drivers/regulator/twl-regulator.c

   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         u8                      flags;
  55
  56         /* used by regulator core */
  57         struct regulator_desc   desc;
  58
  59         /* chip specific features */
  60         unsigned long           features;
  61
  62         /*
  63          * optional override functions for voltage set/get
  64          * these are currently only used for SMPS regulators
  65          */
  66         int                     (*get_voltage)(void *data);
  67         int                     (*set_voltage)(void *data, int target_uV);
  68
  69         /* data passed from board for external get/set voltage */
  70         void                    *data;
  71 };
  72
  73
  74 /* LDO control registers ... offset is from the base of its register bank.
  75  * The first three registers of all power resource banks help hardware to
  76  * manage the various resource groups.
  77  */
  78 /* Common offset in TWL4030/6030 */
  79 #define VREG_GRP                0
  80 /* TWL4030 register offsets */
  81 #define VREG_TYPE               1
  82 #define VREG_REMAP              2
  83 #define VREG_DEDICATED          3       /* LDO control */
  84 #define VREG_VOLTAGE_SMPS_4030  9
  85 /* TWL6030 register offsets */
  86 #define VREG_TRANS              1
  87 #define VREG_STATE              2
  88 #define VREG_VOLTAGE            3
  89 #define VREG_VOLTAGE_SMPS       4
  90 /* TWL6030 Misc register offsets */
  91 #define VREG_BC_ALL             1
  92 #define VREG_BC_REF             2
  93 #define VREG_BC_PROC            3
  94 #define VREG_BC_CLK_RST         4
  95
  96 /* TWL6030 LDO register values for CFG_STATE */
  97 #define TWL6030_CFG_STATE_OFF   0x00
  98 #define TWL6030_CFG_STATE_ON    0x01
  99 #define TWL6030_CFG_STATE_OFF2  0x02
 100 #define TWL6030_CFG_STATE_SLEEP 0x03
 101 #define TWL6030_CFG_STATE_GRP_SHIFT     5
 102 #define TWL6030_CFG_STATE_APP_SHIFT     2
 103 #define TWL6030_CFG_STATE_APP_MASK      (0x03 << TWL6030_CFG_STATE_APP_SHIFT)
 104 #define TWL6030_CFG_STATE_APP(v)        (((v) & TWL6030_CFG_STATE_APP_MASK) >>\
 105                                                 TWL6030_CFG_STATE_APP_SHIFT)
 106
 107 /* Flags for SMPS Voltage reading */
 108 #define SMPS_OFFSET_EN          BIT(0)
 109 #define SMPS_EXTENDED_EN        BIT(1)
 110
 111 /* twl6025 SMPS EPROM values */
 112 #define TWL6030_SMPS_OFFSET             0xB0
 113 #define TWL6030_SMPS_MULT               0xB3
 114 #define SMPS_MULTOFFSET_SMPS4   BIT(0)
 115 #define SMPS_MULTOFFSET_VIO     BIT(1)
 116 #define SMPS_MULTOFFSET_SMPS3   BIT(6)
 117
 118 static inline int
 119 twlreg_read(struct twlreg_info *info, unsigned slave_subgp, unsigned offset)
 120 {
 121         u8 value;
 122         int status;
 123
 124         status = twl_i2c_read_u8(slave_subgp,
 125                         &value, info->base + offset);
 126         return (status < 0) ? status : value;
 127 }
 128
 129 static inline int
 130 twlreg_write(struct twlreg_info *info, unsigned slave_subgp, unsigned offset,
 131                                                  u8 value)
 132 {
 133         return twl_i2c_write_u8(slave_subgp,
 134                         value, info->base + offset);
 135 }
 136
 137 /*----------------------------------------------------------------------*/
 138
 139 /* generic power resource operations, which work on all regulators */
 140
 141 static int twlreg_grp(struct regulator_dev *rdev)
 142 {
 143         return twlreg_read(rdev_get_drvdata(rdev), TWL_MODULE_PM_RECEIVER,
 144                                                                  VREG_GRP);
 145 }
 146
 147 /*
 148  * Enable/disable regulators by joining/leaving the P1 (processor) group.
 149  * We assume nobody else is updating the DEV_GRP registers.
 150  */
 151 /* definition for 4030 family */
 152 #define P3_GRP_4030     BIT(7)          /* "peripherals" */
 153 #define P2_GRP_4030     BIT(6)          /* secondary processor, modem, etc */
 154 #define P1_GRP_4030     BIT(5)          /* CPU/Linux */
 155 /* definition for 6030 family */
 156 #define P3_GRP_6030     BIT(2)          /* secondary processor, modem, etc */
 157 #define P2_GRP_6030     BIT(1)          /* "peripherals" */
 158 #define P1_GRP_6030     BIT(0)          /* CPU/Linux */
 159
 160 static int twl4030reg_is_enabled(struct regulator_dev *rdev)
 161 {
 162         int     state = twlreg_grp(rdev);
 163
 164         if (state < 0)
 165                 return state;
 166
 167         return state & P1_GRP_4030;
 168 }
 169
 170 static int twl6030reg_is_enabled(struct regulator_dev *rdev)
 171 {
 172         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 173         int                     grp = 0, val;
 174
 175         if (!(twl_class_is_6030() && (info->features & TWL6025_SUBCLASS)))
 176                 grp = twlreg_read(info, TWL_MODULE_PM_RECEIVER, VREG_GRP);
 177         if (grp < 0)
 178                 return grp;
 179
 180         if (!(twl_class_is_6030() && (info->features & TWL6025_SUBCLASS)))
 181                 grp &= P1_GRP_6030;
 182         else
 183                 grp = 1;
 184
 185         val = twlreg_read(info, TWL_MODULE_PM_RECEIVER, VREG_STATE);
 186         val = TWL6030_CFG_STATE_APP(val);
 187
 188         return grp && (val == TWL6030_CFG_STATE_ON);
 189 }
 190
 191 static int twl4030reg_enable(struct regulator_dev *rdev)
 192 {
 193         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 194         int                     grp;
 195         int                     ret;
 196
 197         grp = twlreg_read(info, TWL_MODULE_PM_RECEIVER, VREG_GRP);
 198         if (grp < 0)
 199                 return grp;
 200
 201         grp |= P1_GRP_4030;
 202
 203         ret = twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_GRP, grp);
 204
 205         udelay(info->delay);
 206
 207         return ret;
 208 }
 209
 210 static int twl6030reg_enable(struct regulator_dev *rdev)
 211 {
