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 33 struct 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 79 static inline int 80 twlreg_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 90 static inline int 91 twlreg_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 */ 101 102 static 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 */ 120 121 static 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 } 134 135 static 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 } 156 157 static 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 } 173 174 static 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; /* FIXME return for 6030 regulator */ 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 } 192 193 static 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; /* FIXME return for 6030 regulator */ 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, TWL4030_PM_MASTER_PB_WORD_MSB); 223 if (status < 0) 224 return status; 225 226 return twl_i2c_write_u8(TWL_MODULE_PM_MASTER, 227 message & 0xff, TWL4030_PM_MASTER_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)) 256 257 258 static const u16 VAUX1_VSEL_table[] = { 259 UNSUP(1500), UNSUP(1800), 2500, 2800, 260 3000, 3000, 3000, 3000, 261 }; 262 static 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 }; 268 static 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 }; 274 static const u16 VAUX3_VSEL_table[] = { 275 1500, 1800, 2500, 2800, 276 3000, 3000, 3000, 3000, 277 }; 278 static 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 }; 284 static const u16 VMMC1_VSEL_table[] = { 285 1850, 2850, 3000, 3150, 286 }; 287 static 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 }; 293 static const u16 VPLL1_VSEL_table[] = { 294 1000, 1200, 1300, 1800, 295 UNSUP(2800), UNSUP(3000), UNSUP(3000), UNSUP(3000), 296 }; 297 static 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 }; 303 static const u16 VSIM_VSEL_table[] = { 304 UNSUP(1000), UNSUP(1200), UNSUP(1300), 1800, 305 2800, 3000, 3000, 3000, 306 }; 307 static const u16 VDAC_VSEL_table[] = { 308 1200, 1300, 1800, 1800, 309 }; 310 static const u16 VDD1_VSEL_table[] = { 311 800, 1450, 312 }; 313 static const u16 VDD2_VSEL_table[] = { 314 800, 1450, 1500, 315 }; 316 static const u16 VIO_VSEL_table[] = { 317 1800, 1850, 318 }; 319 static const u16 VINTANA2_VSEL_table[] = { 320 2500, 2750, 321 }; 322 323 static 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 } 330 331 static int 332 twl4030ldo_set_voltage(struct regulator_dev *rdev, int min_uV, int max_uV, 333 unsigned *selector) 334 { 335 struct twlreg_info *info = rdev_get_drvdata(rdev); 336 int vsel; 337 338 for (vsel = 0; vsel < info->table_len; vsel++) { 339 int mV = info->table[vsel]; 340 int uV; 341 342 if (IS_UNSUP(mV)) 343 continue; 344 uV = LDO_MV(mV) * 1000; 345 346 /* REVISIT for VAUX2, first match may not be best/lowest */ 347 348 /* use the first in-range value */ 349 if (min_uV <= uV && uV <= max_uV) { 350 *selector = vsel; 351 return twlreg_write(info, TWL_MODULE_PM_RECEIVER, 352 VREG_VOLTAGE, vsel); 353 } 354 } 355 356 return -EDOM; 357 } 358 359 static int twl4030ldo_get_voltage(struct regulator_dev *rdev) 360 { 361 struct twlreg_info *info = rdev_get_drvdata(rdev); 362 int vsel = twlreg_read(info, TWL_MODULE_PM_RECEIVER, 363 VREG_VOLTAGE); 364 365 if (vsel < 0) 366 return vsel; 367 368 vsel &= info->table_len - 1; 369 return LDO_MV(info->table[vsel]) * 1000; 370 } 371 372 static struct regulator_ops twl4030ldo_ops = { 373 .list_voltage = twl4030ldo_list_voltage, 374 375 .set_voltage = twl4030ldo_set_voltage, 376 .get_voltage = twl4030ldo_get_voltage, 377 378 .enable = twlreg_enable, 379 .disable = twlreg_disable, 380 .is_enabled = twlreg_is_enabled, 381 382 .set_mode = twlreg_set_mode, 383 384 .get_status = twlreg_get_status, 385 }; 386 387 static int twl6030ldo_list_voltage(struct regulator_dev *rdev, unsigned index) 388 { 389 struct twlreg_info *info = rdev_get_drvdata(rdev); 390 391 return ((info->min_mV + (index * 100)) * 1000); 392 } 393 394 static int 395 twl6030ldo_set_voltage(struct regulator_dev *rdev, int min_uV, int max_uV, 396 unsigned *selector) 397 { 398 struct twlreg_info *info = rdev_get_drvdata(rdev); 399 int vsel; 400 401 if ((min_uV/1000 < info->min_mV) || (max_uV/1000 > info->max_mV)) 402 return -EDOM; 403 404 /* 405 * Use the below formula to calculate vsel 406 * mV = 1000mv + 100mv * (vsel - 1) 407 */ 408 vsel = (min_uV/1000 - 1000)/100 + 1; 409 *selector = vsel; 410 return twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_VOLTAGE, vsel); 411 412 } 413 414 static int twl6030ldo_get_voltage(struct regulator_dev *rdev) 415 { 416 struct twlreg_info *info = rdev_get_drvdata(rdev); 417 int vsel = twlreg_read(info, TWL_MODULE_PM_RECEIVER, 418 VREG_VOLTAGE); 419 420 if (vsel < 0) 421 return vsel; 422 423 /* 424 * Use the below formula to calculate vsel 425 * mV = 1000mv + 100mv * (vsel - 1) 426 */ 427 return (1000 + (100 * (vsel - 1))) * 1000; 428 } 429 430 static struct regulator_ops twl6030ldo_ops = { 431 .list_voltage = twl6030ldo_list_voltage, 432 433 .set_voltage = twl6030ldo_set_voltage, 434 .get_voltage = twl6030ldo_get_voltage, 435 436 .enable = twlreg_enable, 437 .disable = twlreg_disable, 438 .is_enabled = twlreg_is_enabled, 439 440 .set_mode = twlreg_set_mode, 441 442 .get_status = twlreg_get_status, 443 }; 444 445 /*----------------------------------------------------------------------*/ 446 447 /* 448 * Fixed voltage LDOs don't have a VSEL field to update. 449 */ 450 static int twlfixed_list_voltage(struct regulator_dev *rdev, unsigned index) 451 { 452 struct twlreg_info *info = rdev_get_drvdata(rdev); 453 454 return info->min_mV * 1000; 455 } 456 457 static int twlfixed_get_voltage(struct regulator_dev *rdev) 458 { 459 struct twlreg_info *info = rdev_get_drvdata(rdev); 460 461 return info->min_mV * 1000; 462 } 463 464 static struct regulator_ops twlfixed_ops = { 465 .list_voltage = twlfixed_list_voltage, 466 467 .get_voltage = twlfixed_get_voltage, 468 469 .enable = twlreg_enable, 470 .disable = twlreg_disable, 471 .is_enabled = twlreg_is_enabled, 472 473 .set_mode = twlreg_set_mode, 474 475 .get_status = twlreg_get_status, 476 }; 477 478 /*----------------------------------------------------------------------*/ 479 480 #define TWL4030_FIXED_LDO(label, offset, mVolts, num, turnon_delay, \ 481 remap_conf) \ 482 TWL_FIXED_LDO(label, offset, mVolts, num, turnon_delay, \ 