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         /* 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 /* TWL6030 LDO register values for CFG_STATE */
  80 #define TWL6030_CFG_STATE_OFF   0x00
  81 #define TWL6030_CFG_STATE_ON    0x01
  82 #define TWL6030_CFG_STATE_OFF2  0x02
  83 #define TWL6030_CFG_STATE_SLEEP 0x03
  84 #define TWL6030_CFG_STATE_GRP_SHIFT     5
  85 #define TWL6030_CFG_STATE_APP_SHIFT     2
  86 #define TWL6030_CFG_STATE_APP_MASK      (0x03 << TWL6030_CFG_STATE_APP_SHIFT)
  87 #define TWL6030_CFG_STATE_APP(v)        (((v) & TWL6030_CFG_STATE_APP_MASK) >>\
  88                                                 TWL6030_CFG_STATE_APP_SHIFT)
  89
  90 static inline int
  91 twlreg_read(struct twlreg_info *info, unsigned slave_subgp, unsigned offset)
  92 {
  93         u8 value;
  94         int status;
  95
  96         status = twl_i2c_read_u8(slave_subgp,
  97                         &value, info->base + offset);
  98         return (status < 0) ? status : value;
  99 }
 100
 101 static inline int
 102 twlreg_write(struct twlreg_info *info, unsigned slave_subgp, unsigned offset,
 103                                                  u8 value)
 104 {
 105         return twl_i2c_write_u8(slave_subgp,
 106                         value, info->base + offset);
 107 }
 108
 109 /*----------------------------------------------------------------------*/
 110
 111 /* generic power resource operations, which work on all regulators */
 112
 113 static int twlreg_grp(struct regulator_dev *rdev)
 114 {
 115         return twlreg_read(rdev_get_drvdata(rdev), TWL_MODULE_PM_RECEIVER,
 116                                                                  VREG_GRP);
 117 }
 118
 119 /*
 120  * Enable/disable regulators by joining/leaving the P1 (processor) group.
 121  * We assume nobody else is updating the DEV_GRP registers.
 122  */
 123 /* definition for 4030 family */
 124 #define P3_GRP_4030     BIT(7)          /* "peripherals" */
 125 #define P2_GRP_4030     BIT(6)          /* secondary processor, modem, etc */
 126 #define P1_GRP_4030     BIT(5)          /* CPU/Linux */
 127 /* definition for 6030 family */
 128 #define P3_GRP_6030     BIT(2)          /* secondary processor, modem, etc */
 129 #define P2_GRP_6030     BIT(1)          /* "peripherals" */
 130 #define P1_GRP_6030     BIT(0)          /* CPU/Linux */
 131
 132 static int twl4030reg_is_enabled(struct regulator_dev *rdev)
 133 {
 134         int     state = twlreg_grp(rdev);
 135
 136         if (state < 0)
 137                 return state;
 138
 139         return state & P1_GRP_4030;
 140 }
 141
 142 static int twl6030reg_is_enabled(struct regulator_dev *rdev)
 143 {
 144         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 145         int                     grp, val;
 146
 147         grp = twlreg_read(info, TWL_MODULE_PM_RECEIVER, VREG_GRP);
 148         if (grp < 0)
 149                 return grp;
 150
 151         grp &= P1_GRP_6030;
 152
 153         val = twlreg_read(info, TWL_MODULE_PM_RECEIVER, VREG_STATE);
 154         val = TWL6030_CFG_STATE_APP(val);
 155
 156         return grp && (val == TWL6030_CFG_STATE_ON);
 157 }
 158
 159 static int twlreg_enable(struct regulator_dev *rdev)
 160 {
 161         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 162         int                     grp;
 163         int                     ret;
 164
 165         grp = twlreg_read(info, TWL_MODULE_PM_RECEIVER, VREG_GRP);
