drivers/mfd/qcom-pm8xxx.c

   1 /*
   2  * Copyright (c) 2011, Code Aurora Forum. All rights reserved.
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 2 and
   6  * only version 2 as published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  */
  13
  14 #define pr_fmt(fmt) "%s: " fmt, __func__
  15
  16 #include <linux/kernel.h>
  17 #include <linux/interrupt.h>
  18 #include <linux/irqchip/chained_irq.h>
  19 #include <linux/irq.h>
  20 #include <linux/irqdomain.h>
  21 #include <linux/module.h>
  22 #include <linux/platform_device.h>
  23 #include <linux/slab.h>
  24 #include <linux/err.h>
  25 #include <linux/ssbi.h>
  26 #include <linux/regmap.h>
  27 #include <linux/of_platform.h>
  28 #include <linux/mfd/core.h>
  29
  30 #define SSBI_REG_ADDR_IRQ_BASE          0x1BB
  31
  32 #define SSBI_REG_ADDR_IRQ_ROOT          (SSBI_REG_ADDR_IRQ_BASE + 0)
  33 #define SSBI_REG_ADDR_IRQ_M_STATUS1     (SSBI_REG_ADDR_IRQ_BASE + 1)
  34 #define SSBI_REG_ADDR_IRQ_M_STATUS2     (SSBI_REG_ADDR_IRQ_BASE + 2)
  35 #define SSBI_REG_ADDR_IRQ_M_STATUS3     (SSBI_REG_ADDR_IRQ_BASE + 3)
  36 #define SSBI_REG_ADDR_IRQ_M_STATUS4     (SSBI_REG_ADDR_IRQ_BASE + 4)
  37 #define SSBI_REG_ADDR_IRQ_BLK_SEL       (SSBI_REG_ADDR_IRQ_BASE + 5)
  38 #define SSBI_REG_ADDR_IRQ_IT_STATUS     (SSBI_REG_ADDR_IRQ_BASE + 6)
  39 #define SSBI_REG_ADDR_IRQ_CONFIG        (SSBI_REG_ADDR_IRQ_BASE + 7)
  40 #define SSBI_REG_ADDR_IRQ_RT_STATUS     (SSBI_REG_ADDR_IRQ_BASE + 8)
  41
  42 #define PM8821_SSBI_REG_ADDR_IRQ_BASE   0x100
  43 #define PM8821_SSBI_REG_ADDR_IRQ_MASTER0 (PM8821_SSBI_REG_ADDR_IRQ_BASE + 0x30)
  44 #define PM8821_SSBI_REG_ADDR_IRQ_MASTER1 (PM8821_SSBI_REG_ADDR_IRQ_BASE + 0xb0)
  45 #define PM8821_SSBI_REG(m, b, offset) \
  46                         ((m == 0) ? \
  47                         (PM8821_SSBI_REG_ADDR_IRQ_MASTER0 + b + offset) : \
  48                         (PM8821_SSBI_REG_ADDR_IRQ_MASTER1 + b + offset))
  49 #define PM8821_SSBI_ADDR_IRQ_ROOT(m, b)         PM8821_SSBI_REG(m, b, 0x0)
  50 #define PM8821_SSBI_ADDR_IRQ_CLEAR(m, b)        PM8821_SSBI_REG(m, b, 0x01)
  51 #define PM8821_SSBI_ADDR_IRQ_MASK(m, b)         PM8821_SSBI_REG(m, b, 0x08)
  52 #define PM8821_SSBI_ADDR_IRQ_RT_STATUS(m, b)    PM8821_SSBI_REG(m, b, 0x0f)
  53
  54 #define PM8821_BLOCKS_PER_MASTER        7
  55
  56 #define PM_IRQF_LVL_SEL                 0x01    /* level select */
  57 #define PM_IRQF_MASK_FE                 0x02    /* mask falling edge */
  58 #define PM_IRQF_MASK_RE                 0x04    /* mask rising edge */
  59 #define PM_IRQF_CLR                     0x08    /* clear interrupt */
  60 #define PM_IRQF_BITS_MASK               0x70
  61 #define PM_IRQF_BITS_SHIFT              4
  62 #define PM_IRQF_WRITE                   0x80
  63
  64 #define PM_IRQF_MASK_ALL                (PM_IRQF_MASK_FE | \
  65                                         PM_IRQF_MASK_RE)
  66
  67 #define REG_HWREV               0x002  /* PMIC4 revision */
  68 #define REG_HWREV_2             0x0E8  /* PMIC4 revision 2 */
  69
  70 #define PM8XXX_NR_IRQS          256
  71 #define PM8821_NR_IRQS          112
  72
  73 struct pm_irq_chip {
  74         struct regmap           *regmap;
  75         spinlock_t              pm_irq_lock;
  76         struct irq_domain       *irqdomain;
  77         unsigned int            num_irqs;
  78         unsigned int            num_blocks;
