1 /* 2 * Base driver for Maxim MAX8925 3 * 4 * Copyright (C) 2009-2010 Marvell International Ltd. 5 * Haojian Zhuang <haojian.zhuang@marvell.com> 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License version 2 as 9 * published by the Free Software Foundation. 10 */ 11 12 #include <linux/kernel.h> 13 #include <linux/module.h> 14 #include <linux/i2c.h> 15 #include <linux/irq.h> 16 #include <linux/interrupt.h> 17 #include <linux/platform_device.h> 18 #include <linux/mfd/core.h> 19 #include <linux/mfd/max8925.h> 20 21 static struct resource backlight_resources[] = { 22 { 23 .name = "max8925-backlight", 24 .start = MAX8925_WLED_MODE_CNTL, 25 .end = MAX8925_WLED_CNTL, 26 .flags = IORESOURCE_IO, 27 }, 28 }; 29 30 static struct mfd_cell backlight_devs[] = { 31 { 32 .name = "max8925-backlight", 33 .num_resources = 1, 34 .resources = &backlight_resources[0], 35 .id = -1, 36 }, 37 }; 38 39 static struct resource touch_resources[] = { 40 { 41 .name = "max8925-tsc", 42 .start = MAX8925_TSC_IRQ, 43 .end = MAX8925_ADC_RES_END, 44 .flags = IORESOURCE_IO, 45 }, 46 }; 47 48 static struct mfd_cell touch_devs[] = { 49 { 50 .name = "max8925-touch", 51 .num_resources = 1, 52 .resources = &touch_resources[0], 53 .id = -1, 54 }, 55 }; 56 57 static struct resource power_supply_resources[] = { 58 { 59 .name = "max8925-power", 60 .start = MAX8925_CHG_IRQ1, 61 .end = MAX8925_CHG_IRQ1_MASK, 62 .flags = IORESOURCE_IO, 63 }, 64 }; 65 66 static struct mfd_cell power_devs[] = { 67 { 68 .name = "max8925-power", 69 .num_resources = 1, 70 .resources = &power_supply_resources[0], 71 .id = -1, 72 }, 73 }; 74 75 static struct resource rtc_resources[] = { 76 { 77 .name = "max8925-rtc", 78 .start = MAX8925_RTC_IRQ, 79 .end = MAX8925_RTC_IRQ_MASK, 80 .flags = IORESOURCE_IO, 81 }, 82 }; 83 84 static struct mfd_cell rtc_devs[] = { 85 { 86 .name = "max8925-rtc", 87 .num_resources = 1, 88 .resources = &rtc_resources[0], 89 .id = -1, 90 }, 91 }; 92 93 #define MAX8925_REG_RESOURCE(_start, _end) \ 94 { \ 95 .start = MAX8925_##_start, \ 96 .end = MAX8925_##_end, \ 97 .flags = IORESOURCE_IO, \ 98 } 99 100 static struct resource regulator_resources[] = { 101 MAX8925_REG_RESOURCE(SDCTL1, SDCTL1), 102 MAX8925_REG_RESOURCE(SDCTL2, SDCTL2), 103 MAX8925_REG_RESOURCE(SDCTL3, SDCTL3), 104 MAX8925_REG_RESOURCE(LDOCTL1, LDOCTL1), 105 MAX8925_REG_RESOURCE(LDOCTL2, LDOCTL2), 106 MAX8925_REG_RESOURCE(LDOCTL3, LDOCTL3), 107 MAX8925_REG_RESOURCE(LDOCTL4, LDOCTL4), 108 MAX8925_REG_RESOURCE(LDOCTL5, LDOCTL5), 109 MAX8925_REG_RESOURCE(LDOCTL6, LDOCTL6), 110 MAX8925_REG_RESOURCE(LDOCTL7, LDOCTL7), 111 