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         u16 iface = snd_soc_read(codec, WM8741_FORMAT_CONTROL) & 0x1FC;
 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                 break;
 227         case 20:
 228                 iface |= 0x0001;
 229                 break;
 230         case 24:
 231                 iface |= 0x0002;
 232                 break;
 233         case 32:
 234                 iface |= 0x0003;
 235                 break;
 236         default:
 237                 dev_dbg(codec->dev, "wm8741_hw_params:    Unsupported bit size param = %d",
 238                         params_width(params));
 239                 return -EINVAL;
 240         }
 241
 242         dev_dbg(codec->dev, "wm8741_hw_params:    bit size param = %d, rate param = %d",
 243                 params_width(params), params_rate(params));
 244
 245         snd_soc_write(codec, WM8741_FORMAT_CONTROL, iface);
 246         return 0;
 247 }
 248
 249 static int wm8741_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 250                 int clk_id, unsigned int freq, int dir)
 251 {
 252         struct snd_soc_codec *codec = codec_dai->codec;
 253         struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
 254
 255         dev_dbg(codec->dev, "wm8741_set_dai_sysclk info: freq=%dHz\n", freq);
 256
 257         switch (freq) {
 258         case 0:
 259                 wm8741->sysclk_constraints = NULL;
 260                 break;
 261         case 11289600:
 262                 wm8741->sysclk_constraints = &constraints_11289;
 263                 break;
 264         case 12288000:
 265                 wm8741->sysclk_constraints = &constraints_12288;
 266                 break;
 267         case 16384000:
 268                 wm8741->sysclk_constraints = &constraints_16384;
 269                 break;
 270         case 16934400:
 271                 wm8741->sysclk_constraints = &constraints_16934;
 272                 break;
 273         case 18432000:
 274                 wm8741->sysclk_constraints = &constraints_18432;
 275                 break;
 276         case 22579200:
 277         case 33868800:
 278                 wm8741->sysclk_constraints = &constraints_22579;
 279                 break;
 280         case 24576000:
 281                 wm8741->sysclk_constraints = &constraints_24576;
 282                 break;
 283         case 36864000:
 284                 wm8741->sysclk_constraints = &constraints_36864;
 285                 break;
 286         default:
 287                 return -EINVAL;
 288         }
 289
 290         wm8741->sysclk = freq;
 291         return 0;
 292 }
 293
 294 static int wm8741_set_dai_fmt(struct snd_soc_dai *codec_dai,
 295                 unsigned int fmt)
 296 {
 297         struct snd_soc_codec *codec = codec_dai->codec;
 298         u16 iface = snd_soc_read(codec, WM8741_FORMAT_CONTROL) & 0x1C3;
 299
 300         /* check master/slave audio interface */
 301         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 302         case SND_SOC_DAIFMT_CBS_CFS:
 303                 break;
 304         default:
 305                 return -EINVAL;
 306         }
 307
 308         /* interface format */
 309         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 310         case SND_SOC_DAIFMT_I2S:
 311                 iface |= 0x0008;
 312                 break;
 313         case SND_SOC_DAIFMT_RIGHT_J:
 314                 break;
 315         case SND_SOC_DAIFMT_LEFT_J:
 316                 iface |= 0x0004;
 317                 break;
 318         case SND_SOC_DAIFMT_DSP_A:
 319                 iface |= 0x000C;
 320                 break;
 321         case SND_SOC_DAIFMT_DSP_B:
 322                 iface |= 0x001C;
 323                 break;
 324         default:
 325                 return -EINVAL;
 326         }
 327
 328         /* clock inversion */
 329         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 330         case SND_SOC_DAIFMT_NB_NF:
 331                 break;
 332         case SND_SOC_DAIFMT_IB_IF:
 333                 iface |= 0x0010;
 334                 break;
 335         case SND_SOC_DAIFMT_IB_NF:
 336                 iface |= 0x0020;
 337                 break;
 338         case SND_SOC_DAIFMT_NB_IF:
 339                 iface |= 0x0030;
 340                 break;