 212         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 213         int                     grp = 0;
 214         int                     ret;
 215
 216         if (!(twl_class_is_6030() && (info->features & TWL6025_SUBCLASS)))
 217                 grp = twlreg_read(info, TWL_MODULE_PM_RECEIVER, VREG_GRP);
 218         if (grp < 0)
 219                 return grp;
 220
 221         ret = twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_STATE,
 222                         grp << TWL6030_CFG_STATE_GRP_SHIFT |
 223                         TWL6030_CFG_STATE_ON);
 224
 225         udelay(info->delay);
 226
 227         return ret;
 228 }
 229
 230 static int twl4030reg_disable(struct regulator_dev *rdev)
 231 {
 232         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 233         int                     grp;
 234         int                     ret;
 235
 236         grp = twlreg_read(info, TWL_MODULE_PM_RECEIVER, VREG_GRP);
 237         if (grp < 0)
 238                 return grp;
 239
 240         grp &= ~(P1_GRP_4030 | P2_GRP_4030 | P3_GRP_4030);
 241
 242         ret = twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_GRP, grp);
 243
 244         return ret;
 245 }
 246
 247 static int twl6030reg_disable(struct regulator_dev *rdev)
 248 {
 249         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 250         int                     grp = 0;
 251         int                     ret;
 252
 253         if (!(twl_class_is_6030() && (info->features & TWL6025_SUBCLASS)))
 254                 grp = P1_GRP_6030 | P2_GRP_6030 | P3_GRP_6030;
 255
 256         /* For 6030, set the off state for all grps enabled */
 257         ret = twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_STATE,
 258                         (grp) << TWL6030_CFG_STATE_GRP_SHIFT |
 259                         TWL6030_CFG_STATE_OFF);
 260
 261         return ret;
 262 }
 263
 264 static int twl4030reg_get_status(struct regulator_dev *rdev)
 265 {
 266         int     state = twlreg_grp(rdev);
 267
 268         if (state < 0)
 269                 return state;
 270         state &= 0x0f;
 271
 272         /* assume state != WARM_RESET; we'd not be running...  */
 273         if (!state)
 274                 return REGULATOR_STATUS_OFF;
 275         return (state & BIT(3))
 276                 ? REGULATOR_STATUS_NORMAL
 277                 : REGULATOR_STATUS_STANDBY;
 278 }
 279
 280 static int twl6030reg_get_status(struct regulator_dev *rdev)
 281 {
 282         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 283         int                     val;
 284
 285         val = twlreg_grp(rdev);
 286         if (val < 0)
 287                 return val;
 288
 289         val = twlreg_read(info, TWL_MODULE_PM_RECEIVER, VREG_STATE);
 290
 291         switch (TWL6030_CFG_STATE_APP(val)) {
 292         case TWL6030_CFG_STATE_ON:
 293                 return REGULATOR_STATUS_NORMAL;
 294
 295         case TWL6030_CFG_STATE_SLEEP:
 296                 return REGULATOR_STATUS_STANDBY;
 297
 298         case TWL6030_CFG_STATE_OFF:
 299         case TWL6030_CFG_STATE_OFF2:
 300         default:
 301                 break;
 302         }
 303
 304         return REGULATOR_STATUS_OFF;
 305 }
 306
 307 static int twl4030reg_set_mode(struct regulator_dev *rdev, unsigned mode)
 308 {
 309         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 310         unsigned                message;
 311         int                     status;
 312
 313         /* We can only set the mode through state machine commands... */
 314         switch (mode) {
 315         case REGULATOR_MODE_NORMAL:
 316                 message = MSG_SINGULAR(DEV_GRP_P1, info->id, RES_STATE_ACTIVE);
 317                 break;
 318         case REGULATOR_MODE_STANDBY:
 319                 message = MSG_SINGULAR(DEV_GRP_P1, info->id, RES_STATE_SLEEP);
 320                 break;
 321         default:
 322                 return -EINVAL;
 323         }
 324
 325         /* Ensure the resource is associated with some group */
 326         status = twlreg_grp(rdev);
 327         if (status < 0)
 328                 return status;
 329         if (!(status & (P3_GRP_4030 | P2_GRP_4030 | P1_GRP_4030)))
 330                 return -EACCES;
 331
 332         status = twl_i2c_write_u8(TWL_MODULE_PM_MASTER,
 333                         message >> 8, TWL4030_PM_MASTER_PB_WORD_MSB);
 334         if (status < 0)
 335                 return status;
 336
 337         return twl_i2c_write_u8(TWL_MODULE_PM_MASTER,
 338                         message & 0xff, TWL4030_PM_MASTER_PB_WORD_LSB);
 339 }
 340
 341 static int twl6030reg_set_mode(struct regulator_dev *rdev, unsigned mode)
 342 {
 343         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 344         int grp = 0;
 345         int val;
 346
 347         if (!(twl_class_is_6030() && (info->features & TWL6025_SUBCLASS)))
 348                 grp = twlreg_read(info, TWL_MODULE_PM_RECEIVER, VREG_GRP);
 349
 350         if (grp < 0)
 351                 return grp;
 352
 353         /* Compose the state register settings */
 354         val = grp << TWL6030_CFG_STATE_GRP_SHIFT;
 355         /* We can only set the mode through state machine commands... */
 356         switch (mode) {
 357         case REGULATOR_MODE_NORMAL:
 358                 val |= TWL6030_CFG_STATE_ON;
 359                 break;
 360         case REGULATOR_MODE_STANDBY:
 361                 val |= TWL6030_CFG_STATE_SLEEP;
 362                 break;
 363
 364         default:
 365                 return -EINVAL;
 366         }
 367
 368         return twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_STATE, val);
 369 }
 370
 371 /*----------------------------------------------------------------------*/
 372
 373 /*
 374  * Support for adjustable-voltage LDOs uses a four bit (or less) voltage
 375  * select field in its control register.   We use tables indexed by VSEL
 376  * to record voltages in milliVolts.  (Accuracy is about three percent.)
