1/* 2 * twl-regulator.c -- support regulators in twl4030/twl6030 family chips 3 * 4 * Copyright (C) 2008 David Brownell 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 */ 11 12#include <linux/module.h> 13#include <linux/init.h> 14#include <linux/err.h> 15#include <linux/delay.h> 16#include <linux/platform_device.h> 17#include <linux/regulator/driver.h> 18#include <linux/regulator/machine.h> 19#include <linux/i2c/twl.h> 20 21 22/* 23 * The TWL4030/TW5030/TPS659x0/TWL6030 family chips include power management, a 24 * USB OTG transceiver, an RTC, ADC, PWM, and lots more. Some versions 25 * include an audio codec, battery charger, and more voltage regulators. 26 * These chips are often used in OMAP-based systems. 27 * 28 * This driver implements software-based resource control for various 29 * voltage regulators. This is usually augmented with state machine 30 * based control. 31 */ 32 33struct twlreg_info { 34 /* start of regulator's PM_RECEIVER control register bank */ 35 u8 base; 36 37 /* twl resource ID, for resource control state machine */ 38 u8 id; 39 40 /* voltage in mV = table[VSEL]; table_len must be a power-of-two */ 41 u8 table_len; 42 const u16 *table; 43 44 /* regulator specific turn-on delay */ 45 u16 delay; 46 47 /* State REMAP default configuration */ 48 u8 remap; 49 50 /* chip constraints on regulator behavior */ 51 u16 min_mV; 52 u16 max_mV; 53 54 /* used by regulator core */ 55 struct regulator_desc desc; 56}; 57 58 59/* LDO control registers ... offset is from the base of its register bank. 60 * The first three registers of all power resource banks help hardware to 61 * manage the various resource groups. 62 */ 63/* Common offset in TWL4030/6030 */ 64#define VREG_GRP 0 65/* TWL4030 register offsets */ 66#define VREG_TYPE 1 67#define VREG_REMAP 2 68#define VREG_DEDICATED 3 /* LDO control */ 69/* TWL6030 register offsets */ 70#define VREG_TRANS 1 71#define VREG_STATE 2 72#define VREG_VOLTAGE 3 73/* TWL6030 Misc register offsets */ 74#define VREG_BC_ALL 1 75#define VREG_BC_REF 2 76#define VREG_BC_PROC 3 77#define VREG_BC_CLK_RST 4 78 79static inline int 80twlreg_read(struct twlreg_info *info, unsigned slave_subgp, unsigned offset) 81{ 82 u8 value; 83 int status; 84 85 status = twl_i2c_read_u8(slave_subgp, 86 &value, info->base + offset); 87 return (status < 0) ? status : value; 88} 89 90static inline int 91twlreg_write(struct twlreg_info *info, unsigned slave_subgp, unsigned offset, 92 u8 value) 93{ 94 return twl_i2c_write_u8(slave_subgp, 95 value, info->base + offset); 96} 97 98/*----------------------------------------------------------------------*/ 99 100/* generic power resource operations, which work on all regulators */ 101 102static int twlreg_grp(struct regulator_dev *rdev) 103{ 104 return twlreg_read(rdev_get_drvdata(rdev), TWL_MODULE_PM_RECEIVER, 105 VREG_GRP); 106} 107 108/* 109 * Enable/disable regulators by joining/leaving the P1 (processor) group. 110 * We assume nobody else is updating the DEV_GRP registers. 