 341         default:
 342                 return -EINVAL;
 343         }
 344
 345
 346         dev_dbg(codec->dev, "wm8741_set_dai_fmt:    Format=%x, Clock Inv=%x\n",
 347                                 fmt & SND_SOC_DAIFMT_FORMAT_MASK,
 348                                 ((fmt & SND_SOC_DAIFMT_INV_MASK)));
 349
 350         snd_soc_write(codec, WM8741_FORMAT_CONTROL, iface);
 351         return 0;
 352 }
 353
 354 #define WM8741_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
 355                         SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | \
 356                         SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 | \
 357                         SNDRV_PCM_RATE_192000)
 358
 359 #define WM8741_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
 360                         SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
 361
 362 static const struct snd_soc_dai_ops wm8741_dai_ops = {
 363         .startup        = wm8741_startup,
 364         .hw_params      = wm8741_hw_params,
 365         .set_sysclk     = wm8741_set_dai_sysclk,
 366         .set_fmt        = wm8741_set_dai_fmt,
 367 };
 368
 369 static struct snd_soc_dai_driver wm8741_dai = {
 370         .name = "wm8741",
 371         .playback = {
 372                 .stream_name = "Playback",
 373                 .channels_min = 2,
 374                 .channels_max = 2,
 375                 .rates = WM8741_RATES,
 376                 .formats = WM8741_FORMATS,
 377         },
 378         .ops = &wm8741_dai_ops,
 379 };
 380
 381 #ifdef CONFIG_PM
 382 static int wm8741_resume(struct snd_soc_codec *codec)
 383 {
 384         snd_soc_cache_sync(codec);
 385         return 0;
 386 }
 387 #else
 388 #define wm8741_resume NULL
 389 #endif
 390
 391 static int wm8741_configure(struct snd_soc_codec *codec)
 392 {
 393         struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
 394
 395         /* Configure differential mode */
 396         switch (wm8741->pdata.diff_mode) {
 397         case WM8741_DIFF_MODE_STEREO:
 398         case WM8741_DIFF_MODE_STEREO_REVERSED:
 399         case WM8741_DIFF_MODE_MONO_LEFT:
 400         case WM8741_DIFF_MODE_MONO_RIGHT:
 401                 snd_soc_update_bits(codec, WM8741_MODE_CONTROL_2,
 402                                 WM8741_DIFF_MASK,
 403                                 wm8741->pdata.diff_mode << WM8741_DIFF_SHIFT);
 404                 break;
 405         default:
 406                 return -EINVAL;
 407         }
 408
 409         /* Change some default settings - latch VU */
 410         snd_soc_update_bits(codec, WM8741_DACLLSB_ATTENUATION,
 411                         WM8741_UPDATELL, WM8741_UPDATELL);
 412         snd_soc_update_bits(codec, WM8741_DACLMSB_ATTENUATION,
 413                         WM8741_UPDATELM, WM8741_UPDATELM);
 414         snd_soc_update_bits(codec, WM8741_DACRLSB_ATTENUATION,
 415                         WM8741_UPDATERL, WM8741_UPDATERL);
 416         snd_soc_update_bits(codec, WM8741_DACRMSB_ATTENUATION,
 417                         WM8741_UPDATERM, WM8741_UPDATERM);
 418
 419         return 0;
 420 }
 421
 422 static int wm8741_add_controls(struct snd_soc_codec *codec)
 423 {
 424         struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
 425
 426         switch (wm8741->pdata.diff_mode) {
 427         case WM8741_DIFF_MODE_STEREO:
 428         case WM8741_DIFF_MODE_STEREO_REVERSED:
 429                 snd_soc_add_codec_controls(codec,
 430                                 wm8741_snd_controls_stereo,
 431                                 ARRAY_SIZE(wm8741_snd_controls_stereo));
 432                 break;
 433         case WM8741_DIFF_MODE_MONO_LEFT:
 434                 snd_soc_add_codec_controls(codec,
 435                                 wm8741_snd_controls_mono_left,
 436                                 ARRAY_SIZE(wm8741_snd_controls_mono_left));
 437                 break;
 438         case WM8741_DIFF_MODE_MONO_RIGHT:
 439                 snd_soc_add_codec_controls(codec,
 440                                 wm8741_snd_controls_mono_right,
 441                                 ARRAY_SIZE(wm8741_snd_controls_mono_right));
 442                 break;
 443         default:
 444                 return -EINVAL;
 445         }
 446
 447         return 0;
 448 }
 449