 377  *
 378  * Note that VSEL values for VAUX2 changed in twl5030 and newer silicon;
 379  * currently handled by listing two slightly different VAUX2 regulators,
 380  * only one of which will be configured.
 381  *
 382  * VSEL values documented as "TI cannot support these values" are flagged
 383  * in these tables as UNSUP() values; we normally won't assign them.
 384  *
 385  * VAUX3 at 3V is incorrectly listed in some TI manuals as unsupported.
 386  * TI are revising the twl5030/tps659x0 specs to support that 3.0V setting.
 387  */
 388 #if 1 //def CONFIG_TWL4030_ALLOW_UNSUPPORTED
 389 #define UNSUP_MASK      0x0000
 390 #else
 391 #define UNSUP_MASK      0x8000
 392 #endif
 393
 394 #define UNSUP(x)        (UNSUP_MASK | (x))
 395 #define IS_UNSUP(x)     (UNSUP_MASK & (x))
 396 #define LDO_MV(x)       (~UNSUP_MASK & (x))
 397
 398
 399 static const u16 VAUX1_VSEL_table[] = {
 400         UNSUP(1500), UNSUP(1800), 2500, 2800,
 401         3000, 3000, 3000, 3000,
 402 };
 403 static const u16 VAUX2_4030_VSEL_table[] = {
 404         UNSUP(1000), UNSUP(1000), UNSUP(1200), 1300,
 405         1500, 1800, UNSUP(1850), 2500,
 406         UNSUP(2600), 2800, UNSUP(2850), UNSUP(3000),
 407         UNSUP(3150), UNSUP(3150), UNSUP(3150), UNSUP(3150),
 408 };
 409 static const u16 VAUX2_VSEL_table[] = {
 410         1700, 1700, 1900, 1300,
 411         1500, 1800, 2000, 2500,
 412         2100, 2800, 2200, 2300,
 413         2400, 2400, 2400, 2400,
 414 };
 415 static const u16 VAUX3_VSEL_table[] = {
 416         1500, 1800, 2500, 2800,
 417         3000, 3000, 3000, 3000,
 418 };
 419 static const u16 VAUX4_VSEL_table[] = {
 420         700, 1000, 1200, UNSUP(1300),
 421         1500, 1800, UNSUP(1850), 2500,
 422         UNSUP(2600), 2800, UNSUP(2850), UNSUP(3000),
 423         UNSUP(3150), UNSUP(3150), UNSUP(3150), UNSUP(3150),
 424 };
 425 static const u16 VMMC1_VSEL_table[] = {
 426         1850, 2850, 3000, 3150,
 427 };
 428 static const u16 VMMC2_VSEL_table[] = {
 429         UNSUP(1000), UNSUP(1000), UNSUP(1200), UNSUP(1300),
 430         UNSUP(1500), UNSUP(1800), 1850, UNSUP(2500),
 431         2600, 2800, 2850, 3000,
 432         3150, 3150, 3150, 3150,
 433 };
 434 static const u16 VPLL1_VSEL_table[] = {
 435         1000, 1200, 1300, 1800,
 436         UNSUP(2800), UNSUP(3000), UNSUP(3000), UNSUP(3000),
 437 };
 438 static const u16 VPLL2_VSEL_table[] = {
 439         700, 1000, 1200, 1300,
 440         UNSUP(1500), 1800, UNSUP(1850), UNSUP(2500),
 441         UNSUP(2600), UNSUP(2800), UNSUP(2850), UNSUP(3000),
 442         UNSUP(3150), UNSUP(3150), UNSUP(3150), UNSUP(3150),
 443 };
 444 static const u16 VSIM_VSEL_table[] = {
 445         UNSUP(1000), UNSUP(1200), UNSUP(1300), 1800,
 446         2800, 3000, 3000, 3000,
 447 };
 448 static const u16 VDAC_VSEL_table[] = {
 449         1200, 1300, 1800, 1800,
 450 };
 451 static const u16 VDD1_VSEL_table[] = {
 452         800, 1450,
 453 };
 454 static const u16 VDD2_VSEL_table[] = {
 455         800, 1450, 1500,
 456 };
 457 static const u16 VIO_VSEL_table[] = {
 458         1800, 1850,
 459 };
 460 static const u16 VINTANA2_VSEL_table[] = {
 461         2500, 2750,
 462 };
 463
 464 static int twl4030ldo_list_voltage(struct regulator_dev *rdev, unsigned index)
 465 {
 466         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 467         int                     mV = info->table[index];
 468
 469         return IS_UNSUP(mV) ? 0 : (LDO_MV(mV) * 1000);
 470 }
 471
 472 static int
 473 twl4030ldo_set_voltage(struct regulator_dev *rdev, int min_uV, int max_uV,
 474                        unsigned *selector)
 475 {
 476         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 477         int                     vsel;
 478
 479         for (vsel = 0; vsel < info->table_len; vsel++) {
 480                 int mV = info->table[vsel];
 481                 int uV;
 482
 483                 if (IS_UNSUP(mV))
 484                         continue;
 485                 uV = LDO_MV(mV) * 1000;
 486
 487                 /* REVISIT for VAUX2, first match may not be best/lowest */
 488
 489                 /* use the first in-range value */
 490                 if (min_uV <= uV && uV <= max_uV) {
 491                         *selector = vsel;
 492                         return twlreg_write(info, TWL_MODULE_PM_RECEIVER,
 493                                                         VREG_VOLTAGE, vsel);
 494                 }
 495         }
 496
 497         return -EDOM;
 498 }
 499
 500 static int twl4030ldo_get_voltage(struct regulator_dev *rdev)
 501 {
 502         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 503         int             vsel = twlreg_read(info, TWL_MODULE_PM_RECEIVER,
 504                                                                 VREG_VOLTAGE);
 505
 506         if (vsel < 0)
 507                 return vsel;