MAX8925_REG_RESOURCE(LDOCTL8, LDOCTL8), 112 MAX8925_REG_RESOURCE(LDOCTL9, LDOCTL9), 113 MAX8925_REG_RESOURCE(LDOCTL10, LDOCTL10), 114 MAX8925_REG_RESOURCE(LDOCTL11, LDOCTL11), 115 MAX8925_REG_RESOURCE(LDOCTL12, LDOCTL12), 116 MAX8925_REG_RESOURCE(LDOCTL13, LDOCTL13), 117 MAX8925_REG_RESOURCE(LDOCTL14, LDOCTL14), 118 MAX8925_REG_RESOURCE(LDOCTL15, LDOCTL15), 119 MAX8925_REG_RESOURCE(LDOCTL16, LDOCTL16), 120 MAX8925_REG_RESOURCE(LDOCTL17, LDOCTL17), 121 MAX8925_REG_RESOURCE(LDOCTL18, LDOCTL18), 122 MAX8925_REG_RESOURCE(LDOCTL19, LDOCTL19), 123 MAX8925_REG_RESOURCE(LDOCTL20, LDOCTL20), 124 }; 125 126 #define MAX8925_REG_DEVS(_id) \ 127 { \ 128 .name = "max8925-regulator", \ 129 .num_resources = 1, \ 130 .resources = ®ulator_resources[MAX8925_ID_##_id], \ 131 .id = MAX8925_ID_##_id, \ 132 } 133 134 static struct mfd_cell regulator_devs[] = { 135 MAX8925_REG_DEVS(SD1), 136 MAX8925_REG_DEVS(SD2), 137 MAX8925_REG_DEVS(SD3), 138 MAX8925_REG_DEVS(LDO1), 139 MAX8925_REG_DEVS(LDO2), 140 MAX8925_REG_DEVS(LDO3), 141 MAX8925_REG_DEVS(LDO4), 142 MAX8925_REG_DEVS(LDO5), 143 MAX8925_REG_DEVS(LDO6), 144 MAX8925_REG_DEVS(LDO7), 145 MAX8925_REG_DEVS(LDO8), 146 MAX8925_REG_DEVS(LDO9), 147 MAX8925_REG_DEVS(LDO10), 148 MAX8925_REG_DEVS(LDO11), 149 MAX8925_REG_DEVS(LDO12), 150 MAX8925_REG_DEVS(LDO13), 151 MAX8925_REG_DEVS(LDO14), 152 MAX8925_REG_DEVS(LDO15), 153 MAX8925_REG_DEVS(LDO16), 154 MAX8925_REG_DEVS(LDO17), 155 MAX8925_REG_DEVS(LDO18), 156 MAX8925_REG_DEVS(LDO19), 157 MAX8925_REG_DEVS(LDO20), 158 }; 159 160 enum { 161 FLAGS_ADC = 1, /* register in ADC component */ 162 FLAGS_RTC, /* register in RTC component */ 163 }; 164 165 struct max8925_irq_data { 166 int reg; 167 int mask_reg; 168 int enable; /* enable or not */ 169 int offs; /* bit offset in mask register */ 170 int flags; 171 int tsc_irq; 172 }; 173 174 static struct max8925_irq_data max8925_irqs[] = { 175 [MAX8925_IRQ_VCHG_DC_OVP] = { 176 .reg = MAX8925_CHG_IRQ1, 177 .mask_reg = MAX8925_CHG_IRQ1_MASK, 178 .offs = 1 << 0, 179 }, 180 [MAX8925_IRQ_VCHG_DC_F] = { 181 .reg = MAX8925_CHG_IRQ1, 182 .mask_reg = MAX8925_CHG_IRQ1_MASK, 183 .offs = 1 << 1, 184 }, 185 [MAX8925_IRQ_VCHG_DC_R] = { 186 .reg = MAX8925_CHG_IRQ1, 187 .mask_reg = MAX8925_CHG_IRQ1_MASK, 188 .offs = 1 << 2, 189 }, 190 [MAX8925_IRQ_VCHG_USB_OVP] = { 191 .reg = MAX8925_CHG_IRQ1, 192 .mask_reg = MAX8925_CHG_IRQ1_MASK, 193 .offs = 1 << 3, 194 }, 195 [MAX8925_IRQ_VCHG_USB_F] = { 196 .reg = MAX8925_CHG_IRQ1, 197 .mask_reg = MAX8925_CHG_IRQ1_MASK, 198 .offs = 1 << 4, 199 }, 200 [MAX8925_IRQ_VCHG_USB_R] = { 201 .reg = MAX8925_CHG_IRQ1, 202 .mask_reg = MAX8925_CHG_IRQ1_MASK, 203 .offs = 1 << 5, 204 }, 205 [MAX8925_IRQ_VCHG_THM_OK_R] = { 206 .reg = MAX8925_CHG_IRQ2, 207 .mask_reg = MAX8925_CHG_IRQ2_MASK, 208 .offs = 1 << 0, 209 }, 210 [MAX8925_IRQ_VCHG_THM_OK_F] = { 211 .reg = MAX8925_CHG_IRQ2, 212 .mask_reg = MAX8925_CHG_IRQ2_MASK, 213 .offs = 1 << 1, 214 }, 215 [MAX8925_IRQ_VCHG_SYSLOW_F] = { 216 .reg = MAX8925_CHG_IRQ2, 217 .mask_reg = MAX8925_CHG_IRQ2_MASK, 218 .offs = 1 << 2, 219 }, 220 [MAX8925_IRQ_VCHG_SYSLOW_R] = { 221 .reg = MAX8925_CHG_IRQ2, 222 .mask_reg = MAX8925_CHG_IRQ2_MASK, 223 .offs = 1 << 3, 224 }, 225 [MAX8925_IRQ_VCHG_RST] = { 226 .reg = MAX8925_CHG_IRQ2, 227 .mask_reg = MAX8925_CHG_IRQ2_MASK, 228 .offs = 1 << 4, 229 }, 230 [MAX8925_IRQ_VCHG_DONE] = { 231 .reg = MAX8925_CHG_IRQ2, 232 .mask_reg = MAX8925_CHG_IRQ2_MASK, 233 .offs = 1 << 5, 234 }, 235 [MAX8925_IRQ_VCHG_TOPOFF] = { 236 .reg = MAX8925_CHG_IRQ2, 237 .mask_reg = MAX8925_CHG_IRQ2_MASK, 238 .offs = 1 << 6, 239 }, 240 [MAX8925_IRQ_VCHG_TMR_FAULT] = { 241 .reg = MAX8925_CHG_IRQ2, 242 .mask_reg = MAX8925_CHG_IRQ2_MASK, 243 .offs = 1 << 7, 244 }, 245 [MAX8925_IRQ_GPM_RSTIN] = { 246 .reg = MAX8925_ON_OFF_IRQ1, 247 .mask_reg = MAX8925_ON_OFF_IRQ1_MASK, 248 .offs = 1 << 0, 249 }, 250 [MAX8925_IRQ_GPM_MPL] = { 251 .reg = MAX8925_ON_OFF_IRQ1, 252 .mask_reg = MAX8925_ON_OFF_IRQ1_MASK, 253 .offs = 1 << 1, 254 }, 255 [MAX8925_IRQ_GPM_SW_3SEC] = { 256 .reg = MAX8925_ON_OFF_IRQ1, 257 .mask_reg = MAX8925_ON_OFF_IRQ1_MASK, 258 .offs = 1 << 2, 259 }, 260 [MAX8925_IRQ_GPM_EXTON_F] = { 261 .reg = MAX8925_ON_OFF_IRQ1, 262 .mask_reg = MAX8925_ON_OFF_IRQ1_MASK, 263 .offs = 1 << 3, 264 }, 265 [MAX8925_IRQ_GPM_EXTON_R] = { 266 .reg = MAX8925_ON_OFF_IRQ1, 267 .mask_reg = MAX8925_ON_OFF_IRQ1_MASK, 268 .offs = 1 << 4, 269 }, 270 [MAX8925_IRQ_GPM_SW_1SEC] = { 271 .reg = MAX8925_ON_OFF_IRQ1, 272 .mask_reg = MAX8925_ON_OFF_IRQ1_MASK, 273 .offs = 1 << 5, 274 }, 275 [MAX8925_IRQ_GPM_SW_F] = { 276 .reg = MAX8925_ON_OFF_IRQ1, 277 .mask_reg = MAX8925_ON_OFF_IRQ1_MASK, 278 .offs = 1 << 6, 279 }, 280 [MAX8925_IRQ_GPM_SW_R] = { 281 .reg = MAX8925_ON_OFF_IRQ1, 282 .mask_reg = MAX8925_ON_OFF_IRQ1_MASK, 283 .offs = 1 << 7, 284 }, 285 [MAX8925_IRQ_GPM_SYSCKEN_F] = { 286 .reg = MAX8925_ON_OFF_IRQ2, 287 .mask_reg = MAX8925_ON_OFF_IRQ2_MASK, 288 .offs = 1 << 0, 289 }, 290 [MAX8925_IRQ_GPM_SYSCKEN_R] = { 291 .reg = MAX8925_ON_OFF_IRQ2, 292 .mask_reg = MAX8925_ON_OFF_IRQ2_MASK, 293 .offs = 1 << 1, 294 }, 295 [MAX8925_IRQ_RTC_ALARM1] = { 296 .reg = MAX8925_RTC_IRQ, 297 .mask_reg = MAX8925_RTC_IRQ_MASK, 298 .offs = 1 << 2, 299 .flags = FLAGS_RTC, 300 }, 301 [MAX8925_IRQ_RTC_ALARM0] = { 302 .reg = MAX8925_RTC_IRQ, 303 .mask_reg = MAX8925_RTC_IRQ_MASK, 304 .offs = 1 << 3, 305 .flags = FLAGS_RTC, 306 }, 307 [MAX8925_IRQ_TSC_STICK] = { 308 .reg = MAX8925_TSC_IRQ, 309 .mask_reg = MAX8925_TSC_IRQ_MASK, 310 .offs = 1 << 0, 311 .flags = FLAGS_ADC, 312 .tsc_irq = 1, 313 }, 314 [MAX8925_IRQ_TSC_NSTICK] = { 315 .reg = MAX8925_TSC_IRQ, 316 .mask_reg = MAX8925_TSC_IRQ_MASK, 317 .offs = 1 << 1, 318 .flags = FLAGS_ADC, 319 .tsc_irq = 1, 320 }, 321 }; 322 323 static inline struct max8925_irq_data *irq_to_max8925(struct max8925_chip *chip, 324 int irq) 325 { 326 return &max8925_irqs[irq - chip->irq_base]; 327 } 328 329 static irqreturn_t max8925_irq(int irq, void *data) 330 { 331 struct max8925_chip *chip = data; 332 struct max8925_irq_data *irq_data; 333 struct i2c_client *i2c; 334 int read_reg = -1, value = 0; 335 int i; 336 337 for (i = 0; i < ARRAY_SIZE(max8925_irqs); i++) { 338 irq_data = &max8925_irqs[i]; 339 /* TSC IRQ should be serviced in max8925_tsc_irq() */ 340 if (irq_data->tsc_irq) 341 continue; 342 if (irq_data->flags == FLAGS_RTC) 343 i2c = chip->rtc; 344 else if (irq_data->flags == FLAGS_ADC) 345 i2c = chip->adc; 346 else 347 i2c = chip->i2c; 348 if (read_reg != irq_data->reg) { 349 read_reg = irq_data->reg; 350 value = max8925_reg_read(i2c, irq_data->reg); 351 } 352 if (value & irq_data->enable) 353 handle_nested_irq(chip->irq_base + i); 354 } 355 return IRQ_HANDLED; 356 } 357 358 static irqreturn_t max8925_tsc_irq(int irq, void *data) 359 { 360 struct max8925_chip *chip = data; 361 struct max8925_irq_data *irq_data; 362 struct i2c_client *i2c; 363 int read_reg = -1, value = 0; 364 int i; 365 366 for (i = 0; i < ARRAY_SIZE(max8925_irqs); i++) { 367 irq_data = &max8925_irqs[i]; 368 /* non TSC IRQ should be serviced in max8925_irq() */ 369 if (!irq_data->tsc_irq) 370 continue; 371 if (irq_data->flags == FLAGS_RTC) 372 i2c = chip->rtc; 373 else if (irq_data->flags == FLAGS_ADC) 374 i2c = chip->adc; 375 else 376 i2c = chip->i2c; 377 if (read_reg != irq_data->reg) { 378 read_reg = irq_data->reg; 379 value = max8925_reg_read(i2c, irq_data->reg); 380 } 381 if (value & irq_data->enable) 382 handle_nested_irq(chip->irq_base + i); 383 } 384 return IRQ_HANDLED; 385 } 386 387 static void max8925_irq_lock(unsigned int irq) 388 { 389 struct max8925_chip *chip = get_irq_chip_data(irq); 390 391 mutex_lock(&chip->irq_lock); 392 } 393 394 static void max8925_irq_sync_unlock(unsigned int irq) 395 { 396 struct max8925_chip *chip = get_irq_chip_data(irq); 397 struct max8925_irq_data *irq_data; 398 static unsigned char cache_chg[2] = {0xff, 