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/delay.h>
  15 #include <linux/interrupt.h>
  16 #include <linux/module.h>
  17 #include <linux/platform_device.h>
  18 #include <linux/mfd/core.h>
  19 #include <linux/mfd/abx500.h>
  20 #include <linux/mfd/ab8500.h>
  21 #include <linux/regulator/ab8500.h>
  22
  23 /*
  24  * Interrupt register offsets
  25  * Bank : 0x0E
  26  */
  27 #define AB8500_IT_SOURCE1_REG           0x00
  28 #define AB8500_IT_SOURCE2_REG           0x01
  29 #define AB8500_IT_SOURCE3_REG           0x02
  30 #define AB8500_IT_SOURCE4_REG           0x03
  31 #define AB8500_IT_SOURCE5_REG           0x04
  32 #define AB8500_IT_SOURCE6_REG           0x05
  33 #define AB8500_IT_SOURCE7_REG           0x06
  34 #define AB8500_IT_SOURCE8_REG           0x07
  35 #define AB8500_IT_SOURCE19_REG          0x12
  36 #define AB8500_IT_SOURCE20_REG          0x13
  37 #define AB8500_IT_SOURCE21_REG          0x14
  38 #define AB8500_IT_SOURCE22_REG          0x15
  39 #define AB8500_IT_SOURCE23_REG          0x16
  40 #define AB8500_IT_SOURCE24_REG          0x17
  41
  42 /*
  43  * latch registers
  44  */
  45 #define AB8500_IT_LATCH1_REG            0x20
  46 #define AB8500_IT_LATCH2_REG            0x21
  47 #define AB8500_IT_LATCH3_REG            0x22
  48 #define AB8500_IT_LATCH4_REG            0x23
  49 #define AB8500_IT_LATCH5_REG            0x24
  50 #define AB8500_IT_LATCH6_REG            0x25
  51 #define AB8500_IT_LATCH7_REG            0x26
  52 #define AB8500_IT_LATCH8_REG            0x27
  53 #define AB8500_IT_LATCH9_REG            0x28
  54 #define AB8500_IT_LATCH10_REG           0x29
  55 #define AB8500_IT_LATCH12_REG           0x2B
  56 #define AB8500_IT_LATCH19_REG           0x32
  57 #define AB8500_IT_LATCH20_REG           0x33
  58 #define AB8500_IT_LATCH21_REG           0x34
  59 #define AB8500_IT_LATCH22_REG           0x35
  60 #define AB8500_IT_LATCH23_REG           0x36
  61 #define AB8500_IT_LATCH24_REG           0x37
  62
  63 /*
  64  * mask registers
  65  */
  66
  67 #define AB8500_IT_MASK1_REG             0x40
  68 #define AB8500_IT_MASK2_REG             0x41
  69 #define AB8500_IT_MASK3_REG             0x42
  70 #define AB8500_IT_MASK4_REG             0x43
  71 #define AB8500_IT_MASK5_REG             0x44
  72 #define AB8500_IT_MASK6_REG             0x45
  73 #define AB8500_IT_MASK7_REG             0x46
  74 #define AB8500_IT_MASK8_REG             0x47
  75 #define AB8500_IT_MASK9_REG             0x48
  76 #define AB8500_IT_MASK10_REG            0x49
  77 #define AB8500_IT_MASK11_REG            0x4A
  78 #define AB8500_IT_MASK12_REG            0x4B
  79 #define AB8500_IT_MASK13_REG            0x4C
  80 #define AB8500_IT_MASK14_REG            0x4D
  81 #define AB8500_IT_MASK15_REG            0x4E
  82 #define AB8500_IT_MASK16_REG            0x4F
  83 #define AB8500_IT_MASK17_REG            0x50
  84 #define AB8500_IT_MASK18_REG            0x51
  85 #define AB8500_IT_MASK19_REG            0x52
  86 #define AB8500_IT_MASK20_REG            0x53
  87 #define AB8500_IT_MASK21_REG            0x54
  88 #define AB8500_IT_MASK22_REG            0x55
  89 #define AB8500_IT_MASK23_REG            0x56
  90 #define AB8500_IT_MASK24_REG            0x57
  91
  92 #define AB8500_REV_REG                  0x80
  93 #define AB8500_SWITCH_OFF_STATUS        0x00
  94
  95 /*
  96  * Map interrupt numbers to the LATCH and MASK register offsets, Interrupt
  97  * numbers are indexed into this array with (num / 8).
