1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (C) ST-Ericsson SA 2010 4 * 5 * Author: Srinidhi Kasagar <srinidhi.kasagar@stericsson.com> 6 * Author: Rabin Vincent <rabin.vincent@stericsson.com> 7 * Author: Mattias Wallin <mattias.wallin@stericsson.com> 8 */ 9 10 #include <linux/kernel.h> 11 #include <linux/slab.h> 12 #include <linux/init.h> 13 #include <linux/irq.h> 14 #include <linux/irqdomain.h> 15 #include <linux/delay.h> 16 #include <linux/interrupt.h> 17 #include <linux/moduleparam.h> 18 #include <linux/platform_device.h> 19 #include <linux/mfd/core.h> 20 #include <linux/mfd/abx500.h> 21 #include <linux/mfd/abx500/ab8500.h> 22 #include <linux/mfd/abx500/ab8500-bm.h> 23 #include <linux/mfd/dbx500-prcmu.h> 24 #include <linux/regulator/ab8500.h> 25 #include <linux/of.h> 26 #include <linux/of_device.h> 27 28 /* 29 * Interrupt register offsets 30 * Bank : 0x0E 31 */ 32 #define AB8500_IT_SOURCE1_REG 0x00 33 #define AB8500_IT_SOURCE2_REG 0x01 34 #define AB8500_IT_SOURCE3_REG 0x02 35 #define AB8500_IT_SOURCE4_REG 0x03 36 #define AB8500_IT_SOURCE5_REG 0x04 37 #define AB8500_IT_SOURCE6_REG 0x05 38 #define AB8500_IT_SOURCE7_REG 0x06 39 #define AB8500_IT_SOURCE8_REG 0x07 40 #define AB9540_IT_SOURCE13_REG 0x0C 41 #define AB8500_IT_SOURCE19_REG 0x12 42 #define AB8500_IT_SOURCE20_REG 0x13 43 #define AB8500_IT_SOURCE21_REG 0x14 44 #define AB8500_IT_SOURCE22_REG 0x15 45 #define AB8500_IT_SOURCE23_REG 0x16 46 #define AB8500_IT_SOURCE24_REG 0x17 47 48 /* 49 * latch registers 50 */ 51 #define AB8500_IT_LATCH1_REG 0x20 52 #define AB8500_IT_LATCH2_REG 0x21 53 #define AB8500_IT_LATCH3_REG 0x22 54 #define AB8500_IT_LATCH4_REG 0x23 55 #define AB8500_IT_LATCH5_REG 0x24 56 #define AB8500_IT_LATCH6_REG 0x25 57 #define AB8500_IT_LATCH7_REG 0x26 58 #define AB8500_IT_LATCH8_REG 0x27 59 #define AB8500_IT_LATCH9_REG 0x28 60 #define AB8500_IT_LATCH10_REG 0x29 61 #define AB8500_IT_LATCH12_REG 0x2B 62 #define AB9540_IT_LATCH13_REG 0x2C 63 #define AB8500_IT_LATCH19_REG 0x32 64 #define AB8500_IT_LATCH20_REG 0x33 65 #define AB8500_IT_LATCH21_REG 0x34 66 #define AB8500_IT_LATCH22_REG 0x35 67 #define AB8500_IT_LATCH23_REG 0x36 68 #define AB8500_IT_LATCH24_REG 0x37 69 70 /* 71 * mask registers 72 */ 73 74 #define AB8500_IT_MASK1_REG 0x40 75 #define AB8500_IT_MASK2_REG 0x41 76 #define AB8500_IT_MASK3_REG 0x42 77 #define AB8500_IT_MASK4_REG 0x43 78 #define AB8500_IT_MASK5_REG 0x44 79 #define AB8500_IT_MASK6_REG 0x45 80 #define AB8500_IT_MASK7_REG 0x46 81 #define AB8500_IT_MASK8_REG 0x47 82 #define AB8500_IT_MASK9_REG 0x48 83 #define AB8500_IT_MASK10_REG 0x49 84 #define AB8500_IT_MASK11_REG 0x4A 85 #define AB8500_IT_MASK12_REG 0x4B 86 #define AB8500_IT_MASK13_REG 0x4C 87 #define AB8500_IT_MASK14_REG 0x4D 88 #define AB8500_IT_MASK15_REG 0x4E 89 #define AB8500_IT_MASK16_REG 0x4F 90 #define AB8500_IT_MASK17_REG 0x50 91 #define AB8500_IT_MASK18_REG 0x51 92 #define AB8500_IT_MASK19_REG 0x52 93 #define AB8500_IT_MASK20_REG 0x53 94 #define AB8500_IT_MASK21_REG 0x54 95 #define AB8500_IT_MASK22_REG 0x55 96 #define AB8500_IT_MASK23_REG 0x56 97 #define AB8500_IT_MASK24_REG 0x57 98 #define AB8500_IT_MASK25_REG 0x58 99 100 /* 101 * latch hierarchy registers 102 */ 103 #define AB8500_IT_LATCHHIER1_REG 0x60 104 #define AB8500_IT_LATCHHIER2_REG 0x61 105 #define AB8500_IT_LATCHHIER3_REG 0x62 106 #define AB8540_IT_LATCHHIER4_REG 0x63 107 108 #define AB8500_IT_LATCHHIER_NUM 3 109 #define AB8540_IT_LATCHHIER_NUM 4 110 111 #define AB8500_REV_REG 0x80 112 #define AB8500_IC_NAME_REG 0x82 113 #define AB8500_SWITCH_OFF_STATUS 0x00 114 115 #define AB8500_TURN_ON_STATUS 0x00 116 #define AB8505_TURN_ON_STATUS_2 0x04 117 118 #define AB8500_CH_USBCH_STAT1_REG 0x02 119 #define VBUS_DET_DBNC100 0x02 120 #define VBUS_DET_DBNC1 0x01 121 122 static DEFINE_SPINLOCK(on_stat_lock); 123 static u8 turn_on_stat_mask = 0xFF; 124 static u8 turn_on_stat_set; 125 static bool no_bm; /* No battery management */ 126 /* 127 * not really modular, but the easiest way to keep compat with existing 128 * bootargs behaviour is to continue using module_param here. 129 */ 130 module_param(no_bm, bool, S_IRUGO); 131 132 #define AB9540_MODEM_CTRL2_REG 0x23 133 #define AB9540_MODEM_CTRL2_SWDBBRSTN_BIT BIT(2) 134 135 /* 136 * Map interrupt numbers to the LATCH and MASK register offsets, Interrupt 137 * numbers are indexed into this array with (num / 8). The interupts are 138 * defined in linux/mfd/ab8500.h 139 * 140 * This is one off from the register names, i.e. AB8500_IT_MASK1_REG is at 141 * offset 0. 