linux/drivers/mfd/wm8994-core.c
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   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
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