  98  *
  99  * This is one off from the register names, i.e. AB8500_IT_MASK1_REG is at
 100  * offset 0.
 101  */
 102 static const int ab8500_irq_regoffset[AB8500_NUM_IRQ_REGS] = {
 103         0, 1, 2, 3, 4, 6, 7, 8, 9, 11, 18, 19, 20, 21,
 104 };
 105
 106 static int ab8500_get_chip_id(struct device *dev)
 107 {
 108         struct ab8500 *ab8500;
 109
 110         if (!dev)
 111                 return -EINVAL;
 112         ab8500 = dev_get_drvdata(dev->parent);
 113         return ab8500 ? (int)ab8500->chip_id : -EINVAL;
 114 }
 115
 116 static int set_register_interruptible(struct ab8500 *ab8500, u8 bank,
 117         u8 reg, u8 data)
 118 {
 119         int ret;
 120         /*
 121          * Put the u8 bank and u8 register together into a an u16.
 122          * The bank on higher 8 bits and register in lower 8 bits.
 123          * */
 124         u16 addr = ((u16)bank) << 8 | reg;
 125
 126         dev_vdbg(ab8500->dev, "wr: addr %#x <= %#x\n", addr, data);
 127
 128         ret = mutex_lock_interruptible(&ab8500->lock);
 129         if (ret)
 130                 return ret;
 131
 132         ret = ab8500->write(ab8500, addr, data);
 133         if (ret < 0)
 134                 dev_err(ab8500->dev, "failed to write reg %#x: %d\n",
 135                         addr, ret);
 136         mutex_unlock(&ab8500->lock);
 137
 138         return ret;
 139 }
 140
 141 static int ab8500_set_register(struct device *dev, u8 bank,
 142         u8 reg, u8 value)
 143 {
 144         struct ab8500 *ab8500 = dev_get_drvdata(dev->parent);
 145
 146         return set_register_interruptible(ab8500, bank, reg, value);
 147 }
 148
 149 static int get_register_interruptible(struct ab8500 *ab8500, u8 bank,
 150         u8 reg, u8 *value)
 151 {
 152         int ret;
 153         /* put the u8 bank and u8 reg together into a an u16.
 154          * bank on higher 8 bits and reg in lower */
 155         u16 addr = ((u16)bank) << 8 | reg;
 156
 157         ret = mutex_lock_interruptible(&ab8500->lock);
 158         if (ret)
 159                 return ret;
 160
 161         ret = ab8500->read(ab8500, addr);
 162         if (ret < 0)
 163                 dev_err(ab8500->dev, "failed to read reg %#x: %d\n",
 164                         addr, ret);
 165         else
 166                 *value = ret;
 167
 168         mutex_unlock(&ab8500->lock);
 169         dev_vdbg(ab8500->dev, "rd: addr %#x => data %#x\n", addr, ret);
 170
 171         return ret;
 172 }
 173
 174 static int ab8500_get_register(struct device *dev, u8 bank,
 175         u8 reg, u8 *value)
 176 {
 177         struct ab8500 *ab8500 = dev_get_drvdata(dev->parent);
 178
 179         return get_register_interruptible(ab8500, bank, reg, value);
 180 }
 181
 182 static int mask_and_set_register_interruptible(struct ab8500 *ab8500, u8 bank,
 183         u8 reg, u8 bitmask, u8 bitvalues)
 184 {
 185         int ret;
 186         u8 data;
 187         /* put the u8 bank and u8 reg together into a an u16.