111 */ 112/* definition for 4030 family */ 113#define P3_GRP_4030 BIT(7) /* "peripherals" */ 114#define P2_GRP_4030 BIT(6) /* secondary processor, modem, etc */ 115#define P1_GRP_4030 BIT(5) /* CPU/Linux */ 116/* definition for 6030 family */ 117#define P3_GRP_6030 BIT(2) /* secondary processor, modem, etc */ 118#define P2_GRP_6030 BIT(1) /* "peripherals" */ 119#define P1_GRP_6030 BIT(0) /* CPU/Linux */ 120 121static int twlreg_is_enabled(struct regulator_dev *rdev) 122{ 123 int state = twlreg_grp(rdev); 124 125 if (state < 0) 126 return state; 127 128 if (twl_class_is_4030()) 129 state &= P1_GRP_4030; 130 else 131 state &= P1_GRP_6030; 132 return state; 133} 134 135static int twlreg_enable(struct regulator_dev *rdev) 136{ 137 struct twlreg_info *info = rdev_get_drvdata(rdev); 138 int grp; 139 int ret; 140 141 grp = twlreg_read(info, TWL_MODULE_PM_RECEIVER, VREG_GRP); 142 if (grp < 0) 143 return grp; 144 145 if (twl_class_is_4030()) 146 grp |= P1_GRP_4030; 147 else 148 grp |= P1_GRP_6030; 149 150 ret = twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_GRP, grp); 151 152 udelay(info->delay); 153 154 return ret; 155} 156 157static int twlreg_disable(struct regulator_dev *rdev) 158{ 159 struct twlreg_info *info = rdev_get_drvdata(rdev); 160 int grp; 161 162 grp = twlreg_read(info, TWL_MODULE_PM_RECEIVER, VREG_GRP); 163 if (grp < 0) 164 return grp; 165 166 if (twl_class_is_4030()) 167 grp &= ~(P1_GRP_4030 | P2_GRP_4030 | P3_GRP_4030); 168 else 169 grp &= ~(P1_GRP_6030 | P2_GRP_6030 | P3_GRP_6030); 170 171 return twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_GRP, grp); 172} 173 174static int twlreg_get_status(struct regulator_dev *rdev) 175{ 176 int state = twlreg_grp(rdev); 177 178 if (twl_class_is_6030()) 179 return 0; 180 181 if (state < 0) 182 return state; 183 state &= 0x0f; 184 185 /* assume state != WARM_RESET; we'd not be running... */ 186 if (!state) 187 return REGULATOR_STATUS_OFF; 188 return (state & BIT(3)) 189 ? REGULATOR_STATUS_NORMAL 190 : REGULATOR_STATUS_STANDBY; 191} 192 193static int twlreg_set_mode(struct regulator_dev *rdev, unsigned mode) 194{ 195 struct twlreg_info *info = rdev_get_drvdata(rdev); 196 unsigned message; 197 int status; 198 199 if (twl_class_is_6030()) 200 return 0; 201 202 /* We can only set the mode through state machine commands... */ 203 switch (mode) { 204 case REGULATOR_MODE_NORMAL: 205 message = MSG_SINGULAR(DEV_GRP_P1, info->id, RES_STATE_ACTIVE); 206 break; 207 case REGULATOR_MODE_STANDBY: 208 message = MSG_SINGULAR(DEV_GRP_P1, info->id, RES_STATE_SLEEP); 209 break; 210 default: 211 return -EINVAL; 212 } 213 214 /* Ensure the resource is associated with some group */ 215 status = twlreg_grp(rdev); 216 if (status < 0) 217 return status; 218 if (!(status & (P3_GRP_4030 | P2_GRP_4030 | P1_GRP_4030))) 219 return -EACCES; 220 221 status = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, 222 message >> 8, 0x15 /* PB_WORD_MSB */ ); 223 if (status >= 0) 224 return status; 225 226 return twl_i2c_write_u8(TWL_MODULE_PM_MASTER, 227 message, 0x16 /* PB_WORD_LSB */ ); 228} 229 230/*----------------------------------------------------------------------*/ 231 232/* 233 * Support for adjustable-voltage LDOs uses a four bit (or less) voltage 234 * select field in its control register. We use tables indexed by VSEL 235 * to record voltages in milliVolts. (Accuracy is about three percent.) 236 * 237 * Note that VSEL values for VAUX2 changed in twl5030 and newer silicon; 238 * currently handled by listing two slightly different VAUX2 regulators, 239 * only one of which will be configured. 