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  * Changes: 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_LATCH19_REG           0x32
  56 #define AB8500_IT_LATCH20_REG           0x33
  57 #define AB8500_IT_LATCH21_REG           0x34
  58 #define AB8500_IT_LATCH22_REG           0x35
  59 #define AB8500_IT_LATCH23_REG           0x36
  60 #define AB8500_IT_LATCH24_REG           0x37
  61
  62 /*
  63  * mask registers
  64  */
  65
  66 #define AB8500_IT_MASK1_REG             0x40
  67 #define AB8500_IT_MASK2_REG             0x41
  68 #define AB8500_IT_MASK3_REG             0x42
  69 #define AB8500_IT_MASK4_REG             0x43
  70 #define AB8500_IT_MASK5_REG             0x44
  71 #define AB8500_IT_MASK6_REG             0x45
  72 #define AB8500_IT_MASK7_REG             0x46
  73 #define AB8500_IT_MASK8_REG             0x47
  74 #define AB8500_IT_MASK9_REG             0x48
  75 #define AB8500_IT_MASK10_REG            0x49
  76 #define AB8500_IT_MASK11_REG            0x4A
  77 #define AB8500_IT_MASK12_REG            0x4B
  78 #define AB8500_IT_MASK13_REG            0x4C
  79 #define AB8500_IT_MASK14_REG            0x4D
  80 #define AB8500_IT_MASK15_REG            0x4E
  81 #define AB8500_IT_MASK16_REG            0x4F
  82 #define AB8500_IT_MASK17_REG            0x50
  83 #define AB8500_IT_MASK18_REG            0x51
  84 #define AB8500_IT_MASK19_REG            0x52
  85 #define AB8500_IT_MASK20_REG            0x53
  86 #define AB8500_IT_MASK21_REG            0x54
  87 #define AB8500_IT_MASK22_REG            0x55
  88 #define AB8500_IT_MASK23_REG            0x56
  89 #define AB8500_IT_MASK24_REG            0x57
  90
  91 #define AB8500_REV_REG                  0x80
  92
  93 /*
  94  * Map interrupt numbers to the LATCH and MASK register offsets, Interrupt
  95  * numbers are indexed into this array with (num / 8).
  96  *
  97  * This is one off from the register names, i.e. AB8500_IT_MASK1_REG is at
  98  * offset 0.
  99  */
 100 static const int ab8500_irq_regoffset[AB8500_NUM_IRQ_REGS] = {
 101         0, 1, 2, 3, 4, 6, 7, 8, 9, 18, 19, 20, 21,
 102 };
 103
 104 static int ab8500_get_chip_id(struct device *dev)
 105 {
 106         struct ab8500 *ab8500;
 107
 108         if (!dev)
 109                 return -EINVAL;
 110         ab8500 = dev_get_drvdata(dev->parent);
 111         return ab8500 ? (int)ab8500->chip_id : -EINVAL;
 112 }
 113
 114 static int set_register_interruptible(struct ab8500 *ab8500, u8 bank,
 115         u8 reg, u8 data)
 116 {
 117         int ret;
 118         /*
 119          * Put the u8 bank and u8 register together into a an u16.
 120          * The bank on higher 8 bits and register in lower 8 bits.
 121          * */
 122         u16 addr = ((u16)bank) << 8 | reg;
 123
 124         dev_vdbg(ab8500->dev, "wr: addr %#x <= %#x\n", addr, data);
 125
 126         ret = mutex_lock_interruptible(&ab8500->lock);
 127         if (ret)
 128                 return ret;
 129
 130         ret = ab8500->write(ab8500, addr, data);
 131         if (ret < 0)
 132                 dev_err(ab8500->dev, "failed to write reg %#x: %d\n",
 133                         addr, ret);
 134         mutex_unlock(&ab8500->lock);
 135
 136         return ret;
 137 }
 138
 139 static int ab8500_set_register(struct device *dev, u8 bank,
 140         u8 reg, u8 value)
 141 {
 142         struct ab8500 *ab8500 = dev_get_drvdata(dev->parent);
 143
 144         return set_register_interruptible(ab8500, bank, reg, value);
 145 }
 146
 147 static int get_register_interruptible(struct ab8500 *ab8500, u8 bank,
 148         u8 reg, u8 *value)
 149 {
 150         int ret;
 151         /* put the u8 bank and u8 reg together into a an u16.
