codecs/wm8741.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * wm8741.c  --  WM8741 ALSA SoC Audio driver
   4  *
   5  * Copyright 2010-1 Wolfson Microelectronics plc
   6  *
   7  * Author: Ian Lartey <ian@opensource.wolfsonmicro.com>
   8  */
   9
  10 #include <linux/module.h>
  11 #include <linux/moduleparam.h>
  12 #include <linux/init.h>
  13 #include <linux/delay.h>
  14 #include <linux/pm.h>
  15 #include <linux/i2c.h>
  16 #include <linux/spi/spi.h>
  17 #include <linux/regmap.h>
  18 #include <linux/regulator/consumer.h>
  19 #include <linux/slab.h>
  20 #include <linux/of_device.h>
  21 #include <sound/core.h>
  22 #include <sound/pcm.h>
  23 #include <sound/pcm_params.h>
  24 #include <sound/soc.h>
  25 #include <sound/initval.h>
  26 #include <sound/tlv.h>
  27
  28 #include "wm8741.h"
  29
  30 #define WM8741_NUM_SUPPLIES 2
  31 static const char *wm8741_supply_names[WM8741_NUM_SUPPLIES] = {
  32         "AVDD",
  33         "DVDD",
  34 };
  35
  36 /* codec private data */
  37 struct wm8741_priv {
  38         struct wm8741_platform_data pdata;
  39         struct regmap *regmap;
  40         struct regulator_bulk_data supplies[WM8741_NUM_SUPPLIES];
  41         unsigned int sysclk;
  42         const struct snd_pcm_hw_constraint_list *sysclk_constraints;
  43 };
  44
  45 static const struct reg_default wm8741_reg_defaults[] = {
  46         {  0, 0x0000 },     /* R0  - DACLLSB Attenuation */
  47         {  1, 0x0000 },     /* R1  - DACLMSB Attenuation */
  48         {  2, 0x0000 },     /* R2  - DACRLSB Attenuation */
  49         {  3, 0x0000 },     /* R3  - DACRMSB Attenuation */
  50         {  4, 0x0000 },     /* R4  - Volume Control */
  51         {  5, 0x000A },     /* R5  - Format Control */
  52         {  6, 0x0000 },     /* R6  - Filter Control */
  53         {  7, 0x0000 },     /* R7  - Mode Control 1 */
  54         {  8, 0x0002 },     /* R8  - Mode Control 2 */
  55         { 32, 0x0002 },     /* R32 - ADDITONAL_CONTROL_1 */
  56 };
  57
  58 static int wm8741_reset(struct snd_soc_component *component)
  59 {
  60         return snd_soc_component_write(component, WM8741_RESET, 0);
  61 }
  62
  63 static const DECLARE_TLV_DB_SCALE(dac_tlv_fine, -12700, 13, 0);
  64 static const DECLARE_TLV_DB_SCALE(dac_tlv, -12700, 400, 0);
  65
  66 static const struct snd_kcontrol_new wm8741_snd_controls_stereo[] = {
  67 SOC_DOUBLE_R_TLV("Fine Playback Volume", WM8741_DACLLSB_ATTENUATION,
  68                  WM8741_DACRLSB_ATTENUATION, 1, 255, 1, dac_tlv_fine),
  69 SOC_DOUBLE_R_TLV("Playback Volume", WM8741_DACLMSB_ATTENUATION,
  70                  WM8741_DACRMSB_ATTENUATION, 0, 511, 1, dac_tlv),
  71 };
  72
  73 static const struct snd_kcontrol_new wm8741_snd_controls_mono_left[] = {
  74 SOC_SINGLE_TLV("Fine Playback Volume", WM8741_DACLLSB_ATTENUATION,
  75                  1, 255, 1, dac_tlv_fine),
  76 SOC_SINGLE_TLV("Playback Volume", WM8741_DACLMSB_ATTENUATION,
  77                  0, 511, 1, dac_tlv),
  78 };
  79
  80 static const struct snd_kcontrol_new wm8741_snd_controls_mono_right[] = {
  81 SOC_SINGLE_TLV("Fine Playback Volume", WM8741_DACRLSB_ATTENUATION,
  82                 1, 255, 1, dac_tlv_fine),
  83 SOC_SINGLE_TLV("Playback Volume", WM8741_DACRMSB_ATTENUATION,
  84                 0, 511, 1, dac_tlv),
  85 };
  86
  87 static const struct snd_soc_dapm_widget wm8741_dapm_widgets[] = {
  88 SND_SOC_DAPM_DAC("DACL", "Playback", SND_SOC_NOPM, 0, 0),
  89 SND_SOC_DAPM_DAC("DACR", "Playback", SND_SOC_NOPM, 0, 0),
  90 SND_SOC_DAPM_OUTPUT("VOUTLP"),
