sound/soc/codecs/cs35l56-sdw.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 //
   3 // CS35L56 ALSA SoC audio driver SoundWire binding
   4 //
   5 // Copyright (C) 2023 Cirrus Logic, Inc. and
   6 //                    Cirrus Logic International Semiconductor Ltd.
   7
   8 #include <linux/delay.h>
   9 #include <linux/device.h>
  10 #include <linux/err.h>
  11 #include <linux/module.h>
  12 #include <linux/pm_runtime.h>
  13 #include <linux/regmap.h>
  14 #include <linux/soundwire/sdw.h>
  15 #include <linux/soundwire/sdw_registers.h>
  16 #include <linux/soundwire/sdw_type.h>
  17 #include <linux/swab.h>
  18 #include <linux/types.h>
  19 #include <linux/workqueue.h>
  20
  21 #include "cs35l56.h"
  22
  23 /* Register addresses are offset when sent over SoundWire */
  24 #define CS35L56_SDW_ADDR_OFFSET         0x8000
  25
  26 static int cs35l56_sdw_read_one(struct sdw_slave *peripheral, unsigned int reg, void *buf)
  27 {
  28         int ret;
  29
  30         ret = sdw_nread_no_pm(peripheral, reg, 4, (u8 *)buf);
  31         if (ret != 0) {
  32                 dev_err(&peripheral->dev, "Read failed @%#x:%d\n", reg, ret);
  33                 return ret;
  34         }
  35
  36         swab32s((u32 *)buf);
  37
  38         return 0;
  39 }
  40
  41 static int cs35l56_sdw_read(void *context, const void *reg_buf,
  42                             const size_t reg_size, void *val_buf,
  43                             size_t val_size)
  44 {
  45         struct sdw_slave *peripheral = context;
  46         u8 *buf8 = val_buf;
  47         unsigned int reg, bytes;
  48         int ret;
  49
  50         reg = le32_to_cpu(*(const __le32 *)reg_buf);
  51         reg += CS35L56_SDW_ADDR_OFFSET;
  52
  53         if (val_size == 4)
  54                 return cs35l56_sdw_read_one(peripheral, reg, val_buf);
  55
  56         while (val_size) {
  57                 bytes = SDW_REG_NO_PAGE - (reg & SDW_REGADDR); /* to end of page */
  58                 if (bytes > val_size)
  59                         bytes = val_size;
  60
  61                 ret = sdw_nread_no_pm(peripheral, reg, bytes, buf8);
  62                 if (ret != 0) {
  63                         dev_err(&peripheral->dev, "Read failed @%#x..%#x:%d\n",
  64                                 reg, reg + bytes - 1, ret);
  65                         return ret;
  66                 }
  67
  68                 swab32_array((u32 *)buf8, bytes / 4);
  69                 val_size -= bytes;
  70                 reg += bytes;
  71                 buf8 += bytes;
  72         }
  73
  74         return 0;
  75 }
  76
  77 static inline void cs35l56_swab_copy(void *dest, const void *src, size_t nbytes)
  78 {
  79         u32 *dest32 = dest;
  80         const u32 *src32 = src;
  81
  82         for (; nbytes > 0; nbytes -= 4)
  83                 *dest32++ = swab32(*src32++);
  84 }
  85
  86 static int cs35l56_sdw_write_one(struct sdw_slave *peripheral, unsigned int reg, const void *buf)
  87 {
  88         u32 val_le = swab32(*(u32 *)buf);
  89         int ret;
  90
  91         ret = sdw_nwrite_no_pm(peripheral, reg, 4, (u8 *)&val_le);
  92         if (ret != 0) {
  93                 dev_err(&peripheral->dev, "Write failed @%#x:%d\n", reg, ret);
  94                 return ret;
  95         }
  96
  97         return 0;
  98 }
  99
 100 static int cs35l56_sdw_gather_write(void *context,
 101                                     const void *reg_buf, size_t reg_size,
 102                                     const void *val_buf, size_t val_size)
 103 {
 104         struct sdw_slave *peripheral = context;
 105         const u8 *src_be = val_buf;
 106         u32 val_le_buf[64];     /* Define u32 so it is 32-bit aligned */
 107         unsigned int reg, bytes;
 108         int ret;
 109
 110         reg = le32_to_cpu(*(const __le32 *)reg_buf);
 111         reg += CS35L56_SDW_ADDR_OFFSET;
 112
 113         if (val_size == 4)
 114                 return cs35l56_sdw_write_one(peripheral, reg, src_be);
 115
 116         while (val_size) {
 117                 bytes = SDW_REG_NO_PAGE - (reg & SDW_REGADDR); /* to end of page */
 118                 if (bytes > val_size)