 166         if (grp < 0)
 167                 return grp;
 168
 169         if (twl_class_is_4030())
 170                 grp |= P1_GRP_4030;
 171         else
 172                 grp |= P1_GRP_6030;
 173
 174         ret = twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_GRP, grp);
 175
 176         if (!ret && twl_class_is_6030())
 177                 ret = twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_STATE,
 178                                 grp << TWL6030_CFG_STATE_GRP_SHIFT |
 179                                 TWL6030_CFG_STATE_ON);
 180
 181         udelay(info->delay);
 182
 183         return ret;
 184 }
 185
 186 static int twlreg_disable(struct regulator_dev *rdev)
 187 {
 188         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 189         int                     grp;
 190         int                     ret;
 191
 192         grp = twlreg_read(info, TWL_MODULE_PM_RECEIVER, VREG_GRP);
 193         if (grp < 0)
 194                 return grp;
 195
 196         /* For 6030, set the off state for all grps enabled */
 197         if (twl_class_is_6030()) {
 198                 ret = twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_STATE,
 199                         (grp & (P1_GRP_6030 | P2_GRP_6030 | P3_GRP_6030)) <<
 200                                 TWL6030_CFG_STATE_GRP_SHIFT |
 201                         TWL6030_CFG_STATE_OFF);
 202                 if (ret)
 203                         return ret;
 204         }
 205
 206         if (twl_class_is_4030())
 207                 grp &= ~(P1_GRP_4030 | P2_GRP_4030 | P3_GRP_4030);
 208         else
 209                 grp &= ~(P1_GRP_6030 | P2_GRP_6030 | P3_GRP_6030);
 210
 211         ret = twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_GRP, grp);
 212
 213         /* Next, associate cleared grp in state register */
 214         if (!ret && twl_class_is_6030())
 215                 ret = twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_STATE,
 216                                 grp << TWL6030_CFG_STATE_GRP_SHIFT |
 217                                 TWL6030_CFG_STATE_OFF);
 218
 219         return ret;
 220 }
 221
 222 static int twl4030reg_get_status(struct regulator_dev *rdev)
 223 {
 224         int     state = twlreg_grp(rdev);
 225
 226         if (state < 0)
 227                 return state;
 228         state &= 0x0f;
 229
 230         /* assume state != WARM_RESET; we'd not be running...  */
 231         if (!state)
 232                 return REGULATOR_STATUS_OFF;
 233         return (state & BIT(3))
 234                 ? REGULATOR_STATUS_NORMAL
 235                 : REGULATOR_STATUS_STANDBY;
 236 }
 237
 238 static int twl6030reg_get_status(struct regulator_dev *rdev)
 239 {
 240         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 241         int                     val;
 242
 243         val = twlreg_grp(rdev);
 244         if (val < 0)
 245                 return val;
 246
 247         val = twlreg_read(info, TWL_MODULE_PM_RECEIVER, VREG_STATE);
 248
 249         switch (TWL6030_CFG_STATE_APP(val)) {
 250         case TWL6030_CFG_STATE_ON:
 251                 return REGULATOR_STATUS_NORMAL;
 252
 253         case TWL6030_CFG_STATE_SLEEP:
 254                 return REGULATOR_STATUS_STANDBY;
 255
 256         case TWL6030_CFG_STATE_OFF:
 257         case TWL6030_CFG_STATE_OFF2:
 258         default:
 259                 break;
 260         }
 261