  91 SND_SOC_DAPM_OUTPUT("VOUTLN"),
  92 SND_SOC_DAPM_OUTPUT("VOUTRP"),
  93 SND_SOC_DAPM_OUTPUT("VOUTRN"),
  94 };
  95
  96 static const struct snd_soc_dapm_route wm8741_dapm_routes[] = {
  97         { "VOUTLP", NULL, "DACL" },
  98         { "VOUTLN", NULL, "DACL" },
  99         { "VOUTRP", NULL, "DACR" },
 100         { "VOUTRN", NULL, "DACR" },
 101 };
 102
 103 static const unsigned int rates_11289[] = {
 104         44100, 88200,
 105 };
 106
 107 static const struct snd_pcm_hw_constraint_list constraints_11289 = {
 108         .count  = ARRAY_SIZE(rates_11289),
 109         .list   = rates_11289,
 110 };
 111
 112 static const unsigned int rates_12288[] = {
 113         32000, 48000, 96000,
 114 };
 115
 116 static const struct snd_pcm_hw_constraint_list constraints_12288 = {
 117         .count  = ARRAY_SIZE(rates_12288),
 118         .list   = rates_12288,
 119 };
 120
 121 static const unsigned int rates_16384[] = {
 122         32000,
 123 };
 124
 125 static const struct snd_pcm_hw_constraint_list constraints_16384 = {
 126         .count  = ARRAY_SIZE(rates_16384),
 127         .list   = rates_16384,
 128 };
 129
 130 static const unsigned int rates_16934[] = {
 131         44100, 88200,
 132 };
 133
 134 static const struct snd_pcm_hw_constraint_list constraints_16934 = {
 135         .count  = ARRAY_SIZE(rates_16934),
 136         .list   = rates_16934,
 137 };
 138
 139 static const unsigned int rates_18432[] = {
 140         48000, 96000,
 141 };
 142
 143 static const struct snd_pcm_hw_constraint_list constraints_18432 = {
 144         .count  = ARRAY_SIZE(rates_18432),
 145         .list   = rates_18432,
 146 };
 147
 148 static const unsigned int rates_22579[] = {
 149         44100, 88200, 176400
 150 };
 151
 152 static const struct snd_pcm_hw_constraint_list constraints_22579 = {
 153         .count  = ARRAY_SIZE(rates_22579),
 154         .list   = rates_22579,
 155 };
 156
 157 static const unsigned int rates_24576[] = {
 158         32000, 48000, 96000, 192000
 159 };
 160
 161 static const struct snd_pcm_hw_constraint_list constraints_24576 = {
 162         .count  = ARRAY_SIZE(rates_24576),
 163         .list   = rates_24576,
 164 };
 165
 166 static const unsigned int rates_36864[] = {
 167         48000, 96000, 192000
 168 };
 169
 170 static const struct snd_pcm_hw_constraint_list constraints_36864 = {
 171         .count  = ARRAY_SIZE(rates_36864),
 172         .list   = rates_36864,
 173 };
 174
 175 static int wm8741_startup(struct snd_pcm_substream *substream,
 176                           struct snd_soc_dai *dai)
 177 {
 178         struct snd_soc_component *component = dai->component;
 179         struct wm8741_priv *wm8741 = snd_soc_component_get_drvdata(component);
 180
 181         if (wm8741->sysclk)
 182                 snd_pcm_hw_constraint_list(substream->runtime, 0,
 183                                 SNDRV_PCM_HW_PARAM_RATE,
 184                                 wm8741->sysclk_constraints);
 185
 186         return 0;
 187 }
 188
 189 static int wm8741_hw_params(struct snd_pcm_substream *substream,
 190                             struct snd_pcm_hw_params *params,
 191                             struct snd_soc_dai *dai)
 192 {
 193         struct snd_soc_component *component = dai->component;
 194         struct wm8741_priv *wm8741 = snd_soc_component_get_drvdata(component);
 195         unsigned int iface, mode;
 196         int i;
 197
 198         /* The set of sample rates that can be supported depends on the
 199          * MCLK supplied to the CODEC - enforce this.
