drivers/mfd/intel_soc_pmic_bxtwc.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * MFD core driver for Intel Broxton Whiskey Cove PMIC
   4  *
   5  * Copyright (C) 2015 Intel Corporation. All rights reserved.
   6  */
   7
   8 #include <linux/acpi.h>
   9 #include <linux/delay.h>
  10 #include <linux/err.h>
  11 #include <linux/interrupt.h>
  12 #include <linux/kernel.h>
  13 #include <linux/mfd/core.h>
  14 #include <linux/mfd/intel_soc_pmic.h>
  15 #include <linux/mfd/intel_soc_pmic_bxtwc.h>
  16 #include <linux/module.h>
  17
  18 #include <asm/intel_pmc_ipc.h>
  19
  20 /* PMIC device registers */
  21 #define REG_ADDR_MASK           0xFF00
  22 #define REG_ADDR_SHIFT          8
  23 #define REG_OFFSET_MASK         0xFF
  24
  25 /* Interrupt Status Registers */
  26 #define BXTWC_IRQLVL1           0x4E02
  27
  28 #define BXTWC_PWRBTNIRQ         0x4E03
  29 #define BXTWC_THRM0IRQ          0x4E04
  30 #define BXTWC_THRM1IRQ          0x4E05
  31 #define BXTWC_THRM2IRQ          0x4E06
  32 #define BXTWC_BCUIRQ            0x4E07
  33 #define BXTWC_ADCIRQ            0x4E08
  34 #define BXTWC_CHGR0IRQ          0x4E09
  35 #define BXTWC_CHGR1IRQ          0x4E0A
  36 #define BXTWC_GPIOIRQ0          0x4E0B
  37 #define BXTWC_GPIOIRQ1          0x4E0C
  38 #define BXTWC_CRITIRQ           0x4E0D
  39 #define BXTWC_TMUIRQ            0x4FB6
  40
  41 /* Interrupt MASK Registers */
  42 #define BXTWC_MIRQLVL1          0x4E0E
  43 #define BXTWC_MIRQLVL1_MCHGR    BIT(5)
  44
  45 #define BXTWC_MPWRBTNIRQ        0x4E0F
  46 #define BXTWC_MTHRM0IRQ         0x4E12
  47 #define BXTWC_MTHRM1IRQ         0x4E13
  48 #define BXTWC_MTHRM2IRQ         0x4E14
  49 #define BXTWC_MBCUIRQ           0x4E15
  50 #define BXTWC_MADCIRQ           0x4E16
  51 #define BXTWC_MCHGR0IRQ         0x4E17
  52 #define BXTWC_MCHGR1IRQ         0x4E18
  53 #define BXTWC_MGPIO0IRQ         0x4E19
  54 #define BXTWC_MGPIO1IRQ         0x4E1A
  55 #define BXTWC_MCRITIRQ          0x4E1B
  56 #define BXTWC_MTMUIRQ           0x4FB7
  57
  58 /* Whiskey Cove PMIC share same ACPI ID between different platforms */
  59 #define BROXTON_PMIC_WC_HRV     4
  60
  61 enum bxtwc_irqs {
  62         BXTWC_PWRBTN_LVL1_IRQ = 0,
  63         BXTWC_TMU_LVL1_IRQ,
  64         BXTWC_THRM_LVL1_IRQ,
  65         BXTWC_BCU_LVL1_IRQ,
  66         BXTWC_ADC_LVL1_IRQ,
  67         BXTWC_CHGR_LVL1_IRQ,
  68         BXTWC_GPIO_LVL1_IRQ,
  69         BXTWC_CRIT_LVL1_IRQ,
  70 };
  71
  72 enum bxtwc_irqs_pwrbtn {
  73         BXTWC_PWRBTN_IRQ = 0,
  74         BXTWC_UIBTN_IRQ,
  75 };
  76
  77 enum bxtwc_irqs_bcu {
  78         BXTWC_BCU_IRQ = 0,
  79 };
  80
  81 enum bxtwc_irqs_adc {
  82         BXTWC_ADC_IRQ = 0,
  83 };
  84
  85 enum bxtwc_irqs_chgr {
  86         BXTWC_USBC_IRQ = 0,
  87         BXTWC_CHGR0_IRQ,
  88         BXTWC_CHGR1_IRQ,
  89 };
  90
  91 enum bxtwc_irqs_tmu {
  92         BXTWC_TMU_IRQ = 0,
  93 };
  94
  95 enum bxtwc_irqs_crit {
  96         BXTWC_CRIT_IRQ = 0,
  97 };
  98
  99 static const struct regmap_irq bxtwc_regmap_irqs[] = {
 100         REGMAP_IRQ_REG(BXTWC_PWRBTN_LVL1_IRQ, 0, BIT(0)),
 101         REGMAP_IRQ_REG(BXTWC_TMU_LVL1_IRQ, 0, BIT(1)),
 102         REGMAP_IRQ_REG(BXTWC_THRM_LVL1_IRQ, 0, BIT(2)),
