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_codec *codec)
  63 {
  64         return snd_soc_write(codec, 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_codec *codec = dai->codec;
 183         struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
 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_codec *codec = dai->codec;
 198         struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
 199         unsigned int iface;
 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(codec->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(codec->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(codec->dev, "wm8741_hw_params:    Unsupported bit size param = %d",
 239                         params_width(params));
 240                 return -EINVAL;
 241         }
 242
 243         dev_dbg(codec->dev, "wm8741_hw_params:    bit size param = %d, rate param = %d",
 244                 params_width(params), params_rate(params));
 245
 246         snd_soc_update_bits(codec, WM8741_FORMAT_CONTROL, WM8741_IWL_MASK,
 247                             iface);
 248
 249         return 0;
 250 }
 251
 252 static int wm8741_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 253                 int clk_id, unsigned int freq, int dir)
 254 {
 255         struct snd_soc_codec *codec = codec_dai->codec;
 256         struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
 257
 258         dev_dbg(codec->dev, "wm8741_set_dai_sysclk info: freq=%dHz\n", freq);
 259
 260         switch (freq) {
 261         case 0:
 262                 wm8741->sysclk_constraints = NULL;
 263                 break;
 264         case 11289600:
 265                 wm8741->sysclk_constraints = &constraints_11289;
 266                 break;
 267         case 12288000:
 268                 wm8741->sysclk_constraints = &constraints_12288;
 269                 break;
 270         case 16384000:
 271                 wm8741->sysclk_constraints = &constraints_16384;
 272                 break;
 273         case 16934400:
 274                 wm8741->sysclk_constraints = &constraints_16934;
 275                 break;
 276         case 18432000:
 277                 wm8741->sysclk_constraints = &constraints_18432;
 278                 break;
 279         case 22579200:
 280         case 33868800:
 281                 wm8741->sysclk_constraints = &constraints_22579;
 282                 break;
 283         case 24576000:
 284                 wm8741->sysclk_constraints = &constraints_24576;
 285                 break;
 286         case 36864000:
 287                 wm8741->sysclk_constraints = &constraints_36864;
 288                 break;
 289         default:
 290                 return -EINVAL;
 291         }
 292
 293         wm8741->sysclk = freq;
 294         return 0;
 295 }
 296
 297 static int wm8741_set_dai_fmt(struct snd_soc_dai *codec_dai,
 298                 unsigned int fmt)
 299 {
 300         struct snd_soc_codec *codec = codec_dai->codec;
 301         unsigned int iface;
 302
 303         /* check master/slave audio interface */
 304         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 305         case SND_SOC_DAIFMT_CBS_CFS:
 306                 break;
 307         default:
 308                 return -EINVAL;
 309         }
 310
 311         /* interface format */
 312         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 313         case SND_SOC_DAIFMT_I2S:
 314                 iface = 0x08;
 315                 break;
 316         case SND_SOC_DAIFMT_RIGHT_J:
 317                 iface = 0x00;
 318                 break;
 319         case SND_SOC_DAIFMT_LEFT_J:
 320                 iface = 0x04;
 321                 break;
 322         case SND_SOC_DAIFMT_DSP_A:
 323                 iface = 0x0C;
 324                 break;
 325         case SND_SOC_DAIFMT_DSP_B:
 326                 iface = 0x1C;
 327                 break;
 328         default:
 329                 return -EINVAL;
 330         }
 331
 332         /* clock inversion */
 333         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 334         case SND_SOC_DAIFMT_NB_NF:
 335                 break;
 336         case SND_SOC_DAIFMT_NB_IF:
 337                 iface |= 0x10;
 338                 break;
 339         case SND_SOC_DAIFMT_IB_NF:
 340                 iface |= 0x20;
 341                 break;
 342         case SND_SOC_DAIFMT_IB_IF:
 343                 iface |= 0x30;
 344                 break;
 345         default:
 346                 return -EINVAL;
 347         }
 348
 349
 350         dev_dbg(codec->dev, "wm8741_set_dai_fmt:    Format=%x, Clock Inv=%x\n",
 351                                 fmt & SND_SOC_DAIFMT_FORMAT_MASK,
 352                                 ((fmt & SND_SOC_DAIFMT_INV_MASK)));
 353
 354         snd_soc_update_bits(codec, WM8741_FORMAT_CONTROL,
 355                             WM8741_BCP_MASK | WM8741_LRP_MASK | WM8741_FMT_MASK,
 356                             iface);
 357
 358         return 0;
 359 }
 360
 361 #define WM8741_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
 362                         SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | \
 363                         SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 | \
 364                         SNDRV_PCM_RATE_192000)
 365
 366 #define WM8741_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
 367                         SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
 368
 369 static const struct snd_soc_dai_ops wm8741_dai_ops = {
 370         .startup        = wm8741_startup,
 371         .hw_params      = wm8741_hw_params,
 372         .set_sysclk     = wm8741_set_dai_sysclk,
 373         .set_fmt        = wm8741_set_dai_fmt,
 374 };
 375
 376 static struct snd_soc_dai_driver wm8741_dai = {
 377         .name = "wm8741",
 378         .playback = {
 379                 .stream_name = "Playback",
 380                 .channels_min = 2,
 381                 .channels_max = 2,
 382                 .rates = WM8741_RATES,
 383                 .formats = WM8741_FORMATS,
 384         },
 385         .ops = &wm8741_dai_ops,
 386 };
 387
 388 #ifdef CONFIG_PM
 389 static int wm8741_resume(struct snd_soc_codec *codec)
 390 {
 391         snd_soc_cache_sync(codec);
 392         return 0;
 393 }
 394 #else
 395 #define wm8741_resume NULL
 396 #endif
 397
 398 static int wm8741_configure(struct snd_soc_codec *codec)
 399 {
 400         struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
 401
 402         /* Configure differential mode */
 403         switch (wm8741->pdata.diff_mode) {
 404         case WM8741_DIFF_MODE_STEREO:
 405         case WM8741_DIFF_MODE_STEREO_REVERSED:
 406         case WM8741_DIFF_MODE_MONO_LEFT:
 407         case WM8741_DIFF_MODE_MONO_RIGHT:
 408                 snd_soc_update_bits(codec, WM8741_MODE_CONTROL_2,
 409                                 WM8741_DIFF_MASK,
 410                                 wm8741->pdata.diff_mode << WM8741_DIFF_SHIFT);
 411                 break;
 412         default:
 413                 return -EINVAL;
 414         }
 415
 416         /* Change some default settings - latch VU */
 417         snd_soc_update_bits(codec, WM8741_DACLLSB_ATTENUATION,
 418                         WM8741_UPDATELL, WM8741_UPDATELL);
 419         snd_soc_update_bits(codec, WM8741_DACLMSB_ATTENUATION,
 420                         WM8741_UPDATELM, WM8741_UPDATELM);
 421         snd_soc_update_bits(codec, WM8741_DACRLSB_ATTENUATION,
 422                         WM8741_UPDATERL, WM8741_UPDATERL);
 423         snd_soc_update_bits(codec, WM8741_DACRMSB_ATTENUATION,
 424                         WM8741_UPDATERM, WM8741_UPDATERM);
 425
 426         return 0;
 427 }
 428
 429 static int wm8741_add_controls(struct snd_soc_codec *codec)
 430 {
 431         struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
 432
 433         switch (wm8741->pdata.diff_mode) {
 434         case WM8741_DIFF_MODE_STEREO:
 435         case WM8741_DIFF_MODE_STEREO_REVERSED:
 436                 snd_soc_add_codec_controls(codec,
 437                                 wm8741_snd_controls_stereo,
 438                                 ARRAY_SIZE(wm8741_snd_controls_stereo));
 439                 break;