 119                         bytes = val_size;
 120                 if (bytes > sizeof(val_le_buf))
 121                         bytes = sizeof(val_le_buf);
 122
 123                 cs35l56_swab_copy(val_le_buf, src_be, bytes);
 124
 125                 ret = sdw_nwrite_no_pm(peripheral, reg, bytes, (u8 *)val_le_buf);
 126                 if (ret != 0) {
 127                         dev_err(&peripheral->dev, "Write failed @%#x..%#x:%d\n",
 128                                 reg, reg + bytes - 1, ret);
 129                         return ret;
 130                 }
 131
 132                 val_size -= bytes;
 133                 reg += bytes;
 134                 src_be += bytes;
 135         }
 136
 137         return 0;
 138 }
 139
 140 static int cs35l56_sdw_write(void *context, const void *val_buf, size_t val_size)
 141 {
 142         const u8 *src_buf = val_buf;
 143
 144         /* First word of val_buf contains the destination address */
 145         return cs35l56_sdw_gather_write(context, &src_buf[0], 4, &src_buf[4], val_size - 4);
 146 }
 147
 148 /*
 149  * Registers are big-endian on I2C and SPI but little-endian on SoundWire.
 150  * Exported firmware controls are big-endian on I2C/SPI but little-endian on
 151  * SoundWire. Firmware files are always big-endian and are opaque blobs.
 152  * Present a big-endian regmap and hide the endianness swap, so that the ALSA
 153  * byte controls always have the same byte order, and firmware file blobs
 154  * can be written verbatim.
 155  */
 156 static const struct regmap_bus cs35l56_regmap_bus_sdw = {
 157         .read = cs35l56_sdw_read,
 158         .write = cs35l56_sdw_write,
 159         .gather_write = cs35l56_sdw_gather_write,
 160         .reg_format_endian_default = REGMAP_ENDIAN_LITTLE,
 161         .val_format_endian_default = REGMAP_ENDIAN_BIG,
 162 };
 163
 164 static int cs35l56_sdw_set_cal_index(struct cs35l56_private *cs35l56)
 165 {
 166         int ret;
 167
 168         /* SoundWire UniqueId is used to index the calibration array */
 169         ret = sdw_read_no_pm(cs35l56->sdw_peripheral, SDW_SCP_DEVID_0);
 170         if (ret < 0)
 171                 return ret;
 172
 173         cs35l56->base.cal_index = ret & 0xf;
 174
 175         return 0;
 176 }
 177
 178 static void cs35l56_sdw_init(struct sdw_slave *peripheral)
 179 {
 180         struct cs35l56_private *cs35l56 = dev_get_drvdata(&peripheral->dev);
 181         int ret;
 182
 183         pm_runtime_get_noresume(cs35l56->base.dev);
 184
 185         if (cs35l56->base.cal_index < 0) {
 186                 ret = cs35l56_sdw_set_cal_index(cs35l56);
 187                 if (ret < 0)
 188                         goto out;
 189         }
 190
 191         regcache_cache_only(cs35l56->base.regmap, false);
 192
 193         ret = cs35l56_init(cs35l56);
 194         if (ret < 0) {
 195                 regcache_cache_only(cs35l56->base.regmap, true);
 196                 goto out;
 197         }
 198
 199         /*
 200          * cs35l56_init can return with !init_done if it triggered
 201          * a soft reset.
 202          */
 203         if (cs35l56->base.init_done) {
 204                 /* Enable SoundWire interrupts */
 205                 sdw_write_no_pm(peripheral, CS35L56_SDW_GEN_INT_MASK_1,
 206                                 CS35L56_SDW_INT_MASK_CODEC_IRQ);
 207         }
 208
 209 out:
 210         pm_runtime_mark_last_busy(cs35l56->base.dev);
 211         pm_runtime_put_autosuspend(cs35l56->base.dev);
 212 }
 213
 214 static int cs35l56_sdw_interrupt(struct sdw_slave *peripheral,
 215                                  struct sdw_slave_intr_status *status)
 216 {
 217         struct cs35l56_private *cs35l56 = dev_get_drvdata(&peripheral->dev);
 218
 219         /* SoundWire core holds our pm_runtime when calling this function. */
 220
 221         dev_dbg(cs35l56->base.dev, "int control_port=%#x\n", status->control_port);
 222
 223         if ((status->control_port & SDW_SCP_INT1_IMPL_DEF) == 0)
 224                 return 0;
 225
 226         /*
 227          * Prevent bus manager suspending and possibly issuing a
 228          * bus-reset before the queued work has run.