0xff}; 399 static unsigned char cache_on[2] = {0xff, 0xff}; 400 static unsigned char cache_rtc = 0xff, cache_tsc = 0xff; 401 unsigned char irq_chg[2], irq_on[2]; 402 unsigned char irq_rtc, irq_tsc; 403 int i; 404 405 /* Load cached value. In initial, all IRQs are masked */ 406 irq_chg[0] = cache_chg[0]; 407 irq_chg[1] = cache_chg[1]; 408 irq_on[0] = cache_on[0]; 409 irq_on[1] = cache_on[1]; 410 irq_rtc = cache_rtc; 411 irq_tsc = cache_tsc; 412 for (i = 0; i < ARRAY_SIZE(max8925_irqs); i++) { 413 irq_data = &max8925_irqs[i]; 414 switch (irq_data->mask_reg) { 415 case MAX8925_CHG_IRQ1_MASK: 416 irq_chg[0] &= irq_data->enable; 417 break; 418 case MAX8925_CHG_IRQ2_MASK: 419 irq_chg[1] &= irq_data->enable; 420 break; 421 case MAX8925_ON_OFF_IRQ1_MASK: 422 irq_on[0] &= irq_data->enable; 423 break; 424 case MAX8925_ON_OFF_IRQ2_MASK: 425 irq_on[1] &= irq_data->enable; 426 break; 427 case MAX8925_RTC_IRQ_MASK: 428 irq_rtc &= irq_data->enable; 429 break; 430 case MAX8925_TSC_IRQ_MASK: 431 irq_tsc &= irq_data->enable; 432 break; 433 default: 434 dev_err(chip->dev, "wrong IRQ\n"); 435 break; 436 } 437 } 438 /* update mask into registers */ 439 if (cache_chg[0] != irq_chg[0]) { 440 cache_chg[0] = irq_chg[0]; 441 max8925_reg_write(chip->i2c, MAX8925_CHG_IRQ1_MASK, 442 irq_chg[0]); 443 } 444 if (cache_chg[1] != irq_chg[1]) { 445 cache_chg[1] = irq_chg[1]; 446 max8925_reg_write(chip->i2c, MAX8925_CHG_IRQ2_MASK, 447 irq_chg[1]); 448 } 449 if (cache_on[0] != irq_on[0]) { 450 cache_on[0] = irq_on[0]; 451 max8925_reg_write(chip->i2c, MAX8925_ON_OFF_IRQ1_MASK, 452 irq_on[0]); 453 } 454 if (cache_on[1] != irq_on[1]) { 455 cache_on[1] = irq_on[1]; 456 max8925_reg_write(chip->i2c, MAX8925_ON_OFF_IRQ2_MASK, 457 irq_on[1]); 458 } 459 if (cache_rtc != irq_rtc) { 460 cache_rtc = irq_rtc; 461 max8925_reg_write(chip->rtc, MAX8925_RTC_IRQ_MASK, irq_rtc); 462 } 463 if (cache_tsc != irq_tsc) { 464 cache_tsc = irq_tsc; 465 max8925_reg_write(chip->adc, MAX8925_TSC_IRQ_MASK, irq_tsc); 466 } 467 468 mutex_unlock(&chip->irq_lock); 469 } 470 471 static void max8925_irq_enable(unsigned int irq) 472 { 473 struct max8925_chip *chip = get_irq_chip_data(irq); 474 max8925_irqs[irq - chip->irq_base].enable 475 = max8925_irqs[irq - chip->irq_base].offs; 476 } 477 478 static void max8925_irq_disable(unsigned int irq) 479 { 480 struct max8925_chip *chip = get_irq_chip_data(irq); 481 max8925_irqs[irq - chip->irq_base].enable = 0; 482 } 483 484 static struct irq_chip max8925_irq_chip = { 485 .name = "max8925", 486 .bus_lock = max8925_irq_lock, 487 .bus_sync_unlock = max8925_irq_sync_unlock, 