sound/soc/codecs/wm8741.c

   1 /*
   2  * wm8741.c  --  WM8741 ALSA SoC Audio driver
   3  *
   4  * Copyright 2010-1 Wolfson Microelectronics plc
   5  *
   6  * Author: Ian Lartey <ian@opensource.wolfsonmicro.com>
   7  *
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  */
  13
  14 #include <linux/module.h>
  15 #include <linux/moduleparam.h>
  16 #include <linux/init.h>
  17 #include <linux/delay.h>
  18 #include <linux/pm.h>
  19 #include <linux/i2c.h>
  20 #include <linux/spi/spi.h>
  21 #include <linux/regmap.h>
  22 #include <linux/regulator/consumer.h>
  23 #include <linux/slab.h>
  24 #include <linux/of_device.h>
  25 #include <sound/core.h>
  26 #include <sound/pcm.h>
  27 #include <sound/pcm_params.h>
  28 #include <sound/soc.h>
  29 #include <sound/initval.h>
  30 #include <sound/tlv.h>
  31
  32 #include "wm8741.h"
  33
  34 #define WM8741_NUM_SUPPLIES 2
  35 static const char *wm8741_supply_names[WM8741_NUM_SUPPLIES] = {
  36         "AVDD",
  37         "DVDD",
  38 };
  39
  40 #define WM8741_NUM_RATES 6
  41
  42 /* codec private data */
  43 struct wm8741_priv {
  44         struct wm8741_platform_data pdata;
  45         struct regmap *regmap;
  46         struct regulator_bulk_data supplies[WM8741_NUM_SUPPLIES];
  47         unsigned int sysclk;
  48         const struct snd_pcm_hw_constraint_list *sysclk_constraints;
  49 };
  50
  51 static const struct reg_default wm8741_reg_defaults[] = {
  52         {  0, 0x0000 },     /* R0  - DACLLSB Attenuation */
  53         {  1, 0x0000 },     /* R1  - DACLMSB Attenuation */
  54         {  2, 0x0000 },     /* R2  - DACRLSB Attenuation */
  55         {  3, 0x0000 },     /* R3  - DACRMSB Attenuation */
  56         {  4, 0x0000 },     /* R4  - Volume Control */
  57         {  5, 0x000A },     /* R5  - Format Control */
  58         {  6, 0x0000 },     /* R6  - Filter Control */
  59         {  7, 0x0000 },     /* R7  - Mode Control 1 */
  60         {  8, 0x0002 },     /* R8  - Mode Control 2 */
  61         { 32, 0x0002 },     /* R32 - ADDITONAL_CONTROL_1 */
  62 };
  63
  64 static bool wm8741_readable(struct device *dev, unsigned int reg)
  65 {
  66         switch (reg) {
  67         case WM8741_DACLLSB_ATTENUATION:
  68         case WM8741_DACLMSB_ATTENUATION:
  69         case WM8741_DACRLSB_ATTENUATION:
  70         case WM8741_DACRMSB_ATTENUATION:
  71         case WM8741_VOLUME_CONTROL:
  72         case WM8741_FORMAT_CONTROL:
  73         case WM8741_FILTER_CONTROL:
  74         case WM8741_MODE_CONTROL_1:
  75         case WM8741_MODE_CONTROL_2:
  76         case WM8741_ADDITIONAL_CONTROL_1:
  77                 return true;
  78         default:
  79                 return false;
  80         }
  81 }
  82
  83 static int wm8741_reset(struct snd_soc_codec *codec)
  84 {
  85         return snd_soc_write(codec, WM8741_RESET, 0);
  86 }
  87
  88 static const DECLARE_TLV_DB_SCALE(dac_tlv_fine, -12700, 13, 0);
  89 static const DECLARE_TLV_DB_SCALE(dac_tlv, -12700, 400, 0);
  90
  91 static const struct snd_kcontrol_new wm8741_snd_controls_stereo[] = {
  92 SOC_DOUBLE_R_TLV("Fine Playback Volume", WM8741_DACLLSB_ATTENUATION,
  93                  WM8741_DACRLSB_ATTENUATION, 1, 255, 1, dac_tlv_fine),
  94 SOC_DOUBLE_R_TLV("Playback Volume", WM8741_DACLMSB_ATTENUATION,
  95                  WM8741_DACRMSB_ATTENUATION, 0, 511, 1, dac_tlv),
  96 };
  97
  98 static const struct snd_kcontrol_new wm8741_snd_controls_mono_left[] = {
  99 SOC_SINGLE_TLV("Fine Playback Volume", WM8741_DACLLSB_ATTENUATION,
 100                  1, 255, 1, dac_tlv_fine),
 101 SOC_SINGLE_TLV("Playback Volume", WM8741_DACLMSB_ATTENUATION,
 102                  0, 511, 1, dac_tlv),
 103 };
