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/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         {
 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 = "ab8500-clk",
 660                 .of_compatible = "stericsson,ab8500-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 const struct attribute_group ab8500_attr_group = {
1063         .attrs  = ab8500_sysfs_entries,
1064 };
1065
1066 static const struct attribute_group ab8505_attr_group = {
1067         .attrs  = ab8505_sysfs_entries,
1068 };
1069
1070 static const 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 * const 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 * const 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         const struct platform_device_id *platid = platform_get_device_id(pdev);
1095         enum ab8500_version version = AB8500_VERSION_UNDEFINED;
1096         struct device_node *np = pdev->dev.of_node;
1097         struct ab8500 *ab8500;
1098         struct resource *resource;
1099         int ret;
1100         int i;
1101         u8 value;
1102
1103         ab8500 = devm_kzalloc(&pdev->dev, sizeof(*ab8500), GFP_KERNEL);
1104         if (!ab8500)
1105                 return -ENOMEM;
1106
1107         ab8500->dev = &pdev->dev;
1108
1109         resource = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1110         if (!resource) {
1111                 dev_err(&pdev->dev, "no IRQ resource\n");
1112                 return -ENODEV;
1113         }
1114
1115         ab8500->irq = resource->start;
1116
1117         ab8500->read = ab8500_prcmu_read;
1118         ab8500->write = ab8500_prcmu_write;
1119         ab8500->write_masked = ab8500_prcmu_write_masked;
1120
1121         mutex_init(&ab8500->lock);
1122         mutex_init(&ab8500->irq_lock);
1123         atomic_set(&ab8500->transfer_ongoing, 0);
1124
1125         platform_set_drvdata(pdev, ab8500);
1126
1127         if (platid)
1128                 version = platid->driver_data;
1129
1130         if (version != AB8500_VERSION_UNDEFINED)
1131                 ab8500->version = version;
1132         else {
1133                 ret = get_register_interruptible(ab8500, AB8500_MISC,
1134                         AB8500_IC_NAME_REG, &value);
1135                 if (ret < 0) {
1136                         dev_err(&pdev->dev, "could not probe HW\n");
1137                         return ret;
1138                 }
1139
1140                 ab8500->version = value;
1141         }
1142
1143         ret = get_register_interruptible(ab8500, AB8500_MISC,
1144                 AB8500_REV_REG, &value);
1145         if (ret < 0)
1146                 return ret;
1147
1148         ab8500->chip_id = value;
1149
1150         dev_info(ab8500->dev, "detected chip, %s rev. %1x.%1x\n",
1151                         ab8500_version_str[ab8500->version],
1152                         ab8500->chip_id >> 4,
1153                         ab8500->chip_id & 0x0F);
1154
1155         /* Configure AB8540 */
1156         if (is_ab8540(ab8500)) {
1157                 ab8500->mask_size = AB8540_NUM_IRQ_REGS;
1158                 ab8500->irq_reg_offset = ab8540_irq_regoffset;
1159                 ab8500->it_latchhier_num = AB8540_IT_LATCHHIER_NUM;
1160         } /* Configure AB8500 or AB9540 IRQ */
1161         else if (is_ab9540(ab8500) || is_ab8505(ab8500)) {
1162                 ab8500->mask_size = AB9540_NUM_IRQ_REGS;
1163                 ab8500->irq_reg_offset = ab9540_irq_regoffset;
1164                 ab8500->it_latchhier_num = AB8500_IT_LATCHHIER_NUM;
1165         } else {
1166                 ab8500->mask_size = AB8500_NUM_IRQ_REGS;
1167                 ab8500->irq_reg_offset = ab8500_irq_regoffset;
1168                 ab8500->it_latchhier_num = AB8500_IT_LATCHHIER_NUM;
1169         }
1170         ab8500->mask = devm_kzalloc(&pdev->dev, ab8500->mask_size,
1171                                     GFP_KERNEL);
