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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 | /* * twl-regulator.c -- support regulators in twl4030/twl6030 family chips * * Copyright (C) 2008 David Brownell * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. */ #include <linux/module.h> #include <linux/init.h> #include <linux/err.h> #include <linux/delay.h> #include <linux/platform_device.h> #include <linux/regulator/driver.h> #include <linux/regulator/machine.h> #include <linux/i2c/twl.h> /* * The TWL4030/TW5030/TPS659x0/TWL6030 family chips include power management, a * USB OTG transceiver, an RTC, ADC, PWM, and lots more. Some versions * include an audio codec, battery charger, and more voltage regulators. * These chips are often used in OMAP-based systems. * * This driver implements software-based resource control for various * voltage regulators. This is usually augmented with state machine * based control. */ struct twlreg_info { /* start of regulator's PM_RECEIVER control register bank */ u8 base; /* twl resource ID, for resource control state machine */ u8 id; /* voltage in mV = table[VSEL]; table_len must be a power-of-two */ u8 table_len; const u16 *table; /* regulator specific turn-on delay */ u16 delay; /* State REMAP default configuration */ u8 remap; /* chip constraints on regulator behavior */ u16 min_mV; u16 max_mV; /* used by regulator core */ struct regulator_desc desc; }; /* LDO control registers ... offset is from the base of its register bank. * The first three registers of all power resource banks help hardware to * manage the various resource groups. */ /* Common offset in TWL4030/6030 */ #define VREG_GRP 0 /* TWL4030 register offsets */ #define VREG_TYPE 1 #define VREG_REMAP 2 #define VREG_DEDICATED 3 /* LDO control */ /* TWL6030 register offsets */ #define VREG_TRANS 1 #define VREG_STATE 2 #define VREG_VOLTAGE 3 /* TWL6030 Misc register offsets */ #define VREG_BC_ALL 1 #define VREG_BC_REF 2 #define VREG_BC_PROC 3 #define VREG_BC_CLK_RST 4 static inline int twlreg_read(struct twlreg_info *info, unsigned slave_subgp, unsigned offset) { u8 value; int status; status = twl_i2c_read_u8(slave_subgp, &value, info->base + offset); return (status < 0) ? status : value; } static inline int twlreg_write(struct twlreg_info *info, unsigned slave_subgp, unsigned offset, u8 value) { return twl_i2c_write_u8(slave_subgp, value, info->base + offset); } /*----------------------------------------------------------------------*/ /* generic power resource operations, which work on all regulators */ static int twlreg_grp(struct regulator_dev *rdev) { return twlreg_read(rdev_get_drvdata(rdev), TWL_MODULE_PM_RECEIVER, VREG_GRP); } /* * Enable/disable regulators by joining/leaving the P1 (processor) group. * We assume nobody else is updating the DEV_GRP registers. */ /* definition for 4030 family */ #define P3_GRP_4030 BIT(7) /* "peripherals" */ #define P2_GRP_4030 BIT(6) /* secondary processor, modem, etc */ #define P1_GRP_4030 BIT(5) /* CPU/Linux */ /* definition for 6030 family */ #define P3_GRP_6030 BIT(2) /* secondary processor, modem, etc */ #define P2_GRP_6030 BIT(1) /* "peripherals" */ #define P1_GRP_6030 BIT(0) /* CPU/Linux */ static int twlreg_is_enabled(struct regulator_dev *rdev) { int state = twlreg_grp(rdev); if (state < 0) return state; if (twl_class_is_4030()) state &= P1_GRP_4030; else state &= P1_GRP_6030; return state; } static int twlreg_enable(struct regulator_dev *rdev) { struct