 static bool wm8741_readable(struct device *dev, unsigned int reg)
  65 {
  66         switch (reg) {
  67         case WM8741_DACLLSB_ATTENUATION:
  68         case WM8741_DACLMSB_ATTENUATION:
  69         case WM8741_DACRLSB_ATTENUATION:
  70         case WM8741_DACRMSB_ATTENUATION:
  71         case WM8741_VOLUME_CONTROL:
  72         case WM8741_FORMAT_CONTROL:
  73         case WM8741_FILTER_CONTROL:
  74         case WM8741_MODE_CONTROL_1:
  75         case WM8741_MODE_CONTROL_2:
  76         case WM8741_ADDITIONAL_CONTROL_1:
  77                 return true;
  78         default:
  79                 return false;
  80         }
  81 }
  82
  83 static int wm8741_reset(struct snd_soc_codec *codec)
  84 {
  85         return snd_soc_write(codec, WM8741_RESET, 0);
  86 }
  87
  88 static const DECLARE_TLV_DB_SCALE(dac_tlv_fine, -12700, 13, 0);
  89 static const DECLARE_TLV_DB_SCALE(dac_tlv, -12700, 400, 0);
  90
  91 static const struct snd_kcontrol_new wm8741_snd_controls_stereo[] = {
  92 SOC_DOUBLE_R_TLV("Fine Playback Volume", WM8741_DACLLSB_ATTENUATION,
  93                  WM8741_DACRLSB_ATTENUATION, 1, 255, 1, dac_tlv_fine),
  94 SOC_DOUBLE_R_TLV("Playback Volume", WM8741_DACLMSB_ATTENUATION,
  95                  WM8741_DACRMSB_ATTENUATION, 0, 511, 1, dac_tlv),
  96 };
  97
  98 static const struct snd_kcontrol_new wm8741_snd_controls_mono_left[] = {
  99 SOC_SINGLE_TLV("Fine Playback Volume", WM8741_DACLLSB_ATTENUATION,
 100                  1, 255, 1, dac_tlv_fine),
 101 SOC_SINGLE_TLV("Playback Volume", WM8741_DACLMSB_ATTENUATION,
 102                  0, 511, 1, dac_tlv),
 103 };
 104
 105 static const struct snd_kcontrol_new wm8741_snd_controls_mono_right[] = {
 106 SOC_SINGLE_TLV("Fine Playback Volume", WM8741_DACRLSB_ATTENUATION,
 107                 1, 255, 1, dac_tlv_fine),
 108 SOC_SINGLE_TLV("Playback Volume", WM8741_DACRMSB_ATTENUATION,
 109                 0, 511, 1, dac_tlv),
 110 };
 111
 112 static const struct snd_soc_dapm_widget wm8741_dapm_widgets[] = {
 113 SND_SOC_DAPM_DAC("DACL", "Playback", SND_SOC_NOPM, 0, 0),
 114 SND_SOC_DAPM_DAC("DACR", "Playback", SND_SOC_NOPM, 0, 0),
 115 SND_SOC_DAPM_OUTPUT("VOUTLP"),
 116 SND_SOC_DAPM_OUTPUT("VOUTLN"),
 117 SND_SOC_DAPM_OUTPUT("VOUTRP"),
 118 SND_SOC_DAPM_OUTPUT("VOUTRN"),
 119 };
 120
 121 static const struct snd_soc_dapm_route wm8741_dapm_routes[] = {
 122         { "VOUTLP", NULL, "DACL" },
 123         { "VOUTLN", NULL, "DACL" },
 124         { "VOUTRP", NULL, "DACR" },
 125         { "VOUTRN", NULL, "DACR" },
 126 };
 127
 128 static const unsigned int rates_11289[] = {
 129         44100, 88200,
 130 };
 131
 132 static const struct snd_pcm_hw_constraint_list constraints_11289 = {
 133         .count  = ARRAY_SIZE(rates_11289),
 134         .list   = rates_11289,
 135 };
 136
 137 static const unsigned int rates_12288[] = {
 138         32000, 48000, 96000,
 139 };
 140
 141 static const struct snd_pcm_hw_constraint_list constraints_12288 = {
 142         .count  = ARRAY_SIZE(rates_12288),
 143         .list   = rates_12288,
 144 };
 145
 146 static const unsigned int rates_16384[] = {
 147         32000,
 148 };
 149
 150 static const struct snd_pcm_hw_constraint_list constraints_16384 = {
 151         .count  = ARRAY_SIZE(rates_16384),
 152         .list   = rates_16384,
 153 };
 154
 155 static const unsigned int rates_16934[] = {
 156         44100, 88200,
 157 };
 158
 159 static const struct snd_pcm_hw_constraint_list constraints_16934 = {
 160         .count  = ARRAY_SIZE(rates_16934),
 161         .list   = rates_16934,
 162 };
 163
 164 static const unsigned int rates_18432[] = {
 165         48000, 96000,
 166 };
 167
 168 static const struct snd_pcm_hw_constraint_list constraints_18432 = {
 169         .count  = ARRAY_SIZE(rates_18432),
 170         .list   = rates_18432,
 171 };
 172
 173 static const unsigned int rates_22579[] = {
 174         44100, 88200, 176400
 175 };
 176
 177 static const struct snd_pcm_hw_constraint_list constraints_22579 = {
