sound/soc/codecs/ssm4567.c

   1 /*
   2  * SSM4567 amplifier audio driver
   3  *
   4  * Copyright 2014 Google Chromium project.
   5  *  Author: Anatol Pomozov <anatol@chromium.org>
   6  *
   7  * Based on code copyright/by:
   8  *   Copyright 2013 Analog Devices Inc.
   9  *
  10  * Licensed under the GPL-2.
  11  */
  12
  13 #include <linux/acpi.h>
  14 #include <linux/module.h>
  15 #include <linux/init.h>
  16 #include <linux/i2c.h>
  17 #include <linux/regmap.h>
  18 #include <linux/slab.h>
  19 #include <sound/core.h>
  20 #include <sound/pcm.h>
  21 #include <sound/pcm_params.h>
  22 #include <sound/soc.h>
  23 #include <sound/initval.h>
  24 #include <sound/tlv.h>
  25
  26 #define SSM4567_REG_POWER_CTRL          0x00
  27 #define SSM4567_REG_AMP_SNS_CTRL                0x01
  28 #define SSM4567_REG_DAC_CTRL            0x02
  29 #define SSM4567_REG_DAC_VOLUME          0x03
  30 #define SSM4567_REG_SAI_CTRL_1          0x04
  31 #define SSM4567_REG_SAI_CTRL_2          0x05
  32 #define SSM4567_REG_SAI_PLACEMENT_1             0x06
  33 #define SSM4567_REG_SAI_PLACEMENT_2             0x07
  34 #define SSM4567_REG_SAI_PLACEMENT_3             0x08
  35 #define SSM4567_REG_SAI_PLACEMENT_4             0x09
  36 #define SSM4567_REG_SAI_PLACEMENT_5             0x0a
  37 #define SSM4567_REG_SAI_PLACEMENT_6             0x0b
  38 #define SSM4567_REG_BATTERY_V_OUT               0x0c
  39 #define SSM4567_REG_LIMITER_CTRL_1              0x0d
  40 #define SSM4567_REG_LIMITER_CTRL_2              0x0e
  41 #define SSM4567_REG_LIMITER_CTRL_3              0x0f
  42 #define SSM4567_REG_STATUS_1            0x10
  43 #define SSM4567_REG_STATUS_2            0x11
  44 #define SSM4567_REG_FAULT_CTRL          0x12
  45 #define SSM4567_REG_PDM_CTRL            0x13
  46 #define SSM4567_REG_MCLK_RATIO          0x14
  47 #define SSM4567_REG_BOOST_CTRL_1                0x15
  48 #define SSM4567_REG_BOOST_CTRL_2                0x16
  49 #define SSM4567_REG_SOFT_RESET          0xff
  50
  51 /* POWER_CTRL */
  52 #define SSM4567_POWER_APWDN_EN          BIT(7)
  53 #define SSM4567_POWER_BSNS_PWDN         BIT(6)
  54 #define SSM4567_POWER_VSNS_PWDN         BIT(5)
  55 #define SSM4567_POWER_ISNS_PWDN         BIT(4)
  56 #define SSM4567_POWER_BOOST_PWDN                BIT(3)
  57 #define SSM4567_POWER_AMP_PWDN          BIT(2)
  58 #define SSM4567_POWER_VBAT_ONLY         BIT(1)
  59 #define SSM4567_POWER_SPWDN                     BIT(0)
  60
  61 /* DAC_CTRL */
  62 #define SSM4567_DAC_HV                  BIT(7)
  63 #define SSM4567_DAC_MUTE                BIT(6)
  64 #define SSM4567_DAC_HPF                 BIT(5)
  65 #define SSM4567_DAC_LPM                 BIT(4)
  66 #define SSM4567_DAC_FS_MASK     0x7
  67 #define SSM4567_DAC_FS_8000_12000       0x0
  68 #define SSM4567_DAC_FS_16000_24000      0x1
  69 #define SSM4567_DAC_FS_32000_48000      0x2
  70 #define SSM4567_DAC_FS_64000_96000      0x3
  71 #define SSM4567_DAC_FS_128000_192000    0x4
  72
  73 /* SAI_CTRL_1 */
  74 #define SSM4567_SAI_CTRL_1_BCLK                 BIT(6)
  75 #define SSM4567_SAI_CTRL_1_TDM_BLCKS_MASK       (0x3 << 4)
  76 #define SSM4567_SAI_CTRL_1_TDM_BLCKS_32         (0x0 << 4)
  77 #define SSM4567_SAI_CTRL_1_TDM_BLCKS_48         (0x1 << 4)
  78 #define SSM4567_SAI_CTRL_1_TDM_BLCKS_64         (0x2 << 4)
