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_scu_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 #define PMC_PMIC_ACCESS         0xFF
  62 #define PMC_PMIC_READ           0x0
  63 #define PMC_PMIC_WRITE          0x1
  64
  65 enum bxtwc_irqs {
  66         BXTWC_PWRBTN_LVL1_IRQ = 0,
  67         BXTWC_TMU_LVL1_IRQ,
  68         BXTWC_THRM_LVL1_IRQ,
  69         BXTWC_BCU_LVL1_IRQ,
  70         BXTWC_ADC_LVL1_IRQ,
  71         BXTWC_CHGR_LVL1_IRQ,
  72         BXTWC_GPIO_LVL1_IRQ,
  73         BXTWC_CRIT_LVL1_IRQ,
  74 };
  75
  76 enum bxtwc_irqs_pwrbtn {
  77         BXTWC_PWRBTN_IRQ = 0,
  78         BXTWC_UIBTN_IRQ,
  79 };
  80
  81 enum bxtwc_irqs_bcu {
  82         BXTWC_BCU_IRQ = 0,
  83 };
  84
  85 enum bxtwc_irqs_adc {
  86         BXTWC_ADC_IRQ = 0,
  87 };
  88
  89 enum bxtwc_irqs_chgr {
  90         BXTWC_USBC_IRQ = 0,
  91         BXTWC_CHGR0_IRQ,
  92         BXTWC_CHGR1_IRQ,
  93 };
  94
  95 enum bxtwc_irqs_tmu {
  96         BXTWC_TMU_IRQ = 0,
  97 };
  98
  99 enum bxtwc_irqs_crit {
 100         BXTWC_CRIT_IRQ = 0,
 101 };
 102
 103 static const struct regmap_irq bxtwc_regmap_irqs[] = {
 104         REGMAP_IRQ_REG(BXTWC_PWRBTN_LVL1_IRQ, 0, BIT(0)),
 105         REGMAP_IRQ_REG(BXTWC_TMU_LVL1_IRQ, 0, BIT(1)),
 106         REGMAP_IRQ_REG(BXTWC_THRM_LVL1_IRQ, 0, BIT(2)),
 107         REGMAP_IRQ_REG(BXTWC_BCU_LVL1_IRQ, 0, BIT(3)),
 108         REGMAP_IRQ_REG(BXTWC_ADC_LVL1_IRQ, 0, BIT(4)),
 109         REGMAP_IRQ_REG(BXTWC_CHGR_LVL1_IRQ, 0, BIT(5)),
 110         REGMAP_IRQ_REG(BXTWC_GPIO_LVL1_IRQ, 0, BIT(6)),
 111         REGMAP_IRQ_REG(BXTWC_CRIT_LVL1_IRQ, 0, BIT(7)),
 112 };
 113
 114 static const struct regmap_irq bxtwc_regmap_irqs_pwrbtn[] = {
 115         REGMAP_IRQ_REG(BXTWC_PWRBTN_IRQ, 0, 0x01),
 116 };
 117
 118 static const struct regmap_irq bxtwc_regmap_irqs_bcu[] = {
 119         REGMAP_IRQ_REG(BXTWC_BCU_IRQ, 0, 0x1f),
 120 };
 121
 122 static const struct regmap_irq bxtwc_regmap_irqs_adc[] = {
 123         REGMAP_IRQ_REG(BXTWC_ADC_IRQ, 0, 0xff),
 124 };
 125
 126 static const struct regmap_irq bxtwc_regmap_irqs_chgr[] = {
 127         REGMAP_IRQ_REG(BXTWC_USBC_IRQ, 0, 0x20),
 128         REGMAP_IRQ_REG(BXTWC_CHGR0_IRQ, 0, 0x1f),
 129         REGMAP_IRQ_REG(BXTWC_CHGR1_IRQ, 1, 0x1f),
 130 };
 131
 132 static const struct regmap_irq bxtwc_regmap_irqs_tmu[] = {
 133         REGMAP_IRQ_REG(BXTWC_TMU_IRQ, 0, 0x06),
 134 };
 135
 136 static const struct regmap_irq bxtwc_regmap_irqs_crit[] = {
 137         REGMAP_IRQ_REG(BXTWC_CRIT_IRQ, 0, 0x03),
 138 };
 139
 140 static struct regmap_irq_chip bxtwc_regmap_irq_chip = {
 141         .name = "bxtwc_irq_chip",
 142         .status_base = BXTWC_IRQLVL1,
 143         .mask_base = BXTWC_MIRQLVL1,
 144         .irqs = bxtwc_regmap_irqs,
 145         .num_irqs = ARRAY_SIZE(bxtwc_regmap_irqs),
 146         .num_regs = 1,
 147 };
 148
 149 static struct regmap_irq_chip bxtwc_regmap_irq_chip_pwrbtn = {
 150         .name = "bxtwc_irq_chip_pwrbtn",
 151         .status_base = BXTWC_PWRBTNIRQ,
 152         .mask_base = BXTWC_MPWRBTNIRQ,
 153         .irqs = bxtwc_regmap_irqs_pwrbtn,
 154         .num_irqs = ARRAY_SIZE(bxtwc_regmap_irqs_pwrbtn),
 155         .num_regs = 1,
 156 };
 157
 158 static struct regmap_irq_chip bxtwc_regmap_irq_chip_tmu = {
 159         .name = "bxtwc_irq_chip_tmu",
 160         .status_base = BXTWC_TMUIRQ,
 161         .mask_base = BXTWC_MTMUIRQ,
 162         .irqs = bxtwc_regmap_irqs_tmu,
