drivers/mfd/ab8500-core.c

   1 /*
   2  * Copyright (C) ST-Ericsson SA 2010
   3  *
   4  * License Terms: GNU General Public License v2
   5  * Author: Srinidhi Kasagar <srinidhi.kasagar@stericsson.com>
   6  * Author: Rabin Vincent <rabin.vincent@stericsson.com>
   7  * Author: Mattias Wallin <mattias.wallin@stericsson.com>
   8  */
   9
  10 #include <linux/kernel.h>
  11 #include <linux/slab.h>
  12 #include <linux/init.h>
  13 #include <linux/irq.h>
  14 #include <linux/irqdomain.h>
  15 #include <linux/delay.h>
  16 #include <linux/interrupt.h>
  17 #include <linux/module.h>
  18 #include <linux/platform_device.h>
  19 #include <linux/mfd/core.h>
  20 #include <linux/mfd/abx500.h>
  21 #include <linux/mfd/abx500/ab8500.h>
  22 #include <linux/mfd/abx500/ab8500-bm.h>
  23 #include <linux/mfd/dbx500-prcmu.h>
  24 #include <linux/regulator/ab8500.h>
  25 #include <linux/of.h>
  26 #include <linux/of_device.h>
  27
  28 /*
  29  * Interrupt register offsets
  30  * Bank : 0x0E
  31  */
  32 #define AB8500_IT_SOURCE1_REG           0x00
  33 #define AB8500_IT_SOURCE2_REG           0x01
  34 #define AB8500_IT_SOURCE3_REG           0x02
  35 #define AB8500_IT_SOURCE4_REG           0x03
  36 #define AB8500_IT_SOURCE5_REG           0x04
  37 #define AB8500_IT_SOURCE6_REG           0x05
  38 #define AB8500_IT_SOURCE7_REG           0x06
  39 #define AB8500_IT_SOURCE8_REG           0x07
  40 #define AB9540_IT_SOURCE13_REG          0x0C
  41 #define AB8500_IT_SOURCE19_REG          0x12
  42 #define AB8500_IT_SOURCE20_REG          0x13
  43 #define AB8500_IT_SOURCE21_REG          0x14
  44 #define AB8500_IT_SOURCE22_REG          0x15
  45 #define AB8500_IT_SOURCE23_REG          0x16
  46 #define AB8500_IT_SOURCE24_REG          0x17
  47
  48 /*
  49  * latch registers
  50  */
  51 #define AB8500_IT_LATCH1_REG            0x20
  52 #define AB8500_IT_LATCH2_REG            0x21
  53 #define AB8500_IT_LATCH3_REG            0x22
  54 #define AB8500_IT_LATCH4_REG            0x23
  55 #define AB8500_IT_LATCH5_REG            0x24
  56 #define AB8500_IT_LATCH6_REG            0x25
  57 #define AB8500_IT_LATCH7_REG            0x26
  58 #define AB8500_IT_LATCH8_REG            0x27
  59 #define AB8500_IT_LATCH9_REG            0x28
  60 #define AB8500_IT_LATCH10_REG           0x29
  61 #define AB8500_IT_LATCH12_REG           0x2B
  62 #define AB9540_IT_LATCH13_REG           0x2C
  63 #define AB8500_IT_LATCH19_REG           0x32
  64 #define AB8500_IT_LATCH20_REG           0x33
  65 #define AB8500_IT_LATCH21_REG           0x34
  66 #define AB8500_IT_LATCH22_REG           0x35
  67 #define AB8500_IT_LATCH23_REG           0x36
  68 #define AB8500_IT_LATCH24_REG           0x37
  69
  70 /*
  71  * mask registers
  72  */
  73
  74 #define AB8500_IT_MASK1_REG             0x40
  75 #define AB8500_IT_MASK2_REG             0x41
  76 #define AB8500_IT_MASK3_REG             0x42
  77 #define AB8500_IT_MASK4_REG             0x43
  78 #define AB8500_IT_MASK5_REG             0x44
  79 #define AB8500_IT_MASK6_REG             0x45
  80 #define AB8500_IT_MASK7_REG             0x46
  81 #define AB8500_IT_MASK8_REG             0x47
  82 #define AB8500_IT_MASK9_REG             0x48
  83 #define AB8500_IT_MASK10_REG            0x49
  84 #define AB8500_IT_MASK11_REG            0x4A
  85 #define AB8500_IT_MASK12_REG            0x4B
  86 #define AB8500_IT_MASK13_REG            0x4C
  87 #define AB8500_IT_MASK14_REG            0x4D
  88 #define AB8500_IT_MASK15_REG            0x4E
  89 #define AB8500_IT_MASK16_REG            0x4F
  90 #define AB8500_IT_MASK17_REG            0x50
  91 #define AB8500_IT_MASK18_REG            0x51
  92 #define AB8500_IT_MASK19_REG            0x52
  93 #define AB8500_IT_MASK20_REG            0x53
  94 #define AB8500_IT_MASK21_REG            0x54
  95 #define AB8500_IT_MASK22_REG            0x55
  96 #define AB8500_IT_MASK23_REG            0x56
  97 #define AB8500_IT_MASK24_REG            0x57
  98 #define AB8500_IT_MASK25_REG            0x58
  99
 100 /*
 101  * latch hierarchy registers
 102  */
 103 #define AB8500_IT_LATCHHIER1_REG        0x60
 104 #define AB8500_IT_LATCHHIER2_REG        0x61
 105 #define AB8500_IT_LATCHHIER3_REG        0x62
 106 #define AB8540_IT_LATCHHIER4_REG        0x63
 107
 108 #define AB8500_IT_LATCHHIER_NUM         3
 109 #define AB8540_IT_LATCHHIER_NUM         4
 110
 111 #define AB8500_REV_REG                  0x80
 112 #define AB8500_IC_NAME_REG              0x82
 113 #define AB8500_SWITCH_OFF_STATUS        0x00
 114
 115 #define AB8500_TURN_ON_STATUS           0x00
 116 #define AB8505_TURN_ON_STATUS_2 0x04
 117
 118 #define AB8500_CH_USBCH_STAT1_REG       0x02
 119 #define VBUS_DET_DBNC100                0x02
 120 #define VBUS_DET_DBNC1                  0x01
 121
 122 static DEFINE_SPINLOCK(on_stat_lock);
 123 static u8 turn_on_stat_mask = 0xFF;
 124 static u8 turn_on_stat_set;
 125 static bool no_bm; /* No battery management */
 126 module_param(no_bm, bool, S_IRUGO);
 127
 128 #define AB9540_MODEM_CTRL2_REG                  0x23
 129 #define AB9540_MODEM_CTRL2_SWDBBRSTN_BIT        BIT(2)
 130
 131 /*
 132  * Map interrupt numbers to the LATCH and MASK register offsets, Interrupt
 133  * numbers are indexed into this array with (num / 8). The interupts are
 134  * defined in linux/mfd/ab8500.h
 135  *
 136  * This is one off from the register names, i.e. AB8500_IT_MASK1_REG is at
 137  * offset 0.
