sound/soc/codecs/uda134x.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * uda134x.c  --  UDA134X ALSA SoC Codec driver
   4  *
   5  * Modifications by Christian Pellegrin <chripell@evolware.org>
   6  *
   7  * Copyright 2007 Dension Audio Systems Ltd.
   8  * Author: Zoltan Devai
   9  *
  10  * Based on the WM87xx drivers by Liam Girdwood and Richard Purdie
  11  */
  12
  13 #include <linux/module.h>
  14 #include <linux/delay.h>
  15 #include <linux/slab.h>
  16 #include <sound/pcm.h>
  17 #include <sound/pcm_params.h>
  18 #include <sound/soc.h>
  19 #include <sound/initval.h>
  20
  21 #include <sound/uda134x.h>
  22 #include <sound/l3.h>
  23
  24 #include "uda134x.h"
  25
  26
  27 #define UDA134X_RATES SNDRV_PCM_RATE_8000_48000
  28 #define UDA134X_FORMATS (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE | \
  29                 SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S20_3LE)
  30
  31 struct uda134x_priv {
  32         int sysclk;
  33         int dai_fmt;
  34
  35         struct snd_pcm_substream *master_substream;
  36         struct snd_pcm_substream *slave_substream;
  37
  38         struct regmap *regmap;
  39         struct uda134x_platform_data *pd;
  40 };
  41
  42 static const struct reg_default uda134x_reg_defaults[] = {
  43         { UDA134X_EA000, 0x04 },
  44         { UDA134X_EA001, 0x04 },
  45         { UDA134X_EA010, 0x04 },
  46         { UDA134X_EA011, 0x00 },
  47         { UDA134X_EA100, 0x00 },
  48         { UDA134X_EA101, 0x00 },
  49         { UDA134X_EA110, 0x00 },
  50         { UDA134X_EA111, 0x00 },
  51         { UDA134X_STATUS0, 0x00 },
  52         { UDA134X_STATUS1, 0x03 },
  53         { UDA134X_DATA000, 0x00 },
  54         { UDA134X_DATA001, 0x00 },
  55         { UDA134X_DATA010, 0x00 },
  56         { UDA134X_DATA011, 0x00 },
  57         { UDA134X_DATA1, 0x00 },
  58 };
  59
  60 /*
  61  * Write to the uda134x registers
  62  *
  63  */
  64 static int uda134x_regmap_write(void *context, unsigned int reg,
  65         unsigned int value)
  66 {
  67         struct uda134x_platform_data *pd = context;
  68         int ret;
  69         u8 addr;
  70         u8 data = value;
  71
  72         switch (reg) {
  73         case UDA134X_STATUS0:
  74         case UDA134X_STATUS1:
  75                 addr = UDA134X_STATUS_ADDR;
  76                 data |= (reg - UDA134X_STATUS0) << 7;
  77                 break;
  78         case UDA134X_DATA000:
  79         case UDA134X_DATA001:
  80         case UDA134X_DATA010:
  81         case UDA134X_DATA011:
  82                 addr = UDA134X_DATA0_ADDR;
  83                 data |= (reg - UDA134X_DATA000) << 6;
  84                 break;
  85         case UDA134X_DATA1:
  86                 addr = UDA134X_DATA1_ADDR;
  87                 break;
  88         default:
  89                 /* It's an extended address register */
  90                 addr =  (reg | UDA134X_EXTADDR_PREFIX);
  91
  92                 ret = l3_write(&pd->l3,
  93                                UDA134X_DATA0_ADDR, &addr, 1);
  94                 if (ret != 1)
  95                         return -EIO;
  96
  97                 addr = UDA134X_DATA0_ADDR;
  98                 data = (value | UDA134X_EXTDATA_PREFIX);
  99                 break;
 100         }
 101
 102         ret = l3_write(&pd->l3,
 103                        addr, &data, 1);
 104         if (ret != 1)
 105                 return -EIO;
 106
 107         return 0;
 108 }
 109
 110 static inline void uda134x_reset(struct snd_soc_component *component)
 111 {
 112         struct uda134x_priv *uda134x = snd_soc_component_get_drvdata(component);
 113         unsigned int mask = 1<<6;
 114
 115         regmap_update_bits(uda134x->regmap, UDA134X_STATUS0, mask, mask);
 116         msleep(1);
 117         regmap_update_bits(uda134x->regmap, UDA134X_STATUS0, mask, 0);
 118 }
 119
 120 static int uda134x_mute(struct snd_soc_dai *dai, int mute, int direction)
 121 {
 122         struct uda134x_priv *uda134x = snd_soc_component_get_drvdata(dai->component);
 123         unsigned int mask = 1<<2;
 124         unsigned int val;
 125
 126         pr_debug("%s mute: %d\n", __func__, mute);
 127
 128         if (mute)
 129                 val = mask;
 130         else
 131                 val = 0;
 132
 133         return regmap_update_bits(uda134x->regmap, UDA134X_DATA010, mask, val);
 134 }
 135
 136 static int uda134x_startup(struct snd_pcm_substream *substream,
 137         struct snd_soc_dai *dai)
 138 {
 139         struct snd_soc_component *component = dai->component;
 140         struct uda134x_priv *uda134x = snd_soc_component_get_drvdata(component);
 141         struct snd_pcm_runtime *master_runtime;
 142
