wm8994-core.c revision da002d8924a49e8d8e289d07d46339e12dd56899
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/of.h> 23#include <linux/of_device.h> 24#include <linux/of_gpio.h> 25#include <linux/pm_runtime.h> 26#include <linux/regmap.h> 27#include <linux/regulator/consumer.h> 28#include <linux/regulator/machine.h> 29 30#include <linux/mfd/wm8994/core.h> 31#include <linux/mfd/wm8994/pdata.h> 32#include <linux/mfd/wm8994/registers.h> 33 34#include "wm8994.h" 35 36/** 37 * wm8994_reg_read: Read a single WM8994 register. 38 * 39 * @wm8994: Device to read from. 40 * @reg: Register to read. 41 */ 42int wm8994_reg_read(struct wm8994 *wm8994, unsigned short reg) 43{ 44 unsigned int val; 45 int ret; 46 47 ret = regmap_read(wm8994->regmap, reg, &val); 48 49 if (ret < 0) 50 return ret; 51 else 52 return val; 53} 54EXPORT_SYMBOL_GPL(wm8994_reg_read); 55 56/** 57 * wm8994_bulk_read: Read multiple WM8994 registers 58 * 59 * @wm8994: Device to read from 60 * @reg: First register 61 * @count: Number of registers 62 * @buf: Buffer to fill. The data will be returned big endian. 63 */ 64int wm8994_bulk_read(struct wm8994 *wm8994, unsigned short reg, 65 int count, u16 *buf) 66{ 67 return regmap_bulk_read(wm8994->regmap, reg, buf, count); 68} 69 70/** 71 * wm8994_reg_write: Write a single WM8994 register. 72 * 73 * @wm8994: Device to write to. 74 * @reg: Register to write to. 75 * @val: Value to write. 76 */ 77int wm8994_reg_write(struct wm8994 *wm8994, unsigned short reg, 78 unsigned short val) 79{ 80 return regmap_write(wm8994->regmap, reg, val); 81} 82EXPORT_SYMBOL_GPL(wm8994_reg_write); 83 84/** 85 * wm8994_bulk_write: Write multiple WM8994 registers 86 * 87 * @wm8994: Device to write to 88 * @reg: First register 89 * @count: Number of registers 90 * @buf: Buffer to write from. Data must be big-endian formatted. 91 */ 92int wm8994_bulk_write(struct wm8994 *wm8994, unsigned short reg, 93 int count, const u16 *buf) 94{ 95 return regmap_raw_write(wm8994->regmap, reg, buf, count * sizeof(u16)); 96} 97EXPORT_SYMBOL_GPL(wm8994_bulk_write); 98 99/** 100 * wm8994_set_bits: Set the value of a bitfield in a WM8994 register 101 * 102 * @wm8994: Device to write to. 103 * @reg: Register to write to. 104 * @mask: Mask of bits to set. 105 * @val: Value to set (unshifted) 106 */ 107int wm8994_set_bits(struct wm8994 *wm8994, unsigned short reg, 108 unsigned short mask, unsigned short val) 109{ 110 return regmap_update_bits(wm8994->regmap, reg, mask, val); 111} 112EXPORT_SYMBOL_GPL(wm8994_set_bits); 113 114static struct mfd_cell wm8994_regulator_devs[] = { 115 { 116 .name = "wm8994-ldo", 117 .id = 1, 118 .pm_runtime_no_callbacks = true, 119 }, 120 { 121 .name = "wm8994-ldo", 122 .id = 2, 123 .pm_runtime_no_callbacks = true, 124 }, 125}; 126 127static struct resource wm8994_codec_resources[] = { 128 { 129 .start = WM8994_IRQ_TEMP_SHUT, 130 .end = WM8994_IRQ_TEMP_WARN, 131 .flags = IORESOURCE_IRQ, 132 }, 133}; 134 135static struct resource wm8994_gpio_resources[] = { 