 138  */
 139 /* AB8500 support */
 140 static const int ab8500_irq_regoffset[AB8500_NUM_IRQ_REGS] = {
 141         0, 1, 2, 3, 4, 6, 7, 8, 9, 11, 18, 19, 20, 21,
 142 };
 143
 144 /* AB9540 / AB8505 support */
 145 static const int ab9540_irq_regoffset[AB9540_NUM_IRQ_REGS] = {
 146         0, 1, 2, 3, 4, 6, 7, 8, 9, 11, 18, 19, 20, 21, 12, 13, 24, 5, 22, 23
 147 };
 148
 149 /* AB8540 support */
 150 static const int ab8540_irq_regoffset[AB8540_NUM_IRQ_REGS] = {
 151         0, 1, 2, 3, 4, -1, -1, -1, -1, 11, 18, 19, 20, 21, 12, 13, 24, 5, 22,
 152         23, 25, 26, 27, 28, 29, 30, 31,
 153 };
 154
 155 static const char ab8500_version_str[][7] = {
 156         [AB8500_VERSION_AB8500] = "AB8500",
 157         [AB8500_VERSION_AB8505] = "AB8505",
 158         [AB8500_VERSION_AB9540] = "AB9540",
 159         [AB8500_VERSION_AB8540] = "AB8540",
 160 };
 161
 162 static int ab8500_prcmu_write(struct ab8500 *ab8500, u16 addr, u8 data)
 163 {
 164         int ret;
 165
 166         ret = prcmu_abb_write((u8)(addr >> 8), (u8)(addr & 0xFF), &data, 1);
 167         if (ret < 0)
 168                 dev_err(ab8500->dev, "prcmu i2c error %d\n", ret);
 169         return ret;
 170 }
 171
 172 static int ab8500_prcmu_write_masked(struct ab8500 *ab8500, u16 addr, u8 mask,
 173         u8 data)
 174 {
 175         int ret;
 176
 177         ret = prcmu_abb_write_masked((u8)(addr >> 8), (u8)(addr & 0xFF), &data,
 178                 &mask, 1);
 179         if (ret < 0)
 180                 dev_err(ab8500->dev, "prcmu i2c error %d\n", ret);
 181         return ret;
 182 }
 183
 184 static int ab8500_prcmu_read(struct ab8500 *ab8500, u16 addr)
 185 {
 186         int ret;
 187         u8 data;
 188
 189         ret = prcmu_abb_read((u8)(addr >> 8), (u8)(addr & 0xFF), &data, 1);
 190         if (ret < 0) {
 191                 dev_err(ab8500->dev, "prcmu i2c error %d\n", ret);
 192                 return ret;
 193         }
 194         return (int)data;
 195 }
 196
 197 static int ab8500_get_chip_id(struct device *dev)
 198 {
 199         struct ab8500 *ab8500;
 200
 201         if (!dev)
 202                 return -EINVAL;
 203         ab8500 = dev_get_drvdata(dev->parent);
 204         return ab8500 ? (int)ab8500->chip_id : -EINVAL;
 205 }
 206
 207 static int set_register_interruptible(struct ab8500 *ab8500, u8 bank,
 208         u8 reg, u8 data)
 209 {
 210         int ret;
 211         /*
 212          * Put the u8 bank and u8 register together into a an u16.
 213          * The bank on higher 8 bits and register in lower 8 bits.
 214          * */
 215         u16 addr = ((u16)bank) << 8 | reg;
 216
 217         dev_vdbg(ab8500->dev, "wr: addr %#x <= %#x\n", addr, data);
 218
 219         mutex_lock(&ab8500->lock);
 220
 221         ret = ab8500->write(ab8500, addr, data);
 222         if (ret < 0)
 223                 dev_err(ab8500->dev, "failed to write reg %#x: %d\n",
 224                         addr, ret);
 225         mutex_unlock(&ab8500->lock);
 226
 227         return ret;
 228 }
 229
 230 static int ab8500_set_register(struct device *dev, u8 bank,
 231         u8 reg, u8 value)
 232 {
 233         int ret;
 234         struct ab8500 *ab8500 = dev_get_drvdata(dev->parent);
 235
 236         atomic_inc(&ab8500->transfer_ongoing);
 237         ret = set_register_interruptible(ab8500, bank, reg, value);
 238         atomic_dec(&ab8500->transfer_ongoing);
 239         return ret;
 240 }
 241
 242 static int get_register_interruptible(struct ab8500 *ab8500, u8 bank,
 243         u8 reg, u8 *value)
 244 {
 245         int ret;
 246         /* put the u8 bank and u8 reg together into a an u16.
 247          * bank on higher 8 bits and reg in lower */
 248         u16 addr = ((u16)bank) << 8 | reg;
 249
 250         mutex_lock(&ab8500->lock);
 251
 252         ret = ab8500->read(ab8500, addr);
 253         if (ret < 0)
 254                 dev_err(ab8500->dev, "failed to read reg %#x: %d\n",
 255                         addr, ret);
 256         else
 257                 *value = ret;
 258
 259         mutex_unlock(&ab8500->lock);
 260         dev_vdbg(ab8500->dev, "rd: addr %#x => data %#x\n", addr, ret);
 261
 262         return ret;
 263 }
 264
 265 static int ab8500_get_register(struct device *dev, u8 bank,
 266         u8 reg, u8 *value)
 267 {
 268         int ret;
 269         struct ab8500 *ab8500 = dev_get_drvdata(dev->parent);
 270
 271         atomic_inc(&ab8500->transfer_ongoing);
 272         ret = get_register_interruptible(ab8500, bank, reg, value);
 273         atomic_dec(&ab8500->transfer_ongoing);
 274         return ret;
 275 }
 276
 277 static int mask_and_set_register_interruptible(struct ab8500 *ab8500, u8 bank,
 278         u8 reg, u8 bitmask, u8 bitvalues)
 279 {
 280         int ret;
 281         /* put the u8 bank and u8 reg together into a an u16.