 152          * bank on higher 8 bits and reg in lower */
 153         u16 addr = ((u16)bank) << 8 | reg;
 154
 155         ret = mutex_lock_interruptible(&ab8500->lock);
 156         if (ret)
 157                 return ret;
 158
 159         ret = ab8500->read(ab8500, addr);
 160         if (ret < 0)
 161                 dev_err(ab8500->dev, "failed to read reg %#x: %d\n",
 162                         addr, ret);
 163         else
 164                 *value = ret;
 165
 166         mutex_unlock(&ab8500->lock);
 167         dev_vdbg(ab8500->dev, "rd: addr %#x => data %#x\n", addr, ret);
 168
 169         return ret;
 170 }
 171
 172 static int ab8500_get_register(struct device *dev, u8 bank,
 173         u8 reg, u8 *value)
 174 {
 175         struct ab8500 *ab8500 = dev_get_drvdata(dev->parent);
 176
 177         return get_register_interruptible(ab8500, bank, reg, value);
 178 }
 179
 180 static int mask_and_set_register_interruptible(struct ab8500 *ab8500, u8 bank,
 181         u8 reg, u8 bitmask, u8 bitvalues)
 182 {
 183         int ret;
 184         u8 data;
 185         /* put the u8 bank and u8 reg together into a an u16.
 186          * bank on higher 8 bits and reg in lower */
 187         u16 addr = ((u16)bank) << 8 | reg;
 188
 189         ret = mutex_lock_interruptible(&ab8500->lock);
 190         if (ret)
 191                 return ret;
 192
 193         ret = ab8500->read(ab8500, addr);
 194         if (ret < 0) {
 195                 dev_err(ab8500->dev, "failed to read reg %#x: %d\n",
 196                         addr, ret);
 197                 goto out;
 198         }
 199
 200         data = (u8)ret;
 201         data = (~bitmask & data) | (bitmask & bitvalues);
 202
 203         ret = ab8500->write(ab8500, addr, data);
 204         if (ret < 0)
 205                 dev_err(ab8500->dev, "failed to write reg %#x: %d\n",
 206                         addr, ret);
 207
 208         dev_vdbg(ab8500->dev, "mask: addr %#x => data %#x\n", addr, data);
 209 out:
 210         mutex_unlock(&ab8500->lock);
 211         return ret;
 212 }
 213
 214 static int ab8500_mask_and_set_register(struct device *dev,
 215         u8 bank, u8 reg, u8 bitmask, u8 bitvalues)
 216 {
 217         struct ab8500 *ab8500 = dev_get_drvdata(dev->parent);
 218
 219         return mask_and_set_register_interruptible(ab8500, bank, reg,
 220                 bitmask, bitvalues);
 221
 222 }
 223
 224 static struct abx500_ops ab8500_ops = {
 225         .get_chip_id = ab8500_get_chip_id,
 226         .get_register = ab8500_get_register,
 227         .set_register = ab8500_set_register,
 228         .get_register_page = NULL,
 229         .set_register_page = NULL,
 230         .mask_and_set_register = ab8500_mask_and_set_register,
 231         .event_registers_startup_state_get = NULL,
 232         .startup_irq_enabled = NULL,
 233 };
 234
 235 static void ab8500_irq_lock(struct irq_data *data)
 236 {
 237         struct ab8500 *ab8500 = irq_data_get_irq_chip_data(data);
 238
 239         mutex_lock(&ab8500->irq_lock);
 240 }
 241
 242 static void ab8500_irq_sync_unlock(struct irq_data *data)
 243 {
 244         struct ab8500 *ab8500 = irq_data_get_irq_chip_data(data);
 245         int i;
 246
 247         for (i = 0; i < AB8500_NUM_IRQ_REGS; i++) {
 248                 u8 old = ab8500->oldmask[i];
 249                 u8 new = ab8500->mask[i];
 250                 int reg;
 251
 252                 if (new == old)
 253                         continue;
 254
 255                 ab8500->oldmask[i] = new;
 256