 104
 105 static const struct snd_kcontrol_new wm8741_snd_controls_mono_right[] = {
 106 SOC_SINGLE_TLV("Fine Playback Volume", WM8741_DACRLSB_ATTENUATION,
 107                 1, 255, 1, dac_tlv_fine),
 108 SOC_SINGLE_TLV("Playback Volume", WM8741_DACRMSB_ATTENUATION,
 109                 0, 511, 1, dac_tlv),
 110 };
 111
 112 static const struct snd_soc_dapm_widget wm8741_dapm_widgets[] = {
 113 SND_SOC_DAPM_DAC("DACL", "Playback", SND_SOC_NOPM, 0, 0),
 114 SND_SOC_DAPM_DAC("DACR", "Playback", SND_SOC_NOPM, 0, 0),
 115 SND_SOC_DAPM_OUTPUT("VOUTLP"),
 116 SND_SOC_DAPM_OUTPUT("VOUTLN"),
 117 SND_SOC_DAPM_OUTPUT("VOUTRP"),
 118 SND_SOC_DAPM_OUTPUT("VOUTRN"),
 119 };
 120
 121 static const struct snd_soc_dapm_route wm8741_dapm_routes[] = {
 122         { "VOUTLP", NULL, "DACL" },
 123         { "VOUTLN", NULL, "DACL" },
 124         { "VOUTRP", NULL, "DACR" },
 125         { "VOUTRN", NULL, "DACR" },
 126 };
 127
 128 static struct {
 129         int value;
 130         int ratio;
 131 } lrclk_ratios[WM8741_NUM_RATES] = {
 132         { 1, 128 },
 133         { 2, 192 },
 134         { 3, 256 },
 135         { 4, 384 },
 136         { 5, 512 },
 137         { 6, 768 },
 138 };
 139
 140 static const unsigned int rates_11289[] = {
 141         44100, 88200,
 142 };
 143
 144 static const struct snd_pcm_hw_constraint_list constraints_11289 = {
 145         .count  = ARRAY_SIZE(rates_11289),
 146         .list   = rates_11289,
 147 };
 148
 149 static const unsigned int rates_12288[] = {
 150         32000, 48000, 96000,
 151 };
 152
 153 static const struct snd_pcm_hw_constraint_list constraints_12288 = {
 154         .count  = ARRAY_SIZE(rates_12288),
 155         .list   = rates_12288,
 156 };
 157
 158 static const unsigned int rates_16384[] = {
 159         32000,
 160 };
 161
 162 static const struct snd_pcm_hw_constraint_list constraints_16384 = {
 163         .count  = ARRAY_SIZE(rates_16384),
 164         .list   = rates_16384,
 165 };
 166
 167 static const unsigned int rates_16934[] = {
 168         44100, 88200,
 169 };
 170
 171 static const struct snd_pcm_hw_constraint_list constraints_16934 = {
 172         .count  = ARRAY_SIZE(rates_16934),
 173         .list   = rates_16934,
 174 };
 175
 176 static const unsigned int rates_18432[] = {
 177         48000, 96000,
 178 };
 179
 180 static const struct snd_pcm_hw_constraint_list constraints_18432 = {
 181         .count  = ARRAY_SIZE(rates_18432),
 182         .list   = rates_18432,
 183 };
 184
 185 static const unsigned int rates_22579[] = {
 186         44100, 88200, 176400
 187 };
 188
 189 static const struct snd_pcm_hw_constraint_list constraints_22579 = {
 190         .count  = ARRAY_SIZE(rates_22579),
 191         .list   = rates_22579,
 192 };
 193
 194 static const unsigned int rates_24576[] = {
 195         32000, 48000, 96000, 192000
 196 };
 197
 198 static const struct snd_pcm_hw_constraint_list constraints_24576 = {
 199         .count  = ARRAY_SIZE(rates_24576),
 200         .list   = rates_24576,
 201 };
 202
 203 static const unsigned int rates_36864[] = {
 204         48000, 96000, 192000
 205 };
 206
 207 static const struct snd_pcm_hw_constraint_list constraints_36864 = {
 208         .count  = ARRAY_SIZE(rates_36864),
 209         .list   = rates_36864,
 210 };
 211
 212
 213 static int wm8741_startup(struct snd_pcm_substream *substream,
 214                           struct snd_soc_dai *dai)
 215 {
 216         struct snd_soc_codec *codec = dai->codec;
 217         struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
 218
 219         /* The set of sample rates that can be supported depends on the
 220          * MCLK supplied to the CODEC - enforce this.
