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 */ 39 int 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 } 51 EXPORT_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 */ 61 int 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 */ 74 int wm8994_reg_write(struct wm8994 *wm8994, unsigned short reg, 75 unsigned short val) 76 { 77 return regmap_write(wm8994->regmap, reg, val); 78 } 79 EXPORT_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 */ 89 int 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 } 94 EXPORT_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 */ 104 int 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 } 109 EXPORT_SYMBOL_GPL(wm8994_set_bits); 110 111 static 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 }; 123 124 static struct resource wm8994_codec_resources[] = { 125 { 126 .start = WM8994_IRQ_TEMP_SHUT, 127 .end = WM8994_IRQ_TEMP_WARN, 128 .flags = IORESOURCE_IRQ, 129 }, 130 }; 131 132 static struct resource wm8994_gpio_resources[] = { 133 { 134 .start = WM8994_IRQ_GPIO(1), 135 .end = WM8994_IRQ_GPIO(11), 136 .flags = IORESOURCE_IRQ, 137 }, 138 }; 139 140 static 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 */ 160 static const char *wm1811_main_supplies[] = { 161 "DBVDD1", 162 "DBVDD2", 163 "DBVDD3", 164 "DCVDD", 165 "AVDD1", 166 "AVDD2", 167 "CPVDD", 168 "SPKVDD1", 169 "SPKVDD2", 170 }; 171 172 static const char *wm8994_main_supplies[] = { 173 "DBVDD", 174 "DCVDD", 175 "AVDD1", 176 "AVDD2", 177 "CPVDD", 178 "SPKVDD1", 179 "SPKVDD2", 180 }; 181 182 static 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 195 static 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_cache_only(wm8994->regmap, true); 287 regcache_mark_dirty(wm8994->regmap); 288 289 wm8994->suspended = true; 290 291 ret = regulator_bulk_disable(wm8994->num_supplies, 292 wm8994->supplies); 293 if (ret != 0) { 294 dev_err(dev, "Failed to disable supplies: %d\n", ret); 295 return ret; 296 } 297 298 return 0; 299 } 300 301 static int wm8994_resume(struct device *dev) 302 { 303 struct wm8994 *wm8994 = dev_get_drvdata(dev); 304 int ret; 305 306 /* We may have lied to the PM core about suspending */ 307 if (!wm8994->suspended) 308 return 0; 309 310 ret = regulator_bulk_enable(wm8994->num_supplies, 311 wm8994->supplies); 312 if (ret != 0) { 313 dev_err(dev, "Failed to enable supplies: %d\n", ret); 314 return ret; 315 } 316 317 regcache_cache_only(wm8994->regmap, false); 318 ret = regcache_sync(wm8994->regmap); 319 if (ret != 0) { 320 dev_err(dev, "Failed to restore register map: %d\n", ret); 321 goto err_enable; 322 } 323 324 /* Disable LDO pulldowns while the device is active */ 325 wm8994_set_bits(wm8994, WM8994_PULL_CONTROL_2, 326 WM8994_LDO1ENA_PD | WM8994_LDO2ENA_PD, 327 0); 328 329 wm8994->suspended = false; 330 331 return 0; 332 333 err_enable: 334 regulator_bulk_disable(wm8994->num_supplies, wm8994->supplies); 335 336 return ret; 337 } 338 #endif 339 340 #ifdef CONFIG_REGULATOR 341 static int wm8994_ldo_in_use(struct wm8994_pdata *pdata, int ldo) 342 { 343 struct wm8994_ldo_pdata *ldo_pdata; 344 345 if (!pdata) 346 return 0; 347 348 ldo_pdata = &pdata->ldo[ldo]; 349 350 if (!ldo_pdata->init_data) 351 return 0; 352 353 return ldo_pdata->init_data->num_consumer_supplies != 0; 354 } 355 #else 356 static int wm8994_ldo_in_use(struct