 282          * bank on higher 8 bits and reg in lower */
 283         u16 addr = ((u16)bank) << 8 | reg;
 284
 285         mutex_lock(&ab8500->lock);
 286
 287         if (ab8500->write_masked == NULL) {
 288                 u8 data;
 289
 290                 ret = ab8500->read(ab8500, addr);
 291                 if (ret < 0) {
 292                         dev_err(ab8500->dev, "failed to read reg %#x: %d\n",
 293                                 addr, ret);
 294                         goto out;
 295                 }
 296
 297                 data = (u8)ret;
 298                 data = (~bitmask & data) | (bitmask & bitvalues);
 299
 300                 ret = ab8500->write(ab8500, addr, data);
 301                 if (ret < 0)
 302                         dev_err(ab8500->dev, "failed to write reg %#x: %d\n",
 303                                 addr, ret);
 304
 305                 dev_vdbg(ab8500->dev, "mask: addr %#x => data %#x\n", addr,
 306                         data);
 307                 goto out;
 308         }
 309         ret = ab8500->write_masked(ab8500, addr, bitmask, bitvalues);
 310         if (ret < 0)
 311                 dev_err(ab8500->dev, "failed to modify reg %#x: %d\n", addr,
 312                         ret);
 313 out:
 314         mutex_unlock(&ab8500->lock);
 315         return ret;
 316 }
 317
 318 static int ab8500_mask_and_set_register(struct device *dev,
 319         u8 bank, u8 reg, u8 bitmask, u8 bitvalues)
 320 {
 321         int ret;
 322         struct ab8500 *ab8500 = dev_get_drvdata(dev->parent);
 323
 324         atomic_inc(&ab8500->transfer_ongoing);
 325         ret = mask_and_set_register_interruptible(ab8500, bank, reg,
 326                                                  bitmask, bitvalues);
 327         atomic_dec(&ab8500->transfer_ongoing);
 328         return ret;
 329 }
 330
 331 static struct abx500_ops ab8500_ops = {
 332         .get_chip_id = ab8500_get_chip_id,
 333         .get_register = ab8500_get_register,
 334         .set_register = ab8500_set_register,
 335         .get_register_page = NULL,
 336         .set_register_page = NULL,
 337         .mask_and_set_register = ab8500_mask_and_set_register,
 338         .event_registers_startup_state_get = NULL,
 339         .startup_irq_enabled = NULL,
 340         .dump_all_banks = ab8500_dump_all_banks,
 341 };
 342
 343 static void ab8500_irq_lock(struct irq_data *data)
 344 {
 345         struct ab8500 *ab8500 = irq_data_get_irq_chip_data(data);
 346
 347         mutex_lock(&ab8500->irq_lock);
 348         atomic_inc(&ab8500->transfer_ongoing);
 349 }
 350
 351 static void ab8500_irq_sync_unlock(struct irq_data *data)
 352 {
 353         struct ab8500 *ab8500 = irq_data_get_irq_chip_data(data);
 354         int i;
 355
 356         for (i = 0; i < ab8500->mask_size; i++) {
 357                 u8 old = ab8500->oldmask[i];
 358                 u8 new = ab8500->mask[i];
 359                 int reg;
 360
 361                 if (new == old)
 362                         continue;
 363
 364                 /*
 365                  * Interrupt register 12 doesn't exist prior to AB8500 version
 366                  * 2.0
 367                  */
 368                 if (ab8500->irq_reg_offset[i] == 11 &&
 369                         is_ab8500_1p1_or_earlier(ab8500))
 370                         continue;
 371
 372                 if (ab8500->irq_reg_offset[i] < 0)
 373                         continue;
 374
 375                 ab8500->oldmask[i] = new;
 376
 377                 reg = AB8500_IT_MASK1_REG + ab8500->irq_reg_offset[i];
 378                 set_register_interruptible(ab8500, AB8500_INTERRUPT, reg, new);
 379         }
 380         atomic_dec(&ab8500->transfer_ongoing);
 381         mutex_unlock(&ab8500->irq_lock);
 382 }
 383
 384 static void ab8500_irq_mask(struct irq_data *data)
 385 {
 386         struct ab8500 *ab8500 = irq_data_get_irq_chip_data(data);
 387         int offset = data->hwirq;
 388         int index = offset / 8;
 389         int mask = 1 << (offset % 8);
 390
 391         ab8500->mask[index] |= mask;
 392
 393         /* The AB8500 GPIOs have two interrupts each (rising & falling). */
 394         if (offset >= AB8500_INT_GPIO6R && offset <= AB8500_INT_GPIO41R)
 395                 ab8500->mask[index + 2] |= mask;
 396         if (offset >= AB9540_INT_GPIO50R && offset <= AB9540_INT_GPIO54R)
 397                 ab8500->mask[index + 1] |= mask;
 398         if (offset == AB8540_INT_GPIO43R || offset == AB8540_INT_GPIO44R)
 399                 /* Here the falling IRQ is one bit lower */
 400                 ab8500->mask[index] |= (mask << 1);
 401 }
 402
 403 static void ab8500_irq_unmask(struct irq_data *data)
 404 {
 405         struct ab8500 *ab8500 = irq_data_get_irq_chip_data(data);
 406         unsigned int type = irqd_get_trigger_type(data);
 407         int offset = data->hwirq;
 408         int index = offset / 8;
 409         int mask = 1 << (offset % 8);
 410
 411         if (type & IRQ_TYPE_EDGE_RISING)
 412                 ab8500->mask[index] &= ~mask;
 413
 414         /* The AB8500 GPIOs have two interrupts each (rising & falling). */
 415         if (type & IRQ_TYPE_EDGE_FALLING) {
 416                 if (offset >= AB8500_INT_GPIO6R && offset <= AB8500_INT_GPIO41R)
 417                         ab8500->mask[index + 2] &= ~mask;
 418                 else if (offset >= AB9540_INT_GPIO50R &&
 419                          offset <= AB9540_INT_GPIO54R)
 420                         ab8500->mask[index + 1] &= ~mask;
 421                 else if (offset == AB8540_INT_GPIO43R ||
 422                          offset == AB8540_INT_GPIO44R)
 423                         /* Here the falling IRQ is one bit lower */
 424                         ab8500->mask[index] &= ~(mask << 1);
 425                 else
 426                         ab8500->mask[index] &= ~mask;
 427         } else {
 428                 /* Satisfies the case where type is not set. */
 429                 ab8500->mask[index] &= ~mask;
 430         }
 431 }
 432
 433 static int ab8500_irq_set_type(struct irq_data *data, unsigned int type)
 434 {
 435         return 0;
 436 }
 437
 438 static struct irq_chip ab8500_irq_chip = {
 439         .name                   = "ab8500",
 440         .irq_bus_lock           = ab8500_irq_lock,
 441         .irq_bus_sync_unlock    = ab8500_irq_sync_unlock,
 442         .irq_mask               = ab8500_irq_mask,
 443         .irq_disable            = ab8500_irq_mask,
 444         .irq_unmask             = ab8500_irq_unmask,
 445         .irq_set_type           = ab8500_irq_set_type,
 446 };
 447
 448 static void update_latch_offset(u8 *offset, int i)
 449 {
 450         /* Fix inconsistent ITFromLatch25 bit mapping... */
 451         if (unlikely(*offset == 17))
 452                         *offset = 24;
 453         /* Fix inconsistent ab8540 bit mapping... */
 454         if (unlikely(*offset == 16))
 455                         *offset = 25;
 456         if ((i == 3) && (*offset >= 24))
 457                         *offset += 2;
 458 }
 459
 460 static int ab8500_handle_hierarchical_line(struct ab8500 *ab8500,
 461                                         int latch_offset, u8 latch_val)
 462 {
 463         int int_bit, line, i;
 464
 465         for (i = 0; i < ab8500->mask_size; i++)
 466                 if (ab8500->irq_reg_offset[i] == latch_offset)
 467                         break;
 468
 469         if (i >= ab8500->mask_size) {
 470                 dev_err(ab8500->dev, "Register offset 0x%2x not declared\n",
 471                                 latch_offset);
 472                 return -ENXIO;
 473         }
 474
 475         /* ignore masked out interrupts */
 476         latch_val &= ~ab8500->mask[i];
 477
 478         while (latch_val) {
 479                 int_bit = __ffs(latch_val);
 480                 line = (i << 3) + int_bit;
 481                 latch_val &= ~(1 << int_bit);
 482
 483                 /*
 484                  * This handles the falling edge hwirqs from the GPIO
 485                  * lines. Route them back to the line registered for the
 486                  * rising IRQ, as this is merely a flag for the same IRQ
 487                  * in linux terms.