  79 #define SSM4567_SAI_CTRL_1_FSYNC                BIT(3)
  80 #define SSM4567_SAI_CTRL_1_LJ                   BIT(2)
  81 #define SSM4567_SAI_CTRL_1_TDM                  BIT(1)
  82 #define SSM4567_SAI_CTRL_1_PDM                  BIT(0)
  83
  84 /* SAI_CTRL_2 */
  85 #define SSM4567_SAI_CTRL_2_AUTO_SLOT            BIT(3)
  86 #define SSM4567_SAI_CTRL_2_TDM_SLOT_MASK        0x7
  87 #define SSM4567_SAI_CTRL_2_TDM_SLOT(x)          (x)
  88
  89 struct ssm4567 {
  90         struct regmap *regmap;
  91 };
  92
  93 static const struct reg_default ssm4567_reg_defaults[] = {
  94         { SSM4567_REG_POWER_CTRL,       0x81 },
  95         { SSM4567_REG_AMP_SNS_CTRL, 0x09 },
  96         { SSM4567_REG_DAC_CTRL, 0x32 },
  97         { SSM4567_REG_DAC_VOLUME, 0x40 },
  98         { SSM4567_REG_SAI_CTRL_1, 0x00 },
  99         { SSM4567_REG_SAI_CTRL_2, 0x08 },
 100         { SSM4567_REG_SAI_PLACEMENT_1, 0x01 },
 101         { SSM4567_REG_SAI_PLACEMENT_2, 0x20 },
 102         { SSM4567_REG_SAI_PLACEMENT_3, 0x32 },
 103         { SSM4567_REG_SAI_PLACEMENT_4, 0x07 },
 104         { SSM4567_REG_SAI_PLACEMENT_5, 0x07 },
 105         { SSM4567_REG_SAI_PLACEMENT_6, 0x07 },
 106         { SSM4567_REG_BATTERY_V_OUT, 0x00 },
 107         { SSM4567_REG_LIMITER_CTRL_1, 0xa4 },
 108         { SSM4567_REG_LIMITER_CTRL_2, 0x73 },
 109         { SSM4567_REG_LIMITER_CTRL_3, 0x00 },
 110         { SSM4567_REG_STATUS_1, 0x00 },
 111         { SSM4567_REG_STATUS_2, 0x00 },
 112         { SSM4567_REG_FAULT_CTRL, 0x30 },
 113         { SSM4567_REG_PDM_CTRL, 0x40 },
 114         { SSM4567_REG_MCLK_RATIO, 0x11 },
 115         { SSM4567_REG_BOOST_CTRL_1, 0x03 },
 116         { SSM4567_REG_BOOST_CTRL_2, 0x00 },
 117         { SSM4567_REG_SOFT_RESET, 0x00 },
 118 };
 119
 120
 121 static bool ssm4567_readable_reg(struct device *dev, unsigned int reg)
 122 {
 123         switch (reg) {
 124         case SSM4567_REG_POWER_CTRL ... SSM4567_REG_BOOST_CTRL_2:
 125                 return true;
 126         default:
 127                 return false;
 128         }
 129
 130 }
 131
 132 static bool ssm4567_writeable_reg(struct device *dev, unsigned int reg)
 133 {
 134         switch (reg) {
 135         case SSM4567_REG_POWER_CTRL ... SSM4567_REG_SAI_PLACEMENT_6:
 136         case SSM4567_REG_LIMITER_CTRL_1 ... SSM4567_REG_LIMITER_CTRL_3:
 137         case SSM4567_REG_FAULT_CTRL ... SSM4567_REG_BOOST_CTRL_2:
 138         /* The datasheet states that soft reset register is read-only,
 139          * but logically it is write-only. */
 140         case SSM4567_REG_SOFT_RESET:
 141                 return true;
 142         default:
 143                 return false;
 144         }
 145 }
 146
 147 static bool ssm4567_volatile_reg(struct device *dev, unsigned int reg)
 148 {
 149         switch (reg) {
 150         case SSM4567_REG_BATTERY_V_OUT:
 151         case SSM4567_REG_STATUS_1 ... SSM4567_REG_STATUS_2:
 152         case SSM4567_REG_SOFT_RESET:
 153                 return true;
 154         default:
 155                 return false;
 156         }
 157 }
 158
 159 static const DECLARE_TLV_DB_MINMAX_MUTE(ssm4567_vol_tlv, -7125, 2400);
 160
 161 static const struct snd_kcontrol_new ssm4567_snd_controls[] = {
 162         SOC_SINGLE_TLV("Master Playback Volume", SSM4567_REG_DAC_VOLUME, 0,
 163                 0xff, 1, ssm4567_vol_tlv),