 143         if (uda134x->master_substream) {
 144                 master_runtime = uda134x->master_substream->runtime;
 145
 146                 pr_debug("%s constraining to %d bits at %d\n", __func__,
 147                          master_runtime->sample_bits,
 148                          master_runtime->rate);
 149
 150                 snd_pcm_hw_constraint_single(substream->runtime,
 151                                              SNDRV_PCM_HW_PARAM_RATE,
 152                                              master_runtime->rate);
 153
 154                 snd_pcm_hw_constraint_single(substream->runtime,
 155                                              SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
 156                                              master_runtime->sample_bits);
 157
 158                 uda134x->slave_substream = substream;
 159         } else
 160                 uda134x->master_substream = substream;
 161
 162         return 0;
 163 }
 164
 165 static void uda134x_shutdown(struct snd_pcm_substream *substream,
 166         struct snd_soc_dai *dai)
 167 {
 168         struct snd_soc_component *component = dai->component;
 169         struct uda134x_priv *uda134x = snd_soc_component_get_drvdata(component);
 170
 171         if (uda134x->master_substream == substream)
 172                 uda134x->master_substream = uda134x->slave_substream;
 173
 174         uda134x->slave_substream = NULL;
 175 }
 176
 177 static int uda134x_hw_params(struct snd_pcm_substream *substream,
 178         struct snd_pcm_hw_params *params,
 179         struct snd_soc_dai *dai)
 180 {
 181         struct snd_soc_component *component = dai->component;
 182         struct uda134x_priv *uda134x = snd_soc_component_get_drvdata(component);
 183         unsigned int hw_params = 0;
 184
 185         if (substream == uda134x->slave_substream) {
 186                 pr_debug("%s ignoring hw_params for slave substream\n",
 187                          __func__);
 188                 return 0;
 189         }
 190
 191         pr_debug("%s sysclk: %d, rate:%d\n", __func__,
 192                  uda134x->sysclk, params_rate(params));
 193
 194         /* set SYSCLK / fs ratio */
 195         switch (uda134x->sysclk / params_rate(params)) {
 196         case 512:
 197                 break;
 198         case 384:
 199                 hw_params |= (1<<4);
 200                 break;
 201         case 256:
 202                 hw_params |= (1<<5);
 203                 break;
 204         default:
 205                 printk(KERN_ERR "%s unsupported fs\n", __func__);
 206                 return -EINVAL;
 207         }
 208
 209         pr_debug("%s dai_fmt: %d, params_format:%d\n", __func__,
 210                  uda134x->dai_fmt, params_format(params));
 211
 212         /* set DAI format and word length */
 213         switch (uda134x->dai_fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 214         case SND_SOC_DAIFMT_I2S:
 215                 break;
 216         case SND_SOC_DAIFMT_RIGHT_J:
 217                 switch (params_width(params)) {
 218                 case 16:
 219                         hw_params |= (1<<1);
 220                         break;
 221                 case 18:
 222                         hw_params |= (1<<2);
 223                         break;
 224                 case 20:
 225                         hw_params |= ((1<<2) | (1<<1));
 226                         break;
 227                 default:
 228                         printk(KERN_ERR "%s unsupported format (right)\n",
 229                                __func__);
 230                         return -EINVAL;
 231                 }
 232                 break;
 233         case SND_SOC_DAIFMT_LEFT_J:
 234                 hw_params |= (1<<3);
 235                 break;
 236         default:
 237                 printk(KERN_ERR "%s unsupported format\n", __func__);
 238                 return -EINVAL;
 239         }
 240
 241         return regmap_update_bits(uda134x->regmap, UDA134X_STATUS0,
 242                 STATUS0_SYSCLK_MASK | STATUS0_DAIFMT_MASK, hw_params);
 243 }
 244
 245 static int uda134x_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 246                                   int clk_id, unsigned int freq, int dir)
 247 {
 248         struct snd_soc_component *component = codec_dai->component;
 249         struct uda134x_priv *uda134x = snd_soc_component_get_drvdata(component);
 250
 251         pr_debug("%s clk_id: %d, freq: %u, dir: %d\n", __func__,
 252                  clk_id, freq, dir);
 253
 254         /* Anything between 256fs*8Khz and 512fs*48Khz should be acceptable
 255            because the codec is slave. Of course limitations of the clock
 256            master (the IIS controller) apply.