 488                  */
 489                 if (line >= AB8500_INT_GPIO6F && line <= AB8500_INT_GPIO41F)
 490                         line -= 16;
 491                 if (line >= AB9540_INT_GPIO50F && line <= AB9540_INT_GPIO54F)
 492                         line -= 8;
 493                 if (line == AB8540_INT_GPIO43F || line == AB8540_INT_GPIO44F)
 494                         line += 1;
 495
 496                 handle_nested_irq(irq_create_mapping(ab8500->domain, line));
 497         }
 498
 499         return 0;
 500 }
 501
 502 static int ab8500_handle_hierarchical_latch(struct ab8500 *ab8500,
 503                                         int hier_offset, u8 hier_val)
 504 {
 505         int latch_bit, status;
 506         u8 latch_offset, latch_val;
 507
 508         do {
 509                 latch_bit = __ffs(hier_val);
 510                 latch_offset = (hier_offset << 3) + latch_bit;
 511
 512                 update_latch_offset(&latch_offset, hier_offset);
 513
 514                 status = get_register_interruptible(ab8500,
 515                                 AB8500_INTERRUPT,
 516                                 AB8500_IT_LATCH1_REG + latch_offset,
 517                                 &latch_val);
 518                 if (status < 0 || latch_val == 0)
 519                         goto discard;
 520
 521                 status = ab8500_handle_hierarchical_line(ab8500,
 522                                 latch_offset, latch_val);
 523                 if (status < 0)
 524                         return status;
 525 discard:
 526                 hier_val &= ~(1 << latch_bit);
 527         } while (hier_val);
 528
 529         return 0;
 530 }
 531
 532 static irqreturn_t ab8500_hierarchical_irq(int irq, void *dev)
 533 {
 534         struct ab8500 *ab8500 = dev;
 535         u8 i;
 536
 537         dev_vdbg(ab8500->dev, "interrupt\n");
 538
 539         /*  Hierarchical interrupt version */
 540         for (i = 0; i < (ab8500->it_latchhier_num); i++) {
 541                 int status;
 542                 u8 hier_val;
 543
 544                 status = get_register_interruptible(ab8500, AB8500_INTERRUPT,
 545                         AB8500_IT_LATCHHIER1_REG + i, &hier_val);
 546                 if (status < 0 || hier_val == 0)
 547                         continue;
 548
 549                 status = ab8500_handle_hierarchical_latch(ab8500, i, hier_val);
 550                 if (status < 0)
 551                         break;
 552         }
 553         return IRQ_HANDLED;
 554 }
 555
 556 static int ab8500_irq_map(struct irq_domain *d, unsigned int virq,
 557                                 irq_hw_number_t hwirq)
 558 {
 559         struct ab8500 *ab8500 = d->host_data;
 560
 561         if (!ab8500)
 562                 return -EINVAL;
 563
 564         irq_set_chip_data(virq, ab8500);
 565         irq_set_chip_and_handler(virq, &ab8500_irq_chip,
 566                                 handle_simple_irq);
 567         irq_set_nested_thread(virq, 1);
 568         irq_set_noprobe(virq);
 569
 570         return 0;
 571 }
 572
 573 static const struct irq_domain_ops ab8500_irq_ops = {
 574         .map    = ab8500_irq_map,
 575         .xlate  = irq_domain_xlate_twocell,
 576 };
 577
 578 static int ab8500_irq_init(struct ab8500 *ab8500, struct device_node *np)
 579 {
 580         int num_irqs;
 581
 582         if (is_ab8540(ab8500))
 583                 num_irqs = AB8540_NR_IRQS;
 584         else if (is_ab9540(ab8500))
 585                 num_irqs = AB9540_NR_IRQS;
 586         else if (is_ab8505(ab8500))
 587                 num_irqs = AB8505_NR_IRQS;
 588         else
 589                 num_irqs = AB8500_NR_IRQS;
 590
 591         /* If ->irq_base is zero this will give a linear mapping */
 592         ab8500->domain = irq_domain_add_simple(ab8500->dev->of_node,
 593                         num_irqs, 0,
 594                         &ab8500_irq_ops, ab8500);
 595
 596         if (!ab8500->domain) {
 597                 dev_err(ab8500->dev, "Failed to create irqdomain\n");
 598                 return -ENOSYS;
 599         }
 600
 601         return 0;
 602 }
 603
 604 int ab8500_suspend(struct ab8500 *ab8500)
 605 {
 606         if (atomic_read(&ab8500->transfer_ongoing))
 607                 return -EINVAL;
 608
 609         return 0;
 610 }
 611
 612 static const struct mfd_cell ab8500_bm_devs[] = {
 613         {
 614                 .name = "ab8500-charger",
 615                 .of_compatible = "stericsson,ab8500-charger",
 616                 .platform_data = &ab8500_bm_data,
 617                 .pdata_size = sizeof(ab8500_bm_data),
 618         },
 619         {
 620                 .name = "ab8500-btemp",
 621                 .of_compatible = "stericsson,ab8500-btemp",
 622                 .platform_data = &ab8500_bm_data,
 623                 .pdata_size = sizeof(ab8500_bm_data),
 624         },
 625         {
 626                 .name = "ab8500-fg",
 627                 .of_compatible = "stericsson,ab8500-fg",
 628                 .platform_data = &ab8500_bm_data,
 629                 .pdata_size = sizeof(ab8500_bm_data),
 630         },
 631         {
 632                 .name = "ab8500-chargalg",
 633                 .of_compatible = "stericsson,ab8500-chargalg",
 634                 .platform_data = &ab8500_bm_data,
 635                 .pdata_size = sizeof(ab8500_bm_data),
 636         },
 637 };
 638
 639 static const struct mfd_cell ab8500_devs[] = {
 640 #ifdef CONFIG_DEBUG_FS
 641         {
 642                 .name = "ab8500-debug",
 643                 .of_compatible = "stericsson,ab8500-debug",
 644         },
 645 #endif
 646         {
 647                 .name = "ab8500-sysctrl",
 648                 .of_compatible = "stericsson,ab8500-sysctrl",
 649         },
 650         {
 651                 .name = "ab8500-ext-regulator",
 652                 .of_compatible = "stericsson,ab8500-ext-regulator",
 653         },
 654         {
 655                 .name = "ab8500-regulator",
 656                 .of_compatible = "stericsson,ab8500-regulator",
 657         },
 658         {
 659                 .name = "abx500-clk",
 660                 .of_compatible = "stericsson,abx500-clk",
 661         },
 662         {
 663                 .name = "ab8500-gpadc",
 664                 .of_compatible = "stericsson,ab8500-gpadc",
 665         },
 666         {
 667                 .name = "ab8500-rtc",
 668                 .of_compatible = "stericsson,ab8500-rtc",