twlreg_info *info = rdev_get_drvdata(rdev); int grp; int ret; grp = twlreg_read(info, TWL_MODULE_PM_RECEIVER, VREG_GRP); if (grp < 0) return grp; if (twl_class_is_4030()) grp |= P1_GRP_4030; else grp |= P1_GRP_6030; ret = twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_GRP, grp); udelay(info->delay); return ret; } static int twlreg_disable(struct regulator_dev *rdev) { struct twlreg_info *info = rdev_get_drvdata(rdev); int grp; grp = twlreg_read(info, TWL_MODULE_PM_RECEIVER, VREG_GRP); if (grp < 0) return grp; if (twl_class_is_4030()) grp &= ~(P1_GRP_4030 | P2_GRP_4030 | P3_GRP_4030); else grp &= ~(P1_GRP_6030 | P2_GRP_6030 | P3_GRP_6030); return twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_GRP, grp); } static int twlreg_get_status(struct regulator_dev *rdev) { int state = twlreg_grp(rdev); if (twl_class_is_6030()) return 0; /* FIXME return for 6030 regulator */ if (state < 0) return state; state &= 0x0f; /* assume state != WARM_RESET; we'd not be running... */ if (!state) return REGULATOR_STATUS_OFF; return (state & BIT(3)) ? REGULATOR_STATUS_NORMAL : REGULATOR_STATUS_STANDBY; } static int twlreg_set_mode(struct regulator_dev *rdev, unsigned mode) { struct twlreg_info *info = rdev_get_drvdata(rdev); unsigned message; int status; if (twl_class_is_6030()) return 0; /* FIXME return for 6030 regulator */ /* We can only set the mode through state machine commands... */ switch (mode) { case REGULATOR_MODE_NORMAL: message = MSG_SINGULAR(DEV_GRP_P1, info->id, RES_STATE_ACTIVE); break; case REGULATOR_MODE_STANDBY: message = MSG_SINGULAR(DEV_GRP_P1, info->id, RES_STATE_SLEEP); break; default: return -EINVAL; } /* Ensure the resource is associated with some group */ status = twlreg_grp(rdev); if (status < 0) return status; if (!(status & (P3_GRP_4030 | P2_GRP_4030 | P1_GRP_4030))) return -EACCES; status = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, message >> 8, 0x15 /* PB_WORD_MSB */ ); if (status >= 0) return status; return twl_i2c_write_u8(TWL_MODULE_PM_MASTER, message, 0x16 /* PB_WORD_LSB */ ); } /*----------------------------------------------------------------------*/ /* * Support for adjustable-voltage LDOs uses a four bit (or less) voltage * select field in its control register. We use tables indexed by VSEL * to record voltages in milliVolts. (Accuracy is about three percent.) * * Note that VSEL values for VAUX2 changed in twl5030 and newer silicon; * currently handled by listing two slightly different VAUX2 regulators, * only one of which will be configured. * * VSEL values documented as "TI cannot support these values" are flagged * in these tables as UNSUP() values; we normally won't assign them. * * VAUX3 at 3V is incorrectly listed in some TI manuals as unsupported. * TI are revising the twl5030/tps659x0 specs to support that 3.0V setting. */ #ifdef CONFIG_TWL4030_ALLOW_UNSUPPORTED #define UNSUP_MASK 0x0000 #else #define UNSUP_MASK 0x8000 #endif #define UNSUP(x) (UNSUP_MASK | (x)) #define IS_UNSUP(x) (UNSUP_MASK & (x)) #define LDO_MV(x) (~UNSUP_MASK & (x)) static const u16 VAUX1_VSEL_table[] = { UNSUP(1500), UNSUP(1800), 2500, 2800, 3000, 3000, 3000, 3000, }; static const u16 VAUX2_4030_VSEL_table[] = { UNSUP(1000), UNSUP(1000), UNSUP(1200), 1300, 1500, 1800, UNSUP(1850), 2500, UNSUP(2600), 2800, UNSUP(2850), UNSUP(3000), UNSUP(3150), UNSUP(3150), UNSUP(3150), UNSUP(3150), }; static const u16 VAUX2_VSEL_table[] = { 1700, 1700, 1900, 1300, 1500, 1800, 2000, 2500, 2100, 2800, 2200, 2300, 