 103         REGMAP_IRQ_REG(BXTWC_BCU_LVL1_IRQ, 0, BIT(3)),
 104         REGMAP_IRQ_REG(BXTWC_ADC_LVL1_IRQ, 0, BIT(4)),
 105         REGMAP_IRQ_REG(BXTWC_CHGR_LVL1_IRQ, 0, BIT(5)),
 106         REGMAP_IRQ_REG(BXTWC_GPIO_LVL1_IRQ, 0, BIT(6)),
 107         REGMAP_IRQ_REG(BXTWC_CRIT_LVL1_IRQ, 0, BIT(7)),
 108 };
 109
 110 static const struct regmap_irq bxtwc_regmap_irqs_pwrbtn[] = {
 111         REGMAP_IRQ_REG(BXTWC_PWRBTN_IRQ, 0, 0x01),
 112 };
 113
 114 static const struct regmap_irq bxtwc_regmap_irqs_bcu[] = {
 115         REGMAP_IRQ_REG(BXTWC_BCU_IRQ, 0, 0x1f),
 116 };
 117
 118 static const struct regmap_irq bxtwc_regmap_irqs_adc[] = {
 119         REGMAP_IRQ_REG(BXTWC_ADC_IRQ, 0, 0xff),
 120 };
 121
 122 static const struct regmap_irq bxtwc_regmap_irqs_chgr[] = {
 123         REGMAP_IRQ_REG(BXTWC_USBC_IRQ, 0, 0x20),
 124         REGMAP_IRQ_REG(BXTWC_CHGR0_IRQ, 0, 0x1f),
 125         REGMAP_IRQ_REG(BXTWC_CHGR1_IRQ, 1, 0x1f),
 126 };
 127
 128 static const struct regmap_irq bxtwc_regmap_irqs_tmu[] = {
 129         REGMAP_IRQ_REG(BXTWC_TMU_IRQ, 0, 0x06),
 130 };
 131
 132 static const struct regmap_irq bxtwc_regmap_irqs_crit[] = {
 133         REGMAP_IRQ_REG(BXTWC_CRIT_IRQ, 0, 0x03),
 134 };
 135
 136 static struct regmap_irq_chip bxtwc_regmap_irq_chip = {
 137         .name = "bxtwc_irq_chip",
 138         .status_base = BXTWC_IRQLVL1,
 139         .mask_base = BXTWC_MIRQLVL1,
 140         .irqs = bxtwc_regmap_irqs,
 141         .num_irqs = ARRAY_SIZE(bxtwc_regmap_irqs),
 142         .num_regs = 1,
 143 };
 144
 145 static struct regmap_irq_chip bxtwc_regmap_irq_chip_pwrbtn = {
 146         .name = "bxtwc_irq_chip_pwrbtn",
 147         .status_base = BXTWC_PWRBTNIRQ,
 148         .mask_base = BXTWC_MPWRBTNIRQ,
 149         .irqs = bxtwc_regmap_irqs_pwrbtn,
 150         .num_irqs = ARRAY_SIZE(bxtwc_regmap_irqs_pwrbtn),
 151         .num_regs = 1,
 152 };
 153
 154 static struct regmap_irq_chip bxtwc_regmap_irq_chip_tmu = {
 155         .name = "bxtwc_irq_chip_tmu",
 156         .status_base = BXTWC_TMUIRQ,
 157         .mask_base = BXTWC_MTMUIRQ,
 158         .irqs = bxtwc_regmap_irqs_tmu,
 159         .num_irqs = ARRAY_SIZE(bxtwc_regmap_irqs_tmu),
 160         .num_regs = 1,
 161 };
 162
 163 static struct regmap_irq_chip bxtwc_regmap_irq_chip_bcu = {
 164         .name = "bxtwc_irq_chip_bcu",
 165         .status_base = BXTWC_BCUIRQ,
 166         .mask_base = BXTWC_MBCUIRQ,
 167         .irqs = bxtwc_regmap_irqs_bcu,
 168         .num_irqs = ARRAY_SIZE(bxtwc_regmap_irqs_bcu),
 169         .num_regs = 1,
 170 };
 171
 172 static struct regmap_irq_chip bxtwc_regmap_irq_chip_adc = {
 173         .name = "bxtwc_irq_chip_adc",
 174         .status_base = BXTWC_ADCIRQ,
 175         .mask_base = BXTWC_MADCIRQ,
 176         .irqs = bxtwc_regmap_irqs_adc,
 177         .num_irqs = ARRAY_SIZE(bxtwc_regmap_irqs_adc),
 178         .num_regs = 1,
 179 };
 180
 181 static struct regmap_irq_chip bxtwc_regmap_irq_chip_chgr = {
 182         .name = "bxtwc_irq_chip_chgr",
 183         .status_base = BXTWC_CHGR0IRQ,
 184         .mask_base = BXTWC_MCHGR0IRQ,
 185         .irqs = bxtwc_regmap_irqs_chgr,
 186         .num_irqs = ARRAY_SIZE(bxtwc_regmap_irqs_chgr),
 187         .num_regs = 2,