 669         },
 670         {
 671                 .name = "ab8500-acc-det",
 672                 .of_compatible = "stericsson,ab8500-acc-det",
 673         },
 674         {
 675
 676                 .name = "ab8500-poweron-key",
 677                 .of_compatible = "stericsson,ab8500-poweron-key",
 678         },
 679         {
 680                 .name = "ab8500-pwm",
 681                 .of_compatible = "stericsson,ab8500-pwm",
 682                 .id = 1,
 683         },
 684         {
 685                 .name = "ab8500-pwm",
 686                 .of_compatible = "stericsson,ab8500-pwm",
 687                 .id = 2,
 688         },
 689         {
 690                 .name = "ab8500-pwm",
 691                 .of_compatible = "stericsson,ab8500-pwm",
 692                 .id = 3,
 693         },
 694         {
 695                 .name = "ab8500-denc",
 696                 .of_compatible = "stericsson,ab8500-denc",
 697         },
 698         {
 699                 .name = "pinctrl-ab8500",
 700                 .of_compatible = "stericsson,ab8500-gpio",
 701         },
 702         {
 703                 .name = "abx500-temp",
 704                 .of_compatible = "stericsson,abx500-temp",
 705         },
 706         {
 707                 .name = "ab8500-usb",
 708                 .of_compatible = "stericsson,ab8500-usb",
 709         },
 710         {
 711                 .name = "ab8500-codec",
 712                 .of_compatible = "stericsson,ab8500-codec",
 713         },
 714 };
 715
 716 static const struct mfd_cell ab9540_devs[] = {
 717 #ifdef CONFIG_DEBUG_FS
 718         {
 719                 .name = "ab8500-debug",
 720         },
 721 #endif
 722         {
 723                 .name = "ab8500-sysctrl",
 724         },
 725         {
 726                 .name = "ab8500-ext-regulator",
 727         },
 728         {
 729                 .name = "ab8500-regulator",
 730         },
 731         {
 732                 .name = "abx500-clk",
 733                 .of_compatible = "stericsson,abx500-clk",
 734         },
 735         {
 736                 .name = "ab8500-gpadc",
 737                 .of_compatible = "stericsson,ab8500-gpadc",
 738         },
 739         {
 740                 .name = "ab8500-rtc",
 741         },
 742         {
 743                 .name = "ab8500-acc-det",
 744         },
 745         {
 746                 .name = "ab8500-poweron-key",
 747         },
 748         {
 749                 .name = "ab8500-pwm",
 750                 .id = 1,
 751         },
 752         {
 753                 .name = "abx500-temp",
 754         },
 755         {
 756                 .name = "pinctrl-ab9540",
 757                 .of_compatible = "stericsson,ab9540-gpio",
 758         },
 759         {
 760                 .name = "ab9540-usb",
 761         },
 762         {
 763                 .name = "ab9540-codec",
 764         },
 765         {
 766                 .name = "ab-iddet",
 767         },
 768 };
 769
 770 /* Device list for ab8505  */
 771 static const struct mfd_cell ab8505_devs[] = {
 772 #ifdef CONFIG_DEBUG_FS
 773         {
 774                 .name = "ab8500-debug",
 775         },
 776 #endif
 777         {
 778                 .name = "ab8500-sysctrl",
 779         },
 780         {
 781                 .name = "ab8500-regulator",
 782         },
 783         {
 784                 .name = "abx500-clk",
 785                 .of_compatible = "stericsson,abx500-clk",
 786         },
 787         {
 788                 .name = "ab8500-gpadc",
 789                 .of_compatible = "stericsson,ab8500-gpadc",
 790         },
 791         {
 792                 .name = "ab8500-rtc",
 793         },
 794         {
 795                 .name = "ab8500-acc-det",
 796         },
 797         {
 798                 .name = "ab8500-poweron-key",
 799         },
 800         {
 801                 .name = "ab8500-pwm",
 802                 .id = 1,
 803         },
 804         {
 805                 .name = "pinctrl-ab8505",
 806         },
 807         {
 808                 .name = "ab8500-usb",
 809         },
 810         {
 811                 .name = "ab8500-codec",
 812         },
 813         {
 814                 .name = "ab-iddet",
 815         },
 816 };
 817
 818 static const struct mfd_cell ab8540_devs[] = {
 819 #ifdef CONFIG_DEBUG_FS
 820         {
 821                 .name = "ab8500-debug",
 822         },
 823 #endif
 824         {
 825                 .name = "ab8500-sysctrl",
 826         },
 827         {
 828                 .name = "ab8500-ext-regulator",
 829         },
 830         {
 831                 .name = "ab8500-regulator",
 832         },
 833         {
 834                 .name = "abx500-clk",
 835                 .of_compatible = "stericsson,abx500-clk",
 836         },
 837         {
 838                 .name = "ab8500-gpadc",
 839                 .of_compatible = "stericsson,ab8500-gpadc",
 840         },
 841         {
 842                 .name = "ab8500-acc-det",
 843         },
 844         {
 845                 .name = "ab8500-poweron-key",
 846         },
 847         {
 848                 .name = "ab8500-pwm",
 849                 .id = 1,
 850         },
 851         {
 852                 .name = "abx500-temp",
 853         },
 854         {
 855                 .name = "pinctrl-ab8540",
 856         },
 857         {
 858                 .name = "ab8540-usb",
 859         },
 860         {
 861                 .name = "ab8540-codec",
 862         },
 863         {
 864                 .name = "ab-iddet",
 865         },
 866 };
 867
 868 static const struct mfd_cell ab8540_cut1_devs[] = {
 869         {
 870                 .name = "ab8500-rtc",
 871                 .of_compatible = "stericsson,ab8500-rtc",
 872         },
 873 };
 874
 875 static const struct mfd_cell ab8540_cut2_devs[] = {
 876         {
 877                 .name = "ab8540-rtc",
 878                 .of_compatible = "stericsson,ab8540-rtc",
 879         },
 880 };
 881
 882 static ssize_t show_chip_id(struct device *dev,
 883                                 struct device_attribute *attr, char *buf)
 884 {
 885         struct ab8500 *ab8500;
 886
 887         ab8500 = dev_get_drvdata(dev);
 888
 889         return sprintf(buf, "%#x\n", ab8500 ? ab8500->chip_id : -EINVAL);
 890 }
 891
 892 /*
 893  * ab8500 has switched off due to (SWITCH_OFF_STATUS):
 894  * 0x01 Swoff bit programming
 895  * 0x02 Thermal protection activation
