drivers/mfd/ab8500-core.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (C) ST-Ericsson SA 2010
   4  *
   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/moduleparam.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 /*
 127  * not really modular, but the easiest way to keep compat with existing
 128  * bootargs behaviour is to continue using module_param here.
 129  */
 130 module_param(no_bm, bool, S_IRUGO);
 131
 132 #define AB9540_MODEM_CTRL2_REG                  0x23
 133 #define AB9540_MODEM_CTRL2_SWDBBRSTN_BIT        BIT(2)
 134
 135 /*
 136  * Map interrupt numbers to the LATCH and MASK register offsets, Interrupt
 137  * numbers are indexed into this array with (num / 8). The interupts are
 138  * defined in linux/mfd/ab8500.h
 139  *
 140  * This is one off from the register names, i.e. AB8500_IT_MASK1_REG is at
 141  * offset 0.
 142  */
 143 /* AB8500 support */
 144 static const int ab8500_irq_regoffset[AB8500_NUM_IRQ_REGS] = {
 145         0, 1, 2, 3, 4, 6, 7, 8, 9, 11, 18, 19, 20, 21,
 146 };
 147
 148 /* AB9540 / AB8505 support */
 149 static const int ab9540_irq_regoffset[AB9540_NUM_IRQ_REGS] = {
 150         0, 1, 2, 3, 4, 6, 7, 8, 9, 11, 18, 19, 20, 21, 12, 13, 24, 5, 22, 23
 151 };
 152
 153 /* AB8540 support */
 154 static const int ab8540_irq_regoffset[AB8540_NUM_IRQ_REGS] = {
 155         0, 1, 2, 3, 4, -1, -1, -1, -1, 11, 18, 19, 20, 21, 12, 13, 24, 5, 22,
 156         23, 25, 26, 27, 28, 29, 30, 31,
 157 };
 158
 159 static const char ab8500_version_str[][7] = {
 160         [AB8500_VERSION_AB8500] = "AB8500",
 161         [AB8500_VERSION_AB8505] = "AB8505",
 162         [AB8500_VERSION_AB9540] = "AB9540",
 163         [AB8500_VERSION_AB8540] = "AB8540",
 164 };
 165
 166 static int ab8500_prcmu_write(struct ab8500 *ab8500, u16 addr, u8 data)
 167 {
 168         int ret;
 169
 170         ret = prcmu_abb_write((u8)(addr >> 8), (u8)(addr & 0xFF), &data, 1);
 171         if (ret < 0)
 172                 dev_err(ab8500->dev, "prcmu i2c error %d\n", ret);
 173         return ret;
 174 }
 175
 176 static int ab8500_prcmu_write_masked(struct ab8500 *ab8500, u16 addr, u8 mask,
 177         u8 data)
 178 {
 179         int ret;
 180
 181         ret = prcmu_abb_write_masked((u8)(addr >> 8), (u8)(addr & 0xFF), &data,
 182                 &mask, 1);
 183         if (ret < 0)
 184                 dev_err(ab8500->dev, "prcmu i2c error %d\n", ret);
 185         return ret;
 186 }
 187
 188 static int ab8500_prcmu_read(struct ab8500 *ab8500, u16 addr)
 189 {
 190         int ret;
 191         u8 data;
 192
 193         ret = prcmu_abb_read((u8)(addr >> 8), (u8)(addr & 0xFF), &data, 1);
 194         if (ret < 0) {
 195                 dev_err(ab8500->dev, "prcmu i2c error %d\n", ret);
 196                 return ret;
 197         }
 198         return (int)data;
 199 }
 200
 201 static int ab8500_get_chip_id(struct device *dev)
 202 {
 203         struct ab8500 *ab8500;
 204
 205         if (!dev)
 206                 return -EINVAL;
 207         ab8500 = dev_get_drvdata(dev->parent);
 208         return ab8500 ? (int)ab8500->chip_id : -EINVAL;
 209 }
 210
 211 static int set_register_interruptible(struct ab8500 *ab8500, u8 bank,
 212         u8 reg, u8 data)
 213 {
 214         int ret;
 215         /*
 216          * Put the u8 bank and u8 register together into a an u16.
 217          * The bank on higher 8 bits and register in lower 8 bits.