 164         SOC_SINGLE("DAC Low Power Mode Switch", SSM4567_REG_DAC_CTRL, 4, 1, 0),
 165         SOC_SINGLE("DAC High Pass Filter Switch", SSM4567_REG_DAC_CTRL,
 166                 5, 1, 0),
 167 };
 168
 169 static const struct snd_kcontrol_new ssm4567_amplifier_boost_control =
 170         SOC_DAPM_SINGLE("Switch", SSM4567_REG_POWER_CTRL, 1, 1, 1);
 171
 172 static const struct snd_soc_dapm_widget ssm4567_dapm_widgets[] = {
 173         SND_SOC_DAPM_DAC("DAC", "HiFi Playback", SSM4567_REG_POWER_CTRL, 2, 1),
 174         SND_SOC_DAPM_SWITCH("Amplifier Boost", SSM4567_REG_POWER_CTRL, 3, 1,
 175                 &ssm4567_amplifier_boost_control),
 176
 177         SND_SOC_DAPM_SIGGEN("Sense"),
 178
 179         SND_SOC_DAPM_PGA("Current Sense", SSM4567_REG_POWER_CTRL, 4, 1, NULL, 0),
 180         SND_SOC_DAPM_PGA("Voltage Sense", SSM4567_REG_POWER_CTRL, 5, 1, NULL, 0),
 181         SND_SOC_DAPM_PGA("VBAT Sense", SSM4567_REG_POWER_CTRL, 6, 1, NULL, 0),
 182
 183         SND_SOC_DAPM_OUTPUT("OUT"),
 184 };
 185
 186 static const struct snd_soc_dapm_route ssm4567_routes[] = {
 187         { "OUT", NULL, "Amplifier Boost" },
 188         { "Amplifier Boost", "Switch", "DAC" },
 189         { "OUT", NULL, "DAC" },
 190
 191         { "Current Sense", NULL, "Sense" },
 192         { "Voltage Sense", NULL, "Sense" },
 193         { "VBAT Sense", NULL, "Sense" },
 194         { "Capture Sense", NULL, "Current Sense" },
 195         { "Capture Sense", NULL, "Voltage Sense" },
 196         { "Capture Sense", NULL, "VBAT Sense" },
 197 };
 198
 199 static int ssm4567_hw_params(struct snd_pcm_substream *substream,
 200         struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
 201 {
 202         struct snd_soc_codec *codec = dai->codec;
 203         struct ssm4567 *ssm4567 = snd_soc_codec_get_drvdata(codec);
 204         unsigned int rate = params_rate(params);
 205         unsigned int dacfs;
 206
 207         if (rate >= 8000 && rate <= 12000)
 208                 dacfs = SSM4567_DAC_FS_8000_12000;
 209         else if (rate >= 16000 && rate <= 24000)
 210                 dacfs = SSM4567_DAC_FS_16000_24000;
 211         else if (rate >= 32000 && rate <= 48000)
 212                 dacfs = SSM4567_DAC_FS_32000_48000;
 213         else if (rate >= 64000 && rate <= 96000)
 214                 dacfs = SSM4567_DAC_FS_64000_96000;
 215         else if (rate >= 128000 && rate <= 192000)
 216                 dacfs = SSM4567_DAC_FS_128000_192000;
 217         else
 218                 return -EINVAL;
 219
 220         return regmap_update_bits(ssm4567->regmap, SSM4567_REG_DAC_CTRL,
 221                                 SSM4567_DAC_FS_MASK, dacfs);
 222 }
 223
 224 static int ssm4567_mute(struct snd_soc_dai *dai, int mute)
 225 {
 226         struct ssm4567 *ssm4567 = snd_soc_codec_get_drvdata(dai->codec);
 227         unsigned int val;
 228
 229         val = mute ? SSM4567_DAC_MUTE : 0;
 230         return regmap_update_bits(ssm4567->regmap, SSM4567_REG_DAC_CTRL,
 231                         SSM4567_DAC_MUTE, val);
 232 }
 233
 234 static int ssm4567_set_tdm_slot(struct snd_soc_dai *dai, unsigned int tx_mask,
 235         unsigned int rx_mask, int slots, int width)
 236 {
 237         struct ssm4567 *ssm4567 = snd_soc_dai_get_drvdata(dai);
 238         unsigned int blcks;
 239         int slot;
