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 twl4030reg_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         grp |= P1_GRP_4030;
 170
 171         ret = twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_GRP, grp);
 172
 173         udelay(info->delay);
 174
 175         return ret;
 176 }
 177
 178 static int twl6030reg_enable(struct regulator_dev *rdev)
 179 {
 180         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 181         int                     grp;
 182         int                     ret;
 183
 184         grp = twlreg_read(info, TWL_MODULE_PM_RECEIVER, VREG_GRP);
 185         if (grp < 0)
 186                 return grp;
 187
 188         ret = twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_STATE,
 189                         grp << TWL6030_CFG_STATE_GRP_SHIFT |
 190                         TWL6030_CFG_STATE_ON);
 191
 192         udelay(info->delay);
 193
 194         return ret;
 195 }
 196
 197 static int twlreg_disable(struct regulator_dev *rdev)
 198 {
 199         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 200         int                     grp;
 201         int                     ret;
 202
 203         grp = twlreg_read(info, TWL_MODULE_PM_RECEIVER, VREG_GRP);
 204         if (grp < 0)
 205                 return grp;
 206
 207         /* For 6030, set the off state for all grps enabled */
 208         if (twl_class_is_6030()) {
 209                 ret = twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_STATE,
 210                         (grp & (P1_GRP_6030 | P2_GRP_6030 | P3_GRP_6030)) <<
 211                                 TWL6030_CFG_STATE_GRP_SHIFT |
 212                         TWL6030_CFG_STATE_OFF);
 213                 if (ret)
 214                         return ret;
 215         }
 216
 217         if (twl_class_is_4030())
 218                 grp &= ~(P1_GRP_4030 | P2_GRP_4030 | P3_GRP_4030);
 219         else
 220                 grp &= ~(P1_GRP_6030 | P2_GRP_6030 | P3_GRP_6030);
 221
 222         ret = twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_GRP, grp);
 223
 224         /* Next, associate cleared grp in state register */
 225         if (!ret && twl_class_is_6030())
 226                 ret = twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_STATE,
 227                                 grp << TWL6030_CFG_STATE_GRP_SHIFT |
 228                                 TWL6030_CFG_STATE_OFF);
 229
 230         return ret;
 231 }
 232
 233 static int twl4030reg_get_status(struct regulator_dev *rdev)
 234 {
 235         int     state = twlreg_grp(rdev);
 236
 237         if (state < 0)
 238                 return state;
 239         state &= 0x0f;
 240
 241         /* assume state != WARM_RESET; we'd not be running...  */
 242         if (!state)
 243                 return REGULATOR_STATUS_OFF;
 244         return (state & BIT(3))
 245                 ? REGULATOR_STATUS_NORMAL
 246                 : REGULATOR_STATUS_STANDBY;
 247 }
 248
 249 static int twl6030reg_get_status(struct regulator_dev *rdev)
 250 {
 251         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 252         int                     val;
 253
 254         val = twlreg_grp(rdev);
 255         if (val < 0)
 256                 return val;
 257
 258         val = twlreg_read(info, TWL_MODULE_PM_RECEIVER, VREG_STATE);
 259
 260         switch (TWL6030_CFG_STATE_APP(val)) {
 261         case TWL6030_CFG_STATE_ON:
 262                 return REGULATOR_STATUS_NORMAL;
 263