  79         unsigned int            num_masters;
  80         u8                      config[0];
  81 };
  82
  83 struct pm_irq_data {
  84         int num_irqs;
  85         const struct irq_domain_ops  *irq_domain_ops;
  86         void (*irq_handler)(struct irq_desc *desc);
  87 };
  88
  89 static int pm8xxx_read_block_irq(struct pm_irq_chip *chip, unsigned int bp,
  90                                  unsigned int *ip)
  91 {
  92         int     rc;
  93
  94         spin_lock(&chip->pm_irq_lock);
  95         rc = regmap_write(chip->regmap, SSBI_REG_ADDR_IRQ_BLK_SEL, bp);
  96         if (rc) {
  97                 pr_err("Failed Selecting Block %d rc=%d\n", bp, rc);
  98                 goto bail;
  99         }
 100
 101         rc = regmap_read(chip->regmap, SSBI_REG_ADDR_IRQ_IT_STATUS, ip);
 102         if (rc)
 103                 pr_err("Failed Reading Status rc=%d\n", rc);
 104 bail:
 105         spin_unlock(&chip->pm_irq_lock);
 106         return rc;
 107 }
 108
 109 static int
 110 pm8xxx_config_irq(struct pm_irq_chip *chip, unsigned int bp, unsigned int cp)
 111 {
 112         int     rc;
 113
 114         spin_lock(&chip->pm_irq_lock);
 115         rc = regmap_write(chip->regmap, SSBI_REG_ADDR_IRQ_BLK_SEL, bp);
 116         if (rc) {
 117                 pr_err("Failed Selecting Block %d rc=%d\n", bp, rc);
 118                 goto bail;
 119         }
 120
 121         cp |= PM_IRQF_WRITE;
 122         rc = regmap_write(chip->regmap, SSBI_REG_ADDR_IRQ_CONFIG, cp);
 123         if (rc)
 124                 pr_err("Failed Configuring IRQ rc=%d\n", rc);
 125 bail:
 126         spin_unlock(&chip->pm_irq_lock);
 127         return rc;
 128 }
 129
 130 static int pm8xxx_irq_block_handler(struct pm_irq_chip *chip, int block)
 131 {
 132         int pmirq, irq, i, ret = 0;
 133         unsigned int bits;
 134
 135         ret = pm8xxx_read_block_irq(chip, block, &bits);
 136         if (ret) {
 137                 pr_err("Failed reading %d block ret=%d", block, ret);
 138                 return ret;
 139         }
 140         if (!bits) {
 141                 pr_err("block bit set in master but no irqs: %d", block);
 142                 return 0;
 143         }
 144
 145         /* Check IRQ bits */
 146         for (i = 0; i < 8; i++) {
 147                 if (bits & (1 << i)) {
 148                         pmirq = block * 8 + i;
 149                         irq = irq_find_mapping(chip->irqdomain, pmirq);
 150                         generic_handle_irq(irq);
 151                 }
 152         }
 153         return 0;
 154 }
 155
 156 static int pm8xxx_irq_master_handler(struct pm_irq_chip *chip, int master)
 157 {
 158         unsigned int blockbits;
 159         int block_number, i, ret = 0;
 160
 161         ret = regmap_read(chip->regmap, SSBI_REG_ADDR_IRQ_M_STATUS1 + master,
 162                           &blockbits);
 163         if (ret) {
 164                 pr_err("Failed to read master %d ret=%d\n", master, ret);
 165                 return ret;
 166         }
 167         if (!blockbits) {
 168                 pr_err("master bit set in root but no blocks: %d", master);
 169                 return 0;
 170         }
 171
 172         for (i = 0; i < 8; i++)
 173                 if (blockbits & (1 << i)) {
 174                         block_number = master * 8 + i;  /* block # */