 178         .count  = ARRAY_SIZE(rates_22579),
 179         .list   = rates_22579,
 180 };
 181
 182 static const unsigned int rates_24576[] = {
 183         32000, 48000, 96000, 192000
 184 };
 185
 186 static const struct snd_pcm_hw_constraint_list constraints_24576 = {
 187         .count  = ARRAY_SIZE(rates_24576),
 188         .list   = rates_24576,
 189 };
 190
 191 static const unsigned int rates_36864[] = {
 192         48000, 96000, 192000
 193 };
 194
 195 static const struct snd_pcm_hw_constraint_list constraints_36864 = {
 196         .count  = ARRAY_SIZE(rates_36864),
 197         .list   = rates_36864,
 198 };
 199
 200 static int wm8741_startup(struct snd_pcm_substream *substream,
 201                           struct snd_soc_dai *dai)
 202 {
 203         struct snd_soc_codec *codec = dai->codec;
 204         struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
 205
 206         if (wm8741->sysclk)
 207                 snd_pcm_hw_constraint_list(substream->runtime, 0,
 208                                 SNDRV_PCM_HW_PARAM_RATE,
 209                                 wm8741->sysclk_constraints);
 210
 211         return 0;
 212 }
 213
 214 static int wm8741_hw_params(struct snd_pcm_substream *substream,
 215                             struct snd_pcm_hw_params *params,
 216                             struct snd_soc_dai *dai)
 217 {
 218         struct snd_soc_codec *codec = dai->codec;
 219         struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
 220         u16 iface = snd_soc_read(codec, WM8741_FORMAT_CONTROL) & 0x1FC;
 221         int i;
 222
 223         /* The set of sample rates that can be supported depends on the
 224          * MCLK supplied to the CODEC - enforce this.
 225          */
 226         if (!wm8741->sysclk) {
 227                 dev_err(codec->dev,
 228                         "No MCLK configured, call set_sysclk() on init or in hw_params\n");
 229                 return -EINVAL;
 230         }
 231
 232         /* Find a supported LRCLK rate */
 233         for (i = 0; i < wm8741->sysclk_constraints->count; i++) {
 234                 if (wm8741->sysclk_constraints->list[i] == params_rate(params))
 235                         break;
 236         }
 237
 238         if (i == wm8741->sysclk_constraints->count) {
 239                 dev_err(codec->dev, "LRCLK %d unsupported with MCLK %d\n",
 240                         params_rate(params), wm8741->sysclk);
 241                 return -EINVAL;
 242         }
 243
 244         /* bit size */
 245         switch (params_width(params)) {
 246         case 16:
 247                 break;
 248         case 20:
 249                 iface |= 0x0001;
 250                 break;
 251         case 24:
 252                 iface |= 0x0002;
 253                 break;
 254         case 32:
 255                 iface |= 0x0003;
 256                 break;
 257         default:
 258                 dev_dbg(codec->dev, "wm8741_hw_params:    Unsupported bit size param = %d",
 259                         params_width(params));
 260                 return -EINVAL;
 261         }
 262
 263         dev_dbg(codec->dev, "wm8741_hw_params:    bit size param = %d, rate param = %d",
 264                 params_width(params), params_rate(params));
 265
 266         snd_soc_write(codec, WM8741_FORMAT_CONTROL, iface);
 267         return 0;
 268 }
 269
 270 static int wm8741_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 271                 int clk_id, unsigned int freq, int dir)
 272 {
 273         struct snd_soc_codec *codec = codec_dai->codec;
 274         struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
 275
 276         dev_dbg(codec->dev, "wm8741_set_dai_sysclk info: freq=%dHz\n", freq);
 277
 278         switch (freq) {
 279         case 0:
 280                 wm8741->sysclk_constraints = NULL;
 281                 wm8741->sysclk = freq;
 282                 return 0;
 283
 284         case 11289600:
 285                 wm8741->sysclk_constraints = &constraints_11289;