 896  * 0x04 Vbat lower then BattOk falling threshold
 897  * 0x08 Watchdog expired
 898  * 0x10 Non presence of 32kHz clock
 899  * 0x20 Battery level lower than power on reset threshold
 900  * 0x40 Power on key 1 pressed longer than 10 seconds
 901  * 0x80 DB8500 thermal shutdown
 902  */
 903 static ssize_t show_switch_off_status(struct device *dev,
 904                                 struct device_attribute *attr, char *buf)
 905 {
 906         int ret;
 907         u8 value;
 908         struct ab8500 *ab8500;
 909
 910         ab8500 = dev_get_drvdata(dev);
 911         ret = get_register_interruptible(ab8500, AB8500_RTC,
 912                 AB8500_SWITCH_OFF_STATUS, &value);
 913         if (ret < 0)
 914                 return ret;
 915         return sprintf(buf, "%#x\n", value);
 916 }
 917
 918 /* use mask and set to override the register turn_on_stat value */
 919 void ab8500_override_turn_on_stat(u8 mask, u8 set)
 920 {
 921         spin_lock(&on_stat_lock);
 922         turn_on_stat_mask = mask;
 923         turn_on_stat_set = set;
 924         spin_unlock(&on_stat_lock);
 925 }
 926
 927 /*
 928  * ab8500 has turned on due to (TURN_ON_STATUS):
 929  * 0x01 PORnVbat
 930  * 0x02 PonKey1dbF
 931  * 0x04 PonKey2dbF
 932  * 0x08 RTCAlarm
 933  * 0x10 MainChDet
 934  * 0x20 VbusDet
 935  * 0x40 UsbIDDetect
 936  * 0x80 Reserved
 937  */
 938 static ssize_t show_turn_on_status(struct device *dev,
 939                                 struct device_attribute *attr, char *buf)
 940 {
 941         int ret;
 942         u8 value;
 943         struct ab8500 *ab8500;
 944
 945         ab8500 = dev_get_drvdata(dev);
 946         ret = get_register_interruptible(ab8500, AB8500_SYS_CTRL1_BLOCK,
 947                 AB8500_TURN_ON_STATUS, &value);
 948         if (ret < 0)
 949                 return ret;
 950
 951         /*
 952          * In L9540, turn_on_status register is not updated correctly if
 953          * the device is rebooted with AC/USB charger connected. Due to
 954          * this, the device boots android instead of entering into charge
 955          * only mode. Read the AC/USB status register to detect the charger
 956          * presence and update the turn on status manually.
 957          */
 958         if (is_ab9540(ab8500)) {
 959                 spin_lock(&on_stat_lock);
 960                 value = (value & turn_on_stat_mask) | turn_on_stat_set;
 961                 spin_unlock(&on_stat_lock);
 962         }
 963
 964         return sprintf(buf, "%#x\n", value);
 965 }
 966
 967 static ssize_t show_turn_on_status_2(struct device *dev,
 968                                 struct device_attribute *attr, char *buf)
 969 {
 970         int ret;
 971         u8 value;
 972         struct ab8500 *ab8500;
 973
 974         ab8500 = dev_get_drvdata(dev);
 975         ret = get_register_interruptible(ab8500, AB8500_SYS_CTRL1_BLOCK,
 976                 AB8505_TURN_ON_STATUS_2, &value);
 977         if (ret < 0)
 978                 return ret;
 979         return sprintf(buf, "%#x\n", (value & 0x1));
 980 }
 981
 982 static ssize_t show_ab9540_dbbrstn(struct device *dev,
 983                                 struct device_attribute *attr, char *buf)
 984 {
 985         struct ab8500 *ab8500;
 986         int ret;
 987         u8 value;
 988
 989         ab8500 = dev_get_drvdata(dev);
 990
 991         ret = get_register_interruptible(ab8500, AB8500_REGU_CTRL2,
 992                 AB9540_MODEM_CTRL2_REG, &value);
 993         if (ret < 0)
 994                 return ret;
 995
 996         return sprintf(buf, "%d\n",
 997                         (value & AB9540_MODEM_CTRL2_SWDBBRSTN_BIT) ? 1 : 0);
 998 }
 999
1000 static ssize_t store_ab9540_dbbrstn(struct device *dev,
1001         struct device_attribute *attr, const char *buf, size_t count)
1002 {
1003         struct ab8500 *ab8500;
1004         int ret = count;
1005         int err;
1006         u8 bitvalues;
1007
1008         ab8500 = dev_get_drvdata(dev);
1009
1010         if (count > 0) {
1011                 switch (buf[0]) {
1012                 case '0':
1013                         bitvalues = 0;
1014                         break;
1015                 case '1':
1016                         bitvalues = AB9540_MODEM_CTRL2_SWDBBRSTN_BIT;
1017                         break;
1018                 default:
1019                         goto exit;
1020                 }
1021
1022                 err = mask_and_set_register_interruptible(ab8500,
1023                         AB8500_REGU_CTRL2, AB9540_MODEM_CTRL2_REG,
1024                         AB9540_MODEM_CTRL2_SWDBBRSTN_BIT, bitvalues);
1025                 if (err)
1026                         dev_info(ab8500->dev,
1027                                 "Failed to set DBBRSTN %c, err %#x\n",
1028                                 buf[0], err);
1029         }
1030
1031 exit:
1032         return ret;
1033 }
1034
1035 static DEVICE_ATTR(chip_id, S_IRUGO, show_chip_id, NULL);
1036 static DEVICE_ATTR(switch_off_status, S_IRUGO, show_switch_off_status, NULL);
1037 static DEVICE_ATTR(turn_on_status, S_IRUGO, show_turn_on_status, NULL);
1038 static DEVICE_ATTR(turn_on_status_2, S_IRUGO, show_turn_on_status_2, NULL);
1039 static DEVICE_ATTR(dbbrstn, S_IRUGO | S_IWUSR,
1040                         show_ab9540_dbbrstn, store_ab9540_dbbrstn);
1041
1042 static struct attribute *ab8500_sysfs_entries[] = {
1043         &dev_attr_chip_id.attr,
1044         &dev_attr_switch_off_status.attr,
1045         &dev_attr_turn_on_status.attr,
1046         NULL,
1047 };
1048
1049 static struct attribute *ab8505_sysfs_entries[] = {
1050         &dev_attr_turn_on_status_2.attr,
1051         NULL,
1052 };
1053
1054 static struct attribute *ab9540_sysfs_entries[] = {
1055         &dev_attr_chip_id.attr,
1056         &dev_attr_switch_off_status.attr,
1057         &dev_attr_turn_on_status.attr,
1058         &dev_attr_dbbrstn.attr,
1059         NULL,
1060 };
1061
1062 static struct attribute_group ab8500_attr_group = {
1063         .attrs  = ab8500_sysfs_entries,
1064 };
1065
1066 static struct attribute_group ab8505_attr_group = {
1067         .attrs  = ab8505_sysfs_entries,
1068 };
1069
1070 static struct attribute_group ab9540_attr_group = {
1071         .attrs  = ab9540_sysfs_entries,
1072 };
1073
1074 static int ab8500_probe(struct platform_device *pdev)
1075 {
1076         static const char *switch_off_status[] = {
1077                 "Swoff bit programming",
1078                 "Thermal protection activation",