 175                         ret |= pm8xxx_irq_block_handler(chip, block_number);
 176                 }
 177         return ret;
 178 }
 179
 180 static void pm8xxx_irq_handler(struct irq_desc *desc)
 181 {
 182         struct pm_irq_chip *chip = irq_desc_get_handler_data(desc);
 183         struct irq_chip *irq_chip = irq_desc_get_chip(desc);
 184         unsigned int root;
 185         int     i, ret, masters = 0;
 186
 187         chained_irq_enter(irq_chip, desc);
 188
 189         ret = regmap_read(chip->regmap, SSBI_REG_ADDR_IRQ_ROOT, &root);
 190         if (ret) {
 191                 pr_err("Can't read root status ret=%d\n", ret);
 192                 return;
 193         }
 194
 195         /* on pm8xxx series masters start from bit 1 of the root */
 196         masters = root >> 1;
 197
 198         /* Read allowed masters for blocks. */
 199         for (i = 0; i < chip->num_masters; i++)
 200                 if (masters & (1 << i))
 201                         pm8xxx_irq_master_handler(chip, i);
 202
 203         chained_irq_exit(irq_chip, desc);
 204 }
 205
 206 static void pm8821_irq_block_handler(struct pm_irq_chip *chip,
 207                                      int master, int block)
 208 {
 209         int pmirq, irq, i, ret;
 210         unsigned int bits;
 211
 212         ret = regmap_read(chip->regmap,
 213                           PM8821_SSBI_ADDR_IRQ_ROOT(master, block), &bits);
 214         if (ret) {
 215                 pr_err("Reading block %d failed ret=%d", block, ret);
 216                 return;
 217         }
 218
 219         /* Convert block offset to global block number */
 220         block += (master * PM8821_BLOCKS_PER_MASTER) - 1;
 221
 222         /* Check IRQ bits */
 223         for (i = 0; i < 8; i++) {
 224                 if (bits & BIT(i)) {
 225                         pmirq = block * 8 + i;
 226                         irq = irq_find_mapping(chip->irqdomain, pmirq);
 227                         generic_handle_irq(irq);
 228                 }
 229         }
 230 }
 231
 232 static inline void pm8821_irq_master_handler(struct pm_irq_chip *chip,
 233                                              int master, u8 master_val)
 234 {
 235         int block;
 236
 237         for (block = 1; block < 8; block++)
 238                 if (master_val & BIT(block))
 239                         pm8821_irq_block_handler(chip, master, block);
 240 }
 241
 242 static void pm8821_irq_handler(struct irq_desc *desc)
 243 {
 244         struct pm_irq_chip *chip = irq_desc_get_handler_data(desc);
 245         struct irq_chip *irq_chip = irq_desc_get_chip(desc);
 246         unsigned int master;
 247         int ret;
 248
 249         chained_irq_enter(irq_chip, desc);
 250         ret = regmap_read(chip->regmap,
 251                           PM8821_SSBI_REG_ADDR_IRQ_MASTER0, &master);
 252         if (ret) {
 253                 pr_err("Failed to read master 0 ret=%d\n", ret);
 254                 goto done;
 255         }
 256
 257         /* bits 1 through 7 marks the first 7 blocks in master 0 */
 258         if (master & GENMASK(7, 1))
 259                 pm8821_irq_master_handler(chip, 0, master);
 260
 261         /* bit 0 marks if master 1 contains any bits */
 262         if (!(master & BIT(0)))
 263                 goto done;
 264
 265         ret = regmap_read(chip->regmap,
 266                           PM8821_SSBI_REG_ADDR_IRQ_MASTER1, &master);