 257            We'll error out on set_hw_params if it's not OK */
 258         if ((freq >= (256 * 8000)) && (freq <= (512 * 48000))) {
 259                 uda134x->sysclk = freq;
 260                 return 0;
 261         }
 262
 263         printk(KERN_ERR "%s unsupported sysclk\n", __func__);
 264         return -EINVAL;
 265 }
 266
 267 static int uda134x_set_dai_fmt(struct snd_soc_dai *codec_dai,
 268                                unsigned int fmt)
 269 {
 270         struct snd_soc_component *component = codec_dai->component;
 271         struct uda134x_priv *uda134x = snd_soc_component_get_drvdata(component);
 272
 273         pr_debug("%s fmt: %08X\n", __func__, fmt);
 274
 275         /* codec supports only full slave mode */
 276         if ((fmt & SND_SOC_DAIFMT_MASTER_MASK) != SND_SOC_DAIFMT_CBS_CFS) {
 277                 printk(KERN_ERR "%s unsupported slave mode\n", __func__);
 278                 return -EINVAL;
 279         }
 280
 281         /* no support for clock inversion */
 282         if ((fmt & SND_SOC_DAIFMT_INV_MASK) != SND_SOC_DAIFMT_NB_NF) {
 283                 printk(KERN_ERR "%s unsupported clock inversion\n", __func__);
 284                 return -EINVAL;
 285         }
 286
 287         /* We can't setup DAI format here as it depends on the word bit num */
 288         /* so let's just store the value for later */
 289         uda134x->dai_fmt = fmt;
 290
 291         return 0;
 292 }
 293
 294 static int uda134x_set_bias_level(struct snd_soc_component *component,
 295                                   enum snd_soc_bias_level level)
 296 {
 297         struct uda134x_priv *uda134x = snd_soc_component_get_drvdata(component);
 298         struct uda134x_platform_data *pd = uda134x->pd;
 299         pr_debug("%s bias level %d\n", __func__, level);
 300
 301         switch (level) {
 302         case SND_SOC_BIAS_ON:
 303                 break;
 304         case SND_SOC_BIAS_PREPARE:
 305                 /* power on */
 306                 if (pd->power) {
 307                         pd->power(1);
 308                         regcache_sync(uda134x->regmap);
 309                 }
 310                 break;
 311         case SND_SOC_BIAS_STANDBY:
 312                 break;
 313         case SND_SOC_BIAS_OFF:
 314                 /* power off */
 315                 if (pd->power) {
 316                         pd->power(0);
 317                         regcache_mark_dirty(uda134x->regmap);
 318                 }
 319                 break;
 320         }
 321         return 0;
 322 }
 323
 324 static const char *uda134x_dsp_setting[] = {"Flat", "Minimum1",
 325                                             "Minimum2", "Maximum"};
 326 static const char *uda134x_deemph[] = {"None", "32Khz", "44.1Khz", "48Khz"};
 327 static const char *uda134x_mixmode[] = {"Differential", "Analog1",
 328                                         "Analog2", "Both"};
 329
 330 static const struct soc_enum uda134x_mixer_enum[] = {
 331 SOC_ENUM_SINGLE(UDA134X_DATA010, 0, 0x04, uda134x_dsp_setting),
 332 SOC_ENUM_SINGLE(UDA134X_DATA010, 3, 0x04, uda134x_deemph),
 333 SOC_ENUM_SINGLE(UDA134X_EA010, 0, 0x04, uda134x_mixmode),
 334 };
 335
 336 static const struct snd_kcontrol_new uda1341_snd_controls[] = {
 337 SOC_SINGLE("Master Playback Volume", UDA134X_DATA000, 0, 0x3F, 1),
