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/string.h>
  14 #include <linux/slab.h>
  15 #include <linux/init.h>
  16 #include <linux/err.h>
  17 #include <linux/platform_device.h>
  18 #include <linux/of.h>
  19 #include <linux/of_device.h>
  20 #include <linux/regulator/driver.h>
  21 #include <linux/regulator/machine.h>
  22 #include <linux/regulator/of_regulator.h>
  23 #include <linux/i2c/twl.h>
  24
  25
  26 /*
  27  * The TWL4030/TW5030/TPS659x0/TWL6030 family chips include power management, a
  28  * USB OTG transceiver, an RTC, ADC, PWM, and lots more.  Some versions
  29  * include an audio codec, battery charger, and more voltage regulators.
  30  * These chips are often used in OMAP-based systems.
  31  *
  32  * This driver implements software-based resource control for various
  33  * voltage regulators.  This is usually augmented with state machine
  34  * based control.
  35  */
  36
  37 struct twlreg_info {
  38         /* start of regulator's PM_RECEIVER control register bank */
  39         u8                      base;
  40
  41         /* twl resource ID, for resource control state machine */
  42         u8                      id;
  43
  44         /* voltage in mV = table[VSEL]; table_len must be a power-of-two */
  45         u8                      table_len;
  46         const u16               *table;
  47
  48         /* State REMAP default configuration */
  49         u8                      remap;
  50
  51         /* chip constraints on regulator behavior */
  52         u16                     min_mV;
  53         u16                     max_mV;
  54
  55         u8                      flags;
  56
  57         /* used by regulator core */
  58         struct regulator_desc   desc;
  59
  60         /* chip specific features */
  61         unsigned long           features;
  62
  63         /*
  64          * optional override functions for voltage set/get
  65          * these are currently only used for SMPS regulators
  66          */
  67         int                     (*get_voltage)(void *data);
  68         int                     (*set_voltage)(void *data, int target_uV);
  69
  70         /* data passed from board for external get/set voltage */
  71         void                    *data;
  72 };
  73
  74
  75 /* LDO control registers ... offset is from the base of its register bank.
  76  * The first three registers of all power resource banks help hardware to
  77  * manage the various resource groups.
  78  */
  79 /* Common offset in TWL4030/6030 */
  80 #define VREG_GRP                0
  81 /* TWL4030 register offsets */
  82 #define VREG_TYPE               1
  83 #define VREG_REMAP              2
  84 #define VREG_DEDICATED          3       /* LDO control */
  85 #define VREG_VOLTAGE_SMPS_4030  9
  86 /* TWL6030 register offsets */
  87 #define VREG_TRANS              1
  88 #define VREG_STATE              2
  89 #define VREG_VOLTAGE            3
  90 #define VREG_VOLTAGE_SMPS       4
  91 /* TWL6030 Misc register offsets */
  92 #define VREG_BC_ALL             1
  93 #define VREG_BC_REF             2
  94 #define VREG_BC_PROC            3
  95 #define VREG_BC_CLK_RST         4
  96
  97 /* TWL6030 LDO register values for CFG_STATE */
  98 #define TWL6030_CFG_STATE_OFF   0x00
  99 #define TWL6030_CFG_STATE_ON    0x01
 100 #define TWL6030_CFG_STATE_OFF2  0x02
 101 #define TWL6030_CFG_STATE_SLEEP 0x03
 102 #define TWL6030_CFG_STATE_GRP_SHIFT     5
 103 #define TWL6030_CFG_STATE_APP_SHIFT     2
 104 #define TWL6030_CFG_STATE_APP_MASK      (0x03 << TWL6030_CFG_STATE_APP_SHIFT)
 105 #define TWL6030_CFG_STATE_APP(v)        (((v) & TWL6030_CFG_STATE_APP_MASK) >>\
 106                                                 TWL6030_CFG_STATE_APP_SHIFT)
 107
 108 /* Flags for SMPS Voltage reading */
 109 #define SMPS_OFFSET_EN          BIT(0)
 110 #define SMPS_EXTENDED_EN        BIT(1)
 111
 112 /* twl6025 SMPS EPROM values */
 113 #define TWL6030_SMPS_OFFSET             0xB0
 114 #define TWL6030_SMPS_MULT               0xB3
 115 #define SMPS_MULTOFFSET_SMPS4   BIT(0)
 116 #define SMPS_MULTOFFSET_VIO     BIT(1)
 117 #define SMPS_MULTOFFSET_SMPS3   BIT(6)
 118
 119 static inline int
 120 twlreg_read(struct twlreg_info *info, unsigned slave_subgp, unsigned offset)
 121 {
 122         u8 value;
 123         int status;
 124
 125         status = twl_i2c_read_u8(slave_subgp,
 126                         &value, info->base + offset);
 127         return (status < 0) ? status : value;
 128 }
 129
 130 static inline int
 131 twlreg_write(struct twlreg_info *info, unsigned slave_subgp, unsigned offset,
 132                                                  u8 value)
 133 {
 134         return twl_i2c_write_u8(slave_subgp,
 135                         value, info->base + offset);
 136 }
 137
 138 /*----------------------------------------------------------------------*/
 139
 140 /* generic power resource operations, which work on all regulators */
 141
 142 static int twlreg_grp(struct regulator_dev *rdev)
 143 {
 144         return twlreg_read(rdev_get_drvdata(rdev), TWL_MODULE_PM_RECEIVER,
 145                                                                  VREG_GRP);
 146 }
 147
 148 /*
 149  * Enable/disable regulators by joining/leaving the P1 (processor) group.
 150  * We assume nobody else is updating the DEV_GRP registers.