 163         .num_irqs = ARRAY_SIZE(bxtwc_regmap_irqs_tmu),
 164         .num_regs = 1,
 165 };
 166
 167 static struct regmap_irq_chip bxtwc_regmap_irq_chip_bcu = {
 168         .name = "bxtwc_irq_chip_bcu",
 169         .status_base = BXTWC_BCUIRQ,
 170         .mask_base = BXTWC_MBCUIRQ,
 171         .irqs = bxtwc_regmap_irqs_bcu,
 172         .num_irqs = ARRAY_SIZE(bxtwc_regmap_irqs_bcu),
 173         .num_regs = 1,
 174 };
 175
 176 static struct regmap_irq_chip bxtwc_regmap_irq_chip_adc = {
 177         .name = "bxtwc_irq_chip_adc",
 178         .status_base = BXTWC_ADCIRQ,
 179         .mask_base = BXTWC_MADCIRQ,
 180         .irqs = bxtwc_regmap_irqs_adc,
 181         .num_irqs = ARRAY_SIZE(bxtwc_regmap_irqs_adc),
 182         .num_regs = 1,
 183 };
 184
 185 static struct regmap_irq_chip bxtwc_regmap_irq_chip_chgr = {
 186         .name = "bxtwc_irq_chip_chgr",
 187         .status_base = BXTWC_CHGR0IRQ,
 188         .mask_base = BXTWC_MCHGR0IRQ,
 189         .irqs = bxtwc_regmap_irqs_chgr,
 190         .num_irqs = ARRAY_SIZE(bxtwc_regmap_irqs_chgr),
 191         .num_regs = 2,
 192 };
 193
 194 static struct regmap_irq_chip bxtwc_regmap_irq_chip_crit = {
 195         .name = "bxtwc_irq_chip_crit",
 196         .status_base = BXTWC_CRITIRQ,
 197         .mask_base = BXTWC_MCRITIRQ,
 198         .irqs = bxtwc_regmap_irqs_crit,
 199         .num_irqs = ARRAY_SIZE(bxtwc_regmap_irqs_crit),
 200         .num_regs = 1,
 201 };
 202
 203 static const struct resource gpio_resources[] = {
 204         DEFINE_RES_IRQ_NAMED(BXTWC_GPIO_LVL1_IRQ, "GPIO"),
 205 };
 206
 207 static const struct resource adc_resources[] = {
 208         DEFINE_RES_IRQ_NAMED(BXTWC_ADC_IRQ, "ADC"),
 209 };
 210
 211 static const struct resource usbc_resources[] = {
 212         DEFINE_RES_IRQ(BXTWC_USBC_IRQ),
 213 };
 214
 215 static const struct resource charger_resources[] = {
 216         DEFINE_RES_IRQ_NAMED(BXTWC_CHGR0_IRQ, "CHARGER"),
 217         DEFINE_RES_IRQ_NAMED(BXTWC_CHGR1_IRQ, "CHARGER1"),
 218 };
 219
 220 static const struct resource thermal_resources[] = {
 221         DEFINE_RES_IRQ(BXTWC_THRM_LVL1_IRQ),
 222 };
 223
 224 static const struct resource bcu_resources[] = {
 225         DEFINE_RES_IRQ_NAMED(BXTWC_BCU_IRQ, "BCU"),
 226 };
 227
 228 static const struct resource tmu_resources[] = {
 229         DEFINE_RES_IRQ_NAMED(BXTWC_TMU_IRQ, "TMU"),
 230 };
 231
 232 static struct mfd_cell bxt_wc_dev[] = {
 233         {
 234                 .name = "bxt_wcove_gpadc",
 235                 .num_resources = ARRAY_SIZE(adc_resources),
 236                 .resources = adc_resources,
 237         },
 238         {
 239                 .name = "bxt_wcove_thermal",
 240                 .num_resources = ARRAY_SIZE(thermal_resources),
 241                 .resources = thermal_resources,
 242         },
 243         {
 244                 .name = "bxt_wcove_usbc",
 245                 .num_resources = ARRAY_SIZE(usbc_resources),
 246                 .resources = usbc_resources,
 247         },
 248         {
 249                 .name = "bxt_wcove_ext_charger",
 250                 .num_resources = ARRAY_SIZE(charger_resources),
 251                 .resources = charger_resources,
 252         },
 253         {
 254                 .name = "bxt_wcove_bcu",
 255                 .num_resources = ARRAY_SIZE(bcu_resources),
 256                 .resources = bcu_resources,
 257         },
