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 does'nt exist prior to version 0x20 */
 258                 if (ab8500_irq_regoffset[i] == 11 && ab8500->chip_id < 0x20)
 259                         continue;
 260
 261                 ab8500->oldmask[i] = new;
 262
 263                 reg = AB8500_IT_MASK1_REG + ab8500_irq_regoffset[i];
 264                 set_register_interruptible(ab8500, AB8500_INTERRUPT, reg, new);
 265         }
 266
 267         mutex_unlock(&ab8500->irq_lock);
 268 }
 269
 270 static void ab8500_irq_mask(struct irq_data *data)
 271 {
 272         struct ab8500 *ab8500 = irq_data_get_irq_chip_data(data);
 273         int offset = data->irq - ab8500->irq_base;
 274         int index = offset / 8;
 275         int mask = 1 << (offset % 8);
 276
 277         ab8500->mask[index] |= mask;
 278 }
 279
 280 static void ab8500_irq_unmask(struct irq_data *data)
 281 {
 282         struct ab8500 *ab8500 = irq_data_get_irq_chip_data(data);
 283         int offset = data->irq - ab8500->irq_base;
 284         int index = offset / 8;
 285         int mask = 1 << (offset % 8);
 286
 287         ab8500->mask[index] &= ~mask;
 288 }
 289
 290 static struct irq_chip ab8500_irq_chip = {
 291         .name                   = "ab8500",
 292         .irq_bus_lock           = ab8500_irq_lock,
 293         .irq_bus_sync_unlock    = ab8500_irq_sync_unlock,
 294         .irq_mask               = ab8500_irq_mask,
 295         .irq_unmask             = ab8500_irq_unmask,
 296 };
 297
 298 static irqreturn_t ab8500_irq(int irq, void *dev)
 299 {
 300         struct ab8500 *ab8500 = dev;
 301         int i;
 302
 303         dev_vdbg(ab8500->dev, "interrupt\n");
 304
 305         for (i = 0; i < AB8500_NUM_IRQ_REGS; i++) {
 306                 int regoffset = ab8500_irq_regoffset[i];
 307                 int status;
 308                 u8 value;
 309
 310                 /* Interrupt register 12 does'nt exist prior to version 0x20 */
 311                 if (regoffset == 11 && ab8500->chip_id < 0x20)
 312                         continue;
 313
 314                 status = get_register_interruptible(ab8500, AB8500_INTERRUPT,
 315                         AB8500_IT_LATCH1_REG + regoffset, &value);
 316                 if (status < 0 || value == 0)
 317                         continue;
 318
 319                 do {
 320                         int bit = __ffs(value);
 321                         int line = i * 8 + bit;
 322
 323                         handle_nested_irq(ab8500->irq_base + line);
 324                         value &= ~(1 << bit);
 325                 } while (value);
 326         }
 327
 328         return IRQ_HANDLED;
 329 }
 330
 331 static int ab8500_irq_init(struct ab8500 *ab8500)
 332 {
 333         int base = ab8500->irq_base;
 334         int irq;
 335
 336         for (irq = base; irq < base + AB8500_NR_IRQS; irq++) {
 337                 irq_set_chip_data(irq, ab8500);
 338                 irq_set_chip_and_handler(irq, &ab8500_irq_chip,
 339                                          handle_simple_irq);
 340                 irq_set_nested_thread(irq, 1);
 341 #ifdef CONFIG_ARM
 342                 set_irq_flags(irq, IRQF_VALID);
 343 #else
 344                 irq_set_noprobe(irq);
 345 #endif
 346         }
 347
 348         return 0;
 349 }
 350
 351 static void ab8500_irq_remove(struct ab8500 *ab8500)
 352 {
 353         int base = ab8500->irq_base;
 354         int irq;
 355
 356         for (irq = base; irq < base + AB8500_NR_IRQS; irq++) {
 357 #ifdef CONFIG_ARM
 358                 set_irq_flags(irq, 0);
 359 #endif
 360                 irq_set_chip_and_handler(irq, NULL, NULL);
 361                 irq_set_chip_data(irq, NULL);
 362         }