1172         if (!ab8500->mask)
1173                 return -ENOMEM;
1174         ab8500->oldmask = devm_kzalloc(&pdev->dev, ab8500->mask_size,
1175                                        GFP_KERNEL);
1176         if (!ab8500->oldmask)
1177                 return -ENOMEM;
1178
1179         /*
1180          * ab8500 has switched off due to (SWITCH_OFF_STATUS):
1181          * 0x01 Swoff bit programming
1182          * 0x02 Thermal protection activation
1183          * 0x04 Vbat lower then BattOk falling threshold
1184          * 0x08 Watchdog expired
1185          * 0x10 Non presence of 32kHz clock
1186          * 0x20 Battery level lower than power on reset threshold
1187          * 0x40 Power on key 1 pressed longer than 10 seconds
1188          * 0x80 DB8500 thermal shutdown
1189          */
1190
1191         ret = get_register_interruptible(ab8500, AB8500_RTC,
1192                 AB8500_SWITCH_OFF_STATUS, &value);
1193         if (ret < 0)
1194                 return ret;
1195         dev_info(ab8500->dev, "switch off cause(s) (%#x): ", value);
1196
1197         if (value) {
1198                 for (i = 0; i < ARRAY_SIZE(switch_off_status); i++) {
1199                         if (value & 1)
1200                                 pr_cont(" \"%s\"", switch_off_status[i]);
1201                         value = value >> 1;
1202
1203                 }
1204                 pr_cont("\n");
1205         } else {
1206                 pr_cont(" None\n");
1207         }
1208         ret = get_register_interruptible(ab8500, AB8500_SYS_CTRL1_BLOCK,
1209                 AB8500_TURN_ON_STATUS, &value);
1210         if (ret < 0)
1211                 return ret;
1212         dev_info(ab8500->dev, "turn on reason(s) (%#x): ", value);
1213
1214         if (value) {
1215                 for (i = 0; i < ARRAY_SIZE(turn_on_status); i++) {
1216                         if (value & 1)
1217                                 pr_cont("\"%s\" ", turn_on_status[i]);
1218                         value = value >> 1;
1219                 }
1220                 pr_cont("\n");
1221         } else {
1222                 pr_cont("None\n");
1223         }
1224
1225         if (is_ab9540(ab8500)) {
1226                 ret = get_register_interruptible(ab8500, AB8500_CHARGER,
1227                         AB8500_CH_USBCH_STAT1_REG, &value);
1228                 if (ret < 0)
1229                         return ret;
1230                 if ((value & VBUS_DET_DBNC1) && (value & VBUS_DET_DBNC100))
1231                         ab8500_override_turn_on_stat(~AB8500_POW_KEY_1_ON,
1232                                                      AB8500_VBUS_DET);
1233         }
1234
1235         /* Clear and mask all interrupts */
1236         for (i = 0; i < ab8500->mask_size; i++) {
1237                 /*
1238                  * Interrupt register 12 doesn't exist prior to AB8500 version
1239                  * 2.0
1240                  */
1241                 if (ab8500->irq_reg_offset[i] == 11 &&
1242                                 is_ab8500_1p1_or_earlier(ab8500))
1243                         continue;
1244
1245                 if (ab8500->irq_reg_offset[i] < 0)
1246                         continue;
1247
1248                 get_register_interruptible(ab8500, AB8500_INTERRUPT,
1249                         AB8500_IT_LATCH1_REG + ab8500->irq_reg_offset[i],
1250                         &value);
1251                 set_register_interruptible(ab8500, AB8500_INTERRUPT,
1252                         AB8500_IT_MASK1_REG + ab8500->irq_reg_offset[i], 0xff);
1253         }
1254
1255         ret = abx500_register_ops(ab8500->dev, &ab8500_ops);
1256         if (ret)
1257                 return ret;
1258
1259         for (i = 0; i < ab8500->mask_size; i++)
1260                 ab8500->mask[i] = ab8500->oldmask[i] = 0xff;
1261
1262         ret = ab8500_irq_init(ab8500, np);
1263         if (ret)
1264                 return ret;