 151  */
 152 /* definition for 4030 family */
 153 #define P3_GRP_4030     BIT(7)          /* "peripherals" */
 154 #define P2_GRP_4030     BIT(6)          /* secondary processor, modem, etc */
 155 #define P1_GRP_4030     BIT(5)          /* CPU/Linux */
 156 /* definition for 6030 family */
 157 #define P3_GRP_6030     BIT(2)          /* secondary processor, modem, etc */
 158 #define P2_GRP_6030     BIT(1)          /* "peripherals" */
 159 #define P1_GRP_6030     BIT(0)          /* CPU/Linux */
 160
 161 static int twl4030reg_is_enabled(struct regulator_dev *rdev)
 162 {
 163         int     state = twlreg_grp(rdev);
 164
 165         if (state < 0)
 166                 return state;
 167
 168         return state & P1_GRP_4030;
 169 }
 170
 171 static int twl6030reg_is_enabled(struct regulator_dev *rdev)
 172 {
 173         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 174         int                     grp = 0, val;
 175
 176         if (!(twl_class_is_6030() && (info->features & TWL6025_SUBCLASS))) {
 177                 grp = twlreg_grp(rdev);
 178                 if (grp < 0)
 179                         return grp;
 180                 grp &= P1_GRP_6030;
 181         } else {
 182                 grp = 1;
 183         }
 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_grp(rdev);
 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         return ret;
 206 }
 207
 208 static int twl6030reg_enable(struct regulator_dev *rdev)
 209 {
 210         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 211         int                     grp = 0;
 212         int                     ret;
 213
 214         if (!(twl_class_is_6030() && (info->features & TWL6025_SUBCLASS)))
 215                 grp = twlreg_grp(rdev);
 216         if (grp < 0)
 217                 return grp;
 218
 219         ret = twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_STATE,
 220                         grp << TWL6030_CFG_STATE_GRP_SHIFT |
 221                         TWL6030_CFG_STATE_ON);
 222         return ret;
 223 }
 224
 225 static int twl4030reg_disable(struct regulator_dev *rdev)
 226 {
 227         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 228         int                     grp;
 229         int                     ret;
 230
 231         grp = twlreg_grp(rdev);
 232         if (grp < 0)
 233                 return grp;
 234
 235         grp &= ~(P1_GRP_4030 | P2_GRP_4030 | P3_GRP_4030);
 236
 237         ret = twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_GRP, grp);
 238
 239         return ret;
 240 }
 241
 242 static int twl6030reg_disable(struct regulator_dev *rdev)
 243 {
 244         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 245         int                     grp = 0;
 246         int                     ret;
 247
 248         if (!(twl_class_is_6030() && (info->features & TWL6025_SUBCLASS)))
 249                 grp = P1_GRP_6030 | P2_GRP_6030 | P3_GRP_6030;
 250
 251         /* For 6030, set the off state for all grps enabled */
 252         ret = twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_STATE,
 253                         (grp) << TWL6030_CFG_STATE_GRP_SHIFT |
 254                         TWL6030_CFG_STATE_OFF);
 255
 256         return ret;
 257 }
 258
 259 static int twl4030reg_get_status(struct regulator_dev *rdev)
 260 {
 261         int     state = twlreg_grp(rdev);
 262
 263         if (state < 0)
 264                 return state;
 265         state &= 0x0f;
 266
 267         /* assume state != WARM_RESET; we'd not be running...  */
 268         if (!state)
 269                 return REGULATOR_STATUS_OFF;
 270         return (state & BIT(3))
 271                 ? REGULATOR_STATUS_NORMAL
 272                 : REGULATOR_STATUS_STANDBY;
 273 }
 274
 275 static int twl6030reg_get_status(struct regulator_dev *rdev)
 276 {
 277         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 278         int                     val;
 279
 280         val = twlreg_grp(rdev);
 281         if (val < 0)
 282                 return val;
 283
 284         val = twlreg_read(info, TWL_MODULE_PM_RECEIVER, VREG_STATE);
 285
 286         switch (TWL6030_CFG_STATE_APP(val)) {
 287         case TWL6030_CFG_STATE_ON:
 288                 return REGULATOR_STATUS_NORMAL;
 289
 290         case TWL6030_CFG_STATE_SLEEP:
 291                 return REGULATOR_STATUS_STANDBY;
 292
 293         case TWL6030_CFG_STATE_OFF:
 294         case TWL6030_CFG_STATE_OFF2:
 295         default:
 296                 break;
 297         }
 298
 299         return REGULATOR_STATUS_OFF;
 300 }
 301
 302 static int twl4030reg_set_mode(struct regulator_dev *rdev, unsigned mode)
 303 {
 304         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 305         unsigned                message;
 306         int                     status;
 307
 308         /* We can only set the mode through state machine commands... */
 309         switch (mode) {
 310         case REGULATOR_MODE_NORMAL:
 311                 message = MSG_SINGULAR(DEV_GRP_P1, info->id, RES_STATE_ACTIVE);
 312                 break;
 313         case REGULATOR_MODE_STANDBY:
 314                 message = MSG_SINGULAR(DEV_GRP_P1, info->id, RES_STATE_SLEEP);
 315                 break;
 316         default:
 317                 return -EINVAL;
 318         }
 319
 320         /* Ensure the resource is associated with some group */
 321         status = twlreg_grp(rdev);
 322         if (status < 0)
 323                 return status;
 324         if (!(status & (P3_GRP_4030 | P2_GRP_4030 | P1_GRP_4030)))
 325                 return -EACCES;
 326
 327         status = twl_i2c_write_u8(TWL_MODULE_PM_MASTER,
 328                         message >> 8, TWL4030_PM_MASTER_PB_WORD_MSB);
 329         if (status < 0)
 330                 return status;
 331
 332         return twl_i2c_write_u8(TWL_MODULE_PM_MASTER,
 333                         message & 0xff, TWL4030_PM_MASTER_PB_WORD_LSB);
 334 }
 335
 336 static int twl6030reg_set_mode(struct regulator_dev *rdev, unsigned mode)
 337 {
 338         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 339         int grp = 0;
 340         int val;
 341
 342         if (!(twl_class_is_6030() && (info->features & TWL6025_SUBCLASS)))
 343                 grp = twlreg_grp(rdev);
 344
 345         if (grp < 0)
 346                 return grp;
 347
 348         /* Compose the state register settings */
 349         val = grp << TWL6030_CFG_STATE_GRP_SHIFT;
 350         /* We can only set the mode through state machine commands... */
 351         switch (mode) {
 352         case REGULATOR_MODE_NORMAL:
 353                 val |= TWL6030_CFG_STATE_ON;
 354                 break;
 355         case REGULATOR_MODE_STANDBY:
 356                 val |= TWL6030_CFG_STATE_SLEEP;
 357                 break;
 358
 359         default:
 360                 return -EINVAL;
 361         }
 362
 363         return twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_STATE, val);
 364 }
 365
 366 /*----------------------------------------------------------------------*/
 367
 368 /*
 369  * Support for adjustable-voltage LDOs uses a four bit (or less) voltage
 370  * select field in its control register.   We use tables indexed by VSEL
 371  * to record voltages in milliVolts.  (Accuracy is about three percent.)
 372  *
 373  * Note that VSEL values for VAUX2 changed in twl5030 and newer silicon;
 374  * currently handled by listing two slightly different VAUX2 regulators,
 375  * only one of which will be configured.
 376  *
 377  * VSEL values documented as "TI cannot support these values" are flagged
 378  * in these tables as UNSUP() values; we normally won't assign them.
 379  *
 380  * VAUX3 at 3V is incorrectly listed in some TI manuals as unsupported.
 381  * TI are revising the twl5030/tps659x0 specs to support that 3.0V setting.