142 */ 143 /* AB8500 support */ 144 static const int ab8500_irq_regoffset[AB8500_NUM_IRQ_REGS] = { 145 0, 1, 2, 3, 4, 6, 7, 8, 9, 11, 18, 19, 20, 21, 146 }; 147 148 /* AB9540 / AB8505 support */ 149 static const int ab9540_irq_regoffset[AB9540_NUM_IRQ_REGS] = { 150 0, 1, 2, 3, 4, 6, 7, 8, 9, 11, 18, 19, 20, 21, 12, 13, 24, 5, 22, 23 151 }; 152 153 /* AB8540 support */ 154 static const int ab8540_irq_regoffset[AB8540_NUM_IRQ_REGS] = { 155 0, 1, 2, 3, 4, -1, -1, -1, -1, 11, 18, 19, 20, 21, 12, 13, 24, 5, 22, 156 23, 25, 26, 27, 28, 29, 30, 31, 157 }; 158 159 static const char ab8500_version_str[][7] = { 160 [AB8500_VERSION_AB8500] = "AB8500", 161 [AB8500_VERSION_AB8505] = "AB8505", 162 [AB8500_VERSION_AB9540] = "AB9540", 163 [AB8500_VERSION_AB8540] = "AB8540", 164 }; 165 166 static int ab8500_prcmu_write(struct ab8500 *ab8500, u16 addr, u8 data) 167 { 168 int ret; 169 170 ret = prcmu_abb_write((u8)(addr >> 8), (u8)(addr & 0xFF), &data, 1); 171 if (ret < 0) 172 dev_err(ab8500->dev, "prcmu i2c error %d\n", ret); 173 return ret; 174 } 175 176 static int ab8500_prcmu_write_masked(struct ab8500 *ab8500, u16 addr, u8 mask, 177 u8 data) 178 { 179 int ret; 180 181 ret = prcmu_abb_write_masked((u8)(addr >> 8), (u8)(addr & 0xFF), &data, 182 &mask, 1); 183 if (ret < 0) 184 dev_err(ab8500->dev, "prcmu i2c error %d\n", ret); 185 return ret; 186 } 187 188 static int ab8500_prcmu_read(struct ab8500 *ab8500, u16 addr) 189 { 190 int ret; 191 u8 data; 192 193 ret = prcmu_abb_read((u8)(addr >> 8), (u8)(addr & 0xFF), &data, 1); 194 if (ret < 0) { 195 dev_err(ab8500->dev, "prcmu i2c error %d\n", ret); 196 return ret; 197 } 198 return (int)data; 199 } 200 201 static int ab8500_get_chip_id(struct device *dev) 202 { 203 struct ab8500 *ab8500; 204 205 if (!dev) 206 return -EINVAL; 207 ab8500 = dev_get_drvdata(dev->parent); 208 return ab8500 ? (int)ab8500->chip_id : -EINVAL; 209 } 210 211 static int set_register_interruptible(struct ab8500 *ab8500, u8 bank, 212 u8 reg, u8 data) 213 { 214 int ret; 215 /* 216 * Put the u8 bank and u8 register together into a an u16. 217 * The bank on higher 8 bits and register in lower 8 bits. 218 */ 219 u16 addr = ((u16)bank) << 8 | reg; 220 221 dev_vdbg(ab8500->dev, "wr: addr %#x <= %#x\n", addr, data); 222 223 mutex_lock(&ab8500->lock); 224 225 ret = ab8500->write(ab8500, addr, data); 226 if (ret < 0) 227 dev_err(ab8500->dev, "failed to write reg %#x: %d\n", 228 addr, ret); 229 mutex_unlock(&ab8500->lock); 230 231 return ret; 232 } 233 234 static int ab8500_set_register(struct device *dev, u8 bank, 235 u8 reg, u8 value) 236 { 237 int ret; 238 struct ab8500 *ab8500 = dev_get_drvdata(dev->parent); 239 240 atomic_inc(&ab8500->transfer_ongoing); 241 ret = set_register_interruptible(ab8500, bank, reg, value); 242 atomic_dec(&ab8500->transfer_ongoing); 243 return ret; 244 } 245 246 static int get_register_interruptible(struct ab8500 *ab8500, u8 bank, 247 u8 reg, u8 *value) 248 { 249 int ret; 250 u16 addr = ((u16)bank) << 8 | reg; 251 252 mutex_lock(&ab8500->lock); 253 254 ret = ab8500->read(ab8500, addr); 255 if (ret < 0) 256 dev_err(ab8500->dev, "failed to read reg %#x: %d\n", 257 addr, ret); 258 else 259 *value = ret; 260 261 mutex_unlock(&ab8500->lock); 262 dev_vdbg(ab8500->dev, "rd: addr %#x => data %#x\n", addr, ret); 263 264 return (ret < 0) ? ret : 0; 265 } 266 267 static int ab8500_get_register(struct device *dev, u8 bank, 268 u8 reg, u8 *value) 269 { 270 int ret; 271 struct ab8500 *ab8500 = dev_get_drvdata(dev->parent); 272 273 atomic_inc(&ab8500->transfer_ongoing); 274 ret = get_register_interruptible(ab8500, bank, reg, value); 275 atomic_dec(&ab8500->transfer_ongoing); 276 return ret; 277 } 278 279 static int mask_and_set_register_interruptible(struct ab8500 *ab8500, u8 bank, 280 u8 reg, u8 bitmask, u8 bitvalues) 281 { 282 int ret; 283 u16 addr = ((u16)bank) << 8 | reg; 284 285 mutex_lock(&ab8500->lock); 286 287 if (ab8500->write_masked == NULL) { 288 u8 data; 289 290 ret = ab8500->read(ab8500, addr); 291 if (ret < 0) { 292 dev_err(ab8500->dev, "failed to read reg %#x: %d\n", 293 addr, ret); 294 goto out; 295 } 296 297 data = (u8)ret; 298 data = (~bitmask & data) | (bitmask & bitvalues); 299 300 ret = ab8500->write(ab8500, addr, data); 301 if (ret < 0) 302 dev_err(ab8500->dev, "failed to write reg %#x: %d\n", 303 addr, ret); 304 305 dev_vdbg(ab8500->dev, "mask: addr %#x => data %#x\n", addr, 306 data); 307 goto out; 308 } 309 ret = ab8500->write_masked(ab8500, addr, bitmask, bitvalues); 