136 { 137 .start = WM8994_IRQ_GPIO(1), 138 .end = WM8994_IRQ_GPIO(11), 139 .flags = IORESOURCE_IRQ, 140 }, 141}; 142 143static struct mfd_cell wm8994_devs[] = { 144 { 145 .name = "wm8994-codec", 146 .num_resources = ARRAY_SIZE(wm8994_codec_resources), 147 .resources = wm8994_codec_resources, 148 }, 149 150 { 151 .name = "wm8994-gpio", 152 .num_resources = ARRAY_SIZE(wm8994_gpio_resources), 153 .resources = wm8994_gpio_resources, 154 .pm_runtime_no_callbacks = true, 155 }, 156}; 157 158/* 159 * Supplies for the main bulk of CODEC; the LDO supplies are ignored 160 * and should be handled via the standard regulator API supply 161 * management. 162 */ 163static const char *wm1811_main_supplies[] = { 164 "DBVDD1", 165 "DBVDD2", 166 "DBVDD3", 167 "DCVDD", 168 "AVDD1", 169 "AVDD2", 170 "CPVDD", 171 "SPKVDD1", 172 "SPKVDD2", 173}; 174 175static const char *wm8994_main_supplies[] = { 176 "DBVDD", 177 "DCVDD", 178 "AVDD1", 179 "AVDD2", 180 "CPVDD", 181 "SPKVDD1", 182 "SPKVDD2", 183}; 184 185static const char *wm8958_main_supplies[] = { 186 "DBVDD1", 187 "DBVDD2", 188 "DBVDD3", 189 "DCVDD", 190 "AVDD1", 191 "AVDD2", 192 "CPVDD", 193 "SPKVDD1", 194 "SPKVDD2", 195}; 196 197#ifdef CONFIG_PM_RUNTIME 198static int wm8994_suspend(struct device *dev) 199{ 200 struct wm8994 *wm8994 = dev_get_drvdata(dev); 201 int ret; 202 203 /* Don't actually go through with the suspend if the CODEC is 204 * still active (eg, for audio passthrough from CP. */ 205 ret = wm8994_reg_read(wm8994, WM8994_POWER_MANAGEMENT_1); 206 if (ret < 0) { 207 dev_err(dev, "Failed to read power status: %d\n", ret); 208 } else if (ret & WM8994_VMID_SEL_MASK) { 209 dev_dbg(dev, "CODEC still active, ignoring suspend\n"); 210 return 0; 211 } 212 213 ret = wm8994_reg_read(wm8994, WM8994_POWER_MANAGEMENT_4); 214 if (ret < 0) { 215 dev_err(dev, "Failed to read power status: %d\n", ret); 216 } else if (ret & (WM8994_AIF2ADCL_ENA | WM8994_AIF2ADCR_ENA | 217 WM8994_AIF1ADC2L_ENA | WM8994_AIF1ADC2R_ENA | 218 WM8994_AIF1ADC1L_ENA | WM8994_AIF1ADC1R_ENA)) { 219 dev_dbg(dev, "CODEC still active, ignoring suspend\n"); 220 return 0; 221 } 222 223 ret = wm8994_reg_read(wm8994, WM8994_POWER_MANAGEMENT_5); 224 if (ret < 0) { 225 dev_err(dev, "Failed to read power status: %d\n", ret); 226 } else if (ret & (WM8994_AIF2DACL_ENA | WM8994_AIF2DACR_ENA | 227 WM8994_AIF1DAC2L_ENA | WM8994_AIF1DAC2R_ENA | 228 WM8994_AIF1DAC1L_ENA | WM8994_AIF1DAC1R_ENA)) { 229 dev_dbg(dev, "CODEC still active, ignoring suspend\n"); 230 return 0; 231 } 232 233 switch (wm8994->type) { 234 case WM8958: 235 case WM1811: 236 ret = wm8994_reg_read(wm8994, WM8958_MIC_DETECT_1); 237 if (ret < 0) { 238 dev_err(dev, "Failed to read power status: %d\n", ret); 239 } else if (ret & WM8958_MICD_ENA) { 240 dev_dbg(dev, "CODEC still active, ignoring suspend\n"); 241 return 0; 242 } 243 break; 244 default: 245 break; 246 } 247 248 switch (wm8994->type) { 249 case WM1811: 250 ret = wm8994_reg_read(wm8994, WM8994_ANTIPOP_2); 251 if (ret < 0) { 252 