488 .enable = max8925_irq_enable, 489 .disable = max8925_irq_disable, 490 }; 491 492 static int max8925_irq_init(struct max8925_chip *chip, int irq, 493 struct max8925_platform_data *pdata) 494 { 495 unsigned long flags = IRQF_TRIGGER_FALLING | IRQF_ONESHOT; 496 struct irq_desc *desc; 497 int i, ret; 498 int __irq; 499 500 if (!pdata || !pdata->irq_base) { 501 dev_warn(chip->dev, "No interrupt support on IRQ base\n"); 502 return -EINVAL; 503 } 504 /* clear all interrupts */ 505 max8925_reg_read(chip->i2c, MAX8925_CHG_IRQ1); 506 max8925_reg_read(chip->i2c, MAX8925_CHG_IRQ2); 507 max8925_reg_read(chip->i2c, MAX8925_ON_OFF_IRQ1); 508 max8925_reg_read(chip->i2c, MAX8925_ON_OFF_IRQ2); 509 max8925_reg_read(chip->rtc, MAX8925_RTC_IRQ); 510 max8925_reg_read(chip->adc, MAX8925_TSC_IRQ); 511 /* mask all interrupts except for TSC */ 512 max8925_reg_write(chip->rtc, MAX8925_ALARM0_CNTL, 0); 513 max8925_reg_write(chip->rtc, MAX8925_ALARM1_CNTL, 0); 514 max8925_reg_write(chip->i2c, MAX8925_CHG_IRQ1_MASK, 0xff); 515 max8925_reg_write(chip->i2c, MAX8925_CHG_IRQ2_MASK, 0xff); 516 max8925_reg_write(chip->i2c, MAX8925_ON_OFF_IRQ1_MASK, 0xff); 517 max8925_reg_write(chip->i2c, MAX8925_ON_OFF_IRQ2_MASK, 0xff); 518 max8925_reg_write(chip->rtc, MAX8925_RTC_IRQ_MASK, 0xff); 519 520 mutex_init(&chip->irq_lock); 521 chip->core_irq = irq; 522 chip->irq_base = pdata->irq_base; 523 desc = irq_to_desc(chip->core_irq); 524 525 /* register with genirq */ 526 for (i = 0; i < ARRAY_SIZE(max8925_irqs); i++) { 527 __irq = i + chip->irq_base; 528 set_irq_chip_data(__irq, chip); 529 set_irq_chip_and_handler(__irq, &max8925_irq_chip, 530 handle_edge_irq); 531 set_irq_nested_thread(__irq, 1); 532 #ifdef CONFIG_ARM 533 set_irq_flags(__irq, IRQF_VALID); 534 #else 535 set_irq_noprobe(__irq); 536 #endif 537 } 538 if (!irq) { 539 dev_warn(chip->dev, "No interrupt support on core IRQ\n"); 540 goto tsc_irq; 541 } 542 543 ret = request_threaded_irq(irq, NULL, max8925_irq, flags, 544 "max8925", chip); 545 if (ret) { 546 dev_err(chip->dev, "Failed to request core IRQ: %d\n", ret); 547 chip->core_irq = 0; 548 } 549 550 tsc_irq: 551 /* mask TSC interrupt */ 552 max8925_reg_write(chip->adc, MAX8925_TSC_IRQ_MASK, 0x0f); 553 554 if (!pdata->tsc_irq) { 555 dev_warn(chip->dev, "No interrupt support on TSC IRQ\n"); 556 return 0; 557 } 558 chip->tsc_irq = pdata->tsc_irq; 559 560 ret = request_threaded_irq(chip->tsc_irq, NULL, max8925_tsc_irq, 561 flags, "max8925-tsc", chip); 562 if (ret) { 563 dev_err(chip->dev, "Failed to request TSC IRQ: %d\n", ret); 564 chip->tsc_irq = 0; 565 } 566 return 0; 567 } 