 229          */
 230         pm_runtime_get_noresume(cs35l56->base.dev);
 231
 232         /*
 233          * Mask and clear until it has been handled. The read of GEN_INT_STAT_1
 234          * is required as per the SoundWire spec for interrupt status bits
 235          * to clear. GEN_INT_MASK_1 masks the _inputs_ to GEN_INT_STAT1.
 236          * None of the interrupts are time-critical so use the
 237          * power-efficient queue.
 238          */
 239         sdw_write_no_pm(peripheral, CS35L56_SDW_GEN_INT_MASK_1, 0);
 240         sdw_read_no_pm(peripheral, CS35L56_SDW_GEN_INT_STAT_1);
 241         sdw_write_no_pm(peripheral, CS35L56_SDW_GEN_INT_STAT_1, 0xFF);
 242         queue_work(system_power_efficient_wq, &cs35l56->sdw_irq_work);
 243
 244         return 0;
 245 }
 246
 247 static void cs35l56_sdw_irq_work(struct work_struct *work)
 248 {
 249         struct cs35l56_private *cs35l56 = container_of(work,
 250                                                        struct cs35l56_private,
 251                                                        sdw_irq_work);
 252
 253         cs35l56_irq(-1, &cs35l56->base);
 254
 255         /* unmask interrupts */
 256         if (!cs35l56->sdw_irq_no_unmask)
 257                 sdw_write_no_pm(cs35l56->sdw_peripheral, CS35L56_SDW_GEN_INT_MASK_1,
 258                                 CS35L56_SDW_INT_MASK_CODEC_IRQ);
 259
 260         pm_runtime_put_autosuspend(cs35l56->base.dev);
 261 }
 262
 263 static int cs35l56_sdw_read_prop(struct sdw_slave *peripheral)
 264 {
 265         struct cs35l56_private *cs35l56 = dev_get_drvdata(&peripheral->dev);
 266         struct sdw_slave_prop *prop = &peripheral->prop;
 267         struct sdw_dpn_prop *ports;
 268
 269         ports = devm_kcalloc(cs35l56->base.dev, 2, sizeof(*ports), GFP_KERNEL);
 270         if (!ports)
 271                 return -ENOMEM;
 272
 273         prop->source_ports = BIT(CS35L56_SDW1_CAPTURE_PORT);
 274         prop->sink_ports = BIT(CS35L56_SDW1_PLAYBACK_PORT);
 275         prop->paging_support = true;
 276         prop->clk_stop_mode1 = false;
 277         prop->quirks = SDW_SLAVE_QUIRKS_INVALID_INITIAL_PARITY;
 278         prop->scp_int1_mask = SDW_SCP_INT1_BUS_CLASH | SDW_SCP_INT1_PARITY | SDW_SCP_INT1_IMPL_DEF;
 279
 280         /* DP1 - playback */
 281         ports[0].num = CS35L56_SDW1_PLAYBACK_PORT;
 282         ports[0].type = SDW_DPN_FULL;
 283         ports[0].ch_prep_timeout = 10;
 284         prop->sink_dpn_prop = &ports[0];
 285
 286         /* DP3 - capture */
 287         ports[1].num = CS35L56_SDW1_CAPTURE_PORT;
 288         ports[1].type = SDW_DPN_FULL;
 289         ports[1].ch_prep_timeout = 10;
 290         prop->src_dpn_prop = &ports[1];
 291
 292         return 0;
 293 }
 294
 295 static int cs35l56_sdw_update_status(struct sdw_slave *peripheral,
 296                                      enum sdw_slave_status status)
 297 {
 298         struct cs35l56_private *cs35l56 = dev_get_drvdata(&peripheral->dev);
 299
 300         switch (status) {
 301         case SDW_SLAVE_ATTACHED:
 302                 dev_dbg(cs35l56->base.dev, "%s: ATTACHED\n", __func__);
 303                 if (cs35l56->sdw_attached)
 304                         break;
 305
 306                 if (!cs35l56->base.init_done || cs35l56->soft_resetting)
 307                         cs35l56_sdw_init(peripheral);
 308
 309                 cs35l56->sdw_attached = true;