 508
 509         vsel &= info->table_len - 1;
 510         return LDO_MV(info->table[vsel]) * 1000;
 511 }
 512
 513 static struct regulator_ops twl4030ldo_ops = {
 514         .list_voltage   = twl4030ldo_list_voltage,
 515
 516         .set_voltage    = twl4030ldo_set_voltage,
 517         .get_voltage    = twl4030ldo_get_voltage,
 518
 519         .enable         = twl4030reg_enable,
 520         .disable        = twl4030reg_disable,
 521         .is_enabled     = twl4030reg_is_enabled,
 522
 523         .set_mode       = twl4030reg_set_mode,
 524
 525         .get_status     = twl4030reg_get_status,
 526 };
 527
 528 static int
 529 twl4030smps_set_voltage(struct regulator_dev *rdev, int min_uV, int max_uV,
 530                         unsigned *selector)
 531 {
 532         struct twlreg_info *info = rdev_get_drvdata(rdev);
 533         int vsel = DIV_ROUND_UP(min_uV - 600000, 12500);
 534
 535         if (info->set_voltage) {
 536                 return info->set_voltage(info->data, min_uV);
 537         } else {
 538                 twlreg_write(info, TWL_MODULE_PM_RECEIVER,
 539                         VREG_VOLTAGE_SMPS_4030, vsel);
 540         }
 541
 542         return 0;
 543 }
 544
 545 static int twl4030smps_get_voltage(struct regulator_dev *rdev)
 546 {
 547         struct twlreg_info *info = rdev_get_drvdata(rdev);
 548         int vsel;
 549
 550         if (info->get_voltage)
 551                 return info->get_voltage(info->data);
 552
 553         vsel = twlreg_read(info, TWL_MODULE_PM_RECEIVER,
 554                 VREG_VOLTAGE_SMPS_4030);
 555
 556         return vsel * 12500 + 600000;
 557 }
 558
 559 static struct regulator_ops twl4030smps_ops = {
 560         .set_voltage    = twl4030smps_set_voltage,
 561         .get_voltage    = twl4030smps_get_voltage,
 562 };
 563
 564 static int twl6030coresmps_set_voltage(struct regulator_dev *rdev, int min_uV,
 565         int max_uV, unsigned *selector)
 566 {
 567         struct twlreg_info *info = rdev_get_drvdata(rdev);
 568
 569         if (info->set_voltage)
 570                 return info->set_voltage(info->data, min_uV);
 571
 572         return -ENODEV;
 573 }
 574
 575 static int twl6030coresmps_get_voltage(struct regulator_dev *rdev)
 576 {
 577         struct twlreg_info *info = rdev_get_drvdata(rdev);
 578
 579         if (info->get_voltage)
 580                 return info->get_voltage(info->data);
 581
 582         return -ENODEV;
 583 }
 584
 585 static struct regulator_ops twl6030coresmps_ops = {
 586         .set_voltage    = twl6030coresmps_set_voltage,
 587         .get_voltage    = twl6030coresmps_get_voltage,
 588 };
 589
 590 static int twl6030ldo_list_voltage(struct regulator_dev *rdev, unsigned index)
 591 {
 592         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 593
 594         return ((info->min_mV + (index * 100)) * 1000);
 595 }
 596
 597 static int
 598 twl6030ldo_set_voltage(struct regulator_dev *rdev, int min_uV, int max_uV,
 599                        unsigned *selector)
 600 {
 601         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 602         int                     vsel;
 603
 604         if ((min_uV/1000 < info->min_mV) || (max_uV/1000 > info->max_mV))
 605                 return -EDOM;
 606
 607         /*
 608          * Use the below formula to calculate vsel
 609          * mV = 1000mv + 100mv * (vsel - 1)
 610          */
 611         vsel = (min_uV/1000 - 1000)/100 + 1;
 612         *selector = vsel;
 613         return twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_VOLTAGE, vsel);
 614
 615 }
 616
 617 static int twl6030ldo_get_voltage(struct regulator_dev *rdev)
 618 {
 619         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 620         int             vsel = twlreg_read(info, TWL_MODULE_PM_RECEIVER,
 621                                                                 VREG_VOLTAGE);
 622
 623         if (vsel < 0)
 624                 return vsel;
 625
 626         /*
 627          * Use the below formula to calculate vsel
 628          * mV = 1000mv + 100mv * (vsel - 1)
 629          */
 630         return (1000 + (100 * (vsel - 1))) * 1000;
 631 }
 632
 633 static struct regulator_ops twl6030ldo_ops = {
 634         .list_voltage   = twl6030ldo_list_voltage,
 635
 636         .set_voltage    = twl6030ldo_set_voltage,
 637         .get_voltage    = twl6030ldo_get_voltage,
 638
 639         .enable         = twl6030reg_enable,
 640         .disable        = twl6030reg_disable,
 641         .is_enabled     = twl6030reg_is_enabled,
 642
 643         .set_mode       = twl6030reg_set_mode,
 644
 645         .get_status     = twl6030reg_get_status,
 646 };
 647
 648 /*----------------------------------------------------------------------*/
 649
 650 /*
 651  * Fixed voltage LDOs don't have a VSEL field to update.