 267         if (ret) {
 268                 pr_err("Failed to read master 1 ret=%d\n", ret);
 269                 goto done;
 270         }
 271
 272         pm8821_irq_master_handler(chip, 1, master);
 273
 274 done:
 275         chained_irq_exit(irq_chip, desc);
 276 }
 277
 278 static void pm8xxx_irq_mask_ack(struct irq_data *d)
 279 {
 280         struct pm_irq_chip *chip = irq_data_get_irq_chip_data(d);
 281         unsigned int pmirq = irqd_to_hwirq(d);
 282         u8      block, config;
 283
 284         block = pmirq / 8;
 285
 286         config = chip->config[pmirq] | PM_IRQF_MASK_ALL | PM_IRQF_CLR;
 287         pm8xxx_config_irq(chip, block, config);
 288 }
 289
 290 static void pm8xxx_irq_unmask(struct irq_data *d)
 291 {
 292         struct pm_irq_chip *chip = irq_data_get_irq_chip_data(d);
 293         unsigned int pmirq = irqd_to_hwirq(d);
 294         u8      block, config;
 295
 296         block = pmirq / 8;
 297
 298         config = chip->config[pmirq];
 299         pm8xxx_config_irq(chip, block, config);
 300 }
 301
 302 static int pm8xxx_irq_set_type(struct irq_data *d, unsigned int flow_type)
 303 {
 304         struct pm_irq_chip *chip = irq_data_get_irq_chip_data(d);
 305         unsigned int pmirq = irqd_to_hwirq(d);
 306         int irq_bit;
 307         u8 block, config;
 308
 309         block = pmirq / 8;
 310         irq_bit  = pmirq % 8;
 311
 312         chip->config[pmirq] = (irq_bit << PM_IRQF_BITS_SHIFT)
 313                                                         | PM_IRQF_MASK_ALL;
 314         if (flow_type & (IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING)) {
 315                 if (flow_type & IRQF_TRIGGER_RISING)
 316                         chip->config[pmirq] &= ~PM_IRQF_MASK_RE;
 317                 if (flow_type & IRQF_TRIGGER_FALLING)
 318                         chip->config[pmirq] &= ~PM_IRQF_MASK_FE;
 319         } else {
 320                 chip->config[pmirq] |= PM_IRQF_LVL_SEL;
 321
 322                 if (flow_type & IRQF_TRIGGER_HIGH)
 323                         chip->config[pmirq] &= ~PM_IRQF_MASK_RE;
 324                 else
 325                         chip->config[pmirq] &= ~PM_IRQF_MASK_FE;
 326         }
 327
 328         config = chip->config[pmirq] | PM_IRQF_CLR;
 329         return pm8xxx_config_irq(chip, block, config);
 330 }
 331
 332 static int pm8xxx_irq_get_irqchip_state(struct irq_data *d,
 333                                         enum irqchip_irq_state which,
 334                                         bool *state)
 335 {
 336         struct pm_irq_chip *chip = irq_data_get_irq_chip_data(d);
 337         unsigned int pmirq = irqd_to_hwirq(d);
 338         unsigned int bits;
 339         int irq_bit;
 340         u8 block;
 341         int rc;
 342
 343         if (which != IRQCHIP_STATE_LINE_LEVEL)
 344                 return -EINVAL;
 345
 346         block = pmirq / 8;
 347         irq_bit = pmirq % 8;
 348
 349         spin_lock(&chip->pm_irq_lock);
 350         rc = regmap_write(chip->regmap, SSBI_REG_ADDR_IRQ_BLK_SEL, block);
 351         if (rc) {
 352                 pr_err("Failed Selecting Block %d rc=%d\n", block, rc);
 353                 goto bail;
 354         }
 355
 356         rc = regmap_read(chip->regmap, SSBI_REG_ADDR_IRQ_RT_STATUS, &bits);
 357         if (rc) {
 358                 pr_err("Failed Reading Status rc=%d\n", rc);