 200          */
 201         if (!wm8741->sysclk) {
 202                 dev_err(component->dev,
 203                         "No MCLK configured, call set_sysclk() on init or in hw_params\n");
 204                 return -EINVAL;
 205         }
 206
 207         /* Find a supported LRCLK rate */
 208         for (i = 0; i < wm8741->sysclk_constraints->count; i++) {
 209                 if (wm8741->sysclk_constraints->list[i] == params_rate(params))
 210                         break;
 211         }
 212
 213         if (i == wm8741->sysclk_constraints->count) {
 214                 dev_err(component->dev, "LRCLK %d unsupported with MCLK %d\n",
 215                         params_rate(params), wm8741->sysclk);
 216                 return -EINVAL;
 217         }
 218
 219         /* bit size */
 220         switch (params_width(params)) {
 221         case 16:
 222                 iface = 0x0;
 223                 break;
 224         case 20:
 225                 iface = 0x1;
 226                 break;
 227         case 24:
 228                 iface = 0x2;
 229                 break;
 230         case 32:
 231                 iface = 0x3;
 232                 break;
 233         default:
 234                 dev_dbg(component->dev, "wm8741_hw_params:    Unsupported bit size param = %d",
 235                         params_width(params));
 236                 return -EINVAL;
 237         }
 238
 239         /* oversampling rate */
 240         if (params_rate(params) > 96000)
 241                 mode = 0x40;
 242         else if (params_rate(params) > 48000)
 243                 mode = 0x20;
 244         else
 245                 mode = 0x00;
 246
 247         dev_dbg(component->dev, "wm8741_hw_params:    bit size param = %d, rate param = %d",
 248                 params_width(params), params_rate(params));
 249
 250         snd_soc_component_update_bits(component, WM8741_FORMAT_CONTROL, WM8741_IWL_MASK,
 251                             iface);
 252         snd_soc_component_update_bits(component, WM8741_MODE_CONTROL_1, WM8741_OSR_MASK,
 253                             mode);
 254
 255         return 0;
 256 }
 257
 258 static int wm8741_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 259                 int clk_id, unsigned int freq, int dir)
 260 {
 261         struct snd_soc_component *component = codec_dai->component;
 262         struct wm8741_priv *wm8741 = snd_soc_component_get_drvdata(component);
 263
 264         dev_dbg(component->dev, "wm8741_set_dai_sysclk info: freq=%dHz\n", freq);
 265
 266         switch (freq) {
 267         case 0:
 268                 wm8741->sysclk_constraints = NULL;
 269                 break;
 270         case 11289600:
 271                 wm8741->sysclk_constraints = &constraints_11289;
 272                 break;
 273         case 12288000:
 274                 wm8741->sysclk_constraints = &constraints_12288;
 275                 break;
 276         case 16384000:
 277                 wm8741->sysclk_constraints = &constraints_16384;
 278                 break;
 279         case 16934400:
 280                 wm8741->sysclk_constraints = &constraints_16934;
 281                 break;
 282         case 18432000:
 283                 wm8741->sysclk_constraints = &constraints_18432;
 284                 break;
 285         case 22579200:
 286         case 33868800:
 287                 wm8741->sysclk_constraints = &constraints_22579;
 288                 break;
 289         case 24576000:
 290                 wm8741->sysclk_constraints = &constraints_24576;
 291                 break;
 292         case 36864000:
 293                 wm8741->sysclk_constraints = &constraints_36864;
 294                 break;
 295         default:
 296                 return -EINVAL;
 297         }