483 remap_conf, TWL4030) 484 #define TWL6030_FIXED_LDO(label, offset, mVolts, num, turnon_delay, \ 485 remap_conf) \ 486 TWL_FIXED_LDO(label, offset, mVolts, num, turnon_delay, \ 487 remap_conf, TWL6030) 488 489 #define TWL4030_ADJUSTABLE_LDO(label, offset, num, turnon_delay, remap_conf) { \ 490 .base = offset, \ 491 .id = num, \ 492 .table_len = ARRAY_SIZE(label##_VSEL_table), \ 493 .table = label##_VSEL_table, \ 494 .delay = turnon_delay, \ 495 .remap = remap_conf, \ 496 .desc = { \ 497 .name = #label, \ 498 .id = TWL4030_REG_##label, \ 499 .n_voltages = ARRAY_SIZE(label##_VSEL_table), \ 500 .ops = &twl4030ldo_ops, \ 501 .type = REGULATOR_VOLTAGE, \ 502 .owner = THIS_MODULE, \ 503 }, \ 504 } 505 506 #define TWL6030_ADJUSTABLE_LDO(label, offset, min_mVolts, max_mVolts, num, \ 507 remap_conf) { \ 508 .base = offset, \ 509 .id = num, \ 510 .min_mV = min_mVolts, \ 511 .max_mV = max_mVolts, \ 512 .remap = remap_conf, \ 513 .desc = { \ 514 .name = #label, \ 515 .id = TWL6030_REG_##label, \ 516 .n_voltages = (max_mVolts - min_mVolts)/100, \ 517 .ops = &twl6030ldo_ops, \ 518 .type = REGULATOR_VOLTAGE, \ 519 .owner = THIS_MODULE, \ 520 }, \ 521 } 522 523 524 #define TWL_FIXED_LDO(label, offset, mVolts, num, turnon_delay, remap_conf, \ 525 family) { \ 526 .base = offset, \ 527 .id = num, \ 528 .min_mV = mVolts, \ 529 .delay = turnon_delay, \ 530 .remap = remap_conf, \ 531 .desc = { \ 532 .name = #label, \ 533 .id = family##_REG_##label, \ 534 .n_voltages = 1, \ 535 .ops = &twlfixed_ops, \ 536 .type = REGULATOR_VOLTAGE, \ 537 .owner = THIS_MODULE, \ 538 }, \ 539 } 540 541 /* 542 * We list regulators here if systems need some level of 543 * software control over them after boot. 544 */ 545 static struct twlreg_info twl_regs[] = { 546 TWL4030_ADJUSTABLE_LDO(VAUX1, 0x17, 1, 100, 0x08), 547 TWL4030_ADJUSTABLE_LDO(VAUX2_4030, 0x1b, 2, 100, 0x08), 548 TWL4030_ADJUSTABLE_LDO(VAUX2, 0x1b, 2, 100, 0x08), 549 TWL4030_ADJUSTABLE_LDO(VAUX3, 0x1f, 3, 100, 0x08), 550 TWL4030_ADJUSTABLE_LDO(VAUX4, 0x23, 4, 100, 0x08), 551 TWL4030_ADJUSTABLE_LDO(VMMC1, 0x27, 5, 100, 0x08), 552 TWL4030_ADJUSTABLE_LDO(VMMC2, 0x2b, 6, 100, 0x08), 553 TWL4030_ADJUSTABLE_LDO(VPLL1, 0x2f, 7, 100, 0x00), 554 TWL4030_ADJUSTABLE_LDO(VPLL2, 0x33, 8, 100, 0x08), 555 TWL4030_ADJUSTABLE_LDO(VSIM, 0x37, 9, 100, 0x00), 556 TWL4030_ADJUSTABLE_LDO(VDAC, 0x3b, 10, 100, 0x08), 557 TWL4030_FIXED_LDO(VINTANA1, 0x3f, 1500, 11, 100, 0x08), 558 TWL4030_ADJUSTABLE_LDO(VINTANA2, 0x43, 12, 100, 0x08), 559 TWL4030_FIXED_LDO(VINTDIG, 0x47, 1500, 13, 100, 0x08), 560 TWL4030_ADJUSTABLE_LDO(VIO, 0x4b, 14, 1000, 0x08), 561 TWL4030_ADJUSTABLE_LDO(VDD1, 0x55, 15, 1000, 0x08), 562 TWL4030_ADJUSTABLE_LDO(VDD2, 0x63, 16, 1000, 0x08), 563 TWL4030_FIXED_LDO(VUSB1V5, 0x71, 1500, 17, 100, 0x08), 564 TWL4030_FIXED_LDO(VUSB1V8, 0x74, 1800, 18, 100, 0x08), 565 TWL4030_FIXED_LDO(VUSB3V1, 0x77, 3100, 19, 150, 0x08), 566 /* VUSBCP is managed *only* by the USB subchip */ 567 568 /* 6030 REG with base as PMC Slave Misc : 0x0030 */ 569 /* Turnon-delay and remap configuration values for 6030 are not 570 verified since the specification is not public */ 571 TWL6030_ADJUSTABLE_LDO(VAUX1_6030, 0x54, 1000, 3300, 1, 0x21), 572 