wm8994-core.c revision 4740f73fe5388ab5d22d552d2a0dacc62418a70c
1/* 2 * wm8994-core.c -- Device access for Wolfson WM8994 3 * 4 * Copyright 2009 Wolfson Microelectronics PLC. 5 * 6 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com> 7 * 8 * This program is free software; you can redistribute it and/or modify it 9 * under the terms of the GNU General Public License as published by the 10 * Free Software Foundation; either version 2 of the License, or (at your 11 * option) any later version. 12 * 13 */ 14 15#include <linux/kernel.h> 16#include <linux/module.h> 17#include <linux/slab.h> 18#include <linux/i2c.h> 19#include <linux/err.h> 20#include <linux/delay.h> 21#include <linux/mfd/core.h> 22#include <linux/pm_runtime.h> 23#include <linux/regmap.h> 24#include <linux/regulator/consumer.h> 25#include <linux/regulator/machine.h> 26 27#include <linux/mfd/wm8994/core.h> 28#include <linux/mfd/wm8994/pdata.h> 29#include <linux/mfd/wm8994/registers.h> 30 31#include "wm8994.h" 32 33/** 34 * wm8994_reg_read: Read a single WM8994 register. 35 * 36 * @wm8994: Device to read from. 37 * @reg: Register to read. 38 */ 39int wm8994_reg_read(struct wm8994 *wm8994, unsigned short reg) 40{ 41 unsigned int val; 42 int ret; 43 44 ret = regmap_read(wm8994->regmap, reg, &val); 45 46 if (ret < 0) 47 return ret; 48 else 49 return val; 50} 51EXPORT_SYMBOL_GPL(wm8994_reg_read); 52 53/** 54 * wm8994_bulk_read: Read multiple WM8994 registers 55 * 56 * @wm8994: Device to read from 57 * @reg: First register 58 * @count: Number of registers 59 * @buf: Buffer to fill. The data will be returned big endian. 60 */ 61int wm8994_bulk_read(struct wm8994 *wm8994, unsigned short reg, 62 int count, u16 *buf) 63{ 64 return regmap_bulk_read(wm8994->regmap, reg, buf, count); 65} 66 67/** 68 * wm8994_reg_write: Write a single WM8994 register. 69 * 70 * @wm8994: Device to write to. 71 * @reg: Register to write to. 72 * @val: Value to write. 73 */ 74int wm8994_reg_write(struct wm8994 *wm8994, unsigned short reg, 75 unsigned short val) 76{ 77 return regmap_write(wm8994->regmap, reg, val); 78} 79EXPORT_SYMBOL_GPL(wm8994_reg_write); 80 81/** 82 * wm8994_bulk_write: Write multiple WM8994 registers 83 * 84 * @wm8994: Device to write to 85 * @reg: First register 86 * @count: Number of registers 87 * @buf: Buffer to write from. Data must be big-endian formatted. 88 */ 89int wm8994_bulk_write(struct wm8994 *wm8994, unsigned short reg, 90 int count, const u16 *buf) 91{ 92 return regmap_raw_write(wm8994->regmap, reg, buf, count * sizeof(u16)); 93} 94EXPORT_SYMBOL_GPL(wm8994_bulk_write); 95 96/** 97 * wm8994_set_bits: Set the value of a bitfield in a WM8994 register 98 * 99 * @wm8994: Device to write to. 100 * @reg: Register to write to. 101 * @mask: Mask of bits to set. 102 * @val: Value to set (unshifted) 103 */ 104int wm8994_set_bits(struct wm8994 *wm8994, unsigned short reg, 105 unsigned short mask, unsigned short val) 106{ 107 return regmap_update_bits(wm8994->regmap, reg, mask, val); 108} 109EXPORT_SYMBOL_GPL(wm8994_set_bits); 110 111static struct mfd_cell wm8994_regulator_devs[] = { 112 { 113 .name = "wm8994-ldo", 114 .id = 1, 115 .pm_runtime_no_callbacks = true, 116 }, 117 { 118 .name = "wm8994-ldo", 119 .id = 2, 120 .pm_runtime_no_callbacks = true, 121 }, 