 652  */
 653 static int twlfixed_list_voltage(struct regulator_dev *rdev, unsigned index)
 654 {
 655         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 656
 657         return info->min_mV * 1000;
 658 }
 659
 660 static int twlfixed_get_voltage(struct regulator_dev *rdev)
 661 {
 662         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 663
 664         return info->min_mV * 1000;
 665 }
 666
 667 static struct regulator_ops twl4030fixed_ops = {
 668         .list_voltage   = twlfixed_list_voltage,
 669
 670         .get_voltage    = twlfixed_get_voltage,
 671
 672         .enable         = twl4030reg_enable,
 673         .disable        = twl4030reg_disable,
 674         .is_enabled     = twl4030reg_is_enabled,
 675
 676         .set_mode       = twl4030reg_set_mode,
 677
 678         .get_status     = twl4030reg_get_status,
 679 };
 680
 681 static struct regulator_ops twl6030fixed_ops = {
 682         .list_voltage   = twlfixed_list_voltage,
 683
 684         .get_voltage    = twlfixed_get_voltage,
 685
 686         .enable         = twl6030reg_enable,
 687         .disable        = twl6030reg_disable,
 688         .is_enabled     = twl6030reg_is_enabled,
 689
 690         .set_mode       = twl6030reg_set_mode,
 691
 692         .get_status     = twl6030reg_get_status,
 693 };
 694
 695 static struct regulator_ops twl6030_fixed_resource = {
 696         .enable         = twl6030reg_enable,
 697         .disable        = twl6030reg_disable,
 698         .is_enabled     = twl6030reg_is_enabled,
 699         .get_status     = twl6030reg_get_status,
 700 };
 701
 702 /*
 703  * SMPS status and control
 704  */
 705
 706 static int twl6030smps_list_voltage(struct regulator_dev *rdev, unsigned index)
 707 {
 708         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 709
 710         int voltage = 0;
 711
 712         switch (info->flags) {
 713         case SMPS_OFFSET_EN:
 714                 voltage = 100000;
 715                 /* fall through */
 716         case 0:
 717                 switch (index) {
 718                 case 0:
 719                         voltage = 0;
 720                         break;
 721                 case 58:
 722                         voltage = 1350 * 1000;
 723                         break;
 724                 case 59:
 725                         voltage = 1500 * 1000;
 726                         break;
 727                 case 60:
 728                         voltage = 1800 * 1000;
 729                         break;
 730                 case 61:
 731                         voltage = 1900 * 1000;
 732                         break;
 733                 case 62:
 734                         voltage = 2100 * 1000;
 735                         break;
 736                 default:
 737                         voltage += (600000 + (12500 * (index - 1)));
 738                 }
 739                 break;
 740         case SMPS_EXTENDED_EN:
 741                 switch (index) {
 742                 case 0:
 743                         voltage = 0;
 744                         break;
 745                 case 58:
 746                         voltage = 2084 * 1000;
 747                         break;
 748                 case 59:
 749                         voltage = 2315 * 1000;
 750                         break;
 751                 case 60:
 752                         voltage = 2778 * 1000;
 753                         break;
 754                 case 61:
 755                         voltage = 2932 * 1000;
 756                         break;
 757                 case 62:
 758                         voltage = 3241 * 1000;
 759                         break;
 760                 default:
 761                         voltage = (1852000 + (38600 * (index - 1)));
 762                 }
 763                 break;
 764         case SMPS_OFFSET_EN | SMPS_EXTENDED_EN:
 765                 switch (index) {
 766                 case 0:
 767                         voltage = 0;
 768                         break;
 769                 case 58:
 770                         voltage = 4167 * 1000;
 771                         break;
 772                 case 59:
 773                         voltage = 2315 * 1000;
 774                         break;
 775                 case 60:
 776                         voltage = 2778 * 1000;
 777                         break;
 778                 case 61:
 779                         voltage = 2932 * 1000;
 780                         break;
 781                 case 62:
 782                         voltage = 3241 * 1000;
 783                         break;
 784                 default:
 785                         voltage = (2161000 + (38600 * (index - 1)));
 786                 }
 787                 break;
 788         }
 789
 790         return voltage;
 791 }
 792
 793 static int
 794 twl6030smps_set_voltage(struct regulator_dev *rdev, int min_uV, int max_uV,
 795                         unsigned int *selector)
 796 {
 797         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 798         int     vsel = 0;
 799
 800         switch (info->flags) {
 801         case 0:
 802                 if (min_uV == 0)
 803                         vsel = 0;
 804                 else if ((min_uV >= 600000) && (max_uV <= 1300000)) {
 805                         vsel = (min_uV - 600000) / 125;
 806                         if (vsel % 100)
 807                                 vsel += 100;
 808                         vsel /= 100;
 809                         vsel++;
 810                 }
 811                 /* Values 1..57 for vsel are linear and can be calculated
 812                  * values 58..62 are non linear.
 813                  */
 814                 else if ((min_uV > 1900000) && (max_uV >= 2100000))
 815                         vsel = 62;
 816                 else if ((min_uV > 1800000) && (max_uV >= 1900000))
 817                         vsel = 61;
 818                 else if ((min_uV > 1500000) && (max_uV >= 1800000))
 819                         vsel = 60;
 820                 else if ((min_uV > 1350000) && (max_uV >= 1500000))
 821                         vsel = 59;
 822                 else if ((min_uV > 1300000) && (max_uV >= 1350000))
 823                         vsel = 58;
 824                 else
 825                         return -EINVAL;
 826                 break;
 827         case SMPS_OFFSET_EN:
 828                 if (min_uV == 0)
 829                         vsel = 0;
 830                 else if ((min_uV >= 700000) && (max_uV <= 1420000)) {
 831                         vsel = (min_uV - 700000) / 125;
 832                         if (vsel % 100)
 833                                 vsel += 100;
 834                         vsel /= 100;
 835                         vsel++;
 836                 }
 837                 /* Values 1..57 for vsel are linear and can be calculated
 838                  * values 58..62 are non linear.