 264         case TWL6030_CFG_STATE_SLEEP:
 265                 return REGULATOR_STATUS_STANDBY;
 266
 267         case TWL6030_CFG_STATE_OFF:
 268         case TWL6030_CFG_STATE_OFF2:
 269         default:
 270                 break;
 271         }
 272
 273         return REGULATOR_STATUS_OFF;
 274 }
 275
 276 static int twl4030reg_set_mode(struct regulator_dev *rdev, unsigned mode)
 277 {
 278         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 279         unsigned                message;
 280         int                     status;
 281
 282         /* We can only set the mode through state machine commands... */
 283         switch (mode) {
 284         case REGULATOR_MODE_NORMAL:
 285                 message = MSG_SINGULAR(DEV_GRP_P1, info->id, RES_STATE_ACTIVE);
 286                 break;
 287         case REGULATOR_MODE_STANDBY:
 288                 message = MSG_SINGULAR(DEV_GRP_P1, info->id, RES_STATE_SLEEP);
 289                 break;
 290         default:
 291                 return -EINVAL;
 292         }
 293
 294         /* Ensure the resource is associated with some group */
 295         status = twlreg_grp(rdev);
 296         if (status < 0)
 297                 return status;
 298         if (!(status & (P3_GRP_4030 | P2_GRP_4030 | P1_GRP_4030)))
 299                 return -EACCES;
 300
 301         status = twl_i2c_write_u8(TWL_MODULE_PM_MASTER,
 302                         message >> 8, TWL4030_PM_MASTER_PB_WORD_MSB);
 303         if (status < 0)
 304                 return status;
 305
 306         return twl_i2c_write_u8(TWL_MODULE_PM_MASTER,
 307                         message & 0xff, TWL4030_PM_MASTER_PB_WORD_LSB);
 308 }
 309
 310 static int twl6030reg_set_mode(struct regulator_dev *rdev, unsigned mode)
 311 {
 312         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 313         int grp;
 314         int val;
 315
 316         grp = twlreg_read(info, TWL_MODULE_PM_RECEIVER, VREG_GRP);
 317
 318         if (grp < 0)
 319                 return grp;
 320
 321         /* Compose the state register settings */
 322         val = grp << TWL6030_CFG_STATE_GRP_SHIFT;
 323         /* We can only set the mode through state machine commands... */
 324         switch (mode) {
 325         case REGULATOR_MODE_NORMAL:
 326                 val |= TWL6030_CFG_STATE_ON;
 327                 break;
 328         case REGULATOR_MODE_STANDBY:
 329                 val |= TWL6030_CFG_STATE_SLEEP;
 330                 break;
 331
 332         default:
 333                 return -EINVAL;
 334         }
 335
 336         return twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_STATE, val);
 337 }
 338
 339 /*----------------------------------------------------------------------*/
 340
 341 /*
 342  * Support for adjustable-voltage LDOs uses a four bit (or less) voltage
 343  * select field in its control register.   We use tables indexed by VSEL
 344  * to record voltages in milliVolts.  (Accuracy is about three percent.)
 345  *
 346  * Note that VSEL values for VAUX2 changed in twl5030 and newer silicon;
 347  * currently handled by listing two slightly different VAUX2 regulators,
 348  * only one of which will be configured.
 349  *
 350  * VSEL values documented as "TI cannot support these values" are flagged
 351  * in these tables as UNSUP() values; we normally won't assign them.
 352  *
 353  * VAUX3 at 3V is incorrectly listed in some TI manuals as unsupported.
 354  * TI are revising the twl5030/tps659x0 specs to support that 3.0V setting.