122}; 123 124static struct resource wm8994_codec_resources[] = { 125 { 126 .start = WM8994_IRQ_TEMP_SHUT, 127 .end = WM8994_IRQ_TEMP_WARN, 128 .flags = IORESOURCE_IRQ, 129 }, 130}; 131 132static struct resource wm8994_gpio_resources[] = { 133 { 134 .start = WM8994_IRQ_GPIO(1), 135 .end = WM8994_IRQ_GPIO(11), 136 .flags = IORESOURCE_IRQ, 137 }, 138}; 139 140static struct mfd_cell wm8994_devs[] = { 141 { 142 .name = "wm8994-codec", 143 .num_resources = ARRAY_SIZE(wm8994_codec_resources), 144 .resources = wm8994_codec_resources, 145 }, 146 147 { 148 .name = "wm8994-gpio", 149 .num_resources = ARRAY_SIZE(wm8994_gpio_resources), 150 .resources = wm8994_gpio_resources, 151 .pm_runtime_no_callbacks = true, 152 }, 153}; 154 155/* 156 * Supplies for the main bulk of CODEC; the LDO supplies are ignored 157 * and should be handled via the standard regulator API supply 158 * management. 159 */ 160static const char *wm1811_main_supplies[] = { 161 "DBVDD1", 162 "DBVDD2", 163 "DBVDD3", 164 "DCVDD", 165 "AVDD1", 166 "AVDD2", 167 "CPVDD", 168 "SPKVDD1", 169 "SPKVDD2", 170}; 171 172static const char *wm8994_main_supplies[] = { 173 "DBVDD", 174 "DCVDD", 175 "AVDD1", 176 "AVDD2", 177 "CPVDD", 178 "SPKVDD1", 179 "SPKVDD2", 180}; 181 182static const char *wm8958_main_supplies[] = { 183 "DBVDD1", 184 "DBVDD2", 185 "DBVDD3", 186 "DCVDD", 187 "AVDD1", 188 "AVDD2", 189 "CPVDD", 190 "SPKVDD1", 191 "SPKVDD2", 192}; 193 194#ifdef CONFIG_PM 195static int wm8994_suspend(struct device *dev) 196{ 197 struct wm8994 *wm8994 = dev_get_drvdata(dev); 198 int ret; 199 200 /* Don't actually go through with the suspend if the CODEC is 201 * still active (eg, for audio passthrough from CP. */ 202 ret = wm8994_reg_read(wm8994, WM8994_POWER_MANAGEMENT_1); 203 if (ret < 0) { 204 dev_err(dev, "Failed to read power status: %d\n", ret); 205 } else if (ret & WM8994_VMID_SEL_MASK) { 206 dev_dbg(dev, "CODEC still active, ignoring suspend\n"); 207 return 0; 208 } 209 210 ret = wm8994_reg_read(wm8994, WM8994_POWER_MANAGEMENT_4); 211 if (ret < 0) { 212 dev_err(dev, "Failed to read power status: %d\n", ret); 213 } else if (ret & (WM8994_AIF2ADCL_ENA | WM8994_AIF2ADCR_ENA | 214 WM8994_AIF1ADC2L_ENA | WM8994_AIF1ADC2R_ENA | 215 WM8994_AIF1ADC1L_ENA | WM8994_AIF1ADC1R_ENA)) { 216 dev_dbg(dev, "CODEC still active, ignoring suspend\n"); 217 return 0; 218 } 219 220 ret = wm8994_reg_read(wm8994, WM8994_POWER_MANAGEMENT_5); 221 if (ret < 0) { 222 dev_err(dev, "Failed to read power status: %d\n", ret); 223 } else if (ret & (WM8994_AIF2DACL_ENA | WM8994_AIF2DACR_ENA | 224 WM8994_AIF1DAC2L_ENA | WM8994_AIF1DAC2R_ENA | 225 WM8994_AIF1DAC1L_ENA | WM8994_AIF1DAC1R_ENA)) { 226 dev_dbg(dev, "CODEC still active, ignoring suspend\n"); 227 return 0; 228 } 229 230 switch (wm8994->type) { 231 case WM8958: 232 case WM1811: 233 ret = wm8994_reg_read(wm8994, WM8958_MIC_DETECT_1); 234 if (ret < 0) { 235 dev_err(dev, "Failed to read power status: %d\n", ret); 236 } else if (ret & WM8958_MICD_ENA) { 237 dev_dbg(dev, "CODEC still active, ignoring suspend\n"); 238 return 0; 239 } 240 break; 241 default: 242 break; 243 } 244 245 switch (wm8994->type) { 246 case WM1811: 247 ret = wm8994_reg_read(wm8994, WM8994_ANTIPOP_2); 248 if (ret < 0) { 249 dev_err(dev, "Failed to read jackdet: %d\n", ret); 250 } else if (ret & WM1811_JACKDET_MODE_MASK) { 251 dev_dbg(dev, "CODEC still active, ignoring suspend\n"); 252 return 0; 253 } 254 break; 255 default: 256 break; 257 } 258 259 switch (wm8994->type) { 260 case WM1811: 261 ret = wm8994_reg_read(wm8994, WM8994_ANTIPOP_2); 262 if (ret < 0) { 263 dev_err(dev, "Failed to read jackdet: %d\n", ret); 264 } else if (ret & WM1811_JACKDET_MODE_MASK) { 265 dev_dbg(dev, "CODEC still active, ignoring suspend\n"); 266 return 0; 267 } 268 break; 269 default: 270 break; 271 } 272 273 /* Disable LDO pulldowns while the device is suspended if we 274 * don't know that something will be driving them. */ 275 if (!wm8994->ldo_ena_always_driven) 276 wm8994_set_bits(wm8994, WM8994_PULL_CONTROL_2, 277 WM8994_LDO1ENA_PD | WM8994_LDO2ENA_PD, 278 WM8994_LDO1ENA_PD | WM8994_LDO2ENA_PD); 279 280 /* Explicitly put the device into reset in case regulators 281 * don't get disabled in order to ensure consistent restart. 282 */ 283 wm8994_reg_write(wm8994, WM8994_SOFTWARE_RESET, 284 wm8994_reg_read(wm8994, WM8994_SOFTWARE_RESET)); 285 286 regcache_mark_dirty(wm8994->regmap); 287 288 /* Restore GPIO registers to prevent problems with mismatched 289 * pin configurations. 290 */ 291 ret = regcache_sync_region(wm8994->regmap, WM8994_GPIO_1, 292 WM8994_GPIO_11); 293 if (ret != 0) 294 dev_err(dev, "Failed to restore GPIO registers: %d\n", ret); 295 296 /* In case one of the GPIOs is used as a wake input. */ 297 ret = regcache_sync_region(wm8994->regmap, 298 WM8994_INTERRUPT_STATUS_1_MASK, 299 WM8994_INTERRUPT_STATUS_1_MASK); 300 if (ret != 0) 301 dev_err(dev, "Failed to restore interrupt mask: %d\n", ret); 302 303 regcache_cache_only(wm8994->regmap, true); 304 wm8994->suspended = true; 305 306 ret = regulator_bulk_disable(wm8994->num_supplies, 307 wm8994->supplies); 308 if (ret != 0) { 309 dev_err(dev, "Failed to disable supplies: %d\n", ret); 310 return ret; 311 } 312 313 return 0; 314} 315 316static int wm8994_resume(struct device *dev) 317{ 318 struct wm8994 *wm8994 = dev_get_drvdata(dev); 319 int ret; 320 321 /* We may have lied to the PM core about suspending */ 322 if (!wm8994->suspended) 323 return 0; 324 325 ret = regulator_bulk_enable(wm8994->num_supplies, 326 wm8994->supplies); 327 if (ret != 0) { 328 dev_err(dev, "Failed to enable supplies: %d\n", ret); 329 return ret; 330 } 331 332 regcache_cache_only(wm8994->regmap, false); 333 ret = regcache_sync(wm8994->regmap); 334 if (ret != 0) { 335 dev_err(dev, "Failed to restore register map: %d\n", ret); 336 goto err_enable; 337 } 338 339 /* Disable LDO pulldowns while the device is active */ 340 wm8994_set_bits(wm8994, WM8994_PULL_CONTROL_2, 341 WM8994_LDO1ENA_PD | WM8994_LDO2ENA_PD, 342 0); 343 344 wm8994->suspended = false; 345 346 return 0; 347 348err_enable: 349 regulator_bulk_disable(wm8994->num_supplies, wm8994->supplies); 350 351 return ret; 352} 353#endif 354 355#ifdef CONFIG_REGULATOR 356static int wm8994_ldo_in_use(struct wm8994_pdata *pdata, int ldo) 357{ 358 struct wm8994_ldo_pdata *ldo_pdata; 359 360 if (!pdata) 361 return 0; 362 363 ldo_pdata = &pdata->ldo[ldo]; 364 365 if (!ldo_pdata->init_data) 366 return 0; 367 368 return ldo_pdata->init_data->num_consumer_supplies != 0; 369} 370#else 371static int wm8994_ldo_in_use(struct wm8994_pdata *pdata, int ldo) 372{ 373 return 0; 374} 375#endif 376 377static const struct reg_default wm8994_revc_patch[] = { 378 { 0x102, 0x3 }, 379 { 0x56, 0x3 }, 380 { 0x817, 0x0 }, 381 { 0x102, 0x0 }, 382}; 383 384static const struct reg_default wm8958_reva_patch[] = { 385 { 0x102, 0x3 }, 386 { 0xcb, 0x81 }, 387 { 0x817, 0x0 }, 388 { 0x102, 0x0 }, 389}; 390 391static const struct reg_default wm1811_reva_patch[] = { 392 { 0x102, 0x3 }, 393 { 0x56, 0xc07 }, 394 { 0x5d, 0x7e }, 395 { 0x5e, 0x0 }, 396 { 0x102, 0x0 }, 397}; 398 399/* 400 * Instantiate the generic non-control parts of the device. 401 */ 402static int wm8994_device_init(struct wm8994 *wm8994, int irq) 403{ 404 struct wm8994_pdata *pdata = wm8994->dev->platform_data; 405 struct regmap_config *regmap_config; 406 const struct reg_default *regmap_patch = NULL; 407 const char *devname; 408 int ret, i, patch_regs; 409 int pulls = 0; 410 411 dev_set_drvdata(wm8994->dev, wm8994); 412 413 /* Add the on-chip regulators first for bootstrapping */ 414 ret = mfd_add_devices(wm8994->dev, -1, 415 wm8994_regulator_devs, 416 ARRAY_SIZE(wm8994_regulator_devs), 417 NULL, 0, NULL); 418 if (ret != 0) { 419 dev_err(wm8994->dev, "Failed to add children: %d\n", ret); 420 goto err; 421 } 422 423 switch (wm8994->type) { 424 case WM1811: 425 wm8994->num_supplies = ARRAY_SIZE(wm1811_main_supplies); 426 break; 427 case WM8994: 428 wm8994->num_supplies = ARRAY_SIZE(wm8994_main_supplies); 429 break; 430 case WM8958: 431 wm8994->num_supplies = ARRAY_SIZE(wm8958_main_supplies); 432 break; 433 default: 434 BUG(); 435 goto err; 436 } 437 438 wm8994->supplies = devm_kzalloc(wm8994->dev, 439 sizeof(struct regulator_bulk_data) * 440 wm8994->num_supplies, GFP_KERNEL); 441 if (!wm8994->supplies) { 442 ret = -ENOMEM; 443 goto err; 444 } 445 446 switch (wm8994->type) { 447 case WM1811: 448 for (i = 0; i < ARRAY_SIZE(wm1811_main_supplies); i++) 449 wm8994->supplies[i].supply = wm1811_main_supplies[i]; 450 break; 451 case WM8994: 452 for (i = 0; i < ARRAY_SIZE(wm8994_main_supplies); i++) 453 wm8994->supplies[i].supply = wm8994_main_supplies[i]; 454 break; 455 case WM8958: 456 for (i = 0; i < ARRAY_SIZE(wm8958_main_supplies); i++) 457 wm8994->supplies[i].supply = wm8958_main_supplies[i]; 458 break; 459 default: 460 BUG(); 461 goto err; 462 } 463 464 ret = regulator_bulk_get(wm8994->dev, wm8994->num_supplies, 465 wm8994->supplies); 466 if (ret != 0) { 467 dev_err(wm8994->dev, "Failed to get supplies: %d\n", ret); 468 goto err; 469 } 470 471 ret = regulator_bulk_enable(wm8994->num_supplies, 472 wm8994->supplies); 473 if (ret != 0) { 474 dev_err(wm8994->dev, "Failed to enable supplies: %d\n", ret); 475 goto err_get; 476 } 477 478 ret = wm8994_reg_read(wm8994, WM8994_SOFTWARE_RESET); 479 if (ret < 0) { 480 dev_err(wm8994->dev, "Failed to read ID register\n"); 481 goto err_enable; 482 } 483 switch (ret) { 484 case 0x1811: 485 devname = "WM1811"; 486 if (wm8994->type != WM1811) 487 dev_warn(wm8994->dev, "Device registered as type %d\n", 488 wm8994->type); 489 wm8994->type = WM1811; 490 break; 491 case 0x8994: 492 devname = "WM8994"; 493 if (wm8994->type != WM8994) 494 dev_warn(wm8994->dev, "Device registered as type %d\n", 495 wm8994->type); 496 wm8994->type = WM8994; 497 break; 498 case 0x8958: 499 devname = "WM8958"; 500 if (wm8994->type != WM8958) 501 dev_warn(wm8994->dev, "Device registered as type %d\n", 502 wm8994->type); 503 wm8994->type = WM8958; 504 break; 505 default: 506 dev_err(wm8994->dev, "Device is not a WM8994, ID is %x\n", 507 ret); 508 ret = -EINVAL; 509 goto err_enable; 510 } 511 512 ret = wm8994_reg_read(wm8994, WM8994_CHIP_REVISION); 513 if (ret < 0) { 514 dev_err(wm8994->dev, "Failed to read revision register: %d\n", 515 ret); 516 goto err_enable; 517 } 518 wm8994->revision = ret & WM8994_CHIP_REV_MASK; 519 wm8994->cust_id = (ret & WM8994_CUST_ID_MASK) >> WM8994_CUST_ID_SHIFT; 520 521 switch (wm8994->type) { 522 case WM8994: 523 switch (wm8994->revision) { 524 case 0: 525 case 1: 526 dev_warn(wm8994->dev, 527 "revision %c not fully supported\n", 528 'A' + wm8994->revision); 529 break; 530 case 2: 531 case 3: 532 regmap_patch = wm8994_revc_patch; 533 patch_regs = ARRAY_SIZE(wm8994_revc_patch); 534 break; 535 default: 536 break; 537 } 538 break; 539 540 case WM8958: 541 switch (wm8994->revision) { 542 case 0: 543 regmap_patch = wm8958_reva_patch; 544 patch_regs = ARRAY_SIZE(wm8958_reva_patch); 545 break; 546 default: 547 break; 548 } 549 break; 550 551 case WM1811: 552 /* Revision C did not change the relevant layer */ 553 if (wm8994->revision > 1) 554 wm8994->revision++; 555 switch (wm8994->revision) { 556 case 0: 557 case 1: 558 case 2: 559 case 3: 560 regmap_patch = wm1811_reva_patch; 561 patch_regs = ARRAY_SIZE(wm1811_reva_patch); 562 break; 563 default: 564 break; 565 } 566 break; 567 568 default: 569 break; 570 } 571 572 dev_info(wm8994->dev, "%s revision %c CUST_ID %02x\n", devname, 573 'A' + wm8994->revision, wm8994->cust_id); 574 575 switch (wm8994->type) { 576 case WM1811: 577 regmap_config = &wm1811_regmap_config; 578 break; 579 case WM8994: 580 regmap_config = &wm8994_regmap_config; 581 break; 582 case WM8958: 583 regmap_config = &wm8958_regmap_config; 584 break; 585 default: 586 dev_err(wm8994->dev, "Unknown device type %d\n", wm8994->type); 587 return -EINVAL; 588 } 589 590 ret = regmap_reinit_cache(wm8994->regmap, regmap_config); 591 if (ret != 0) { 592 dev_err(wm8994->dev, "Failed to reinit register cache: %d\n", 593 ret); 594 return ret; 595 } 596 597 if (regmap_patch) { 598 ret = regmap_register_patch(wm8994->regmap, regmap_patch, 599 patch_regs); 600 if (ret != 0) { 601 dev_err(wm8994->dev, "Failed to register patch: %d\n", 602 ret); 603 goto err; 604 } 605 } 606 607 if (pdata) { 608 wm8994->irq_base = pdata->irq_base; 609 wm8994->gpio_base = pdata->gpio_base; 610 611 /* GPIO configuration is only applied if it's non-zero */ 612 for (i = 0; i < ARRAY_SIZE(pdata->gpio_defaults); i++) { 613 if (pdata->gpio_defaults[i]) { 614 wm8994_set_bits(wm8994, WM8994_GPIO_1 + i, 615 0xffff, 616 pdata->gpio_defaults[i]); 617 } 618 } 619 620 wm8994->ldo_ena_always_driven = pdata->ldo_ena_always_driven; 621 622 if (pdata->spkmode_pu) 623 pulls |= WM8994_SPKMODE_PU; 624 } 625 626 /* Disable unneeded pulls */ 627 wm8994_set_bits(wm8994, WM8994_PULL_CONTROL_2, 628 WM8994_LDO1ENA_PD | WM8994_LDO2ENA_PD | 629 WM8994_SPKMODE_PU | WM8994_CSNADDR_PD, 630 pulls); 631 632 /* In some system designs where the regulators are not in use, 633 * we can achieve a small reduction in leakage currents by 634 * floating LDO outputs. This bit makes no difference if the 635 * LDOs are enabled, it only affects cases where the LDOs were 636 * in operation and are then disabled. 