 221          */
 222         if (!wm8741->sysclk) {
 223                 dev_err(codec->dev,
 224                         "No MCLK configured, call set_sysclk() on init\n");
 225                 return -EINVAL;
 226         }
 227
 228         snd_pcm_hw_constraint_list(substream->runtime, 0,
 229                                    SNDRV_PCM_HW_PARAM_RATE,
 230                                    wm8741->sysclk_constraints);
 231
 232         return 0;
 233 }
 234
 235 static int wm8741_hw_params(struct snd_pcm_substream *substream,
 236                             struct snd_pcm_hw_params *params,
 237                             struct snd_soc_dai *dai)
 238 {
 239         struct snd_soc_codec *codec = dai->codec;
 240         struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
 241         u16 iface = snd_soc_read(codec, WM8741_FORMAT_CONTROL) & 0x1FC;
 242         int i;
 243
 244         /* Find a supported LRCLK ratio */
 245         for (i = 0; i < ARRAY_SIZE(lrclk_ratios); i++) {
 246                 if (wm8741->sysclk / params_rate(params) ==
 247                     lrclk_ratios[i].ratio)
 248                         break;
 249         }
 250
 251         /* Should never happen, should be handled by constraints */
 252         if (i == ARRAY_SIZE(lrclk_ratios)) {
 253                 dev_err(codec->dev, "MCLK/fs ratio %d unsupported\n",
 254                         wm8741->sysclk / params_rate(params));
 255                 return -EINVAL;
 256         }
 257
 258         /* bit size */
 259         switch (params_width(params)) {
 260         case 16:
 261                 break;
 262         case 20:
 263                 iface |= 0x0001;
 264                 break;
 265         case 24:
 266                 iface |= 0x0002;
 267                 break;
 268         case 32:
 269                 iface |= 0x0003;
 270                 break;
 271         default:
 272                 dev_dbg(codec->dev, "wm8741_hw_params:    Unsupported bit size param = %d",
 273                         params_width(params));
 274                 return -EINVAL;
 275         }
 276
 277         dev_dbg(codec->dev, "wm8741_hw_params:    bit size param = %d",
 278                 params_width(params));
 279
 280         snd_soc_write(codec, WM8741_FORMAT_CONTROL, iface);
 281         return 0;
 282 }
 283
 284 static int wm8741_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 285                 int clk_id, unsigned int freq, int dir)
 286 {
 287         struct snd_soc_codec *codec = codec_dai->codec;
 288         struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
 289
 290         dev_dbg(codec->dev, "wm8741_set_dai_sysclk info: freq=%dHz\n", freq);
 291
 292         switch (freq) {
 293         case 11289600:
 294                 wm8741->sysclk_constraints = &constraints_11289;
 295                 wm8741->sysclk = freq;
 296                 return 0;
 297
 298         case 12288000:
 299                 wm8741->sysclk_constraints = &constraints_12288;
 300                 wm8741->sysclk = freq;
 301                 return 0;
 302
 303         case 16384000:
 304                 wm8741->sysclk_constraints = &constraints_16384;
 305                 wm8741->sysclk = freq;
 306                 return 0;
 307
 308         case 16934400:
 309                 wm8741->sysclk_constraints = &constraints_16934;
 310                 wm8741->sysclk = freq;
 311                 return 0;
 312
 313         case 18432000:
 314                 wm8741->sysclk_constraints = &constraints_18432;
 315                 wm8741->sysclk = freq;
 316                 return 0;
 317
 318         case 22579200:
 319         case 33868800:
 320                 wm8741->sysclk_constraints = &constraints_22579;
 321                 wm8741->sysclk = freq;