wm8994_pdata *pdata, int ldo) 357 { 358 return 0; 359 } 360 #endif 361 362 static const __devinitdata struct reg_default wm8994_revc_patch[] = { 363 { 0x102, 0x3 }, 364 { 0x56, 0x3 }, 365 { 0x817, 0x0 }, 366 { 0x102, 0x0 }, 367 }; 368 369 static const __devinitdata struct reg_default wm8958_reva_patch[] = { 370 { 0x102, 0x3 }, 371 { 0xcb, 0x81 }, 372 { 0x817, 0x0 }, 373 { 0x102, 0x0 }, 374 }; 375 376 static const __devinitdata struct reg_default wm1811_reva_patch[] = { 377 { 0x102, 0x3 }, 378 { 0x56, 0x7 }, 379 { 0x5d, 0x7e }, 380 { 0x5e, 0x0 }, 381 { 0x102, 0x0 }, 382 }; 383 384 /* 385 * Instantiate the generic non-control parts of the device. 386 */ 387 static __devinit int wm8994_device_init(struct wm8994 *wm8994, int irq) 388 { 389 struct wm8994_pdata *pdata = wm8994->dev->platform_data; 390 struct regmap_config *regmap_config; 391 const struct reg_default *regmap_patch = NULL; 392 const char *devname; 393 int ret, i, patch_regs; 394 int pulls = 0; 395 396 dev_set_drvdata(wm8994->dev, wm8994); 397 398 /* Add the on-chip regulators first for bootstrapping */ 399 ret = mfd_add_devices(wm8994->dev, -1, 400 wm8994_regulator_devs, 401 ARRAY_SIZE(wm8994_regulator_devs), 402 NULL, 0); 403 if (ret != 0) { 404 dev_err(wm8994->dev, "Failed to add children: %d\n", ret); 405 goto err; 406 } 407 408 switch (wm8994->type) { 409 case WM1811: 410 wm8994->num_supplies = ARRAY_SIZE(wm1811_main_supplies); 411 break; 412 case WM8994: 413 wm8994->num_supplies = ARRAY_SIZE(wm8994_main_supplies); 414 break; 415 case WM8958: 416 wm8994->num_supplies = ARRAY_SIZE(wm8958_main_supplies); 417 break; 418 default: 419 BUG(); 420 goto err; 421 } 422 423 wm8994->supplies = devm_kzalloc(wm8994->dev, 424 sizeof(struct regulator_bulk_data) * 425 wm8994->num_supplies, GFP_KERNEL); 426 if (!wm8994->supplies) { 427 ret = -ENOMEM; 428 goto err; 429 } 430 431 switch (wm8994->type) { 432 case WM1811: 433 for (i = 0; i < ARRAY_SIZE(wm1811_main_supplies); i++) 434 wm8994->supplies[i].supply = wm1811_main_supplies[i]; 435 break; 436 case WM8994: 437 for (i = 0; i < ARRAY_SIZE(wm8994_main_supplies); i++) 438 wm8994->supplies[i].supply = wm8994_main_supplies[i]; 439 break; 440 case WM8958: 441 for (i = 0; i < ARRAY_SIZE(wm8958_main_supplies); i++) 442 wm8994->supplies[i].supply = wm8958_main_supplies[i]; 443 break; 444 default: 445 BUG(); 446 goto err; 447 } 448 449 ret = regulator_bulk_get(wm8994->dev, wm8994->num_supplies, 450 wm8994->supplies); 451 if (ret != 0) { 452 dev_err(wm8994->dev, "Failed to get supplies: %d\n", ret); 453 goto err; 454 } 455 456 ret = regulator_bulk_enable(wm8994->num_supplies, 457 wm8994->supplies); 458 if (ret != 0) { 459 dev_err(wm8994->dev, "Failed to enable supplies: %d\n", ret); 460 goto err_get; 461 } 462 463 ret = wm8994_reg_read(wm8994, WM8994_SOFTWARE_RESET); 464 if (ret < 0) { 465 dev_err(wm8994->dev, "Failed to read ID register\n"); 466 goto err_enable; 467 } 468 switch (ret) { 469 case 0x1811: 470 devname = "WM1811"; 471 if (wm8994->type != WM1811) 472 dev_warn(wm8994->dev, "Device registered as type %d\n", 473 wm8994->type); 474 wm8994->type = WM1811; 475 break; 476 case 0x8994: 477 devname = "WM8994"; 478 if (wm8994->type != WM8994) 479 dev_warn(wm8994->dev, "Device registered as type %d\n", 480 wm8994->type); 481 wm8994->type = WM8994; 482 break; 483 