TWL6030_ADJUSTABLE_LDO(VAUX2_6030, 0x58, 1000, 3300, 2, 0x21), 573 TWL6030_ADJUSTABLE_LDO(VAUX3_6030, 0x5c, 1000, 3300, 3, 0x21), 574 TWL6030_ADJUSTABLE_LDO(VMMC, 0x68, 1000, 3300, 4, 0x21), 575 TWL6030_ADJUSTABLE_LDO(VPP, 0x6c, 1000, 3300, 5, 0x21), 576 TWL6030_ADJUSTABLE_LDO(VUSIM, 0x74, 1000, 3300, 7, 0x21), 577 TWL6030_FIXED_LDO(VANA, 0x50, 2100, 15, 0, 0x21), 578 TWL6030_FIXED_LDO(VCXIO, 0x60, 1800, 16, 0, 0x21), 579 TWL6030_FIXED_LDO(VDAC, 0x64, 1800, 17, 0, 0x21), 580 TWL6030_FIXED_LDO(VUSB, 0x70, 3300, 18, 0, 0x21) 581 }; 582 583 static int __devinit twlreg_probe(struct platform_device *pdev) 584 { 585 int i; 586 struct twlreg_info *info; 587 struct regulator_init_data *initdata; 588 struct regulation_constraints *c; 589 struct regulator_dev *rdev; 590 591 for (i = 0, info = NULL; i < ARRAY_SIZE(twl_regs); i++) { 592 if (twl_regs[i].desc.id != pdev->id) 593 continue; 594 info = twl_regs + i; 595 break; 596 } 597 if (!info) 598 return -ENODEV; 599 600 initdata = pdev->dev.platform_data; 601 if (!initdata) 602 return -EINVAL; 603 604 /* Constrain board-specific capabilities according to what 605 * this driver and the chip itself can actually do. 606 */ 607 c = &initdata->constraints; 608 c->valid_modes_mask &= REGULATOR_MODE_NORMAL | REGULATOR_MODE_STANDBY; 609 c->valid_ops_mask &= REGULATOR_CHANGE_VOLTAGE 610 | REGULATOR_CHANGE_MODE 611 | REGULATOR_CHANGE_STATUS; 612 switch (pdev->id) { 613 case TWL4030_REG_VIO: 614 case TWL4030_REG_VDD1: 615 case TWL4030_REG_VDD2: 616 case TWL4030_REG_VPLL1: 617 case TWL4030_REG_VINTANA1: 618 case TWL4030_REG_VINTANA2: 619 case TWL4030_REG_VINTDIG: 620 c->always_on = true; 621 break; 622 default: 623 break; 624 } 625 626 rdev = regulator_register(&info->desc, &pdev->dev, initdata, info); 627 if (IS_ERR(rdev)) { 628 dev_err(&pdev->dev, "can't register %s, %ld\n", 629 info->desc.name, PTR_ERR(rdev)); 630 return PTR_ERR(rdev); 631 } 632 platform_set_drvdata(pdev, rdev); 633 634 twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_REMAP, 635 info->remap); 636 637 /* NOTE: many regulators support short-circuit IRQs (presentable 638 * as REGULATOR_OVER_CURRENT notifications?) configured via: 639 * - SC_CONFIG 640 * - SC_DETECT1 (vintana2, vmmc1/2, vaux1/2/3/4) 641 * - SC_DETECT2 (vusb, vdac, vio, vdd1/2, vpll2) 642 * - IT_CONFIG 643 */ 644 645 return 0; 646 } 647 648 static int __devexit twlreg_remove(struct platform_device *pdev) 649 { 650 regulator_unregister(platform_get_drvdata(pdev)); 651 return 0; 652 } 653 654 MODULE_ALIAS("platform:twl_reg"); 655 656 static struct platform_driver twlreg_driver = { 657 .probe = twlreg_probe, 658 .remove = __devexit_p(twlreg_remove), 659 /* NOTE: short name, to work around driver model truncation of 660 * "twl_regulator.12" (and friends) to "twl_regulator.1". 661 */ 662 .driver.name = "twl_reg", 663 .driver.owner = THIS_MODULE, 664 }; 665 666 static int __init twlreg_init(void) 667 { 668 return platform_driver_register(&twlreg_driver); 669 } 670 subsys_initcall(twlreg_init); 671 672 static void __exit twlreg_exit(void) 673 { 674 platform_driver_unregister(&twlreg_driver); 675 } 676 module_exit(twlreg_exit) 677 678 MODULE_DESCRIPTION("TWL regulator driver"); 679 MODULE_LICENSE("GPL"); 680