 450 static int wm8741_probe(struct snd_soc_codec *codec)
 451 {
 452         struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
 453         int ret = 0;
 454
 455         ret = regulator_bulk_enable(ARRAY_SIZE(wm8741->supplies),
 456                                     wm8741->supplies);
 457         if (ret != 0) {
 458                 dev_err(codec->dev, "Failed to enable supplies: %d\n", ret);
 459                 goto err_get;
 460         }
 461
 462         ret = wm8741_reset(codec);
 463         if (ret < 0) {
 464                 dev_err(codec->dev, "Failed to issue reset\n");
 465                 goto err_enable;
 466         }
 467
 468         ret = wm8741_configure(codec);
 469         if (ret < 0) {
 470                 dev_err(codec->dev, "Failed to change default settings\n");
 471                 goto err_enable;
 472         }
 473
 474         ret = wm8741_add_controls(codec);
 475         if (ret < 0) {
 476                 dev_err(codec->dev, "Failed to add controls\n");
 477                 goto err_enable;
 478         }
 479
 480         dev_dbg(codec->dev, "Successful registration\n");
 481         return ret;
 482
 483 err_enable:
 484         regulator_bulk_disable(ARRAY_SIZE(wm8741->supplies), wm8741->supplies);
 485 err_get:
 486         return ret;
 487 }
 488
 489 static int wm8741_remove(struct snd_soc_codec *codec)
 490 {
 491         struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
 492
 493         regulator_bulk_disable(ARRAY_SIZE(wm8741->supplies), wm8741->supplies);
 494
 495         return 0;
 496 }
 497
 498 static const struct snd_soc_codec_driver soc_codec_dev_wm8741 = {
 499         .probe =        wm8741_probe,
 500         .remove =       wm8741_remove,
 501         .resume =       wm8741_resume,
 502
 503         .component_driver = {
 504                 .dapm_widgets           = wm8741_dapm_widgets,
 505                 .num_dapm_widgets       = ARRAY_SIZE(wm8741_dapm_widgets),
 506                 .dapm_routes            = wm8741_dapm_routes,
 507                 .num_dapm_routes        = ARRAY_SIZE(wm8741_dapm_routes),
 508         },
 509 };
 510
 511 static const struct of_device_id wm8741_of_match[] = {
 512         { .compatible = "wlf,wm8741", },
 513         { }
 514 };
 515 MODULE_DEVICE_TABLE(of, wm8741_of_match);
 516
 517 static const struct regmap_config wm8741_regmap = {
 518         .reg_bits = 7,
 519         .val_bits = 9,
 520         .max_register = WM8741_MAX_REGISTER,
 521
 522         .reg_defaults = wm8741_reg_defaults,
 523         .num_reg_defaults = ARRAY_SIZE(wm8741_reg_defaults),
 524         .cache_type = REGCACHE_RBTREE,
 525 };
 526
 527 static int wm8741_set_pdata(struct device *dev, struct wm8741_priv *wm8741)
 528 {
 529         const struct wm8741_platform_data *pdata = dev_get_platdata(dev);
 530         u32 diff_mode;
 531
 532         if (dev->of_node) {
 533                 if (of_property_read_u32(dev->of_node, "diff-mode", &diff_mode)
 534                                 >= 0)
 535                         wm8741->pdata.diff_mode = diff_mode;
 536         } else {
 537                 if (pdata != NULL)
 538                         memcpy(&wm8741->pdata, pdata, sizeof(wm8741->pdata));
 539         }
 540
 541         return 0;
 542 }
 543
 544 #if IS_ENABLED(CONFIG_I2C)
 545 static int wm8741_i2c_probe(struct i2c_client *i2c,
 546                             const struct i2c_device_id *id)
 547 {
 548         struct wm8741_priv *wm8741;
 549         int ret, i;
 550
 551         wm8741 = devm_kzalloc(&i2c->dev, sizeof(struct wm8741_priv),
 552                               GFP_KERNEL);
 553         if (wm8741 == NULL)
 554                 return -ENOMEM;
 555
 556         for (i = 0; i < ARRAY_SIZE(wm8741->supplies); i++)
 557                 wm8741->supplies[i].supply = wm8741_supply_names[i];
 558
 559         ret = devm_regulator_bulk_get(&i2c->dev, ARRAY_SIZE(wm8741->supplies),
 560                                       wm8741->supplies);
 561         if (ret != 0) {
 562                 dev_err(&i2c->dev, "Failed to request supplies: %d\n", ret);
 563                 return ret;
 564         }
 565
 566         wm8741->regmap = devm_regmap_init_i2c(i2c, &wm8741_regmap);
 567         if (IS_ERR(wm8741->regmap)) {
 568                 ret = PTR_ERR(wm8741->regmap);