 188 };
 189
 190 static struct regmap_irq_chip bxtwc_regmap_irq_chip_crit = {
 191         .name = "bxtwc_irq_chip_crit",
 192         .status_base = BXTWC_CRITIRQ,
 193         .mask_base = BXTWC_MCRITIRQ,
 194         .irqs = bxtwc_regmap_irqs_crit,
 195         .num_irqs = ARRAY_SIZE(bxtwc_regmap_irqs_crit),
 196         .num_regs = 1,
 197 };
 198
 199 static struct resource gpio_resources[] = {
 200         DEFINE_RES_IRQ_NAMED(BXTWC_GPIO_LVL1_IRQ, "GPIO"),
 201 };
 202
 203 static struct resource adc_resources[] = {
 204         DEFINE_RES_IRQ_NAMED(BXTWC_ADC_IRQ, "ADC"),
 205 };
 206
 207 static struct resource usbc_resources[] = {
 208         DEFINE_RES_IRQ(BXTWC_USBC_IRQ),
 209 };
 210
 211 static struct resource charger_resources[] = {
 212         DEFINE_RES_IRQ_NAMED(BXTWC_CHGR0_IRQ, "CHARGER"),
 213         DEFINE_RES_IRQ_NAMED(BXTWC_CHGR1_IRQ, "CHARGER1"),
 214 };
 215
 216 static struct resource thermal_resources[] = {
 217         DEFINE_RES_IRQ(BXTWC_THRM_LVL1_IRQ),
 218 };
 219
 220 static struct resource bcu_resources[] = {
 221         DEFINE_RES_IRQ_NAMED(BXTWC_BCU_IRQ, "BCU"),
 222 };
 223
 224 static struct resource tmu_resources[] = {
 225         DEFINE_RES_IRQ_NAMED(BXTWC_TMU_IRQ, "TMU"),
 226 };
 227
 228 static struct mfd_cell bxt_wc_dev[] = {
 229         {
 230                 .name = "bxt_wcove_gpadc",
 231                 .num_resources = ARRAY_SIZE(adc_resources),
 232                 .resources = adc_resources,
 233         },
 234         {
 235                 .name = "bxt_wcove_thermal",
 236                 .num_resources = ARRAY_SIZE(thermal_resources),
 237                 .resources = thermal_resources,
 238         },
 239         {
 240                 .name = "bxt_wcove_usbc",
 241                 .num_resources = ARRAY_SIZE(usbc_resources),
 242                 .resources = usbc_resources,
 243         },
 244         {
 245                 .name = "bxt_wcove_ext_charger",
 246                 .num_resources = ARRAY_SIZE(charger_resources),
 247                 .resources = charger_resources,
 248         },
 249         {
 250                 .name = "bxt_wcove_bcu",
 251                 .num_resources = ARRAY_SIZE(bcu_resources),
 252                 .resources = bcu_resources,
 253         },
 254         {
 255                 .name = "bxt_wcove_tmu",
 256                 .num_resources = ARRAY_SIZE(tmu_resources),
 257                 .resources = tmu_resources,
 258         },
 259
 260         {
 261                 .name = "bxt_wcove_gpio",
 262                 .num_resources = ARRAY_SIZE(gpio_resources),
 263                 .resources = gpio_resources,
 264         },
 265         {
 266                 .name = "bxt_wcove_region",
 267         },
 268 };
 269
 270 static int regmap_ipc_byte_reg_read(void *context, unsigned int reg,
 271                                     unsigned int *val)
 272 {
 273         int ret;
 274         int i2c_addr;
 275         u8 ipc_in[2];
 276         u8 ipc_out[4];
 277         struct intel_soc_pmic *pmic = context;
 278
 279         if (!pmic)
 280                 return -EINVAL;
 281
 282         if (reg & REG_ADDR_MASK)
 283                 i2c_addr = (reg & REG_ADDR_MASK) >> REG_ADDR_SHIFT;