1265
1266         ret = devm_request_threaded_irq(&pdev->dev, ab8500->irq, NULL,
1267                         ab8500_hierarchical_irq,
1268                         IRQF_ONESHOT | IRQF_NO_SUSPEND,
1269                         "ab8500", ab8500);
1270         if (ret)
1271                 return ret;
1272
1273         if (is_ab9540(ab8500))
1274                 ret = mfd_add_devices(ab8500->dev, 0, ab9540_devs,
1275                                 ARRAY_SIZE(ab9540_devs), NULL,
1276                                 0, ab8500->domain);
1277         else if (is_ab8540(ab8500)) {
1278                 ret = mfd_add_devices(ab8500->dev, 0, ab8540_devs,
1279                               ARRAY_SIZE(ab8540_devs), NULL,
1280                               0, ab8500->domain);
1281                 if (ret)
1282                         return ret;
1283
1284                 if (is_ab8540_1p2_or_earlier(ab8500))
1285                         ret = mfd_add_devices(ab8500->dev, 0, ab8540_cut1_devs,
1286                               ARRAY_SIZE(ab8540_cut1_devs), NULL,
1287                               0, ab8500->domain);
1288                 else /* ab8540 >= cut2 */
1289                         ret = mfd_add_devices(ab8500->dev, 0, ab8540_cut2_devs,
1290                               ARRAY_SIZE(ab8540_cut2_devs), NULL,
1291                               0, ab8500->domain);
1292         } else if (is_ab8505(ab8500))
1293                 ret = mfd_add_devices(ab8500->dev, 0, ab8505_devs,
1294                               ARRAY_SIZE(ab8505_devs), NULL,
1295                               0, ab8500->domain);
1296         else
1297                 ret = mfd_add_devices(ab8500->dev, 0, ab8500_devs,
1298                                 ARRAY_SIZE(ab8500_devs), NULL,
1299                                 0, ab8500->domain);
1300         if (ret)
1301                 return ret;
1302
1303         if (!no_bm) {
1304                 /* Add battery management devices */
1305                 ret = mfd_add_devices(ab8500->dev, 0, ab8500_bm_devs,
1306                                       ARRAY_SIZE(ab8500_bm_devs), NULL,
1307                                       0, ab8500->domain);
1308                 if (ret)
1309                         dev_err(ab8500->dev, "error adding bm devices\n");
1310         }
1311
1312         if (((is_ab8505(ab8500) || is_ab9540(ab8500)) &&
1313                         ab8500->chip_id >= AB8500_CUT2P0) || is_ab8540(ab8500))
1314                 ret = sysfs_create_group(&ab8500->dev->kobj,
1315                                         &ab9540_attr_group);
1316         else
1317                 ret = sysfs_create_group(&ab8500->dev->kobj,
1318                                         &ab8500_attr_group);
1319
1320         if ((is_ab8505(ab8500) || is_ab9540(ab8500)) &&
1321                         ab8500->chip_id >= AB8500_CUT2P0)
1322                 ret = sysfs_create_group(&ab8500->dev->kobj,
1323                                          &ab8505_attr_group);
1324
1325         if (ret)
1326                 dev_err(ab8500->dev, "error creating sysfs entries\n");
1327
1328         return ret;
1329 }
1330
1331 static const struct platform_device_id ab8500_id[] = {
1332         { "ab8500-core", AB8500_VERSION_AB8500 },
1333         { "ab8505-i2c", AB8500_VERSION_AB8505 },
1334         { "ab9540-i2c", AB8500_VERSION_AB9540 },
1335         { "ab8540-i2c", AB8500_VERSION_AB8540 },
1336         { }
1337 };
1338
1339 static struct platform_driver ab8500_core_driver = {
1340         .driver = {
1341                 .name = "ab8500-core",
1342                 .suppress_bind_attrs = true,
1343         },
1344         .probe  = ab8500_probe,
1345         .id_table = ab8500_id,
1346 };
1347
1348 static int __init ab8500_core_init(void)
1349 {
1350         return platform_driver_register(&ab8500_core_driver);
1351 }
1352 core_initcall(ab8500_core_init);