dev_err(dev, "Failed to read jackdet: %d\n", ret); 253 } else if (ret & WM1811_JACKDET_MODE_MASK) { 254 dev_dbg(dev, "CODEC still active, ignoring suspend\n"); 255 return 0; 256 } 257 break; 258 default: 259 break; 260 } 261 262 /* Disable LDO pulldowns while the device is suspended if we 263 * don't know that something will be driving them. */ 264 if (!wm8994->ldo_ena_always_driven) 265 wm8994_set_bits(wm8994, WM8994_PULL_CONTROL_2, 266 WM8994_LDO1ENA_PD | WM8994_LDO2ENA_PD, 267 WM8994_LDO1ENA_PD | WM8994_LDO2ENA_PD); 268 269 /* Explicitly put the device into reset in case regulators 270 * don't get disabled in order to ensure consistent restart. 271 */ 272 wm8994_reg_write(wm8994, WM8994_SOFTWARE_RESET, 273 wm8994_reg_read(wm8994, WM8994_SOFTWARE_RESET)); 274 275 regcache_mark_dirty(wm8994->regmap); 276 277 /* Restore GPIO registers to prevent problems with mismatched 278 * pin configurations. 279 */ 280 ret = regcache_sync_region(wm8994->regmap, WM8994_GPIO_1, 281 WM8994_GPIO_11); 282 if (ret != 0) 283 dev_err(dev, "Failed to restore GPIO registers: %d\n", ret); 284 285 /* In case one of the GPIOs is used as a wake input. */ 286 ret = regcache_sync_region(wm8994->regmap, 287 WM8994_INTERRUPT_STATUS_1_MASK, 288 WM8994_INTERRUPT_STATUS_1_MASK); 289 if (ret != 0) 290 dev_err(dev, "Failed to restore interrupt mask: %d\n", ret); 291 292 regcache_cache_only(wm8994->regmap, true); 293 wm8994->suspended = true; 294 295 ret = regulator_bulk_disable(wm8994->num_supplies, 296 wm8994->supplies); 297 if (ret != 0) { 298 dev_err(dev, "Failed to disable supplies: %d\n", ret); 299 return ret; 300 } 301 302 return 0; 303} 304 305static int wm8994_resume(struct device *dev) 306{ 307 struct wm8994 *wm8994 = dev_get_drvdata(dev); 308 int ret; 309 310 /* We may have lied to the PM core about suspending */ 311 if (!wm8994->suspended) 312 return 0; 313 314 ret = regulator_bulk_enable(wm8994->num_supplies, 315 wm8994->supplies); 316 if (ret != 0) { 317 dev_err(dev, "Failed to enable supplies: %d\n", ret); 318 return ret; 319 } 320 321 regcache_cache_only(wm8994->regmap, false); 322 ret = regcache_sync(wm8994->regmap); 323 if (ret != 0) { 324 dev_err(dev, "Failed to restore register map: %d\n", ret); 325 goto err_enable; 326 } 327 328 /* Disable LDO pulldowns while the device is active */ 329 wm8994_set_bits(wm8994, WM8994_PULL_CONTROL_2, 330 WM8994_LDO1ENA_PD | WM8994_LDO2ENA_PD, 331 0); 332 333 wm8994->suspended = false; 334 335 return 0; 336 337err_enable: 338 regulator_bulk_disable(wm8994->num_supplies, wm8994->supplies); 339 340 return ret; 341} 342#endif 343 344#ifdef CONFIG_REGULATOR 345static int wm8994_ldo_in_use(struct wm8994_pdata *pdata, int ldo) 346{ 347 struct wm8994_ldo_pdata *ldo_pdata; 348 349 if (!pdata) 350 return 0; 351 352 ldo_pdata = &pdata->ldo[ldo]; 353 354 if (!ldo_pdata->init_data) 355 return 0; 356 357 return ldo_pdata->init_data->num_consumer_supplies != 0; 358} 359#else 360static int wm8994_ldo_in_use(struct wm8994_pdata *pdata, int