 338 SOC_SINGLE("Capture Volume", UDA134X_EA010, 2, 0x07, 0),
 339 SOC_SINGLE("Analog1 Volume", UDA134X_EA000, 0, 0x1F, 1),
 340 SOC_SINGLE("Analog2 Volume", UDA134X_EA001, 0, 0x1F, 1),
 341
 342 SOC_SINGLE("Mic Sensitivity", UDA134X_EA010, 2, 7, 0),
 343 SOC_SINGLE("Mic Volume", UDA134X_EA101, 0, 0x1F, 0),
 344
 345 SOC_SINGLE("Tone Control - Bass", UDA134X_DATA001, 2, 0xF, 0),
 346 SOC_SINGLE("Tone Control - Treble", UDA134X_DATA001, 0, 3, 0),
 347
 348 SOC_ENUM("Sound Processing Filter", uda134x_mixer_enum[0]),
 349 SOC_ENUM("PCM Playback De-emphasis", uda134x_mixer_enum[1]),
 350 SOC_ENUM("Input Mux", uda134x_mixer_enum[2]),
 351
 352 SOC_SINGLE("AGC Switch", UDA134X_EA100, 4, 1, 0),
 353 SOC_SINGLE("AGC Target Volume", UDA134X_EA110, 0, 0x03, 1),
 354 SOC_SINGLE("AGC Timing", UDA134X_EA110, 2, 0x07, 0),
 355
 356 SOC_SINGLE("DAC +6dB Switch", UDA134X_STATUS1, 6, 1, 0),
 357 SOC_SINGLE("ADC +6dB Switch", UDA134X_STATUS1, 5, 1, 0),
 358 SOC_SINGLE("ADC Polarity Switch", UDA134X_STATUS1, 4, 1, 0),
 359 SOC_SINGLE("DAC Polarity Switch", UDA134X_STATUS1, 3, 1, 0),
 360 SOC_SINGLE("Double Speed Playback Switch", UDA134X_STATUS1, 2, 1, 0),
 361 SOC_SINGLE("DC Filter Enable Switch", UDA134X_STATUS0, 0, 1, 0),
 362 };
 363
 364 static const struct snd_kcontrol_new uda1340_snd_controls[] = {
 365 SOC_SINGLE("Master Playback Volume", UDA134X_DATA000, 0, 0x3F, 1),
 366
 367 SOC_SINGLE("Tone Control - Bass", UDA134X_DATA001, 2, 0xF, 0),
 368 SOC_SINGLE("Tone Control - Treble", UDA134X_DATA001, 0, 3, 0),
 369
 370 SOC_ENUM("Sound Processing Filter", uda134x_mixer_enum[0]),
 371 SOC_ENUM("PCM Playback De-emphasis", uda134x_mixer_enum[1]),
 372
 373 SOC_SINGLE("DC Filter Enable Switch", UDA134X_STATUS0, 0, 1, 0),
 374 };
 375
 376 static const struct snd_kcontrol_new uda1345_snd_controls[] = {
 377 SOC_SINGLE("Master Playback Volume", UDA134X_DATA000, 0, 0x3F, 1),
 378
 379 SOC_ENUM("PCM Playback De-emphasis", uda134x_mixer_enum[1]),
 380
 381 SOC_SINGLE("DC Filter Enable Switch", UDA134X_STATUS0, 0, 1, 0),
 382 };
 383
 384 /* UDA1341 has the DAC/ADC power down in STATUS1 */
 385 static const struct snd_soc_dapm_widget uda1341_dapm_widgets[] = {
 386         SND_SOC_DAPM_DAC("DAC", "Playback", UDA134X_STATUS1, 0, 0),
 387         SND_SOC_DAPM_ADC("ADC", "Capture", UDA134X_STATUS1, 1, 0),
 388 };
 389
 390 /* UDA1340/4/5 has the DAC/ADC pwoer down in DATA0 11 */
 391 static const struct snd_soc_dapm_widget uda1340_dapm_widgets[] = {
 392         SND_SOC_DAPM_DAC("DAC", "Playback", UDA134X_DATA011, 0, 0),
 393         SND_SOC_DAPM_ADC("ADC", "Capture", UDA134X_DATA011, 1, 0),
 394 };
 395
 396 /* Common DAPM widgets */
 397 static const struct snd_soc_dapm_widget uda134x_dapm_widgets[] = {
 398         SND_SOC_DAPM_INPUT("VINL1"),
 399         SND_SOC_DAPM_INPUT("VINR1"),
 400         SND_SOC_DAPM_INPUT("VINL2"),
 401         SND_SOC_DAPM_INPUT("VINR2"),
 402         SND_SOC_DAPM_OUTPUT("VOUTL"),
 403         SND_SOC_DAPM_OUTPUT("VOUTR"),
 404 };
 405
 406 static const struct snd_soc_dapm_route uda134x_dapm_routes[] = {
 407         { "ADC", NULL, "VINL1" },
 408         { "ADC", NULL, "VINR1" },
 409         { "ADC", NULL, "VINL2" },
 410         { "ADC", NULL, "VINR2" },
 411         { "VOUTL", NULL, "DAC" },
 412         { "VOUTR", NULL, "DAC" },
 413 };
 414