 322                 return 0;
 323
 324         case 24576000:
 325                 wm8741->sysclk_constraints = &constraints_24576;
 326                 wm8741->sysclk = freq;
 327                 return 0;
 328
 329         case 36864000:
 330                 wm8741->sysclk_constraints = &constraints_36864;
 331                 wm8741->sysclk = freq;
 332                 return 0;
 333         }
 334         return -EINVAL;
 335 }
 336
 337 static int wm8741_set_dai_fmt(struct snd_soc_dai *codec_dai,
 338                 unsigned int fmt)
 339 {
 340         struct snd_soc_codec *codec = codec_dai->codec;
 341         u16 iface = snd_soc_read(codec, WM8741_FORMAT_CONTROL) & 0x1C3;
 342
 343         /* check master/slave audio interface */
 344         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 345         case SND_SOC_DAIFMT_CBS_CFS:
 346                 break;
 347         default:
 348                 return -EINVAL;
 349         }
 350
 351         /* interface format */
 352         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 353         case SND_SOC_DAIFMT_I2S:
 354                 iface |= 0x0008;
 355                 break;
 356         case SND_SOC_DAIFMT_RIGHT_J:
 357                 break;
 358         case SND_SOC_DAIFMT_LEFT_J:
 359                 iface |= 0x0004;
 360                 break;
 361         case SND_SOC_DAIFMT_DSP_A:
 362                 iface |= 0x000C;
 363                 break;
 364         case SND_SOC_DAIFMT_DSP_B:
 365                 iface |= 0x001C;
 366                 break;
 367         default:
 368                 return -EINVAL;
 369         }
 370
 371         /* clock inversion */
 372         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 373         case SND_SOC_DAIFMT_NB_NF:
 374                 break;
 375         case SND_SOC_DAIFMT_IB_IF:
 376                 iface |= 0x0010;
 377                 break;
 378         case SND_SOC_DAIFMT_IB_NF:
 379                 iface |= 0x0020;
 380                 break;
 381         case SND_SOC_DAIFMT_NB_IF:
 382                 iface |= 0x0030;
 383                 break;
 384         default:
 385                 return -EINVAL;
 386         }
 387
 388
 389         dev_dbg(codec->dev, "wm8741_set_dai_fmt:    Format=%x, Clock Inv=%x\n",
 390                                 fmt & SND_SOC_DAIFMT_FORMAT_MASK,
 391                                 ((fmt & SND_SOC_DAIFMT_INV_MASK)));
 392
 393         snd_soc_write(codec, WM8741_FORMAT_CONTROL, iface);
 394         return 0;
 395 }
 396
 397 #define WM8741_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
 398                         SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | \
 399                         SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 | \
 400                         SNDRV_PCM_RATE_192000)
 401
 402 #define WM8741_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
 403                         SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
 404
 405 static const struct snd_soc_dai_ops wm8741_dai_ops = {
 406         .startup        = wm8741_startup,
 407         .hw_params      = wm8741_hw_params,
 408         .set_sysclk     = wm8741_set_dai_sysclk,
 409         .set_fmt        = wm8741_set_dai_fmt,
 410 };
 411
 412 static struct snd_soc_dai_driver wm8741_dai = {
 413         .name = "wm8741",
 414         .playback = {
 415                 .stream_name = "Playback",
 416                 .channels_min = 2,
 417                 .channels_max = 2,
 418                 .rates = WM8741_RATES,
 419                 .formats = WM8741_FORMATS,
 420         },
 421         .ops = &wm8741_dai_ops,
 422 };
 423
 424 #ifdef CONFIG_PM
 425 static int wm8741_resume(struct snd_soc_codec *codec)
 426 {