 355  */
 356 #ifdef CONFIG_TWL4030_ALLOW_UNSUPPORTED
 357 #define UNSUP_MASK      0x0000
 358 #else
 359 #define UNSUP_MASK      0x8000
 360 #endif
 361
 362 #define UNSUP(x)        (UNSUP_MASK | (x))
 363 #define IS_UNSUP(x)     (UNSUP_MASK & (x))
 364 #define LDO_MV(x)       (~UNSUP_MASK & (x))
 365
 366
 367 static const u16 VAUX1_VSEL_table[] = {
 368         UNSUP(1500), UNSUP(1800), 2500, 2800,
 369         3000, 3000, 3000, 3000,
 370 };
 371 static const u16 VAUX2_4030_VSEL_table[] = {
 372         UNSUP(1000), UNSUP(1000), UNSUP(1200), 1300,
 373         1500, 1800, UNSUP(1850), 2500,
 374         UNSUP(2600), 2800, UNSUP(2850), UNSUP(3000),
 375         UNSUP(3150), UNSUP(3150), UNSUP(3150), UNSUP(3150),
 376 };
 377 static const u16 VAUX2_VSEL_table[] = {
 378         1700, 1700, 1900, 1300,
 379         1500, 1800, 2000, 2500,
 380         2100, 2800, 2200, 2300,
 381         2400, 2400, 2400, 2400,
 382 };
 383 static const u16 VAUX3_VSEL_table[] = {
 384         1500, 1800, 2500, 2800,
 385         3000, 3000, 3000, 3000,
 386 };
 387 static const u16 VAUX4_VSEL_table[] = {
 388         700, 1000, 1200, UNSUP(1300),
 389         1500, 1800, UNSUP(1850), 2500,
 390         UNSUP(2600), 2800, UNSUP(2850), UNSUP(3000),
 391         UNSUP(3150), UNSUP(3150), UNSUP(3150), UNSUP(3150),
 392 };
 393 static const u16 VMMC1_VSEL_table[] = {
 394         1850, 2850, 3000, 3150,
 395 };
 396 static const u16 VMMC2_VSEL_table[] = {
 397         UNSUP(1000), UNSUP(1000), UNSUP(1200), UNSUP(1300),
 398         UNSUP(1500), UNSUP(1800), 1850, UNSUP(2500),
 399         2600, 2800, 2850, 3000,
 400         3150, 3150, 3150, 3150,
 401 };
 402 static const u16 VPLL1_VSEL_table[] = {
 403         1000, 1200, 1300, 1800,
 404         UNSUP(2800), UNSUP(3000), UNSUP(3000), UNSUP(3000),
 405 };
 406 static const u16 VPLL2_VSEL_table[] = {
 407         700, 1000, 1200, 1300,
 408         UNSUP(1500), 1800, UNSUP(1850), UNSUP(2500),
 409         UNSUP(2600), UNSUP(2800), UNSUP(2850), UNSUP(3000),
 410         UNSUP(3150), UNSUP(3150), UNSUP(3150), UNSUP(3150),
 411 };
 412 static const u16 VSIM_VSEL_table[] = {
 413         UNSUP(1000), UNSUP(1200), UNSUP(1300), 1800,
 414         2800, 3000, 3000, 3000,
 415 };
 416 static const u16 VDAC_VSEL_table[] = {
 417         1200, 1300, 1800, 1800,
 418 };
 419 static const u16 VDD1_VSEL_table[] = {
 420         800, 1450,
 421 };
 422 static const u16 VDD2_VSEL_table[] = {
 423         800, 1450, 1500,
 424 };
 425 static const u16 VIO_VSEL_table[] = {
 426         1800, 1850,
 427 };
 428 static const u16 VINTANA2_VSEL_table[] = {
 429         2500, 2750,
 430 };
 431
 432 static int twl4030ldo_list_voltage(struct regulator_dev *rdev, unsigned index)
 433 {
 434         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 435         int                     mV = info->table[index];
 436
 437         return IS_UNSUP(mV) ? 0 : (LDO_MV(mV) * 1000);
 438 }
 439
 440 static int
 441 twl4030ldo_set_voltage(struct regulator_dev *rdev, int min_uV, int max_uV,
 442                        unsigned *selector)
 443 {
 444         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 445         int                     vsel;
 446
 447         for (vsel = 0; vsel < info->table_len; vsel++) {
 448                 int mV = info->table[vsel];
 449                 int uV;
 450
 451                 if (IS_UNSUP(mV))
 452                         continue;
 453                 uV = LDO_MV(mV) * 1000;
 454
 455                 /* REVISIT for VAUX2, first match may not be best/lowest */
 456
