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 /* codec private data */
  41 struct wm8741_priv {
  42         struct wm8741_platform_data pdata;
  43         struct regmap *regmap;
  44         struct regulator_bulk_data supplies[WM8741_NUM_SUPPLIES];
  45         unsigned int sysclk;
  46         const struct snd_pcm_hw_constraint_list *sysclk_constraints;
  47 };
  48
  49 static const struct reg_default wm8741_reg_defaults[] = {
  50         {  0, 0x0000 },     /* R0  - DACLLSB Attenuation */
  51         {  1, 0x0000 },     /* R1  - DACLMSB Attenuation */
  52         {  2, 0x0000 },     /* R2  - DACRLSB Attenuation */
  53         {  3, 0x0000 },     /* R3  - DACRMSB Attenuation */
  54         {  4, 0x0000 },     /* R4  - Volume Control */
  55         {  5, 0x000A },     /* R5  - Format Control */
  56         {  6, 0x0000 },     /* R6  - Filter Control */
  57         {  7, 0x0000 },     /* R7  - Mode Control 1 */
  58         {  8, 0x0002 },     /* R8  - Mode Control 2 */
  59         { 32, 0x0002 },     /* R32 - ADDITONAL_CONTROL_1 */
  60 };
  61
  62 static int wm8741_reset(struct snd_soc_component *component)
  63 {
  64         return snd_soc_component_write(component, WM8741_RESET, 0);
  65 }
  66
  67 static const DECLARE_TLV_DB_SCALE(dac_tlv_fine, -12700, 13, 0);
  68 static const DECLARE_TLV_DB_SCALE(dac_tlv, -12700, 400, 0);
  69
  70 static const struct snd_kcontrol_new wm8741_snd_controls_stereo[] = {
  71 SOC_DOUBLE_R_TLV("Fine Playback Volume", WM8741_DACLLSB_ATTENUATION,
  72                  WM8741_DACRLSB_ATTENUATION, 1, 255, 1, dac_tlv_fine),
  73 SOC_DOUBLE_R_TLV("Playback Volume", WM8741_DACLMSB_ATTENUATION,
  74                  WM8741_DACRMSB_ATTENUATION, 0, 511, 1, dac_tlv),
  75 };
  76
  77 static const struct snd_kcontrol_new wm8741_snd_controls_mono_left[] = {
  78 SOC_SINGLE_TLV("Fine Playback Volume", WM8741_DACLLSB_ATTENUATION,
  79                  1, 255, 1, dac_tlv_fine),
  80 SOC_SINGLE_TLV("Playback Volume", WM8741_DACLMSB_ATTENUATION,
  81                  0, 511, 1, dac_tlv),
  82 };
  83
  84 static const struct snd_kcontrol_new wm8741_snd_controls_mono_right[] = {
  85 SOC_SINGLE_TLV("Fine Playback Volume", WM8741_DACRLSB_ATTENUATION,
  86                 1, 255, 1, dac_tlv_fine),
  87 SOC_SINGLE_TLV("Playback Volume", WM8741_DACRMSB_ATTENUATION,
  88                 0, 511, 1, dac_tlv),
  89 };
  90
  91 static const struct snd_soc_dapm_widget wm8741_dapm_widgets[] = {
  92 SND_SOC_DAPM_DAC("DACL", "Playback", SND_SOC_NOPM, 0, 0),
  93 SND_SOC_DAPM_DAC("DACR", "Playback", SND_SOC_NOPM, 0, 0),
  94 SND_SOC_DAPM_OUTPUT("VOUTLP"),
  95 SND_SOC_DAPM_OUTPUT("VOUTLN"),
  96 SND_SOC_DAPM_OUTPUT("VOUTRP"),
  97 SND_SOC_DAPM_OUTPUT("VOUTRN"),
  98 };
  99
 100 static const struct snd_soc_dapm_route wm8741_dapm_routes[] = {
 101         { "VOUTLP", NULL, "DACL" },
 102         { "VOUTLN", NULL, "DACL" },
 103         { "VOUTRP", NULL, "DACR" },
 104         { "VOUTRN", NULL, "DACR" },
 105 };
 106
 107 static const unsigned int rates_11289[] = {
 108         44100, 88200,
 109 };
 110