310 if (ret < 0) 311 dev_err(ab8500->dev, "failed to modify reg %#x: %d\n", addr, 312 ret); 313 out: 314 mutex_unlock(&ab8500->lock); 315 return ret; 316 } 317 318 static int ab8500_mask_and_set_register(struct device *dev, 319 u8 bank, u8 reg, u8 bitmask, u8 bitvalues) 320 { 321 int ret; 322 struct ab8500 *ab8500 = dev_get_drvdata(dev->parent); 323 324 atomic_inc(&ab8500->transfer_ongoing); 325 ret = mask_and_set_register_interruptible(ab8500, bank, reg, 326 bitmask, bitvalues); 327 atomic_dec(&ab8500->transfer_ongoing); 328 return ret; 329 } 330 331 static struct abx500_ops ab8500_ops = { 332 .get_chip_id = ab8500_get_chip_id, 333 .get_register = ab8500_get_register, 334 .set_register = ab8500_set_register, 335 .get_register_page = NULL, 336 .set_register_page = NULL, 337 .mask_and_set_register = ab8500_mask_and_set_register, 338 .event_registers_startup_state_get = NULL, 339 .startup_irq_enabled = NULL, 340 .dump_all_banks = ab8500_dump_all_banks, 341 }; 342 343 static void ab8500_irq_lock(struct irq_data *data) 344 { 345 struct ab8500 *ab8500 = irq_data_get_irq_chip_data(data); 346 347 mutex_lock(&ab8500->irq_lock); 348 atomic_inc(&ab8500->transfer_ongoing); 349 } 350 351 static void ab8500_irq_sync_unlock(struct irq_data *data) 352 { 353 struct ab8500 *ab8500 = irq_data_get_irq_chip_data(data); 354 int i; 355 356 for (i = 0; i < ab8500->mask_size; i++) { 357 u8 old = ab8500->oldmask[i]; 358 u8 new = ab8500->mask[i]; 359 int reg; 360 361 if (new == old) 362 continue; 363 364 /* 365 * Interrupt register 12 doesn't exist prior to AB8500 version 366 * 2.0 367 */ 368 if (ab8500->irq_reg_offset[i] == 11 && 369 is_ab8500_1p1_or_earlier(ab8500)) 370 continue; 371 372 if (ab8500->irq_reg_offset[i] < 0) 373 continue; 374 375 ab8500->oldmask[i] = new; 376 377 reg = AB8500_IT_MASK1_REG + ab8500->irq_reg_offset[i]; 378 set_register_interruptible(ab8500, AB8500_INTERRUPT, reg, new); 379 } 380 atomic_dec(&ab8500->transfer_ongoing); 381 mutex_unlock(&ab8500->irq_lock); 382 } 383 384 static void ab8500_irq_mask(struct irq_data *data) 385 { 386 struct ab8500 *ab8500 = irq_data_get_irq_chip_data(data); 387 int offset = data->hwirq; 388 int index = offset / 8; 389 int mask = 1 << (offset % 8); 390 391 ab8500->mask[index] |= mask; 392 393 /* The AB8500 GPIOs have two interrupts each (rising & falling). */ 394 if (offset >= AB8500_INT_GPIO6R && offset <= AB8500_INT_GPIO41R) 395 ab8500->mask[index + 2] |= mask; 396 if (offset >= AB9540_INT_GPIO50R && offset <= AB9540_INT_GPIO54R) 397 ab8500->mask[index + 1] |= mask; 398 if (offset == AB8540_INT_GPIO43R || offset == AB8540_INT_GPIO44R) 399 /* Here the falling IRQ is one bit lower */ 400 ab8500->mask[index] |= (mask << 1); 401 } 402 403 static void ab8500_irq_unmask(struct irq_data *data) 404 { 405 struct ab8500 *ab8500 = irq_data_get_irq_chip_data(data); 406 unsigned int type = irqd_get_trigger_type(data); 407 int offset = data->hwirq; 408 int index = offset / 8; 409 int mask = 1 << (offset % 8); 410 411 if (type & IRQ_TYPE_EDGE_RISING) 412 ab8500->mask[index] &= ~mask; 413 414 /* The AB8500 GPIOs have two interrupts each (rising & falling). */ 415 if (type & IRQ_TYPE_EDGE_FALLING) { 416 if (offset >= AB8500_INT_GPIO6R && offset <= AB8500_INT_GPIO41R) 417 ab8500->mask[index + 2] &= ~mask; 418 else if (offset >= AB9540_INT_GPIO50R && 419 offset <= AB9540_INT_GPIO54R) 420 ab8500->mask[index + 1] &= ~mask; 421 else if (offset == AB8540_INT_GPIO43R || 422 offset == AB8540_INT_GPIO44R) 423 /* Here the falling IRQ is one bit lower */ 424 ab8500->mask[index] &= ~(mask << 1); 425 else 426 ab8500->mask[index] &= ~mask; 427 } else { 428 /* Satisfies the case where type is not set. */ 429 ab8500->mask[index] &= ~mask; 430 } 431 } 432 433 static int ab8500_irq_set_type(struct irq_data *data, unsigned int type) 434 { 435 return 0; 436 } 437 438 static struct irq_chip ab8500_irq_chip = { 439 .name = "ab8500", 440 .irq_bus_lock = ab8500_irq_lock, 441 .irq_bus_sync_unlock = ab8500_irq_sync_unlock, 442 .irq_mask = ab8500_irq_mask, 443 .irq_disable = ab8500_irq_mask, 444 .irq_unmask = ab8500_irq_unmask, 445 .irq_set_type = ab8500_irq_set_type, 446 }; 447 448 static void update_latch_offset(u8 *offset, int i) 449 { 450 /* Fix inconsistent ITFromLatch25 bit mapping... */ 451 if (unlikely(*offset == 17)) 452 *offset = 24; 453 /* Fix inconsistent ab8540 bit mapping... */ 454 if (unlikely(*offset == 16)) 455 *offset = 25; 456 if ((i == 3) && (*offset >= 24)) 457 *offset += 