ldo) 361{ 362 return 0; 363} 364#endif 365 366static const struct reg_default wm8994_revc_patch[] = { 367 { 0x102, 0x3 }, 368 { 0x56, 0x3 }, 369 { 0x817, 0x0 }, 370 { 0x102, 0x0 }, 371}; 372 373static const struct reg_default wm8958_reva_patch[] = { 374 { 0x102, 0x3 }, 375 { 0xcb, 0x81 }, 376 { 0x817, 0x0 }, 377 { 0x102, 0x0 }, 378}; 379 380static const struct reg_default wm1811_reva_patch[] = { 381 { 0x102, 0x3 }, 382 { 0x56, 0xc07 }, 383 { 0x5d, 0x7e }, 384 { 0x5e, 0x0 }, 385 { 0x102, 0x0 }, 386}; 387 388#ifdef CONFIG_OF 389static int wm8994_set_pdata_from_of(struct wm8994 *wm8994) 390{ 391 struct device_node *np = wm8994->dev->of_node; 392 struct wm8994_pdata *pdata = &wm8994->pdata; 393 int i; 394 395 if (!np) 396 return 0; 397 398 if (of_property_read_u32_array(np, "wlf,gpio-cfg", pdata->gpio_defaults, 399 ARRAY_SIZE(pdata->gpio_defaults)) >= 0) { 400 for (i = 0; i < ARRAY_SIZE(pdata->gpio_defaults); i++) { 401 if (wm8994->pdata.gpio_defaults[i] == 0) 402 pdata->gpio_defaults[i] 403 = WM8994_CONFIGURE_GPIO; 404 } 405 } 406 407 of_property_read_u32_array(np, "wlf,micbias-cfg", pdata->micbias, 408 ARRAY_SIZE(pdata->micbias)); 409 410 pdata->lineout1_diff = true; 411 pdata->lineout2_diff = true; 412 if (of_find_property(np, "wlf,lineout1-se", NULL)) 413 pdata->lineout1_diff = false; 414 if (of_find_property(np, "wlf,lineout2-se", NULL)) 415 pdata->lineout2_diff = false; 416 417 if (of_find_property(np, "wlf,lineout1-feedback", NULL)) 418 pdata->lineout1fb = true; 419 if (of_find_property(np, "wlf,lineout2-feedback", NULL)) 420 pdata->lineout2fb = true; 421 422 if (of_find_property(np, "wlf,ldoena-always-driven", NULL)) 423 pdata->lineout2fb = true; 424 425 pdata->ldo[0].enable = of_get_named_gpio(np, "wlf,ldo1ena", 0); 426 if (pdata->ldo[0].enable < 0) 427 pdata->ldo[0].enable = 0; 428 429 pdata->ldo[1].enable = of_get_named_gpio(np, "wlf,ldo2ena", 0); 430 if (pdata->ldo[1].enable < 0) 431 pdata->ldo[1].enable = 0; 432 433 return 0; 434} 435#else 436static int wm8994_set_pdata_from_of(struct wm8994 *wm8994) 437{ 438 return 0; 439} 440#endif 441 442/* 443 * Instantiate the generic non-control parts of the device. 444 */ 445static int wm8994_device_init(struct wm8994 *wm8994, int irq) 446{ 447 struct wm8994_pdata *pdata; 448 struct regmap_config *regmap_config; 449 const struct reg_default *regmap_patch = NULL; 450 const char *devname; 451 int ret, i, patch_regs = 0; 452 int pulls = 0; 453 454 if (dev_get_platdata(wm8994->dev)) { 455 pdata = dev_get_platdata(wm8994->dev); 456 wm8994->pdata = *pdata; 457 } 458 pdata = &wm8994->pdata; 459 460 ret = wm8994_set_pdata_from_of(wm8994); 461 if (ret != 0) 462 return ret; 463 464 dev_set_drvdata(wm8994->dev, wm8994); 465 466 /* Add the on-chip regulators first for bootstrapping */ 467 ret = mfd_add_devices(wm8994->dev, -1, 468 wm8994_regulator_devs, 469 ARRAY_SIZE(wm8994_regulator_devs), 470 NULL, 0, NULL); 471 if (ret != 0) { 472 dev_err(wm8994->dev, "Failed to add children: %d\n", ret); 473 goto