 415 static const struct snd_soc_dai_ops uda134x_dai_ops = {
 416         .startup        = uda134x_startup,
 417         .shutdown       = uda134x_shutdown,
 418         .hw_params      = uda134x_hw_params,
 419         .mute_stream    = uda134x_mute,
 420         .set_sysclk     = uda134x_set_dai_sysclk,
 421         .set_fmt        = uda134x_set_dai_fmt,
 422         .no_capture_mute = 1,
 423 };
 424
 425 static struct snd_soc_dai_driver uda134x_dai = {
 426         .name = "uda134x-hifi",
 427         /* playback capabilities */
 428         .playback = {
 429                 .stream_name = "Playback",
 430                 .channels_min = 1,
 431                 .channels_max = 2,
 432                 .rates = UDA134X_RATES,
 433                 .formats = UDA134X_FORMATS,
 434         },
 435         /* capture capabilities */
 436         .capture = {
 437                 .stream_name = "Capture",
 438                 .channels_min = 1,
 439                 .channels_max = 2,
 440                 .rates = UDA134X_RATES,
 441                 .formats = UDA134X_FORMATS,
 442         },
 443         /* pcm operations */
 444         .ops = &uda134x_dai_ops,
 445 };
 446
 447 static int uda134x_soc_probe(struct snd_soc_component *component)
 448 {
 449         struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(component);
 450         struct uda134x_priv *uda134x = snd_soc_component_get_drvdata(component);
 451         struct uda134x_platform_data *pd = uda134x->pd;
 452         const struct snd_soc_dapm_widget *widgets;
 453         unsigned num_widgets;
 454         int ret;
 455
 456         printk(KERN_INFO "UDA134X SoC Audio Codec\n");
 457
 458         switch (pd->model) {
 459         case UDA134X_UDA1340:
 460         case UDA134X_UDA1341:
 461         case UDA134X_UDA1344:
 462         case UDA134X_UDA1345:
 463                 break;
 464         default:
 465                 printk(KERN_ERR "UDA134X SoC codec: "
 466                        "unsupported model %d\n",
 467                         pd->model);
 468                 return -EINVAL;
 469         }
 470
 471         if (pd->power)
 472                 pd->power(1);
 473
 474         uda134x_reset(component);
 475
 476         if (pd->model == UDA134X_UDA1341) {
 477                 widgets = uda1341_dapm_widgets;
 478                 num_widgets = ARRAY_SIZE(uda1341_dapm_widgets);
 479         } else {
 480                 widgets = uda1340_dapm_widgets;
 481                 num_widgets = ARRAY_SIZE(uda1340_dapm_widgets);
 482         }
 483
 484         ret = snd_soc_dapm_new_controls(dapm, widgets, num_widgets);
 485         if (ret) {
 486                 printk(KERN_ERR "%s failed to register dapm controls: %d",
 487                         __func__, ret);
 488                 return ret;
 489         }
 490
 491         switch (pd->model) {
 492         case UDA134X_UDA1340:
 493         case UDA134X_UDA1344:
 494                 ret = snd_soc_add_component_controls(component, uda1340_snd_controls,
 495                                         ARRAY_SIZE(uda1340_snd_controls));
 496         break;
 497         case UDA134X_UDA1341:
 498                 ret = snd_soc_add_component_controls(component, uda1341_snd_controls,
 499                                         ARRAY_SIZE(uda1341_snd_controls));