2; 458 } 459 460 static int ab8500_handle_hierarchical_line(struct ab8500 *ab8500, 461 int latch_offset, u8 latch_val) 462 { 463 int int_bit, line, i; 464 465 for (i = 0; i < ab8500->mask_size; i++) 466 if (ab8500->irq_reg_offset[i] == latch_offset) 467 break; 468 469 if (i >= ab8500->mask_size) { 470 dev_err(ab8500->dev, "Register offset 0x%2x not declared\n", 471 latch_offset); 472 return -ENXIO; 473 } 474 475 /* ignore masked out interrupts */ 476 latch_val &= ~ab8500->mask[i]; 477 478 while (latch_val) { 479 int_bit = __ffs(latch_val); 480 line = (i << 3) + int_bit; 481 latch_val &= ~(1 << int_bit); 482 483 /* 484 * This handles the falling edge hwirqs from the GPIO 485 * lines. Route them back to the line registered for the 486 * rising IRQ, as this is merely a flag for the same IRQ 487 * in linux terms. 488 */ 489 if (line >= AB8500_INT_GPIO6F && line <= AB8500_INT_GPIO41F) 490 line -= 16; 491 if (line >= AB9540_INT_GPIO50F && line <= AB9540_INT_GPIO54F) 492 line -= 8; 493 if (line == AB8540_INT_GPIO43F || line == AB8540_INT_GPIO44F) 494 line += 1; 495 496 handle_nested_irq(irq_create_mapping(ab8500->domain, line)); 497 } 498 499 return 0; 500 } 501 502 static int ab8500_handle_hierarchical_latch(struct ab8500 *ab8500, 503 int hier_offset, u8 hier_val) 504 { 505 int latch_bit, status; 506 u8 latch_offset, latch_val; 507 508 do { 509 latch_bit = __ffs(hier_val); 510 latch_offset = (hier_offset << 3) + latch_bit; 511 512 update_latch_offset(&latch_offset, hier_offset); 513 514 status = get_register_interruptible(ab8500, 515 AB8500_INTERRUPT, 516 AB8500_IT_LATCH1_REG + latch_offset, 517 &latch_val); 518 if (status < 0 || latch_val == 0) 519 goto discard; 520 521 status = ab8500_handle_hierarchical_line(ab8500, 522 latch_offset, latch_val); 523 if (status < 0) 524 return status; 525 discard: 526 hier_val &= ~(1 << latch_bit); 527 } while (hier_val); 528 529 return 0; 530 } 531 532 static irqreturn_t ab8500_hierarchical_irq(int irq, void *dev) 533 { 534 struct ab8500 *ab8500 = dev; 535 u8 i; 536 537 dev_vdbg(ab8500->dev, "interrupt\n"); 538 539 /* Hierarchical interrupt version */ 540 for (i = 0; i < (ab8500->it_latchhier_num); i++) { 541 int status; 542 u8 hier_val; 543 544 status = get_register_interruptible(ab8500, AB8500_INTERRUPT, 545 AB8500_IT_LATCHHIER1_REG + i, &hier_val); 546 if (status < 0 || hier_val == 0) 547 continue; 548 549 status = ab8500_handle_hierarchical_latch(ab8500, i, hier_val); 550 if (status < 0) 551 break; 552 } 553 return IRQ_HANDLED; 554 } 555 556 static int ab8500_irq_map(struct irq_domain *d, unsigned int virq, 557 irq_hw_number_t hwirq) 558 { 559 struct ab8500 *ab8500 = d->host_data; 560 561 if (!ab8500) 562 return -EINVAL; 563 564 irq_set_chip_data(virq, ab8500); 565 irq_set_chip_and_handler(virq, &ab8500_irq_chip, 566 handle_simple_irq); 567 irq_set_nested_thread(virq, 1); 568 irq_set_noprobe(virq); 569 570 return 0; 571 } 572 573 static const struct irq_domain_ops ab8500_irq_ops = { 574 .map = ab8500_irq_map, 575 .xlate = irq_domain_xlate_twocell, 576 }; 577 578 static int ab8500_irq_init(struct ab8500 *ab8500, struct device_node *np) 579 { 580 int num_irqs; 581 582 if (is_ab8540(ab8500)) 583 num_irqs = AB8540_NR_IRQS; 584 else if (is_ab9540(ab8500)) 585 num_irqs = AB9540_NR_IRQS; 586 else if (is_ab8505(ab8500)) 587 num_irqs = AB8505_NR_IRQS; 588 else 589 num_irqs = AB8500_NR_IRQS; 590 591 /* If ->irq_base is zero this will give a linear mapping */ 592 ab8500->domain = irq_domain_add_simple(ab8500->dev->of_node, 593 num_irqs, 0, 594 &ab8500_irq_ops, ab8500); 595 596 if (!ab8500->domain) { 597 dev_err(ab8500->dev, "Failed to create irqdomain\n"); 598 return -ENODEV; 599 } 600 601 return 0; 602 } 603 604 int ab8500_suspend(struct ab8500 *ab8500) 605 { 606 if (atomic_read(&ab8500->transfer_ongoing)) 607 return -EINVAL; 608 609 return 0; 610 } 611 612 static const struct mfd_cell ab8500_bm_devs[] = { 613 OF_MFD_CELL("ab8500-charger", NULL, &ab8500_bm_data, 614 sizeof(ab8500_bm_data), 0, "stericsson,ab8500-charger"), 615 OF_MFD_CELL("ab8500-btemp", NULL, &ab8500_bm_data, 616 sizeof(ab8500_bm_data), 0, "stericsson,ab8500-btemp"), 617 OF_MFD_CELL("ab8500-fg", NULL, &ab8500_bm_data, 618 sizeof(ab8500_bm_data), 0, "stericsson,ab8500-fg"), 619 OF_MFD_CELL("ab8500-chargalg", NULL, &ab8500_bm_data, 620 sizeof(ab8500_bm_data), 0, "stericsson,ab8500-chargalg"), 621 }; 622 623 static const struct mfd_cell ab8500_devs[] = { 624 #ifdef CONFIG_DEBUG_FS 625 OF_MFD_CELL("ab8500-debug", 