 262         return REGULATOR_STATUS_OFF;
 263 }
 264
 265 static int twl4030reg_set_mode(struct regulator_dev *rdev, unsigned mode)
 266 {
 267         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 268         unsigned                message;
 269         int                     status;
 270
 271         /* We can only set the mode through state machine commands... */
 272         switch (mode) {
 273         case REGULATOR_MODE_NORMAL:
 274                 message = MSG_SINGULAR(DEV_GRP_P1, info->id, RES_STATE_ACTIVE);
 275                 break;
 276         case REGULATOR_MODE_STANDBY:
 277                 message = MSG_SINGULAR(DEV_GRP_P1, info->id, RES_STATE_SLEEP);
 278                 break;
 279         default:
 280                 return -EINVAL;
 281         }
 282
 283         /* Ensure the resource is associated with some group */
 284         status = twlreg_grp(rdev);
 285         if (status < 0)
 286                 return status;
 287         if (!(status & (P3_GRP_4030 | P2_GRP_4030 | P1_GRP_4030)))
 288                 return -EACCES;
 289
 290         status = twl_i2c_write_u8(TWL_MODULE_PM_MASTER,
 291                         message >> 8, TWL4030_PM_MASTER_PB_WORD_MSB);
 292         if (status < 0)
 293                 return status;
 294
 295         return twl_i2c_write_u8(TWL_MODULE_PM_MASTER,
 296                         message & 0xff, TWL4030_PM_MASTER_PB_WORD_LSB);
 297 }
 298
 299 static int twl6030reg_set_mode(struct regulator_dev *rdev, unsigned mode)
 300 {
 301         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 302         int grp;
 303         int val;
 304
 305         grp = twlreg_read(info, TWL_MODULE_PM_RECEIVER, VREG_GRP);
 306
 307         if (grp < 0)
 308                 return grp;
 309
 310         /* Compose the state register settings */
 311         val = grp << TWL6030_CFG_STATE_GRP_SHIFT;
 312         /* We can only set the mode through state machine commands... */
 313         switch (mode) {
 314         case REGULATOR_MODE_NORMAL:
 315                 val |= TWL6030_CFG_STATE_ON;
 316                 break;
 317         case REGULATOR_MODE_STANDBY:
 318                 val |= TWL6030_CFG_STATE_SLEEP;
 319                 break;
 320
 321         default:
 322                 return -EINVAL;
 323         }
 324
 325         return twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_STATE, val);
 326 }
 327
 328 /*----------------------------------------------------------------------*/
 329
 330 /*
 331  * Support for adjustable-voltage LDOs uses a four bit (or less) voltage
 332  * select field in its control register.   We use tables indexed by VSEL
 333  * to record voltages in milliVolts.  (Accuracy is about three percent.)
 334  *
 335  * Note that VSEL values for VAUX2 changed in twl5030 and newer silicon;
 336  * currently handled by listing two slightly different VAUX2 regulators,
 337  * only one of which will be configured.
 338  *
 339  * VSEL values documented as "TI cannot support these values" are flagged
 340  * in these tables as UNSUP() values; we normally won't assign them.
 341  *
 342  * VAUX3 at 3V is incorrectly listed in some TI manuals as unsupported.
 343  * TI are revising the twl5030/tps659x0 specs to support that 3.0V setting.
 344  */
 345 #ifdef CONFIG_TWL4030_ALLOW_UNSUPPORTED
 346 #define UNSUP_MASK      0x0000
 347 #else
 348 #define UNSUP_MASK      0x8000
 349 #endif
 350
 351 #define UNSUP(x)        (UNSUP_MASK | (x))