 257                 reg = AB8500_IT_MASK1_REG + ab8500_irq_regoffset[i];
 258                 set_register_interruptible(ab8500, AB8500_INTERRUPT, reg, new);
 259         }
 260
 261         mutex_unlock(&ab8500->irq_lock);
 262 }
 263
 264 static void ab8500_irq_mask(struct irq_data *data)
 265 {
 266         struct ab8500 *ab8500 = irq_data_get_irq_chip_data(data);
 267         int offset = data->irq - ab8500->irq_base;
 268         int index = offset / 8;
 269         int mask = 1 << (offset % 8);
 270
 271         ab8500->mask[index] |= mask;
 272 }
 273
 274 static void ab8500_irq_unmask(struct irq_data *data)
 275 {
 276         struct ab8500 *ab8500 = irq_data_get_irq_chip_data(data);
 277         int offset = data->irq - ab8500->irq_base;
 278         int index = offset / 8;
 279         int mask = 1 << (offset % 8);
 280
 281         ab8500->mask[index] &= ~mask;
 282 }
 283
 284 static struct irq_chip ab8500_irq_chip = {
 285         .name                   = "ab8500",
 286         .irq_bus_lock           = ab8500_irq_lock,
 287         .irq_bus_sync_unlock    = ab8500_irq_sync_unlock,
 288         .irq_mask               = ab8500_irq_mask,
 289         .irq_unmask             = ab8500_irq_unmask,
 290 };
 291
 292 static irqreturn_t ab8500_irq(int irq, void *dev)
 293 {
 294         struct ab8500 *ab8500 = dev;
 295         int i;
 296
 297         dev_vdbg(ab8500->dev, "interrupt\n");
 298
 299         for (i = 0; i < AB8500_NUM_IRQ_REGS; i++) {
 300                 int regoffset = ab8500_irq_regoffset[i];
 301                 int status;
 302                 u8 value;
 303
 304                 status = get_register_interruptible(ab8500, AB8500_INTERRUPT,
 305                         AB8500_IT_LATCH1_REG + regoffset, &value);
 306                 if (status < 0 || value == 0)
 307                         continue;
 308
 309                 do {
 310                         int bit = __ffs(value);
 311                         int line = i * 8 + bit;
 312
 313                         handle_nested_irq(ab8500->irq_base + line);
 314                         value &= ~(1 << bit);
 315                 } while (value);
 316         }
 317
 318         return IRQ_HANDLED;
 319 }
 320
 321 static int ab8500_irq_init(struct ab8500 *ab8500)
 322 {
 323         int base = ab8500->irq_base;
 324         int irq;
 325
 326         for (irq = base; irq < base + AB8500_NR_IRQS; irq++) {
 327                 set_irq_chip_data(irq, ab8500);
 328                 set_irq_chip_and_handler(irq, &ab8500_irq_chip,
 329                                          handle_simple_irq);
 330                 set_irq_nested_thread(irq, 1);
 331 #ifdef CONFIG_ARM
 332                 set_irq_flags(irq, IRQF_VALID);
 333 #else
 334                 set_irq_noprobe(irq);
 335 #endif
 336         }
 337
 338         return 0;
 339 }
 340
 341 static void ab8500_irq_remove(struct ab8500 *ab8500)
 342 {
 343         int base = ab8500->irq_base;
 344         int irq;
 345
 346         for (irq = base; irq < base + AB8500_NR_IRQS; irq++) {
 347 #ifdef CONFIG_ARM
 348                 set_irq_flags(irq, 0);
 349 #endif
 350                 set_irq_chip_and_handler(irq, NULL, NULL);
 351                 set_irq_chip_data(irq, NULL);
 352         }
 353 }
 354
 355 static struct resource ab8500_gpadc_resources[] = {
 356         {
 357                 .name   = "HW_CONV_END",
 358                 .start  = AB8500_INT_GP_HW_ADC_CONV_END,
 359                 .end    = AB8500_INT_GP_HW_ADC_CONV_END,
 360                 .flags  = IORESOURCE_IRQ,