 218          */
 219         u16 addr = ((u16)bank) << 8 | reg;
 220
 221         dev_vdbg(ab8500->dev, "wr: addr %#x <= %#x\n", addr, data);
 222
 223         mutex_lock(&ab8500->lock);
 224
 225         ret = ab8500->write(ab8500, addr, data);
 226         if (ret < 0)
 227                 dev_err(ab8500->dev, "failed to write reg %#x: %d\n",
 228                         addr, ret);
 229         mutex_unlock(&ab8500->lock);
 230
 231         return ret;
 232 }
 233
 234 static int ab8500_set_register(struct device *dev, u8 bank,
 235         u8 reg, u8 value)
 236 {
 237         int ret;
 238         struct ab8500 *ab8500 = dev_get_drvdata(dev->parent);
 239
 240         atomic_inc(&ab8500->transfer_ongoing);
 241         ret = set_register_interruptible(ab8500, bank, reg, value);
 242         atomic_dec(&ab8500->transfer_ongoing);
 243         return ret;
 244 }
 245
 246 static int get_register_interruptible(struct ab8500 *ab8500, u8 bank,
 247         u8 reg, u8 *value)
 248 {
 249         int ret;
 250         u16 addr = ((u16)bank) << 8 | reg;
 251
 252         mutex_lock(&ab8500->lock);
 253
 254         ret = ab8500->read(ab8500, addr);
 255         if (ret < 0)
 256                 dev_err(ab8500->dev, "failed to read reg %#x: %d\n",
 257                         addr, ret);
 258         else
 259                 *value = ret;
 260
 261         mutex_unlock(&ab8500->lock);
 262         dev_vdbg(ab8500->dev, "rd: addr %#x => data %#x\n", addr, ret);
 263
 264         return (ret < 0) ? ret : 0;
 265 }
 266
 267 static int ab8500_get_register(struct device *dev, u8 bank,
 268         u8 reg, u8 *value)
 269 {
 270         int ret;
 271         struct ab8500 *ab8500 = dev_get_drvdata(dev->parent);
 272
 273         atomic_inc(&ab8500->transfer_ongoing);
 274         ret = get_register_interruptible(ab8500, bank, reg, value);
 275         atomic_dec(&ab8500->transfer_ongoing);
 276         return ret;
 277 }
 278
 279 static int mask_and_set_register_interruptible(struct ab8500 *ab8500, u8 bank,
 280         u8 reg, u8 bitmask, u8 bitvalues)
 281 {
 282         int ret;
 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 -ENODEV;
 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         OF_MFD_CELL("ab8500-charger", NULL, &ab8500_bm_data,
 614                     sizeof(ab8500_bm_data), 0, "stericsson,ab8500-charger"),
 615         OF_MFD_CELL("ab8500-btemp", NULL, &ab8500_bm_data,
 616                     sizeof(ab8500_bm_data), 0, "stericsson,ab8500-btemp"),
 617         OF_MFD_CELL("ab8500-fg", NULL, &ab8500_bm_data,
 618                     sizeof(ab8500_bm_data), 0, "stericsson,ab8500-fg"),
 619         OF_MFD_CELL("ab8500-chargalg", NULL, &ab8500_bm_data,
 620                     sizeof(ab8500_bm_data), 0, "stericsson,ab8500-chargalg"),
 621 };
 622
 623 static const struct mfd_cell ab8500_devs[] = {
 624 #ifdef CONFIG_DEBUG_FS
 625         OF_MFD_CELL("ab8500-debug",
 626                     NULL, NULL, 0, 0, "stericsson,ab8500-debug"),
 627 #endif
 628         OF_MFD_CELL("ab8500-sysctrl",
 629                     NULL, NULL, 0, 0, "stericsson,ab8500-sysctrl"),
 630         OF_MFD_CELL("ab8500-ext-regulator",
 631                     NULL, NULL, 0, 0, "stericsson,ab8500-ext-regulator"),
 632         OF_MFD_CELL("ab8500-regulator",
 633                     NULL, NULL, 0, 0, "stericsson,ab8500-regulator"),
 634         OF_MFD_CELL("abx500-clk",
 635                     NULL, NULL, 0, 0, "stericsson,abx500-clk"),
 636         OF_MFD_CELL("ab8500-gpadc",
 637                     NULL, NULL, 0, 0, "stericsson,ab8500-gpadc"),
 638         OF_MFD_CELL("ab8500-rtc",
 639                     NULL, NULL, 0, 0, "stericsson,ab8500-rtc"),
 640         OF_MFD_CELL("ab8500-acc-det",
 641                     NULL, NULL, 0, 0, "stericsson,ab8500-acc-det"),
 642         OF_MFD_CELL("ab8500-poweron-key",
 643                     NULL, NULL, 0, 0, "stericsson,ab8500-poweron-key"),
 644         OF_MFD_CELL("ab8500-pwm",