 363 }
 364
 365 static struct resource ab8500_gpio_resources[] = {
 366         {
 367                 .name   = "GPIO_INT6",
 368                 .start  = AB8500_INT_GPIO6R,
 369                 .end    = AB8500_INT_GPIO41F,
 370                 .flags  = IORESOURCE_IRQ,
 371         }
 372 };
 373
 374 static struct resource ab8500_gpadc_resources[] = {
 375         {
 376                 .name   = "HW_CONV_END",
 377                 .start  = AB8500_INT_GP_HW_ADC_CONV_END,
 378                 .end    = AB8500_INT_GP_HW_ADC_CONV_END,
 379                 .flags  = IORESOURCE_IRQ,
 380         },
 381         {
 382                 .name   = "SW_CONV_END",
 383                 .start  = AB8500_INT_GP_SW_ADC_CONV_END,
 384                 .end    = AB8500_INT_GP_SW_ADC_CONV_END,
 385                 .flags  = IORESOURCE_IRQ,
 386         },
 387 };
 388
 389 static struct resource ab8500_rtc_resources[] = {
 390         {
 391                 .name   = "60S",
 392                 .start  = AB8500_INT_RTC_60S,
 393                 .end    = AB8500_INT_RTC_60S,
 394                 .flags  = IORESOURCE_IRQ,
 395         },
 396         {
 397                 .name   = "ALARM",
 398                 .start  = AB8500_INT_RTC_ALARM,
 399                 .end    = AB8500_INT_RTC_ALARM,
 400                 .flags  = IORESOURCE_IRQ,
 401         },
 402 };
 403
 404 static struct resource ab8500_poweronkey_db_resources[] = {
 405         {
 406                 .name   = "ONKEY_DBF",
 407                 .start  = AB8500_INT_PON_KEY1DB_F,
 408                 .end    = AB8500_INT_PON_KEY1DB_F,
 409                 .flags  = IORESOURCE_IRQ,
 410         },
 411         {
 412                 .name   = "ONKEY_DBR",
 413                 .start  = AB8500_INT_PON_KEY1DB_R,
 414                 .end    = AB8500_INT_PON_KEY1DB_R,
 415                 .flags  = IORESOURCE_IRQ,
 416         },
 417 };
 418
 419 static struct resource ab8500_bm_resources[] = {
 420         {
 421                 .name = "MAIN_EXT_CH_NOT_OK",
 422                 .start = AB8500_INT_MAIN_EXT_CH_NOT_OK,
 423                 .end = AB8500_INT_MAIN_EXT_CH_NOT_OK,
 424                 .flags = IORESOURCE_IRQ,
 425         },
 426         {
 427                 .name = "BATT_OVV",
 428                 .start = AB8500_INT_BATT_OVV,
 429                 .end = AB8500_INT_BATT_OVV,
 430                 .flags = IORESOURCE_IRQ,
 431         },
 432         {
 433                 .name = "MAIN_CH_UNPLUG_DET",
 434                 .start = AB8500_INT_MAIN_CH_UNPLUG_DET,
 435                 .end = AB8500_INT_MAIN_CH_UNPLUG_DET,
 436                 .flags = IORESOURCE_IRQ,
 437         },
 438         {
 439                 .name = "MAIN_CHARGE_PLUG_DET",
 440                 .start = AB8500_INT_MAIN_CH_PLUG_DET,
 441                 .end = AB8500_INT_MAIN_CH_PLUG_DET,
 442                 .flags = IORESOURCE_IRQ,
 443         },
 444         {
 445                 .name = "VBUS_DET_F",
 446                 .start = AB8500_INT_VBUS_DET_F,
 447                 .end = AB8500_INT_VBUS_DET_F,
 448                 .flags = IORESOURCE_IRQ,
 449         },
 450         {
 451                 .name = "VBUS_DET_R",
 452                 .start = AB8500_INT_VBUS_DET_R,
 453                 .end = AB8500_INT_VBUS_DET_R,
 454                 .flags = IORESOURCE_IRQ,
 455         },
 456         {
 457                 .name = "BAT_CTRL_INDB",
 458                 .start = AB8500_INT_BAT_CTRL_INDB,
 459                 .end = AB8500_INT_BAT_CTRL_INDB,
 460                 .flags = IORESOURCE_IRQ,
 461         },
 462         {
 463                 .name = "CH_WD_EXP",
 464                 .start = AB8500_INT_CH_WD_EXP,