 457                 /* use the first in-range value */
 458                 if (min_uV <= uV && uV <= max_uV) {
 459                         *selector = vsel;
 460                         return twlreg_write(info, TWL_MODULE_PM_RECEIVER,
 461                                                         VREG_VOLTAGE, vsel);
 462                 }
 463         }
 464
 465         return -EDOM;
 466 }
 467
 468 static int twl4030ldo_get_voltage(struct regulator_dev *rdev)
 469 {
 470         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 471         int             vsel = twlreg_read(info, TWL_MODULE_PM_RECEIVER,
 472                                                                 VREG_VOLTAGE);
 473
 474         if (vsel < 0)
 475                 return vsel;
 476
 477         vsel &= info->table_len - 1;
 478         return LDO_MV(info->table[vsel]) * 1000;
 479 }
 480
 481 static struct regulator_ops twl4030ldo_ops = {
 482         .list_voltage   = twl4030ldo_list_voltage,
 483
 484         .set_voltage    = twl4030ldo_set_voltage,
 485         .get_voltage    = twl4030ldo_get_voltage,
 486
 487         .enable         = twl4030reg_enable,
 488         .disable        = twlreg_disable,
 489         .is_enabled     = twl4030reg_is_enabled,
 490
 491         .set_mode       = twl4030reg_set_mode,
 492
 493         .get_status     = twl4030reg_get_status,
 494 };
 495
 496 static int twl6030ldo_list_voltage(struct regulator_dev *rdev, unsigned index)
 497 {
 498         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 499
 500         return ((info->min_mV + (index * 100)) * 1000);
 501 }
 502
 503 static int
 504 twl6030ldo_set_voltage(struct regulator_dev *rdev, int min_uV, int max_uV,
 505                        unsigned *selector)
 506 {
 507         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 508         int                     vsel;
 509
 510         if ((min_uV/1000 < info->min_mV) || (max_uV/1000 > info->max_mV))
 511                 return -EDOM;
 512
 513         /*
 514          * Use the below formula to calculate vsel
 515          * mV = 1000mv + 100mv * (vsel - 1)
 516          */
 517         vsel = (min_uV/1000 - 1000)/100 + 1;
 518         *selector = vsel;
 519         return twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_VOLTAGE, vsel);
 520
 521 }
 522
 523 static int twl6030ldo_get_voltage(struct regulator_dev *rdev)
 524 {
 525         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 526         int             vsel = twlreg_read(info, TWL_MODULE_PM_RECEIVER,
 527                                                                 VREG_VOLTAGE);
 528
 529         if (vsel < 0)
 530                 return vsel;
 531
 532         /*
 533          * Use the below formula to calculate vsel
 534          * mV = 1000mv + 100mv * (vsel - 1)
 535          */
 536         return (1000 + (100 * (vsel - 1))) * 1000;
 537 }
 538
 539 static struct regulator_ops twl6030ldo_ops = {
 540         .list_voltage   = twl6030ldo_list_voltage,
 541
 542         .set_voltage    = twl6030ldo_set_voltage,
 543         .get_voltage    = twl6030ldo_get_voltage,
 544
 545         .enable         = twl6030reg_enable,
 546         .disable        = twlreg_disable,
 547         .is_enabled     = twl6030reg_is_enabled,
 548
 549         .set_mode       = twl6030reg_set_mode,
 550
 551         .get_status     = twl6030reg_get_status,
 552 };
 553
 554 /*----------------------------------------------------------------------*/
 555
 556 /*
 557  * Fixed voltage LDOs don't have a VSEL field to update.