 359                 goto bail;
 360         }
 361
 362         *state = !!(bits & BIT(irq_bit));
 363 bail:
 364         spin_unlock(&chip->pm_irq_lock);
 365
 366         return rc;
 367 }
 368
 369 static struct irq_chip pm8xxx_irq_chip = {
 370         .name           = "pm8xxx",
 371         .irq_mask_ack   = pm8xxx_irq_mask_ack,
 372         .irq_unmask     = pm8xxx_irq_unmask,
 373         .irq_set_type   = pm8xxx_irq_set_type,
 374         .irq_get_irqchip_state = pm8xxx_irq_get_irqchip_state,
 375         .flags          = IRQCHIP_MASK_ON_SUSPEND | IRQCHIP_SKIP_SET_WAKE,
 376 };
 377
 378 static int pm8xxx_irq_domain_map(struct irq_domain *d, unsigned int irq,
 379                                    irq_hw_number_t hwirq)
 380 {
 381         struct pm_irq_chip *chip = d->host_data;
 382
 383         irq_set_chip_and_handler(irq, &pm8xxx_irq_chip, handle_level_irq);
 384         irq_set_chip_data(irq, chip);
 385         irq_set_noprobe(irq);
 386
 387         return 0;
 388 }
 389
 390 static const struct irq_domain_ops pm8xxx_irq_domain_ops = {
 391         .xlate = irq_domain_xlate_twocell,
 392         .map = pm8xxx_irq_domain_map,
 393 };
 394
 395 static void pm8821_irq_mask_ack(struct irq_data *d)
 396 {
 397         struct pm_irq_chip *chip = irq_data_get_irq_chip_data(d);
 398         unsigned int pmirq = irqd_to_hwirq(d);
 399         u8 block, master;
 400         int irq_bit, rc;
 401
 402         block = pmirq / 8;
 403         master = block / PM8821_BLOCKS_PER_MASTER;
 404         irq_bit = pmirq % 8;
 405         block %= PM8821_BLOCKS_PER_MASTER;
 406
 407         rc = regmap_update_bits(chip->regmap,
 408                                 PM8821_SSBI_ADDR_IRQ_MASK(master, block),
 409                                 BIT(irq_bit), BIT(irq_bit));
 410         if (rc) {
 411                 pr_err("Failed to mask IRQ:%d rc=%d\n", pmirq, rc);
 412                 return;
 413         }
 414
 415         rc = regmap_update_bits(chip->regmap,
 416                                 PM8821_SSBI_ADDR_IRQ_CLEAR(master, block),
 417                                 BIT(irq_bit), BIT(irq_bit));
 418         if (rc)
 419                 pr_err("Failed to CLEAR IRQ:%d rc=%d\n", pmirq, rc);
 420 }
 421
 422 static void pm8821_irq_unmask(struct irq_data *d)
 423 {
 424         struct pm_irq_chip *chip = irq_data_get_irq_chip_data(d);
 425         unsigned int pmirq = irqd_to_hwirq(d);
 426         int irq_bit, rc;
 427         u8 block, master;
 428
 429         block = pmirq / 8;
 430         master = block / PM8821_BLOCKS_PER_MASTER;
 431         irq_bit = pmirq % 8;
 432         block %= PM8821_BLOCKS_PER_MASTER;
 433
 434         rc = regmap_update_bits(chip->regmap,
 435                                 PM8821_SSBI_ADDR_IRQ_MASK(master, block),
 436                                 BIT(irq_bit), ~BIT(irq_bit));
 437         if (rc)
 438                 pr_err("Failed to read/write unmask IRQ:%d rc=%d\n", pmirq, rc);
 439
 440 }
 441
 442 static int pm8821_irq_get_irqchip_state(struct irq_data *d,
 443                                         enum irqchip_irq_state which,
 444                                         bool *state)
 445 {
 446         struct pm_irq_chip *chip = irq_data_get_irq_chip_data(d);
 447         int rc, pmirq = irqd_to_hwirq(d);
 448         u8 block, irq_bit, master;
 449         unsigned int bits;