568 569 int __devinit max8925_device_init(struct max8925_chip *chip, 570 struct max8925_platform_data *pdata) 571 { 572 int ret; 573 574 max8925_irq_init(chip, chip->i2c->irq, pdata); 575 576 if (pdata && (pdata->power || pdata->touch)) { 577 /* enable ADC to control internal reference */ 578 max8925_set_bits(chip->i2c, MAX8925_RESET_CNFG, 1, 1); 579 /* enable internal reference for ADC */ 580 max8925_set_bits(chip->adc, MAX8925_TSC_CNFG1, 3, 2); 581 /* check for internal reference IRQ */ 582 do { 583 ret = max8925_reg_read(chip->adc, MAX8925_TSC_IRQ); 584 } while (ret & MAX8925_NREF_OK); 585 /* enaable ADC scheduler, interval is 1 second */ 586 max8925_set_bits(chip->adc, MAX8925_ADC_SCHED, 3, 2); 587 } 588 589 /* enable Momentary Power Loss */ 590 max8925_set_bits(chip->rtc, MAX8925_MPL_CNTL, 1 << 4, 1 << 4); 591 592 ret = mfd_add_devices(chip->dev, 0, &rtc_devs[0], 593 ARRAY_SIZE(rtc_devs), 594 &rtc_resources[0], 0); 595 if (ret < 0) { 596 dev_err(chip->dev, "Failed to add rtc subdev\n"); 597 goto out; 598 } 599 if (pdata && pdata->regulator[0]) { 600 ret = mfd_add_devices(chip->dev, 0, ®ulator_devs[0], 601 ARRAY_SIZE(regulator_devs), 602 ®ulator_resources[0], 0); 603 if (ret < 0) { 604 dev_err(chip->dev, "Failed to add regulator subdev\n"); 605 goto out_dev; 606 } 607 } 608 609 if (pdata && pdata->backlight) { 610 ret = mfd_add_devices(chip->dev, 0, &backlight_devs[0], 611 ARRAY_SIZE(backlight_devs), 612 &backlight_resources[0], 0); 613 if (ret < 0) { 614 dev_err(chip->dev, "Failed to add backlight subdev\n"); 615 goto out_dev; 616 } 617 } 618 619 if (pdata && pdata->power) { 620 ret = mfd_add_devices(chip->dev, 0, &power_devs[0], 621 ARRAY_SIZE(power_devs), 622 &power_supply_resources[0], 0); 623 if (ret < 0) { 624 dev_err(chip->dev, "Failed to add power supply " 625 "subdev\n"); 626 goto out_dev; 627 } 628 } 629 630 if (pdata && pdata->touch) { 631 ret = mfd_add_devices(chip->dev, 0, &touch_devs[0], 632 ARRAY_SIZE(touch_devs), 633 &touch_resources[0], 0); 634 if (ret < 0) { 635 dev_err(chip->dev, "Failed to add touch subdev\n"); 636 goto out_dev; 637 } 638 } 639 640 return 0; 641 out_dev: 642 mfd_remove_devices(chip->dev); 643 out: 644 return ret; 645 } 646 647 void __devexit max8925_device_exit(struct max8925_chip *chip) 648 { 649 if (chip->core_irq) 650 free_irq(chip->core_irq, chip); 651 if (chip->tsc_irq) 652 free_irq(chip->tsc_irq, chip); 653 mfd_remove_devices(chip->dev); 654 } 655 656 657 MODULE_DESCRIPTION("PMIC Driver for Maxim MAX8925"); 658 MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com"); 659 MODULE_LICENSE("GPL"); 660