 382  */
 383 #define UNSUP_MASK      0x8000
 384
 385 #define UNSUP(x)        (UNSUP_MASK | (x))
 386 #define IS_UNSUP(info, x)                       \
 387         ((UNSUP_MASK & (x)) &&                  \
 388          !((info)->features & TWL4030_ALLOW_UNSUPPORTED))
 389 #define LDO_MV(x)       (~UNSUP_MASK & (x))
 390
 391
 392 static const u16 VAUX1_VSEL_table[] = {
 393         UNSUP(1500), UNSUP(1800), 2500, 2800,
 394         3000, 3000, 3000, 3000,
 395 };
 396 static const u16 VAUX2_4030_VSEL_table[] = {
 397         UNSUP(1000), UNSUP(1000), UNSUP(1200), 1300,
 398         1500, 1800, UNSUP(1850), 2500,
 399         UNSUP(2600), 2800, UNSUP(2850), UNSUP(3000),
 400         UNSUP(3150), UNSUP(3150), UNSUP(3150), UNSUP(3150),
 401 };
 402 static const u16 VAUX2_VSEL_table[] = {
 403         1700, 1700, 1900, 1300,
 404         1500, 1800, 2000, 2500,
 405         2100, 2800, 2200, 2300,
 406         2400, 2400, 2400, 2400,
 407 };
 408 static const u16 VAUX3_VSEL_table[] = {
 409         1500, 1800, 2500, 2800,
 410         3000, 3000, 3000, 3000,
 411 };
 412 static const u16 VAUX4_VSEL_table[] = {
 413         700, 1000, 1200, UNSUP(1300),
 414         1500, 1800, UNSUP(1850), 2500,
 415         UNSUP(2600), 2800, UNSUP(2850), UNSUP(3000),
 416         UNSUP(3150), UNSUP(3150), UNSUP(3150), UNSUP(3150),
 417 };
 418 static const u16 VMMC1_VSEL_table[] = {
 419         1850, 2850, 3000, 3150,
 420 };
 421 static const u16 VMMC2_VSEL_table[] = {
 422         UNSUP(1000), UNSUP(1000), UNSUP(1200), UNSUP(1300),
 423         UNSUP(1500), UNSUP(1800), 1850, UNSUP(2500),
 424         2600, 2800, 2850, 3000,
 425         3150, 3150, 3150, 3150,
 426 };
 427 static const u16 VPLL1_VSEL_table[] = {
 428         1000, 1200, 1300, 1800,
 429         UNSUP(2800), UNSUP(3000), UNSUP(3000), UNSUP(3000),
 430 };
 431 static const u16 VPLL2_VSEL_table[] = {
 432         700, 1000, 1200, 1300,
 433         UNSUP(1500), 1800, UNSUP(1850), UNSUP(2500),
 434         UNSUP(2600), UNSUP(2800), UNSUP(2850), UNSUP(3000),
 435         UNSUP(3150), UNSUP(3150), UNSUP(3150), UNSUP(3150),
 436 };
 437 static const u16 VSIM_VSEL_table[] = {
 438         UNSUP(1000), UNSUP(1200), UNSUP(1300), 1800,
 439         2800, 3000, 3000, 3000,
 440 };
 441 static const u16 VDAC_VSEL_table[] = {
 442         1200, 1300, 1800, 1800,
 443 };
 444 static const u16 VDD1_VSEL_table[] = {
 445         800, 1450,
 446 };
 447 static const u16 VDD2_VSEL_table[] = {
 448         800, 1450, 1500,
 449 };
 450 static const u16 VIO_VSEL_table[] = {
 451         1800, 1850,
 452 };
 453 static const u16 VINTANA2_VSEL_table[] = {
 454         2500, 2750,
 455 };
 456
 457 static int twl4030ldo_list_voltage(struct regulator_dev *rdev, unsigned index)
 458 {
 459         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 460         int                     mV = info->table[index];
 461
 462         return IS_UNSUP(info, mV) ? 0 : (LDO_MV(mV) * 1000);
 463 }
 464
 465 static int
 466 twl4030ldo_set_voltage_sel(struct regulator_dev *rdev, unsigned selector)
 467 {
 468         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 469
 470         return twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_VOLTAGE,
 471                             selector);
 472 }
 473
 474 static int twl4030ldo_get_voltage(struct regulator_dev *rdev)
 475 {
 476         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 477         int             vsel = twlreg_read(info, TWL_MODULE_PM_RECEIVER,
 478                                                                 VREG_VOLTAGE);
 479
 480         if (vsel < 0)
 481                 return vsel;
 482
 483         vsel &= info->table_len - 1;
 484         return LDO_MV(info->table[vsel]) * 1000;
 485 }
 486
 487 static struct regulator_ops twl4030ldo_ops = {
 488         .list_voltage   = twl4030ldo_list_voltage,
 489
 490         .set_voltage_sel = twl4030ldo_set_voltage_sel,
 491         .get_voltage    = twl4030ldo_get_voltage,
 492
 493         .enable         = twl4030reg_enable,
 494         .disable        = twl4030reg_disable,
 495         .is_enabled     = twl4030reg_is_enabled,
 496
 497         .set_mode       = twl4030reg_set_mode,
 498
 499         .get_status     = twl4030reg_get_status,
 500 };
 501
 502 static int
 503 twl4030smps_set_voltage(struct regulator_dev *rdev, int min_uV, int max_uV,
 504                         unsigned *selector)
 505 {
 506         struct twlreg_info *info = rdev_get_drvdata(rdev);
 507         int vsel = DIV_ROUND_UP(min_uV - 600000, 12500);
 508
 509         if (info->set_voltage) {
 510                 return info->set_voltage(info->data, min_uV);
 511         } else {
 512                 twlreg_write(info, TWL_MODULE_PM_RECEIVER,
 513                         VREG_VOLTAGE_SMPS_4030, vsel);
 514         }
 515
 516         return 0;
 517 }
 518
 519 static int twl4030smps_get_voltage(struct regulator_dev *rdev)
 520 {
 521         struct twlreg_info *info = rdev_get_drvdata(rdev);
 522         int vsel;
 523
 524         if (info->get_voltage)
 525                 return info->get_voltage(info->data);
 526
 527         vsel = twlreg_read(info, TWL_MODULE_PM_RECEIVER,
 528                 VREG_VOLTAGE_SMPS_4030);
 529
 530         return vsel * 12500 + 600000;
 531 }
 532
 533 static struct regulator_ops twl4030smps_ops = {
 534         .set_voltage    = twl4030smps_set_voltage,
 535         .get_voltage    = twl4030smps_get_voltage,
 536 };
 537
 538 static int twl6030coresmps_set_voltage(struct regulator_dev *rdev, int min_uV,
 539         int max_uV, unsigned *selector)
 540 {
 541         struct twlreg_info *info = rdev_get_drvdata(rdev);
 542
 543         if (info->set_voltage)
 544                 return info->set_voltage(info->data, min_uV);
 545
 546         return -ENODEV;
 547 }
 548
 549 static int twl6030coresmps_get_voltage(struct regulator_dev *rdev)
 550 {
 551         struct twlreg_info *info = rdev_get_drvdata(rdev);
 552
 553         if (info->get_voltage)
 554                 return info->get_voltage(info->data);
 555
 556         return -ENODEV;
 557 }
 558
 559 static struct regulator_ops twl6030coresmps_ops = {
 560         .set_voltage    = twl6030coresmps_set_voltage,
 561         .get_voltage    = twl6030coresmps_get_voltage,
 562 };
 563
 564 static int twl6030ldo_list_voltage(struct regulator_dev *rdev, unsigned sel)
 565 {
 566         struct twlreg_info *info = rdev_get_drvdata(rdev);
 567
 568         switch (sel) {
 569         case 0:
 570                 return 0;
 571         case 1 ... 24:
 572                 /* Linear mapping from 00000001 to 00011000:
 573                  * Absolute voltage value = 1.0 V + 0.1 V × (sel – 00000001)
 574                  */
 575                 return (info->min_mV + 100 * (sel - 1)) * 1000;
 576         case 25 ... 30:
 577                 return -EINVAL;
 578         case 31:
 579                 return 2750000;
 580         default:
 581                 return -EINVAL;
 582         }
 583 }
 584
 585 static int
 586 twl6030ldo_set_voltage_sel(struct regulator_dev *rdev, unsigned selector)
 587 {
 588         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 589
 590         return twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_VOLTAGE,
 591                             selector);
 592 }
 593
 594 static int twl6030ldo_get_voltage_sel(struct regulator_dev *rdev)
 595 {
 596         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 597         int vsel = twlreg_read(info, TWL_MODULE_PM_RECEIVER, VREG_VOLTAGE);
 598
 599         return vsel;
 600 }
 601
 602 static struct regulator_ops twl6030ldo_ops = {
 603         .list_voltage   = twl6030ldo_list_voltage,
 604
 605         .set_voltage_sel = twl6030ldo_set_voltage_sel,
 606         .get_voltage_sel = twl6030ldo_get_voltage_sel,
 607
 608         .enable         = twl6030reg_enable,
 609         .disable        = twl6030reg_disable,
 610         .is_enabled     = twl6030reg_is_enabled,
 611
 612         .set_mode       = twl6030reg_set_mode,
 613
 614         .get_status     = twl6030reg_get_status,
 615 };
 616
 617 /*----------------------------------------------------------------------*/
 618
 619 /*
 620  * Fixed voltage LDOs don't have a VSEL field to update.
 621  */
 622 static int twlfixed_list_voltage(struct regulator_dev *rdev, unsigned index)
 623 {
 624         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 625
 626         return info->min_mV * 1000;
 627 }
 628
 629 static struct regulator_ops twl4030fixed_ops = {
 630         .list_voltage   = twlfixed_list_voltage,
 631
 632         .enable         = twl4030reg_enable,
 633         .disable        = twl4030reg_disable,
 634         .is_enabled     = twl4030reg_is_enabled,
 635
 636         .set_mode       = twl4030reg_set_mode,
 637
 638         .get_status     = twl4030reg_get_status,
 639 };
 640
 641 static struct regulator_ops twl6030fixed_ops = {
 642         .list_voltage   = twlfixed_list_voltage,
 643
 644         .enable         = twl6030reg_enable,
 645         .disable        = twl6030reg_disable,
 646         .is_enabled     = twl6030reg_is_enabled,
 647
 648         .set_mode       = twl6030reg_set_mode,
 649
 650         .get_status     = twl6030reg_get_status,
 651 };
 652
 653 /*
 654  * SMPS status and control
 655  */
 656
 657 static int twl6030smps_list_voltage(struct regulator_dev *rdev, unsigned index)
 658 {
 659         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 660
 661         int voltage = 0;
 662
 663         switch (info->flags) {
 664         case SMPS_OFFSET_EN:
 665                 voltage = 100000;
 666                 /* fall through */
 667         case 0:
 668                 switch (index) {
 669                 case 0:
 670                         voltage = 0;
 671                         break;
 672                 case 58:
 673                         voltage = 1350 * 1000;
 674                         break;
 675                 case 59:
 676                         voltage = 1500 * 1000;
 677                         break;
 678                 case 60:
 679                         voltage = 1800 * 1000;
 680                         break;
 681                 case 61:
 682                         voltage = 1900 * 1000;
 683                         break;
 684                 case 62:
 685                         voltage = 2100 * 1000;
 686                         break;
 687                 default:
 688                         voltage += (600000 + (12500 * (index - 1)));
 689                 }
 690                 break;
 691         case SMPS_EXTENDED_EN:
 692                 switch (index) {
 693                 case 0:
 694                         voltage = 0;
 695                         break;
 696                 case 58:
 697                         voltage = 2084 * 1000;
 698                         break;
 699                 case 59:
 700                         voltage = 2315 * 1000;
 701                         break;
 702                 case 60:
 703                         voltage = 2778 * 1000;
 704                         break;
 705                 case 61:
 706                         voltage = 2932 * 1000;
 707                         break;
 708                 case 62:
 709                         voltage = 3241 * 1000;
 710                         break;
 711                 default:
 712                         voltage = (1852000 + (38600 * (index - 1)));
 713                 }
 714                 break;
 715         case SMPS_OFFSET_EN | SMPS_EXTENDED_EN:
 716                 switch (index) {
 717                 case 0:
 718                         voltage = 0;
 719                         break;
 720                 case 58:
 721                         voltage = 4167 * 1000;
 722                         break;
 723                 case 59:
 724                         voltage = 2315 * 1000;
 725                         break;
 726                 case 60:
 727                         voltage = 2778 * 1000;
 728                         break;
 729                 case 61:
 730                         voltage = 2932 * 1000;
 731                         break;
 732                 case 62:
 733                         voltage = 3241 * 1000;
 734                         break;
 735                 default:
 736                         voltage = (2161000 + (38600 * (index - 1)));
 737                 }
 738                 break;
 739         }
 740
 741         return voltage;
 742 }
 743
 744 static int twl6030smps_map_voltage(struct regulator_dev *rdev, int min_uV,
 745                                    int max_uV)
 746 {
 747         struct twlreg_info *info = rdev_get_drvdata(rdev);
 748         int vsel = 0;
 749
 750         switch (info->flags) {
 751         case 0:
 752                 if (min_uV == 0)
 753                         vsel = 0;
 754                 else if ((min_uV >= 600000) && (min_uV <= 1300000)) {
 755                         vsel = DIV_ROUND_UP(min_uV - 600000, 12500);
 756                         vsel++;
 757                 }
 758                 /* Values 1..57 for vsel are linear and can be calculated
 759                  * values 58..62 are non linear.