err; 474 } 475 476 switch (wm8994->type) { 477 case WM1811: 478 wm8994->num_supplies = ARRAY_SIZE(wm1811_main_supplies); 479 break; 480 case WM8994: 481 wm8994->num_supplies = ARRAY_SIZE(wm8994_main_supplies); 482 break; 483 case WM8958: 484 wm8994->num_supplies = ARRAY_SIZE(wm8958_main_supplies); 485 break; 486 default: 487 BUG(); 488 goto err; 489 } 490 491 wm8994->supplies = devm_kzalloc(wm8994->dev, 492 sizeof(struct regulator_bulk_data) * 493 wm8994->num_supplies, GFP_KERNEL); 494 if (!wm8994->supplies) { 495 ret = -ENOMEM; 496 goto err; 497 } 498 499 switch (wm8994->type) { 500 case WM1811: 501 for (i = 0; i < ARRAY_SIZE(wm1811_main_supplies); i++) 502 wm8994->supplies[i].supply = wm1811_main_supplies[i]; 503 break; 504 case WM8994: 505 for (i = 0; i < ARRAY_SIZE(wm8994_main_supplies); i++) 506 wm8994->supplies[i].supply = wm8994_main_supplies[i]; 507 break; 508 case WM8958: 509 for (i = 0; i < ARRAY_SIZE(wm8958_main_supplies); i++) 510 wm8994->supplies[i].supply = wm8958_main_supplies[i]; 511 break; 512 default: 513 BUG(); 514 goto err; 515 } 516 517 ret = devm_regulator_bulk_get(wm8994->dev, wm8994->num_supplies, 518 wm8994->supplies); 519 if (ret != 0) { 520 dev_err(wm8994->dev, "Failed to get supplies: %d\n", ret); 521 goto err; 522 } 523 524 ret = regulator_bulk_enable(wm8994->num_supplies, 525 wm8994->supplies); 526 if (ret != 0) { 527 dev_err(wm8994->dev, "Failed to enable supplies: %d\n", ret); 528 goto err; 529 } 530 531 ret = wm8994_reg_read(wm8994, WM8994_SOFTWARE_RESET); 532 if (ret < 0) { 533 dev_err(wm8994->dev, "Failed to read ID register\n"); 534 goto err_enable; 535 } 536 switch (ret) { 537 case 0x1811: 538 devname = "WM1811"; 539 if (wm8994->type != WM1811) 540 dev_warn(wm8994->dev, "Device registered as type %d\n", 541 wm8994->type); 542 wm8994->type = WM1811; 543 break; 544 case 0x8994: 545 devname = "WM8994"; 546 if (wm8994->type != WM8994) 547 dev_warn(wm8994->dev, "Device registered as type %d\n", 548 wm8994->type); 549 wm8994->type = WM8994; 550 break; 551 case 0x8958: 552 devname = "WM8958"; 553 if (wm8994->type != WM8958) 554 dev_warn(wm8994->dev, "Device registered as type %d\n", 555 wm8994->type); 556 wm8994->type = WM8958; 557 break; 558 default: 559 dev_err(wm8994->dev, "Device is not a WM8994, ID is %x\n", 560 ret); 561 ret = -EINVAL; 562 goto err_enable; 563 } 564 565 ret = wm8994_reg_read(wm8994, WM8994_CHIP_REVISION); 566 if (ret < 0) { 567 dev_err(wm8994->dev, "Failed to read revision register: %d\n", 568 ret); 569 goto err_enable; 570 } 571 wm8994->revision = ret & WM8994_CHIP_REV_MASK; 572 wm8994->cust_id = (ret & WM8994_CUST_ID_MASK) >> WM8994_CUST_ID_SHIFT; 573 574 switch (wm8994->type) { 575 case WM8994: 576 switch (wm8994->revision) { 577 case 0: 578 case 1: 579 dev_warn(wm8994->dev, 580 "revision %c not fully supported\n", 581 'A' + wm8994->revision); 582 break; 583 case 2: 584 case 3: 585 default: 586 regmap_patch = wm8994_revc_patch; 587 patch_regs = ARRAY_SIZE(wm8994_revc_patch); 588 break; 