 352 #define IS_UNSUP(x)     (UNSUP_MASK & (x))
 353 #define LDO_MV(x)       (~UNSUP_MASK & (x))
 354
 355
 356 static const u16 VAUX1_VSEL_table[] = {
 357         UNSUP(1500), UNSUP(1800), 2500, 2800,
 358         3000, 3000, 3000, 3000,
 359 };
 360 static const u16 VAUX2_4030_VSEL_table[] = {
 361         UNSUP(1000), UNSUP(1000), UNSUP(1200), 1300,
 362         1500, 1800, UNSUP(1850), 2500,
 363         UNSUP(2600), 2800, UNSUP(2850), UNSUP(3000),
 364         UNSUP(3150), UNSUP(3150), UNSUP(3150), UNSUP(3150),
 365 };
 366 static const u16 VAUX2_VSEL_table[] = {
 367         1700, 1700, 1900, 1300,
 368         1500, 1800, 2000, 2500,
 369         2100, 2800, 2200, 2300,
 370         2400, 2400, 2400, 2400,
 371 };
 372 static const u16 VAUX3_VSEL_table[] = {
 373         1500, 1800, 2500, 2800,
 374         3000, 3000, 3000, 3000,
 375 };
 376 static const u16 VAUX4_VSEL_table[] = {
 377         700, 1000, 1200, UNSUP(1300),
 378         1500, 1800, UNSUP(1850), 2500,
 379         UNSUP(2600), 2800, UNSUP(2850), UNSUP(3000),
 380         UNSUP(3150), UNSUP(3150), UNSUP(3150), UNSUP(3150),
 381 };
 382 static const u16 VMMC1_VSEL_table[] = {
 383         1850, 2850, 3000, 3150,
 384 };
 385 static const u16 VMMC2_VSEL_table[] = {
 386         UNSUP(1000), UNSUP(1000), UNSUP(1200), UNSUP(1300),
 387         UNSUP(1500), UNSUP(1800), 1850, UNSUP(2500),
 388         2600, 2800, 2850, 3000,
 389         3150, 3150, 3150, 3150,
 390 };
 391 static const u16 VPLL1_VSEL_table[] = {
 392         1000, 1200, 1300, 1800,
 393         UNSUP(2800), UNSUP(3000), UNSUP(3000), UNSUP(3000),
 394 };
 395 static const u16 VPLL2_VSEL_table[] = {
 396         700, 1000, 1200, 1300,
 397         UNSUP(1500), 1800, UNSUP(1850), UNSUP(2500),
 398         UNSUP(2600), UNSUP(2800), UNSUP(2850), UNSUP(3000),
 399         UNSUP(3150), UNSUP(3150), UNSUP(3150), UNSUP(3150),
 400 };
 401 static const u16 VSIM_VSEL_table[] = {
 402         UNSUP(1000), UNSUP(1200), UNSUP(1300), 1800,
 403         2800, 3000, 3000, 3000,
 404 };
 405 static const u16 VDAC_VSEL_table[] = {
 406         1200, 1300, 1800, 1800,
 407 };
 408 static const u16 VDD1_VSEL_table[] = {
 409         800, 1450,
 410 };
 411 static const u16 VDD2_VSEL_table[] = {
 412         800, 1450, 1500,
 413 };
 414 static const u16 VIO_VSEL_table[] = {
 415         1800, 1850,
 416 };
 417 static const u16 VINTANA2_VSEL_table[] = {
 418         2500, 2750,
 419 };
 420
 421 static int twl4030ldo_list_voltage(struct regulator_dev *rdev, unsigned index)
 422 {
 423         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 424         int                     mV = info->table[index];
 425
 426         return IS_UNSUP(mV) ? 0 : (LDO_MV(mV) * 1000);
 427 }
 428
 429 static int
 430 twl4030ldo_set_voltage(struct regulator_dev *rdev, int min_uV, int max_uV,
 431                        unsigned *selector)
 432 {
 433         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 434         int                     vsel;
 435
 436         for (vsel = 0; vsel < info->table_len; vsel++) {
 437                 int mV = info->table[vsel];
 438                 int uV;
 439
 440                 if (IS_UNSUP(mV))
 441                         continue;
 442                 uV = LDO_MV(mV) * 1000;
 443
 444                 /* REVISIT for VAUX2, first match may not be best/lowest */
 445
 446                 /* use the first in-range value */
 447                 if (min_uV <= uV && uV <= max_uV) {