 558  */
 559 static int twlfixed_list_voltage(struct regulator_dev *rdev, unsigned index)
 560 {
 561         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 562
 563         return info->min_mV * 1000;
 564 }
 565
 566 static int twlfixed_get_voltage(struct regulator_dev *rdev)
 567 {
 568         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 569
 570         return info->min_mV * 1000;
 571 }
 572
 573 static struct regulator_ops twl4030fixed_ops = {
 574         .list_voltage   = twlfixed_list_voltage,
 575
 576         .get_voltage    = twlfixed_get_voltage,
 577
 578         .enable         = twl4030reg_enable,
 579         .disable        = twlreg_disable,
 580         .is_enabled     = twl4030reg_is_enabled,
 581
 582         .set_mode       = twl4030reg_set_mode,
 583
 584         .get_status     = twl4030reg_get_status,
 585 };
 586
 587 static struct regulator_ops twl6030fixed_ops = {
 588         .list_voltage   = twlfixed_list_voltage,
 589
 590         .get_voltage    = twlfixed_get_voltage,
 591
 592         .enable         = twl6030reg_enable,
 593         .disable        = twlreg_disable,
 594         .is_enabled     = twl6030reg_is_enabled,
 595
 596         .set_mode       = twl6030reg_set_mode,
 597
 598         .get_status     = twl6030reg_get_status,
 599 };
 600
 601 static struct regulator_ops twl6030_fixed_resource = {
 602         .enable         = twl6030reg_enable,
 603         .disable        = twlreg_disable,
 604         .is_enabled     = twl6030reg_is_enabled,
 605         .get_status     = twl6030reg_get_status,
 606 };
 607
 608 /*----------------------------------------------------------------------*/
 609
 610 #define TWL4030_FIXED_LDO(label, offset, mVolts, num, turnon_delay, \
 611                         remap_conf) \
 612                 TWL_FIXED_LDO(label, offset, mVolts, num, turnon_delay, \
 613                         remap_conf, TWL4030, twl4030fixed_ops)
 614 #define TWL6030_FIXED_LDO(label, offset, mVolts, num, turnon_delay) \
 615                 TWL_FIXED_LDO(label, offset, mVolts, num, turnon_delay, \
 616                         0x0, TWL6030, twl6030fixed_ops)
 617
 618 #define TWL4030_ADJUSTABLE_LDO(label, offset, num, turnon_delay, remap_conf) { \
 619         .base = offset, \
 620         .id = num, \
 621         .table_len = ARRAY_SIZE(label##_VSEL_table), \
 622         .table = label##_VSEL_table, \
 623         .delay = turnon_delay, \
 624         .remap = remap_conf, \
 625         .desc = { \
 626                 .name = #label, \
 627                 .id = TWL4030_REG_##label, \
 628                 .n_voltages = ARRAY_SIZE(label##_VSEL_table), \
 629                 .ops = &twl4030ldo_ops, \
 630                 .type = REGULATOR_VOLTAGE, \
 631                 .owner = THIS_MODULE, \
 632                 }, \
 633         }
 634
 635 #define TWL6030_ADJUSTABLE_LDO(label, offset, min_mVolts, max_mVolts, num) { \
 636         .base = offset, \
 637         .id = num, \
 638         .min_mV = min_mVolts, \
 639         .max_mV = max_mVolts, \
 640         .desc = { \
 641                 .name = #label, \
 642                 .id = TWL6030_REG_##label, \
 643                 .n_voltages = (max_mVolts - min_mVolts)/100, \
 644                 .ops = &twl6030ldo_ops, \
 645                 .type = REGULATOR_VOLTAGE, \
 646                 .owner = THIS_MODULE, \
 647                 }, \
 648         }
 649
 650
 651 #define TWL_FIXED_LDO(label, offset, mVolts, num, turnon_delay, remap_conf, \
 652                 family, operations) { \
 653         .base = offset, \
 654         .id = num, \
 655         .min_mV = mVolts, \
 656         .delay = turnon_delay, \
 657         .remap = remap_conf, \
 658         .desc = { \
 659                 .name = #label, \
 660                 .id = family##_REG_##label, \
 661                 .n_voltages = 1, \
 662                 .ops = &operations, \
 663                 .type = REGULATOR_VOLTAGE, \
 664                 .owner = THIS_MODULE, \
 665                 }, \
 666         }
 667
 668 #define TWL6030_FIXED_RESOURCE(label, offset, num, turnon_delay) { \
 669         .base = offset, \
 670         .id = num, \
 671         .delay = turnon_delay, \
 672         .desc = { \
 673                 .name = #label, \
 674                 .id = TWL6030_REG_##label, \
 675                 .ops = &twl6030_fixed_resource, \
 676                 .type = REGULATOR_VOLTAGE, \
 677                 .owner = THIS_MODULE, \
 678                 }, \
 679         }
 680
 681 /*
 682  * We list regulators here if systems need some level of
 683  * software control over them after boot.