2400, 2400, 2400, 2400, }; static const u16 VAUX3_VSEL_table[] = { 1500, 1800, 2500, 2800, 3000, 3000, 3000, 3000, }; static const u16 VAUX4_VSEL_table[] = { 700, 1000, 1200, UNSUP(1300), 1500, 1800, UNSUP(1850), 2500, UNSUP(2600), 2800, UNSUP(2850), UNSUP(3000), UNSUP(3150), UNSUP(3150), UNSUP(3150), UNSUP(3150), }; static const u16 VMMC1_VSEL_table[] = { 1850, 2850, 3000, 3150, }; static const u16 VMMC2_VSEL_table[] = { UNSUP(1000), UNSUP(1000), UNSUP(1200), UNSUP(1300), UNSUP(1500), UNSUP(1800), 1850, UNSUP(2500), 2600, 2800, 2850, 3000, 3150, 3150, 3150, 3150, }; static const u16 VPLL1_VSEL_table[] = { 1000, 1200, 1300, 1800, UNSUP(2800), UNSUP(3000), UNSUP(3000), UNSUP(3000), }; static const u16 VPLL2_VSEL_table[] = { 700, 1000, 1200, 1300, UNSUP(1500), 1800, UNSUP(1850), UNSUP(2500), UNSUP(2600), UNSUP(2800), UNSUP(2850), UNSUP(3000), UNSUP(3150), UNSUP(3150), UNSUP(3150), UNSUP(3150), }; static const u16 VSIM_VSEL_table[] = { UNSUP(1000), UNSUP(1200), UNSUP(1300), 1800, 2800, 3000, 3000, 3000, }; static const u16 VDAC_VSEL_table[] = { 1200, 1300, 1800, 1800, }; static const u16 VDD1_VSEL_table[] = { 800, 1450, }; static const u16 VDD2_VSEL_table[] = { 800, 1450, 1500, }; static const u16 VIO_VSEL_table[] = { 1800, 1850, }; static const u16 VINTANA2_VSEL_table[] = { 2500, 2750, }; static int twl4030ldo_list_voltage(struct regulator_dev *rdev, unsigned index) { struct twlreg_info *info = rdev_get_drvdata(rdev); int mV = info->table[index]; return IS_UNSUP(mV) ? 0 : (LDO_MV(mV) * 1000); } static int twl4030ldo_set_voltage(struct regulator_dev *rdev, int min_uV, int max_uV) { struct twlreg_info *info = rdev_get_drvdata(rdev); int vsel; for (vsel = 0; vsel < info->table_len; vsel++) { int mV = info->table[vsel]; int uV; if (IS_UNSUP(mV)) continue; uV = LDO_MV(mV) * 1000; /* REVISIT for VAUX2, first match may not be best/lowest */ /* use the first in-range value */ if (min_uV <= uV && uV <= max_uV) return twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_VOLTAGE, vsel); } return -EDOM; } static int twl4030ldo_get_voltage(struct regulator_dev *rdev) { struct twlreg_info *info = rdev_get_drvdata(rdev); int vsel = twlreg_read(info, TWL_MODULE_PM_RECEIVER, VREG_VOLTAGE); if (vsel < 0) return vsel; vsel &= info->table_len - 1; return LDO_MV(info->table[vsel]) * 1000; } static struct regulator_ops twl4030ldo_ops = { .list_voltage = twl4030ldo_list_voltage, .set_voltage = twl4030ldo_set_voltage, .get_voltage = twl4030ldo_get_voltage, .enable = twlreg_enable, .disable = twlreg_disable, .is_enabled = twlreg_is_enabled, .set_mode = twlreg_set_mode, .get_status = twlreg_get_status, }; static int twl6030ldo_list_voltage(struct regulator_dev *rdev, unsigned index) { struct twlreg_info *info = rdev_get_drvdata(rdev); return ((info->min_mV + (index * 100)) * 1000); } static int twl6030ldo_set_voltage(struct regulator_dev *rdev, int min_uV, int max_uV) { struct twlreg_info *info = rdev_get_drvdata(rdev); int vsel; if ((min_uV/1000 < info->min_mV) || (max_uV/1000 > info->max_mV)) return -EDOM; /* * Use the below formula to calculate vsel * mV = 1000mv + 100mv * (vsel - 1) */ vsel = (min_uV/1000 - 1000)/100 + 1; return twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_VOLTAGE, vsel); } static int twl6030ldo_get_voltage(struct regulator_dev *rdev) { struct twlreg_info *info = rdev_get_drvdata(rdev); int vsel = twlreg_read(info, TWL_MODULE_PM_RECEIVER, VREG_VOLTAGE); if (vsel < 0) return vsel; /* * Use the below formula to