case 0x8958: 484 devname = "WM8958"; 485 if (wm8994->type != WM8958) 486 dev_warn(wm8994->dev, "Device registered as type %d\n", 487 wm8994->type); 488 wm8994->type = WM8958; 489 break; 490 default: 491 dev_err(wm8994->dev, "Device is not a WM8994, ID is %x\n", 492 ret); 493 ret = -EINVAL; 494 goto err_enable; 495 } 496 497 ret = wm8994_reg_read(wm8994, WM8994_CHIP_REVISION); 498 if (ret < 0) { 499 dev_err(wm8994->dev, "Failed to read revision register: %d\n", 500 ret); 501 goto err_enable; 502 } 503 wm8994->revision = ret & WM8994_CHIP_REV_MASK; 504 wm8994->cust_id = (ret & WM8994_CUST_ID_MASK) >> WM8994_CUST_ID_SHIFT; 505 506 switch (wm8994->type) { 507 case WM8994: 508 switch (wm8994->revision) { 509 case 0: 510 case 1: 511 dev_warn(wm8994->dev, 512 "revision %c not fully supported\n", 513 'A' + wm8994->revision); 514 break; 515 case 2: 516 case 3: 517 regmap_patch = wm8994_revc_patch; 518 patch_regs = ARRAY_SIZE(wm8994_revc_patch); 519 break; 520 default: 521 break; 522 } 523 break; 524 525 case WM8958: 526 switch (wm8994->revision) { 527 case 0: 528 regmap_patch = wm8958_reva_patch; 529 patch_regs = ARRAY_SIZE(wm8958_reva_patch); 530 break; 531 default: 532 break; 533 } 534 break; 535 536 case WM1811: 537 /* Revision C did not change the relevant layer */ 538 if (wm8994->revision > 1) 539 wm8994->revision++; 540 switch (wm8994->revision) { 541 case 0: 542 case 1: 543 case 2: 544 case 3: 545 regmap_patch = wm1811_reva_patch; 546 patch_regs = ARRAY_SIZE(wm1811_reva_patch); 547 break; 548 default: 549 break; 550 } 551 break; 552 553 default: 554 break; 555 } 556 557 dev_info(wm8994->dev, "%s revision %c CUST_ID %02x\n", devname, 558 'A' + wm8994->revision, wm8994->cust_id); 559 560 switch (wm8994->type) { 561 case WM1811: 562 regmap_config = &wm1811_regmap_config; 563 break; 564 case WM8994: 565 regmap_config = &wm8994_regmap_config; 566 break; 567 case WM8958: 568 regmap_config = &wm8958_regmap_config; 569 break; 570 default: 571 dev_err(wm8994->dev, "Unknown device type %d\n", wm8994->type); 572 return -EINVAL; 573 } 574 575 ret = regmap_reinit_cache(wm8994->regmap, regmap_config); 576 if (ret != 0) { 577 dev_err(wm8994->dev, "Failed to reinit register cache: %d\n", 578 ret); 579 return ret; 580 } 581 582 if (regmap_patch) { 583 ret = regmap_register_patch(wm8994->regmap, regmap_patch, 584 patch_regs); 585 if (ret != 0) { 586 dev_err(wm8994->dev, "Failed to register patch: %d\n", 587 ret); 588 goto err; 589 } 590 } 591 592 if (pdata) { 593 wm8994->irq_base = pdata->irq_base; 594 wm8994->gpio_base = pdata->gpio_base; 595 596 /* GPIO configuration is only applied if it's non-zero */ 597 for (i = 0; i < ARRAY_SIZE(pdata->gpio_defaults); i++) { 598 if (pdata->gpio_defaults[i]) { 599 wm8994_set_bits(wm8994, WM8994_GPIO_1 + i, 600 0xffff, 601 pdata->gpio_defaults[i]); 602 } 603 } 604 605 wm8994->ldo_ena_always_driven = pdata->ldo_ena_always_driven; 606 607 if (pdata->spkmode_pu) 608 pulls |= WM8994_SPKMODE_PU; 609 } 610 611 /* Disable unneeded pulls */ 612 wm8994_set_bits(wm8994, WM8994_PULL_CONTROL_2, 613 WM8994_LDO1ENA_PD | WM8994_LDO2ENA_PD | 614 WM8994_SPKMODE_PU | WM8994_CSNADDR_PD, 615 pulls); 616 617 /* In some system designs where the regulators are not in use, 618 * we can achieve a small reduction in leakage currents by 619 * floating LDO outputs. This bit makes no difference if the 620 * LDOs are enabled, it only affects cases where the LDOs were 621 * in operation and are then disabled. 