 286                 wm8741->sysclk = freq;
 287                 return 0;
 288
 289         case 12288000:
 290                 wm8741->sysclk_constraints = &constraints_12288;
 291                 wm8741->sysclk = freq;
 292                 return 0;
 293
 294         case 16384000:
 295                 wm8741->sysclk_constraints = &constraints_16384;
 296                 wm8741->sysclk = freq;
 297                 return 0;
 298
 299         case 16934400:
 300                 wm8741->sysclk_constraints = &constraints_16934;
 301                 wm8741->sysclk = freq;
 302                 return 0;
 303
 304         case 18432000:
 305                 wm8741->sysclk_constraints = &constraints_18432;
 306                 wm8741->sysclk = freq;
 307                 return 0;
 308
 309         case 22579200:
 310         case 33868800:
 311                 wm8741->sysclk_constraints = &constraints_22579;
 312                 wm8741->sysclk = freq;
 313                 return 0;
 314
 315         case 24576000:
 316                 wm8741->sysclk_constraints = &constraints_24576;
 317                 wm8741->sysclk = freq;
 318                 return 0;
 319
 320         case 36864000:
 321                 wm8741->sysclk_constraints = &constraints_36864;
 322                 wm8741->sysclk = freq;
 323                 return 0;
 324         }
 325         return -EINVAL;
 326 }
 327
 328 static int wm8741_set_dai_fmt(struct snd_soc_dai *codec_dai,
 329                 unsigned int fmt)
 330 {
 331         struct snd_soc_codec *codec = codec_dai->codec;
 332         u16 iface = snd_soc_read(codec, WM8741_FORMAT_CONTROL) & 0x1C3;
 333
 334         /* check master/slave audio interface */
 335         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 336         case SND_SOC_DAIFMT_CBS_CFS:
 337                 break;
 338         default:
 339                 return -EINVAL;
 340         }
 341
 342         /* interface format */
 343         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 344         case SND_SOC_DAIFMT_I2S:
 345                 iface |= 0x0008;
 346                 break;
 347         case SND_SOC_DAIFMT_RIGHT_J:
 348                 break;
 349         case SND_SOC_DAIFMT_LEFT_J:
 350                 iface |= 0x0004;
 351                 break;
 352         case SND_SOC_DAIFMT_DSP_A:
 353                 iface |= 0x000C;
 354                 break;
 355         case SND_SOC_DAIFMT_DSP_B:
 356                 iface |= 0x001C;
 357                 break;
 358         default:
 359                 return -EINVAL;
 360         }
 361
 362         /* clock inversion */
 363         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 364         case SND_SOC_DAIFMT_NB_NF:
 365                 break;
 366         case SND_SOC_DAIFMT_IB_IF:
 367                 iface |= 0x0010;
 368                 break;
 369         case SND_SOC_DAIFMT_IB_NF:
 370                 iface |= 0x0020;
 371                 break;
 372         case SND_SOC_DAIFMT_NB_IF:
 373                 iface |= 0x0030;
 374                 break;
 375         default:
 376                 return -EINVAL;
 377         }
 378
 379
 380         dev_dbg(codec->dev, "wm8741_set_dai_fmt:    Format=%x, Clock Inv=%x\n",
 381                                 fmt & SND_SOC_DAIFMT_FORMAT_MASK,
 382                                 ((fmt & SND_SOC_DAIFMT_INV_MASK)));
 383
 384         snd_soc_write(codec, WM8741_FORMAT_CONTROL, iface);
 385         return 0;
 386 }
 387
 388 #define WM8741_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
 389                         SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | \
 390                         SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 | \
 391                         SNDRV_PCM_RATE_192000)
 392
 393 #define WM8741_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
 394                         SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
 395
 396 static const struct snd_soc_dai_ops wm8741_dai_ops = {