 258         {
 259                 .name = "bxt_wcove_tmu",
 260                 .num_resources = ARRAY_SIZE(tmu_resources),
 261                 .resources = tmu_resources,
 262         },
 263
 264         {
 265                 .name = "bxt_wcove_gpio",
 266                 .num_resources = ARRAY_SIZE(gpio_resources),
 267                 .resources = gpio_resources,
 268         },
 269         {
 270                 .name = "bxt_wcove_region",
 271         },
 272 };
 273
 274 static int regmap_ipc_byte_reg_read(void *context, unsigned int reg,
 275                                     unsigned int *val)
 276 {
 277         int ret;
 278         int i2c_addr;
 279         u8 ipc_in[2];
 280         u8 ipc_out[4];
 281         struct intel_soc_pmic *pmic = context;
 282
 283         if (!pmic)
 284                 return -EINVAL;
 285
 286         if (reg & REG_ADDR_MASK)
 287                 i2c_addr = (reg & REG_ADDR_MASK) >> REG_ADDR_SHIFT;
 288         else
 289                 i2c_addr = BXTWC_DEVICE1_ADDR;
 290
 291         reg &= REG_OFFSET_MASK;
 292
 293         ipc_in[0] = reg;
 294         ipc_in[1] = i2c_addr;
 295         ret = intel_scu_ipc_dev_command(pmic->scu, PMC_PMIC_ACCESS,
 296                                         PMC_PMIC_READ, ipc_in, sizeof(ipc_in),
 297                                         ipc_out, sizeof(ipc_out));
 298         if (ret)
 299                 return ret;
 300
 301         *val = ipc_out[0];
 302
 303         return 0;
 304 }
 305
 306 static int regmap_ipc_byte_reg_write(void *context, unsigned int reg,
 307                                        unsigned int val)
 308 {
 309         int i2c_addr;
 310         u8 ipc_in[3];
 311         struct intel_soc_pmic *pmic = context;
 312
 313         if (!pmic)
 314                 return -EINVAL;
 315
 316         if (reg & REG_ADDR_MASK)
 317                 i2c_addr = (reg & REG_ADDR_MASK) >> REG_ADDR_SHIFT;
 318         else
 319                 i2c_addr = BXTWC_DEVICE1_ADDR;
 320
 321         reg &= REG_OFFSET_MASK;
 322
 323         ipc_in[0] = reg;
 324         ipc_in[1] = i2c_addr;
 325         ipc_in[2] = val;
 326         return intel_scu_ipc_dev_command(pmic->scu, PMC_PMIC_ACCESS,
 327                                          PMC_PMIC_WRITE, ipc_in, sizeof(ipc_in),
 328                                          NULL, 0);
 329 }
 330
 331 /* sysfs interfaces to r/w PMIC registers, required by initial script */
 332 static unsigned long bxtwc_reg_addr;
 333 static ssize_t bxtwc_reg_show(struct device *dev,
 334                 struct device_attribute *attr, char *buf)
 335 {
 336         return sprintf(buf, "0x%lx\n", bxtwc_reg_addr);
 337 }
 338
 339 static ssize_t bxtwc_reg_store(struct device *dev,
 340         struct device_attribute *attr, const char *buf, size_t count)
 341 {
 342         if (kstrtoul(buf, 0, &bxtwc_reg_addr)) {
 343                 dev_err(dev, "Invalid register address\n");
 344                 return -EINVAL;
 345         }
 346         return (ssize_t)count;
 347 }
 348
 349 static ssize_t bxtwc_val_show(struct device *dev,
 350                 struct device_attribute *attr, char *buf)
 351 {
 352         int ret;
 353         unsigned int val;
 354         struct intel_soc_pmic *pmic = dev_get_drvdata(dev);
 355
 356         ret = regmap_read(pmic->regmap, bxtwc_reg_addr, &val);
 357         if (ret < 0) {
 358                 dev_err(dev, "Failed to read 0x%lx\n", bxtwc_reg_addr);