 760                  */
 761                 else if ((min_uV > 1900000) && (min_uV <= 2100000))
 762                         vsel = 62;
 763                 else if ((min_uV > 1800000) && (min_uV <= 1900000))
 764                         vsel = 61;
 765                 else if ((min_uV > 1500000) && (min_uV <= 1800000))
 766                         vsel = 60;
 767                 else if ((min_uV > 1350000) && (min_uV <= 1500000))
 768                         vsel = 59;
 769                 else if ((min_uV > 1300000) && (min_uV <= 1350000))
 770                         vsel = 58;
 771                 else
 772                         return -EINVAL;
 773                 break;
 774         case SMPS_OFFSET_EN:
 775                 if (min_uV == 0)
 776                         vsel = 0;
 777                 else if ((min_uV >= 700000) && (min_uV <= 1420000)) {
 778                         vsel = DIV_ROUND_UP(min_uV - 700000, 12500);
 779                         vsel++;
 780                 }
 781                 /* Values 1..57 for vsel are linear and can be calculated
 782                  * values 58..62 are non linear.
 783                  */
 784                 else if ((min_uV > 1900000) && (min_uV <= 2100000))
 785                         vsel = 62;
 786                 else if ((min_uV > 1800000) && (min_uV <= 1900000))
 787                         vsel = 61;
 788                 else if ((min_uV > 1350000) && (min_uV <= 1800000))
 789                         vsel = 60;
 790                 else if ((min_uV > 1350000) && (min_uV <= 1500000))
 791                         vsel = 59;
 792                 else if ((min_uV > 1300000) && (min_uV <= 1350000))
 793                         vsel = 58;
 794                 else
 795                         return -EINVAL;
 796                 break;
 797         case SMPS_EXTENDED_EN:
 798                 if (min_uV == 0) {
 799                         vsel = 0;
 800                 } else if ((min_uV >= 1852000) && (max_uV <= 4013600)) {
 801                         vsel = DIV_ROUND_UP(min_uV - 1852000, 38600);
 802                         vsel++;
 803                 }
 804                 break;
 805         case SMPS_OFFSET_EN|SMPS_EXTENDED_EN:
 806                 if (min_uV == 0) {
 807                         vsel = 0;
 808                 } else if ((min_uV >= 2161000) && (min_uV <= 4321000)) {
 809                         vsel = DIV_ROUND_UP(min_uV - 2161000, 38600);
 810                         vsel++;
 811                 }
 812                 break;
 813         }
 814
 815         return vsel;
 816 }
 817
 818 static int twl6030smps_set_voltage_sel(struct regulator_dev *rdev,
 819                                        unsigned int selector)
 820 {
 821         struct twlreg_info *info = rdev_get_drvdata(rdev);
 822
 823         return twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_VOLTAGE_SMPS,
 824                             selector);
 825 }
 826
 827 static int twl6030smps_get_voltage_sel(struct regulator_dev *rdev)
 828 {
 829         struct twlreg_info      *info = rdev_get_drvdata(rdev);
 830
 831         return twlreg_read(info, TWL_MODULE_PM_RECEIVER, VREG_VOLTAGE_SMPS);
 832 }
 833
 834 static struct regulator_ops twlsmps_ops = {
 835         .list_voltage           = twl6030smps_list_voltage,
 836         .map_voltage            = twl6030smps_map_voltage,
 837
 838         .set_voltage_sel        = twl6030smps_set_voltage_sel,
 839         .get_voltage_sel        = twl6030smps_get_voltage_sel,
 840
 841         .enable                 = twl6030reg_enable,
 842         .disable                = twl6030reg_disable,
 843         .is_enabled             = twl6030reg_is_enabled,
 844
 845         .set_mode               = twl6030reg_set_mode,
 846
 847         .get_status             = twl6030reg_get_status,
 848 };
 849
 850 /*----------------------------------------------------------------------*/
 851
 852 #define TWL4030_FIXED_LDO(label, offset, mVolts, num, turnon_delay, \
 853                         remap_conf) \
 854                 TWL_FIXED_LDO(label, offset, mVolts, num, turnon_delay, \
 855                         remap_conf, TWL4030, twl4030fixed_ops)
 856 #define TWL6030_FIXED_LDO(label, offset, mVolts, turnon_delay) \
 857                 TWL_FIXED_LDO(label, offset, mVolts, 0x0, turnon_delay, \
 858                         0x0, TWL6030, twl6030fixed_ops)
 859
 860 #define TWL4030_ADJUSTABLE_LDO(label, offset, num, turnon_delay, remap_conf) \
 861 static const struct twlreg_info TWL4030_INFO_##label = { \
 862         .base = offset, \
 863         .id = num, \
 864         .table_len = ARRAY_SIZE(label##_VSEL_table), \
 865         .table = label##_VSEL_table, \
 866         .remap = remap_conf, \
 867         .desc = { \
 868                 .name = #label, \
 869                 .id = TWL4030_REG_##label, \
 870                 .n_voltages = ARRAY_SIZE(label##_VSEL_table), \
 871                 .ops = &twl4030ldo_ops, \
 872                 .type = REGULATOR_VOLTAGE, \
 873                 .owner = THIS_MODULE, \
 874                 .enable_time = turnon_delay, \
 875                 }, \
 876         }
 877
 878 #define TWL4030_ADJUSTABLE_SMPS(label, offset, num, turnon_delay, remap_conf) \
 879 static const struct twlreg_info TWL4030_INFO_##label = { \
 880         .base = offset, \
 881         .id = num, \
 882         .remap = remap_conf, \
 883         .desc = { \
 884                 .name = #label, \
 885                 .id = TWL4030_REG_##label, \
 886                 .ops = &twl4030smps_ops, \