 465                 .end = AB8500_INT_CH_WD_EXP,
 466                 .flags = IORESOURCE_IRQ,
 467         },
 468         {
 469                 .name = "VBUS_OVV",
 470                 .start = AB8500_INT_VBUS_OVV,
 471                 .end = AB8500_INT_VBUS_OVV,
 472                 .flags = IORESOURCE_IRQ,
 473         },
 474         {
 475                 .name = "NCONV_ACCU",
 476                 .start = AB8500_INT_CCN_CONV_ACC,
 477                 .end = AB8500_INT_CCN_CONV_ACC,
 478                 .flags = IORESOURCE_IRQ,
 479         },
 480         {
 481                 .name = "LOW_BAT_F",
 482                 .start = AB8500_INT_LOW_BAT_F,
 483                 .end = AB8500_INT_LOW_BAT_F,
 484                 .flags = IORESOURCE_IRQ,
 485         },
 486         {
 487                 .name = "LOW_BAT_R",
 488                 .start = AB8500_INT_LOW_BAT_R,
 489                 .end = AB8500_INT_LOW_BAT_R,
 490                 .flags = IORESOURCE_IRQ,
 491         },
 492         {
 493                 .name = "BTEMP_LOW",
 494                 .start = AB8500_INT_BTEMP_LOW,
 495                 .end = AB8500_INT_BTEMP_LOW,
 496                 .flags = IORESOURCE_IRQ,
 497         },
 498         {
 499                 .name = "BTEMP_HIGH",
 500                 .start = AB8500_INT_BTEMP_HIGH,
 501                 .end = AB8500_INT_BTEMP_HIGH,
 502                 .flags = IORESOURCE_IRQ,
 503         },
 504         {
 505                 .name = "USB_CHARGER_NOT_OKR",
 506                 .start = AB8500_INT_USB_CHARGER_NOT_OK,
 507                 .end = AB8500_INT_USB_CHARGER_NOT_OK,
 508                 .flags = IORESOURCE_IRQ,
 509         },
 510         {
 511                 .name = "USB_CHARGE_DET_DONE",
 512                 .start = AB8500_INT_USB_CHG_DET_DONE,
 513                 .end = AB8500_INT_USB_CHG_DET_DONE,
 514                 .flags = IORESOURCE_IRQ,
 515         },
 516         {
 517                 .name = "USB_CH_TH_PROT_R",
 518                 .start = AB8500_INT_USB_CH_TH_PROT_R,
 519                 .end = AB8500_INT_USB_CH_TH_PROT_R,
 520                 .flags = IORESOURCE_IRQ,
 521         },
 522         {
 523                 .name = "MAIN_CH_TH_PROT_R",
 524                 .start = AB8500_INT_MAIN_CH_TH_PROT_R,
 525                 .end = AB8500_INT_MAIN_CH_TH_PROT_R,
 526                 .flags = IORESOURCE_IRQ,
 527         },
 528         {
 529                 .name = "USB_CHARGER_NOT_OKF",
 530                 .start = AB8500_INT_USB_CHARGER_NOT_OKF,
 531                 .end = AB8500_INT_USB_CHARGER_NOT_OKF,
 532                 .flags = IORESOURCE_IRQ,
 533         },
 534 };
 535
 536 static struct resource ab8500_debug_resources[] = {
 537         {
 538                 .name   = "IRQ_FIRST",
 539                 .start  = AB8500_INT_MAIN_EXT_CH_NOT_OK,
 540                 .end    = AB8500_INT_MAIN_EXT_CH_NOT_OK,
 541                 .flags  = IORESOURCE_IRQ,
 542         },
 543         {
 544                 .name   = "IRQ_LAST",
 545                 .start  = AB8500_INT_USB_CHARGER_NOT_OKF,
 546                 .end    = AB8500_INT_USB_CHARGER_NOT_OKF,
 547                 .flags  = IORESOURCE_IRQ,
 548         },
 549 };
 550
 551 static struct resource ab8500_usb_resources[] = {
 552         {
 553                 .name = "ID_WAKEUP_R",
 554                 .start = AB8500_INT_ID_WAKEUP_R,
 555                 .end = AB8500_INT_ID_WAKEUP_R,
 556                 .flags = IORESOURCE_IRQ,
 557         },
 558         {
 559                 .name = "ID_WAKEUP_F",
 560                 .start = AB8500_INT_ID_WAKEUP_F,
 561                 .end = AB8500_INT_ID_WAKEUP_F,
 562                 .flags = IORESOURCE_IRQ,