 645                     NULL, NULL, 0, 1, "stericsson,ab8500-pwm"),
 646         OF_MFD_CELL("ab8500-pwm",
 647                     NULL, NULL, 0, 2, "stericsson,ab8500-pwm"),
 648         OF_MFD_CELL("ab8500-pwm",
 649                     NULL, NULL, 0, 3, "stericsson,ab8500-pwm"),
 650         OF_MFD_CELL("ab8500-denc",
 651                     NULL, NULL, 0, 0, "stericsson,ab8500-denc"),
 652         OF_MFD_CELL("pinctrl-ab8500",
 653                     NULL, NULL, 0, 0, "stericsson,ab8500-gpio"),
 654         OF_MFD_CELL("abx500-temp",
 655                     NULL, NULL, 0, 0, "stericsson,abx500-temp"),
 656         OF_MFD_CELL("ab8500-usb",
 657                     NULL, NULL, 0, 0, "stericsson,ab8500-usb"),
 658         OF_MFD_CELL("ab8500-codec",
 659                     NULL, NULL, 0, 0, "stericsson,ab8500-codec"),
 660 };
 661
 662 static const struct mfd_cell ab9540_devs[] = {
 663 #ifdef CONFIG_DEBUG_FS
 664         {
 665                 .name = "ab8500-debug",
 666         },
 667 #endif
 668         {
 669                 .name = "ab8500-sysctrl",
 670         },
 671         {
 672                 .name = "ab8500-ext-regulator",
 673         },
 674         {
 675                 .name = "ab8500-regulator",
 676         },
 677         {
 678                 .name = "abx500-clk",
 679                 .of_compatible = "stericsson,abx500-clk",
 680         },
 681         {
 682                 .name = "ab8500-gpadc",
 683                 .of_compatible = "stericsson,ab8500-gpadc",
 684         },
 685         {
 686                 .name = "ab8500-rtc",
 687         },
 688         {
 689                 .name = "ab8500-acc-det",
 690         },
 691         {
 692                 .name = "ab8500-poweron-key",
 693         },
 694         {
 695                 .name = "ab8500-pwm",
 696                 .id = 1,
 697         },
 698         {
 699                 .name = "abx500-temp",
 700         },
 701         {
 702                 .name = "pinctrl-ab9540",
 703                 .of_compatible = "stericsson,ab9540-gpio",
 704         },
 705         {
 706                 .name = "ab9540-usb",
 707         },
 708         {
 709                 .name = "ab9540-codec",
 710         },
 711         {
 712                 .name = "ab-iddet",
 713         },
 714 };
 715
 716 /* Device list for ab8505  */
 717 static const struct mfd_cell ab8505_devs[] = {
 718 #ifdef CONFIG_DEBUG_FS
 719         {
 720                 .name = "ab8500-debug",
 721         },
 722 #endif
 723         {
 724                 .name = "ab8500-sysctrl",
 725         },
 726         {
 727                 .name = "ab8500-regulator",
 728         },
 729         {
 730                 .name = "abx500-clk",
 731                 .of_compatible = "stericsson,abx500-clk",
 732         },
 733         {
 734                 .name = "ab8500-gpadc",
 735                 .of_compatible = "stericsson,ab8500-gpadc",
 736         },
 737         {
 738                 .name = "ab8500-rtc",
 739         },
 740         {
 741                 .name = "ab8500-acc-det",
 742         },
 743         {
 744                 .name = "ab8500-poweron-key",
 745         },
 746         {
 747                 .name = "ab8500-pwm",
 748                 .id = 1,
 749         },
 750         {
 751                 .name = "pinctrl-ab8505",
 752         },
 753         {
 754                 .name = "ab8500-usb",
 755         },
 756         {
 757                 .name = "ab8500-codec",
 758         },
 759         {
 760                 .name = "ab-iddet",
 761         },
 762 };
 763
 764 static const struct mfd_cell ab8540_devs[] = {
 765 #ifdef CONFIG_DEBUG_FS
 766         {
 767                 .name = "ab8500-debug",
 768         },
 769 #endif
 770         {
 771                 .name = "ab8500-sysctrl",
 772         },
 773         {
 774                 .name = "ab8500-ext-regulator",
 775         },
 776         {
 777                 .name = "ab8500-regulator",
 778         },
 779         {