622 */ 623 for (i = 0; i < WM8994_NUM_LDO_REGS; i++) { 624 if (wm8994_ldo_in_use(pdata, i)) 625 wm8994_set_bits(wm8994, WM8994_LDO_1 + i, 626 WM8994_LDO1_DISCH, WM8994_LDO1_DISCH); 627 else 628 wm8994_set_bits(wm8994, WM8994_LDO_1 + i, 629 WM8994_LDO1_DISCH, 0); 630 } 631 632 wm8994_irq_init(wm8994); 633 634 ret = mfd_add_devices(wm8994->dev, -1, 635 wm8994_devs, ARRAY_SIZE(wm8994_devs), 636 NULL, 0); 637 if (ret != 0) { 638 dev_err(wm8994->dev, "Failed to add children: %d\n", ret); 639 goto err_irq; 640 } 641 642 pm_runtime_enable(wm8994->dev); 643 pm_runtime_idle(wm8994->dev); 644 645 return 0; 646 647 err_irq: 648 wm8994_irq_exit(wm8994); 649 err_enable: 650 regulator_bulk_disable(wm8994->num_supplies, 651 wm8994->supplies); 652 err_get: 653 regulator_bulk_free(wm8994->num_supplies, wm8994->supplies); 654 err: 655 mfd_remove_devices(wm8994->dev); 656 return ret; 657 } 658 659 static __devexit void wm8994_device_exit(struct wm8994 *wm8994) 660 { 661 pm_runtime_disable(wm8994->dev); 662 mfd_remove_devices(wm8994->dev); 663 wm8994_irq_exit(wm8994); 664 regulator_bulk_disable(wm8994->num_supplies, 665 wm8994->supplies); 666 regulator_bulk_free(wm8994->num_supplies, wm8994->supplies); 667 } 668 669 static const struct of_device_id wm8994_of_match[] = { 670 { .compatible = "wlf,wm1811", }, 671 { .compatible = "wlf,wm8994", }, 672 { .compatible = "wlf,wm8958", }, 673 { } 674 }; 675 MODULE_DEVICE_TABLE(of, wm8994_of_match); 676 677 static __devinit int wm8994_i2c_probe(struct i2c_client *i2c, 678 const struct i2c_device_id *id) 679 { 680 struct wm8994 *wm8994; 681 int ret; 682 683 wm8994 = devm_kzalloc(&i2c->dev, sizeof(struct wm8994), GFP_KERNEL); 684 if (wm8994 == NULL) 685 return -ENOMEM; 686 687 i2c_set_clientdata(i2c, wm8994); 688 wm8994->dev = &i2c->dev; 689 wm8994->irq = i2c->irq; 690 wm8994->type = id->driver_data; 691 692 wm8994->regmap = devm_regmap_init_i2c(i2c, &wm8994_base_regmap_config); 693 if (IS_ERR(wm8994->regmap)) { 694 ret = PTR_ERR(wm8994->regmap); 695 dev_err(wm8994->dev, "Failed to allocate register map: %d\n", 696 ret); 697 return ret; 698 } 699 700 return wm8994_device_init(wm8994, i2c->irq); 701 } 702 703 static __devexit int wm8994_i2c_remove(struct i2c_client *i2c) 704 { 705 struct wm8994 *wm8994 = i2c_get_clientdata(i2c); 706 707 wm8994_device_exit(wm8994); 708 709 return 0; 710 } 711 712 static const struct i2c_device_id wm8994_i2c_id[] = { 713 { "wm1811", WM1811 }, 714 { "wm1811a", WM1811 }, 715 { "wm8994", WM8994 }, 716 { "wm8958", WM8958 }, 717 { } 718 }; 719 MODULE_DEVICE_TABLE(i2c, wm8994_i2c_id); 720 721 static UNIVERSAL_DEV_PM_OPS(wm8994_pm_ops, wm8994_suspend, wm8994_resume, 722 NULL); 723 724 static struct i2c_driver wm8994_i2c_driver = { 725 .driver = { 726 .name = "wm8994", 727 .owner = THIS_MODULE, 728 .pm = &wm8994_pm_ops, 729 .of_match_table = wm8994_of_match, 730 }, 731 .probe = wm8994_i2c_probe, 732 .remove = __devexit_p(wm8994_i2c_remove), 733 .id_table = wm8994_i2c_id, 734 }; 735 736 module_i2c_driver(wm8994_i2c_driver); 737 738 MODULE_DESCRIPTION("Core support for the WM8994 audio CODEC"); 739 MODULE_LICENSE("GPL"); 740 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); 741