 427         snd_soc_cache_sync(codec);
 428         return 0;
 429 }
 430 #else
 431 #define wm8741_resume NULL
 432 #endif
 433
 434 static int wm8741_configure(struct snd_soc_codec *codec)
 435 {
 436         struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
 437
 438         /* Configure differential mode */
 439         switch (wm8741->pdata.diff_mode) {
 440         case WM8741_DIFF_MODE_STEREO:
 441         case WM8741_DIFF_MODE_STEREO_REVERSED:
 442         case WM8741_DIFF_MODE_MONO_LEFT:
 443         case WM8741_DIFF_MODE_MONO_RIGHT:
 444                 snd_soc_update_bits(codec, WM8741_MODE_CONTROL_2,
 445                                 WM8741_DIFF_MASK,
 446                                 wm8741->pdata.diff_mode << WM8741_DIFF_SHIFT);
 447                 break;
 448         default:
 449                 return -EINVAL;
 450         }
 451
 452         /* Change some default settings - latch VU */
 453         snd_soc_update_bits(codec, WM8741_DACLLSB_ATTENUATION,
 454                         WM8741_UPDATELL, WM8741_UPDATELL);
 455         snd_soc_update_bits(codec, WM8741_DACLMSB_ATTENUATION,
 456                         WM8741_UPDATELM, WM8741_UPDATELM);
 457         snd_soc_update_bits(codec, WM8741_DACRLSB_ATTENUATION,
 458                         WM8741_UPDATERL, WM8741_UPDATERL);
 459         snd_soc_update_bits(codec, WM8741_DACRMSB_ATTENUATION,
 460                         WM8741_UPDATERM, WM8741_UPDATERM);
 461
 462         return 0;
 463 }
 464
 465 static int wm8741_add_controls(struct snd_soc_codec *codec)
 466 {
 467         struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
 468
 469         switch (wm8741->pdata.diff_mode) {
 470         case WM8741_DIFF_MODE_STEREO:
 471         case WM8741_DIFF_MODE_STEREO_REVERSED:
 472                 snd_soc_add_codec_controls(codec,
 473                                 wm8741_snd_controls_stereo,
 474                                 ARRAY_SIZE(wm8741_snd_controls_stereo));
 475                 break;
 476         case WM8741_DIFF_MODE_MONO_LEFT:
 477                 snd_soc_add_codec_controls(codec,
 478                                 wm8741_snd_controls_mono_left,
 479                                 ARRAY_SIZE(wm8741_snd_controls_mono_left));
 480                 break;
 481         case WM8741_DIFF_MODE_MONO_RIGHT:
 482                 snd_soc_add_codec_controls(codec,
 483                                 wm8741_snd_controls_mono_right,
 484                                 ARRAY_SIZE(wm8741_snd_controls_mono_right));
 485                 break;
 486         default:
 487                 return -EINVAL;
 488         }
 489
 490         return 0;
 491 }
 492
 493 static int wm8741_probe(struct snd_soc_codec *codec)
 494 {
 495         struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
 496         int ret = 0;
 497
 498         ret = regulator_bulk_enable(ARRAY_SIZE(wm8741->supplies),
 499                                     wm8741->supplies);
 500         if (ret != 0) {
 501                 dev_err(codec->dev, "Failed to enable supplies: %d\n", ret);
 502                 goto err_get;
 503         }
 504
 505         ret = wm8741_reset(codec);
 506         if (ret < 0) {
 507                 dev_err(codec->dev, "Failed to issue reset\n");
 508                 goto err_enable;
 509         }
 510
 511         ret = wm8741_configure(codec);
 512         if (ret < 0) {
 513                 dev_err(codec->dev, "Failed to change default settings\n");
 514                 goto err_enable;
 515         }
 516
 517         ret = wm8741_add_controls(codec);
 518         if (ret < 0) {
 519                 dev_err(codec->dev, "Failed to add controls\n");
 520                 goto err_enable;
 521         }
 522