 111 static const struct snd_pcm_hw_constraint_list constraints_11289 = {
 112         .count  = ARRAY_SIZE(rates_11289),
 113         .list   = rates_11289,
 114 };
 115
 116 static const unsigned int rates_12288[] = {
 117         32000, 48000, 96000,
 118 };
 119
 120 static const struct snd_pcm_hw_constraint_list constraints_12288 = {
 121         .count  = ARRAY_SIZE(rates_12288),
 122         .list   = rates_12288,
 123 };
 124
 125 static const unsigned int rates_16384[] = {
 126         32000,
 127 };
 128
 129 static const struct snd_pcm_hw_constraint_list constraints_16384 = {
 130         .count  = ARRAY_SIZE(rates_16384),
 131         .list   = rates_16384,
 132 };
 133
 134 static const unsigned int rates_16934[] = {
 135         44100, 88200,
 136 };
 137
 138 static const struct snd_pcm_hw_constraint_list constraints_16934 = {
 139         .count  = ARRAY_SIZE(rates_16934),
 140         .list   = rates_16934,
 141 };
 142
 143 static const unsigned int rates_18432[] = {
 144         48000, 96000,
 145 };
 146
 147 static const struct snd_pcm_hw_constraint_list constraints_18432 = {
 148         .count  = ARRAY_SIZE(rates_18432),
 149         .list   = rates_18432,
 150 };
 151
 152 static const unsigned int rates_22579[] = {
 153         44100, 88200, 176400
 154 };
 155
 156 static const struct snd_pcm_hw_constraint_list constraints_22579 = {
 157         .count  = ARRAY_SIZE(rates_22579),
 158         .list   = rates_22579,
 159 };
 160
 161 static const unsigned int rates_24576[] = {
 162         32000, 48000, 96000, 192000
 163 };
 164
 165 static const struct snd_pcm_hw_constraint_list constraints_24576 = {
 166         .count  = ARRAY_SIZE(rates_24576),
 167         .list   = rates_24576,
 168 };
 169
 170 static const unsigned int rates_36864[] = {
 171         48000, 96000, 192000
 172 };
 173
 174 static const struct snd_pcm_hw_constraint_list constraints_36864 = {
 175         .count  = ARRAY_SIZE(rates_36864),
 176         .list   = rates_36864,
 177 };
 178
 179 static int wm8741_startup(struct snd_pcm_substream *substream,
 180                           struct snd_soc_dai *dai)
 181 {
 182         struct snd_soc_component *component = dai->component;
 183         struct wm8741_priv *wm8741 = snd_soc_component_get_drvdata(component);
 184
 185         if (wm8741->sysclk)
 186                 snd_pcm_hw_constraint_list(substream->runtime, 0,
 187                                 SNDRV_PCM_HW_PARAM_RATE,
 188                                 wm8741->sysclk_constraints);
 189
 190         return 0;
 191 }
 192
 193 static int wm8741_hw_params(struct snd_pcm_substream *substream,
 194                             struct snd_pcm_hw_params *params,
 195                             struct snd_soc_dai *dai)
 196 {
 197         struct snd_soc_component *component = dai->component;
 198         struct wm8741_priv *wm8741 = snd_soc_component_get_drvdata(component);
 199         unsigned int iface, mode;
 200         int i;
 201
 202         /* The set of sample rates that can be supported depends on the
 203          * MCLK supplied to the CODEC - enforce this.