 284         else
 285                 i2c_addr = BXTWC_DEVICE1_ADDR;
 286
 287         reg &= REG_OFFSET_MASK;
 288
 289         ipc_in[0] = reg;
 290         ipc_in[1] = i2c_addr;
 291         ret = intel_pmc_ipc_command(PMC_IPC_PMIC_ACCESS,
 292                         PMC_IPC_PMIC_ACCESS_READ,
 293                         ipc_in, sizeof(ipc_in), (u32 *)ipc_out, 1);
 294         if (ret) {
 295                 dev_err(pmic->dev, "Failed to read from PMIC\n");
 296                 return ret;
 297         }
 298         *val = ipc_out[0];
 299
 300         return 0;
 301 }
 302
 303 static int regmap_ipc_byte_reg_write(void *context, unsigned int reg,
 304                                        unsigned int val)
 305 {
 306         int ret;
 307         int i2c_addr;
 308         u8 ipc_in[3];
 309         struct intel_soc_pmic *pmic = context;
 310
 311         if (!pmic)
 312                 return -EINVAL;
 313
 314         if (reg & REG_ADDR_MASK)
 315                 i2c_addr = (reg & REG_ADDR_MASK) >> REG_ADDR_SHIFT;
 316         else
 317                 i2c_addr = BXTWC_DEVICE1_ADDR;
 318
 319         reg &= REG_OFFSET_MASK;
 320
 321         ipc_in[0] = reg;
 322         ipc_in[1] = i2c_addr;
 323         ipc_in[2] = val;
 324         ret = intel_pmc_ipc_command(PMC_IPC_PMIC_ACCESS,
 325                         PMC_IPC_PMIC_ACCESS_WRITE,
 326                         ipc_in, sizeof(ipc_in), NULL, 0);
 327         if (ret) {
 328                 dev_err(pmic->dev, "Failed to write to PMIC\n");
 329                 return ret;
 330         }
 331
 332         return 0;
 333 }
 334
 335 /* sysfs interfaces to r/w PMIC registers, required by initial script */
 336 static unsigned long bxtwc_reg_addr;
 337 static ssize_t bxtwc_reg_show(struct device *dev,
 338                 struct device_attribute *attr, char *buf)
 339 {
 340         return sprintf(buf, "0x%lx\n", bxtwc_reg_addr);
 341 }
 342
 343 static ssize_t bxtwc_reg_store(struct device *dev,
 344         struct device_attribute *attr, const char *buf, size_t count)
 345 {
 346         if (kstrtoul(buf, 0, &bxtwc_reg_addr)) {
 347                 dev_err(dev, "Invalid register address\n");
 348                 return -EINVAL;
 349         }
 350         return (ssize_t)count;
 351 }
 352
 353 static ssize_t bxtwc_val_show(struct device *dev,
 354                 struct device_attribute *attr, char *buf)
 355 {
 356         int ret;
 357         unsigned int val;
 358         struct intel_soc_pmic *pmic = dev_get_drvdata(dev);
 359
 360         ret = regmap_read(pmic->regmap, bxtwc_reg_addr, &val);
 361         if (ret < 0) {
 362                 dev_err(dev, "Failed to read 0x%lx\n", bxtwc_reg_addr);
 363                 return -EIO;
 364         }
 365
 366         return sprintf(buf, "0x%02x\n", val);
 367 }
 368
 369 static ssize_t bxtwc_val_store(struct device *dev,
 370         struct device_attribute *attr, const char *buf, size_t count)
 371 {
 372         int ret;
 373         unsigned int val;
 374         struct intel_soc_pmic *pmic = dev_get_drvdata(dev);
 375
 376         ret = kstrtouint(buf, 0, &val);
 377         if (ret)
 378                 return ret;
 379
 380         ret = regmap_write(pmic->regmap, bxtwc_reg_addr, val);