calculate vsel * mV = 1000mv + 100mv * (vsel - 1) */ return (1000 + (100 * (vsel - 1))) * 1000; } static struct regulator_ops twl6030ldo_ops = { .list_voltage = twl6030ldo_list_voltage, .set_voltage = twl6030ldo_set_voltage, .get_voltage = twl6030ldo_get_voltage, .enable = twlreg_enable, .disable = twlreg_disable, .is_enabled = twlreg_is_enabled, .set_mode = twlreg_set_mode, .get_status = twlreg_get_status, }; /*----------------------------------------------------------------------*/ /* * Fixed voltage LDOs don't have a VSEL field to update. */ static int twlfixed_list_voltage(struct regulator_dev *rdev, unsigned index) { struct twlreg_info *info = rdev_get_drvdata(rdev); return info->min_mV * 1000; } static int twlfixed_get_voltage(struct regulator_dev *rdev) { struct twlreg_info *info = rdev_get_drvdata(rdev); return info->min_mV * 1000; } static struct regulator_ops twlfixed_ops = { .list_voltage = twlfixed_list_voltage, .get_voltage = twlfixed_get_voltage, .enable = twlreg_enable, .disable = twlreg_disable, .is_enabled = twlreg_is_enabled, .set_mode = twlreg_set_mode, .get_status = twlreg_get_status, }; /*----------------------------------------------------------------------*/ #define TWL4030_FIXED_LDO(label, offset, mVolts, num, turnon_delay, \ remap_conf) \ TWL_FIXED_LDO(label, offset, mVolts, num, turnon_delay, \ remap_conf, TWL4030) #define TWL6030_FIXED_LDO(label, offset, mVolts, num, turnon_delay, \ remap_conf) \ TWL_FIXED_LDO(label, offset, mVolts, num, turnon_delay, \ remap_conf, TWL6030) #define TWL4030_ADJUSTABLE_LDO(label, offset, num, turnon_delay, remap_conf) { \ .base = offset, \ .id = num, \ .table_len = ARRAY_SIZE(label##_VSEL_table), \ .table = label##_VSEL_table, \ .delay = turnon_delay, \ .remap = remap_conf, \ .desc = { \ .name = #label, \ .id = TWL4030_REG_##label, \ .n_voltages = ARRAY_SIZE(label##_VSEL_table), \ .ops = &twl4030ldo_ops, \ .type = REGULATOR_VOLTAGE, \ .owner = THIS_MODULE, \ }, \ } #define TWL6030_ADJUSTABLE_LDO(label, offset, min_mVolts, max_mVolts, num, \ remap_conf) { \ .base = offset, \ .id = num, \ .min_mV = min_mVolts, \ .max_mV = max_mVolts, \ .remap = remap_conf, \ .desc = { \ .name = #label, \ .id = TWL6030_REG_##label, \ .n_voltages = (max_mVolts - min_mVolts)/100, \ .ops = &twl6030ldo_ops, \ .type = REGULATOR_VOLTAGE, \ .owner = THIS_MODULE, \ }, \ } #define TWL_FIXED_LDO(label, offset, mVolts, num, turnon_delay, remap_conf, \ family) { \ .base = offset, \ .id = num, \ .min_mV = mVolts, \ .delay = turnon_delay, \ .remap = remap_conf, \ .desc = { \ .name = #label, \ .id = family##_REG_##label, \ .n_voltages = 1, \ .ops = &twlfixed_ops, \ .type = REGULATOR_VOLTAGE, \ .owner = THIS_MODULE, \ }, \ } /* * We list regulators here if systems need some level of * software control over them after boot. */ static struct twlreg_info twl_regs[] = { TWL4030_ADJUSTABLE_LDO(VAUX1, 0x17, 1, 100, 0x08), TWL4030_ADJUSTABLE_LDO(VAUX2_4030, 0x1b, 2, 100, 0x08), TWL4030_ADJUSTABLE_LDO(VAUX2, 0x1b, 2, 100, 0x08), TWL4030_ADJUSTABLE_LDO(VAUX3, 0x1f, 3, 100, 0x08), TWL4030_ADJUSTABLE_LDO(VAUX4, 0x23, 4, 100, 0x08), TWL4030_ADJUSTABLE_LDO(VMMC1, 0x27, 5, 100, 0x08), TWL4030_ADJUSTABLE_LDO(VMMC2, 0x2b, 6, 100, 0x08), TWL4030_ADJUSTABLE_LDO(VPLL1, 0x2f, 7, 100, 0x00), TWL4030_ADJUSTABLE_LDO(VPLL2, 0x33, 8, 100, 0x08), TWL4030_ADJUSTABLE_LDO(VSIM, 0x37, 9, 100, 0x00), TWL4030_ADJUSTABLE_LDO(VDAC, 0x3b, 10, 100, 0x08), TWL4030_FIXED_LDO(VINTANA1, 0x3f, 1500, 11, 100, 0x08), TWL4030_ADJUSTABLE_LDO(VINTANA2, 