 887                 .type = REGULATOR_VOLTAGE, \
 888                 .owner = THIS_MODULE, \
 889                 .enable_time = turnon_delay, \
 890                 }, \
 891         }
 892
 893 #define TWL6030_ADJUSTABLE_SMPS(label) \
 894 static const struct twlreg_info TWL6030_INFO_##label = { \
 895         .desc = { \
 896                 .name = #label, \
 897                 .id = TWL6030_REG_##label, \
 898                 .ops = &twl6030coresmps_ops, \
 899                 .type = REGULATOR_VOLTAGE, \
 900                 .owner = THIS_MODULE, \
 901                 }, \
 902         }
 903
 904 #define TWL6030_ADJUSTABLE_LDO(label, offset, min_mVolts, max_mVolts) \
 905 static const struct twlreg_info TWL6030_INFO_##label = { \
 906         .base = offset, \
 907         .min_mV = min_mVolts, \
 908         .max_mV = max_mVolts, \
 909         .desc = { \
 910                 .name = #label, \
 911                 .id = TWL6030_REG_##label, \
 912                 .n_voltages = 32, \
 913                 .ops = &twl6030ldo_ops, \
 914                 .type = REGULATOR_VOLTAGE, \
 915                 .owner = THIS_MODULE, \
 916                 }, \
 917         }
 918
 919 #define TWL6025_ADJUSTABLE_LDO(label, offset, min_mVolts, max_mVolts) \
 920 static const struct twlreg_info TWL6025_INFO_##label = { \
 921         .base = offset, \
 922         .min_mV = min_mVolts, \
 923         .max_mV = max_mVolts, \
 924         .desc = { \
 925                 .name = #label, \
 926                 .id = TWL6025_REG_##label, \
 927                 .n_voltages = 32, \
 928                 .ops = &twl6030ldo_ops, \
 929                 .type = REGULATOR_VOLTAGE, \
 930                 .owner = THIS_MODULE, \
 931                 }, \
 932         }
 933
 934 #define TWL_FIXED_LDO(label, offset, mVolts, num, turnon_delay, remap_conf, \
 935                 family, operations) \
 936 static const struct twlreg_info TWLFIXED_INFO_##label = { \
 937         .base = offset, \
 938         .id = num, \
 939         .min_mV = mVolts, \
 940         .remap = remap_conf, \
 941         .desc = { \
 942                 .name = #label, \
 943                 .id = family##_REG_##label, \
 944                 .n_voltages = 1, \
 945                 .ops = &operations, \
 946                 .type = REGULATOR_VOLTAGE, \
 947                 .owner = THIS_MODULE, \
 948                 .enable_time = turnon_delay, \
 949                 }, \
 950         }
 951
 952 #define TWL6030_FIXED_RESOURCE(label, offset, turnon_delay) \
 953 static struct twlreg_info TWLRES_INFO_##label = { \
 954         .base = offset, \
 955         .desc = { \
 956                 .name = #label, \
 957                 .id = TWL6030_REG_##label, \
 958                 .ops = &twl6030_fixed_resource, \
 959                 .type = REGULATOR_VOLTAGE, \
 960                 .owner = THIS_MODULE, \
 961                 .enable_time = turnon_delay, \
 962                 }, \
 963         }
 964
 965 #define TWL6025_ADJUSTABLE_SMPS(label, offset) \
 966 static const struct twlreg_info TWLSMPS_INFO_##label = { \
 967         .base = offset, \
 968         .min_mV = 600, \
 969         .max_mV = 2100, \
 970         .desc = { \
 971                 .name = #label, \
 972                 .id = TWL6025_REG_##label, \
 973                 .n_voltages = 63, \
 974                 .ops = &twlsmps_ops, \
 975                 .type = REGULATOR_VOLTAGE, \
 976                 .owner = THIS_MODULE, \
 977                 }, \
 978         }
 979
 980 /*
 981  * We list regulators here if systems need some level of
 982  * software control over them after boot.
 983  */
 984 TWL4030_ADJUSTABLE_LDO(VAUX1, 0x17, 1, 100, 0x08);
 985 TWL4030_ADJUSTABLE_LDO(VAUX2_4030, 0x1b, 2, 100, 0x08);
 986 TWL4030_ADJUSTABLE_LDO(VAUX2, 0x1b, 2, 100, 0x08);
 987 TWL4030_ADJUSTABLE_LDO(VAUX3, 0x1f, 3, 100, 0x08);
 988 TWL4030_ADJUSTABLE_LDO(VAUX4, 0x23, 4, 100, 0x08);
 989 TWL4030_ADJUSTABLE_LDO(VMMC1, 0x27, 5, 100, 0x08);
 990 TWL4030_ADJUSTABLE_LDO(VMMC2, 0x2b, 6, 100, 0x08);
 991 TWL4030_ADJUSTABLE_LDO(VPLL1, 0x2f, 7, 100, 0x00);
 992 TWL4030_ADJUSTABLE_LDO(VPLL2, 0x33, 8, 100, 0x08);
 993 TWL4030_ADJUSTABLE_LDO(VSIM, 0x37, 9, 100, 0x00);
 994 TWL4030_ADJUSTABLE_LDO(VDAC, 0x3b, 10, 100, 0x08);
 995 TWL4030_ADJUSTABLE_LDO(VINTANA2, 0x43, 12, 100, 0x08);
 996 TWL4030_ADJUSTABLE_LDO(VIO, 0x4b, 14, 1000, 0x08);
 997 TWL4030_ADJUSTABLE_SMPS(VDD1, 0x55, 15, 1000, 0x08);
 998 TWL4030_ADJUSTABLE_SMPS(VDD2, 0x63, 16, 1000, 0x08);
 999 /* VUSBCP is managed *only* by the USB subchip */
1000 /* 6030 REG with base as PMC Slave Misc : 0x0030 */
1001 /* Turnon-delay and remap configuration values for 6030 are not
1002    verified since the specification is not public */
1003 TWL6030_ADJUSTABLE_SMPS(VDD1);
1004 TWL6030_ADJUSTABLE_SMPS(VDD2);
1005 TWL6030_ADJUSTABLE_SMPS(VDD3);
1006 TWL6030_ADJUSTABLE_LDO(VAUX1_6030, 0x54, 1000, 3300);
1007 TWL6030_ADJUSTABLE_LDO(VAUX2_6030, 0x58, 1000, 3300);
1008 TWL6030_ADJUSTABLE_LDO(VAUX3_6030, 0x5c, 1000, 3300);
1009 TWL6030_ADJUSTABLE_LDO(VMMC, 0x68, 1000, 3300);
1010 TWL6030_ADJUSTABLE_LDO(VPP, 0x6c, 1000, 3300);
1011 TWL6030_ADJUSTABLE_LDO(VUSIM, 0x74, 1000, 3300);
1012 /* 6025 are renamed compared to 6030 versions */
1013 TWL6025_ADJUSTABLE_LDO(LDO2, 0x54, 1000, 3300);
1014 TWL6025_ADJUSTABLE_LDO(LDO4, 0x58, 1000, 3300);
1015 TWL6025_ADJUSTABLE_LDO(LDO3, 0x5c, 1000, 3300);
1016 TWL6025_ADJUSTABLE_LDO(LDO5, 0x68, 1000, 3300);
1017 TWL6025_ADJUSTABLE_LDO(LDO1, 0x6c, 1000, 3300);
1018 TWL6025_ADJUSTABLE_LDO(LDO7, 0x74, 1000, 3300);
1019 TWL6025_ADJUSTABLE_LDO(LDO6, 0x60, 1000, 3300);