 684  */
 685 static struct twlreg_info twl_regs[] = {
 686         TWL4030_ADJUSTABLE_LDO(VAUX1, 0x17, 1, 100, 0x08),
 687         TWL4030_ADJUSTABLE_LDO(VAUX2_4030, 0x1b, 2, 100, 0x08),
 688         TWL4030_ADJUSTABLE_LDO(VAUX2, 0x1b, 2, 100, 0x08),
 689         TWL4030_ADJUSTABLE_LDO(VAUX3, 0x1f, 3, 100, 0x08),
 690         TWL4030_ADJUSTABLE_LDO(VAUX4, 0x23, 4, 100, 0x08),
 691         TWL4030_ADJUSTABLE_LDO(VMMC1, 0x27, 5, 100, 0x08),
 692         TWL4030_ADJUSTABLE_LDO(VMMC2, 0x2b, 6, 100, 0x08),
 693         TWL4030_ADJUSTABLE_LDO(VPLL1, 0x2f, 7, 100, 0x00),
 694         TWL4030_ADJUSTABLE_LDO(VPLL2, 0x33, 8, 100, 0x08),
 695         TWL4030_ADJUSTABLE_LDO(VSIM, 0x37, 9, 100, 0x00),
 696         TWL4030_ADJUSTABLE_LDO(VDAC, 0x3b, 10, 100, 0x08),
 697         TWL4030_FIXED_LDO(VINTANA1, 0x3f, 1500, 11, 100, 0x08),
 698         TWL4030_ADJUSTABLE_LDO(VINTANA2, 0x43, 12, 100, 0x08),
 699         TWL4030_FIXED_LDO(VINTDIG, 0x47, 1500, 13, 100, 0x08),
 700         TWL4030_ADJUSTABLE_LDO(VIO, 0x4b, 14, 1000, 0x08),
 701         TWL4030_ADJUSTABLE_LDO(VDD1, 0x55, 15, 1000, 0x08),
 702         TWL4030_ADJUSTABLE_LDO(VDD2, 0x63, 16, 1000, 0x08),
 703         TWL4030_FIXED_LDO(VUSB1V5, 0x71, 1500, 17, 100, 0x08),
 704         TWL4030_FIXED_LDO(VUSB1V8, 0x74, 1800, 18, 100, 0x08),
 705         TWL4030_FIXED_LDO(VUSB3V1, 0x77, 3100, 19, 150, 0x08),
 706         /* VUSBCP is managed *only* by the USB subchip */
 707
 708         /* 6030 REG with base as PMC Slave Misc : 0x0030 */
 709         /* Turnon-delay and remap configuration values for 6030 are not
 710            verified since the specification is not public */
 711         TWL6030_ADJUSTABLE_LDO(VAUX1_6030, 0x54, 1000, 3300, 1),
 712         TWL6030_ADJUSTABLE_LDO(VAUX2_6030, 0x58, 1000, 3300, 2),
 713         TWL6030_ADJUSTABLE_LDO(VAUX3_6030, 0x5c, 1000, 3300, 3),
 714         TWL6030_ADJUSTABLE_LDO(VMMC, 0x68, 1000, 3300, 4),
 715         TWL6030_ADJUSTABLE_LDO(VPP, 0x6c, 1000, 3300, 5),
 716         TWL6030_ADJUSTABLE_LDO(VUSIM, 0x74, 1000, 3300, 7),
 717         TWL6030_FIXED_LDO(VANA, 0x50, 2100, 15, 0),
 718         TWL6030_FIXED_LDO(VCXIO, 0x60, 1800, 16, 0),
 719         TWL6030_FIXED_LDO(VDAC, 0x64, 1800, 17, 0),
 720         TWL6030_FIXED_LDO(VUSB, 0x70, 3300, 18, 0),
 721         TWL6030_FIXED_RESOURCE(CLK32KG, 0x8C, 48, 0),
 722 };
 723
 724 static int __devinit twlreg_probe(struct platform_device *pdev)
 725 {
 726         int                             i;
 727         struct twlreg_info              *info;
 728         struct regulator_init_data      *initdata;
 729         struct regulation_constraints   *c;
 730         struct regulator_dev            *rdev;
 731
 732         for (i = 0, info = NULL; i < ARRAY_SIZE(twl_regs); i++) {
 733                 if (twl_regs[i].desc.id != pdev->id)
 734                         continue;
 735                 info = twl_regs + i;
 736                 break;
 737         }
 738         if (!info)
 739                 return -ENODEV;
 740
 741         initdata = pdev->dev.platform_data;
 742         if (!initdata)
 743                 return -EINVAL;
 744
 745         /* Constrain board-specific capabilities according to what
 746          * this driver and the chip itself can actually do.