 361         },
 362         {
 363                 .name   = "SW_CONV_END",
 364                 .start  = AB8500_INT_GP_SW_ADC_CONV_END,
 365                 .end    = AB8500_INT_GP_SW_ADC_CONV_END,
 366                 .flags  = IORESOURCE_IRQ,
 367         },
 368 };
 369
 370 static struct resource ab8500_rtc_resources[] = {
 371         {
 372                 .name   = "60S",
 373                 .start  = AB8500_INT_RTC_60S,
 374                 .end    = AB8500_INT_RTC_60S,
 375                 .flags  = IORESOURCE_IRQ,
 376         },
 377         {
 378                 .name   = "ALARM",
 379                 .start  = AB8500_INT_RTC_ALARM,
 380                 .end    = AB8500_INT_RTC_ALARM,
 381                 .flags  = IORESOURCE_IRQ,
 382         },
 383 };
 384
 385 static struct resource ab8500_poweronkey_db_resources[] = {
 386         {
 387                 .name   = "ONKEY_DBF",
 388                 .start  = AB8500_INT_PON_KEY1DB_F,
 389                 .end    = AB8500_INT_PON_KEY1DB_F,
 390                 .flags  = IORESOURCE_IRQ,
 391         },
 392         {
 393                 .name   = "ONKEY_DBR",
 394                 .start  = AB8500_INT_PON_KEY1DB_R,
 395                 .end    = AB8500_INT_PON_KEY1DB_R,
 396                 .flags  = IORESOURCE_IRQ,
 397         },
 398 };
 399
 400 static struct resource ab8500_bm_resources[] = {
 401         {
 402                 .name = "MAIN_EXT_CH_NOT_OK",
 403                 .start = AB8500_INT_MAIN_EXT_CH_NOT_OK,
 404                 .end = AB8500_INT_MAIN_EXT_CH_NOT_OK,
 405                 .flags = IORESOURCE_IRQ,
 406         },
 407         {
 408                 .name = "BATT_OVV",
 409                 .start = AB8500_INT_BATT_OVV,
 410                 .end = AB8500_INT_BATT_OVV,
 411                 .flags = IORESOURCE_IRQ,
 412         },
 413         {
 414                 .name = "MAIN_CH_UNPLUG_DET",
 415                 .start = AB8500_INT_MAIN_CH_UNPLUG_DET,
 416                 .end = AB8500_INT_MAIN_CH_UNPLUG_DET,
 417                 .flags = IORESOURCE_IRQ,
 418         },
 419         {
 420                 .name = "MAIN_CHARGE_PLUG_DET",
 421                 .start = AB8500_INT_MAIN_CH_PLUG_DET,
 422                 .end = AB8500_INT_MAIN_CH_PLUG_DET,
 423                 .flags = IORESOURCE_IRQ,
 424         },
 425         {
 426                 .name = "VBUS_DET_F",
 427                 .start = AB8500_INT_VBUS_DET_F,
 428                 .end = AB8500_INT_VBUS_DET_F,
 429                 .flags = IORESOURCE_IRQ,
 430         },
 431         {
 432                 .name = "VBUS_DET_R",
 433                 .start = AB8500_INT_VBUS_DET_R,
 434                 .end = AB8500_INT_VBUS_DET_R,
 435                 .flags = IORESOURCE_IRQ,
 436         },
 437         {
 438                 .name = "BAT_CTRL_INDB",
 439                 .start = AB8500_INT_BAT_CTRL_INDB,
 440                 .end = AB8500_INT_BAT_CTRL_INDB,
 441                 .flags = IORESOURCE_IRQ,
 442         },
 443         {
 444                 .name = "CH_WD_EXP",
 445                 .start = AB8500_INT_CH_WD_EXP,
 446                 .end = AB8500_INT_CH_WD_EXP,
 447                 .flags = IORESOURCE_IRQ,
 448         },
 449         {
 450                 .name = "VBUS_OVV",
 451                 .start = AB8500_INT_VBUS_OVV,
 452                 .end = AB8500_INT_VBUS_OVV,
 453                 .flags = IORESOURCE_IRQ,
 454         },
 455         {
 456                 .name = "NCONV_ACCU",
 457                 .start = AB8500_INT_CCN_CONV_ACC,