 204          */
 205         if (!wm8741->sysclk) {
 206                 dev_err(component->dev,
 207                         "No MCLK configured, call set_sysclk() on init or in hw_params\n");
 208                 return -EINVAL;
 209         }
 210
 211         /* Find a supported LRCLK rate */
 212         for (i = 0; i < wm8741->sysclk_constraints->count; i++) {
 213                 if (wm8741->sysclk_constraints->list[i] == params_rate(params))
 214                         break;
 215         }
 216
 217         if (i == wm8741->sysclk_constraints->count) {
 218                 dev_err(component->dev, "LRCLK %d unsupported with MCLK %d\n",
 219                         params_rate(params), wm8741->sysclk);
 220                 return -EINVAL;
 221         }
 222
 223         /* bit size */
 224         switch (params_width(params)) {
 225         case 16:
 226                 iface = 0x0;
 227                 break;
 228         case 20:
 229                 iface = 0x1;
 230                 break;
 231         case 24:
 232                 iface = 0x2;
 233                 break;
 234         case 32:
 235                 iface = 0x3;
 236                 break;
 237         default:
 238                 dev_dbg(component->dev, "wm8741_hw_params:    Unsupported bit size param = %d",
 239                         params_width(params));
 240                 return -EINVAL;
 241         }
 242
 243         /* oversampling rate */
 244         if (params_rate(params) > 96000)
 245                 mode = 0x40;
 246         else if (params_rate(params) > 48000)
 247                 mode = 0x20;
 248         else
 249                 mode = 0x00;
 250
 251         dev_dbg(component->dev, "wm8741_hw_params:    bit size param = %d, rate param = %d",
 252                 params_width(params), params_rate(params));
 253
 254         snd_soc_component_update_bits(component, WM8741_FORMAT_CONTROL, WM8741_IWL_MASK,
 255                             iface);
 256         snd_soc_component_update_bits(component, WM8741_MODE_CONTROL_1, WM8741_OSR_MASK,
 257                             mode);
 258
 259         return 0;
 260 }
 261
 262 static int wm8741_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 263                 int clk_id, unsigned int freq, int dir)
 264 {
 265         struct snd_soc_component *component = codec_dai->component;
 266         struct wm8741_priv *wm8741 = snd_soc_component_get_drvdata(component);
 267
 268         dev_dbg(component->dev, "wm8741_set_dai_sysclk info: freq=%dHz\n", freq);
 269
 270         switch (freq) {
 271         case 0:
 272                 wm8741->sysclk_constraints = NULL;
 273                 break;
 274         case 11289600:
 275                 wm8741->sysclk_constraints = &constraints_11289;
 276                 break;
 277         case 12288000:
 278                 wm8741->sysclk_constraints = &constraints_12288;
 279                 break;
 280         case 16384000:
 281                 wm8741->sysclk_constraints = &constraints_16384;
 282                 break;
 283         case 16934400:
 284                 wm8741->sysclk_constraints = &constraints_16934;
 285                 break;
 286         case 18432000:
 287                 wm8741->sysclk_constraints = &constraints_18432;
 288                 break;
 289         case 22579200:
 290         case 33868800:
 291                 wm8741->sysclk_constraints = &constraints_22579;
 292                 break;
 293         case 24576000:
 294                 wm8741->sysclk_constraints = &constraints_24576;
 295                 break;
 296         case 36864000:
 297                 wm8741->sysclk_constraints = &constraints_36864;
 298                 break;
 299         default:
 300                 return -EINVAL;
 301         }
 302