240 * 241 * VSEL values documented as "TI cannot support these values" are flagged 242 * in these tables as UNSUP() values; we normally won't assign them. 243 * 244 * VAUX3 at 3V is incorrectly listed in some TI manuals as unsupported. 245 * TI are revising the twl5030/tps659x0 specs to support that 3.0V setting. 246 */ 247#ifdef CONFIG_TWL4030_ALLOW_UNSUPPORTED 248#define UNSUP_MASK 0x0000 249#else 250#define UNSUP_MASK 0x8000 251#endif 252 253#define UNSUP(x) (UNSUP_MASK | (x)) 254#define IS_UNSUP(x) (UNSUP_MASK & (x)) 255#define LDO_MV(x) (~UNSUP_MASK & (x)) 256 257 258static const u16 VAUX1_VSEL_table[] = { 259 UNSUP(1500), UNSUP(1800), 2500, 2800, 260 3000, 3000, 3000, 3000, 261}; 262static const u16 VAUX2_4030_VSEL_table[] = { 263 UNSUP(1000), UNSUP(1000), UNSUP(1200), 1300, 264 1500, 1800, UNSUP(1850), 2500, 265 UNSUP(2600), 2800, UNSUP(2850), UNSUP(3000), 266 UNSUP(3150), UNSUP(3150), UNSUP(3150), UNSUP(3150), 267}; 268static const u16 VAUX2_VSEL_table[] = { 269 1700, 1700, 1900, 1300, 270 1500, 1800, 2000, 2500, 271 2100, 2800, 2200, 2300, 272 2400, 2400, 2400, 2400, 273}; 274static const u16 VAUX3_VSEL_table[] = { 275 1500, 1800, 2500, 2800, 276 3000, 3000, 3000, 3000, 277}; 278static const u16 VAUX4_VSEL_table[] = { 279 700, 1000, 1200, UNSUP(1300), 280 1500, 1800, UNSUP(1850), 2500, 281 UNSUP(2600), 2800, UNSUP(2850), UNSUP(3000), 282 UNSUP(3150), UNSUP(3150), UNSUP(3150), UNSUP(3150), 283}; 284static const u16 VMMC1_VSEL_table[] = { 285 1850, 2850, 3000, 3150, 286}; 287static const u16 VMMC2_VSEL_table[] = { 288 UNSUP(1000), UNSUP(1000), UNSUP(1200), UNSUP(1300), 289 UNSUP(1500), UNSUP(1800), 1850, UNSUP(2500), 290 2600, 2800, 2850, 3000, 291 3150, 3150, 3150, 3150, 292}; 293static const u16 VPLL1_VSEL_table[] = { 294 1000, 1200, 1300, 1800, 295 UNSUP(2800), UNSUP(3000), UNSUP(3000), UNSUP(3000), 296}; 297static const u16 VPLL2_VSEL_table[] = { 298 700, 1000, 1200, 1300, 299 UNSUP(1500), 1800, UNSUP(1850), UNSUP(2500), 300 UNSUP(2600), UNSUP(2800), UNSUP(2850), UNSUP(3000), 301 UNSUP(3150), UNSUP(3150), UNSUP(3150), UNSUP(3150), 302}; 303static const u16 VSIM_VSEL_table[] = { 304 UNSUP(1000), UNSUP(1200), UNSUP(1300), 1800, 305 2800, 3000, 3000, 3000, 306}; 307static const u16 VDAC_VSEL_table[] = { 308 1200, 1300, 1800, 1800, 309}; 310static const u16 VDD1_VSEL_table[] = { 311 800, 1450, 312}; 313static const u16 VDD2_VSEL_table[] = { 314 800, 1450, 1500, 315}; 316static const u16 VIO_VSEL_table[] = { 317 1800, 1850, 318}; 319static const u16 VINTANA2_VSEL_table[] = { 320 2500, 2750, 321}; 322 323static int twl4030ldo_list_voltage(struct regulator_dev *rdev, unsigned index) 324{ 325 struct twlreg_info *info = rdev_get_drvdata(rdev); 326 int mV = info->table[index]; 327 328 return IS_UNSUP(mV) ? 