drivers/regulator/tps65910-regulator.c

   1 /*
   2  * tps65910.c  --  TI tps65910
   3  *
   4  * Copyright 2010 Texas Instruments Inc.
   5  *
   6  * Author: Graeme Gregory <gg@slimlogic.co.uk>
   7  * Author: Jorge Eduardo Candelaria <jedu@slimlogic.co.uk>
   8  *
   9  *  This program is free software; you can redistribute it and/or modify it
  10  *  under  the terms of the GNU General  Public License as published by the
  11  *  Free Software Foundation;  either version 2 of the License, or (at your
  12  *  option) any later version.
  13  *
  14  */
  15
  16 #include <linux/kernel.h>
  17 #include <linux/module.h>
  18 #include <linux/init.h>
  19 #include <linux/err.h>
  20 #include <linux/platform_device.h>
  21 #include <linux/regulator/driver.h>
  22 #include <linux/regulator/machine.h>
  23 #include <linux/delay.h>
  24 #include <linux/slab.h>
  25 #include <linux/gpio.h>
  26 #include <linux/mfd/tps65910.h>
  27
  28 #define TPS65910_SUPPLY_STATE_ENABLED   0x1
  29 #define EXT_SLEEP_CONTROL (TPS65910_SLEEP_CONTROL_EXT_INPUT_EN1 |       \
  30                         TPS65910_SLEEP_CONTROL_EXT_INPUT_EN2 |          \
  31                         TPS65910_SLEEP_CONTROL_EXT_INPUT_EN3 |          \
  32                         TPS65911_SLEEP_CONTROL_EXT_INPUT_SLEEP)
  33
  34 /* supported VIO voltages in milivolts */
  35 static const u16 VIO_VSEL_table[] = {
  36         1500, 1800, 2500, 3300,
  37 };
  38
  39 /* VSEL tables for TPS65910 specific LDOs and dcdc's */
  40
  41 /* supported VDD3 voltages in milivolts */
  42 static const u16 VDD3_VSEL_table[] = {
  43         5000,
  44 };
  45
  46 /* supported VDIG1 voltages in milivolts */
  47 static const u16 VDIG1_VSEL_table[] = {
  48         1200, 1500, 1800, 2700,
  49 };
  50
  51 /* supported VDIG2 voltages in milivolts */
  52 static const u16 VDIG2_VSEL_table[] = {
  53         1000, 1100, 1200, 1800,
  54 };
  55
  56 /* supported VPLL voltages in milivolts */
  57 static const u16 VPLL_VSEL_table[] = {
  58         1000, 1100, 1800, 2500,
  59 };
  60
  61 /* supported VDAC voltages in milivolts */
  62 static const u16 VDAC_VSEL_table[] = {
  63         1800, 2600, 2800, 2850,
  64 };
  65
  66 /* supported VAUX1 voltages in milivolts */
  67 static const u16 VAUX1_VSEL_table[] = {
  68         1800, 2500, 2800, 2850,
  69 };
  70
  71 /* supported VAUX2 voltages in milivolts */
  72 static const u16 VAUX2_VSEL_table[] = {
  73         1800, 2800, 2900, 3300,
  74 };
  75
  76 /* supported VAUX33 voltages in milivolts */
  77 static const u16 VAUX33_VSEL_table[] = {
  78         1800, 2000, 2800, 3300,
  79 };
  80
  81 /* supported VMMC voltages in milivolts */
  82 static const u16 VMMC_VSEL_table[] = {
  83         1800, 2800, 3000, 3300,
  84 };
  85
  86 struct tps_info {
  87         const char *name;
  88         unsigned min_uV;
  89         unsigned max_uV;
  90         u8 n_voltages;
  91         const u16 *voltage_table;
  92         int enable_time_us;
  93 };
  94
  95 static struct tps_info tps65910_regs[] = {
  96         {
  97                 .name = "VRTC",
  98                 .enable_time_us = 2200,
  99         },
 100         {
 101                 .name = "VIO",
 102                 .min_uV = 1500000,
 103                 .max_uV = 3300000,
 104                 .n_voltages = ARRAY_SIZE(VIO_VSEL_table),
 105                 .voltage_table = VIO_VSEL_table,
 106                 .enable_time_us = 350,
 107         },
 108         {
 109                 .name = "VDD1",
 110                 .min_uV = 600000,
 111                 .max_uV = 4500000,
 112                 .enable_time_us = 350,
 113         },
 114         {
 115                 .name = "VDD2",
 116                 .min_uV = 600000,
 117                 .max_uV = 4500000,
 118                 .enable_time_us = 350,
 119         },
 120         {
 121                 .name = "VDD3",
 122                 .min_uV = 5000000,
 123                 .max_uV = 5000000,
 124                 .n_voltages = ARRAY_SIZE(VDD3_VSEL_table),
 125                 .voltage_table = VDD3_VSEL_table,
 126                 .enable_time_us = 200,
 127         },
 128         {
 129                 .name = "VDIG1",
 130                 .min_uV = 1200000,
 131                 .max_uV = 2700000,
 132                 .n_voltages = ARRAY_SIZE(VDIG1_VSEL_table),
 133                 .voltage_table = VDIG1_VSEL_table,
 134                 .enable_time_us = 100,
 135         },
 136         {
 137                 .name = "VDIG2",
 138                 .min_uV = 1000000,
 139                 .max_uV = 1800000,
 140                 .n_voltages = ARRAY_SIZE(VDIG2_VSEL_table),
 141                 .voltage_table = VDIG2_VSEL_table,
 142                 .enable_time_us = 100,
 143         },
 144         {
 145                 .name = "VPLL",