 188          * bank on higher 8 bits and reg in lower */
 189         u16 addr = ((u16)bank) << 8 | reg;
 190
 191         ret = mutex_lock_interruptible(&ab8500->lock);
 192         if (ret)
 193                 return ret;
 194
 195         ret = ab8500->read(ab8500, addr);
 196         if (ret < 0) {
 197                 dev_err(ab8500->dev, "failed to read reg %#x: %d\n",
 198                         addr, ret);
 199                 goto out;
 200         }
 201
 202         data = (u8)ret;
 203         data = (~bitmask & data) | (bitmask & bitvalues);
 204
 205         ret = ab8500->write(ab8500, addr, data);
 206         if (ret < 0)
 207                 dev_err(ab8500->dev, "failed to write reg %#x: %d\n",
 208                         addr, ret);
 209
 210         dev_vdbg(ab8500->dev, "mask: addr %#x => data %#x\n", addr, data);
 211 out:
 212         mutex_unlock(&ab8500->lock);
 213         return ret;
 214 }
 215
 216 static int ab8500_mask_and_set_register(struct device *dev,
 217         u8 bank, u8 reg, u8 bitmask, u8 bitvalues)
 218 {
 219         struct ab8500 *ab8500 = dev_get_drvdata(dev->parent);
 220
 221         return mask_and_set_register_interruptible(ab8500, bank, reg,
 222                 bitmask, bitvalues);
 223
 224 }
 225
 226 static struct abx500_ops ab8500_ops = {
 227         .get_chip_id = ab8500_get_chip_id,
 228         .get_register = ab8500_get_register,
 229         .set_register = ab8500_set_register,
 230         .get_register_page = NULL,
 231         .set_register_page = NULL,
 232         .mask_and_set_register = ab8500_mask_and_set_register,
 233         .event_registers_startup_state_get = NULL,
 234         .startup_irq_enabled = NULL,
 235 };
 236
 237 static void ab8500_irq_lock(struct irq_data *data)
 238 {
 239         struct ab8500 *ab8500 = irq_data_get_irq_chip_data(data);
 240
 241         mutex_lock(&ab8500->irq_lock);
 242 }
 243
 244 static void ab8500_irq_sync_unlock(struct irq_data *data)
 245 {
 246         struct ab8500 *ab8500 = irq_data_get_irq_chip_data(data);
 247         int i;
 248
 249         for (i = 0; i < AB8500_NUM_IRQ_REGS; i++) {
 250                 u8 old = ab8500->oldmask[i];
 251                 u8 new = ab8500->mask[i];
 252                 int reg;
 253
 254                 if (new == old)
 255                         continue;
 256
 257                 /* Interrupt register 12 doesn't exist prior to version 2.0 */
 258                 if (ab8500_irq_regoffset[i] == 11 &&
 259                         ab8500->chip_id < AB8500_CUT2P0)
 260                         continue;
 261
 262                 ab8500->oldmask[i] = new;
 263
 264                 reg = AB8500_IT_MASK1_REG + ab8500_irq_regoffset[i];
 265                 set_register_interruptible(ab8500, AB8500_INTERRUPT, reg, new);
 266         }
 267
 268         mutex_unlock(&ab8500->irq_lock);
 269 }
 270
 271 static void ab8500_irq_mask(struct irq_data *data)
 272 {
 273         struct ab8500 *ab8500 = irq_data_get_irq_chip_data(data);
 274         int offset = data->irq - ab8500->irq_base;
 275         int index = offset / 8;
 276         int mask = 1 << (offset % 8);
 277
 278         ab8500->mask[index] |= mask;
 279 }
 280
 281 static void ab8500_irq_unmask(struct irq_data *data)
 282 {
 283         struct ab8500 *ab8500 = irq_data_get_irq_chip_data(data);
 284         int offset = data->irq - ab8500->irq_base;
 285         int index = offset / 8;
 286         int mask = 1 << (offset % 8);
 287
 288         ab8500->mask[index] &= ~mask;
 289 }
 290
 291 static struct irq_chip ab8500_irq_chip = {
 292         .name                   = "ab8500",
 293         .irq_bus_lock           = ab8500_irq_lock,
 294         .irq_bus_sync_unlock    = ab8500_irq_sync_unlock,
 295         .irq_mask               = ab8500_irq_mask,
 296         .irq_unmask             = ab8500_irq_unmask,
 297 };