0 : (LDO_MV(mV) * 1000); 329} 330 331static int 332twl4030ldo_set_voltage(struct regulator_dev *rdev, int min_uV, int max_uV) 333{ 334 struct twlreg_info *info = rdev_get_drvdata(rdev); 335 int vsel; 336 337 for (vsel = 0; vsel < info->table_len; vsel++) { 338 int mV = info->table[vsel]; 339 int uV; 340 341 if (IS_UNSUP(mV)) 342 continue; 343 uV = LDO_MV(mV) * 1000; 344 345 /* REVISIT for VAUX2, first match may not be best/lowest */ 346 347 /* use the first in-range value */ 348 if (min_uV <= uV && uV <= max_uV) 349 return twlreg_write(info, TWL_MODULE_PM_RECEIVER, 350 VREG_VOLTAGE, vsel); 351 } 352 353 return -EDOM; 354} 355 356static int twl4030ldo_get_voltage(struct regulator_dev *rdev) 357{ 358 struct twlreg_info *info = rdev_get_drvdata(rdev); 359 int vsel = twlreg_read(info, TWL_MODULE_PM_RECEIVER, 360 VREG_VOLTAGE); 361 362 if (vsel < 0) 363 return vsel; 364 365 vsel &= info->table_len - 1; 366 return LDO_MV(info->table[vsel]) * 1000; 367} 368 369static struct regulator_ops twl4030ldo_ops = { 370 .list_voltage = twl4030ldo_list_voltage, 371 372 .set_voltage = twl4030ldo_set_voltage, 373 .get_voltage = twl4030ldo_get_voltage, 374 375 .enable = twlreg_enable, 376 .disable = twlreg_disable, 377 .is_enabled = twlreg_is_enabled, 378 379 .set_mode = twlreg_set_mode, 380 381 .get_status = twlreg_get_status, 382}; 383 384static int twl6030ldo_list_voltage(struct regulator_dev *rdev, unsigned index) 385{ 386 struct twlreg_info *info = rdev_get_drvdata(rdev); 387 388 return ((info->min_mV + (index * 100)) * 1000); 389} 390 391static int 392twl6030ldo_set_voltage(struct regulator_dev *rdev, int min_uV, int max_uV) 393{ 394 struct twlreg_info *info = rdev_get_drvdata(rdev); 395 int vsel; 396 397 if ((min_uV/1000 < info->min_mV) || (max_uV/1000 > info->max_mV)) 398 return -EDOM; 399 400 /* 401 * Use the below formula to calculate vsel 402 * mV = 1000mv + 100mv * (vsel - 1) 403 */ 404 vsel = (min_uV/1000 - 1000)/100 + 1; 405 return twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_VOLTAGE, vsel); 406 407} 408 409static int twl6030ldo_get_voltage(struct regulator_dev *rdev) 410{ 411 struct twlreg_info *info = rdev_get_drvdata(rdev); 412 int vsel = twlreg_read(info, TWL_MODULE_PM_RECEIVER, 413 VREG_VOLTAGE); 414 415 if (vsel < 0) 416 return vsel; 417 418 /* 419 * Use the below formula to calculate vsel 420 * mV = 1000mv + 100mv * (vsel - 1) 421 */ 422 return (1000 + (100 * (vsel - 1))) * 1000; 423} 424 425static struct regulator_ops twl6030ldo_ops = { 426 .list_voltage = twl6030ldo_list_voltage, 427 428 .set_voltage = twl6030ldo_set_voltage, 429 .get_voltage = twl6030ldo_get_voltage, 430 431 .enable = twlreg_enable, 432 .disable = twlreg_disable, 433 .is_enabled = twlreg_is_enabled, 434 435 .set_mode = twlreg_set_mode, 436 437 .get_status = twlreg_get_status, 438}; 439 440/*----------------------------------------------------------------------*/ 441 442/* 443 * Fixed voltage LDOs don't have a VSEL field to update. 444 */ 445static int twlfixed_list_voltage(struct regulator_dev *rdev, unsigned index) 446{ 447 struct twlreg_info *info = rdev_get_drvdata(rdev); 448 449 return info->min_mV * 1000; 450} 451 452static int twlfixed_get_voltage(struct regulator_dev *rdev) 453{ 454 struct twlreg_info *info = rdev_get_drvdata(rdev); 455 456 return info->min_mV * 1000; 457} 458 459static struct regulator_ops twlfixed_ops = { 460 .list_voltage = twlfixed_list_voltage, 461 462 .get_voltage = twlfixed_get_voltage, 463 464 .enable = twlreg_enable, 465 .disable = twlreg_disable, 466 .is_enabled = twlreg_is_enabled, 467 468 .set_mode = twlreg_set_mode, 469 470 .get_status = twlreg_get_status, 