 298
 299         wm8741->sysclk = freq;
 300         return 0;
 301 }
 302
 303 static int wm8741_set_dai_fmt(struct snd_soc_dai *codec_dai,
 304                 unsigned int fmt)
 305 {
 306         struct snd_soc_component *component = codec_dai->component;
 307         unsigned int iface;
 308
 309         /* check master/slave audio interface */
 310         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 311         case SND_SOC_DAIFMT_CBS_CFS:
 312                 break;
 313         default:
 314                 return -EINVAL;
 315         }
 316
 317         /* interface format */
 318         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 319         case SND_SOC_DAIFMT_I2S:
 320                 iface = 0x08;
 321                 break;
 322         case SND_SOC_DAIFMT_RIGHT_J:
 323                 iface = 0x00;
 324                 break;
 325         case SND_SOC_DAIFMT_LEFT_J:
 326                 iface = 0x04;
 327                 break;
 328         case SND_SOC_DAIFMT_DSP_A:
 329                 iface = 0x0C;
 330                 break;
 331         case SND_SOC_DAIFMT_DSP_B:
 332                 iface = 0x1C;
 333                 break;
 334         default:
 335                 return -EINVAL;
 336         }
 337
 338         /* clock inversion */
 339         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 340         case SND_SOC_DAIFMT_NB_NF:
 341                 break;
 342         case SND_SOC_DAIFMT_NB_IF:
 343                 iface |= 0x10;
 344                 break;
 345         case SND_SOC_DAIFMT_IB_NF:
 346                 iface |= 0x20;
 347                 break;
 348         case SND_SOC_DAIFMT_IB_IF:
 349                 iface |= 0x30;
 350                 break;
 351         default:
 352                 return -EINVAL;
 353         }
 354
 355
 356         dev_dbg(component->dev, "wm8741_set_dai_fmt:    Format=%x, Clock Inv=%x\n",
 357                                 fmt & SND_SOC_DAIFMT_FORMAT_MASK,
 358                                 ((fmt & SND_SOC_DAIFMT_INV_MASK)));
 359
 360         snd_soc_component_update_bits(component, WM8741_FORMAT_CONTROL,
 361                             WM8741_BCP_MASK | WM8741_LRP_MASK | WM8741_FMT_MASK,
 362                             iface);
 363
 364         return 0;
 365 }
 366
 367 static int wm8741_mute(struct snd_soc_dai *codec_dai, int mute, int direction)
 368 {
 369         struct snd_soc_component *component = codec_dai->component;
 370
 371         snd_soc_component_update_bits(component, WM8741_VOLUME_CONTROL,
 372                         WM8741_SOFT_MASK, !!mute << WM8741_SOFT_SHIFT);
 373         return 0;
 374 }
 375
 376 #define WM8741_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
 377                         SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | \
 378                         SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 | \
 379                         SNDRV_PCM_RATE_192000)
 380
 381 #define WM8741_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
 382                         SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
 383
 384 static const struct snd_soc_dai_ops wm8741_dai_ops = {
 385         .startup        = wm8741_startup,
 386         .hw_params      = wm8741_hw_params,
 387         .set_sysclk     = wm8741_set_dai_sysclk,
 388         .set_fmt        = wm8741_set_dai_fmt,
 389         .mute_stream    = wm8741_mute,
 390         .no_capture_mute = 1,
 391 };
 392
 393 static struct snd_soc_dai_driver wm8741_dai = {
 394         .name = "wm8741",
 395         .playback = {
 396                 .stream_name = "Playback",
 397                 .channels_min = 2,
 398                 .channels_max = 2,
 399                 .rates = WM8741_RATES,