1020 TWL6025_ADJUSTABLE_LDO(LDOLN, 0x64, 1000, 3300);
1021 TWL6025_ADJUSTABLE_LDO(LDOUSB, 0x70, 1000, 3300);
1022 TWL4030_FIXED_LDO(VINTANA1, 0x3f, 1500, 11, 100, 0x08);
1023 TWL4030_FIXED_LDO(VINTDIG, 0x47, 1500, 13, 100, 0x08);
1024 TWL4030_FIXED_LDO(VUSB1V5, 0x71, 1500, 17, 100, 0x08);
1025 TWL4030_FIXED_LDO(VUSB1V8, 0x74, 1800, 18, 100, 0x08);
1026 TWL4030_FIXED_LDO(VUSB3V1, 0x77, 3100, 19, 150, 0x08);
1027 TWL6030_FIXED_LDO(VANA, 0x50, 2100, 0);
1028 TWL6030_FIXED_LDO(VCXIO, 0x60, 1800, 0);
1029 TWL6030_FIXED_LDO(VDAC, 0x64, 1800, 0);
1030 TWL6030_FIXED_LDO(VUSB, 0x70, 3300, 0);
1031 TWL6030_FIXED_LDO(V1V8, 0x16, 1800, 0);
1032 TWL6030_FIXED_LDO(V2V1, 0x1c, 2100, 0);
1033 TWL6025_ADJUSTABLE_SMPS(SMPS3, 0x34);
1034 TWL6025_ADJUSTABLE_SMPS(SMPS4, 0x10);
1035 TWL6025_ADJUSTABLE_SMPS(VIO, 0x16);
1036
1037 static u8 twl_get_smps_offset(void)
1038 {
1039         u8 value;
1040
1041         twl_i2c_read_u8(TWL_MODULE_PM_RECEIVER, &value,
1042                         TWL6030_SMPS_OFFSET);
1043         return value;
1044 }
1045
1046 static u8 twl_get_smps_mult(void)
1047 {
1048         u8 value;
1049
1050         twl_i2c_read_u8(TWL_MODULE_PM_RECEIVER, &value,
1051                         TWL6030_SMPS_MULT);
1052         return value;
1053 }
1054
1055 #define TWL_OF_MATCH(comp, family, label) \
1056         { \
1057                 .compatible = comp, \
1058                 .data = &family##_INFO_##label, \
1059         }
1060
1061 #define TWL4030_OF_MATCH(comp, label) TWL_OF_MATCH(comp, TWL4030, label)
1062 #define TWL6030_OF_MATCH(comp, label) TWL_OF_MATCH(comp, TWL6030, label)
1063 #define TWL6025_OF_MATCH(comp, label) TWL_OF_MATCH(comp, TWL6025, label)
1064 #define TWLFIXED_OF_MATCH(comp, label) TWL_OF_MATCH(comp, TWLFIXED, label)
1065 #define TWLSMPS_OF_MATCH(comp, label) TWL_OF_MATCH(comp, TWLSMPS, label)
1066
1067 static const struct of_device_id twl_of_match[] __devinitconst = {
1068         TWL4030_OF_MATCH("ti,twl4030-vaux1", VAUX1),
1069         TWL4030_OF_MATCH("ti,twl4030-vaux2", VAUX2_4030),
1070         TWL4030_OF_MATCH("ti,twl5030-vaux2", VAUX2),
1071         TWL4030_OF_MATCH("ti,twl4030-vaux3", VAUX3),
1072         TWL4030_OF_MATCH("ti,twl4030-vaux4", VAUX4),
1073         TWL4030_OF_MATCH("ti,twl4030-vmmc1", VMMC1),
1074         TWL4030_OF_MATCH("ti,twl4030-vmmc2", VMMC2),
1075         TWL4030_OF_MATCH("ti,twl4030-vpll1", VPLL1),
1076         TWL4030_OF_MATCH("ti,twl4030-vpll2", VPLL2),
1077         TWL4030_OF_MATCH("ti,twl4030-vsim", VSIM),
1078         TWL4030_OF_MATCH("ti,twl4030-vdac", VDAC),
1079         TWL4030_OF_MATCH("ti,twl4030-vintana2", VINTANA2),
1080         TWL4030_OF_MATCH("ti,twl4030-vio", VIO),
1081         TWL4030_OF_MATCH("ti,twl4030-vdd1", VDD1),
1082         TWL4030_OF_MATCH("ti,twl4030-vdd2", VDD2),
1083         TWL6030_OF_MATCH("ti,twl6030-vdd1", VDD1),
1084         TWL6030_OF_MATCH("ti,twl6030-vdd2", VDD2),
1085         TWL6030_OF_MATCH("ti,twl6030-vdd3", VDD3),
1086         TWL6030_OF_MATCH("ti,twl6030-vaux1", VAUX1_6030),
1087         TWL6030_OF_MATCH("ti,twl6030-vaux2", VAUX2_6030),
1088         TWL6030_OF_MATCH("ti,twl6030-vaux3", VAUX3_6030),
1089         TWL6030_OF_MATCH("ti,twl6030-vmmc", VMMC),
1090         TWL6030_OF_MATCH("ti,twl6030-vpp", VPP),
1091         TWL6030_OF_MATCH("ti,twl6030-vusim", VUSIM),
1092         TWL6025_OF_MATCH("ti,twl6025-ldo2", LDO2),
1093         TWL6025_OF_MATCH("ti,twl6025-ldo4", LDO4),
1094         TWL6025_OF_MATCH("ti,twl6025-ldo3", LDO3),
1095         TWL6025_OF_MATCH("ti,twl6025-ldo5", LDO5),
1096         TWL6025_OF_MATCH("ti,twl6025-ldo1", LDO1),
1097         TWL6025_OF_MATCH("ti,twl6025-ldo7", LDO7),
1098         TWL6025_OF_MATCH("ti,twl6025-ldo6", LDO6),
1099         TWL6025_OF_MATCH("ti,twl6025-ldoln", LDOLN),
1100         TWL6025_OF_MATCH("ti,twl6025-ldousb", LDOUSB),
1101         TWLFIXED_OF_MATCH("ti,twl4030-vintana1", VINTANA1),
1102         TWLFIXED_OF_MATCH("ti,twl4030-vintdig", VINTDIG),
1103         TWLFIXED_OF_MATCH("ti,twl4030-vusb1v5", VUSB1V5),
1104         TWLFIXED_OF_MATCH("ti,twl4030-vusb1v8", VUSB1V8),
1105         TWLFIXED_OF_MATCH("ti,twl4030-vusb3v1", VUSB3V1),
1106         TWLFIXED_OF_MATCH("ti,twl6030-vana", VANA),
1107         TWLFIXED_OF_MATCH("ti,twl6030-vcxio", VCXIO),
1108         TWLFIXED_OF_MATCH("ti,twl6030-vdac", VDAC),
1109         TWLFIXED_OF_MATCH("ti,twl6030-vusb", VUSB),
1110         TWLFIXED_OF_MATCH("ti,twl6030-v1v8", V1V8),
1111         TWLFIXED_OF_MATCH("ti,twl6030-v2v1", V2V1),
1112         TWLSMPS_OF_MATCH("ti,twl6025-smps3", SMPS3),
1113         TWLSMPS_OF_MATCH("ti,twl6025-smps4", SMPS4),
1114         TWLSMPS_OF_MATCH("ti,twl6025-vio", VIO),
1115         {},
1116 };
1117 MODULE_DEVICE_TABLE(of, twl_of_match);
1118
1119 static int twlreg_probe(struct platform_device *pdev)
1120 {
1121         int                             i, id;
1122         struct twlreg_info              *info;
1123         const struct twlreg_info        *template;
1124         struct regulator_init_data      *initdata;
1125         struct regulation_constraints   *c;
1126         struct regulator_dev            *rdev;
1127         struct twl_regulator_driver_data        *drvdata;
1128         const struct of_device_id       *match;
1129         struct regulator_config         config = { };
1130
1131         match = of_match_device(twl_of_match, &pdev->dev);
1132         if (match) {
1133                 template = match->data;
1134                 id = template->desc.id;
1135                 initdata = of_get_regulator_init_data(&pdev->dev,
1136                                                       pdev->dev.of_node);