0x43, 12, 100, 0x08), TWL4030_FIXED_LDO(VINTDIG, 0x47, 1500, 13, 100, 0x08), TWL4030_ADJUSTABLE_LDO(VIO, 0x4b, 14, 1000, 0x08), TWL4030_ADJUSTABLE_LDO(VDD1, 0x55, 15, 1000, 0x08), TWL4030_ADJUSTABLE_LDO(VDD2, 0x63, 16, 1000, 0x08), TWL4030_FIXED_LDO(VUSB1V5, 0x71, 1500, 17, 100, 0x08), TWL4030_FIXED_LDO(VUSB1V8, 0x74, 1800, 18, 100, 0x08), TWL4030_FIXED_LDO(VUSB3V1, 0x77, 3100, 19, 150, 0x08), /* VUSBCP is managed *only* by the USB subchip */ /* 6030 REG with base as PMC Slave Misc : 0x0030 */ /* Turnon-delay and remap configuration values for 6030 are not verified since the specification is not public */ TWL6030_ADJUSTABLE_LDO(VAUX1_6030, 0x54, 1000, 3300, 1, 0x21), TWL6030_ADJUSTABLE_LDO(VAUX2_6030, 0x58, 1000, 3300, 2, 0x21), TWL6030_ADJUSTABLE_LDO(VAUX3_6030, 0x5c, 1000, 3300, 3, 0x21), TWL6030_ADJUSTABLE_LDO(VMMC, 0x68, 1000, 3300, 4, 0x21), TWL6030_ADJUSTABLE_LDO(VPP, 0x6c, 1000, 3300, 5, 0x21), TWL6030_ADJUSTABLE_LDO(VUSIM, 0x74, 1000, 3300, 7, 0x21), TWL6030_FIXED_LDO(VANA, 0x50, 2100, 15, 0, 0x21), TWL6030_FIXED_LDO(VCXIO, 0x60, 1800, 16, 0, 0x21), TWL6030_FIXED_LDO(VDAC, 0x64, 1800, 17, 0, 0x21), TWL6030_FIXED_LDO(VUSB, 0x70, 3300, 18, 0, 0x21) }; static int __devinit twlreg_probe(struct platform_device *pdev) { int i; struct twlreg_info *info; struct regulator_init_data *initdata; struct regulation_constraints *c; struct regulator_dev *rdev; for (i = 0, info = NULL; i < ARRAY_SIZE(twl_regs); i++) { if (twl_regs[i].desc.id != pdev->id) continue; info = twl_regs + i; break; } if (!info) return -ENODEV; initdata = pdev->dev.platform_data; if (!initdata) return -EINVAL; /* Constrain board-specific capabilities according to what * this driver and the chip itself can actually do. */ c = &initdata->constraints; c->valid_modes_mask &= REGULATOR_MODE_NORMAL | REGULATOR_MODE_STANDBY; c->valid_ops_mask &= REGULATOR_CHANGE_VOLTAGE | REGULATOR_CHANGE_MODE | REGULATOR_CHANGE_STATUS; switch (pdev->id) { case TWL4030_REG_VIO: case TWL4030_REG_VDD1: case TWL4030_REG_VDD2: case TWL4030_REG_VPLL1: case TWL4030_REG_VINTANA1: case TWL4030_REG_VINTANA2: case TWL4030_REG_VINTDIG: c->always_on = true; break; default: break; } rdev = regulator_register(&info->desc, &pdev->dev, initdata, info); if (IS_ERR(rdev)) { dev_err(&pdev->dev, "can't register %s, %ld\n", info->desc.name, PTR_ERR(rdev)); return PTR_ERR(rdev); } platform_set_drvdata(pdev, rdev); twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_REMAP, info->remap); /* NOTE: many regulators support short-circuit IRQs (presentable * as REGULATOR_OVER_CURRENT notifications?) configured via: * - SC_CONFIG * - SC_DETECT1 (vintana2, vmmc1/2, vaux1/2/3/4) * - SC_DETECT2 (vusb, vdac, vio, vdd1/2, vpll2) * - IT_CONFIG */ return 0; } static int __devexit twlreg_remove(struct platform_device *pdev) { regulator_unregister(platform_get_drvdata(pdev)); return 0; } MODULE_ALIAS("platform:twl_reg"); static struct platform_driver twlreg_driver = { .probe = twlreg_probe, .remove = __devexit_p(twlreg_remove), /* NOTE: short name, to work around driver model truncation of * "twl_regulator.12" (and friends) to "twl_regulator.1". */ .driver.name = "twl_reg", .driver.owner = THIS_MODULE, }; static int __init twlreg_init(void) { return platform_driver_register(&twlreg_driver); } subsys_initcall(twlreg_init); static void __exit twlreg_exit(void) { platform_driver_unregister(&twlreg_driver); } module_exit(twlreg_exit) MODULE_DESCRIPTION("TWL regulator driver"); MODULE_LICENSE("GPL"); |