 298
 299 static irqreturn_t ab8500_irq(int irq, void *dev)
 300 {
 301         struct ab8500 *ab8500 = dev;
 302         int i;
 303
 304         dev_vdbg(ab8500->dev, "interrupt\n");
 305
 306         for (i = 0; i < AB8500_NUM_IRQ_REGS; i++) {
 307                 int regoffset = ab8500_irq_regoffset[i];
 308                 int status;
 309                 u8 value;
 310
 311                 /* Interrupt register 12 doesn't exist prior to version 2.0 */
 312                 if (regoffset == 11 && ab8500->chip_id < AB8500_CUT2P0)
 313                         continue;
 314
 315                 status = get_register_interruptible(ab8500, AB8500_INTERRUPT,
 316                         AB8500_IT_LATCH1_REG + regoffset, &value);
 317                 if (status < 0 || value == 0)
 318                         continue;
 319
 320                 do {
 321                         int bit = __ffs(value);
 322                         int line = i * 8 + bit;
 323
 324                         handle_nested_irq(ab8500->irq_base + line);
 325                         value &= ~(1 << bit);
 326                 } while (value);
 327         }
 328
 329         return IRQ_HANDLED;
 330 }
 331
 332 static int ab8500_irq_init(struct ab8500 *ab8500)
 333 {
 334         int base = ab8500->irq_base;
 335         int irq;
 336
 337         for (irq = base; irq < base + AB8500_NR_IRQS; irq++) {
 338                 irq_set_chip_data(irq, ab8500);
 339                 irq_set_chip_and_handler(irq, &ab8500_irq_chip,
 340                                          handle_simple_irq);
 341                 irq_set_nested_thread(irq, 1);
 342 #ifdef CONFIG_ARM
 343                 set_irq_flags(irq, IRQF_VALID);
 344 #else
 345                 irq_set_noprobe(irq);
 346 #endif
 347         }
 348
 349         return 0;
 350 }
 351
 352 static void ab8500_irq_remove(struct ab8500 *ab8500)
 353 {
 354         int base = ab8500->irq_base;
 355         int irq;
 356
 357         for (irq = base; irq < base + AB8500_NR_IRQS; irq++) {
 358 #ifdef CONFIG_ARM
 359                 set_irq_flags(irq, 0);
 360 #endif
 361                 irq_set_chip_and_handler(irq, NULL, NULL);
 362                 irq_set_chip_data(irq, NULL);
 363         }
 364 }
 365
 366 static struct resource ab8500_gpio_resources[] = {
 367         {
 368                 .name   = "GPIO_INT6",
 369                 .start  = AB8500_INT_GPIO6R,
 370                 .end    = AB8500_INT_GPIO41F,
 371                 .flags  = IORESOURCE_IRQ,
 372         }
 373 };
 374
 375 static struct resource ab8500_gpadc_resources[] = {
 376         {
 377                 .name   = "HW_CONV_END",
 378                 .start  = AB8500_INT_GP_HW_ADC_CONV_END,
 379                 .end    = AB8500_INT_GP_HW_ADC_CONV_END,
 380                 .flags  = IORESOURCE_IRQ,
 381         },
 382         {
 383                 .name   = "SW_CONV_END",
 384                 .start  = AB8500_INT_GP_SW_ADC_CONV_END,
 385                 .end    = AB8500_INT_GP_SW_ADC_CONV_END,
 386                 .flags  = IORESOURCE_IRQ,
 387         },
 388 };
 389
 390 static struct resource ab8500_rtc_resources[] = {
 391         {
 392                 .name   = "60S",
 393                 .start  = AB8500_INT_RTC_60S,
 394                 .end    = AB8500_INT_RTC_60S,
 395                 .flags  = IORESOURCE_IRQ,
 396         },
 397         {
 398                 .name   = "ALARM",
 399                 .start  = AB8500_INT_RTC_ALARM,
 400                 .end    = AB8500_INT_RTC_ALARM,
 401                 .flags  = IORESOURCE_IRQ,
 402         },
 403 };
 404
 405 static struct resource ab8500_poweronkey_db_resources[] = {
 406         {
 407                 .name   = "ONKEY_DBF",
 408                 .start  = AB8500_INT_PON_KEY1DB_F,
 409                 .end    = AB8500_INT_PON_KEY1DB_F,
 410                 .flags  = IORESOURCE_IRQ,