 240         int ret;
 241
 242         if (tx_mask == 0)
 243                 return -EINVAL;
 244
 245         if (rx_mask && rx_mask != tx_mask)
 246                 return -EINVAL;
 247
 248         slot = __ffs(tx_mask);
 249         if (tx_mask != BIT(slot))
 250                 return -EINVAL;
 251
 252         switch (width) {
 253         case 32:
 254                 blcks = SSM4567_SAI_CTRL_1_TDM_BLCKS_32;
 255                 break;
 256         case 48:
 257                 blcks = SSM4567_SAI_CTRL_1_TDM_BLCKS_48;
 258                 break;
 259         case 64:
 260                 blcks = SSM4567_SAI_CTRL_1_TDM_BLCKS_64;
 261                 break;
 262         default:
 263                 return -EINVAL;
 264         }
 265
 266         ret = regmap_update_bits(ssm4567->regmap, SSM4567_REG_SAI_CTRL_2,
 267                 SSM4567_SAI_CTRL_2_AUTO_SLOT | SSM4567_SAI_CTRL_2_TDM_SLOT_MASK,
 268                 SSM4567_SAI_CTRL_2_TDM_SLOT(slot));
 269         if (ret)
 270                 return ret;
 271
 272         return regmap_update_bits(ssm4567->regmap, SSM4567_REG_SAI_CTRL_1,
 273                 SSM4567_SAI_CTRL_1_TDM_BLCKS_MASK, blcks);
 274 }
 275
 276 static int ssm4567_set_dai_fmt(struct snd_soc_dai *dai, unsigned int fmt)
 277 {
 278         struct ssm4567 *ssm4567 = snd_soc_dai_get_drvdata(dai);
 279         unsigned int ctrl1 = 0;
 280         bool invert_fclk;
 281
 282         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 283         case SND_SOC_DAIFMT_CBS_CFS:
 284                 break;
 285         default:
 286                 return -EINVAL;
 287         }
 288
 289         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 290         case SND_SOC_DAIFMT_NB_NF:
 291                 invert_fclk = false;
 292                 break;
 293         case SND_SOC_DAIFMT_IB_NF:
 294                 ctrl1 |= SSM4567_SAI_CTRL_1_BCLK;
 295                 invert_fclk = false;
 296                 break;
 297         case SND_SOC_DAIFMT_NB_IF:
 298                 ctrl1 |= SSM4567_SAI_CTRL_1_FSYNC;
 299                 invert_fclk = true;
 300                 break;
 301         case SND_SOC_DAIFMT_IB_IF:
 302                 ctrl1 |= SSM4567_SAI_CTRL_1_BCLK;
 303                 invert_fclk = true;
 304                 break;
 305         default:
 306                 return -EINVAL;
 307         }
 308
 309         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 310         case SND_SOC_DAIFMT_I2S:
 311                 break;
 312         case SND_SOC_DAIFMT_LEFT_J:
 313                 ctrl1 |= SSM4567_SAI_CTRL_1_LJ;
 314                 invert_fclk = !invert_fclk;
 315                 break;
 316         case SND_SOC_DAIFMT_DSP_A:
 317                 ctrl1 |= SSM4567_SAI_CTRL_1_TDM;
 318                 break;
 319         case SND_SOC_DAIFMT_DSP_B:
 320                 ctrl1 |= SSM4567_SAI_CTRL_1_TDM | SSM4567_SAI_CTRL_1_LJ;
 321                 break;
 322         case SND_SOC_DAIFMT_PDM:
 323                 ctrl1 |= SSM4567_SAI_CTRL_1_PDM;
 324                 break;
 325         default:
 326                 return -EINVAL;
 327         }
 328
 329         if (invert_fclk)
 330                 ctrl1 |= SSM4567_SAI_CTRL_1_FSYNC;
 331
 332         return regmap_update_bits(ssm4567->regmap, SSM4567_REG_SAI_CTRL_1,