 310                 break;
 311         case SDW_SLAVE_UNATTACHED:
 312                 dev_dbg(cs35l56->base.dev, "%s: UNATTACHED\n", __func__);
 313                 cs35l56->sdw_attached = false;
 314                 break;
 315         default:
 316                 break;
 317         }
 318
 319         return 0;
 320 }
 321
 322 static int cs35l56_a1_kick_divider(struct cs35l56_private *cs35l56,
 323                                    struct sdw_slave *peripheral)
 324 {
 325         unsigned int curr_scale_reg, next_scale_reg;
 326         int curr_scale, next_scale, ret;
 327
 328         if (!cs35l56->base.init_done)
 329                 return 0;
 330
 331         if (peripheral->bus->params.curr_bank) {
 332                 curr_scale_reg = SDW_SCP_BUSCLOCK_SCALE_B1;
 333                 next_scale_reg = SDW_SCP_BUSCLOCK_SCALE_B0;
 334         } else {
 335                 curr_scale_reg = SDW_SCP_BUSCLOCK_SCALE_B0;
 336                 next_scale_reg = SDW_SCP_BUSCLOCK_SCALE_B1;
 337         }
 338
 339         /*
 340          * Current clock scale value must be different to new value.
 341          * Modify current to guarantee this. If next still has the dummy
 342          * value we wrote when it was current, the core code has not set
 343          * a new scale so restore its original good value
 344          */
 345         curr_scale = sdw_read_no_pm(peripheral, curr_scale_reg);
 346         if (curr_scale < 0) {
 347                 dev_err(cs35l56->base.dev, "Failed to read current clock scale: %d\n", curr_scale);
 348                 return curr_scale;
 349         }
 350
 351         next_scale = sdw_read_no_pm(peripheral, next_scale_reg);
 352         if (next_scale < 0) {
 353                 dev_err(cs35l56->base.dev, "Failed to read next clock scale: %d\n", next_scale);
 354                 return next_scale;
 355         }
 356
 357         if (next_scale == CS35L56_SDW_INVALID_BUS_SCALE) {
 358                 next_scale = cs35l56->old_sdw_clock_scale;
 359                 ret = sdw_write_no_pm(peripheral, next_scale_reg, next_scale);
 360                 if (ret < 0) {
 361                         dev_err(cs35l56->base.dev, "Failed to modify current clock scale: %d\n",
 362                                 ret);
 363                         return ret;
 364                 }
 365         }
 366
 367         cs35l56->old_sdw_clock_scale = curr_scale;
 368         ret = sdw_write_no_pm(peripheral, curr_scale_reg, CS35L56_SDW_INVALID_BUS_SCALE);
 369         if (ret < 0) {
 370                 dev_err(cs35l56->base.dev, "Failed to modify current clock scale: %d\n", ret);
 371                 return ret;
 372         }
 373
 374         dev_dbg(cs35l56->base.dev, "Next bus scale: %#x\n", next_scale);
 375
 376         return 0;
 377 }
 378
 379 static int cs35l56_sdw_bus_config(struct sdw_slave *peripheral,
 380                                   struct sdw_bus_params *params)
 381 {
 382         struct cs35l56_private *cs35l56 = dev_get_drvdata(&peripheral->dev);
 383         int sclk;
 384
 385         sclk = params->curr_dr_freq / 2;
 386         dev_dbg(cs35l56->base.dev, "%s: sclk=%u c=%u r=%u\n",
 387                 __func__, sclk, params->col, params->row);
 388
 389         if ((cs35l56->base.type == 0x56) && (cs35l56->base.rev < 0xb0))
 390                 return cs35l56_a1_kick_divider(cs35l56, peripheral);
 391
