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