 839                  */
 840                 else if ((min_uV > 1900000) && (max_uV >= 2100000))
 841                         vsel = 62;
 842                 else if ((min_uV > 1800000) && (max_uV >= 1900000))
 843                         vsel = 61;
 844                 else if ((min_uV > 1350000) && (max_uV >= 1800000))
 845                         vsel = 60;
 846                 else if ((min_uV > 1350000) && (max_uV >= 1500000))
 847                         vsel = 59;
 848                 else if ((min_uV > 1300000) && (max_uV >= 1350000))
 849                         vsel = 58;
 850                 else
 851                         return -EINVAL;
 852                 break;
 853         case SMPS_EXTENDED_EN:
 854                 if (min_uV == 0)
 855                         vsel = 0;
 856                 else if ((min_uV >= 1852000) && (max_uV <= 4013600)) {
 857                         vsel = (min_uV - 1852000) / 386;
 858                         if (vsel % 100)
 859                                 vsel += 100;
 860                         vsel /= 100;
 861                         vsel++;
 862                 }
 863                 break;
 864         case SMPS_OFFSET_EN|SMPS_EXTENDED_EN:
 865                 if (min_uV == 0)
 866                         vsel = 0;
 867                 else if ((min_uV >= 2161000) && (max_uV <= 4321000)) {
 868                         vsel = (min_uV - 1852000) / 386;
 869                         if (vsel % 100)
 870                                 vsel += 100;
 871                         vsel /= 100;
 872                         vsel++;
 873                 }
 874                 break;
 875         }
 876
 877         *selector = vsel;
 878
 879         return twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_VOLTAGE_SMPS,
 880                                                         vsel);
 881 }
 882
 883 static int twl6030smps_get_voltage_sel(struct regulator_dev *rdev)
 884 {
 885         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 886
 887         return twlreg_read(info, TWL_MODULE_PM_RECEIVER, VREG_VOLTAGE_SMPS);
 888 }
 889
 890 static struct regulator_ops twlsmps_ops = {
 891         .list_voltage           = twl6030smps_list_voltage,
 892
 893         .set_voltage            = twl6030smps_set_voltage,
 894         .get_voltage_sel        = twl6030smps_get_voltage_sel,
 895
 896         .enable                 = twl6030reg_enable,
 897         .disable                = twl6030reg_disable,
 898         .is_enabled             = twl6030reg_is_enabled,
 899
 900         .set_mode               = twl6030reg_set_mode,
 901
 902         .get_status             = twl6030reg_get_status,
 903 };
 904
 905 /*----------------------------------------------------------------------*/
 906
 907 #define TWL4030_FIXED_LDO(label, offset, mVolts, num, turnon_delay, \
 908                         remap_conf) \
 909                 TWL_FIXED_LDO(label, offset, mVolts, num, turnon_delay, \
 910                         remap_conf, TWL4030, twl4030fixed_ops)
 911 #define TWL6030_FIXED_LDO(label, offset, mVolts, turnon_delay) \
 912                 TWL_FIXED_LDO(label, offset, mVolts, 0x0, turnon_delay, \
 913                         0x0, TWL6030, twl6030fixed_ops)
 914
 915 #define TWL4030_ADJUSTABLE_LDO(label, offset, num, turnon_delay, remap_conf) { \
 916         .base = offset, \
 917         .id = num, \
 918         .table_len = ARRAY_SIZE(label##_VSEL_table), \
 919         .table = label##_VSEL_table, \
 920         .delay = turnon_delay, \
 921         .remap = remap_conf, \
 922         .desc = { \
 923                 .name = #label, \
 924                 .id = TWL4030_REG_##label, \
 925                 .n_voltages = ARRAY_SIZE(label##_VSEL_table), \
 926                 .ops = &twl4030ldo_ops, \
 927                 .type = REGULATOR_VOLTAGE, \
 928                 .owner = THIS_MODULE, \
 929                 }, \
 930         }
 931
 932 #define TWL4030_ADJUSTABLE_SMPS(label, offset, num, turnon_delay, remap_conf) \
 933         { \
 934         .base = offset, \
 935         .id = num, \
 936         .delay = turnon_delay, \
 937         .remap = remap_conf, \
 938         .desc = { \
 939                 .name = #label, \
 940                 .id = TWL4030_REG_##label, \
 941                 .ops = &twl4030smps_ops, \
 942                 .type = REGULATOR_VOLTAGE, \
 943                 .owner = THIS_MODULE, \
 944                 }, \
 945         }
 946
 947 #define TWL6030_ADJUSTABLE_SMPS(label) { \
 948         .desc = { \
 949                 .name = #label, \
 950                 .id = TWL6030_REG_##label, \
 951                 .ops = &twl6030coresmps_ops, \
 952                 .type = REGULATOR_VOLTAGE, \
 953                 .owner = THIS_MODULE, \
 954                 }, \
 955         }
 956
 957 #define TWL6030_ADJUSTABLE_LDO(label, offset, min_mVolts, max_mVolts) { \
 958         .base = offset, \
 959         .min_mV = min_mVolts, \
 960         .max_mV = max_mVolts, \
 961         .desc = { \
 962                 .name = #label, \
 963                 .id = TWL6030_REG_##label, \
 964                 .n_voltages = (max_mVolts - min_mVolts)/100 + 1, \
 965                 .ops = &twl6030ldo_ops, \
 966                 .type = REGULATOR_VOLTAGE, \
 967                 .owner = THIS_MODULE, \
 968                 }, \
 969         }
 970
 971 #define TWL6025_ADJUSTABLE_LDO(label, offset, min_mVolts, max_mVolts) { \
 972         .base = offset, \
 973         .min_mV = min_mVolts, \
 974         .max_mV = max_mVolts, \
 975         .desc = { \
 976                 .name = #label, \
 977                 .id = TWL6025_REG_##label, \
 978                 .n_voltages = ((max_mVolts - min_mVolts)/100) + 1, \
 979                 .ops = &twl6030ldo_ops, \
 980                 .type = REGULATOR_VOLTAGE, \
 981                 .owner = THIS_MODULE, \
 982                 }, \
 983         }
 984
 985 #define TWL_FIXED_LDO(label, offset, mVolts, num, turnon_delay, remap_conf, \
 986                 family, operations) { \
 987         .base = offset, \
 988         .id = num, \
 989         .min_mV = mVolts, \
 990         .delay = turnon_delay, \
 991         .remap = remap_conf, \
 992         .desc = { \
 993                 .name = #label, \
 994                 .id = family##_REG_##label, \
 995                 .n_voltages = 1, \
 996                 .ops = &operations, \
 997                 .type = REGULATOR_VOLTAGE, \
 998                 .owner = THIS_MODULE, \
 999                 }, \
1000         }
1001
1002 #define TWL6030_FIXED_RESOURCE(label, offset, turnon_delay) { \
1003         .base = offset, \
1004         .delay = turnon_delay, \
1005         .desc = { \
1006                 .name = #label, \
1007                 .id = TWL6030_REG_##label, \
1008                 .ops = &twl6030_fixed_resource, \
1009                 .type = REGULATOR_VOLTAGE, \
1010                 .owner = THIS_MODULE, \
1011                 }, \
1012         }
1013
1014 #define TWL6025_ADJUSTABLE_SMPS(label, offset) { \
1015         .base = offset, \
1016         .min_mV = 600, \
1017         .max_mV = 2100, \
1018         .desc = { \
1019                 .name = #label, \
1020                 .id = TWL6025_REG_##label, \
1021                 .n_voltages = 63, \
1022                 .ops = &twlsmps_ops, \
1023                 .type = REGULATOR_VOLTAGE, \
1024                 .owner = THIS_MODULE, \
1025                 }, \
1026         }
1027
1028 /*
1029  * We list regulators here if systems need some level of
1030  * software control over them after boot.