 359                 return -EIO;
 360         }
 361
 362         return sprintf(buf, "0x%02x\n", val);
 363 }
 364
 365 static ssize_t bxtwc_val_store(struct device *dev,
 366         struct device_attribute *attr, const char *buf, size_t count)
 367 {
 368         int ret;
 369         unsigned int val;
 370         struct intel_soc_pmic *pmic = dev_get_drvdata(dev);
 371
 372         ret = kstrtouint(buf, 0, &val);
 373         if (ret)
 374                 return ret;
 375
 376         ret = regmap_write(pmic->regmap, bxtwc_reg_addr, val);
 377         if (ret) {
 378                 dev_err(dev, "Failed to write value 0x%02x to address 0x%lx",
 379                         val, bxtwc_reg_addr);
 380                 return -EIO;
 381         }
 382         return count;
 383 }
 384
 385 static DEVICE_ATTR(addr, S_IWUSR | S_IRUSR, bxtwc_reg_show, bxtwc_reg_store);
 386 static DEVICE_ATTR(val, S_IWUSR | S_IRUSR, bxtwc_val_show, bxtwc_val_store);
 387 static struct attribute *bxtwc_attrs[] = {
 388         &dev_attr_addr.attr,
 389         &dev_attr_val.attr,
 390         NULL
 391 };
 392
 393 static const struct attribute_group bxtwc_group = {
 394         .attrs = bxtwc_attrs,
 395 };
 396
 397 static const struct regmap_config bxtwc_regmap_config = {
 398         .reg_bits = 16,
 399         .val_bits = 8,
 400         .reg_write = regmap_ipc_byte_reg_write,
 401         .reg_read = regmap_ipc_byte_reg_read,
 402 };
 403
 404 static int bxtwc_add_chained_irq_chip(struct intel_soc_pmic *pmic,
 405                                 struct regmap_irq_chip_data *pdata,
 406                                 int pirq, int irq_flags,
 407                                 const struct regmap_irq_chip *chip,
 408                                 struct regmap_irq_chip_data **data)
 409 {
 410         int irq;
 411
 412         irq = regmap_irq_get_virq(pdata, pirq);
 413         if (irq < 0) {
 414                 dev_err(pmic->dev,
 415                         "Failed to get parent vIRQ(%d) for chip %s, ret:%d\n",
 416                         pirq, chip->name, irq);
 417                 return irq;
 418         }
 419
 420         return devm_regmap_add_irq_chip(pmic->dev, pmic->regmap, irq, irq_flags,
 421                                         0, chip, data);
 422 }
 423
 424 static int bxtwc_probe(struct platform_device *pdev)
 425 {
 426         int ret;
 427         acpi_handle handle;
 428         acpi_status status;
 429         unsigned long long hrv;
 430         struct intel_soc_pmic *pmic;
 431
 432         handle = ACPI_HANDLE(&pdev->dev);
 433         status = acpi_evaluate_integer(handle, "_HRV", NULL, &hrv);
 434         if (ACPI_FAILURE(status)) {
 435                 dev_err(&pdev->dev, "Failed to get PMIC hardware revision\n");
 436                 return -ENODEV;
 437         }
 438         if (hrv != BROXTON_PMIC_WC_HRV) {
 439                 dev_err(&pdev->dev, "Invalid PMIC hardware revision: %llu\n",
 440                         hrv);
 441                 return -ENODEV;
 442         }
 443
 444         pmic = devm_kzalloc(&pdev->dev, sizeof(*pmic), GFP_KERNEL);
 445         if (!pmic)
 446                 return -ENOMEM;
 447
 448         ret = platform_get_irq(pdev, 0);
 449         if (ret < 0)
 450                 return ret;
 451         pmic->irq = ret;
 452
 453         dev_set_drvdata(&pdev->dev, pmic);
 454         pmic->dev = &pdev->dev;