 397         .startup        = wm8741_startup,
 398         .hw_params      = wm8741_hw_params,
 399         .set_sysclk     = wm8741_set_dai_sysclk,
 400         .set_fmt        = wm8741_set_dai_fmt,
 401 };
 402
 403 static struct snd_soc_dai_driver wm8741_dai = {
 404         .name = "wm8741",
 405         .playback = {
 406                 .stream_name = "Playback",
 407                 .channels_min = 2,
 408                 .channels_max = 2,
 409                 .rates = WM8741_RATES,
 410                 .formats = WM8741_FORMATS,
 411         },
 412         .ops = &wm8741_dai_ops,
 413 };
 414
 415 #ifdef CONFIG_PM
 416 static int wm8741_resume(struct snd_soc_codec *codec)
 417 {
 418         snd_soc_cache_sync(codec);
 419         return 0;
 420 }
 421 #else
 422 #define wm8741_resume NULL
 423 #endif
 424
 425 static int wm8741_configure(struct snd_soc_codec *codec)
 426 {
 427         struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
 428
 429         /* Configure differential mode */
 430         switch (wm8741->pdata.diff_mode) {
 431         case WM8741_DIFF_MODE_STEREO:
 432         case WM8741_DIFF_MODE_STEREO_REVERSED:
 433         case WM8741_DIFF_MODE_MONO_LEFT:
 434         case WM8741_DIFF_MODE_MONO_RIGHT:
 435                 snd_soc_update_bits(codec, WM8741_MODE_CONTROL_2,
 436                                 WM8741_DIFF_MASK,
 437                                 wm8741->pdata.diff_mode << WM8741_DIFF_SHIFT);
 438                 break;
 439         default:
 440                 return -EINVAL;
 441         }
 442
 443         /* Change some default settings - latch VU */
 444         snd_soc_update_bits(codec, WM8741_DACLLSB_ATTENUATION,
 445                         WM8741_UPDATELL, WM8741_UPDATELL);
 446         snd_soc_update_bits(codec, WM8741_DACLMSB_ATTENUATION,
 447                         WM8741_UPDATELM, WM8741_UPDATELM);
 448         snd_soc_update_bits(codec, WM8741_DACRLSB_ATTENUATION,
 449                         WM8741_UPDATERL, WM8741_UPDATERL);
 450         snd_soc_update_bits(codec, WM8741_DACRMSB_ATTENUATION,
 451                         WM8741_UPDATERM, WM8741_UPDATERM);
 452
 453         return 0;
 454 }
 455
 456 static int wm8741_add_controls(struct snd_soc_codec *codec)
 457 {
 458         struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
 459
 460         switch (wm8741->pdata.diff_mode) {
 461         case WM8741_DIFF_MODE_STEREO:
 462         case WM8741_DIFF_MODE_STEREO_REVERSED:
 463                 snd_soc_add_codec_controls(codec,
 464                                 wm8741_snd_controls_stereo,
 465                                 ARRAY_SIZE(wm8741_snd_controls_stereo));
 466                 break;
 467         case WM8741_DIFF_MODE_MONO_LEFT:
 468                 snd_soc_add_codec_controls(codec,
 469                                 wm8741_snd_controls_mono_left,
 470                                 ARRAY_SIZE(wm8741_snd_controls_mono_left));
 471                 break;
 472         case WM8741_DIFF_MODE_MONO_RIGHT:
 473                 snd_soc_add_codec_controls(codec,
 474                                 wm8741_snd_controls_mono_right,
 475                                 ARRAY_SIZE(wm8741_snd_controls_mono_right));
 476                 break;
 477         default:
 478                 return -EINVAL;
 479         }
 480
 481         return 0;
 482 }
 483
 484 static int wm8741_probe(struct snd_soc_codec *codec)
 485 {
 486         struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
 487         int ret = 0;
 488
 489         ret = regulator_bulk_enable(ARRAY_SIZE(wm8741->supplies),
 490                                     wm8741->supplies);
 491         if (ret != 0) {
 492                 dev_err(codec->dev, "Failed to enable supplies: %d\n", ret);
 493                 goto err_get;
 494         }
 495
 496         ret = wm8741_reset(codec);
 497         if (ret < 0) {
 498                 dev_err(codec->dev, "Failed to issue reset\n");
 499                 goto err_enable;