 780                 .name = "abx500-clk",
 781                 .of_compatible = "stericsson,abx500-clk",
 782         },
 783         {
 784                 .name = "ab8500-gpadc",
 785                 .of_compatible = "stericsson,ab8500-gpadc",
 786         },
 787         {
 788                 .name = "ab8500-acc-det",
 789         },
 790         {
 791                 .name = "ab8500-poweron-key",
 792         },
 793         {
 794                 .name = "ab8500-pwm",
 795                 .id = 1,
 796         },
 797         {
 798                 .name = "abx500-temp",
 799         },
 800         {
 801                 .name = "pinctrl-ab8540",
 802         },
 803         {
 804                 .name = "ab8540-usb",
 805         },
 806         {
 807                 .name = "ab8540-codec",
 808         },
 809         {
 810                 .name = "ab-iddet",
 811         },
 812 };
 813
 814 static const struct mfd_cell ab8540_cut1_devs[] = {
 815         {
 816                 .name = "ab8500-rtc",
 817                 .of_compatible = "stericsson,ab8500-rtc",
 818         },
 819 };
 820
 821 static const struct mfd_cell ab8540_cut2_devs[] = {
 822         {
 823                 .name = "ab8540-rtc",
 824                 .of_compatible = "stericsson,ab8540-rtc",
 825         },
 826 };
 827
 828 static ssize_t show_chip_id(struct device *dev,
 829                                 struct device_attribute *attr, char *buf)
 830 {
 831         struct ab8500 *ab8500;
 832
 833         ab8500 = dev_get_drvdata(dev);
 834
 835         return sprintf(buf, "%#x\n", ab8500 ? ab8500->chip_id : -EINVAL);
 836 }
 837
 838 /*
 839  * ab8500 has switched off due to (SWITCH_OFF_STATUS):
 840  * 0x01 Swoff bit programming
 841  * 0x02 Thermal protection activation
 842  * 0x04 Vbat lower then BattOk falling threshold
 843  * 0x08 Watchdog expired
 844  * 0x10 Non presence of 32kHz clock
 845  * 0x20 Battery level lower than power on reset threshold
 846  * 0x40 Power on key 1 pressed longer than 10 seconds
 847  * 0x80 DB8500 thermal shutdown
 848  */
 849 static ssize_t show_switch_off_status(struct device *dev,
 850                                 struct device_attribute *attr, char *buf)
 851 {
 852         int ret;
 853         u8 value;
 854         struct ab8500 *ab8500;
 855
 856         ab8500 = dev_get_drvdata(dev);
 857         ret = get_register_interruptible(ab8500, AB8500_RTC,
 858                 AB8500_SWITCH_OFF_STATUS, &value);
 859         if (ret < 0)
 860                 return ret;
 861         return sprintf(buf, "%#x\n", value);
 862 }
 863
 864 /* use mask and set to override the register turn_on_stat value */
 865 void ab8500_override_turn_on_stat(u8 mask, u8 set)
 866 {
 867         spin_lock(&on_stat_lock);
 868         turn_on_stat_mask = mask;
 869         turn_on_stat_set = set;
 870         spin_unlock(&on_stat_lock);
 871 }
 872
 873 /*
 874  * ab8500 has turned on due to (TURN_ON_STATUS):
 875  * 0x01 PORnVbat
 876  * 0x02 PonKey1dbF
 877  * 0x04 PonKey2dbF
 878  * 0x08 RTCAlarm
 879  * 0x10 MainChDet
 880  * 0x20 VbusDet
 881  * 0x40 UsbIDDetect
 882  * 0x80 Reserved
 883  */
 884 static ssize_t show_turn_on_status(struct device *dev,
 885                                 struct device_attribute *attr, char *buf)
 886 {
 887         int ret;
 888         u8 value;
 889         struct ab8500 *ab8500;
 890
 891         ab8500 = dev_get_drvdata(dev);
 892         ret = get_register_interruptible(ab8500, AB8500_SYS_CTRL1_BLOCK,
 893                 AB8500_TURN_ON_STATUS, &value);
 894         if (ret < 0)
 895                 return ret;
 896
 897         /*
 898          * In L9540, turn_on_status register is not updated correctly if
 899          * the device is rebooted with AC/USB charger connected. Due to
 900          * this, the device boots android instead of entering into charge
 901          * only mode. Read the AC/USB status register to detect the charger
 902          * presence and update the turn on status manually.