 381         if (ret) {
 382                 dev_err(dev, "Failed to write value 0x%02x to address 0x%lx",
 383                         val, bxtwc_reg_addr);
 384                 return -EIO;
 385         }
 386         return count;
 387 }
 388
 389 static DEVICE_ATTR(addr, S_IWUSR | S_IRUSR, bxtwc_reg_show, bxtwc_reg_store);
 390 static DEVICE_ATTR(val, S_IWUSR | S_IRUSR, bxtwc_val_show, bxtwc_val_store);
 391 static struct attribute *bxtwc_attrs[] = {
 392         &dev_attr_addr.attr,
 393         &dev_attr_val.attr,
 394         NULL
 395 };
 396
 397 static const struct attribute_group bxtwc_group = {
 398         .attrs = bxtwc_attrs,
 399 };
 400
 401 static const struct regmap_config bxtwc_regmap_config = {
 402         .reg_bits = 16,
 403         .val_bits = 8,
 404         .reg_write = regmap_ipc_byte_reg_write,
 405         .reg_read = regmap_ipc_byte_reg_read,
 406 };
 407
 408 static int bxtwc_add_chained_irq_chip(struct intel_soc_pmic *pmic,
 409                                 struct regmap_irq_chip_data *pdata,
 410                                 int pirq, int irq_flags,
 411                                 const struct regmap_irq_chip *chip,
 412                                 struct regmap_irq_chip_data **data)
 413 {
 414         int irq;
 415
 416         irq = regmap_irq_get_virq(pdata, pirq);
 417         if (irq < 0) {
 418                 dev_err(pmic->dev,
 419                         "Failed to get parent vIRQ(%d) for chip %s, ret:%d\n",
 420                         pirq, chip->name, irq);
 421                 return irq;
 422         }
 423
 424         return devm_regmap_add_irq_chip(pmic->dev, pmic->regmap, irq, irq_flags,
 425                                         0, chip, data);
 426 }
 427
 428 static int bxtwc_probe(struct platform_device *pdev)
 429 {
 430         int ret;
 431         acpi_handle handle;
 432         acpi_status status;
 433         unsigned long long hrv;
 434         struct intel_soc_pmic *pmic;
 435
 436         handle = ACPI_HANDLE(&pdev->dev);
 437         status = acpi_evaluate_integer(handle, "_HRV", NULL, &hrv);
 438         if (ACPI_FAILURE(status)) {
 439                 dev_err(&pdev->dev, "Failed to get PMIC hardware revision\n");
 440                 return -ENODEV;
 441         }
 442         if (hrv != BROXTON_PMIC_WC_HRV) {
 443                 dev_err(&pdev->dev, "Invalid PMIC hardware revision: %llu\n",
 444                         hrv);
 445                 return -ENODEV;
 446         }
 447
 448         pmic = devm_kzalloc(&pdev->dev, sizeof(*pmic), GFP_KERNEL);
 449         if (!pmic)
 450                 return -ENOMEM;
 451
 452         ret = platform_get_irq(pdev, 0);
 453         if (ret < 0) {
 454                 dev_err(&pdev->dev, "Invalid IRQ\n");
 455                 return ret;
 456         }
 457         pmic->irq = ret;
 458
 459         dev_set_drvdata(&pdev->dev, pmic);
 460         pmic->dev = &pdev->dev;
 461
 462         pmic->regmap = devm_regmap_init(&pdev->dev, NULL, pmic,
 463                                         &bxtwc_regmap_config);
 464         if (IS_ERR(pmic->regmap)) {
 465                 ret = PTR_ERR(pmic->regmap);