 458                 .end = AB8500_INT_CCN_CONV_ACC,
 459                 .flags = IORESOURCE_IRQ,
 460         },
 461         {
 462                 .name = "LOW_BAT_F",
 463                 .start = AB8500_INT_LOW_BAT_F,
 464                 .end = AB8500_INT_LOW_BAT_F,
 465                 .flags = IORESOURCE_IRQ,
 466         },
 467         {
 468                 .name = "LOW_BAT_R",
 469                 .start = AB8500_INT_LOW_BAT_R,
 470                 .end = AB8500_INT_LOW_BAT_R,
 471                 .flags = IORESOURCE_IRQ,
 472         },
 473         {
 474                 .name = "BTEMP_LOW",
 475                 .start = AB8500_INT_BTEMP_LOW,
 476                 .end = AB8500_INT_BTEMP_LOW,
 477                 .flags = IORESOURCE_IRQ,
 478         },
 479         {
 480                 .name = "BTEMP_HIGH",
 481                 .start = AB8500_INT_BTEMP_HIGH,
 482                 .end = AB8500_INT_BTEMP_HIGH,
 483                 .flags = IORESOURCE_IRQ,
 484         },
 485         {
 486                 .name = "USB_CHARGER_NOT_OKR",
 487                 .start = AB8500_INT_USB_CHARGER_NOT_OK,
 488                 .end = AB8500_INT_USB_CHARGER_NOT_OK,
 489                 .flags = IORESOURCE_IRQ,
 490         },
 491         {
 492                 .name = "USB_CHARGE_DET_DONE",
 493                 .start = AB8500_INT_USB_CHG_DET_DONE,
 494                 .end = AB8500_INT_USB_CHG_DET_DONE,
 495                 .flags = IORESOURCE_IRQ,
 496         },
 497         {
 498                 .name = "USB_CH_TH_PROT_R",
 499                 .start = AB8500_INT_USB_CH_TH_PROT_R,
 500                 .end = AB8500_INT_USB_CH_TH_PROT_R,
 501                 .flags = IORESOURCE_IRQ,
 502         },
 503         {
 504                 .name = "MAIN_CH_TH_PROT_R",
 505                 .start = AB8500_INT_MAIN_CH_TH_PROT_R,
 506                 .end = AB8500_INT_MAIN_CH_TH_PROT_R,
 507                 .flags = IORESOURCE_IRQ,
 508         },
 509         {
 510                 .name = "USB_CHARGER_NOT_OKF",
 511                 .start = AB8500_INT_USB_CHARGER_NOT_OKF,
 512                 .end = AB8500_INT_USB_CHARGER_NOT_OKF,
 513                 .flags = IORESOURCE_IRQ,
 514         },
 515 };
 516
 517 static struct resource ab8500_debug_resources[] = {
 518         {
 519                 .name   = "IRQ_FIRST",
 520                 .start  = AB8500_INT_MAIN_EXT_CH_NOT_OK,
 521                 .end    = AB8500_INT_MAIN_EXT_CH_NOT_OK,
 522                 .flags  = IORESOURCE_IRQ,
 523         },
 524         {
 525                 .name   = "IRQ_LAST",
 526                 .start  = AB8500_INT_USB_CHARGER_NOT_OKF,
 527                 .end    = AB8500_INT_USB_CHARGER_NOT_OKF,
 528                 .flags  = IORESOURCE_IRQ,
 529         },
 530 };
 531
 532 static struct resource ab8500_usb_resources[] = {
 533         {
 534                 .name = "ID_WAKEUP_R",
 535                 .start = AB8500_INT_ID_WAKEUP_R,
 536                 .end = AB8500_INT_ID_WAKEUP_R,
 537                 .flags = IORESOURCE_IRQ,
 538         },
 539         {
 540                 .name = "ID_WAKEUP_F",
 541                 .start = AB8500_INT_ID_WAKEUP_F,
 542                 .end = AB8500_INT_ID_WAKEUP_F,
 543                 .flags = IORESOURCE_IRQ,
 544         },
 545         {
 546                 .name = "VBUS_DET_F",
 547                 .start = AB8500_INT_VBUS_DET_F,
 548                 .end = AB8500_INT_VBUS_DET_F,
 549                 .flags = IORESOURCE_IRQ,
 550         },
 551         {