 747          */
 748         c = &initdata->constraints;
 749         c->valid_modes_mask &= REGULATOR_MODE_NORMAL | REGULATOR_MODE_STANDBY;
 750         c->valid_ops_mask &= REGULATOR_CHANGE_VOLTAGE
 751                                 | REGULATOR_CHANGE_MODE
 752                                 | REGULATOR_CHANGE_STATUS;
 753         switch (pdev->id) {
 754         case TWL4030_REG_VIO:
 755         case TWL4030_REG_VDD1:
 756         case TWL4030_REG_VDD2:
 757         case TWL4030_REG_VPLL1:
 758         case TWL4030_REG_VINTANA1:
 759         case TWL4030_REG_VINTANA2:
 760         case TWL4030_REG_VINTDIG:
 761                 c->always_on = true;
 762                 break;
 763         default:
 764                 break;
 765         }
 766
 767         rdev = regulator_register(&info->desc, &pdev->dev, initdata, info);
 768         if (IS_ERR(rdev)) {
 769                 dev_err(&pdev->dev, "can't register %s, %ld\n",
 770                                 info->desc.name, PTR_ERR(rdev));
 771                 return PTR_ERR(rdev);
 772         }
 773         platform_set_drvdata(pdev, rdev);
 774
 775         if (twl_class_is_4030())
 776                 twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_REMAP,
 777                                                 info->remap);
 778
 779         /* NOTE:  many regulators support short-circuit IRQs (presentable
 780          * as REGULATOR_OVER_CURRENT notifications?) configured via:
 781          *  - SC_CONFIG
 782          *  - SC_DETECT1 (vintana2, vmmc1/2, vaux1/2/3/4)
 783          *  - SC_DETECT2 (vusb, vdac, vio, vdd1/2, vpll2)
 784          *  - IT_CONFIG
 785          */
 786
 787         return 0;
 788 }
 789
 790 static int __devexit twlreg_remove(struct platform_device *pdev)
 791 {
 792         regulator_unregister(platform_get_drvdata(pdev));
 793         return 0;
 794 }
 795
 796 MODULE_ALIAS("platform:twl_reg");
 797
 798 static struct platform_driver twlreg_driver = {
 799         .probe          = twlreg_probe,
 800         .remove         = __devexit_p(twlreg_remove),
 801         /* NOTE: short name, to work around driver model truncation of
 802          * "twl_regulator.12" (and friends) to "twl_regulator.1".
 803          */
 804         .driver.name    = "twl_reg",
 805         .driver.owner   = THIS_MODULE,
 806 };
 807
 808 static int __init twlreg_init(void)
 809 {
 810         return platform_driver_register(&twlreg_driver);
 811 }
 812 subsys_initcall(twlreg_init);
 813
 814 static void __exit twlreg_exit(void)
 815 {
 816         platform_driver_unregister(&twlreg_driver);
 817 }
 818 module_exit(twlreg_exit)
 819
 820 MODULE_DESCRIPTION("TWL regulator driver");
 821 MODULE_LICENSE("GPL");