1031  */
1032 static struct twlreg_info twl_regs[] = {
1033         TWL4030_ADJUSTABLE_LDO(VAUX1, 0x17, 1, 100, 0x08),
1034         TWL4030_ADJUSTABLE_LDO(VAUX2_4030, 0x1b, 2, 100, 0x08),
1035         TWL4030_ADJUSTABLE_LDO(VAUX2, 0x1b, 2, 100, 0x08),
1036         TWL4030_ADJUSTABLE_LDO(VAUX3, 0x1f, 3, 100, 0x08),
1037         TWL4030_ADJUSTABLE_LDO(VAUX4, 0x23, 4, 100, 0x08),
1038         TWL4030_ADJUSTABLE_LDO(VMMC1, 0x27, 5, 100, 0x08),
1039         TWL4030_ADJUSTABLE_LDO(VMMC2, 0x2b, 6, 100, 0x08),
1040         TWL4030_ADJUSTABLE_LDO(VPLL1, 0x2f, 7, 100, 0x00),
1041         TWL4030_ADJUSTABLE_LDO(VPLL2, 0x33, 8, 100, 0x08),
1042         TWL4030_ADJUSTABLE_LDO(VSIM, 0x37, 9, 100, 0x00),
1043         TWL4030_ADJUSTABLE_LDO(VDAC, 0x3b, 10, 100, 0x08),
1044         TWL4030_FIXED_LDO(VINTANA1, 0x3f, 1500, 11, 100, 0x08),
1045         TWL4030_ADJUSTABLE_LDO(VINTANA2, 0x43, 12, 100, 0x08),
1046         TWL4030_FIXED_LDO(VINTDIG, 0x47, 1500, 13, 100, 0x08),
1047         TWL4030_ADJUSTABLE_LDO(VIO, 0x4b, 14, 1000, 0x08),
1048         TWL4030_ADJUSTABLE_SMPS(VDD1, 0x55, 15, 1000, 0x08),
1049         TWL4030_ADJUSTABLE_SMPS(VDD2, 0x63, 16, 1000, 0x08),
1050         TWL4030_FIXED_LDO(VUSB1V5, 0x71, 1500, 17, 100, 0x08),
1051         TWL4030_FIXED_LDO(VUSB1V8, 0x74, 1800, 18, 100, 0x08),
1052         TWL4030_FIXED_LDO(VUSB3V1, 0x77, 3100, 19, 150, 0x08),
1053         /* VUSBCP is managed *only* by the USB subchip */
1054
1055         /* 6030 REG with base as PMC Slave Misc : 0x0030 */
1056         /* Turnon-delay and remap configuration values for 6030 are not
1057            verified since the specification is not public */
1058         TWL6030_ADJUSTABLE_SMPS(VDD1),
1059         TWL6030_ADJUSTABLE_SMPS(VDD2),
1060         TWL6030_ADJUSTABLE_SMPS(VDD3),
1061         TWL6030_ADJUSTABLE_LDO(VAUX1_6030, 0x54, 1000, 3300),
1062         TWL6030_ADJUSTABLE_LDO(VAUX2_6030, 0x58, 1000, 3300),
1063         TWL6030_ADJUSTABLE_LDO(VAUX3_6030, 0x5c, 1000, 3300),
1064         TWL6030_ADJUSTABLE_LDO(VMMC, 0x68, 1000, 3300),
1065         TWL6030_ADJUSTABLE_LDO(VPP, 0x6c, 1000, 3300),
1066         TWL6030_ADJUSTABLE_LDO(VUSIM, 0x74, 1000, 3300),
1067         TWL6030_FIXED_LDO(VANA, 0x50, 2100, 0),
1068         TWL6030_FIXED_LDO(VCXIO, 0x60, 1800, 0),
1069         TWL6030_FIXED_LDO(VDAC, 0x64, 1800, 0),
1070         TWL6030_FIXED_LDO(VUSB, 0x70, 3300, 0),
1071         TWL6030_FIXED_RESOURCE(CLK32KG, 0x8C, 0),
1072
1073         /* 6025 are renamed compared to 6030 versions */
1074         TWL6025_ADJUSTABLE_LDO(LDO2, 0x54, 1000, 3300),
1075         TWL6025_ADJUSTABLE_LDO(LDO4, 0x58, 1000, 3300),
1076         TWL6025_ADJUSTABLE_LDO(LDO3, 0x5c, 1000, 3300),
1077         TWL6025_ADJUSTABLE_LDO(LDO5, 0x68, 1000, 3300),
1078         TWL6025_ADJUSTABLE_LDO(LDO1, 0x6c, 1000, 3300),
1079         TWL6025_ADJUSTABLE_LDO(LDO7, 0x74, 1000, 3300),
1080         TWL6025_ADJUSTABLE_LDO(LDO6, 0x60, 1000, 3300),
1081         TWL6025_ADJUSTABLE_LDO(LDOLN, 0x64, 1000, 3300),
1082         TWL6025_ADJUSTABLE_LDO(LDOUSB, 0x70, 1000, 3300),
1083
1084         TWL6025_ADJUSTABLE_SMPS(SMPS3, 0x34),
1085         TWL6025_ADJUSTABLE_SMPS(SMPS4, 0x10),
1086         TWL6025_ADJUSTABLE_SMPS(VIO, 0x16),
1087 };
1088
1089 static u8 twl_get_smps_offset(void)
1090 {
1091         u8 value;
1092
1093         twl_i2c_read_u8(TWL_MODULE_PM_RECEIVER, &value,
1094                         TWL6030_SMPS_OFFSET);
1095         return value;
1096 }
1097
1098 static u8 twl_get_smps_mult(void)
1099 {
1100         u8 value;
1101
1102         twl_i2c_read_u8(TWL_MODULE_PM_RECEIVER, &value,
1103                         TWL6030_SMPS_MULT);
1104         return value;
1105 }
1106
1107 static int __devinit twlreg_probe(struct platform_device *pdev)
1108 {
1109         int                             i;
1110         struct twlreg_info              *info;
1111         struct regulator_init_data      *initdata;
1112         struct regulation_constraints   *c;
1113         struct regulator_dev            *rdev;
1114         struct twl_regulator_driver_data        *drvdata;
1115
1116         for (i = 0, info = NULL; i < ARRAY_SIZE(twl_regs); i++) {
1117                 if (twl_regs[i].desc.id != pdev->id)
1118                         continue;
1119                 info = twl_regs + i;
1120                 break;
1121         }
1122         if (!info)
1123                 return -ENODEV;
1124