 552                 .name = "VBUS_DET_R",
 553                 .start = AB8500_INT_VBUS_DET_R,
 554                 .end = AB8500_INT_VBUS_DET_R,
 555                 .flags = IORESOURCE_IRQ,
 556         },
 557 };
 558
 559 static struct resource ab8500_temp_resources[] = {
 560         {
 561                 .name  = "AB8500_TEMP_WARM",
 562                 .start = AB8500_INT_TEMP_WARM,
 563                 .end   = AB8500_INT_TEMP_WARM,
 564                 .flags = IORESOURCE_IRQ,
 565         },
 566 };
 567
 568 static struct mfd_cell ab8500_devs[] = {
 569 #ifdef CONFIG_DEBUG_FS
 570         {
 571                 .name = "ab8500-debug",
 572                 .num_resources = ARRAY_SIZE(ab8500_debug_resources),
 573                 .resources = ab8500_debug_resources,
 574         },
 575 #endif
 576         {
 577                 .name = "ab8500-sysctrl",
 578         },
 579         {
 580                 .name = "ab8500-regulator",
 581         },
 582         {
 583                 .name = "ab8500-gpadc",
 584                 .num_resources = ARRAY_SIZE(ab8500_gpadc_resources),
 585                 .resources = ab8500_gpadc_resources,
 586         },
 587         {
 588                 .name = "ab8500-rtc",
 589                 .num_resources = ARRAY_SIZE(ab8500_rtc_resources),
 590                 .resources = ab8500_rtc_resources,
 591         },
 592         {
 593                 .name = "ab8500-bm",
 594                 .num_resources = ARRAY_SIZE(ab8500_bm_resources),
 595                 .resources = ab8500_bm_resources,
 596         },
 597         { .name = "ab8500-codec", },
 598         {
 599                 .name = "ab8500-usb",
 600                 .num_resources = ARRAY_SIZE(ab8500_usb_resources),
 601                 .resources = ab8500_usb_resources,
 602         },
 603         {
 604                 .name = "ab8500-poweron-key",
 605                 .num_resources = ARRAY_SIZE(ab8500_poweronkey_db_resources),
 606                 .resources = ab8500_poweronkey_db_resources,
 607         },
 608         {
 609                 .name = "ab8500-pwm",
 610                 .id = 1,
 611         },
 612         {
 613                 .name = "ab8500-pwm",
 614                 .id = 2,
 615         },
 616         {
 617                 .name = "ab8500-pwm",
 618                 .id = 3,
 619         },
 620         { .name = "ab8500-leds", },
 621         {
 622                 .name = "ab8500-denc",
 623         },
 624         {
 625                 .name = "ab8500-temp",
 626                 .num_resources = ARRAY_SIZE(ab8500_temp_resources),
 627                 .resources = ab8500_temp_resources,
 628         },
 629 };
 630
 631 static ssize_t show_chip_id(struct device *dev,
 632                                 struct device_attribute *attr, char *buf)
 633 {
 634         struct ab8500 *ab8500;
 635
 636         ab8500 = dev_get_drvdata(dev);
 637         return sprintf(buf, "%#x\n", ab8500 ? ab8500->chip_id : -EINVAL);
 638 }
 639
 640 static DEVICE_ATTR(chip_id, S_IRUGO, show_chip_id, NULL);
 641
 642 static struct attribute *ab8500_sysfs_entries[] = {
 643         &dev_attr_chip_id.attr,
 644         NULL,
 645 };
 646
 647 static struct attribute_group ab8500_attr_group = {
 648         .attrs  = ab8500_sysfs_entries,
 649 };
 650
 651 int __devinit ab8500_init(struct ab8500 *ab8500)
 652 {
 653         struct ab8500_platform_data *plat = dev_get_platdata(ab8500->dev);
 654         int ret;
 655         int i;
 656         u8 value;
 657
 658         if (plat)