 466                 dev_err(&pdev->dev, "Failed to initialise regmap: %d\n", ret);
 467                 return ret;
 468         }
 469
 470         ret = devm_regmap_add_irq_chip(&pdev->dev, pmic->regmap, pmic->irq,
 471                                        IRQF_ONESHOT | IRQF_SHARED,
 472                                        0, &bxtwc_regmap_irq_chip,
 473                                        &pmic->irq_chip_data);
 474         if (ret) {
 475                 dev_err(&pdev->dev, "Failed to add IRQ chip\n");
 476                 return ret;
 477         }
 478
 479         ret = bxtwc_add_chained_irq_chip(pmic, pmic->irq_chip_data,
 480                                          BXTWC_PWRBTN_LVL1_IRQ,
 481                                          IRQF_ONESHOT,
 482                                          &bxtwc_regmap_irq_chip_pwrbtn,
 483                                          &pmic->irq_chip_data_pwrbtn);
 484         if (ret) {
 485                 dev_err(&pdev->dev, "Failed to add PWRBTN IRQ chip\n");
 486                 return ret;
 487         }
 488
 489         ret = bxtwc_add_chained_irq_chip(pmic, pmic->irq_chip_data,
 490                                          BXTWC_TMU_LVL1_IRQ,
 491                                          IRQF_ONESHOT,
 492                                          &bxtwc_regmap_irq_chip_tmu,
 493                                          &pmic->irq_chip_data_tmu);
 494         if (ret) {
 495                 dev_err(&pdev->dev, "Failed to add TMU IRQ chip\n");
 496                 return ret;
 497         }
 498
 499         /* Add chained IRQ handler for BCU IRQs */
 500         ret = bxtwc_add_chained_irq_chip(pmic, pmic->irq_chip_data,
 501                                          BXTWC_BCU_LVL1_IRQ,
 502                                          IRQF_ONESHOT,
 503                                          &bxtwc_regmap_irq_chip_bcu,
 504                                          &pmic->irq_chip_data_bcu);
 505
 506
 507         if (ret) {
 508                 dev_err(&pdev->dev, "Failed to add BUC IRQ chip\n");
 509                 return ret;
 510         }
 511
 512         /* Add chained IRQ handler for ADC IRQs */
 513         ret = bxtwc_add_chained_irq_chip(pmic, pmic->irq_chip_data,
 514                                          BXTWC_ADC_LVL1_IRQ,
 515                                          IRQF_ONESHOT,
 516                                          &bxtwc_regmap_irq_chip_adc,
 517                                          &pmic->irq_chip_data_adc);
 518
 519
 520         if (ret) {
 521                 dev_err(&pdev->dev, "Failed to add ADC IRQ chip\n");
 522                 return ret;
 523         }
 524
 525         /* Add chained IRQ handler for CHGR IRQs */
 526         ret = bxtwc_add_chained_irq_chip(pmic, pmic->irq_chip_data,
 527                                          BXTWC_CHGR_LVL1_IRQ,
 528                                          IRQF_ONESHOT,
 529                                          &bxtwc_regmap_irq_chip_chgr,
 530                                          &pmic->irq_chip_data_chgr);
 531
 532
 533         if (ret) {
 534                 dev_err(&pdev->dev, "Failed to add CHGR IRQ chip\n");
 535                 return ret;