 450
 451         block = pmirq / 8;
 452         master = block / PM8821_BLOCKS_PER_MASTER;
 453         irq_bit = pmirq % 8;
 454         block %= PM8821_BLOCKS_PER_MASTER;
 455
 456         rc = regmap_read(chip->regmap,
 457                 PM8821_SSBI_ADDR_IRQ_RT_STATUS(master, block), &bits);
 458         if (rc) {
 459                 pr_err("Reading Status of IRQ %d failed rc=%d\n", pmirq, rc);
 460                 return rc;
 461         }
 462
 463         *state = !!(bits & BIT(irq_bit));
 464
 465         return rc;
 466 }
 467
 468 static struct irq_chip pm8821_irq_chip = {
 469         .name           = "pm8821",
 470         .irq_mask_ack   = pm8821_irq_mask_ack,
 471         .irq_unmask     = pm8821_irq_unmask,
 472         .irq_get_irqchip_state = pm8821_irq_get_irqchip_state,
 473         .flags          = IRQCHIP_MASK_ON_SUSPEND | IRQCHIP_SKIP_SET_WAKE,
 474 };
 475
 476 static int pm8821_irq_domain_map(struct irq_domain *d, unsigned int irq,
 477                                    irq_hw_number_t hwirq)
 478 {
 479         struct pm_irq_chip *chip = d->host_data;
 480
 481         irq_set_chip_and_handler(irq, &pm8821_irq_chip, handle_level_irq);
 482         irq_set_chip_data(irq, chip);
 483         irq_set_noprobe(irq);
 484
 485         return 0;
 486 }
 487
 488 static const struct irq_domain_ops pm8821_irq_domain_ops = {
 489         .xlate = irq_domain_xlate_twocell,
 490         .map = pm8821_irq_domain_map,
 491 };
 492
 493 static const struct regmap_config ssbi_regmap_config = {
 494         .reg_bits = 16,
 495         .val_bits = 8,
 496         .max_register = 0x3ff,
 497         .fast_io = true,
 498         .reg_read = ssbi_reg_read,
 499         .reg_write = ssbi_reg_write
 500 };
 501
 502 static const struct pm_irq_data pm8xxx_data = {
 503         .num_irqs = PM8XXX_NR_IRQS,
 504         .irq_domain_ops = &pm8xxx_irq_domain_ops,
 505         .irq_handler = pm8xxx_irq_handler,
 506 };
 507
 508 static const struct pm_irq_data pm8821_data = {
 509         .num_irqs = PM8821_NR_IRQS,
 510         .irq_domain_ops = &pm8821_irq_domain_ops,
 511         .irq_handler = pm8821_irq_handler,
 512 };
 513
 514 static const struct of_device_id pm8xxx_id_table[] = {
 515         { .compatible = "qcom,pm8018", .data = &pm8xxx_data},
 516         { .compatible = "qcom,pm8058", .data = &pm8xxx_data},
 517         { .compatible = "qcom,pm8821", .data = &pm8821_data},
 518         { .compatible = "qcom,pm8921", .data = &pm8xxx_data},
 519         { }
 520 };
 521 MODULE_DEVICE_TABLE(of, pm8xxx_id_table);
 522
 523 static int pm8xxx_probe(struct platform_device *pdev)
 524 {
 525         const struct pm_irq_data *data;
 526         struct regmap *regmap;
 527         int irq, rc;
 528         unsigned int val;
 529         u32 rev;
 530         struct pm_irq_chip *chip;
 531
 532         data = of_device_get_match_data(&pdev->dev);
 533         if (!data) {
 534                 dev_err(&pdev->dev, "No matching driver data found\n");
 535                 return -EINVAL;
 536         }
 537
 538         irq = platform_get_irq(pdev, 0);
 539         if (irq < 0)
 540                 return irq;
 541
 542         regmap = devm_regmap_init(&pdev->dev, NULL, pdev->dev.parent,
 543                                   &ssbi_regmap_config);
 544         if (IS_ERR(regmap))
 545                 return PTR_ERR(regmap);
 546