 448                         *selector = vsel;
 449                         return twlreg_write(info, TWL_MODULE_PM_RECEIVER,
 450                                                         VREG_VOLTAGE, vsel);
 451                 }
 452         }
 453
 454         return -EDOM;
 455 }
 456
 457 static int twl4030ldo_get_voltage(struct regulator_dev *rdev)
 458 {
 459         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 460         int             vsel = twlreg_read(info, TWL_MODULE_PM_RECEIVER,
 461                                                                 VREG_VOLTAGE);
 462
 463         if (vsel < 0)
 464                 return vsel;
 465
 466         vsel &= info->table_len - 1;
 467         return LDO_MV(info->table[vsel]) * 1000;
 468 }
 469
 470 static struct regulator_ops twl4030ldo_ops = {
 471         .list_voltage   = twl4030ldo_list_voltage,
 472
 473         .set_voltage    = twl4030ldo_set_voltage,
 474         .get_voltage    = twl4030ldo_get_voltage,
 475
 476         .enable         = twlreg_enable,
 477         .disable        = twlreg_disable,
 478         .is_enabled     = twl4030reg_is_enabled,
 479
 480         .set_mode       = twl4030reg_set_mode,
 481
 482         .get_status     = twl4030reg_get_status,
 483 };
 484
 485 static int twl6030ldo_list_voltage(struct regulator_dev *rdev, unsigned index)
 486 {
 487         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 488
 489         return ((info->min_mV + (index * 100)) * 1000);
 490 }
 491
 492 static int
 493 twl6030ldo_set_voltage(struct regulator_dev *rdev, int min_uV, int max_uV,
 494                        unsigned *selector)
 495 {
 496         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 497         int                     vsel;
 498
 499         if ((min_uV/1000 < info->min_mV) || (max_uV/1000 > info->max_mV))
 500                 return -EDOM;
 501
 502         /*
 503          * Use the below formula to calculate vsel
 504          * mV = 1000mv + 100mv * (vsel - 1)
 505          */
 506         vsel = (min_uV/1000 - 1000)/100 + 1;
 507         *selector = vsel;
 508         return twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_VOLTAGE, vsel);
 509
 510 }
 511
 512 static int twl6030ldo_get_voltage(struct regulator_dev *rdev)
 513 {
 514         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 515         int             vsel = twlreg_read(info, TWL_MODULE_PM_RECEIVER,
 516                                                                 VREG_VOLTAGE);
 517
 518         if (vsel < 0)
 519                 return vsel;
 520
 521         /*
 522          * Use the below formula to calculate vsel
 523          * mV = 1000mv + 100mv * (vsel - 1)
 524          */
 525         return (1000 + (100 * (vsel - 1))) * 1000;
 526 }
 527
 528 static struct regulator_ops twl6030ldo_ops = {
 529         .list_voltage   = twl6030ldo_list_voltage,
 530
 531         .set_voltage    = twl6030ldo_set_voltage,
 532         .get_voltage    = twl6030ldo_get_voltage,
 533
 534         .enable         = twlreg_enable,
 535         .disable        = twlreg_disable,
 536         .is_enabled     = twl6030reg_is_enabled,
 537
 538         .set_mode       = twl6030reg_set_mode,
 539
 540         .get_status     = twl6030reg_get_status,
 541 };
 542
 543 /*----------------------------------------------------------------------*/
 544
 545 /*
 546  * Fixed voltage LDOs don't have a VSEL field to update.