626 NULL, NULL, 0, 0, "stericsson,ab8500-debug"), 627 #endif 628 OF_MFD_CELL("ab8500-sysctrl", 629 NULL, NULL, 0, 0, "stericsson,ab8500-sysctrl"), 630 OF_MFD_CELL("ab8500-ext-regulator", 631 NULL, NULL, 0, 0, "stericsson,ab8500-ext-regulator"), 632 OF_MFD_CELL("ab8500-regulator", 633 NULL, NULL, 0, 0, "stericsson,ab8500-regulator"), 634 OF_MFD_CELL("abx500-clk", 635 NULL, NULL, 0, 0, "stericsson,abx500-clk"), 636 OF_MFD_CELL("ab8500-gpadc", 637 NULL, NULL, 0, 0, "stericsson,ab8500-gpadc"), 638 OF_MFD_CELL("ab8500-rtc", 639 NULL, NULL, 0, 0, "stericsson,ab8500-rtc"), 640 OF_MFD_CELL("ab8500-acc-det", 641 NULL, NULL, 0, 0, "stericsson,ab8500-acc-det"), 642 OF_MFD_CELL("ab8500-poweron-key", 643 NULL, NULL, 0, 0, "stericsson,ab8500-poweron-key"), 644 OF_MFD_CELL("ab8500-pwm", 645 NULL, NULL, 0, 1, "stericsson,ab8500-pwm"), 646 OF_MFD_CELL("ab8500-pwm", 647 NULL, NULL, 0, 2, "stericsson,ab8500-pwm"), 648 OF_MFD_CELL("ab8500-pwm", 649 NULL, NULL, 0, 3, "stericsson,ab8500-pwm"), 650 OF_MFD_CELL("ab8500-denc", 651 NULL, NULL, 0, 0, "stericsson,ab8500-denc"), 652 OF_MFD_CELL("pinctrl-ab8500", 653 NULL, NULL, 0, 0, "stericsson,ab8500-gpio"), 654 OF_MFD_CELL("abx500-temp", 655 NULL, NULL, 0, 0, "stericsson,abx500-temp"), 656 OF_MFD_CELL("ab8500-usb", 657 NULL, NULL, 0, 0, "stericsson,ab8500-usb"), 658 OF_MFD_CELL("ab8500-codec", 659 NULL, NULL, 0, 0, "stericsson,ab8500-codec"), 660 }; 661 662 static const struct mfd_cell ab9540_devs[] = { 663 #ifdef CONFIG_DEBUG_FS 664 { 665 .name = "ab8500-debug", 666 }, 667 #endif 668 { 669 .name = "ab8500-sysctrl", 670 }, 671 { 672 .name = "ab8500-ext-regulator", 673 }, 674 { 675 .name = "ab8500-regulator", 676 }, 677 { 678 .name = "abx500-clk", 679 .of_compatible = "stericsson,abx500-clk", 680 }, 681 { 682 .name = "ab8500-gpadc", 683 .of_compatible = "stericsson,ab8500-gpadc", 684 }, 685 { 686 .name = "ab8500-rtc", 687 }, 688 { 689 .name = "ab8500-acc-det", 690 }, 691 { 692 .name = "ab8500-poweron-key", 693 }, 694 { 695 .name = "ab8500-pwm", 696 .id = 1, 697 }, 698 { 699 .name = "abx500-temp", 700 }, 701 { 702 .name = "pinctrl-ab9540", 703 .of_compatible = "stericsson,ab9540-gpio", 704 }, 705 { 706 .name = "ab9540-usb", 707 }, 708 { 709 .name = "ab9540-codec", 710 }, 711 { 712 .name = "ab-iddet", 713 }, 714 }; 715 716 /* Device list for ab8505 */ 717 static const struct mfd_cell ab8505_devs[] = { 718 #ifdef CONFIG_DEBUG_FS 719 { 720 .name = "ab8500-debug", 721 }, 722 #endif 723 { 724 .name = "ab8500-sysctrl", 725 }, 726 { 727 .name = "ab8500-regulator", 728 }, 729 { 730 .name = "abx500-clk", 731 .of_compatible = "stericsson,abx500-clk", 732 }, 733 { 734 .name = "ab8500-gpadc", 735 .of_compatible = "stericsson,ab8500-gpadc", 736 }, 737 { 738 .name = "ab8500-rtc", 739 }, 740 { 741 .name = "ab8500-acc-det", 742 }, 743 { 744 .name = "ab8500-poweron-key", 745 }, 746 { 747 .name = "ab8500-pwm", 748 .id = 1, 749 }, 750 { 751 .name = "pinctrl-ab8505", 752 }, 753 { 754 .name = "ab8500-usb", 755 }, 756 { 757 .name = "ab8500-codec", 758 }, 759 { 760 .name = "ab-iddet", 761 }, 762 }; 763 764 static const struct mfd_cell ab8540_devs[] = { 765 #ifdef CONFIG_DEBUG_FS 766 { 767 .name = "ab8500-debug", 768 }, 769 #endif 770 { 771 .name = "ab8500-sysctrl", 772 }, 773 { 774 .name = "ab8500-ext-regulator", 775 }, 776 { 777 .name = "ab8500-regulator", 778 }, 779 { 780 .name = "abx500-clk", 781 .of_compatible = "stericsson,abx500-clk", 782 }, 783 { 784 .name = "ab8500-gpadc", 785 .of_compatible = "stericsson,ab8500-gpadc", 786 }, 787 { 788 .name = "ab8500-acc-det", 789 }, 790 { 791 .name = "ab8500-poweron-key", 792 }, 793 { 794 .name = "ab8500-pwm", 795 .id = 1, 796 }, 797 { 798 .name = "abx500-temp", 799 }, 800 { 801 .name = "pinctrl-ab8540", 802 }, 803 { 804 .name = "ab8540-usb", 805 }, 806 { 807 .name = "ab8540-codec", 808 }, 809 { 810 .name = "ab-iddet", 811 }, 812 }; 813 814 static const struct mfd_cell ab8540_cut1_devs[] = { 815 { 816 .name = "ab8500-rtc", 817 .of_compatible = "stericsson,ab8500-rtc", 818 }, 819 }; 820 821 static const struct mfd_cell ab8540_cut2_devs[] = { 822 { 823 .name = "ab8540-rtc", 824 .of_compatible = "stericsson,ab8540-rtc", 825 }, 826 }; 827 828 static ssize_t show_chip_id(struct device *dev, 829 struct device_attribute *attr, char *buf) 830 { 831 struct ab8500 *ab8500; 832 833 ab8500 = dev_get_drvdata(dev); 834 835 return sprintf(buf, "%#x\n", ab8500 ? ab8500->chip_id : -EINVAL); 836 } 837 838 /* 839 * ab8500 has switched off due to (SWITCH_OFF_STATUS): 