 523         dev_dbg(codec->dev, "Successful registration\n");
 524         return ret;
 525
 526 err_enable:
 527         regulator_bulk_disable(ARRAY_SIZE(wm8741->supplies), wm8741->supplies);
 528 err_get:
 529         return ret;
 530 }
 531
 532 static int wm8741_remove(struct snd_soc_codec *codec)
 533 {
 534         struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
 535
 536         regulator_bulk_disable(ARRAY_SIZE(wm8741->supplies), wm8741->supplies);
 537
 538         return 0;
 539 }
 540
 541 static struct snd_soc_codec_driver soc_codec_dev_wm8741 = {
 542         .probe =        wm8741_probe,
 543         .remove =       wm8741_remove,
 544         .resume =       wm8741_resume,
 545
 546         .dapm_widgets = wm8741_dapm_widgets,
 547         .num_dapm_widgets = ARRAY_SIZE(wm8741_dapm_widgets),
 548         .dapm_routes = wm8741_dapm_routes,
 549         .num_dapm_routes = ARRAY_SIZE(wm8741_dapm_routes),
 550 };
 551
 552 static const struct of_device_id wm8741_of_match[] = {
 553         { .compatible = "wlf,wm8741", },
 554         { }
 555 };
 556 MODULE_DEVICE_TABLE(of, wm8741_of_match);
 557
 558 static const struct regmap_config wm8741_regmap = {
 559         .reg_bits = 7,
 560         .val_bits = 9,
 561         .max_register = WM8741_MAX_REGISTER,
 562
 563         .reg_defaults = wm8741_reg_defaults,
 564         .num_reg_defaults = ARRAY_SIZE(wm8741_reg_defaults),
 565         .cache_type = REGCACHE_RBTREE,
 566
 567         .readable_reg = wm8741_readable,
 568 };
 569
 570 static int wm8741_set_pdata(struct device *dev, struct wm8741_priv *wm8741)
 571 {
 572         const struct wm8741_platform_data *pdata = dev_get_platdata(dev);
 573         u32 diff_mode;
 574
 575         if (dev->of_node) {
 576                 if (of_property_read_u32(dev->of_node, "diff-mode", &diff_mode)
 577                                 >= 0)
 578                         wm8741->pdata.diff_mode = diff_mode;
 579         } else {
 580                 if (pdata != NULL)
 581                         memcpy(&wm8741->pdata, pdata, sizeof(wm8741->pdata));
 582         }
 583
 584         return 0;
 585 }
 586
 587 #if IS_ENABLED(CONFIG_I2C)
 588 static int wm8741_i2c_probe(struct i2c_client *i2c,
 589                             const struct i2c_device_id *id)
 590 {
 591         struct wm8741_priv *wm8741;
 592         int ret, i;
 593
 594         wm8741 = devm_kzalloc(&i2c->dev, sizeof(struct wm8741_priv),
 595                               GFP_KERNEL);
 596         if (wm8741 == NULL)
 597                 return -ENOMEM;
 598
 599         for (i = 0; i < ARRAY_SIZE(wm8741->supplies); i++)
 600                 wm8741->supplies[i].supply = wm8741_supply_names[i];
 601
 602         ret = devm_regulator_bulk_get(&i2c->dev, ARRAY_SIZE(wm8741->supplies),
 603                                       wm8741->supplies);
 604         if (ret != 0) {
 605                 dev_err(&i2c->dev, "Failed to request supplies: %d\n", ret);
 606                 return ret;
 607         }
 608
 609         wm8741->regmap = devm_regmap_init_i2c(i2c, &wm8741_regmap);
 610         if (IS_ERR(wm8741->regmap)) {
 611                 ret = PTR_ERR(wm8741->regmap);
 612                 dev_err(&i2c->dev, "Failed to init regmap: %d\n", ret);
 613                 return ret;
 614         }
 615
 616         wm8741_set_pdata(&i2c->dev, wm8741);
 617         if (ret != 0) {
 618                 dev_err(&i2c->dev, "Failed to set pdata: %d\n", ret);
 619                 return ret;
 620         }
 621
 622         i2c_set_clientdata(i2c, wm8741);
 623
 624         ret = snd_soc_register_codec(&i2c->dev,
 625                                      &soc_codec_dev_wm8741, &wm8741_dai, 1);
 626
 627         return ret;
 628 }
 629
 630 static int wm8741_i2c_remove(struct i2c_client *client)