1137                 drvdata = NULL;
1138         } else {
1139                 id = pdev->id;
1140                 initdata = pdev->dev.platform_data;
1141                 for (i = 0, template = NULL; i < ARRAY_SIZE(twl_of_match); i++) {
1142                         template = twl_of_match[i].data;
1143                         if (template && template->desc.id == id)
1144                                 break;
1145                 }
1146                 if (i == ARRAY_SIZE(twl_of_match))
1147                         return -ENODEV;
1148
1149                 drvdata = initdata->driver_data;
1150                 if (!drvdata)
1151                         return -EINVAL;
1152         }
1153
1154         if (!template)
1155                 return -ENODEV;
1156
1157         if (!initdata)
1158                 return -EINVAL;
1159
1160         info = kmemdup(template, sizeof (*info), GFP_KERNEL);
1161         if (!info)
1162                 return -ENOMEM;
1163
1164         if (drvdata) {
1165                 /* copy the driver data into regulator data */
1166                 info->features = drvdata->features;
1167                 info->data = drvdata->data;
1168                 info->set_voltage = drvdata->set_voltage;
1169                 info->get_voltage = drvdata->get_voltage;
1170         }
1171
1172         /* Constrain board-specific capabilities according to what
1173          * this driver and the chip itself can actually do.
1174          */
1175         c = &initdata->constraints;
1176         c->valid_modes_mask &= REGULATOR_MODE_NORMAL | REGULATOR_MODE_STANDBY;
1177         c->valid_ops_mask &= REGULATOR_CHANGE_VOLTAGE
1178                                 | REGULATOR_CHANGE_MODE
1179                                 | REGULATOR_CHANGE_STATUS;
1180         switch (id) {
1181         case TWL4030_REG_VIO:
1182         case TWL4030_REG_VDD1:
1183         case TWL4030_REG_VDD2:
1184         case TWL4030_REG_VPLL1:
1185         case TWL4030_REG_VINTANA1:
1186         case TWL4030_REG_VINTANA2:
1187         case TWL4030_REG_VINTDIG:
1188                 c->always_on = true;
1189                 break;
1190         default:
1191                 break;
1192         }
1193
1194         switch (id) {
1195         case TWL6025_REG_SMPS3:
1196                 if (twl_get_smps_mult() & SMPS_MULTOFFSET_SMPS3)
1197                         info->flags |= SMPS_EXTENDED_EN;
1198                 if (twl_get_smps_offset() & SMPS_MULTOFFSET_SMPS3)
1199                         info->flags |= SMPS_OFFSET_EN;
1200                 break;
1201         case TWL6025_REG_SMPS4:
1202                 if (twl_get_smps_mult() & SMPS_MULTOFFSET_SMPS4)
1203                         info->flags |= SMPS_EXTENDED_EN;
1204                 if (twl_get_smps_offset() & SMPS_MULTOFFSET_SMPS4)
1205                         info->flags |= SMPS_OFFSET_EN;
1206                 break;
1207         case TWL6025_REG_VIO:
1208                 if (twl_get_smps_mult() & SMPS_MULTOFFSET_VIO)
1209                         info->flags |= SMPS_EXTENDED_EN;
1210                 if (twl_get_smps_offset() & SMPS_MULTOFFSET_VIO)
1211                         info->flags |= SMPS_OFFSET_EN;
1212                 break;
1213         }
1214
1215         config.dev = &pdev->dev;
1216         config.init_data = initdata;
1217         config.driver_data = info;
1218         config.of_node = pdev->dev.of_node;
1219
1220         rdev = regulator_register(&info->desc, &config);
1221         if (IS_ERR(rdev)) {
1222                 dev_err(&pdev->dev, "can't register %s, %ld\n",
1223                                 info->desc.name, PTR_ERR(rdev));
1224                 kfree(info);
1225                 return PTR_ERR(rdev);
1226         }
1227         platform_set_drvdata(pdev, rdev);
1228
1229         if (twl_class_is_4030())
1230                 twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_REMAP,
1231                                                 info->remap);
1232
1233         /* NOTE:  many regulators support short-circuit IRQs (presentable
1234          * as REGULATOR_OVER_CURRENT notifications?) configured via:
1235          *  - SC_CONFIG
1236          *  - SC_DETECT1 (vintana2, vmmc1/2, vaux1/2/3/4)
1237          *  - SC_DETECT2 (vusb, vdac, vio, vdd1/2, vpll2)
1238          *  - IT_CONFIG
1239          */
1240
1241         return 0;
1242 }
1243
1244 static int twlreg_remove(struct platform_device *pdev)
1245 {
1246         struct regulator_dev *rdev = platform_get_drvdata(pdev);
1247         struct twlreg_info *info = rdev->reg_data;
1248
1249         regulator_unregister(rdev);
1250         kfree(info);
1251         return 0;
1252 }
1253
1254 MODULE_ALIAS("platform:twl_reg");
1255
1256 static struct platform_driver twlreg_driver = {
1257         .probe          = twlreg_probe,
1258         .remove         = twlreg_remove,
1259         /* NOTE: short name, to work around driver model truncation of
1260          * "twl_regulator.12" (and friends) to "twl_regulator.1".
1261          */
1262         .driver  = {
1263                 .name  = "twl_reg",
1264                 .owner = THIS_MODULE,
1265                 .of_match_table = of_match_ptr(twl_of_match),
1266         },
1267 };
1268
1269 static int __init twlreg_init(void)
1270 {
1271         return platform_driver_register(&twlreg_driver);
1272 }
1273 subsys_initcall(twlreg_init);
1274
1275 static void __exit twlreg_exit(void)
1276 {
1277         platform_driver_unregister(&twlreg_driver);
1278 }
1279 module_exit(twlreg_exit)
1280
1281 MODULE_DESCRIPTION("TWL regulator driver");
1282 MODULE_LICENSE("GPL");