 303         wm8741->sysclk = freq;
 304         return 0;
 305 }
 306
 307 static int wm8741_set_dai_fmt(struct snd_soc_dai *codec_dai,
 308                 unsigned int fmt)
 309 {
 310         struct snd_soc_component *component = codec_dai->component;
 311         unsigned int iface;
 312
 313         /* check master/slave audio interface */
 314         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 315         case SND_SOC_DAIFMT_CBS_CFS:
 316                 break;
 317         default:
 318                 return -EINVAL;
 319         }
 320
 321         /* interface format */
 322         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 323         case SND_SOC_DAIFMT_I2S:
 324                 iface = 0x08;
 325                 break;
 326         case SND_SOC_DAIFMT_RIGHT_J:
 327                 iface = 0x00;
 328                 break;
 329         case SND_SOC_DAIFMT_LEFT_J:
 330                 iface = 0x04;
 331                 break;
 332         case SND_SOC_DAIFMT_DSP_A:
 333                 iface = 0x0C;
 334                 break;
 335         case SND_SOC_DAIFMT_DSP_B:
 336                 iface = 0x1C;
 337                 break;
 338         default:
 339                 return -EINVAL;
 340         }
 341
 342         /* clock inversion */
 343         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 344         case SND_SOC_DAIFMT_NB_NF:
 345                 break;
 346         case SND_SOC_DAIFMT_NB_IF:
 347                 iface |= 0x10;
 348                 break;
 349         case SND_SOC_DAIFMT_IB_NF:
 350                 iface |= 0x20;
 351                 break;
 352         case SND_SOC_DAIFMT_IB_IF:
 353                 iface |= 0x30;
 354                 break;
 355         default:
 356                 return -EINVAL;
 357         }
 358
 359
 360         dev_dbg(component->dev, "wm8741_set_dai_fmt:    Format=%x, Clock Inv=%x\n",
 361                                 fmt & SND_SOC_DAIFMT_FORMAT_MASK,
 362                                 ((fmt & SND_SOC_DAIFMT_INV_MASK)));
 363
 364         snd_soc_component_update_bits(component, WM8741_FORMAT_CONTROL,
 365                             WM8741_BCP_MASK | WM8741_LRP_MASK | WM8741_FMT_MASK,
 366                             iface);
 367
 368         return 0;
 369 }
 370
 371 static int wm8741_mute(struct snd_soc_dai *codec_dai, int mute)
 372 {
 373         struct snd_soc_component *component = codec_dai->component;
 374
 375         snd_soc_component_update_bits(component, WM8741_VOLUME_CONTROL,
 376                         WM8741_SOFT_MASK, !!mute << WM8741_SOFT_SHIFT);
 377         return 0;
 378 }
 379
 380 #define WM8741_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
 381                         SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | \
 382                         SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 | \
 383                         SNDRV_PCM_RATE_192000)
 384
 385 #define WM8741_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
 386                         SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
 387
 388 static const struct snd_soc_dai_ops wm8741_dai_ops = {
 389         .startup        = wm8741_startup,
 390         .hw_params      = wm8741_hw_params,
 391         .set_sysclk     = wm8741_set_dai_sysclk,
 392         .set_fmt        = wm8741_set_dai_fmt,
 393         .digital_mute   = wm8741_mute,
 394 };
 395
 396 static struct snd_soc_dai_driver wm8741_dai = {
 397         .name = "wm8741",
 398         .playback = {
 399                 .stream_name = "Playback",
 400                 .channels_min = 2,
 401                 .channels_max = 2,
 402                 .rates = WM8741_RATES,
 403                 .formats = WM8741_FORMATS,
 404         },
 405         .ops = &wm8741_dai_ops,