 903          */
 904         if (is_ab9540(ab8500)) {
 905                 spin_lock(&on_stat_lock);
 906                 value = (value & turn_on_stat_mask) | turn_on_stat_set;
 907                 spin_unlock(&on_stat_lock);
 908         }
 909
 910         return sprintf(buf, "%#x\n", value);
 911 }
 912
 913 static ssize_t show_turn_on_status_2(struct device *dev,
 914                                 struct device_attribute *attr, char *buf)
 915 {
 916         int ret;
 917         u8 value;
 918         struct ab8500 *ab8500;
 919
 920         ab8500 = dev_get_drvdata(dev);
 921         ret = get_register_interruptible(ab8500, AB8500_SYS_CTRL1_BLOCK,
 922                 AB8505_TURN_ON_STATUS_2, &value);
 923         if (ret < 0)
 924                 return ret;
 925         return sprintf(buf, "%#x\n", (value & 0x1));
 926 }
 927
 928 static ssize_t show_ab9540_dbbrstn(struct device *dev,
 929                                 struct device_attribute *attr, char *buf)
 930 {
 931         struct ab8500 *ab8500;
 932         int ret;
 933         u8 value;
 934
 935         ab8500 = dev_get_drvdata(dev);
 936
 937         ret = get_register_interruptible(ab8500, AB8500_REGU_CTRL2,
 938                 AB9540_MODEM_CTRL2_REG, &value);
 939         if (ret < 0)
 940                 return ret;
 941
 942         return sprintf(buf, "%d\n",
 943                         (value & AB9540_MODEM_CTRL2_SWDBBRSTN_BIT) ? 1 : 0);
 944 }
 945
 946 static ssize_t store_ab9540_dbbrstn(struct device *dev,
 947         struct device_attribute *attr, const char *buf, size_t count)
 948 {
 949         struct ab8500 *ab8500;
 950         int ret = count;
 951         int err;
 952         u8 bitvalues;
 953
 954         ab8500 = dev_get_drvdata(dev);
 955
 956         if (count > 0) {
 957                 switch (buf[0]) {
 958                 case '0':
 959                         bitvalues = 0;
 960                         break;
 961                 case '1':
 962                         bitvalues = AB9540_MODEM_CTRL2_SWDBBRSTN_BIT;
 963                         break;
 964                 default:
 965                         goto exit;
 966                 }
 967
 968                 err = mask_and_set_register_interruptible(ab8500,
 969                         AB8500_REGU_CTRL2, AB9540_MODEM_CTRL2_REG,
 970                         AB9540_MODEM_CTRL2_SWDBBRSTN_BIT, bitvalues);
 971                 if (err)
 972                         dev_info(ab8500->dev,
 973                                 "Failed to set DBBRSTN %c, err %#x\n",
 974                                 buf[0], err);
 975         }
 976
 977 exit:
 978         return ret;
 979 }
 980
 981 static DEVICE_ATTR(chip_id, S_IRUGO, show_chip_id, NULL);
 982 static DEVICE_ATTR(switch_off_status, S_IRUGO, show_switch_off_status, NULL);
 983 static DEVICE_ATTR(turn_on_status, S_IRUGO, show_turn_on_status, NULL);
 984 static DEVICE_ATTR(turn_on_status_2, S_IRUGO, show_turn_on_status_2, NULL);
 985 static DEVICE_ATTR(dbbrstn, S_IRUGO | S_IWUSR,
 986                         show_ab9540_dbbrstn, store_ab9540_dbbrstn);
 987
 988 static struct attribute *ab8500_sysfs_entries[] = {
 989         &dev_attr_chip_id.attr,
 990         &dev_attr_switch_off_status.attr,
 991         &dev_attr_turn_on_status.attr,
 992         NULL,
 993 };
 994
 995 static struct attribute *ab8505_sysfs_entries[] = {
 996         &dev_attr_turn_on_status_2.attr,
 997         NULL,
 998 };
 999
1000 static struct attribute *ab9540_sysfs_entries[] = {
1001         &dev_attr_chip_id.attr,
1002         &dev_attr_switch_off_status.attr,
1003         &dev_attr_turn_on_status.attr,
1004         &dev_attr_dbbrstn.attr,
1005         NULL,
1006 };
1007
1008 static const struct attribute_group ab8500_attr_group = {
1009         .attrs  = ab8500_sysfs_entries,
1010 };
1011
1012 static const struct attribute_group ab8505_attr_group = {
1013         .attrs  = ab8505_sysfs_entries,
1014 };
1015
1016 static const struct attribute_group ab9540_attr_group = {