 333                         SSM4567_SAI_CTRL_1_BCLK |
 334                         SSM4567_SAI_CTRL_1_FSYNC |
 335                         SSM4567_SAI_CTRL_1_LJ |
 336                         SSM4567_SAI_CTRL_1_TDM |
 337                         SSM4567_SAI_CTRL_1_PDM,
 338                         ctrl1);
 339 }
 340
 341 static int ssm4567_set_power(struct ssm4567 *ssm4567, bool enable)
 342 {
 343         int ret = 0;
 344
 345         if (!enable) {
 346                 ret = regmap_update_bits(ssm4567->regmap,
 347                         SSM4567_REG_POWER_CTRL,
 348                         SSM4567_POWER_SPWDN, SSM4567_POWER_SPWDN);
 349                 regcache_mark_dirty(ssm4567->regmap);
 350         }
 351
 352         regcache_cache_only(ssm4567->regmap, !enable);
 353
 354         if (enable) {
 355                 ret = regmap_write(ssm4567->regmap, SSM4567_REG_SOFT_RESET,
 356                         0x00);
 357                 if (ret)
 358                         return ret;
 359
 360                 ret = regmap_update_bits(ssm4567->regmap,
 361                         SSM4567_REG_POWER_CTRL,
 362                         SSM4567_POWER_SPWDN, 0x00);
 363                 regcache_sync(ssm4567->regmap);
 364         }
 365
 366         return ret;
 367 }
 368
 369 static int ssm4567_set_bias_level(struct snd_soc_codec *codec,
 370         enum snd_soc_bias_level level)
 371 {
 372         struct ssm4567 *ssm4567 = snd_soc_codec_get_drvdata(codec);
 373         int ret = 0;
 374
 375         switch (level) {
 376         case SND_SOC_BIAS_ON:
 377                 break;
 378         case SND_SOC_BIAS_PREPARE:
 379                 break;
 380         case SND_SOC_BIAS_STANDBY:
 381                 if (snd_soc_codec_get_bias_level(codec) == SND_SOC_BIAS_OFF)
 382                         ret = ssm4567_set_power(ssm4567, true);
 383                 break;
 384         case SND_SOC_BIAS_OFF:
 385                 ret = ssm4567_set_power(ssm4567, false);
 386                 break;
 387         }
 388
 389         return ret;
 390 }
 391
 392 static const struct snd_soc_dai_ops ssm4567_dai_ops = {
 393         .hw_params      = ssm4567_hw_params,
 394         .digital_mute   = ssm4567_mute,
 395         .set_fmt        = ssm4567_set_dai_fmt,
 396         .set_tdm_slot   = ssm4567_set_tdm_slot,
 397 };
 398
 399 static struct snd_soc_dai_driver ssm4567_dai = {
 400         .name = "ssm4567-hifi",
 401         .playback = {
 402                 .stream_name = "Playback",
 403                 .channels_min = 1,
 404                 .channels_max = 1,
 405                 .rates = SNDRV_PCM_RATE_8000_192000,
 406                 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE |
 407                         SNDRV_PCM_FMTBIT_S32,
 408         },
 409         .capture = {
 410                 .stream_name = "Capture Sense",
 411                 .channels_min = 1,
 412                 .channels_max = 1,
 413                 .rates = SNDRV_PCM_RATE_8000_192000,
 414                 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE |
 415                         SNDRV_PCM_FMTBIT_S32,
 416         },
 417         .ops = &ssm4567_dai_ops,
 418 };
 419
 420 static const struct snd_soc_codec_driver ssm4567_codec_driver = {
 421         .set_bias_level = ssm4567_set_bias_level,
 422         .idle_bias_off = true,