 440         case WM8741_DIFF_MODE_MONO_LEFT:
 441                 snd_soc_add_codec_controls(codec,
 442                                 wm8741_snd_controls_mono_left,
 443                                 ARRAY_SIZE(wm8741_snd_controls_mono_left));
 444                 break;
 445         case WM8741_DIFF_MODE_MONO_RIGHT:
 446                 snd_soc_add_codec_controls(codec,
 447                                 wm8741_snd_controls_mono_right,
 448                                 ARRAY_SIZE(wm8741_snd_controls_mono_right));
 449                 break;
 450         default:
 451                 return -EINVAL;
 452         }
 453
 454         return 0;
 455 }
 456
 457 static int wm8741_probe(struct snd_soc_codec *codec)
 458 {
 459         struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
 460         int ret = 0;
 461
 462         ret = regulator_bulk_enable(ARRAY_SIZE(wm8741->supplies),
 463                                     wm8741->supplies);
 464         if (ret != 0) {
 465                 dev_err(codec->dev, "Failed to enable supplies: %d\n", ret);
 466                 goto err_get;
 467         }
 468
 469         ret = wm8741_reset(codec);
 470         if (ret < 0) {
 471                 dev_err(codec->dev, "Failed to issue reset\n");
 472                 goto err_enable;
 473         }
 474
 475         ret = wm8741_configure(codec);
 476         if (ret < 0) {
 477                 dev_err(codec->dev, "Failed to change default settings\n");
 478                 goto err_enable;
 479         }
 480
 481         ret = wm8741_add_controls(codec);
 482         if (ret < 0) {
 483                 dev_err(codec->dev, "Failed to add controls\n");
 484                 goto err_enable;
 485         }
 486
 487         dev_dbg(codec->dev, "Successful registration\n");
 488         return ret;
 489
 490 err_enable:
 491         regulator_bulk_disable(ARRAY_SIZE(wm8741->supplies), wm8741->supplies);
 492 err_get:
 493         return ret;
 494 }
 495
 496 static int wm8741_remove(struct snd_soc_codec *codec)
 497 {
 498         struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
 499
 500         regulator_bulk_disable(ARRAY_SIZE(wm8741->supplies), wm8741->supplies);
 501
 502         return 0;
 503 }
 504
 505 static const struct snd_soc_codec_driver soc_codec_dev_wm8741 = {
 506         .probe =        wm8741_probe,
 507         .remove =       wm8741_remove,
 508         .resume =       wm8741_resume,
 509
 510         .component_driver = {
 511                 .dapm_widgets           = wm8741_dapm_widgets,
 512                 .num_dapm_widgets       = ARRAY_SIZE(wm8741_dapm_widgets),
 513                 .dapm_routes            = wm8741_dapm_routes,
 514                 .num_dapm_routes        = ARRAY_SIZE(wm8741_dapm_routes),
 515         },
 516 };
 517
 518 static const struct of_device_id wm8741_of_match[] = {
 519         { .compatible = "wlf,wm8741", },
 520         { }
 521 };
 522 MODULE_DEVICE_TABLE(of, wm8741_of_match);
 523
 524 static const struct regmap_config wm8741_regmap = {
 525         .reg_bits = 7,
 526         .val_bits = 9,
 527         .max_register = WM8741_MAX_REGISTER,
 528
 529         .reg_defaults = wm8741_reg_defaults,
 530         .num_reg_defaults = ARRAY_SIZE(wm8741_reg_defaults),
 531         .cache_type = REGCACHE_RBTREE,
 532 };
 533
 534 static int wm8741_set_pdata(struct device *dev, struct wm8741_priv *wm8741)
 535 {
 536         const struct wm8741_platform_data *pdata = dev_get_platdata(dev);
 537         u32 diff_mode;
 538
 539         if (dev->of_node) {
 540                 if (of_property_read_u32(dev->of_node, "diff-mode", &diff_mode)
 541                                 >= 0)
 542                         wm8741->pdata.diff_mode = diff_mode;
 543         } else {
 544                 if (pdata != NULL)
 545                         memcpy(&wm8741->pdata, pdata, sizeof(wm8741->pdata));
 546         }
 547
 548         return 0;
 549 }
 550
 551 #if IS_ENABLED(CONFIG_I2C)
 552 static int wm8741_i2c_probe(struct i2c_client *i2c,
 553                             const struct i2c_device_id *id)
 554 {