1017         .attrs  = ab9540_sysfs_entries,
1018 };
1019
1020 static int ab8500_probe(struct platform_device *pdev)
1021 {
1022         static const char * const switch_off_status[] = {
1023                 "Swoff bit programming",
1024                 "Thermal protection activation",
1025                 "Vbat lower then BattOk falling threshold",
1026                 "Watchdog expired",
1027                 "Non presence of 32kHz clock",
1028                 "Battery level lower than power on reset threshold",
1029                 "Power on key 1 pressed longer than 10 seconds",
1030                 "DB8500 thermal shutdown"};
1031         static const char * const turn_on_status[] = {
1032                 "Battery rising (Vbat)",
1033                 "Power On Key 1 dbF",
1034                 "Power On Key 2 dbF",
1035                 "RTC Alarm",
1036                 "Main Charger Detect",
1037                 "Vbus Detect (USB)",
1038                 "USB ID Detect",
1039                 "UART Factory Mode Detect"};
1040         const struct platform_device_id *platid = platform_get_device_id(pdev);
1041         enum ab8500_version version = AB8500_VERSION_UNDEFINED;
1042         struct device_node *np = pdev->dev.of_node;
1043         struct ab8500 *ab8500;
1044         struct resource *resource;
1045         int ret;
1046         int i;
1047         u8 value;
1048
1049         ab8500 = devm_kzalloc(&pdev->dev, sizeof(*ab8500), GFP_KERNEL);
1050         if (!ab8500)
1051                 return -ENOMEM;
1052
1053         ab8500->dev = &pdev->dev;
1054
1055         resource = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1056         if (!resource) {
1057                 dev_err(&pdev->dev, "no IRQ resource\n");
1058                 return -ENODEV;
1059         }
1060
1061         ab8500->irq = resource->start;
1062
1063         ab8500->read = ab8500_prcmu_read;
1064         ab8500->write = ab8500_prcmu_write;
1065         ab8500->write_masked = ab8500_prcmu_write_masked;
1066
1067         mutex_init(&ab8500->lock);
1068         mutex_init(&ab8500->irq_lock);
1069         atomic_set(&ab8500->transfer_ongoing, 0);
1070
1071         platform_set_drvdata(pdev, ab8500);
1072
1073         if (platid)
1074                 version = platid->driver_data;
1075
1076         if (version != AB8500_VERSION_UNDEFINED)
1077                 ab8500->version = version;
1078         else {
1079                 ret = get_register_interruptible(ab8500, AB8500_MISC,
1080                         AB8500_IC_NAME_REG, &value);
1081                 if (ret < 0) {
1082                         dev_err(&pdev->dev, "could not probe HW\n");
1083                         return ret;
1084                 }
1085
1086                 ab8500->version = value;
1087         }
1088
1089         ret = get_register_interruptible(ab8500, AB8500_MISC,
1090                 AB8500_REV_REG, &value);
1091         if (ret < 0)
1092                 return ret;
1093
1094         ab8500->chip_id = value;
1095
1096         dev_info(ab8500->dev, "detected chip, %s rev. %1x.%1x\n",
1097                         ab8500_version_str[ab8500->version],
1098                         ab8500->chip_id >> 4,
1099                         ab8500->chip_id & 0x0F);
1100
1101         /* Configure AB8540 */
1102         if (is_ab8540(ab8500)) {
1103                 ab8500->mask_size = AB8540_NUM_IRQ_REGS;
1104                 ab8500->irq_reg_offset = ab8540_irq_regoffset;
1105                 ab8500->it_latchhier_num = AB8540_IT_LATCHHIER_NUM;
1106         } /* Configure AB8500 or AB9540 IRQ */
1107         else if (is_ab9540(ab8500) || is_ab8505(ab8500)) {
1108                 ab8500->mask_size = AB9540_NUM_IRQ_REGS;
1109                 ab8500->irq_reg_offset = ab9540_irq_regoffset;
1110                 ab8500->it_latchhier_num = AB8500_IT_LATCHHIER_NUM;
1111         } else {
1112                 ab8500->mask_size = AB8500_NUM_IRQ_REGS;
1113                 ab8500->irq_reg_offset = ab8500_irq_regoffset;