 631 {
 632         snd_soc_unregister_codec(&client->dev);
 633         return 0;
 634 }
 635
 636 static const struct i2c_device_id wm8741_i2c_id[] = {
 637         { "wm8741", 0 },
 638         { }
 639 };
 640 MODULE_DEVICE_TABLE(i2c, wm8741_i2c_id);
 641
 642 static struct i2c_driver wm8741_i2c_driver = {
 643         .driver = {
 644                 .name = "wm8741",
 645                 .owner = THIS_MODULE,
 646                 .of_match_table = wm8741_of_match,
 647         },
 648         .probe =    wm8741_i2c_probe,
 649         .remove =   wm8741_i2c_remove,
 650         .id_table = wm8741_i2c_id,
 651 };
 652 #endif
 653
 654 #if defined(CONFIG_SPI_MASTER)
 655 static int wm8741_spi_probe(struct spi_device *spi)
 656 {
 657         struct wm8741_priv *wm8741;
 658         int ret, i;
 659
 660         wm8741 = devm_kzalloc(&spi->dev, sizeof(struct wm8741_priv),
 661                              GFP_KERNEL);
 662         if (wm8741 == NULL)
 663                 return -ENOMEM;
 664
 665         for (i = 0; i < ARRAY_SIZE(wm8741->supplies); i++)
 666                 wm8741->supplies[i].supply = wm8741_supply_names[i];
 667
 668         ret = devm_regulator_bulk_get(&spi->dev, ARRAY_SIZE(wm8741->supplies),
 669                                       wm8741->supplies);
 670         if (ret != 0) {
 671                 dev_err(&spi->dev, "Failed to request supplies: %d\n", ret);
 672                 return ret;
 673         }
 674
 675         wm8741->regmap = devm_regmap_init_spi(spi, &wm8741_regmap);
 676         if (IS_ERR(wm8741->regmap)) {
 677                 ret = PTR_ERR(wm8741->regmap);
 678                 dev_err(&spi->dev, "Failed to init regmap: %d\n", ret);
 679                 return ret;
 680         }
 681
 682         wm8741_set_pdata(&spi->dev, wm8741);
 683         if (ret != 0) {
 684                 dev_err(&spi->dev, "Failed to set pdata: %d\n", ret);
 685                 return ret;
 686         }
 687
 688         spi_set_drvdata(spi, wm8741);
 689
 690         ret = snd_soc_register_codec(&spi->dev,
 691                         &soc_codec_dev_wm8741, &wm8741_dai, 1);
 692         return ret;
 693 }
 694
 695 static int wm8741_spi_remove(struct spi_device *spi)
 696 {
 697         snd_soc_unregister_codec(&spi->dev);
 698         return 0;
 699 }
 700
 701 static struct spi_driver wm8741_spi_driver = {
 702         .driver = {
 703                 .name   = "wm8741",
 704                 .owner  = THIS_MODULE,
 705                 .of_match_table = wm8741_of_match,
 706         },
 707         .probe          = wm8741_spi_probe,
 708         .remove         = wm8741_spi_remove,
 709 };
 710 #endif /* CONFIG_SPI_MASTER */
 711
 712 static int __init wm8741_modinit(void)
 713 {
 714         int ret = 0;
 715
 716 #if IS_ENABLED(CONFIG_I2C)
 717         ret = i2c_add_driver(&wm8741_i2c_driver);
 718         if (ret != 0)
 719                 pr_err("Failed to register WM8741 I2C driver: %d\n", ret);
 720 #endif
 721 #if defined(CONFIG_SPI_MASTER)
 722         ret = spi_register_driver(&wm8741_spi_driver);
 723         if (ret != 0) {
 724                 printk(KERN_ERR "Failed to register wm8741 SPI driver: %d\n",
 725                        ret);
 726         }
 727 #endif
 728
 729         return ret;
 730 }
 731 module_init(wm8741_modinit);
 732
 733 static void __exit wm8741_exit(void)
 734 {
 735 #if defined(CONFIG_SPI_MASTER)
 736         spi_unregister_driver(&wm8741_spi_driver);
 737 #endif
 738 #if IS_ENABLED(CONFIG_I2C)
 739         i2c_del_driver(&wm8741_i2c_driver);
 740 #endif
 741 }
 742 module_exit(wm8741_exit);
 743
 744 MODULE_DESCRIPTION("ASoC WM8741 driver");
 745 MODULE_AUTHOR("Ian Lartey <ian@opensource.wolfsonmicro.com>");
 746 MODULE_LICENSE("GPL");