 392         return 0;
 393 }
 394
 395 static int __maybe_unused cs35l56_sdw_clk_stop(struct sdw_slave *peripheral,
 396                                                enum sdw_clk_stop_mode mode,
 397                                                enum sdw_clk_stop_type type)
 398 {
 399         struct cs35l56_private *cs35l56 = dev_get_drvdata(&peripheral->dev);
 400
 401         dev_dbg(cs35l56->base.dev, "%s: mode:%d type:%d\n", __func__, mode, type);
 402
 403         return 0;
 404 }
 405
 406 static const struct sdw_slave_ops cs35l56_sdw_ops = {
 407         .read_prop = cs35l56_sdw_read_prop,
 408         .interrupt_callback = cs35l56_sdw_interrupt,
 409         .update_status = cs35l56_sdw_update_status,
 410         .bus_config = cs35l56_sdw_bus_config,
 411 #ifdef DEBUG
 412         .clk_stop = cs35l56_sdw_clk_stop,
 413 #endif
 414 };
 415
 416 static int __maybe_unused cs35l56_sdw_handle_unattach(struct cs35l56_private *cs35l56)
 417 {
 418         struct sdw_slave *peripheral = cs35l56->sdw_peripheral;
 419
 420         if (peripheral->unattach_request) {
 421                 /* Cannot access registers until bus is re-initialized. */
 422                 dev_dbg(cs35l56->base.dev, "Wait for initialization_complete\n");
 423                 if (!wait_for_completion_timeout(&peripheral->initialization_complete,
 424                                                  msecs_to_jiffies(5000))) {
 425                         dev_err(cs35l56->base.dev, "initialization_complete timed out\n");
 426                         return -ETIMEDOUT;
 427                 }
 428
 429                 peripheral->unattach_request = 0;
 430
 431                 /*
 432                  * Don't call regcache_mark_dirty(), we can't be sure that the
 433                  * Manager really did issue a Bus Reset.
 434                  */
 435         }
 436
 437         return 0;
 438 }
 439
 440 static int __maybe_unused cs35l56_sdw_runtime_suspend(struct device *dev)
 441 {
 442         struct cs35l56_private *cs35l56 = dev_get_drvdata(dev);
 443
 444         if (!cs35l56->base.init_done)
 445                 return 0;
 446
 447         return cs35l56_runtime_suspend_common(&cs35l56->base);
 448 }
 449
 450 static int __maybe_unused cs35l56_sdw_runtime_resume(struct device *dev)
 451 {
 452         struct cs35l56_private *cs35l56 = dev_get_drvdata(dev);
 453         int ret;
 454
 455         dev_dbg(dev, "Runtime resume\n");
 456
 457         if (!cs35l56->base.init_done)
 458                 return 0;
 459
 460         ret = cs35l56_sdw_handle_unattach(cs35l56);
 461         if (ret < 0)
 462                 return ret;
 463
 464         ret = cs35l56_runtime_resume_common(&cs35l56->base, true);
 465         if (ret)
 466                 return ret;
 467
 468         /* Re-enable SoundWire interrupts */
 469         sdw_write_no_pm(cs35l56->sdw_peripheral, CS35L56_SDW_GEN_INT_MASK_1,
 470                         CS35L56_SDW_INT_MASK_CODEC_IRQ);
 471
 472         return 0;
 473 }
 474
 475 static int __maybe_unused cs35l56_sdw_system_suspend(struct device *dev)
 476 {
 477         struct cs35l56_private *cs35l56 = dev_get_drvdata(dev);
 478
 479         if (!cs35l56->base.init_done)
 480                 return 0;
 481
 482         /*
 483          * Disable SoundWire interrupts.
 484          * Flush - don't cancel because that could leave an unbalanced pm_runtime_get.