 423
 424         .component_driver = {
 425                 .controls               = ssm4567_snd_controls,
 426                 .num_controls           = ARRAY_SIZE(ssm4567_snd_controls),
 427                 .dapm_widgets           = ssm4567_dapm_widgets,
 428                 .num_dapm_widgets       = ARRAY_SIZE(ssm4567_dapm_widgets),
 429                 .dapm_routes            = ssm4567_routes,
 430                 .num_dapm_routes        = ARRAY_SIZE(ssm4567_routes),
 431         },
 432 };
 433
 434 static const struct regmap_config ssm4567_regmap_config = {
 435         .val_bits = 8,
 436         .reg_bits = 8,
 437
 438         .max_register = SSM4567_REG_SOFT_RESET,
 439         .readable_reg = ssm4567_readable_reg,
 440         .writeable_reg = ssm4567_writeable_reg,
 441         .volatile_reg = ssm4567_volatile_reg,
 442
 443         .cache_type = REGCACHE_RBTREE,
 444         .reg_defaults = ssm4567_reg_defaults,
 445         .num_reg_defaults = ARRAY_SIZE(ssm4567_reg_defaults),
 446 };
 447
 448 static int ssm4567_i2c_probe(struct i2c_client *i2c,
 449         const struct i2c_device_id *id)
 450 {
 451         struct ssm4567 *ssm4567;
 452         int ret;
 453
 454         ssm4567 = devm_kzalloc(&i2c->dev, sizeof(*ssm4567), GFP_KERNEL);
 455         if (ssm4567 == NULL)
 456                 return -ENOMEM;
 457
 458         i2c_set_clientdata(i2c, ssm4567);
 459
 460         ssm4567->regmap = devm_regmap_init_i2c(i2c, &ssm4567_regmap_config);
 461         if (IS_ERR(ssm4567->regmap))
 462                 return PTR_ERR(ssm4567->regmap);
 463
 464         ret = regmap_write(ssm4567->regmap, SSM4567_REG_SOFT_RESET, 0x00);
 465         if (ret)
 466                 return ret;
 467
 468         ret = ssm4567_set_power(ssm4567, false);
 469         if (ret)
 470                 return ret;
 471
 472         return snd_soc_register_codec(&i2c->dev, &ssm4567_codec_driver,
 473                         &ssm4567_dai, 1);
 474 }
 475
 476 static int ssm4567_i2c_remove(struct i2c_client *client)
 477 {
 478         snd_soc_unregister_codec(&client->dev);
 479         return 0;
 480 }
 481
 482 static const struct i2c_device_id ssm4567_i2c_ids[] = {
 483         { "ssm4567", 0 },
 484         { }
 485 };
 486 MODULE_DEVICE_TABLE(i2c, ssm4567_i2c_ids);
 487
 488 #ifdef CONFIG_OF
 489 static const struct of_device_id ssm4567_of_match[] = {
 490         { .compatible = "adi,ssm4567", },
 491         { }
 492 };
 493 MODULE_DEVICE_TABLE(of, ssm4567_of_match);
 494 #endif
 495
 496 #ifdef CONFIG_ACPI
 497
 498 static const struct acpi_device_id ssm4567_acpi_match[] = {
 499         { "INT343B", 0 },
 500         {},
 501 };
 502 MODULE_DEVICE_TABLE(acpi, ssm4567_acpi_match);
 503
 504 #endif
 505
 506 static struct i2c_driver ssm4567_driver = {
 507         .driver = {
 508                 .name = "ssm4567",
 509                 .of_match_table = of_match_ptr(ssm4567_of_match),
 510                 .acpi_match_table = ACPI_PTR(ssm4567_acpi_match),
 511         },
 512         .probe = ssm4567_i2c_probe,
 513         .remove = ssm4567_i2c_remove,
 514         .id_table = ssm4567_i2c_ids,
 515 };
 516 module_i2c_driver(ssm4567_driver);
 517
 518 MODULE_DESCRIPTION("ASoC SSM4567 driver");
 519 MODULE_AUTHOR("Anatol Pomozov <anatol@chromium.org>");
 520 MODULE_LICENSE("GPL");