1125         initdata = pdev->dev.platform_data;
1126         if (!initdata)
1127                 return -EINVAL;
1128
1129         drvdata = initdata->driver_data;
1130
1131         if (!drvdata)
1132                 return -EINVAL;
1133
1134         /* copy the driver data into regulator data */
1135         info->features = drvdata->features;
1136         info->data = drvdata->data;
1137         info->set_voltage = drvdata->set_voltage;
1138         info->get_voltage = drvdata->get_voltage;
1139
1140         /* Constrain board-specific capabilities according to what
1141          * this driver and the chip itself can actually do.
1142          */
1143         c = &initdata->constraints;
1144         c->valid_modes_mask &= REGULATOR_MODE_NORMAL | REGULATOR_MODE_STANDBY;
1145         c->valid_ops_mask &= REGULATOR_CHANGE_VOLTAGE
1146                                 | REGULATOR_CHANGE_MODE
1147                                 | REGULATOR_CHANGE_STATUS;
1148         switch (pdev->id) {
1149         case TWL4030_REG_VIO:
1150         case TWL4030_REG_VDD1:
1151         case TWL4030_REG_VDD2:
1152         case TWL4030_REG_VPLL1:
1153         case TWL4030_REG_VINTANA1:
1154         case TWL4030_REG_VINTANA2:
1155         case TWL4030_REG_VINTDIG:
1156                 c->always_on = true;
1157                 break;
1158         default:
1159                 break;
1160         }
1161
1162         switch (pdev->id) {
1163         case TWL6025_REG_SMPS3:
1164                 if (twl_get_smps_mult() & SMPS_MULTOFFSET_SMPS3)
1165                         info->flags |= SMPS_EXTENDED_EN;
1166                 if (twl_get_smps_offset() & SMPS_MULTOFFSET_SMPS3)
1167                         info->flags |= SMPS_OFFSET_EN;
1168                 break;
1169         case TWL6025_REG_SMPS4:
1170                 if (twl_get_smps_mult() & SMPS_MULTOFFSET_SMPS4)
1171                         info->flags |= SMPS_EXTENDED_EN;
1172                 if (twl_get_smps_offset() & SMPS_MULTOFFSET_SMPS4)
1173                         info->flags |= SMPS_OFFSET_EN;
1174                 break;
1175         case TWL6025_REG_VIO:
1176                 if (twl_get_smps_mult() & SMPS_MULTOFFSET_VIO)
1177                         info->flags |= SMPS_EXTENDED_EN;
1178                 if (twl_get_smps_offset() & SMPS_MULTOFFSET_VIO)
1179                         info->flags |= SMPS_OFFSET_EN;
1180                 break;
1181         }
1182
1183         rdev = regulator_register(&info->desc, &pdev->dev, initdata, info);
1184         if (IS_ERR(rdev)) {
1185                 dev_err(&pdev->dev, "can't register %s, %ld\n",
1186                                 info->desc.name, PTR_ERR(rdev));
1187                 return PTR_ERR(rdev);
1188         }
1189         platform_set_drvdata(pdev, rdev);
1190
1191         if (twl_class_is_4030())
1192                 twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_REMAP,
1193                                                 info->remap);
1194
1195         /* NOTE:  many regulators support short-circuit IRQs (presentable
1196          * as REGULATOR_OVER_CURRENT notifications?) configured via:
1197          *  - SC_CONFIG
1198          *  - SC_DETECT1 (vintana2, vmmc1/2, vaux1/2/3/4)
1199          *  - SC_DETECT2 (vusb, vdac, vio, vdd1/2, vpll2)
1200          *  - IT_CONFIG
1201          */
1202
1203         return 0;
1204 }
1205
1206 static int __devexit twlreg_remove(struct platform_device *pdev)
1207 {
1208         regulator_unregister(platform_get_drvdata(pdev));
1209         return 0;
1210 }
1211
1212 MODULE_ALIAS("platform:twl_reg");
1213
1214 static struct platform_driver twlreg_driver = {
1215         .probe          = twlreg_probe,
1216         .remove         = __devexit_p(twlreg_remove),
1217         /* NOTE: short name, to work around driver model truncation of
1218          * "twl_regulator.12" (and friends) to "twl_regulator.1".
1219          */
1220         .driver.name    = "twl_reg",
1221         .driver.owner   = THIS_MODULE,
1222 };
1223
1224 static int __init twlreg_init(void)
1225 {
1226         return platform_driver_register(&twlreg_driver);
1227 }
1228 subsys_initcall(twlreg_init);
1229
1230 static void __exit twlreg_exit(void)
1231 {
1232         platform_driver_unregister(&twlreg_driver);
1233 }
1234 module_exit(twlreg_exit)
1235
1236 MODULE_DESCRIPTION("TWL regulator driver");
1237 MODULE_LICENSE("GPL");