 455
 456         pmic->scu = devm_intel_scu_ipc_dev_get(&pdev->dev);
 457         if (!pmic->scu)
 458                 return -EPROBE_DEFER;
 459
 460         pmic->regmap = devm_regmap_init(&pdev->dev, NULL, pmic,
 461                                         &bxtwc_regmap_config);
 462         if (IS_ERR(pmic->regmap)) {
 463                 ret = PTR_ERR(pmic->regmap);
 464                 dev_err(&pdev->dev, "Failed to initialise regmap: %d\n", ret);
 465                 return ret;
 466         }
 467
 468         ret = devm_regmap_add_irq_chip(&pdev->dev, pmic->regmap, pmic->irq,
 469                                        IRQF_ONESHOT | IRQF_SHARED,
 470                                        0, &bxtwc_regmap_irq_chip,
 471                                        &pmic->irq_chip_data);
 472         if (ret) {
 473                 dev_err(&pdev->dev, "Failed to add IRQ chip\n");
 474                 return ret;
 475         }
 476
 477         ret = bxtwc_add_chained_irq_chip(pmic, pmic->irq_chip_data,
 478                                          BXTWC_PWRBTN_LVL1_IRQ,
 479                                          IRQF_ONESHOT,
 480                                          &bxtwc_regmap_irq_chip_pwrbtn,
 481                                          &pmic->irq_chip_data_pwrbtn);
 482         if (ret) {
 483                 dev_err(&pdev->dev, "Failed to add PWRBTN IRQ chip\n");
 484                 return ret;
 485         }
 486
 487         ret = bxtwc_add_chained_irq_chip(pmic, pmic->irq_chip_data,
 488                                          BXTWC_TMU_LVL1_IRQ,
 489                                          IRQF_ONESHOT,
 490                                          &bxtwc_regmap_irq_chip_tmu,
 491                                          &pmic->irq_chip_data_tmu);
 492         if (ret) {
 493                 dev_err(&pdev->dev, "Failed to add TMU IRQ chip\n");
 494                 return ret;
 495         }
 496
 497         /* Add chained IRQ handler for BCU IRQs */
 498         ret = bxtwc_add_chained_irq_chip(pmic, pmic->irq_chip_data,
 499                                          BXTWC_BCU_LVL1_IRQ,
 500                                          IRQF_ONESHOT,
 501                                          &bxtwc_regmap_irq_chip_bcu,
 502                                          &pmic->irq_chip_data_bcu);
 503
 504
 505         if (ret) {
 506                 dev_err(&pdev->dev, "Failed to add BUC IRQ chip\n");
 507                 return ret;
 508         }
 509
 510         /* Add chained IRQ handler for ADC IRQs */
 511         ret = bxtwc_add_chained_irq_chip(pmic, pmic->irq_chip_data,
 512                                          BXTWC_ADC_LVL1_IRQ,
 513                                          IRQF_ONESHOT,
 514                                          &bxtwc_regmap_irq_chip_adc,
 515                                          &pmic->irq_chip_data_adc);
 516
 517
 518         if (ret) {
 519                 dev_err(&pdev->dev, "Failed to add ADC IRQ chip\n");
 520                 return ret;
 521         }
 522
 523         /* Add chained IRQ handler for CHGR IRQs */
 524         ret = bxtwc_add_chained_irq_chip(pmic, pmic->irq_chip_data,
 525                                          BXTWC_CHGR_LVL1_IRQ,
 526                                          IRQF_ONESHOT,
 527                                          &bxtwc_regmap_irq_chip_chgr,