589 } 590 break; 591 592 case WM8958: 593 switch (wm8994->revision) { 594 case 0: 595 regmap_patch = wm8958_reva_patch; 596 patch_regs = ARRAY_SIZE(wm8958_reva_patch); 597 break; 598 default: 599 break; 600 } 601 break; 602 603 case WM1811: 604 /* Revision C did not change the relevant layer */ 605 if (wm8994->revision > 1) 606 wm8994->revision++; 607 608 regmap_patch = wm1811_reva_patch; 609 patch_regs = ARRAY_SIZE(wm1811_reva_patch); 610 break; 611 612 default: 613 break; 614 } 615 616 dev_info(wm8994->dev, "%s revision %c CUST_ID %02x\n", devname, 617 'A' + wm8994->revision, wm8994->cust_id); 618 619 switch (wm8994->type) { 620 case WM1811: 621 regmap_config = &wm1811_regmap_config; 622 break; 623 case WM8994: 624 regmap_config = &wm8994_regmap_config; 625 break; 626 case WM8958: 627 regmap_config = &wm8958_regmap_config; 628 break; 629 default: 630 dev_err(wm8994->dev, "Unknown device type %d\n", wm8994->type); 631 return -EINVAL; 632 } 633 634 ret = regmap_reinit_cache(wm8994->regmap, regmap_config); 635 if (ret != 0) { 636 dev_err(wm8994->dev, "Failed to reinit register cache: %d\n", 637 ret); 638 return ret; 639 } 640 641 /* Explicitly put the device into reset in case regulators 642 * don't get disabled in order to ensure we know the device 643 * state. 644 */ 645 ret = wm8994_reg_write(wm8994, WM8994_SOFTWARE_RESET, 646 wm8994_reg_read(wm8994, WM8994_SOFTWARE_RESET)); 647 if (ret != 0) { 648 dev_err(wm8994->dev, "Failed to reset device: %d\n", ret); 649 return ret; 650 } 651 652 if (regmap_patch) { 653 ret = regmap_register_patch(wm8994->regmap, regmap_patch, 654 patch_regs); 655 if (ret != 0) { 656 dev_err(wm8994->dev, "Failed to register patch: %d\n", 657 ret); 658 goto err; 659 } 660 } 661 662 wm8994->irq_base = pdata->irq_base; 663 wm8994->gpio_base = pdata->gpio_base; 664 665 /* GPIO configuration is only applied if it's non-zero */ 666 for (i = 0; i < ARRAY_SIZE(pdata->gpio_defaults); i++) { 667 if (pdata->gpio_defaults[i]) { 668 wm8994_set_bits(wm8994, WM8994_GPIO_1 + i, 669 0xffff, pdata->gpio_defaults[i]); 670 } 671 } 672 673 wm8994->ldo_ena_always_driven = pdata->ldo_ena_always_driven; 674 675 if (pdata->spkmode_pu) 676 pulls |= WM8994_SPKMODE_PU; 677 678 /* Disable unneeded pulls */ 679 wm8994_set_bits(wm8994, WM8994_PULL_CONTROL_2, 680 WM8994_LDO1ENA_PD | WM8994_LDO2ENA_PD | 681 WM8994_SPKMODE_PU | WM8994_CSNADDR_PD, 682 pulls); 683 684 /* In some system designs where the regulators are not in use, 685 * we can achieve a small reduction in leakage currents by 686 * floating LDO outputs. This bit makes no difference if the 687 * LDOs are enabled, it only affects cases where the LDOs were 688 * in operation and are then disabled. 