 500         }
 501
 502         ret = wm8741_configure(codec);
 503         if (ret < 0) {
 504                 dev_err(codec->dev, "Failed to change default settings\n");
 505                 goto err_enable;
 506         }
 507
 508         ret = wm8741_add_controls(codec);
 509         if (ret < 0) {
 510                 dev_err(codec->dev, "Failed to add controls\n");
 511                 goto err_enable;
 512         }
 513
 514         dev_dbg(codec->dev, "Successful registration\n");
 515         return ret;
 516
 517 err_enable:
 518         regulator_bulk_disable(ARRAY_SIZE(wm8741->supplies), wm8741->supplies);
 519 err_get:
 520         return ret;
 521 }
 522
 523 static int wm8741_remove(struct snd_soc_codec *codec)
 524 {
 525         struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
 526
 527         regulator_bulk_disable(ARRAY_SIZE(wm8741->supplies), wm8741->supplies);
 528
 529         return 0;
 530 }
 531
 532 static struct snd_soc_codec_driver soc_codec_dev_wm8741 = {
 533         .probe =        wm8741_probe,
 534         .remove =       wm8741_remove,
 535         .resume =       wm8741_resume,
 536
 537         .dapm_widgets = wm8741_dapm_widgets,
 538         .num_dapm_widgets = ARRAY_SIZE(wm8741_dapm_widgets),
 539         .dapm_routes = wm8741_dapm_routes,
 540         .num_dapm_routes = ARRAY_SIZE(wm8741_dapm_routes),
 541 };
 542
 543 static const struct of_device_id wm8741_of_match[] = {
 544         { .compatible = "wlf,wm8741", },
 545         { }
 546 };
 547 MODULE_DEVICE_TABLE(of, wm8741_of_match);
 548
 549 static const struct regmap_config wm8741_regmap = {
 550         .reg_bits = 7,
 551         .val_bits = 9,
 552         .max_register = WM8741_MAX_REGISTER,
 553
 554         .reg_defaults = wm8741_reg_defaults,
 555         .num_reg_defaults = ARRAY_SIZE(wm8741_reg_defaults),
 556         .cache_type = REGCACHE_RBTREE,
 557
 558         .readable_reg = wm8741_readable,
 559 };
 560
 561 static int wm8741_set_pdata(struct device *dev, struct wm8741_priv *wm8741)
 562 {
 563         const struct wm8741_platform_data *pdata = dev_get_platdata(dev);
 564         u32 diff_mode;
 565
 566         if (dev->of_node) {
 567                 if (of_property_read_u32(dev->of_node, "diff-mode", &diff_mode)
 568                                 >= 0)
 569                         wm8741->pdata.diff_mode = diff_mode;
 570         } else {
 571                 if (pdata != NULL)
 572                         memcpy(&wm8741->pdata, pdata, sizeof(wm8741->pdata));
 573         }
 574
 575         return 0;
 576 }
 577
 578 #if IS_ENABLED(CONFIG_I2C)
 579 static int wm8741_i2c_probe(struct i2c_client *i2c,
 580                             const struct i2c_device_id *id)
 581 {
 582         struct wm8741_priv *wm8741;
 583         int ret, i;
 584
 585         wm8741 = devm_kzalloc(&i2c->dev, sizeof(struct wm8741_priv),
 586                               GFP_KERNEL);
 587         if (wm8741 == NULL)
 588                 return -ENOMEM;
 589
 590         for (i = 0; i < ARRAY_SIZE(wm8741->supplies); i++)
 591                 wm8741->supplies[i].supply = wm8741_supply_names[i];
 592
 593         ret = devm_regulator_bulk_get(&i2c->dev, ARRAY_SIZE(wm8741->supplies),
 594                                       wm8741->supplies);
 595         if (ret != 0) {
 596                 dev_err(&i2c->dev, "Failed to request supplies: %d\n", ret);
 597                 return ret;
 598         }
 599
 600         wm8741->regmap = devm_regmap_init_i2c(i2c, &wm8741_regmap);
 601         if (IS_ERR(wm8741->regmap)) {
 602                 ret = PTR_ERR(wm8741->regmap);
 603                 dev_err(&i2c->dev, "Failed to init regmap: %d\n", ret);
 604                 return ret;
 605         }
 606
 607         ret = wm8741_set_pdata(&i2c->dev, wm8741);
 608         if (ret != 0) {
 609                 dev_err(&i2c->dev, "Failed to set pdata: %d\n", ret);
 610                 return ret;
 611         }
 612
 613         i2c_set_clientdata(i2c, wm8741);