 485          */
 486         cs35l56->sdw_irq_no_unmask = true;
 487         flush_work(&cs35l56->sdw_irq_work);
 488
 489         /* Mask interrupts and flush in case sdw_irq_work was queued again */
 490         sdw_write_no_pm(cs35l56->sdw_peripheral, CS35L56_SDW_GEN_INT_MASK_1, 0);
 491         sdw_read_no_pm(cs35l56->sdw_peripheral, CS35L56_SDW_GEN_INT_STAT_1);
 492         sdw_write_no_pm(cs35l56->sdw_peripheral, CS35L56_SDW_GEN_INT_STAT_1, 0xFF);
 493         flush_work(&cs35l56->sdw_irq_work);
 494
 495         return cs35l56_system_suspend(dev);
 496 }
 497
 498 static int __maybe_unused cs35l56_sdw_system_resume(struct device *dev)
 499 {
 500         struct cs35l56_private *cs35l56 = dev_get_drvdata(dev);
 501
 502         cs35l56->sdw_irq_no_unmask = false;
 503         /* runtime_resume re-enables the interrupt */
 504
 505         return cs35l56_system_resume(dev);
 506 }
 507
 508 static int cs35l56_sdw_probe(struct sdw_slave *peripheral, const struct sdw_device_id *id)
 509 {
 510         struct device *dev = &peripheral->dev;
 511         struct cs35l56_private *cs35l56;
 512         int ret;
 513
 514         cs35l56 = devm_kzalloc(dev, sizeof(*cs35l56), GFP_KERNEL);
 515         if (!cs35l56)
 516                 return -ENOMEM;
 517
 518         cs35l56->base.dev = dev;
 519         cs35l56->sdw_peripheral = peripheral;
 520         INIT_WORK(&cs35l56->sdw_irq_work, cs35l56_sdw_irq_work);
 521
 522         dev_set_drvdata(dev, cs35l56);
 523
 524         cs35l56->base.regmap = devm_regmap_init(dev, &cs35l56_regmap_bus_sdw,
 525                                            peripheral, &cs35l56_regmap_sdw);
 526         if (IS_ERR(cs35l56->base.regmap)) {
 527                 ret = PTR_ERR(cs35l56->base.regmap);
 528                 return dev_err_probe(dev, ret, "Failed to allocate register map\n");
 529         }
 530
 531         /* Start in cache-only until device is enumerated */
 532         regcache_cache_only(cs35l56->base.regmap, true);
 533
 534         ret = cs35l56_common_probe(cs35l56);
 535         if (ret != 0)
 536                 return ret;
 537
 538         return 0;
 539 }
 540
 541 static int cs35l56_sdw_remove(struct sdw_slave *peripheral)
 542 {
 543         struct cs35l56_private *cs35l56 = dev_get_drvdata(&peripheral->dev);
 544
 545         /* Disable SoundWire interrupts */
 546         cs35l56->sdw_irq_no_unmask = true;
 547         cancel_work_sync(&cs35l56->sdw_irq_work);
 548         sdw_write_no_pm(peripheral, CS35L56_SDW_GEN_INT_MASK_1, 0);
 549         sdw_read_no_pm(peripheral, CS35L56_SDW_GEN_INT_STAT_1);
 550         sdw_write_no_pm(peripheral, CS35L56_SDW_GEN_INT_STAT_1, 0xFF);
 551
 552         cs35l56_remove(cs35l56);
 553
 554         return 0;
 555 }
 556
 557 static const struct dev_pm_ops cs35l56_sdw_pm = {
 558         SET_RUNTIME_PM_OPS(cs35l56_sdw_runtime_suspend, cs35l56_sdw_runtime_resume, NULL)
 559         SYSTEM_SLEEP_PM_OPS(cs35l56_sdw_system_suspend, cs35l56_sdw_system_resume)
 560         LATE_SYSTEM_SLEEP_PM_OPS(cs35l56_system_suspend_late, cs35l56_system_resume_early)
 561         /* NOIRQ stage not needed, SoundWire doesn't use a hard IRQ */
 562 };
 563
 564 static const struct sdw_device_id cs35l56_sdw_id[] = {
 565         SDW_SLAVE_ENTRY(0x01FA, 0x3556, 0),
 566         SDW_SLAVE_ENTRY(0x01FA, 0x3557, 0),
 567         {},
 568 };
 569 MODULE_DEVICE_TABLE(sdw, cs35l56_sdw_id);
 570
 571 static struct sdw_driver cs35l56_sdw_driver = {
 572         .driver = {
 573                 .name = "cs35l56",
 574                 .pm = pm_ptr(&cs35l56_sdw_pm),
 575         },
 576         .probe = cs35l56_sdw_probe,
 577         .remove = cs35l56_sdw_remove,
 578         .ops = &cs35l56_sdw_ops,
 579         .id_table = cs35l56_sdw_id,
 580 };
 581
 582 module_sdw_driver(cs35l56_sdw_driver);
 583
 584 MODULE_DESCRIPTION("ASoC CS35L56 SoundWire driver");
 585 MODULE_IMPORT_NS(SND_SOC_CS35L56_CORE);
 586 MODULE_IMPORT_NS(SND_SOC_CS35L56_SHARED);
 587 MODULE_AUTHOR("Richard Fitzgerald <rf@opensource.cirrus.com>");
 588 MODULE_AUTHOR("Simon Trimmer <simont@opensource.cirrus.com>");
 589 MODULE_LICENSE("GPL");