 528                                          &pmic->irq_chip_data_chgr);
 529
 530
 531         if (ret) {
 532                 dev_err(&pdev->dev, "Failed to add CHGR IRQ chip\n");
 533                 return ret;
 534         }
 535
 536         /* Add chained IRQ handler for CRIT IRQs */
 537         ret = bxtwc_add_chained_irq_chip(pmic, pmic->irq_chip_data,
 538                                          BXTWC_CRIT_LVL1_IRQ,
 539                                          IRQF_ONESHOT,
 540                                          &bxtwc_regmap_irq_chip_crit,
 541                                          &pmic->irq_chip_data_crit);
 542
 543
 544         if (ret) {
 545                 dev_err(&pdev->dev, "Failed to add CRIT IRQ chip\n");
 546                 return ret;
 547         }
 548
 549         ret = devm_mfd_add_devices(&pdev->dev, PLATFORM_DEVID_NONE, bxt_wc_dev,
 550                                    ARRAY_SIZE(bxt_wc_dev), NULL, 0, NULL);
 551         if (ret) {
 552                 dev_err(&pdev->dev, "Failed to add devices\n");
 553                 return ret;
 554         }
 555
 556         ret = sysfs_create_group(&pdev->dev.kobj, &bxtwc_group);
 557         if (ret) {
 558                 dev_err(&pdev->dev, "Failed to create sysfs group %d\n", ret);
 559                 return ret;
 560         }
 561
 562         /*
 563          * There is known hw bug. Upon reset BIT 5 of register
 564          * BXTWC_CHGR_LVL1_IRQ is 0 which is the expected value. However,
 565          * later it's set to 1(masked) automatically by hardware. So we
 566          * have the software workaround here to unmaksed it in order to let
 567          * charger interrutp work.
 568          */
 569         regmap_update_bits(pmic->regmap, BXTWC_MIRQLVL1,
 570                                 BXTWC_MIRQLVL1_MCHGR, 0);
 571
 572         return 0;
 573 }
 574
 575 static int bxtwc_remove(struct platform_device *pdev)
 576 {
 577         sysfs_remove_group(&pdev->dev.kobj, &bxtwc_group);
 578
 579         return 0;
 580 }
 581
 582 static void bxtwc_shutdown(struct platform_device *pdev)
 583 {
 584         struct intel_soc_pmic *pmic = dev_get_drvdata(&pdev->dev);
 585
 586         disable_irq(pmic->irq);
 587 }
 588
 589 #ifdef CONFIG_PM_SLEEP
 590 static int bxtwc_suspend(struct device *dev)
 591 {
 592         struct intel_soc_pmic *pmic = dev_get_drvdata(dev);
 593
 594         disable_irq(pmic->irq);
 595
 596         return 0;
 597 }
 598
 599 static int bxtwc_resume(struct device *dev)
 600 {
 601         struct intel_soc_pmic *pmic = dev_get_drvdata(dev);
 602
 603         enable_irq(pmic->irq);
 604         return 0;
 605 }
 606 #endif
 607 static SIMPLE_DEV_PM_OPS(bxtwc_pm_ops, bxtwc_suspend, bxtwc_resume);
 608
 609 static const struct acpi_device_id bxtwc_acpi_ids[] = {
 610         { "INT34D3", },
 611         { }
 612 };
 613 MODULE_DEVICE_TABLE(acpi, bxtwc_acpi_ids);
 614
 615 static struct platform_driver bxtwc_driver = {
 616         .probe = bxtwc_probe,
 617         .remove = bxtwc_remove,
 618         .shutdown = bxtwc_shutdown,
 619         .driver = {
 620                 .name   = "BXTWC PMIC",
 621                 .pm     = &bxtwc_pm_ops,
 622                 .acpi_match_table = ACPI_PTR(bxtwc_acpi_ids),
 623         },
 624 };
 625
 626 module_platform_driver(bxtwc_driver);
 627
 628 MODULE_LICENSE("GPL v2");
 629 MODULE_AUTHOR("Qipeng Zha<qipeng.zha@intel.com>");