1079                 "Vbat lower then BattOk falling threshold",
1080                 "Watchdog expired",
1081                 "Non presence of 32kHz clock",
1082                 "Battery level lower than power on reset threshold",
1083                 "Power on key 1 pressed longer than 10 seconds",
1084                 "DB8500 thermal shutdown"};
1085         static const char *turn_on_status[] = {
1086                 "Battery rising (Vbat)",
1087                 "Power On Key 1 dbF",
1088                 "Power On Key 2 dbF",
1089                 "RTC Alarm",
1090                 "Main Charger Detect",
1091                 "Vbus Detect (USB)",
1092                 "USB ID Detect",
1093                 "UART Factory Mode Detect"};
1094         struct ab8500_platform_data *plat = dev_get_platdata(&pdev->dev);
1095         const struct platform_device_id *platid = platform_get_device_id(pdev);
1096         enum ab8500_version version = AB8500_VERSION_UNDEFINED;
1097         struct device_node *np = pdev->dev.of_node;
1098         struct ab8500 *ab8500;
1099         struct resource *resource;
1100         int ret;
1101         int i;
1102         u8 value;
1103
1104         ab8500 = devm_kzalloc(&pdev->dev, sizeof(*ab8500), GFP_KERNEL);
1105         if (!ab8500)
1106                 return -ENOMEM;
1107
1108         ab8500->dev = &pdev->dev;
1109
1110         resource = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1111         if (!resource) {
1112                 dev_err(&pdev->dev, "no IRQ resource\n");
1113                 return -ENODEV;
1114         }
1115
1116         ab8500->irq = resource->start;
1117
1118         ab8500->read = ab8500_prcmu_read;
1119         ab8500->write = ab8500_prcmu_write;
1120         ab8500->write_masked = ab8500_prcmu_write_masked;
1121
1122         mutex_init(&ab8500->lock);
1123         mutex_init(&ab8500->irq_lock);
1124         atomic_set(&ab8500->transfer_ongoing, 0);
1125
1126         platform_set_drvdata(pdev, ab8500);
1127
1128         if (platid)
1129                 version = platid->driver_data;
1130
1131         if (version != AB8500_VERSION_UNDEFINED)
1132                 ab8500->version = version;
1133         else {
1134                 ret = get_register_interruptible(ab8500, AB8500_MISC,
1135                         AB8500_IC_NAME_REG, &value);
1136                 if (ret < 0) {
1137                         dev_err(&pdev->dev, "could not probe HW\n");
1138                         return ret;
1139                 }
1140
1141                 ab8500->version = value;
1142         }
1143
1144         ret = get_register_interruptible(ab8500, AB8500_MISC,
1145                 AB8500_REV_REG, &value);
1146         if (ret < 0)
1147                 return ret;
1148
1149         ab8500->chip_id = value;
1150
1151         dev_info(ab8500->dev, "detected chip, %s rev. %1x.%1x\n",
1152                         ab8500_version_str[ab8500->version],
1153                         ab8500->chip_id >> 4,
1154                         ab8500->chip_id & 0x0F);
1155
1156         /* Configure AB8540 */
1157         if (is_ab8540(ab8500)) {
1158                 ab8500->mask_size = AB8540_NUM_IRQ_REGS;
1159                 ab8500->irq_reg_offset = ab8540_irq_regoffset;
1160                 ab8500->it_latchhier_num = AB8540_IT_LATCHHIER_NUM;
1161         } /* Configure AB8500 or AB9540 IRQ */
1162         else if (is_ab9540(ab8500) || is_ab8505(ab8500)) {
1163                 ab8500->mask_size = AB9540_NUM_IRQ_REGS;
1164                 ab8500->irq_reg_offset = ab9540_irq_regoffset;
1165                 ab8500->it_latchhier_num = AB8500_IT_LATCHHIER_NUM;
1166         } else {
1167                 ab8500->mask_size = AB8500_NUM_IRQ_REGS;
1168                 ab8500->irq_reg_offset = ab8500_irq_regoffset;
1169                 ab8500->it_latchhier_num = AB8500_IT_LATCHHIER_NUM;
1170         }
1171         ab8500->mask = devm_kzalloc(&pdev->dev, ab8500->mask_size,
1172                                     GFP_KERNEL);
1173         if (!ab8500->mask)
1174                 return -ENOMEM;
1175         ab8500->oldmask = devm_kzalloc(&pdev->dev, ab8500->mask_size,
1176                                        GFP_KERNEL);
1177         if (!ab8500->oldmask)
1178                 return -ENOMEM;
1179
1180         /*
1181          * ab8500 has switched off due to (SWITCH_OFF_STATUS):
1182          * 0x01 Swoff bit programming
1183          * 0x02 Thermal protection activation
1184          * 0x04 Vbat lower then BattOk falling threshold
1185          * 0x08 Watchdog expired
1186          * 0x10 Non presence of 32kHz clock
1187          * 0x20 Battery level lower than power on reset threshold
1188          * 0x40 Power on key 1 pressed longer than 10 seconds
1189          * 0x80 DB8500 thermal shutdown
1190          */
1191
1192         ret = get_register_interruptible(ab8500, AB8500_RTC,
1193                 AB8500_SWITCH_OFF_STATUS, &value);
1194         if (ret < 0)
1195                 return ret;
1196         dev_info(ab8500->dev, "switch off cause(s) (%#x): ", value);
1197
1198         if (value) {
1199                 for (i = 0; i < ARRAY_SIZE(switch_off_status); i++) {
1200                         if (value & 1)
1201                                 pr_cont(" \"%s\"", switch_off_status[i]);
1202                         value = value >> 1;
1203
1204                 }
1205                 pr_cont("\n");
1206         } else {
1207                 pr_cont(" None\n");
1208         }
1209         ret = get_register_interruptible(ab8500, AB8500_SYS_CTRL1_BLOCK,
1210                 AB8500_TURN_ON_STATUS, &value);
1211         if (ret < 0)
1212                 return ret;
1213         dev_info(ab8500->dev, "turn on reason(s) (%#x): ", value);
1214
1215         if (value) {
1216                 for (i = 0; i < ARRAY_SIZE(turn_on_status); i++) {
1217                         if (value & 1)
1218                                 pr_cont("\"%s\" ", turn_on_status[i]);
1219                         value = value >> 1;
1220                 }
1221                 pr_cont("\n");
1222         } else {
1223                 pr_cont("None\n");
1224         }
1225
1226         if (plat && plat->init)
1227                 plat->init(ab8500);
1228
1229         if (is_ab9540(ab8500)) {
1230                 ret = get_register_interruptible(ab8500, AB8500_CHARGER,
1231                         AB8500_CH_USBCH_STAT1_REG, &value);
1232                 if (ret < 0)