471}; 472 473/*----------------------------------------------------------------------*/ 474 475#define TWL4030_FIXED_LDO(label, offset, mVolts, num, turnon_delay, \ 476 remap_conf) \ 477 TWL_FIXED_LDO(label, offset, mVolts, num, turnon_delay, \ 478 remap_conf, TWL4030) 479#define TWL6030_FIXED_LDO(label, offset, mVolts, num, turnon_delay, \ 480 remap_conf) \ 481 TWL_FIXED_LDO(label, offset, mVolts, num, turnon_delay, \ 482 remap_conf, TWL6030) 483 484#define TWL4030_ADJUSTABLE_LDO(label, offset, num, turnon_delay, remap_conf) { \ 485 .base = offset, \ 486 .id = num, \ 487 .table_len = ARRAY_SIZE(label##_VSEL_table), \ 488 .table = label##_VSEL_table, \ 489 .delay = turnon_delay, \ 490 .remap = remap_conf, \ 491 .desc = { \ 492 .name = #label, \ 493 .id = TWL4030_REG_##label, \ 494 .n_voltages = ARRAY_SIZE(label##_VSEL_table), \ 495 .ops = &twl4030ldo_ops, \ 496 .type = REGULATOR_VOLTAGE, \ 497 .owner = THIS_MODULE, \ 498 }, \ 499 } 500 501#define TWL6030_ADJUSTABLE_LDO(label, offset, min_mVolts, max_mVolts, num, \ 502 remap_conf) { \ 503 .base = offset, \ 504 .id = num, \ 505 .min_mV = min_mVolts, \ 506 .max_mV = max_mVolts, \ 507 .remap = remap_conf, \ 508 .desc = { \ 509 .name = #label, \ 510 .id = TWL6030_REG_##label, \ 511 .n_voltages = (max_mVolts - min_mVolts)/100, \ 512 .ops = &twl6030ldo_ops, \ 513 .type = REGULATOR_VOLTAGE, \ 514 .owner = THIS_MODULE, \ 515 }, \ 516 } 517 518 519#define TWL_FIXED_LDO(label, offset, mVolts, num, turnon_delay, remap_conf, \ 520 family) { \ 521 .base = offset, \ 522 .id = num, \ 523 .min_mV = mVolts, \ 524 .delay = turnon_delay, \ 525 .remap = remap_conf, \ 526 .desc = { \ 527 .name = #label, \ 528 .id = family##_REG_##label, \ 529 .n_voltages = 1, \ 530 .ops = &twlfixed_ops, \ 531 .type = REGULATOR_VOLTAGE, \ 532 .owner = THIS_MODULE, \ 533 }, \ 534 } 535 536/* 537 * We list regulators here if systems need some level of 538 * software control over them after boot. 539 */ 540static struct twlreg_info twl_regs[] = { 541 TWL4030_ADJUSTABLE_LDO(VAUX1, 0x17, 1, 100, 0x08), 542 TWL4030_ADJUSTABLE_LDO(VAUX2_4030, 0x1b, 2, 100, 0x08), 543 TWL4030_ADJUSTABLE_LDO(VAUX2, 0x1b, 2, 100, 0x08), 544 TWL4030_ADJUSTABLE_LDO(VAUX3, 0x1f, 3, 100, 0x08), 545 TWL4030_ADJUSTABLE_LDO(VAUX4, 0x23, 4, 100, 0x08), 546 TWL4030_ADJUSTABLE_LDO(VMMC1, 0x27, 5, 100, 0x08), 547 TWL4030_ADJUSTABLE_LDO(VMMC2, 0x2b, 6, 100, 0x08), 548 TWL4030_ADJUSTABLE_LDO(VPLL1, 0x2f, 7, 100, 0x00), 549 TWL4030_ADJUSTABLE_LDO(VPLL2, 0x33, 8, 100, 0x08), 550 TWL4030_ADJUSTABLE_LDO(VSIM, 0x37, 9, 100, 0x00), 551 TWL4030_ADJUSTABLE_LDO(VDAC, 0x3b, 10, 100, 0x08), 552 TWL4030_FIXED_LDO(VINTANA1, 0x3f, 1500, 11, 100, 0x08), 553 TWL4030_ADJUSTABLE_LDO(VINTANA2, 0x43, 12, 100, 0x08), 554 TWL4030_FIXED_LDO(VINTDIG, 0x47, 1500, 13, 100, 0x08), 555 TWL4030_ADJUSTABLE_LDO(VIO, 0x4b, 14, 1000, 0x08), 556 TWL4030_ADJUSTABLE_LDO(VDD1, 0x55, 15, 1000, 0x08), 557 TWL4030_ADJUSTABLE_LDO(VDD2, 0x63, 16, 1000, 0x08), 558 TWL4030_FIXED_LDO(VUSB1V5, 0x71, 1500, 17, 100, 0x08), 559 TWL4030_FIXED_LDO(VUSB1V8, 0x74, 1800, 18, 100, 0x08), 560 TWL4030_FIXED_LDO(VUSB3V1, 0x77, 3100, 19, 150, 0x08), 561 /* VUSBCP is managed *only* by the USB subchip */ 562 563 /* 6030 REG with base as PMC Slave Misc : 0x0030 */ 564 /* Turnon-delay