840 * 0x01 Swoff bit programming 841 * 0x02 Thermal protection activation 842 * 0x04 Vbat lower then BattOk falling threshold 843 * 0x08 Watchdog expired 844 * 0x10 Non presence of 32kHz clock 845 * 0x20 Battery level lower than power on reset threshold 846 * 0x40 Power on key 1 pressed longer than 10 seconds 847 * 0x80 DB8500 thermal shutdown 848 */ 849 static ssize_t show_switch_off_status(struct device *dev, 850 struct device_attribute *attr, char *buf) 851 { 852 int ret; 853 u8 value; 854 struct ab8500 *ab8500; 855 856 ab8500 = dev_get_drvdata(dev); 857 ret = get_register_interruptible(ab8500, AB8500_RTC, 858 AB8500_SWITCH_OFF_STATUS, &value); 859 if (ret < 0) 860 return ret; 861 return sprintf(buf, "%#x\n", value); 862 } 863 864 /* use mask and set to override the register turn_on_stat value */ 865 void ab8500_override_turn_on_stat(u8 mask, u8 set) 866 { 867 spin_lock(&on_stat_lock); 868 turn_on_stat_mask = mask; 869 turn_on_stat_set = set; 870 spin_unlock(&on_stat_lock); 871 } 872 873 /* 874 * ab8500 has turned on due to (TURN_ON_STATUS): 875 * 0x01 PORnVbat 876 * 0x02 PonKey1dbF 877 * 0x04 PonKey2dbF 878 * 0x08 RTCAlarm 879 * 0x10 MainChDet 880 * 0x20 VbusDet 881 * 0x40 UsbIDDetect 882 * 0x80 Reserved 883 */ 884 static ssize_t show_turn_on_status(struct device *dev, 885 struct device_attribute *attr, char *buf) 886 { 887 int ret; 888 u8 value; 889 struct ab8500 *ab8500; 890 891 ab8500 = dev_get_drvdata(dev); 892 ret = get_register_interruptible(ab8500, AB8500_SYS_CTRL1_BLOCK, 893 AB8500_TURN_ON_STATUS, &value); 894 if (ret < 0) 895 return ret; 896 897 /* 898 * In L9540, turn_on_status register is not updated correctly if 899 * the device is rebooted with AC/USB charger connected. Due to 900 * this, the device boots android instead of entering into charge 901 * only mode. Read the AC/USB status register to detect the charger 902 * presence and update the turn on status manually. 903 */ 904 if (is_ab9540(ab8500)) { 905 spin_lock(&on_stat_lock); 906 value = (value & turn_on_stat_mask) | turn_on_stat_set; 907 spin_unlock(&on_stat_lock); 908 } 909 910 return sprintf(buf, "%#x\n", value); 911 } 912 913 static ssize_t show_turn_on_status_2(struct device *dev, 914 struct device_attribute *attr, char *buf) 915 { 916 int ret; 917 u8 value; 918 struct ab8500 *ab8500; 919 920 ab8500 = dev_get_drvdata(dev); 921 ret = get_register_interruptible(ab8500, AB8500_SYS_CTRL1_BLOCK, 922 AB8505_TURN_ON_STATUS_2, &value); 923 if (ret < 0) 924 return ret; 925 return sprintf(buf, "%#x\n", (value & 0x1)); 926 } 927 928 static ssize_t show_ab9540_dbbrstn(struct device *dev, 929 struct device_attribute *attr, char *buf) 930 { 931 struct ab8500 *ab8500; 932 int ret; 933 u8 value; 934 935 ab8500 = dev_get_drvdata(dev); 936 937 ret = get_register_interruptible(ab8500, AB8500_REGU_CTRL2, 938 AB9540_MODEM_CTRL2_REG, &value); 939 if (ret < 0) 940 return ret; 941 942 return sprintf(buf, "%d\n", 943 (value & AB9540_MODEM_CTRL2_SWDBBRSTN_BIT) ? 1 : 0); 944 } 945 946 static ssize_t store_ab9540_dbbrstn(struct device *dev, 947 struct device_attribute *attr, const char *buf, size_t count) 948 { 949 struct ab8500 *ab8500; 950 int ret = count; 951 int err; 952 u8 bitvalues; 953 954 ab8500 = dev_get_drvdata(dev); 955 956 if (count > 0) { 957 switch (buf[0]) { 958 case '0': 959 bitvalues = 0; 960 break; 961 case '1': 962 bitvalues = AB9540_MODEM_CTRL2_SWDBBRSTN_BIT; 963 break; 964 default: 965 goto exit; 966 } 967 968 err = mask_and_set_register_interruptible(ab8500, 969 AB8500_REGU_CTRL2, AB9540_MODEM_CTRL2_REG, 970 AB9540_MODEM_CTRL2_SWDBBRSTN_BIT, bitvalues); 971 if (err) 972 dev_info(ab8500->dev, 973 "Failed to set DBBRSTN %c, err %#x\n", 974 buf[0], err); 975 } 976 977 exit: 978 return ret; 979 } 980 981 static DEVICE_ATTR(chip_id, S_IRUGO, show_chip_id, NULL); 982 static DEVICE_ATTR(switch_off_status, S_IRUGO, show_switch_off_status, NULL); 983 static DEVICE_ATTR(turn_on_status, S_IRUGO, show_turn_on_status, NULL); 984 static DEVICE_ATTR(turn_on_status_2, S_IRUGO, show_turn_on_status_2, NULL); 985 static DEVICE_ATTR(dbbrstn, S_IRUGO | S_IWUSR, 986 show_ab9540_dbbrstn, store_ab9540_dbbrstn); 987 988 static struct attribute *ab8500_sysfs_entries[] = { 989 &dev_attr_chip_id.attr, 990 &dev_attr_switch_off_status.attr, 991 &dev_attr_turn_on_status.attr, 992 NULL, 993 }; 994 995 static struct attribute *ab8505_sysfs_entries[] = { 996 &dev_attr_turn_on_status_2.attr, 997 NULL, 998 }; 999 1000 static struct attribute *ab9540_sysfs_entries[] = { 