 500         break;
 501         case UDA134X_UDA1345:
 502                 ret = snd_soc_add_component_controls(component, uda1345_snd_controls,
 503                                         ARRAY_SIZE(uda1345_snd_controls));
 504         break;
 505         default:
 506                 printk(KERN_ERR "%s unknown codec type: %d",
 507                         __func__, pd->model);
 508                 return -EINVAL;
 509         }
 510
 511         if (ret < 0) {
 512                 printk(KERN_ERR "UDA134X: failed to register controls\n");
 513                 return ret;
 514         }
 515
 516         return 0;
 517 }
 518
 519 static const struct snd_soc_component_driver soc_component_dev_uda134x = {
 520         .probe                  = uda134x_soc_probe,
 521         .set_bias_level         = uda134x_set_bias_level,
 522         .dapm_widgets           = uda134x_dapm_widgets,
 523         .num_dapm_widgets       = ARRAY_SIZE(uda134x_dapm_widgets),
 524         .dapm_routes            = uda134x_dapm_routes,
 525         .num_dapm_routes        = ARRAY_SIZE(uda134x_dapm_routes),
 526         .suspend_bias_off       = 1,
 527         .idle_bias_on           = 1,
 528         .use_pmdown_time        = 1,
 529         .endianness             = 1,
 530         .non_legacy_dai_naming  = 1,
 531 };
 532
 533 static const struct regmap_config uda134x_regmap_config = {
 534         .reg_bits = 8,
 535         .val_bits = 8,
 536         .max_register = UDA134X_DATA1,
 537         .reg_defaults = uda134x_reg_defaults,
 538         .num_reg_defaults = ARRAY_SIZE(uda134x_reg_defaults),
 539         .cache_type = REGCACHE_RBTREE,
 540
 541         .reg_write = uda134x_regmap_write,
 542 };
 543
 544 static int uda134x_codec_probe(struct platform_device *pdev)
 545 {
 546         struct uda134x_platform_data *pd = pdev->dev.platform_data;
 547         struct uda134x_priv *uda134x;
 548         int ret;
 549
 550         if (!pd) {
 551                 dev_err(&pdev->dev, "Missing L3 bitbang function\n");
 552                 return -ENODEV;
 553         }
 554
 555         uda134x = devm_kzalloc(&pdev->dev, sizeof(*uda134x), GFP_KERNEL);
 556         if (!uda134x)
 557                 return -ENOMEM;
 558
 559         uda134x->pd = pd;
 560         platform_set_drvdata(pdev, uda134x);
 561
 562         if (pd->l3.use_gpios) {
 563                 ret = l3_set_gpio_ops(&pdev->dev, &uda134x->pd->l3);
 564                 if (ret < 0)
 565                         return ret;
 566         }
 567
 568         uda134x->regmap = devm_regmap_init(&pdev->dev, NULL, pd,
 569                 &uda134x_regmap_config);
 570         if (IS_ERR(uda134x->regmap))
 571                 return PTR_ERR(uda134x->regmap);
 572
 573         return devm_snd_soc_register_component(&pdev->dev,
 574                         &soc_component_dev_uda134x, &uda134x_dai, 1);
 575 }
 576
 577 static struct platform_driver uda134x_codec_driver = {
 578         .driver = {
 579                 .name = "uda134x-codec",
 580         },
 581         .probe = uda134x_codec_probe,
 582 };
 583
 584 module_platform_driver(uda134x_codec_driver);
 585
 586 MODULE_DESCRIPTION("UDA134X ALSA soc codec driver");
 587 MODULE_AUTHOR("Zoltan Devai, Christian Pellegrin <chripell@evolware.org>");
 588 MODULE_LICENSE("GPL");