 400                 .formats = WM8741_FORMATS,
 401         },
 402         .ops = &wm8741_dai_ops,
 403 };
 404
 405 #ifdef CONFIG_PM
 406 static int wm8741_resume(struct snd_soc_component *component)
 407 {
 408         snd_soc_component_cache_sync(component);
 409         return 0;
 410 }
 411 #else
 412 #define wm8741_resume NULL
 413 #endif
 414
 415 static int wm8741_configure(struct snd_soc_component *component)
 416 {
 417         struct wm8741_priv *wm8741 = snd_soc_component_get_drvdata(component);
 418
 419         /* Configure differential mode */
 420         switch (wm8741->pdata.diff_mode) {
 421         case WM8741_DIFF_MODE_STEREO:
 422         case WM8741_DIFF_MODE_STEREO_REVERSED:
 423         case WM8741_DIFF_MODE_MONO_LEFT:
 424         case WM8741_DIFF_MODE_MONO_RIGHT:
 425                 snd_soc_component_update_bits(component, WM8741_MODE_CONTROL_2,
 426                                 WM8741_DIFF_MASK,
 427                                 wm8741->pdata.diff_mode << WM8741_DIFF_SHIFT);
 428                 break;
 429         default:
 430                 return -EINVAL;
 431         }
 432
 433         /* Change some default settings - latch VU */
 434         snd_soc_component_update_bits(component, WM8741_DACLLSB_ATTENUATION,
 435                         WM8741_UPDATELL, WM8741_UPDATELL);
 436         snd_soc_component_update_bits(component, WM8741_DACLMSB_ATTENUATION,
 437                         WM8741_UPDATELM, WM8741_UPDATELM);
 438         snd_soc_component_update_bits(component, WM8741_DACRLSB_ATTENUATION,
 439                         WM8741_UPDATERL, WM8741_UPDATERL);
 440         snd_soc_component_update_bits(component, WM8741_DACRMSB_ATTENUATION,
 441                         WM8741_UPDATERM, WM8741_UPDATERM);
 442
 443         return 0;
 444 }
 445
 446 static int wm8741_add_controls(struct snd_soc_component *component)
 447 {
 448         struct wm8741_priv *wm8741 = snd_soc_component_get_drvdata(component);
 449
 450         switch (wm8741->pdata.diff_mode) {
 451         case WM8741_DIFF_MODE_STEREO:
 452         case WM8741_DIFF_MODE_STEREO_REVERSED:
 453                 snd_soc_add_component_controls(component,
 454                                 wm8741_snd_controls_stereo,
 455                                 ARRAY_SIZE(wm8741_snd_controls_stereo));
 456                 break;
 457         case WM8741_DIFF_MODE_MONO_LEFT:
 458                 snd_soc_add_component_controls(component,
 459                                 wm8741_snd_controls_mono_left,
 460                                 ARRAY_SIZE(wm8741_snd_controls_mono_left));
 461                 break;
 462         case WM8741_DIFF_MODE_MONO_RIGHT:
 463                 snd_soc_add_component_controls(component,
 464                                 wm8741_snd_controls_mono_right,
 465                                 ARRAY_SIZE(wm8741_snd_controls_mono_right));
 466                 break;
 467         default:
 468                 return -EINVAL;
 469         }
 470
 471         return 0;
 472 }
 473
 474 static int wm8741_probe(struct snd_soc_component *component)
 475 {
 476         struct wm8741_priv *wm8741 = snd_soc_component_get_drvdata(component);
 477         int ret = 0;
 478
 479         ret = regulator_bulk_enable(ARRAY_SIZE(wm8741->supplies),
 480                                     wm8741->supplies);
 481         if (ret != 0) {
 482                 dev_err(component->dev, "Failed to enable supplies: %d\n", ret);
 483                 goto err_get;
 484         }
 485
 486         ret = wm8741_reset(component);
 487         if (ret < 0) {
 488                 dev_err(component->dev, "Failed to issue reset\n");
 489                 goto err_enable;
 490         }
 491
 492         ret = wm8741_configure(component);
 493         if (ret < 0) {