1001 &dev_attr_chip_id.attr, 1002 &dev_attr_switch_off_status.attr, 1003 &dev_attr_turn_on_status.attr, 1004 &dev_attr_dbbrstn.attr, 1005 NULL, 1006 }; 1007 1008 static const struct attribute_group ab8500_attr_group = { 1009 .attrs = ab8500_sysfs_entries, 1010 }; 1011 1012 static const struct attribute_group ab8505_attr_group = { 1013 .attrs = ab8505_sysfs_entries, 1014 }; 1015 1016 static const struct attribute_group ab9540_attr_group = { 1017 .attrs = ab9540_sysfs_entries, 1018 }; 1019 1020 static int ab8500_probe(struct platform_device *pdev) 1021 { 1022 static const char * const switch_off_status[] = { 1023 "Swoff bit programming", 1024 "Thermal protection activation", 1025 "Vbat lower then BattOk falling threshold", 1026 "Watchdog expired", 1027 "Non presence of 32kHz clock", 1028 "Battery level lower than power on reset threshold", 1029 "Power on key 1 pressed longer than 10 seconds", 1030 "DB8500 thermal shutdown"}; 1031 static const char * const turn_on_status[] = { 1032 "Battery rising (Vbat)", 1033 "Power On Key 1 dbF", 1034 "Power On Key 2 dbF", 1035 "RTC Alarm", 1036 "Main Charger Detect", 1037 "Vbus Detect (USB)", 1038 "USB ID Detect", 1039 "UART Factory Mode Detect"}; 1040 const struct platform_device_id *platid = platform_get_device_id(pdev); 1041 enum ab8500_version version = AB8500_VERSION_UNDEFINED; 1042 struct device_node *np = pdev->dev.of_node; 1043 struct ab8500 *ab8500; 1044 struct resource *resource; 1045 int ret; 1046 int i; 1047 u8 value; 1048 1049 ab8500 = devm_kzalloc(&pdev->dev, sizeof(*ab8500), GFP_KERNEL); 1050 if (!ab8500) 1051 return -ENOMEM; 1052 1053 ab8500->dev = &pdev->dev; 1054 1055 resource = platform_get_resource(pdev, IORESOURCE_IRQ, 0); 1056 if (!resource) { 1057 dev_err(&pdev->dev, "no IRQ resource\n"); 1058 return -ENODEV; 1059 } 1060 1061 ab8500->irq = resource->start; 1062 1063 ab8500->read = ab8500_prcmu_read; 1064 ab8500->write = ab8500_prcmu_write; 1065 ab8500->write_masked = ab8500_prcmu_write_masked; 1066 1067 mutex_init(&ab8500->lock); 1068 mutex_init(&ab8500->irq_lock); 1069 atomic_set(&ab8500->transfer_ongoing, 0); 1070 1071 platform_set_drvdata(pdev, ab8500); 1072 1073 if (platid) 1074 version = platid->driver_data; 1075 1076 if (version != AB8500_VERSION_UNDEFINED) 1077 ab8500->version = version; 1078 else { 1079 ret = get_register_interruptible(ab8500, AB8500_MISC, 1080 AB8500_IC_NAME_REG, &value); 1081 if (ret < 0) { 1082 dev_err(&pdev->dev, "could not probe HW\n"); 1083 return ret; 1084 } 1085 1086 ab8500->version = value; 1087 } 1088 1089 ret = get_register_interruptible(ab8500, AB8500_MISC, 1090 AB8500_REV_REG, &value); 1091 if (ret < 0) 1092 return ret; 1093 1094 ab8500->chip_id = value; 1095 1096 dev_info(ab8500->dev, "detected chip, %s rev. %1x.%1x\n", 1097 ab8500_version_str[ab8500->version], 1098 ab8500->chip_id >> 4, 1099 ab8500->chip_id & 0x0F); 1100 1101 /* Configure AB8540 */ 1102 if (is_ab8540(ab8500)) { 1103 ab8500->mask_size = AB8540_NUM_IRQ_REGS; 1104 ab8500->irq_reg_offset = ab8540_irq_regoffset; 1105 ab8500->it_latchhier_num = AB8540_IT_LATCHHIER_NUM; 1106 } /* Configure AB8500 or AB9540 IRQ */ 1107 else if (is_ab9540(ab8500) || is_ab8505(ab8500)) { 1108 ab8500->mask_size = AB9540_NUM_IRQ_REGS; 1109 ab8500->irq_reg_offset = ab9540_irq_regoffset; 1110 ab8500->it_latchhier_num = AB8500_IT_LATCHHIER_NUM; 1111 } else { 1112 ab8500->mask_size = AB8500_NUM_IRQ_REGS; 1113 ab8500->irq_reg_offset = ab8500_irq_regoffset; 1114 ab8500->it_latchhier_num = AB8500_IT_LATCHHIER_NUM; 1115 } 1116 ab8500->mask = devm_kzalloc(&pdev->dev, ab8500->mask_size, 1117 GFP_KERNEL); 1118 if (!ab8500->mask) 1119 return -ENOMEM; 1120 ab8500->oldmask = devm_kzalloc(&pdev->dev, ab8500->mask_size, 1121 GFP_KERNEL); 1122 if (!ab8500->oldmask) 1123 return -ENOMEM; 1124 1125 /* 1126 * ab8500 has switched off due to (SWITCH_OFF_STATUS): 1127 * 0x01 Swoff bit programming 1128 * 0x02 Thermal protection activation 1129 * 0x04 Vbat lower then BattOk falling threshold 1130 * 0x08 Watchdog expired 1131 * 0x10 Non presence of 32kHz clock 1132 * 0x20 Battery level lower than power on reset threshold 1133 * 0x40 Power on key 1 pressed longer than 10 seconds 1134 * 0x80 DB8500 thermal shutdown 1135 */ 1136 1137 ret = get_register_interruptible(ab8500, AB8500_RTC, 1138 AB8500_SWITCH_OFF_STATUS, &value); 1139 if (ret < 0) 1140 return ret; 1141 dev_info(ab8500->dev, "switch off cause(s) (%#x): ", value); 1142 1143 if (value) { 1144 for (i = 0; i < ARRAY_SIZE(switch_off_status); i++) { 