 406 };
 407
 408 #ifdef CONFIG_PM
 409 static int wm8741_resume(struct snd_soc_component *component)
 410 {
 411         snd_soc_component_cache_sync(component);
 412         return 0;
 413 }
 414 #else
 415 #define wm8741_resume NULL
 416 #endif
 417
 418 static int wm8741_configure(struct snd_soc_component *component)
 419 {
 420         struct wm8741_priv *wm8741 = snd_soc_component_get_drvdata(component);
 421
 422         /* Configure differential mode */
 423         switch (wm8741->pdata.diff_mode) {
 424         case WM8741_DIFF_MODE_STEREO:
 425         case WM8741_DIFF_MODE_STEREO_REVERSED:
 426         case WM8741_DIFF_MODE_MONO_LEFT:
 427         case WM8741_DIFF_MODE_MONO_RIGHT:
 428                 snd_soc_component_update_bits(component, WM8741_MODE_CONTROL_2,
 429                                 WM8741_DIFF_MASK,
 430                                 wm8741->pdata.diff_mode << WM8741_DIFF_SHIFT);
 431                 break;
 432         default:
 433                 return -EINVAL;
 434         }
 435
 436         /* Change some default settings - latch VU */
 437         snd_soc_component_update_bits(component, WM8741_DACLLSB_ATTENUATION,
 438                         WM8741_UPDATELL, WM8741_UPDATELL);
 439         snd_soc_component_update_bits(component, WM8741_DACLMSB_ATTENUATION,
 440                         WM8741_UPDATELM, WM8741_UPDATELM);
 441         snd_soc_component_update_bits(component, WM8741_DACRLSB_ATTENUATION,
 442                         WM8741_UPDATERL, WM8741_UPDATERL);
 443         snd_soc_component_update_bits(component, WM8741_DACRMSB_ATTENUATION,
 444                         WM8741_UPDATERM, WM8741_UPDATERM);
 445
 446         return 0;
 447 }
 448
 449 static int wm8741_add_controls(struct snd_soc_component *component)
 450 {
 451         struct wm8741_priv *wm8741 = snd_soc_component_get_drvdata(component);
 452
 453         switch (wm8741->pdata.diff_mode) {
 454         case WM8741_DIFF_MODE_STEREO:
 455         case WM8741_DIFF_MODE_STEREO_REVERSED:
 456                 snd_soc_add_component_controls(component,
 457                                 wm8741_snd_controls_stereo,
 458                                 ARRAY_SIZE(wm8741_snd_controls_stereo));
 459                 break;
 460         case WM8741_DIFF_MODE_MONO_LEFT:
 461                 snd_soc_add_component_controls(component,
 462                                 wm8741_snd_controls_mono_left,
 463                                 ARRAY_SIZE(wm8741_snd_controls_mono_left));
 464                 break;
 465         case WM8741_DIFF_MODE_MONO_RIGHT:
 466                 snd_soc_add_component_controls(component,
 467                                 wm8741_snd_controls_mono_right,
 468                                 ARRAY_SIZE(wm8741_snd_controls_mono_right));
 469                 break;
 470         default:
 471                 return -EINVAL;
 472         }
 473
 474         return 0;
 475 }
 476
 477 static int wm8741_probe(struct snd_soc_component *component)
 478 {
 479         struct wm8741_priv *wm8741 = snd_soc_component_get_drvdata(component);
 480         int ret = 0;
 481
 482         ret = regulator_bulk_enable(ARRAY_SIZE(wm8741->supplies),
 483                                     wm8741->supplies);
 484         if (ret != 0) {
 485                 dev_err(component->dev, "Failed to enable supplies: %d\n", ret);
 486                 goto err_get;
 487         }
 488
 489         ret = wm8741_reset(component);
 490         if (ret < 0) {
 491                 dev_err(component->dev, "Failed to issue reset\n");
 492                 goto err_enable;
 493         }
 494
 495         ret = wm8741_configure(component);
 496         if (ret < 0) {
 497                 dev_err(component->dev, "Failed to change default settings\n");