 411         },
 412         {
 413                 .name   = "ONKEY_DBR",
 414                 .start  = AB8500_INT_PON_KEY1DB_R,
 415                 .end    = AB8500_INT_PON_KEY1DB_R,
 416                 .flags  = IORESOURCE_IRQ,
 417         },
 418 };
 419
 420 static struct resource ab8500_bm_resources[] = {
 421         {
 422                 .name = "MAIN_EXT_CH_NOT_OK",
 423                 .start = AB8500_INT_MAIN_EXT_CH_NOT_OK,
 424                 .end = AB8500_INT_MAIN_EXT_CH_NOT_OK,
 425                 .flags = IORESOURCE_IRQ,
 426         },
 427         {
 428                 .name = "BATT_OVV",
 429                 .start = AB8500_INT_BATT_OVV,
 430                 .end = AB8500_INT_BATT_OVV,
 431                 .flags = IORESOURCE_IRQ,
 432         },
 433         {
 434                 .name = "MAIN_CH_UNPLUG_DET",
 435                 .start = AB8500_INT_MAIN_CH_UNPLUG_DET,
 436                 .end = AB8500_INT_MAIN_CH_UNPLUG_DET,
 437                 .flags = IORESOURCE_IRQ,
 438         },
 439         {
 440                 .name = "MAIN_CHARGE_PLUG_DET",
 441                 .start = AB8500_INT_MAIN_CH_PLUG_DET,
 442                 .end = AB8500_INT_MAIN_CH_PLUG_DET,
 443                 .flags = IORESOURCE_IRQ,
 444         },
 445         {
 446                 .name = "VBUS_DET_F",
 447                 .start = AB8500_INT_VBUS_DET_F,
 448                 .end = AB8500_INT_VBUS_DET_F,
 449                 .flags = IORESOURCE_IRQ,
 450         },
 451         {
 452                 .name = "VBUS_DET_R",
 453                 .start = AB8500_INT_VBUS_DET_R,
 454                 .end = AB8500_INT_VBUS_DET_R,
 455                 .flags = IORESOURCE_IRQ,
 456         },
 457         {
 458                 .name = "BAT_CTRL_INDB",
 459                 .start = AB8500_INT_BAT_CTRL_INDB,
 460                 .end = AB8500_INT_BAT_CTRL_INDB,
 461                 .flags = IORESOURCE_IRQ,
 462         },
 463         {
 464                 .name = "CH_WD_EXP",
 465                 .start = AB8500_INT_CH_WD_EXP,
 466                 .end = AB8500_INT_CH_WD_EXP,
 467                 .flags = IORESOURCE_IRQ,
 468         },
 469         {
 470                 .name = "VBUS_OVV",
 471                 .start = AB8500_INT_VBUS_OVV,
 472                 .end = AB8500_INT_VBUS_OVV,
 473                 .flags = IORESOURCE_IRQ,
 474         },
 475         {
 476                 .name = "NCONV_ACCU",
 477                 .start = AB8500_INT_CCN_CONV_ACC,
 478                 .end = AB8500_INT_CCN_CONV_ACC,
 479                 .flags = IORESOURCE_IRQ,
 480         },
 481         {
 482                 .name = "LOW_BAT_F",
 483                 .start = AB8500_INT_LOW_BAT_F,
 484                 .end = AB8500_INT_LOW_BAT_F,
 485                 .flags = IORESOURCE_IRQ,
 486         },
 487         {
 488                 .name = "LOW_BAT_R",
 489                 .start = AB8500_INT_LOW_BAT_R,
 490                 .end = AB8500_INT_LOW_BAT_R,
 491                 .flags = IORESOURCE_IRQ,
 492         },
 493         {
 494                 .name = "BTEMP_LOW",
 495                 .start = AB8500_INT_BTEMP_LOW,
 496                 .end = AB8500_INT_BTEMP_LOW,
 497                 .flags = IORESOURCE_IRQ,
 498         },
 499         {
 500                 .name = "BTEMP_HIGH",
 501                 .start = AB8500_INT_BTEMP_HIGH,
 502                 .end = AB8500_INT_BTEMP_HIGH,
 503                 .flags = IORESOURCE_IRQ,
 504         },
 505         {
 506                 .name = "USB_CHARGER_NOT_OKR",
 507                 .start = AB8500_INT_USB_CHARGER_NOT_OK,
 508                 .end = AB8500_INT_USB_CHARGER_NOT_OK,
 509                 .flags = IORESOURCE_IRQ,
 510         },
 511         {
 512                 .name = "USB_CHARGE_DET_DONE",
 513                 .start = AB8500_INT_USB_CHG_DET_DONE,