1145 if (value & 1) 1146 pr_cont(" \"%s\"", switch_off_status[i]); 1147 value = value >> 1; 1148 1149 } 1150 pr_cont("\n"); 1151 } else { 1152 pr_cont(" None\n"); 1153 } 1154 ret = get_register_interruptible(ab8500, AB8500_SYS_CTRL1_BLOCK, 1155 AB8500_TURN_ON_STATUS, &value); 1156 if (ret < 0) 1157 return ret; 1158 dev_info(ab8500->dev, "turn on reason(s) (%#x): ", value); 1159 1160 if (value) { 1161 for (i = 0; i < ARRAY_SIZE(turn_on_status); i++) { 1162 if (value & 1) 1163 pr_cont("\"%s\" ", turn_on_status[i]); 1164 value = value >> 1; 1165 } 1166 pr_cont("\n"); 1167 } else { 1168 pr_cont("None\n"); 1169 } 1170 1171 if (is_ab9540(ab8500)) { 1172 ret = get_register_interruptible(ab8500, AB8500_CHARGER, 1173 AB8500_CH_USBCH_STAT1_REG, &value); 1174 if (ret < 0) 1175 return ret; 1176 if ((value & VBUS_DET_DBNC1) && (value & VBUS_DET_DBNC100)) 1177 ab8500_override_turn_on_stat(~AB8500_POW_KEY_1_ON, 1178 AB8500_VBUS_DET); 1179 } 1180 1181 /* Clear and mask all interrupts */ 1182 for (i = 0; i < ab8500->mask_size; i++) { 1183 /* 1184 * Interrupt register 12 doesn't exist prior to AB8500 version 1185 * 2.0 1186 */ 1187 if (ab8500->irq_reg_offset[i] == 11 && 1188 is_ab8500_1p1_or_earlier(ab8500)) 1189 continue; 1190 1191 if (ab8500->irq_reg_offset[i] < 0) 1192 continue; 1193 1194 get_register_interruptible(ab8500, AB8500_INTERRUPT, 1195 AB8500_IT_LATCH1_REG + ab8500->irq_reg_offset[i], 1196 &value); 1197 set_register_interruptible(ab8500, AB8500_INTERRUPT, 1198 AB8500_IT_MASK1_REG + ab8500->irq_reg_offset[i], 0xff); 1199 } 1200 1201 ret = abx500_register_ops(ab8500->dev, &ab8500_ops); 1202 if (ret) 1203 return ret; 1204 1205 for (i = 0; i < ab8500->mask_size; i++) 1206 ab8500->mask[i] = ab8500->oldmask[i] = 0xff; 1207 1208 ret = ab8500_irq_init(ab8500, np); 1209 if (ret) 1210 return ret; 1211 1212 ret = devm_request_threaded_irq(&pdev->dev, ab8500->irq, NULL, 1213 ab8500_hierarchical_irq, 1214 IRQF_ONESHOT | IRQF_NO_SUSPEND, 1215 "ab8500", ab8500); 1216 if (ret) 1217 return ret; 1218 1219 if (is_ab9540(ab8500)) 1220 ret = mfd_add_devices(ab8500->dev, 0, ab9540_devs, 1221 ARRAY_SIZE(ab9540_devs), NULL, 1222 0, ab8500->domain); 1223 else if (is_ab8540(ab8500)) { 1224 ret = mfd_add_devices(ab8500->dev, 0, ab8540_devs, 1225 ARRAY_SIZE(ab8540_devs), NULL, 1226 0, ab8500->domain); 1227 if (ret) 1228 return ret; 1229 1230 if (is_ab8540_1p2_or_earlier(ab8500)) 1231 ret = mfd_add_devices(ab8500->dev, 0, ab8540_cut1_devs, 1232 ARRAY_SIZE(ab8540_cut1_devs), NULL, 1233 0, ab8500->domain); 1234 else /* ab8540 >= cut2 */ 1235 ret = mfd_add_devices(ab8500->dev, 0, ab8540_cut2_devs, 1236 ARRAY_SIZE(ab8540_cut2_devs), NULL, 1237 0, ab8500->domain); 1238 } else if (is_ab8505(ab8500)) 1239 ret = mfd_add_devices(ab8500->dev, 0, ab8505_devs, 1240 ARRAY_SIZE(ab8505_devs), NULL, 1241 0, ab8500->domain); 1242 else 1243 ret = mfd_add_devices(ab8500->dev, 0, ab8500_devs, 1244 ARRAY_SIZE(ab8500_devs), NULL, 1245 0, ab8500->domain); 1246 if (ret) 1247 return ret; 1248 1249 if (!no_bm) { 1250 /* Add battery management devices */ 1251 ret = mfd_add_devices(ab8500->dev, 0, ab8500_bm_devs, 1252 ARRAY_SIZE(ab8500_bm_devs), NULL, 1253 0, ab8500->domain); 1254 if (ret) 1255 dev_err(ab8500->dev, "error adding bm devices\n"); 1256 } 1257 1258 if (((is_ab8505(ab8500) || is_ab9540(ab8500)) && 1259 ab8500->chip_id >= AB8500_CUT2P0) || is_ab8540(ab8500)) 1260 ret = sysfs_create_group(&ab8500->dev->kobj, 1261 &ab9540_attr_group); 1262 else 1263 ret = sysfs_create_group(&ab8500->dev->kobj, 1264 &ab8500_attr_group); 1265 1266 if ((is_ab8505(ab8500) || is_ab9540(ab8500)) && 1267 ab8500->chip_id >= AB8500_CUT2P0) 1268 ret = sysfs_create_group(&ab8500->dev->kobj, 1269 &ab8505_attr_group); 1270 1271 if (ret) 1272 dev_err(ab8500->dev, "error creating sysfs entries\n"); 1273 1274 return ret; 1275 } 1276 1277 static const struct platform_device_id ab8500_id[] = { 1278 { "ab8500-core", AB8500_VERSION_AB8500 }, 1279 { "ab8505-i2c", AB8500_VERSION_AB8505 }, 1280 { "ab9540-i2c", AB8500_VERSION_AB9540 }, 1281 { "ab8540-i2c", AB8500_VERSION_AB8540 }, 1282 { } 1283 }; 1284 1285 static struct platform_driver ab8500_core_driver = { 1286 .driver = { 1287 .name = "ab8500-core", 1288 .suppress_bind_attrs = true, 1289 }, 1290 .probe = ab8500_probe, 1291 .id_table = ab8500_id, 1292 }; 1293 1294 static int __init ab8500_core_init(void) 1295 { 1296 return platform_driver_register(&ab8500_core_driver); 1297 } 1298 core_initcall(ab8500_core_init); 1299