 498                 goto err_enable;
 499         }
 500
 501         ret = wm8741_add_controls(component);
 502         if (ret < 0) {
 503                 dev_err(component->dev, "Failed to add controls\n");
 504                 goto err_enable;
 505         }
 506
 507         dev_dbg(component->dev, "Successful registration\n");
 508         return ret;
 509
 510 err_enable:
 511         regulator_bulk_disable(ARRAY_SIZE(wm8741->supplies), wm8741->supplies);
 512 err_get:
 513         return ret;
 514 }
 515
 516 static void wm8741_remove(struct snd_soc_component *component)
 517 {
 518         struct wm8741_priv *wm8741 = snd_soc_component_get_drvdata(component);
 519
 520         regulator_bulk_disable(ARRAY_SIZE(wm8741->supplies), wm8741->supplies);
 521 }
 522
 523 static const struct snd_soc_component_driver soc_component_dev_wm8741 = {
 524         .probe                  = wm8741_probe,
 525         .remove                 = wm8741_remove,
 526         .resume                 = wm8741_resume,
 527         .dapm_widgets           = wm8741_dapm_widgets,
 528         .num_dapm_widgets       = ARRAY_SIZE(wm8741_dapm_widgets),
 529         .dapm_routes            = wm8741_dapm_routes,
 530         .num_dapm_routes        = ARRAY_SIZE(wm8741_dapm_routes),
 531         .idle_bias_on           = 1,
 532         .use_pmdown_time        = 1,
 533         .endianness             = 1,
 534         .non_legacy_dai_naming  = 1,
 535 };
 536
 537 static const struct of_device_id wm8741_of_match[] = {
 538         { .compatible = "wlf,wm8741", },
 539         { }
 540 };
 541 MODULE_DEVICE_TABLE(of, wm8741_of_match);
 542
 543 static const struct regmap_config wm8741_regmap = {
 544         .reg_bits = 7,
 545         .val_bits = 9,
 546         .max_register = WM8741_MAX_REGISTER,
 547
 548         .reg_defaults = wm8741_reg_defaults,
 549         .num_reg_defaults = ARRAY_SIZE(wm8741_reg_defaults),
 550         .cache_type = REGCACHE_RBTREE,
 551 };
 552
 553 static int wm8741_set_pdata(struct device *dev, struct wm8741_priv *wm8741)
 554 {
 555         const struct wm8741_platform_data *pdata = dev_get_platdata(dev);
 556         u32 diff_mode;
 557
 558         if (dev->of_node) {
 559                 if (of_property_read_u32(dev->of_node, "diff-mode", &diff_mode)
 560                                 >= 0)
 561                         wm8741->pdata.diff_mode = diff_mode;
 562         } else {
 563                 if (pdata != NULL)
 564                         memcpy(&wm8741->pdata, pdata, sizeof(wm8741->pdata));
 565         }
 566
 567         return 0;
 568 }
 569
 570 #if IS_ENABLED(CONFIG_I2C)
 571 static int wm8741_i2c_probe(struct i2c_client *i2c,
 572                             const struct i2c_device_id *id)
 573 {
 574         struct wm8741_priv *wm8741;
 575         int ret, i;
 576
 577         wm8741 = devm_kzalloc(&i2c->dev, sizeof(struct wm8741_priv),
 578                               GFP_KERNEL);
 579         if (wm8741 == NULL)
 580                 return -ENOMEM;
 581
 582         for (i = 0; i < ARRAY_SIZE(wm8741->supplies); i++)
 583                 wm8741->supplies[i].supply = wm8741_supply_names[i];
 584
 585         ret = devm_regulator_bulk_get(&i2c->dev, ARRAY_SIZE(wm8741->supplies),
 586                                       wm8741->supplies);
 587         if (ret != 0) {
 588                 dev_err(&i2c->dev, "Failed to request supplies: %d\n", ret);
 589                 return ret;
 590         }
 591
 592         wm8741->regmap = devm_regmap_init_i2c(i2c, &wm8741_regmap);
 593         if (IS_ERR(wm8741->regmap)) {
 594                 ret = PTR_ERR(wm8741->regmap);
 595                 dev_err(&i2c->dev, "Failed to init regmap: %d\n", ret);
 596                 return ret;
 597         }
 598