1114                 ab8500->it_latchhier_num = AB8500_IT_LATCHHIER_NUM;
1115         }
1116         ab8500->mask = devm_kzalloc(&pdev->dev, ab8500->mask_size,
1117                                     GFP_KERNEL);
1118         if (!ab8500->mask)
1119                 return -ENOMEM;
1120         ab8500->oldmask = devm_kzalloc(&pdev->dev, ab8500->mask_size,
1121                                        GFP_KERNEL);
1122         if (!ab8500->oldmask)
1123                 return -ENOMEM;
1124
1125         /*
1126          * ab8500 has switched off due to (SWITCH_OFF_STATUS):
1127          * 0x01 Swoff bit programming
1128          * 0x02 Thermal protection activation
1129          * 0x04 Vbat lower then BattOk falling threshold
1130          * 0x08 Watchdog expired
1131          * 0x10 Non presence of 32kHz clock
1132          * 0x20 Battery level lower than power on reset threshold
1133          * 0x40 Power on key 1 pressed longer than 10 seconds
1134          * 0x80 DB8500 thermal shutdown
1135          */
1136
1137         ret = get_register_interruptible(ab8500, AB8500_RTC,
1138                 AB8500_SWITCH_OFF_STATUS, &value);
1139         if (ret < 0)
1140                 return ret;
1141         dev_info(ab8500->dev, "switch off cause(s) (%#x): ", value);
1142
1143         if (value) {
1144                 for (i = 0; i < ARRAY_SIZE(switch_off_status); i++) {
1145                         if (value & 1)
1146                                 pr_cont(" \"%s\"", switch_off_status[i]);
1147                         value = value >> 1;
1148
1149                 }
1150                 pr_cont("\n");
1151         } else {
1152                 pr_cont(" None\n");
1153         }
1154         ret = get_register_interruptible(ab8500, AB8500_SYS_CTRL1_BLOCK,
1155                 AB8500_TURN_ON_STATUS, &value);
1156         if (ret < 0)
1157                 return ret;
1158         dev_info(ab8500->dev, "turn on reason(s) (%#x): ", value);
1159
1160         if (value) {
1161                 for (i = 0; i < ARRAY_SIZE(turn_on_status); i++) {
1162                         if (value & 1)
1163                                 pr_cont("\"%s\" ", turn_on_status[i]);
1164                         value = value >> 1;
1165                 }
1166                 pr_cont("\n");
1167         } else {
1168                 pr_cont("None\n");
1169         }
1170
1171         if (is_ab9540(ab8500)) {
1172                 ret = get_register_interruptible(ab8500, AB8500_CHARGER,
1173                         AB8500_CH_USBCH_STAT1_REG, &value);
1174                 if (ret < 0)
1175                         return ret;
1176                 if ((value & VBUS_DET_DBNC1) && (value & VBUS_DET_DBNC100))
1177                         ab8500_override_turn_on_stat(~AB8500_POW_KEY_1_ON,
1178                                                      AB8500_VBUS_DET);
1179         }
1180
1181         /* Clear and mask all interrupts */
1182         for (i = 0; i < ab8500->mask_size; i++) {
1183                 /*
1184                  * Interrupt register 12 doesn't exist prior to AB8500 version
1185                  * 2.0
1186                  */
1187                 if (ab8500->irq_reg_offset[i] == 11 &&
1188                                 is_ab8500_1p1_or_earlier(ab8500))
1189                         continue;
1190
1191                 if (ab8500->irq_reg_offset[i] < 0)
1192                         continue;
1193
1194                 get_register_interruptible(ab8500, AB8500_INTERRUPT,
1195                         AB8500_IT_LATCH1_REG + ab8500->irq_reg_offset[i],
1196                         &value);
1197                 set_register_interruptible(ab8500, AB8500_INTERRUPT,
1198                         AB8500_IT_MASK1_REG + ab8500->irq_reg_offset[i], 0xff);
1199         }
1200
1201         ret = abx500_register_ops(ab8500->dev, &ab8500_ops);
1202         if (ret)
1203                 return ret;
1204
1205         for (i = 0; i < ab8500->mask_size; i++)
1206                 ab8500->mask[i] = ab8500->oldmask[i] = 0xff;