 514                 .end = AB8500_INT_USB_CHG_DET_DONE,
 515                 .flags = IORESOURCE_IRQ,
 516         },
 517         {
 518                 .name = "USB_CH_TH_PROT_R",
 519                 .start = AB8500_INT_USB_CH_TH_PROT_R,
 520                 .end = AB8500_INT_USB_CH_TH_PROT_R,
 521                 .flags = IORESOURCE_IRQ,
 522         },
 523         {
 524                 .name = "MAIN_CH_TH_PROT_R",
 525                 .start = AB8500_INT_MAIN_CH_TH_PROT_R,
 526                 .end = AB8500_INT_MAIN_CH_TH_PROT_R,
 527                 .flags = IORESOURCE_IRQ,
 528         },
 529         {
 530                 .name = "USB_CHARGER_NOT_OKF",
 531                 .start = AB8500_INT_USB_CHARGER_NOT_OKF,
 532                 .end = AB8500_INT_USB_CHARGER_NOT_OKF,
 533                 .flags = IORESOURCE_IRQ,
 534         },
 535 };
 536
 537 static struct resource ab8500_debug_resources[] = {
 538         {
 539                 .name   = "IRQ_FIRST",
 540                 .start  = AB8500_INT_MAIN_EXT_CH_NOT_OK,
 541                 .end    = AB8500_INT_MAIN_EXT_CH_NOT_OK,
 542                 .flags  = IORESOURCE_IRQ,
 543         },
 544         {
 545                 .name   = "IRQ_LAST",
 546                 .start  = AB8500_INT_USB_CHARGER_NOT_OKF,
 547                 .end    = AB8500_INT_USB_CHARGER_NOT_OKF,
 548                 .flags  = IORESOURCE_IRQ,
 549         },
 550 };
 551
 552 static struct resource ab8500_usb_resources[] = {
 553         {
 554                 .name = "ID_WAKEUP_R",
 555                 .start = AB8500_INT_ID_WAKEUP_R,
 556                 .end = AB8500_INT_ID_WAKEUP_R,
 557                 .flags = IORESOURCE_IRQ,
 558         },
 559         {
 560                 .name = "ID_WAKEUP_F",
 561                 .start = AB8500_INT_ID_WAKEUP_F,
 562                 .end = AB8500_INT_ID_WAKEUP_F,
 563                 .flags = IORESOURCE_IRQ,
 564         },
 565         {
 566                 .name = "VBUS_DET_F",
 567                 .start = AB8500_INT_VBUS_DET_F,
 568                 .end = AB8500_INT_VBUS_DET_F,
 569                 .flags = IORESOURCE_IRQ,
 570         },
 571         {
 572                 .name = "VBUS_DET_R",
 573                 .start = AB8500_INT_VBUS_DET_R,
 574                 .end = AB8500_INT_VBUS_DET_R,
 575                 .flags = IORESOURCE_IRQ,
 576         },
 577         {
 578                 .name = "USB_LINK_STATUS",
 579                 .start = AB8500_INT_USB_LINK_STATUS,
 580                 .end = AB8500_INT_USB_LINK_STATUS,
 581                 .flags = IORESOURCE_IRQ,
 582         },
 583 };
 584
 585 static struct resource ab8500_temp_resources[] = {
 586         {
 587                 .name  = "AB8500_TEMP_WARM",
 588                 .start = AB8500_INT_TEMP_WARM,
 589                 .end   = AB8500_INT_TEMP_WARM,
 590                 .flags = IORESOURCE_IRQ,
 591         },
 592 };
 593
 594 static struct mfd_cell ab8500_devs[] = {
 595 #ifdef CONFIG_DEBUG_FS
 596         {
 597                 .name = "ab8500-debug",
 598                 .num_resources = ARRAY_SIZE(ab8500_debug_resources),
 599                 .resources = ab8500_debug_resources,
 600         },
 601 #endif
 602         {
 603                 .name = "ab8500-sysctrl",
 604         },
 605         {
 606                 .name = "ab8500-regulator",
 607         },
 608         {
 609                 .name = "ab8500-gpio",
 610                 .num_resources = ARRAY_SIZE(ab8500_gpio_resources),
 611                 .resources = ab8500_gpio_resources,
 612         },
 613         {
 614                 .name = "ab8500-gpadc",
 615                 .num_resources = ARRAY_SIZE(ab8500_gpadc_resources),
 616                 .resources = ab8500_gpadc_resources,
 617         },
 618         {
 619                 .name = "ab8500-rtc",