 563         },
 564         {
 565                 .name = "VBUS_DET_F",
 566                 .start = AB8500_INT_VBUS_DET_F,
 567                 .end = AB8500_INT_VBUS_DET_F,
 568                 .flags = IORESOURCE_IRQ,
 569         },
 570         {
 571                 .name = "VBUS_DET_R",
 572                 .start = AB8500_INT_VBUS_DET_R,
 573                 .end = AB8500_INT_VBUS_DET_R,
 574                 .flags = IORESOURCE_IRQ,
 575         },
 576         {
 577                 .name = "USB_LINK_STATUS",
 578                 .start = AB8500_INT_USB_LINK_STATUS,
 579                 .end = AB8500_INT_USB_LINK_STATUS,
 580                 .flags = IORESOURCE_IRQ,
 581         },
 582 };
 583
 584 static struct resource ab8500_temp_resources[] = {
 585         {
 586                 .name  = "AB8500_TEMP_WARM",
 587                 .start = AB8500_INT_TEMP_WARM,
 588                 .end   = AB8500_INT_TEMP_WARM,
 589                 .flags = IORESOURCE_IRQ,
 590         },
 591 };
 592
 593 static struct mfd_cell ab8500_devs[] = {
 594 #ifdef CONFIG_DEBUG_FS
 595         {
 596                 .name = "ab8500-debug",
 597                 .num_resources = ARRAY_SIZE(ab8500_debug_resources),
 598                 .resources = ab8500_debug_resources,
 599         },
 600 #endif
 601         {
 602                 .name = "ab8500-sysctrl",
 603         },
 604         {
 605                 .name = "ab8500-regulator",
 606         },
 607         {
 608                 .name = "ab8500-gpio",
 609                 .num_resources = ARRAY_SIZE(ab8500_gpio_resources),
 610                 .resources = ab8500_gpio_resources,
 611         },
 612         {
 613                 .name = "ab8500-gpadc",
 614                 .num_resources = ARRAY_SIZE(ab8500_gpadc_resources),
 615                 .resources = ab8500_gpadc_resources,
 616         },
 617         {
 618                 .name = "ab8500-rtc",
 619                 .num_resources = ARRAY_SIZE(ab8500_rtc_resources),
 620                 .resources = ab8500_rtc_resources,
 621         },
 622         {
 623                 .name = "ab8500-bm",
 624                 .num_resources = ARRAY_SIZE(ab8500_bm_resources),
 625                 .resources = ab8500_bm_resources,
 626         },
 627         { .name = "ab8500-codec", },
 628         {
 629                 .name = "ab8500-usb",
 630                 .num_resources = ARRAY_SIZE(ab8500_usb_resources),
 631                 .resources = ab8500_usb_resources,
 632         },
 633         {
 634                 .name = "ab8500-poweron-key",
 635                 .num_resources = ARRAY_SIZE(ab8500_poweronkey_db_resources),
 636                 .resources = ab8500_poweronkey_db_resources,
 637         },
 638         {
 639                 .name = "ab8500-pwm",
 640                 .id = 1,
 641         },
 642         {
 643                 .name = "ab8500-pwm",
 644                 .id = 2,
 645         },
 646         {
 647                 .name = "ab8500-pwm",
 648                 .id = 3,
 649         },
 650         { .name = "ab8500-leds", },
 651         {
 652                 .name = "ab8500-denc",
 653         },
 654         {
 655                 .name = "ab8500-temp",
 656                 .num_resources = ARRAY_SIZE(ab8500_temp_resources),
 657                 .resources = ab8500_temp_resources,
 658         },
 659 };
 660
 661 static ssize_t show_chip_id(struct device *dev,
 662                                 struct device_attribute *attr, char *buf)
 663 {
 664         struct ab8500 *ab8500;
 665
 666         ab8500 = dev_get_drvdata(dev);
 667         return sprintf(buf, "%#x\n", ab8500 ? ab8500->chip_id : -EINVAL);
 668 }
 669
 670 /*