 659                 ab8500->irq_base = plat->irq_base;
 660
 661         mutex_init(&ab8500->lock);
 662         mutex_init(&ab8500->irq_lock);
 663
 664         ret = get_register_interruptible(ab8500, AB8500_MISC,
 665                 AB8500_REV_REG, &value);
 666         if (ret < 0)
 667                 return ret;
 668
 669         /*
 670          * 0x0 - Early Drop
 671          * 0x10 - Cut 1.0
 672          * 0x11 - Cut 1.1
 673          */
 674         if (value == 0x0 || value == 0x10 || value == 0x11) {
 675                 ab8500->revision = value;
 676                 dev_info(ab8500->dev, "detected chip, revision: %#x\n", value);
 677         } else {
 678                 dev_err(ab8500->dev, "unknown chip, revision: %#x\n", value);
 679                 return -EINVAL;
 680         }
 681         ab8500->chip_id = value;
 682
 683         if (plat && plat->init)
 684                 plat->init(ab8500);
 685
 686         /* Clear and mask all interrupts */
 687         for (i = 0; i < 10; i++) {
 688                 get_register_interruptible(ab8500, AB8500_INTERRUPT,
 689                         AB8500_IT_LATCH1_REG + i, &value);
 690                 set_register_interruptible(ab8500, AB8500_INTERRUPT,
 691                         AB8500_IT_MASK1_REG + i, 0xff);
 692         }
 693
 694         for (i = 18; i < 24; i++) {
 695                 get_register_interruptible(ab8500, AB8500_INTERRUPT,
 696                         AB8500_IT_LATCH1_REG + i, &value);
 697                 set_register_interruptible(ab8500, AB8500_INTERRUPT,
 698                         AB8500_IT_MASK1_REG + i, 0xff);
 699         }
 700
 701         ret = abx500_register_ops(ab8500->dev, &ab8500_ops);
 702         if (ret)
 703                 return ret;
 704
 705         for (i = 0; i < AB8500_NUM_IRQ_REGS; i++)
 706                 ab8500->mask[i] = ab8500->oldmask[i] = 0xff;
 707
 708         if (ab8500->irq_base) {
 709                 ret = ab8500_irq_init(ab8500);
 710                 if (ret)
 711                         return ret;
 712
 713                 ret = request_threaded_irq(ab8500->irq, NULL, ab8500_irq,
 714                                            IRQF_ONESHOT | IRQF_NO_SUSPEND,
 715                                            "ab8500", ab8500);
 716                 if (ret)
 717                         goto out_removeirq;
 718         }
 719
 720         ret = mfd_add_devices(ab8500->dev, 0, ab8500_devs,
 721                               ARRAY_SIZE(ab8500_devs), NULL,
 722                               ab8500->irq_base);
 723         if (ret)
 724                 goto out_freeirq;
 725
 726         ret = sysfs_create_group(&ab8500->dev->kobj, &ab8500_attr_group);
 727         if (ret)
 728                 dev_err(ab8500->dev, "error creating sysfs entries\n");
 729
 730         return ret;
 731
 732 out_freeirq:
 733         if (ab8500->irq_base) {
 734                 free_irq(ab8500->irq, ab8500);
 735 out_removeirq:
 736                 ab8500_irq_remove(ab8500);
 737         }
 738         return ret;
 739 }
 740
 741 int __devexit ab8500_exit(struct ab8500 *ab8500)
 742 {
 743         sysfs_remove_group(&ab8500->dev->kobj, &ab8500_attr_group);
 744         mfd_remove_devices(ab8500->dev);
 745         if (ab8500->irq_base) {
 746                 free_irq(ab8500->irq, ab8500);
 747                 ab8500_irq_remove(ab8500);
 748         }
 749
 750         return 0;
 751 }
 752
 753 MODULE_AUTHOR("Srinidhi Kasagar, Rabin Vincent");
 754 MODULE_DESCRIPTION("AB8500 MFD core");
 755 MODULE_LICENSE("GPL v2");