 547  */
 548 static int twlfixed_list_voltage(struct regulator_dev *rdev, unsigned index)
 549 {
 550         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 551
 552         return info->min_mV * 1000;
 553 }
 554
 555 static int twlfixed_get_voltage(struct regulator_dev *rdev)
 556 {
 557         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 558
 559         return info->min_mV * 1000;
 560 }
 561
 562 static struct regulator_ops twl4030fixed_ops = {
 563         .list_voltage   = twlfixed_list_voltage,
 564
 565         .get_voltage    = twlfixed_get_voltage,
 566
 567         .enable         = twlreg_enable,
 568         .disable        = twlreg_disable,
 569         .is_enabled     = twl4030reg_is_enabled,
 570
 571         .set_mode       = twl4030reg_set_mode,
 572
 573         .get_status     = twl4030reg_get_status,
 574 };
 575
 576 static struct regulator_ops twl6030fixed_ops = {
 577         .list_voltage   = twlfixed_list_voltage,
 578
 579         .get_voltage    = twlfixed_get_voltage,
 580
 581         .enable         = twlreg_enable,
 582         .disable        = twlreg_disable,
 583         .is_enabled     = twl6030reg_is_enabled,
 584
 585         .set_mode       = twl6030reg_set_mode,
 586
 587         .get_status     = twl6030reg_get_status,
 588 };
 589
 590 static struct regulator_ops twl6030_fixed_resource = {
 591         .enable         = twlreg_enable,
 592         .disable        = twlreg_disable,
 593         .is_enabled     = twl6030reg_is_enabled,
 594         .get_status     = twl6030reg_get_status,
 595 };
 596
 597 /*----------------------------------------------------------------------*/
 598
 599 #define TWL4030_FIXED_LDO(label, offset, mVolts, num, turnon_delay, \
 600                         remap_conf) \
 601                 TWL_FIXED_LDO(label, offset, mVolts, num, turnon_delay, \
 602                         remap_conf, TWL4030, twl4030fixed_ops)
 603 #define TWL6030_FIXED_LDO(label, offset, mVolts, num, turnon_delay) \
 604                 TWL_FIXED_LDO(label, offset, mVolts, num, turnon_delay, \
 605                         0x0, TWL6030, twl6030fixed_ops)
 606
 607 #define TWL4030_ADJUSTABLE_LDO(label, offset, num, turnon_delay, remap_conf) { \
 608         .base = offset, \
 609         .id = num, \
 610         .table_len = ARRAY_SIZE(label##_VSEL_table), \
 611         .table = label##_VSEL_table, \
 612         .delay = turnon_delay, \
 613         .remap = remap_conf, \
 614         .desc = { \
 615                 .name = #label, \
 616                 .id = TWL4030_REG_##label, \
 617                 .n_voltages = ARRAY_SIZE(label##_VSEL_table), \
 618                 .ops = &twl4030ldo_ops, \
 619                 .type = REGULATOR_VOLTAGE, \
 620                 .owner = THIS_MODULE, \
 621                 }, \
 622         }
 623
 624 #define TWL6030_ADJUSTABLE_LDO(label, offset, min_mVolts, max_mVolts, num) { \
 625         .base = offset, \
 626         .id = num, \
 627         .min_mV = min_mVolts, \
 628         .max_mV = max_mVolts, \
 629         .desc = { \
 630                 .name = #label, \
 631                 .id = TWL6030_REG_##label, \
 632                 .n_voltages = (max_mVolts - min_mVolts)/100, \
 633                 .ops = &twl6030ldo_ops, \
 634                 .type = REGULATOR_VOLTAGE, \
 635                 .owner = THIS_MODULE, \
 636                 }, \
 637         }
 638
 639
 640 #define TWL_FIXED_LDO(label, offset, mVolts, num, turnon_delay, remap_conf, \
 641                 family, operations) { \
 642         .base = offset, \
 643         .id = num, \
 644         .min_mV = mVolts, \
 645         .delay = turnon_delay, \
 646         .remap = remap_conf, \
 647         .desc = { \
 648                 .name = #label, \
 649                 .id = family##_REG_##label, \
 650                 .n_voltages = 1, \
 651                 .ops = &operations, \
 652                 .type = REGULATOR_VOLTAGE, \
 653                 .owner = THIS_MODULE, \
 654                 }, \
 655         }
 656
 657 #define TWL6030_FIXED_RESOURCE(label, offset, num, turnon_delay) { \
 658         .base = offset, \
 659         .id = num, \
 660         .delay = turnon_delay, \
 661         .desc = { \
 662                 .name = #label, \
 663                 .id = TWL6030_REG_##label, \
 664                 .ops = &twl6030_fixed_resource, \
 665                 .type = REGULATOR_VOLTAGE, \
 666                 .owner = THIS_MODULE, \
 667                 }, \
 668         }
 669
 670 /*
 671  * We list regulators here if systems need some level of
 672  * software control over them after boot.