 494                 dev_err(component->dev, "Failed to change default settings\n");
 495                 goto err_enable;
 496         }
 497
 498         ret = wm8741_add_controls(component);
 499         if (ret < 0) {
 500                 dev_err(component->dev, "Failed to add controls\n");
 501                 goto err_enable;
 502         }
 503
 504         dev_dbg(component->dev, "Successful registration\n");
 505         return ret;
 506
 507 err_enable:
 508         regulator_bulk_disable(ARRAY_SIZE(wm8741->supplies), wm8741->supplies);
 509 err_get:
 510         return ret;
 511 }
 512
 513 static void wm8741_remove(struct snd_soc_component *component)
 514 {
 515         struct wm8741_priv *wm8741 = snd_soc_component_get_drvdata(component);
 516
 517         regulator_bulk_disable(ARRAY_SIZE(wm8741->supplies), wm8741->supplies);
 518 }
 519
 520 static const struct snd_soc_component_driver soc_component_dev_wm8741 = {
 521         .probe                  = wm8741_probe,
 522         .remove                 = wm8741_remove,
 523         .resume                 = wm8741_resume,
 524         .dapm_widgets           = wm8741_dapm_widgets,
 525         .num_dapm_widgets       = ARRAY_SIZE(wm8741_dapm_widgets),
 526         .dapm_routes            = wm8741_dapm_routes,
 527         .num_dapm_routes        = ARRAY_SIZE(wm8741_dapm_routes),
 528         .idle_bias_on           = 1,
 529         .use_pmdown_time        = 1,
 530         .endianness             = 1,
 531 };
 532
 533 static const struct of_device_id wm8741_of_match[] = {
 534         { .compatible = "wlf,wm8741", },
 535         { }
 536 };
 537 MODULE_DEVICE_TABLE(of, wm8741_of_match);
 538
 539 static const struct regmap_config wm8741_regmap = {
 540         .reg_bits = 7,
 541         .val_bits = 9,
 542         .max_register = WM8741_MAX_REGISTER,
 543
 544         .reg_defaults = wm8741_reg_defaults,
 545         .num_reg_defaults = ARRAY_SIZE(wm8741_reg_defaults),
 546         .cache_type = REGCACHE_RBTREE,
 547 };
 548
 549 static int wm8741_set_pdata(struct device *dev, struct wm8741_priv *wm8741)
 550 {
 551         const struct wm8741_platform_data *pdata = dev_get_platdata(dev);
 552         u32 diff_mode;
 553
 554         if (dev->of_node) {
 555                 if (of_property_read_u32(dev->of_node, "diff-mode", &diff_mode)
 556                                 >= 0)
 557                         wm8741->pdata.diff_mode = diff_mode;
 558         } else {
 559                 if (pdata != NULL)
 560                         memcpy(&wm8741->pdata, pdata, sizeof(wm8741->pdata));
 561         }
 562
 563         return 0;
 564 }
 565
 566 #if IS_ENABLED(CONFIG_I2C)
 567 static int wm8741_i2c_probe(struct i2c_client *i2c)
 568 {
 569         struct wm8741_priv *wm8741;
 570         int ret, i;
 571
 572         wm8741 = devm_kzalloc(&i2c->dev, sizeof(struct wm8741_priv),
 573                               GFP_KERNEL);
 574         if (wm8741 == NULL)
 575                 return -ENOMEM;
 576
 577         for (i = 0; i < ARRAY_SIZE(wm8741->supplies); i++)
 578                 wm8741->supplies[i].supply = wm8741_supply_names[i];
 579
 580         ret = devm_regulator_bulk_get(&i2c->dev, ARRAY_SIZE(wm8741->supplies),
 581                                       wm8741->supplies);
 582         if (ret != 0) {
 583                 dev_err(&i2c->dev, "Failed to request supplies: %d\n", ret);
 584                 return ret;
 585         }
 586
 587         wm8741->regmap = devm_regmap_init_i2c(i2c, &wm8741_regmap);
 588         if (IS_ERR(wm8741->regmap)) {
 589                 ret = PTR_ERR(wm8741->regmap);
 590                 dev_err(&i2c->dev, "Failed to init regmap: %d\n", ret);
 591                 return ret;
 592         }
 593