 599         ret = wm8741_set_pdata(&i2c->dev, wm8741);
 600         if (ret != 0) {
 601                 dev_err(&i2c->dev, "Failed to set pdata: %d\n", ret);
 602                 return ret;
 603         }
 604
 605         i2c_set_clientdata(i2c, wm8741);
 606
 607         ret = devm_snd_soc_register_component(&i2c->dev,
 608                                      &soc_component_dev_wm8741, &wm8741_dai, 1);
 609
 610         return ret;
 611 }
 612
 613 static const struct i2c_device_id wm8741_i2c_id[] = {
 614         { "wm8741", 0 },
 615         { }
 616 };
 617 MODULE_DEVICE_TABLE(i2c, wm8741_i2c_id);
 618
 619 static struct i2c_driver wm8741_i2c_driver = {
 620         .driver = {
 621                 .name = "wm8741",
 622                 .of_match_table = wm8741_of_match,
 623         },
 624         .probe =    wm8741_i2c_probe,
 625         .id_table = wm8741_i2c_id,
 626 };
 627 #endif
 628
 629 #if defined(CONFIG_SPI_MASTER)
 630 static int wm8741_spi_probe(struct spi_device *spi)
 631 {
 632         struct wm8741_priv *wm8741;
 633         int ret, i;
 634
 635         wm8741 = devm_kzalloc(&spi->dev, sizeof(struct wm8741_priv),
 636                              GFP_KERNEL);
 637         if (wm8741 == NULL)
 638                 return -ENOMEM;
 639
 640         for (i = 0; i < ARRAY_SIZE(wm8741->supplies); i++)
 641                 wm8741->supplies[i].supply = wm8741_supply_names[i];
 642
 643         ret = devm_regulator_bulk_get(&spi->dev, ARRAY_SIZE(wm8741->supplies),
 644                                       wm8741->supplies);
 645         if (ret != 0) {
 646                 dev_err(&spi->dev, "Failed to request supplies: %d\n", ret);
 647                 return ret;
 648         }
 649
 650         wm8741->regmap = devm_regmap_init_spi(spi, &wm8741_regmap);
 651         if (IS_ERR(wm8741->regmap)) {
 652                 ret = PTR_ERR(wm8741->regmap);
 653                 dev_err(&spi->dev, "Failed to init regmap: %d\n", ret);
 654                 return ret;
 655         }
 656
 657         ret = wm8741_set_pdata(&spi->dev, wm8741);
 658         if (ret != 0) {
 659                 dev_err(&spi->dev, "Failed to set pdata: %d\n", ret);
 660                 return ret;
 661         }
 662
 663         spi_set_drvdata(spi, wm8741);
 664
 665         ret = devm_snd_soc_register_component(&spi->dev,
 666                         &soc_component_dev_wm8741, &wm8741_dai, 1);
 667         return ret;
 668 }
 669
 670 static struct spi_driver wm8741_spi_driver = {
 671         .driver = {
 672                 .name   = "wm8741",
 673                 .of_match_table = wm8741_of_match,
 674         },
 675         .probe          = wm8741_spi_probe,
 676 };
 677 #endif /* CONFIG_SPI_MASTER */
 678
 679 static int __init wm8741_modinit(void)
 680 {
 681         int ret = 0;
 682
 683 #if IS_ENABLED(CONFIG_I2C)
 684         ret = i2c_add_driver(&wm8741_i2c_driver);
 685         if (ret != 0)
 686                 pr_err("Failed to register WM8741 I2C driver: %d\n", ret);
 687 #endif
 688 #if defined(CONFIG_SPI_MASTER)
 689         ret = spi_register_driver(&wm8741_spi_driver);
 690         if (ret != 0) {
 691                 printk(KERN_ERR "Failed to register wm8741 SPI driver: %d\n",
 692                        ret);
 693         }
 694 #endif
 695
 696         return ret;
 697 }
 698 module_init(wm8741_modinit);
 699
 700 static void __exit wm8741_exit(void)
 701 {
 702 #if defined(CONFIG_SPI_MASTER)
 703         spi_unregister_driver(&wm8741_spi_driver);
 704 #endif
 705 #if IS_ENABLED(CONFIG_I2C)
 706         i2c_del_driver(&wm8741_i2c_driver);
 707 #endif
 708 }
 709 module_exit(wm8741_exit);
 710
 711 MODULE_DESCRIPTION("ASoC WM8741 driver");
 712 MODULE_AUTHOR("Ian Lartey <ian@opensource.wolfsonmicro.com>");
 713 MODULE_LICENSE("GPL");