1233                         return ret;
1234                 if ((value & VBUS_DET_DBNC1) && (value & VBUS_DET_DBNC100))
1235                         ab8500_override_turn_on_stat(~AB8500_POW_KEY_1_ON,
1236                                                      AB8500_VBUS_DET);
1237         }
1238
1239         /* Clear and mask all interrupts */
1240         for (i = 0; i < ab8500->mask_size; i++) {
1241                 /*
1242                  * Interrupt register 12 doesn't exist prior to AB8500 version
1243                  * 2.0
1244                  */
1245                 if (ab8500->irq_reg_offset[i] == 11 &&
1246                                 is_ab8500_1p1_or_earlier(ab8500))
1247                         continue;
1248
1249                 if (ab8500->irq_reg_offset[i] < 0)
1250                         continue;
1251
1252                 get_register_interruptible(ab8500, AB8500_INTERRUPT,
1253                         AB8500_IT_LATCH1_REG + ab8500->irq_reg_offset[i],
1254                         &value);
1255                 set_register_interruptible(ab8500, AB8500_INTERRUPT,
1256                         AB8500_IT_MASK1_REG + ab8500->irq_reg_offset[i], 0xff);
1257         }
1258
1259         ret = abx500_register_ops(ab8500->dev, &ab8500_ops);
1260         if (ret)
1261                 return ret;
1262
1263         for (i = 0; i < ab8500->mask_size; i++)
1264                 ab8500->mask[i] = ab8500->oldmask[i] = 0xff;
1265
1266         ret = ab8500_irq_init(ab8500, np);
1267         if (ret)
1268                 return ret;
1269
1270         ret = devm_request_threaded_irq(&pdev->dev, ab8500->irq, NULL,
1271                         ab8500_hierarchical_irq,
1272                         IRQF_ONESHOT | IRQF_NO_SUSPEND,
1273                         "ab8500", ab8500);
1274         if (ret)
1275                 return ret;
1276
1277         if (is_ab9540(ab8500))
1278                 ret = mfd_add_devices(ab8500->dev, 0, ab9540_devs,
1279                                 ARRAY_SIZE(ab9540_devs), NULL,
1280                                 0, ab8500->domain);
1281         else if (is_ab8540(ab8500)) {
1282                 ret = mfd_add_devices(ab8500->dev, 0, ab8540_devs,
1283                               ARRAY_SIZE(ab8540_devs), NULL,
1284                               0, ab8500->domain);
1285                 if (ret)
1286                         return ret;
1287
1288                 if (is_ab8540_1p2_or_earlier(ab8500))
1289                         ret = mfd_add_devices(ab8500->dev, 0, ab8540_cut1_devs,
1290                               ARRAY_SIZE(ab8540_cut1_devs), NULL,
1291                               0, ab8500->domain);
1292                 else /* ab8540 >= cut2 */
1293                         ret = mfd_add_devices(ab8500->dev, 0, ab8540_cut2_devs,
1294                               ARRAY_SIZE(ab8540_cut2_devs), NULL,
1295                               0, ab8500->domain);
1296         } else if (is_ab8505(ab8500))
1297                 ret = mfd_add_devices(ab8500->dev, 0, ab8505_devs,
1298                               ARRAY_SIZE(ab8505_devs), NULL,
1299                               0, ab8500->domain);
1300         else
1301                 ret = mfd_add_devices(ab8500->dev, 0, ab8500_devs,
1302                                 ARRAY_SIZE(ab8500_devs), NULL,
1303                                 0, ab8500->domain);
1304         if (ret)
1305                 return ret;
1306
1307         if (!no_bm) {
1308                 /* Add battery management devices */
1309                 ret = mfd_add_devices(ab8500->dev, 0, ab8500_bm_devs,
1310                                       ARRAY_SIZE(ab8500_bm_devs), NULL,
1311                                       0, ab8500->domain);
1312                 if (ret)
1313                         dev_err(ab8500->dev, "error adding bm devices\n");
1314         }
1315
1316         if (((is_ab8505(ab8500) || is_ab9540(ab8500)) &&
1317                         ab8500->chip_id >= AB8500_CUT2P0) || is_ab8540(ab8500))
1318                 ret = sysfs_create_group(&ab8500->dev->kobj,
1319                                         &ab9540_attr_group);
1320         else
1321                 ret = sysfs_create_group(&ab8500->dev->kobj,
1322                                         &ab8500_attr_group);
1323
1324         if ((is_ab8505(ab8500) || is_ab9540(ab8500)) &&
1325                         ab8500->chip_id >= AB8500_CUT2P0)
1326                 ret = sysfs_create_group(&ab8500->dev->kobj,
1327                                          &ab8505_attr_group);
1328
1329         if (ret)
1330                 dev_err(ab8500->dev, "error creating sysfs entries\n");
1331
1332         return ret;
1333 }
1334
1335 static int ab8500_remove(struct platform_device *pdev)
1336 {
1337         struct ab8500 *ab8500 = platform_get_drvdata(pdev);
1338
1339         if (((is_ab8505(ab8500) || is_ab9540(ab8500)) &&
1340                         ab8500->chip_id >= AB8500_CUT2P0) || is_ab8540(ab8500))
1341                 sysfs_remove_group(&ab8500->dev->kobj, &ab9540_attr_group);
1342         else
1343                 sysfs_remove_group(&ab8500->dev->kobj, &ab8500_attr_group);
1344
1345         if ((is_ab8505(ab8500) || is_ab9540(ab8500)) &&
1346                         ab8500->chip_id >= AB8500_CUT2P0)
1347                 sysfs_remove_group(&ab8500->dev->kobj, &ab8505_attr_group);
1348
1349         mfd_remove_devices(ab8500->dev);
1350
1351         return 0;
1352 }
1353
1354 static const struct platform_device_id ab8500_id[] = {
1355         { "ab8500-core", AB8500_VERSION_AB8500 },
1356         { "ab8505-i2c", AB8500_VERSION_AB8505 },
1357         { "ab9540-i2c", AB8500_VERSION_AB9540 },
1358         { "ab8540-i2c", AB8500_VERSION_AB8540 },
1359         { }
1360 };
1361
1362 static struct platform_driver ab8500_core_driver = {
1363         .driver = {
1364                 .name = "ab8500-core",
1365         },
1366         .probe  = ab8500_probe,
1367         .remove = ab8500_remove,
1368         .id_table = ab8500_id,
1369 };
1370
1371 static int __init ab8500_core_init(void)
1372 {
1373         return platform_driver_register(&ab8500_core_driver);
1374 }
1375
1376 static void __exit ab8500_core_exit(void)
1377 {
1378         platform_driver_unregister(&ab8500_core_driver);
1379 }
1380 core_initcall(ab8500_core_init);
1381 module_exit(ab8500_core_exit);
1382
1383 MODULE_AUTHOR("Mattias Wallin, Srinidhi Kasagar, Rabin Vincent");
1384 MODULE_DESCRIPTION("AB8500 MFD core");
1385 MODULE_LICENSE("GPL v2");