 555         struct wm8741_priv *wm8741;
 556         int ret, i;
 557
 558         wm8741 = devm_kzalloc(&i2c->dev, sizeof(struct wm8741_priv),
 559                               GFP_KERNEL);
 560         if (wm8741 == NULL)
 561                 return -ENOMEM;
 562
 563         for (i = 0; i < ARRAY_SIZE(wm8741->supplies); i++)
 564                 wm8741->supplies[i].supply = wm8741_supply_names[i];
 565
 566         ret = devm_regulator_bulk_get(&i2c->dev, ARRAY_SIZE(wm8741->supplies),
 567                                       wm8741->supplies);
 568         if (ret != 0) {
 569                 dev_err(&i2c->dev, "Failed to request supplies: %d\n", ret);
 570                 return ret;
 571         }
 572
 573         wm8741->regmap = devm_regmap_init_i2c(i2c, &wm8741_regmap);
 574         if (IS_ERR(wm8741->regmap)) {
 575                 ret = PTR_ERR(wm8741->regmap);
 576                 dev_err(&i2c->dev, "Failed to init regmap: %d\n", ret);
 577                 return ret;
 578         }
 579
 580         ret = wm8741_set_pdata(&i2c->dev, wm8741);
 581         if (ret != 0) {
 582                 dev_err(&i2c->dev, "Failed to set pdata: %d\n", ret);
 583                 return ret;
 584         }
 585
 586         i2c_set_clientdata(i2c, wm8741);
 587
 588         ret = snd_soc_register_codec(&i2c->dev,
 589                                      &soc_codec_dev_wm8741, &wm8741_dai, 1);
 590
 591         return ret;
 592 }
 593
 594 static int wm8741_i2c_remove(struct i2c_client *client)
 595 {
 596         snd_soc_unregister_codec(&client->dev);
 597         return 0;
 598 }
 599
 600 static const struct i2c_device_id wm8741_i2c_id[] = {
 601         { "wm8741", 0 },
 602         { }
 603 };
 604 MODULE_DEVICE_TABLE(i2c, wm8741_i2c_id);
 605
 606 static struct i2c_driver wm8741_i2c_driver = {
 607         .driver = {
 608                 .name = "wm8741",
 609                 .of_match_table = wm8741_of_match,
 610         },
 611         .probe =    wm8741_i2c_probe,
 612         .remove =   wm8741_i2c_remove,
 613         .id_table = wm8741_i2c_id,
 614 };
 615 #endif
 616
 617 #if defined(CONFIG_SPI_MASTER)
 618 static int wm8741_spi_probe(struct spi_device *spi)
 619 {
 620         struct wm8741_priv *wm8741;
 621         int ret, i;
 622
 623         wm8741 = devm_kzalloc(&spi->dev, sizeof(struct wm8741_priv),
 624                              GFP_KERNEL);
 625         if (wm8741 == NULL)
 626                 return -ENOMEM;
 627
 628         for (i = 0; i < ARRAY_SIZE(wm8741->supplies); i++)
 629                 wm8741->supplies[i].supply = wm8741_supply_names[i];
 630
 631         ret = devm_regulator_bulk_get(&spi->dev, ARRAY_SIZE(wm8741->supplies),
 632                                       wm8741->supplies);
 633         if (ret != 0) {
 634                 dev_err(&spi->dev, "Failed to request supplies: %d\n", ret);
 635                 return ret;
 636         }
 637
 638         wm8741->regmap = devm_regmap_init_spi(spi, &wm8741_regmap);
 639         if (IS_ERR(wm8741->regmap)) {
 640                 ret = PTR_ERR(wm8741->regmap);
 641                 dev_err(&spi->dev, "Failed to init regmap: %d\n", ret);
 642                 return ret;
 643         }
 644
 645         ret = wm8741_set_pdata(&spi->dev, wm8741);
 646         if (ret != 0) {
 647                 dev_err(&spi->dev, "Failed to set pdata: %d\n", ret);
 648                 return ret;
 649         }
 650
 651         spi_set_drvdata(spi, wm8741);
 652
 653         ret = snd_soc_register_codec(&spi->dev,
 654                         &soc_codec_dev_wm8741, &wm8741_dai, 1);
 655         return ret;
 656 }
 657
 658 static int wm8741_spi_remove(struct spi_device *spi)
 659 {
 660         snd_soc_unregister_codec(&spi->dev);
 661         return 0;
 662 }
 663
 664 static struct spi_driver wm8741_spi_driver = {
 665         .driver = {
 666                 .name   = "wm8741",
 667                 .of_match_table = wm8741_of_match,
 668         },
 669         .probe          = wm8741_spi_probe,
 670         .remove         = wm8741_spi_remove,
 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");