 594         ret = wm8741_set_pdata(&i2c->dev, wm8741);
 595         if (ret != 0) {
 596                 dev_err(&i2c->dev, "Failed to set pdata: %d\n", ret);
 597                 return ret;
 598         }
 599
 600         i2c_set_clientdata(i2c, wm8741);
 601
 602         ret = devm_snd_soc_register_component(&i2c->dev,
 603                                      &soc_component_dev_wm8741, &wm8741_dai, 1);
 604
 605         return ret;
 606 }
 607
 608 static const struct i2c_device_id wm8741_i2c_id[] = {
 609         { "wm8741", 0 },
 610         { }
 611 };
 612 MODULE_DEVICE_TABLE(i2c, wm8741_i2c_id);
 613
 614 static struct i2c_driver wm8741_i2c_driver = {
 615         .driver = {
 616                 .name = "wm8741",
 617                 .of_match_table = wm8741_of_match,
 618         },
 619         .probe_new = wm8741_i2c_probe,
 620         .id_table = wm8741_i2c_id,
 621 };
 622 #endif
 623
 624 #if defined(CONFIG_SPI_MASTER)
 625 static int wm8741_spi_probe(struct spi_device *spi)
 626 {
 627         struct wm8741_priv *wm8741;
 628         int ret, i;
 629
 630         wm8741 = devm_kzalloc(&spi->dev, sizeof(struct wm8741_priv),
 631                              GFP_KERNEL);
 632         if (wm8741 == NULL)
 633                 return -ENOMEM;
 634
 635         for (i = 0; i < ARRAY_SIZE(wm8741->supplies); i++)
 636                 wm8741->supplies[i].supply = wm8741_supply_names[i];
 637
 638         ret = devm_regulator_bulk_get(&spi->dev, ARRAY_SIZE(wm8741->supplies),
 639                                       wm8741->supplies);
 640         if (ret != 0) {
 641                 dev_err(&spi->dev, "Failed to request supplies: %d\n", ret);
 642                 return ret;
 643         }
 644
 645         wm8741->regmap = devm_regmap_init_spi(spi, &wm8741_regmap);
 646         if (IS_ERR(wm8741->regmap)) {
 647                 ret = PTR_ERR(wm8741->regmap);
 648                 dev_err(&spi->dev, "Failed to init regmap: %d\n", ret);
 649                 return ret;
 650         }
 651
 652         ret = wm8741_set_pdata(&spi->dev, wm8741);
 653         if (ret != 0) {
 654                 dev_err(&spi->dev, "Failed to set pdata: %d\n", ret);
 655                 return ret;
 656         }
 657
 658         spi_set_drvdata(spi, wm8741);
 659
 660         ret = devm_snd_soc_register_component(&spi->dev,
 661                         &soc_component_dev_wm8741, &wm8741_dai, 1);
 662         return ret;
 663 }
 664
 665 static struct spi_driver wm8741_spi_driver = {
 666         .driver = {
 667                 .name   = "wm8741",
 668                 .of_match_table = wm8741_of_match,
 669         },
 670         .probe          = wm8741_spi_probe,
 671 };
 672 #endif /* CONFIG_SPI_MASTER */
 673
 674 static int __init wm8741_modinit(void)
 675 {
 676         int ret = 0;
 677
 678 #if IS_ENABLED(CONFIG_I2C)
 679         ret = i2c_add_driver(&wm8741_i2c_driver);
 680         if (ret != 0)
 681                 pr_err("Failed to register WM8741 I2C driver: %d\n", ret);
 682 #endif
 683 #if defined(CONFIG_SPI_MASTER)
 684         ret = spi_register_driver(&wm8741_spi_driver);
 685         if (ret != 0) {
 686                 printk(KERN_ERR "Failed to register wm8741 SPI driver: %d\n",
 687                        ret);
 688         }
 689 #endif
 690
 691         return ret;
 692 }
 693 module_init(wm8741_modinit);
 694
 695 static void __exit wm8741_exit(void)
 696 {
 697 #if defined(CONFIG_SPI_MASTER)
 698         spi_unregister_driver(&wm8741_spi_driver);
 699 #endif
 700 #if IS_ENABLED(CONFIG_I2C)
 701         i2c_del_driver(&wm8741_i2c_driver);
 702 #endif
 703 }
 704 module_exit(wm8741_exit);
 705
 706 MODULE_DESCRIPTION("ASoC WM8741 driver");
 707 MODULE_AUTHOR("Ian Lartey <ian@opensource.wolfsonmicro.com>");
 708 MODULE_LICENSE("GPL");