 569                 dev_err(&i2c->dev, "Failed to init regmap: %d\n", ret);
 570                 return ret;
 571         }
 572
 573         ret = wm8741_set_pdata(&i2c->dev, wm8741);
 574         if (ret != 0) {
 575                 dev_err(&i2c->dev, "Failed to set pdata: %d\n", ret);
 576                 return ret;
 577         }
 578
 579         i2c_set_clientdata(i2c, wm8741);
 580
 581         ret = snd_soc_register_codec(&i2c->dev,
 582                                      &soc_codec_dev_wm8741, &wm8741_dai, 1);
 583
 584         return ret;
 585 }
 586
 587 static int wm8741_i2c_remove(struct i2c_client *client)
 588 {
 589         snd_soc_unregister_codec(&client->dev);
 590         return 0;
 591 }
 592
 593 static const struct i2c_device_id wm8741_i2c_id[] = {
 594         { "wm8741", 0 },
 595         { }
 596 };
 597 MODULE_DEVICE_TABLE(i2c, wm8741_i2c_id);
 598
 599 static struct i2c_driver wm8741_i2c_driver = {
 600         .driver = {
 601                 .name = "wm8741",
 602                 .of_match_table = wm8741_of_match,
 603         },
 604         .probe =    wm8741_i2c_probe,
 605         .remove =   wm8741_i2c_remove,
 606         .id_table = wm8741_i2c_id,
 607 };
 608 #endif
 609
 610 #if defined(CONFIG_SPI_MASTER)
 611 static int wm8741_spi_probe(struct spi_device *spi)
 612 {
 613         struct wm8741_priv *wm8741;
 614         int ret, i;
 615
 616         wm8741 = devm_kzalloc(&spi->dev, sizeof(struct wm8741_priv),
 617                              GFP_KERNEL);
 618         if (wm8741 == NULL)
 619                 return -ENOMEM;
 620
 621         for (i = 0; i < ARRAY_SIZE(wm8741->supplies); i++)
 622                 wm8741->supplies[i].supply = wm8741_supply_names[i];
 623
 624         ret = devm_regulator_bulk_get(&spi->dev, ARRAY_SIZE(wm8741->supplies),
 625                                       wm8741->supplies);
 626         if (ret != 0) {
 627                 dev_err(&spi->dev, "Failed to request supplies: %d\n", ret);
 628                 return ret;
 629         }
 630
 631         wm8741->regmap = devm_regmap_init_spi(spi, &wm8741_regmap);
 632         if (IS_ERR(wm8741->regmap)) {
 633                 ret = PTR_ERR(wm8741->regmap);
 634                 dev_err(&spi->dev, "Failed to init regmap: %d\n", ret);
 635                 return ret;
 636         }
 637
 638         ret = wm8741_set_pdata(&spi->dev, wm8741);
 639         if (ret != 0) {
 640                 dev_err(&spi->dev, "Failed to set pdata: %d\n", ret);
 641                 return ret;
 642         }
 643
 644         spi_set_drvdata(spi, wm8741);
 645
 646         ret = snd_soc_register_codec(&spi->dev,
 647                         &soc_codec_dev_wm8741, &wm8741_dai, 1);
 648         return ret;
 649 }
 650
 651 static int wm8741_spi_remove(struct spi_device *spi)
 652 {
 653         snd_soc_unregister_codec(&spi->dev);
 654         return 0;
 655 }
 656
 657 static struct spi_driver wm8741_spi_driver = {
 658         .driver = {
 659                 .name   = "wm8741",
 660                 .of_match_table = wm8741_of_match,
 661         },
 662         .probe          = wm8741_spi_probe,
 663         .remove         = wm8741_spi_remove,
 664 };
 665 #endif /* CONFIG_SPI_MASTER */
 666
 667 static int __init wm8741_modinit(void)
 668 {
 669         int ret = 0;
 670
 671 #if IS_ENABLED(CONFIG_I2C)
 672         ret = i2c_add_driver(&wm8741_i2c_driver);
 673         if (ret != 0)
 674                 pr_err("Failed to register WM8741 I2C driver: %d\n", ret);
 675 #endif
 676 #if defined(CONFIG_SPI_MASTER)
 677         ret = spi_register_driver(&wm8741_spi_driver);
 678         if (ret != 0) {
 679                 printk(KERN_ERR "Failed to register wm8741 SPI driver: %d\n",
 680                        ret);
 681         }
 682 #endif
 683
 684         return ret;
 685 }
 686 module_init(wm8741_modinit);
 687
 688 static void __exit wm8741_exit(void)
 689 {
 690 #if defined(CONFIG_SPI_MASTER)
 691         spi_unregister_driver(&wm8741_spi_driver);
 692 #endif
 693 #if IS_ENABLED(CONFIG_I2C)
 694         i2c_del_driver(&wm8741_i2c_driver);
 695 #endif
 696 }
 697 module_exit(wm8741_exit);
 698
 699 MODULE_DESCRIPTION("ASoC WM8741 driver");
 700 MODULE_AUTHOR("Ian Lartey <ian@opensource.wolfsonmicro.com>");
 701 MODULE_LICENSE("GPL");