 620                 .num_resources = ARRAY_SIZE(ab8500_rtc_resources),
 621                 .resources = ab8500_rtc_resources,
 622         },
 623         {
 624                 .name = "ab8500-bm",
 625                 .num_resources = ARRAY_SIZE(ab8500_bm_resources),
 626                 .resources = ab8500_bm_resources,
 627         },
 628         { .name = "ab8500-codec", },
 629         {
 630                 .name = "ab8500-usb",
 631                 .num_resources = ARRAY_SIZE(ab8500_usb_resources),
 632                 .resources = ab8500_usb_resources,
 633         },
 634         {
 635                 .name = "ab8500-poweron-key",
 636                 .num_resources = ARRAY_SIZE(ab8500_poweronkey_db_resources),
 637                 .resources = ab8500_poweronkey_db_resources,
 638         },
 639         {
 640                 .name = "ab8500-pwm",
 641                 .id = 1,
 642         },
 643         {
 644                 .name = "ab8500-pwm",
 645                 .id = 2,
 646         },
 647         {
 648                 .name = "ab8500-pwm",
 649                 .id = 3,
 650         },
 651         { .name = "ab8500-leds", },
 652         {
 653                 .name = "ab8500-denc",
 654         },
 655         {
 656                 .name = "ab8500-temp",
 657                 .num_resources = ARRAY_SIZE(ab8500_temp_resources),
 658                 .resources = ab8500_temp_resources,
 659         },
 660 };
 661
 662 static ssize_t show_chip_id(struct device *dev,
 663                                 struct device_attribute *attr, char *buf)
 664 {
 665         struct ab8500 *ab8500;
 666
 667         ab8500 = dev_get_drvdata(dev);
 668         return sprintf(buf, "%#x\n", ab8500 ? ab8500->chip_id : -EINVAL);
 669 }
 670
 671 /*
 672  * ab8500 has switched off due to (SWITCH_OFF_STATUS):
 673  * 0x01 Swoff bit programming
 674  * 0x02 Thermal protection activation
 675  * 0x04 Vbat lower then BattOk falling threshold
 676  * 0x08 Watchdog expired
 677  * 0x10 Non presence of 32kHz clock
 678  * 0x20 Battery level lower than power on reset threshold
 679  * 0x40 Power on key 1 pressed longer than 10 seconds
 680  * 0x80 DB8500 thermal shutdown
 681  */
 682 static ssize_t show_switch_off_status(struct device *dev,
 683                                 struct device_attribute *attr, char *buf)
 684 {
 685         int ret;
 686         u8 value;
 687         struct ab8500 *ab8500;
 688
 689         ab8500 = dev_get_drvdata(dev);
 690         ret = get_register_interruptible(ab8500, AB8500_RTC,
 691                 AB8500_SWITCH_OFF_STATUS, &value);
 692         if (ret < 0)
 693                 return ret;
 694         return sprintf(buf, "%#x\n", value);
 695 }
 696
 697 static DEVICE_ATTR(chip_id, S_IRUGO, show_chip_id, NULL);
 698 static DEVICE_ATTR(switch_off_status, S_IRUGO, show_switch_off_status, NULL);
 699
 700 static struct attribute *ab8500_sysfs_entries[] = {
 701         &dev_attr_chip_id.attr,
 702         &dev_attr_switch_off_status.attr,
 703         NULL,
 704 };
 705
 706 static struct attribute_group ab8500_attr_group = {
 707         .attrs  = ab8500_sysfs_entries,
 708 };
 709
 710 int __devinit ab8500_init(struct ab8500 *ab8500)
 711 {
 712         struct ab8500_platform_data *plat = dev_get_platdata(ab8500->dev);
 713         int ret;
 714         int i;
 715         u8 value;
 716
 717         if (plat)
 718                 ab8500->irq_base = plat->irq_base;
 719
 720         mutex_init(&ab8500->lock);
 721         mutex_init(&ab8500->irq_lock);
 722
 723         ret = get_register_interruptible(ab8500, AB8500_MISC,
 724                 AB8500_REV_REG, &value);
 725         if (ret < 0)
 726                 return ret;
 727
 728         switch (value) {
 729         case AB8500_CUTEARLY:
 730         case AB8500_CUT1P0:
 731         case AB8500_CUT1P1:
 732         case AB8500_CUT2P0:
 733         case AB8500_CUT3P0:
 734                 dev_info(ab8500->dev, "detected chip, revision: %#x\n", value);
 735                 break;
 736         default:
 737                 dev_err(ab8500->dev, "unknown chip, revision: %#x\n", value);
 738                 return -EINVAL;
 739         }
 740         ab8500->chip_id = value;
 741
 742         /*
 743          * ab8500 has switched off due to (SWITCH_OFF_STATUS):
 744          * 0x01 Swoff bit programming
 745          * 0x02 Thermal protection activation
 746          * 0x04 Vbat lower then BattOk falling threshold
 747          * 0x08 Watchdog expired
 748          * 0x10 Non presence of 32kHz clock
 749          * 0x20 Battery level lower than power on reset threshold
 750          * 0x40 Power on key 1 pressed longer than 10 seconds
 751          * 0x80 DB8500 thermal shutdown
 752          */
 753
 754         ret = get_register_interruptible(ab8500, AB8500_RTC,
 755                 AB8500_SWITCH_OFF_STATUS, &value);
 756         if (ret < 0)
 757                 return ret;
 758         dev_info(ab8500->dev, "switch off status: %#x", value);
 759
 760         if (plat && plat->init)
 761                 plat->init(ab8500);
 762
 763         /* Clear and mask all interrupts */
 764         for (i = 0; i < AB8500_NUM_IRQ_REGS; i++) {
 765                 /* Interrupt register 12 doesn't exist prior to version 2.0 */
 766                 if (ab8500_irq_regoffset[i] == 11 &&
 767                         ab8500->chip_id < AB8500_CUT2P0)
 768                         continue;
 769
 770                 get_register_interruptible(ab8500, AB8500_INTERRUPT,
 771                         AB8500_IT_LATCH1_REG + ab8500_irq_regoffset[i],
 772                         &value);
 773                 set_register_interruptible(ab8500, AB8500_INTERRUPT,
 774                         AB8500_IT_MASK1_REG + ab8500_irq_regoffset[i], 0xff);
 775         }
 776
 777         ret = abx500_register_ops(ab8500->dev, &ab8500_ops);
 778         if (ret)
 779                 return ret;
 780
 781         for (i = 0; i < AB8500_NUM_IRQ_REGS; i++)
 782                 ab8500->mask[i] = ab8500->oldmask[i] = 0xff;
 783
 784         if (ab8500->irq_base) {
 785                 ret = ab8500_irq_init(ab8500);
 786                 if (ret)
 787                         return ret;
 788
 789                 ret = request_threaded_irq(ab8500->irq, NULL, ab8500_irq,
 790                                            IRQF_ONESHOT | IRQF_NO_SUSPEND,
 791                                            "ab8500", ab8500);
 792                 if (ret)
 793                         goto out_removeirq;
 794         }
 795
 796         ret = mfd_add_devices(ab8500->dev, 0, ab8500_devs,
 797                               ARRAY_SIZE(ab8500_devs), NULL,
 798                               ab8500->irq_base);
 799         if (ret)
 800                 goto out_freeirq;
 801
 802         ret = sysfs_create_group(&ab8500->dev->kobj, &ab8500_attr_group);
 803         if (ret)
 804                 dev_err(ab8500->dev, "error creating sysfs entries\n");
 805
 806         return ret;
 807
 808 out_freeirq:
 809         if (ab8500->irq_base) {
 810                 free_irq(ab8500->irq, ab8500);
 811 out_removeirq:
 812                 ab8500_irq_remove(ab8500);
 813         }
 814         return ret;
 815 }
 816
 817 int __devexit ab8500_exit(struct ab8500 *ab8500)
 818 {
 819         sysfs_remove_group(&ab8500->dev->kobj, &ab8500_attr_group);
 820         mfd_remove_devices(ab8500->dev);
 821         if (ab8500->irq_base) {
 822                 free_irq(ab8500->irq, ab8500);
 823                 ab8500_irq_remove(ab8500);
 824         }
 825
 826         return 0;
 827 }
 828
 829 MODULE_AUTHOR("Mattias Wallin, Srinidhi Kasagar, Rabin Vincent");
 830 MODULE_DESCRIPTION("AB8500 MFD core");
 831 MODULE_LICENSE("GPL v2");