 671  * ab8500 has switched off due to (SWITCH_OFF_STATUS):
 672  * 0x01 Swoff bit programming
 673  * 0x02 Thermal protection activation
 674  * 0x04 Vbat lower then BattOk falling threshold
 675  * 0x08 Watchdog expired
 676  * 0x10 Non presence of 32kHz clock
 677  * 0x20 Battery level lower than power on reset threshold
 678  * 0x40 Power on key 1 pressed longer than 10 seconds
 679  * 0x80 DB8500 thermal shutdown
 680  */
 681 static ssize_t show_switch_off_status(struct device *dev,
 682                                 struct device_attribute *attr, char *buf)
 683 {
 684         int ret;
 685         u8 value;
 686         struct ab8500 *ab8500;
 687
 688         ab8500 = dev_get_drvdata(dev);
 689         ret = get_register_interruptible(ab8500, AB8500_RTC,
 690                 AB8500_SWITCH_OFF_STATUS, &value);
 691         if (ret < 0)
 692                 return ret;
 693         return sprintf(buf, "%#x\n", value);
 694 }
 695
 696 static DEVICE_ATTR(chip_id, S_IRUGO, show_chip_id, NULL);
 697 static DEVICE_ATTR(switch_off_status, S_IRUGO, show_switch_off_status, NULL);
 698
 699 static struct attribute *ab8500_sysfs_entries[] = {
 700         &dev_attr_chip_id.attr,
 701         &dev_attr_switch_off_status.attr,
 702         NULL,
 703 };
 704
 705 static struct attribute_group ab8500_attr_group = {
 706         .attrs  = ab8500_sysfs_entries,
 707 };
 708
 709 int __devinit ab8500_init(struct ab8500 *ab8500)
 710 {
 711         struct ab8500_platform_data *plat = dev_get_platdata(ab8500->dev);
 712         int ret;
 713         int i;
 714         u8 value;
 715
 716         if (plat)
 717                 ab8500->irq_base = plat->irq_base;
 718
 719         mutex_init(&ab8500->lock);
 720         mutex_init(&ab8500->irq_lock);
 721
 722         ret = get_register_interruptible(ab8500, AB8500_MISC,
 723                 AB8500_REV_REG, &value);
 724         if (ret < 0)
 725                 return ret;
 726
 727         /*
 728          * 0x0 - Early Drop
 729          * 0x10 - Cut 1.0
 730          * 0x11 - Cut 1.1
 731          * 0x20 - Cut 2.0
 732          * 0x30 - Cut 3.0
 733          */
 734         if (value == 0x0 || value == 0x10 || value == 0x11 || value == 0x20 ||
 735                 value == 0x30) {
 736                 dev_info(ab8500->dev, "detected chip, revision: %#x\n", value);
 737         } else {
 738                 dev_err(ab8500->dev, "unknown chip, revision: %#x\n", value);
 739                 return -EINVAL;
 740         }
 741         ab8500->chip_id = value;
 742
 743         /*
 744          * ab8500 has switched off due to (SWITCH_OFF_STATUS):
 745          * 0x01 Swoff bit programming
 746          * 0x02 Thermal protection activation
 747          * 0x04 Vbat lower then BattOk falling threshold
 748          * 0x08 Watchdog expired
 749          * 0x10 Non presence of 32kHz clock
 750          * 0x20 Battery level lower than power on reset threshold
 751          * 0x40 Power on key 1 pressed longer than 10 seconds
 752          * 0x80 DB8500 thermal shutdown
 753          */
 754
 755         ret = get_register_interruptible(ab8500, AB8500_RTC,
 756                 AB8500_SWITCH_OFF_STATUS, &value);
 757         if (ret < 0)
 758                 return ret;
 759         dev_info(ab8500->dev, "switch off status: %#x", value);
 760
 761         if (plat && plat->init)
 762                 plat->init(ab8500);
 763
 764         /* Clear and mask all interrupts */
 765         for (i = 0; i < AB8500_NUM_IRQ_REGS; i++) {
 766                 /* Interrupt register 12 does'nt exist prior to version 0x20 */
 767                 if (ab8500_irq_regoffset[i] == 11 && ab8500->chip_id < 0x20)
 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");