689 */ 690 for (i = 0; i < WM8994_NUM_LDO_REGS; i++) { 691 if (wm8994_ldo_in_use(pdata, i)) 692 wm8994_set_bits(wm8994, WM8994_LDO_1 + i, 693 WM8994_LDO1_DISCH, WM8994_LDO1_DISCH); 694 else 695 wm8994_set_bits(wm8994, WM8994_LDO_1 + i, 696 WM8994_LDO1_DISCH, 0); 697 } 698 699 wm8994_irq_init(wm8994); 700 701 ret = mfd_add_devices(wm8994->dev, -1, 702 wm8994_devs, ARRAY_SIZE(wm8994_devs), 703 NULL, 0, NULL); 704 if (ret != 0) { 705 dev_err(wm8994->dev, "Failed to add children: %d\n", ret); 706 goto err_irq; 707 } 708 709 pm_runtime_enable(wm8994->dev); 710 pm_runtime_idle(wm8994->dev); 711 712 return 0; 713 714err_irq: 715 wm8994_irq_exit(wm8994); 716err_enable: 717 regulator_bulk_disable(wm8994->num_supplies, 718 wm8994->supplies); 719err: 720 mfd_remove_devices(wm8994->dev); 721 return ret; 722} 723 724static void wm8994_device_exit(struct wm8994 *wm8994) 725{ 726 pm_runtime_disable(wm8994->dev); 727 mfd_remove_devices(wm8994->dev); 728 wm8994_irq_exit(wm8994); 729 regulator_bulk_disable(wm8994->num_supplies, 730 wm8994->supplies); 731} 732 733static const struct of_device_id wm8994_of_match[] = { 734 { .compatible = "wlf,wm1811", .data = (void *)WM1811 }, 735 { .compatible = "wlf,wm8994", .data = (void *)WM8994 }, 736 { .compatible = "wlf,wm8958", .data = (void *)WM8958 }, 737 { } 738}; 739MODULE_DEVICE_TABLE(of, wm8994_of_match); 740 741static int wm8994_i2c_probe(struct i2c_client *i2c, 742 const struct i2c_device_id *id) 743{ 744 const struct of_device_id *of_id; 745 struct wm8994 *wm8994; 746 int ret; 747 748 wm8994 = devm_kzalloc(&i2c->dev, sizeof(struct wm8994), GFP_KERNEL); 749 if (wm8994 == NULL) 750 return -ENOMEM; 751 752 i2c_set_clientdata(i2c, wm8994); 753 wm8994->dev = &i2c->dev; 754 wm8994->irq = i2c->irq; 755 756 if (i2c->dev.of_node) { 757 of_id = of_match_device(wm8994_of_match, &i2c->dev); 758 if (of_id) 759 wm8994->type = (int)of_id->data; 760 } else { 761 wm8994->type = id->driver_data; 762 } 763 764 wm8994->regmap = devm_regmap_init_i2c(i2c, &wm8994_base_regmap_config); 765 if (IS_ERR(wm8994->regmap)) { 766 ret = PTR_ERR(wm8994->regmap); 767 dev_err(wm8994->dev, "Failed to allocate register map: %d\n", 768 ret); 769 return ret; 770 } 771 772 return wm8994_device_init(wm8994, i2c->irq); 773} 774 775static int wm8994_i2c_remove(struct i2c_client *i2c) 776{ 777 struct wm8994 *wm8994 = i2c_get_clientdata(i2c); 778 779 wm8994_device_exit(wm8994); 780 781 return 0; 782} 783 784static const struct i2c_device_id wm8994_i2c_id[] = { 785 { "wm1811", WM1811 }, 786 { "wm1811a", WM1811 }, 787 { "wm8994", WM8994 }, 788 { "wm8958", WM8958 }, 789 { } 790}; 791MODULE_DEVICE_TABLE(i2c, wm8994_i2c_id); 792 793static const struct dev_pm_ops wm8994_pm_ops = { 794 SET_RUNTIME_PM_OPS(wm8994_suspend, wm8994_resume, NULL) 795}; 796 797static struct i2c_driver wm8994_i2c_driver = { 798 .driver = { 799 .name = "wm8994", 800 .owner = THIS_MODULE, 801 .pm = &wm8994_pm_ops, 802 .of_match_table = of_match_ptr(wm8994_of_match), 803 }, 804 .probe = wm8994_i2c_probe, 805 .remove = wm8994_i2c_remove, 806 .id_table = wm8994_i2c_id, 807}; 808 809module_i2c_driver(wm8994_i2c_driver); 810 811MODULE_DESCRIPTION("Core support for the WM8994 audio CODEC"); 812MODULE_LICENSE("GPL"); 813MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); 814