and remap configuration values for 6030 are not 565 verified since the specification is not public */ 566 TWL6030_ADJUSTABLE_LDO(VAUX1_6030, 0x54, 1000, 3300, 1, 0x21), 567 TWL6030_ADJUSTABLE_LDO(VAUX2_6030, 0x58, 1000, 3300, 2, 0x21), 568 TWL6030_ADJUSTABLE_LDO(VAUX3_6030, 0x5c, 1000, 3300, 3, 0x21), 569 TWL6030_ADJUSTABLE_LDO(VMMC, 0x68, 1000, 3300, 4, 0x21), 570 TWL6030_ADJUSTABLE_LDO(VPP, 0x6c, 1000, 3300, 5, 0x21), 571 TWL6030_ADJUSTABLE_LDO(VUSIM, 0x74, 1000, 3300, 7, 0x21), 572 TWL6030_FIXED_LDO(VANA, 0x50, 2100, 15, 0, 0x21), 573 TWL6030_FIXED_LDO(VCXIO, 0x60, 1800, 16, 0, 0x21), 574 TWL6030_FIXED_LDO(VDAC, 0x64, 1800, 17, 0, 0x21), 575 TWL6030_FIXED_LDO(VUSB, 0x70, 3300, 18, 0, 0x21) 576}; 577 578static int __devinit twlreg_probe(struct platform_device *pdev) 579{ 580 int i; 581 struct twlreg_info *info; 582 struct regulator_init_data *initdata; 583 struct regulation_constraints *c; 584 struct regulator_dev *rdev; 585 586 for (i = 0, info = NULL; i < ARRAY_SIZE(twl_regs); i++) { 587 if (twl_regs[i].desc.id != pdev->id) 588 continue; 589 info = twl_regs + i; 590 break; 591 } 592 if (!info) 593 return -ENODEV; 594 595 initdata = pdev->dev.platform_data; 596 if (!initdata) 597 return -EINVAL; 598 599 /* Constrain board-specific capabilities according to what 600 * this driver and the chip itself can actually do. 601 */ 602 c = &initdata->constraints; 603 c->valid_modes_mask &= REGULATOR_MODE_NORMAL | REGULATOR_MODE_STANDBY; 604 c->valid_ops_mask &= REGULATOR_CHANGE_VOLTAGE 605 | REGULATOR_CHANGE_MODE 606 | REGULATOR_CHANGE_STATUS; 607 switch (pdev->id) { 608 case TWL4030_REG_VIO: 609 case TWL4030_REG_VDD1: 610 case TWL4030_REG_VDD2: 611 case TWL4030_REG_VPLL1: 612 case TWL4030_REG_VINTANA1: 613 case TWL4030_REG_VINTANA2: 614 case TWL4030_REG_VINTDIG: 615 c->always_on = true; 616 break; 617 default: 618 break; 619 } 620 621 rdev = regulator_register(&info->desc, &pdev->dev, initdata, info); 622 if (IS_ERR(rdev)) { 623 dev_err(&pdev->dev, "can't register %s, %ld\n", 624 info->desc.name, PTR_ERR(rdev)); 625 return PTR_ERR(rdev); 626 } 627 platform_set_drvdata(pdev, rdev); 628 629 twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_REMAP, 630 info->remap); 631 632 /* NOTE: many regulators support short-circuit IRQs (presentable 633 * as REGULATOR_OVER_CURRENT notifications?) configured via: 634 * - SC_CONFIG 635 * - SC_DETECT1 (vintana2, vmmc1/2, vaux1/2/3/4) 636 * - SC_DETECT2 (vusb, vdac, vio, vdd1/2, vpll2) 637 * - IT_CONFIG 638 */ 639 640 return 0; 641} 642 643static int __devexit twlreg_remove(struct platform_device *pdev) 644{ 645 regulator_unregister(platform_get_drvdata(pdev)); 646 return 0; 647} 648 649MODULE_ALIAS("platform:twl_reg"); 650 651static struct platform_driver twlreg_driver = { 652 .probe = twlreg_probe, 653 .remove = __devexit_p(twlreg_remove), 654 .driver.name = "twl_reg", 655 .driver.owner = THIS_MODULE, 656}; 657 658static int __init twlreg_init(void) 659{ 660 return platform_driver_register(&twlreg_driver); 661} 662subsys_initcall(twlreg_init); 663 664static void __exit twlreg_exit(void) 665{ 666 platform_driver_unregister(&twlreg_driver); 667} 668module_exit(twlreg_exit) 669 670MODULE_DESCRIPTION("TWL regulator driver"); 671MODULE_LICENSE("GPL"); 672