 547         /* Read PMIC chip revision */
 548         rc = regmap_read(regmap, REG_HWREV, &val);
 549         if (rc) {
 550                 pr_err("Failed to read hw rev reg %d:rc=%d\n", REG_HWREV, rc);
 551                 return rc;
 552         }
 553         pr_info("PMIC revision 1: %02X\n", val);
 554         rev = val;
 555
 556         /* Read PMIC chip revision 2 */
 557         rc = regmap_read(regmap, REG_HWREV_2, &val);
 558         if (rc) {
 559                 pr_err("Failed to read hw rev 2 reg %d:rc=%d\n",
 560                         REG_HWREV_2, rc);
 561                 return rc;
 562         }
 563         pr_info("PMIC revision 2: %02X\n", val);
 564         rev |= val << BITS_PER_BYTE;
 565
 566         chip = devm_kzalloc(&pdev->dev,
 567                             struct_size(chip, config, data->num_irqs),
 568                             GFP_KERNEL);
 569         if (!chip)
 570                 return -ENOMEM;
 571
 572         platform_set_drvdata(pdev, chip);
 573         chip->regmap = regmap;
 574         chip->num_irqs = data->num_irqs;
 575         chip->num_blocks = DIV_ROUND_UP(chip->num_irqs, 8);
 576         chip->num_masters = DIV_ROUND_UP(chip->num_blocks, 8);
 577         spin_lock_init(&chip->pm_irq_lock);
 578
 579         chip->irqdomain = irq_domain_add_linear(pdev->dev.of_node,
 580                                                 data->num_irqs,
 581                                                 data->irq_domain_ops,
 582                                                 chip);
 583         if (!chip->irqdomain)
 584                 return -ENODEV;
 585
 586         irq_set_chained_handler_and_data(irq, data->irq_handler, chip);
 587         irq_set_irq_wake(irq, 1);
 588
 589         rc = of_platform_populate(pdev->dev.of_node, NULL, NULL, &pdev->dev);
 590         if (rc) {
 591                 irq_set_chained_handler_and_data(irq, NULL, NULL);
 592                 irq_domain_remove(chip->irqdomain);
 593         }
 594
 595         return rc;
 596 }
 597
 598 static int pm8xxx_remove_child(struct device *dev, void *unused)
 599 {
 600         platform_device_unregister(to_platform_device(dev));
 601         return 0;
 602 }
 603
 604 static int pm8xxx_remove(struct platform_device *pdev)
 605 {
 606         int irq = platform_get_irq(pdev, 0);
 607         struct pm_irq_chip *chip = platform_get_drvdata(pdev);
 608
 609         device_for_each_child(&pdev->dev, NULL, pm8xxx_remove_child);
 610         irq_set_chained_handler_and_data(irq, NULL, NULL);
 611         irq_domain_remove(chip->irqdomain);
 612
 613         return 0;
 614 }
 615
 616 static struct platform_driver pm8xxx_driver = {
 617         .probe          = pm8xxx_probe,
 618         .remove         = pm8xxx_remove,
 619         .driver         = {
 620                 .name   = "pm8xxx-core",
 621                 .of_match_table = pm8xxx_id_table,
 622         },
 623 };
 624
 625 static int __init pm8xxx_init(void)
 626 {
 627         return platform_driver_register(&pm8xxx_driver);
 628 }
 629 subsys_initcall(pm8xxx_init);
 630
 631 static void __exit pm8xxx_exit(void)
 632 {
 633         platform_driver_unregister(&pm8xxx_driver);
 634 }
 635 module_exit(pm8xxx_exit);
 636
 637 MODULE_LICENSE("GPL v2");
 638 MODULE_DESCRIPTION("PMIC 8xxx core driver");
 639 MODULE_VERSION("1.0");
 640 MODULE_ALIAS("platform:pm8xxx-core");