637 */ 638 for (i = 0; i < WM8994_NUM_LDO_REGS; i++) { 639 if (wm8994_ldo_in_use(pdata, i)) 640 wm8994_set_bits(wm8994, WM8994_LDO_1 + i, 641 WM8994_LDO1_DISCH, WM8994_LDO1_DISCH); 642 else 643 wm8994_set_bits(wm8994, WM8994_LDO_1 + i, 644 WM8994_LDO1_DISCH, 0); 645 } 646 647 wm8994_irq_init(wm8994); 648 649 ret = mfd_add_devices(wm8994->dev, -1, 650 wm8994_devs, ARRAY_SIZE(wm8994_devs), 651 NULL, 0, NULL); 652 if (ret != 0) { 653 dev_err(wm8994->dev, "Failed to add children: %d\n", ret); 654 goto err_irq; 655 } 656 657 pm_runtime_enable(wm8994->dev); 658 pm_runtime_idle(wm8994->dev); 659 660 return 0; 661 662err_irq: 663 wm8994_irq_exit(wm8994); 664err_enable: 665 regulator_bulk_disable(wm8994->num_supplies, 666 wm8994->supplies); 667err_get: 668 regulator_bulk_free(wm8994->num_supplies, wm8994->supplies); 669err: 670 mfd_remove_devices(wm8994->dev); 671 return ret; 672} 673 674static void wm8994_device_exit(struct wm8994 *wm8994) 675{ 676 pm_runtime_disable(wm8994->dev); 677 mfd_remove_devices(wm8994->dev); 678 wm8994_irq_exit(wm8994); 679 regulator_bulk_disable(wm8994->num_supplies, 680 wm8994->supplies); 681 regulator_bulk_free(wm8994->num_supplies, wm8994->supplies); 682} 683 684static const struct of_device_id wm8994_of_match[] = { 685 { .compatible = "wlf,wm1811", }, 686 { .compatible = "wlf,wm8994", }, 687 { .compatible = "wlf,wm8958", }, 688 { } 689}; 690MODULE_DEVICE_TABLE(of, wm8994_of_match); 691 692static int wm8994_i2c_probe(struct i2c_client *i2c, 693 const struct i2c_device_id *id) 694{ 695 struct wm8994 *wm8994; 696 int ret; 697 698 wm8994 = devm_kzalloc(&i2c->dev, sizeof(struct wm8994), GFP_KERNEL); 699 if (wm8994 == NULL) 700 return -ENOMEM; 701 702 i2c_set_clientdata(i2c, wm8994); 703 wm8994->dev = &i2c->dev; 704 wm8994->irq = i2c->irq; 705 wm8994->type = id->driver_data; 706 707 wm8994->regmap = devm_regmap_init_i2c(i2c, &wm8994_base_regmap_config); 708 if (IS_ERR(wm8994->regmap)) { 709 ret = PTR_ERR(wm8994->regmap); 710 dev_err(wm8994->dev, "Failed to allocate register map: %d\n", 711 ret); 712 return ret; 713 } 714 715 return wm8994_device_init(wm8994, i2c->irq); 716} 717 718static int wm8994_i2c_remove(struct i2c_client *i2c) 719{ 720 struct wm8994 *wm8994 = i2c_get_clientdata(i2c); 721 722 wm8994_device_exit(wm8994); 723 724 return 0; 725} 726 727static const struct i2c_device_id wm8994_i2c_id[] = { 728 { "wm1811", WM1811 }, 729 { "wm1811a", WM1811 }, 730 { "wm8994", WM8994 }, 731 { "wm8958", WM8958 }, 732 { } 733}; 734MODULE_DEVICE_TABLE(i2c, wm8994_i2c_id); 735 736static UNIVERSAL_DEV_PM_OPS(wm8994_pm_ops, wm8994_suspend, wm8994_resume, 737 NULL); 738 739static struct i2c_driver wm8994_i2c_driver = { 740 .driver = { 741 .name = "wm8994", 742 .owner = THIS_MODULE, 743 .pm = &wm8994_pm_ops, 744 .of_match_table = wm8994_of_match, 745 }, 746 .probe = wm8994_i2c_probe, 747 .remove = wm8994_i2c_remove, 748 .id_table = wm8994_i2c_id, 749}; 750 751module_i2c_driver(wm8994_i2c_driver); 752 753MODULE_DESCRIPTION("Core support for the WM8994 audio CODEC"); 754MODULE_LICENSE("GPL"); 755MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); 756