 673  */
 674 static struct twlreg_info twl_regs[] = {
 675         TWL4030_ADJUSTABLE_LDO(VAUX1, 0x17, 1, 100, 0x08),
 676         TWL4030_ADJUSTABLE_LDO(VAUX2_4030, 0x1b, 2, 100, 0x08),
 677         TWL4030_ADJUSTABLE_LDO(VAUX2, 0x1b, 2, 100, 0x08),
 678         TWL4030_ADJUSTABLE_LDO(VAUX3, 0x1f, 3, 100, 0x08),
 679         TWL4030_ADJUSTABLE_LDO(VAUX4, 0x23, 4, 100, 0x08),
 680         TWL4030_ADJUSTABLE_LDO(VMMC1, 0x27, 5, 100, 0x08),
 681         TWL4030_ADJUSTABLE_LDO(VMMC2, 0x2b, 6, 100, 0x08),
 682         TWL4030_ADJUSTABLE_LDO(VPLL1, 0x2f, 7, 100, 0x00),
 683         TWL4030_ADJUSTABLE_LDO(VPLL2, 0x33, 8, 100, 0x08),
 684         TWL4030_ADJUSTABLE_LDO(VSIM, 0x37, 9, 100, 0x00),
 685         TWL4030_ADJUSTABLE_LDO(VDAC, 0x3b, 10, 100, 0x08),
 686         TWL4030_FIXED_LDO(VINTANA1, 0x3f, 1500, 11, 100, 0x08),
 687         TWL4030_ADJUSTABLE_LDO(VINTANA2, 0x43, 12, 100, 0x08),
 688         TWL4030_FIXED_LDO(VINTDIG, 0x47, 1500, 13, 100, 0x08),
 689         TWL4030_ADJUSTABLE_LDO(VIO, 0x4b, 14, 1000, 0x08),
 690         TWL4030_ADJUSTABLE_LDO(VDD1, 0x55, 15, 1000, 0x08),
 691         TWL4030_ADJUSTABLE_LDO(VDD2, 0x63, 16, 1000, 0x08),
 692         TWL4030_FIXED_LDO(VUSB1V5, 0x71, 1500, 17, 100, 0x08),
 693         TWL4030_FIXED_LDO(VUSB1V8, 0x74, 1800, 18, 100, 0x08),
 694         TWL4030_FIXED_LDO(VUSB3V1, 0x77, 3100, 19, 150, 0x08),
 695         /* VUSBCP is managed *only* by the USB subchip */
 696
 697         /* 6030 REG with base as PMC Slave Misc : 0x0030 */
 698         /* Turnon-delay and remap configuration values for 6030 are not
 699            verified since the specification is not public */
 700         TWL6030_ADJUSTABLE_LDO(VAUX1_6030, 0x54, 1000, 3300, 1),
 701         TWL6030_ADJUSTABLE_LDO(VAUX2_6030, 0x58, 1000, 3300, 2),
 702         TWL6030_ADJUSTABLE_LDO(VAUX3_6030, 0x5c, 1000, 3300, 3),
 703         TWL6030_ADJUSTABLE_LDO(VMMC, 0x68, 1000, 3300, 4),
 704         TWL6030_ADJUSTABLE_LDO(VPP, 0x6c, 1000, 3300, 5),
 705         TWL6030_ADJUSTABLE_LDO(VUSIM, 0x74, 1000, 3300, 7),
 706         TWL6030_FIXED_LDO(VANA, 0x50, 2100, 15, 0),
 707         TWL6030_FIXED_LDO(VCXIO, 0x60, 1800, 16, 0),
 708         TWL6030_FIXED_LDO(VDAC, 0x64, 1800, 17, 0),
 709         TWL6030_FIXED_LDO(VUSB, 0x70, 3300, 18, 0),
 710         TWL6030_FIXED_RESOURCE(CLK32KG, 0x8C, 48, 0),
 711 };
 712
 713 static int __devinit twlreg_probe(struct platform_device *pdev)
 714 {
 715         int                             i;
 716         struct twlreg_info              *info;
 717         struct regulator_init_data      *initdata;
 718         struct regulation_constraints   *c;
 719         struct regulator_dev            *rdev;
 720
 721         for (i = 0, info = NULL; i < ARRAY_SIZE(twl_regs); i++) {
 722                 if (twl_regs[i].desc.id != pdev->id)
 723                         continue;
 724                 info = twl_regs + i;
 725                 break;
 726         }
 727         if (!info)
 728                 return -ENODEV;
 729
 730         initdata = pdev->dev.platform_data;
 731         if (!initdata)
 732                 return -EINVAL;
 733
 734         /* Constrain board-specific capabilities according to what
 735          * this driver and the chip itself can actually do.