1207
1208         ret = ab8500_irq_init(ab8500, np);
1209         if (ret)
1210                 return ret;
1211
1212         ret = devm_request_threaded_irq(&pdev->dev, ab8500->irq, NULL,
1213                         ab8500_hierarchical_irq,
1214                         IRQF_ONESHOT | IRQF_NO_SUSPEND,
1215                         "ab8500", ab8500);
1216         if (ret)
1217                 return ret;
1218
1219         if (is_ab9540(ab8500))
1220                 ret = mfd_add_devices(ab8500->dev, 0, ab9540_devs,
1221                                 ARRAY_SIZE(ab9540_devs), NULL,
1222                                 0, ab8500->domain);
1223         else if (is_ab8540(ab8500)) {
1224                 ret = mfd_add_devices(ab8500->dev, 0, ab8540_devs,
1225                               ARRAY_SIZE(ab8540_devs), NULL,
1226                               0, ab8500->domain);
1227                 if (ret)
1228                         return ret;
1229
1230                 if (is_ab8540_1p2_or_earlier(ab8500))
1231                         ret = mfd_add_devices(ab8500->dev, 0, ab8540_cut1_devs,
1232                               ARRAY_SIZE(ab8540_cut1_devs), NULL,
1233                               0, ab8500->domain);
1234                 else /* ab8540 >= cut2 */
1235                         ret = mfd_add_devices(ab8500->dev, 0, ab8540_cut2_devs,
1236                               ARRAY_SIZE(ab8540_cut2_devs), NULL,
1237                               0, ab8500->domain);
1238         } else if (is_ab8505(ab8500))
1239                 ret = mfd_add_devices(ab8500->dev, 0, ab8505_devs,
1240                               ARRAY_SIZE(ab8505_devs), NULL,
1241                               0, ab8500->domain);
1242         else
1243                 ret = mfd_add_devices(ab8500->dev, 0, ab8500_devs,
1244                                 ARRAY_SIZE(ab8500_devs), NULL,
1245                                 0, ab8500->domain);
1246         if (ret)
1247                 return ret;
1248
1249         if (!no_bm) {
1250                 /* Add battery management devices */
1251                 ret = mfd_add_devices(ab8500->dev, 0, ab8500_bm_devs,
1252                                       ARRAY_SIZE(ab8500_bm_devs), NULL,
1253                                       0, ab8500->domain);
1254                 if (ret)
1255                         dev_err(ab8500->dev, "error adding bm devices\n");
1256         }
1257
1258         if (((is_ab8505(ab8500) || is_ab9540(ab8500)) &&
1259                         ab8500->chip_id >= AB8500_CUT2P0) || is_ab8540(ab8500))
1260                 ret = sysfs_create_group(&ab8500->dev->kobj,
1261                                         &ab9540_attr_group);
1262         else
1263                 ret = sysfs_create_group(&ab8500->dev->kobj,
1264                                         &ab8500_attr_group);
1265
1266         if ((is_ab8505(ab8500) || is_ab9540(ab8500)) &&
1267                         ab8500->chip_id >= AB8500_CUT2P0)
1268                 ret = sysfs_create_group(&ab8500->dev->kobj,
1269                                          &ab8505_attr_group);
1270
1271         if (ret)
1272                 dev_err(ab8500->dev, "error creating sysfs entries\n");
1273
1274         return ret;
1275 }
1276
1277 static const struct platform_device_id ab8500_id[] = {
1278         { "ab8500-core", AB8500_VERSION_AB8500 },
1279         { "ab8505-i2c", AB8500_VERSION_AB8505 },
1280         { "ab9540-i2c", AB8500_VERSION_AB9540 },
1281         { "ab8540-i2c", AB8500_VERSION_AB8540 },
1282         { }
1283 };
1284
1285 static struct platform_driver ab8500_core_driver = {
1286         .driver = {
1287                 .name = "ab8500-core",
1288                 .suppress_bind_attrs = true,
1289         },
1290         .probe  = ab8500_probe,
1291         .id_table = ab8500_id,
1292 };
1293
1294 static int __init ab8500_core_init(void)
1295 {
1296         return platform_driver_register(&ab8500_core_driver);
1297 }
1298 core_initcall(ab8500_core_init);