 614
 615         ret = snd_soc_register_codec(&i2c->dev,
 616                                      &soc_codec_dev_wm8741, &wm8741_dai, 1);
 617
 618         return ret;
 619 }
 620
 621 static int wm8741_i2c_remove(struct i2c_client *client)
 622 {
 623         snd_soc_unregister_codec(&client->dev);
 624         return 0;
 625 }
 626
 627 static const struct i2c_device_id wm8741_i2c_id[] = {
 628         { "wm8741", 0 },
 629         { }
 630 };
 631 MODULE_DEVICE_TABLE(i2c, wm8741_i2c_id);
 632
 633 static struct i2c_driver wm8741_i2c_driver = {
 634         .driver = {
 635                 .name = "wm8741",
 636                 .owner = THIS_MODULE,
 637                 .of_match_table = wm8741_of_match,
 638         },
 639         .probe =    wm8741_i2c_probe,
 640         .remove =   wm8741_i2c_remove,
 641         .id_table = wm8741_i2c_id,
 642 };
 643 #endif
 644
 645 #if defined(CONFIG_SPI_MASTER)
 646 static int wm8741_spi_probe(struct spi_device *spi)
 647 {
 648         struct wm8741_priv *wm8741;
 649         int ret, i;
 650
 651         wm8741 = devm_kzalloc(&spi->dev, sizeof(struct wm8741_priv),
 652                              GFP_KERNEL);
 653         if (wm8741 == NULL)
 654                 return -ENOMEM;
 655
 656         for (i = 0; i < ARRAY_SIZE(wm8741->supplies); i++)
 657                 wm8741->supplies[i].supply = wm8741_supply_names[i];
 658
 659         ret = devm_regulator_bulk_get(&spi->dev, ARRAY_SIZE(wm8741->supplies),
 660                                       wm8741->supplies);
 661         if (ret != 0) {
 662                 dev_err(&spi->dev, "Failed to request supplies: %d\n", ret);
 663                 return ret;
 664         }
 665
 666         wm8741->regmap = devm_regmap_init_spi(spi, &wm8741_regmap);
 667         if (IS_ERR(wm8741->regmap)) {
 668                 ret = PTR_ERR(wm8741->regmap);
 669                 dev_err(&spi->dev, "Failed to init regmap: %d\n", ret);
 670                 return ret;
 671         }
 672
 673         ret = wm8741_set_pdata(&spi->dev, wm8741);
 674         if (ret != 0) {
 675                 dev_err(&spi->dev, "Failed to set pdata: %d\n", ret);
 676                 return ret;
 677         }
 678
 679         spi_set_drvdata(spi, wm8741);
 680
 681         ret = snd_soc_register_codec(&spi->dev,
 682                         &soc_codec_dev_wm8741, &wm8741_dai, 1);
 683         return ret;
 684 }
 685
 686 static int wm8741_spi_remove(struct spi_device *spi)
 687 {
 688         snd_soc_unregister_codec(&spi->dev);
 689         return 0;
 690 }
 691
 692 static struct spi_driver wm8741_spi_driver = {
 693         .driver = {
 694                 .name   = "wm8741",
 695                 .owner  = THIS_MODULE,
 696                 .of_match_table = wm8741_of_match,
 697         },
 698         .probe          = wm8741_spi_probe,
 699         .remove         = wm8741_spi_remove,
 700 };
 701 #endif /* CONFIG_SPI_MASTER */
 702
 703 static int __init wm8741_modinit(void)
 704 {
 705         int ret = 0;
 706
 707 #if IS_ENABLED(CONFIG_I2C)
 708         ret = i2c_add_driver(&wm8741_i2c_driver);
 709         if (ret != 0)
 710                 pr_err("Failed to register WM8741 I2C driver: %d\n", ret);
 711 #endif
 712 #if defined(CONFIG_SPI_MASTER)
 713         ret = spi_register_driver(&wm8741_spi_driver);
 714         if (ret != 0) {
 715                 printk(KERN_ERR "Failed to register wm8741 SPI driver: %d\n",
 716                        ret);
 717         }
 718 #endif
 719
 720         return ret;
 721 }
 722 module_init(wm8741_modinit);
 723
 724 static void __exit wm8741_exit(void)
 725 {
 726 #if defined(CONFIG_SPI_MASTER)
 727         spi_unregister_driver(&wm8741_spi_driver);
 728 #endif
 729 #if IS_ENABLED(CONFIG_I2C)
 730         i2c_del_driver(&wm8741_i2c_driver);
 731 #endif
 732 }
 733 module_exit(wm8741_exit);
 734
 735 MODULE_DESCRIPTION("ASoC WM8741 driver");
 736 MODULE_AUTHOR("Ian Lartey <ian@opensource.wolfsonmicro.com>");
 737 MODULE_LICENSE("GPL");