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