 736          */
 737         c = &initdata->constraints;
 738         c->valid_modes_mask &= REGULATOR_MODE_NORMAL | REGULATOR_MODE_STANDBY;
 739         c->valid_ops_mask &= REGULATOR_CHANGE_VOLTAGE
 740                                 | REGULATOR_CHANGE_MODE
 741                                 | REGULATOR_CHANGE_STATUS;
 742         switch (pdev->id) {
 743         case TWL4030_REG_VIO:
 744         case TWL4030_REG_VDD1:
 745         case TWL4030_REG_VDD2:
 746         case TWL4030_REG_VPLL1:
 747         case TWL4030_REG_VINTANA1:
 748         case TWL4030_REG_VINTANA2:
 749         case TWL4030_REG_VINTDIG:
 750                 c->always_on = true;
 751                 break;
 752         default:
 753                 break;
 754         }
 755
 756         rdev = regulator_register(&info->desc, &pdev->dev, initdata, info);
 757         if (IS_ERR(rdev)) {
 758                 dev_err(&pdev->dev, "can't register %s, %ld\n",
 759                                 info->desc.name, PTR_ERR(rdev));
 760                 return PTR_ERR(rdev);
 761         }
 762         platform_set_drvdata(pdev, rdev);
 763
 764         if (twl_class_is_4030())
 765                 twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_REMAP,
 766                                                 info->remap);
 767
 768         /* NOTE:  many regulators support short-circuit IRQs (presentable
 769          * as REGULATOR_OVER_CURRENT notifications?) configured via:
 770          *  - SC_CONFIG
 771          *  - SC_DETECT1 (vintana2, vmmc1/2, vaux1/2/3/4)
 772          *  - SC_DETECT2 (vusb, vdac, vio, vdd1/2, vpll2)
 773          *  - IT_CONFIG
 774          */
 775
 776         return 0;
 777 }
 778
 779 static int __devexit twlreg_remove(struct platform_device *pdev)
 780 {
 781         regulator_unregister(platform_get_drvdata(pdev));
 782         return 0;
 783 }
 784
 785 MODULE_ALIAS("platform:twl_reg");
 786
 787 static struct platform_driver twlreg_driver = {
 788         .probe          = twlreg_probe,
 789         .remove         = __devexit_p(twlreg_remove),
 790         /* NOTE: short name, to work around driver model truncation of
 791          * "twl_regulator.12" (and friends) to "twl_regulator.1".
 792          */
 793         .driver.name    = "twl_reg",
 794         .driver.owner   = THIS_MODULE,
 795 };
 796
 797 static int __init twlreg_init(void)
 798 {
 799         return platform_driver_register(&twlreg_driver);
 800 }
 801 subsys_initcall(twlreg_init);
 802
 803 static void __exit twlreg_exit(void)
 804 {
 805         platform_driver_unregister(&twlreg_driver);
 806 }
 807 module_exit(twlreg_exit)
 808
 809 MODULE_DESCRIPTION("TWL regulator driver");
 810 MODULE_LICENSE("GPL");