 536         }
 537
 538         /* Add chained IRQ handler for CRIT IRQs */
 539         ret = bxtwc_add_chained_irq_chip(pmic, pmic->irq_chip_data,
 540                                          BXTWC_CRIT_LVL1_IRQ,
 541                                          IRQF_ONESHOT,
 542                                          &bxtwc_regmap_irq_chip_crit,
 543                                          &pmic->irq_chip_data_crit);
 544
 545
 546         if (ret) {
 547                 dev_err(&pdev->dev, "Failed to add CRIT IRQ chip\n");
 548                 return ret;
 549         }
 550
 551         ret = devm_mfd_add_devices(&pdev->dev, PLATFORM_DEVID_NONE, bxt_wc_dev,
 552                                    ARRAY_SIZE(bxt_wc_dev), NULL, 0, NULL);
 553         if (ret) {
 554                 dev_err(&pdev->dev, "Failed to add devices\n");
 555                 return ret;
 556         }
 557
 558         ret = sysfs_create_group(&pdev->dev.kobj, &bxtwc_group);
 559         if (ret) {
 560                 dev_err(&pdev->dev, "Failed to create sysfs group %d\n", ret);
 561                 return ret;
 562         }
 563
 564         /*
 565          * There is known hw bug. Upon reset BIT 5 of register
 566          * BXTWC_CHGR_LVL1_IRQ is 0 which is the expected value. However,
 567          * later it's set to 1(masked) automatically by hardware. So we
 568          * have the software workaround here to unmaksed it in order to let
 569          * charger interrutp work.
 570          */
 571         regmap_update_bits(pmic->regmap, BXTWC_MIRQLVL1,
 572                                 BXTWC_MIRQLVL1_MCHGR, 0);
 573
 574         return 0;
 575 }
 576
 577 static int bxtwc_remove(struct platform_device *pdev)
 578 {
 579         sysfs_remove_group(&pdev->dev.kobj, &bxtwc_group);
 580
 581         return 0;
 582 }
 583
 584 static void bxtwc_shutdown(struct platform_device *pdev)
 585 {
 586         struct intel_soc_pmic *pmic = dev_get_drvdata(&pdev->dev);
 587
 588         disable_irq(pmic->irq);
 589 }
 590
 591 #ifdef CONFIG_PM_SLEEP
 592 static int bxtwc_suspend(struct device *dev)
 593 {
 594         struct intel_soc_pmic *pmic = dev_get_drvdata(dev);
 595
 596         disable_irq(pmic->irq);
 597
 598         return 0;
 599 }
 600
 601 static int bxtwc_resume(struct device *dev)
 602 {
 603         struct intel_soc_pmic *pmic = dev_get_drvdata(dev);
 604
 605         enable_irq(pmic->irq);
 606         return 0;
 607 }
 608 #endif
 609 static SIMPLE_DEV_PM_OPS(bxtwc_pm_ops, bxtwc_suspend, bxtwc_resume);
 610
 611 static const struct acpi_device_id bxtwc_acpi_ids[] = {
 612         { "INT34D3", },
 613         { }
 614 };
 615 MODULE_DEVICE_TABLE(acpi, bxtwc_acpi_ids);
 616
 617 static struct platform_driver bxtwc_driver = {
 618         .probe = bxtwc_probe,
 619         .remove = bxtwc_remove,
 620         .shutdown = bxtwc_shutdown,
 621         .driver = {
 622                 .name   = "BXTWC PMIC",
 623                 .pm     = &bxtwc_pm_ops,
 624                 .acpi_match_table = ACPI_PTR(bxtwc_acpi_ids),
 625         },
 626 };
 627
 628 module_platform_driver(bxtwc_driver);
 629
 630 MODULE_LICENSE("GPL v2");
 631 MODULE_AUTHOR("Qipeng Zha<qipeng.zha@intel.com>");