 146                 .min_uV = 1000000,
 147                 .max_uV = 2500000,
 148                 .n_voltages = ARRAY_SIZE(VPLL_VSEL_table),
 149                 .voltage_table = VPLL_VSEL_table,
 150                 .enable_time_us = 100,
 151         },
 152         {
 153                 .name = "VDAC",
 154                 .min_uV = 1800000,
 155                 .max_uV = 2850000,
 156                 .n_voltages = ARRAY_SIZE(VDAC_VSEL_table),
 157                 .voltage_table = VDAC_VSEL_table,
 158                 .enable_time_us = 100,
 159         },
 160         {
 161                 .name = "VAUX1",
 162                 .min_uV = 1800000,
 163                 .max_uV = 2850000,
 164                 .n_voltages = ARRAY_SIZE(VAUX1_VSEL_table),
 165                 .voltage_table = VAUX1_VSEL_table,
 166                 .enable_time_us = 100,
 167         },
 168         {
 169                 .name = "VAUX2",
 170                 .min_uV = 1800000,
 171                 .max_uV = 3300000,
 172                 .n_voltages = ARRAY_SIZE(VAUX2_VSEL_table),
 173                 .voltage_table = VAUX2_VSEL_table,
 174                 .enable_time_us = 100,
 175         },
 176         {
 177                 .name = "VAUX33",
 178                 .min_uV = 1800000,
 179                 .max_uV = 3300000,
 180                 .n_voltages = ARRAY_SIZE(VAUX33_VSEL_table),
 181                 .voltage_table = VAUX33_VSEL_table,
 182                 .enable_time_us = 100,
 183         },
 184         {
 185                 .name = "VMMC",
 186                 .min_uV = 1800000,
 187                 .max_uV = 3300000,
 188                 .n_voltages = ARRAY_SIZE(VMMC_VSEL_table),
 189                 .voltage_table = VMMC_VSEL_table,
 190                 .enable_time_us = 100,
 191         },
 192 };
 193
 194 static struct tps_info tps65911_regs[] = {
 195         {
 196                 .name = "VRTC",
 197                 .enable_time_us = 2200,
 198         },
 199         {
 200                 .name = "VIO",
 201                 .min_uV = 1500000,
 202                 .max_uV = 3300000,
 203                 .n_voltages = ARRAY_SIZE(VIO_VSEL_table),
 204                 .voltage_table = VIO_VSEL_table,
 205                 .enable_time_us = 350,
 206         },
 207         {
 208                 .name = "VDD1",
 209                 .min_uV = 600000,
 210                 .max_uV = 4500000,
 211                 .n_voltages = 73,
 212                 .enable_time_us = 350,
 213         },
 214         {
 215                 .name = "VDD2",
 216                 .min_uV = 600000,
 217                 .max_uV = 4500000,
 218                 .n_voltages = 73,
 219                 .enable_time_us = 350,
 220         },
 221         {
 222                 .name = "VDDCTRL",
 223                 .min_uV = 600000,
 224                 .max_uV = 1400000,
 225                 .n_voltages = 65,
 226                 .enable_time_us = 900,
 227         },
 228         {
 229                 .name = "LDO1",
 230                 .min_uV = 1000000,
 231                 .max_uV = 3300000,
 232                 .n_voltages = 47,
 233                 .enable_time_us = 420,
 234         },
 235         {
 236                 .name = "LDO2",
 237                 .min_uV = 1000000,
 238                 .max_uV = 3300000,
 239                 .n_voltages = 47,
 240                 .enable_time_us = 420,
 241         },
 242         {
 243                 .name = "LDO3",
 244                 .min_uV = 1000000,
 245                 .max_uV = 3300000,
 246                 .n_voltages = 24,
 247                 .enable_time_us = 230,
 248         },
 249         {
 250                 .name = "LDO4",
 251                 .min_uV = 1000000,
 252                 .max_uV = 3300000,
 253                 .n_voltages = 47,
 254                 .enable_time_us = 230,
 255         },
 256         {
 257                 .name = "LDO5",
 258                 .min_uV = 1000000,
 259                 .max_uV = 3300000,
 260                 .n_voltages = 24,
 261                 .enable_time_us = 230,
 262         },
 263         {
 264                 .name = "LDO6",
 265                 .min_uV = 1000000,
 266                 .max_uV = 3300000,
 267                 .n_voltages = 24,
 268                 .enable_time_us = 230,
 269         },
 270         {
 271                 .name = "LDO7",
 272                 .min_uV = 1000000,
 273                 .max_uV = 3300000,
 274                 .n_voltages = 24,
 275                 .enable_time_us = 230,
 276         },
 277         {
 278                 .name = "LDO8",
 279                 .min_uV = 1000000,
 280                 .max_uV = 3300000,
 281                 .n_voltages = 24,
 282                 .enable_time_us = 230,
 283         },
 284 };
 285
 286 #define EXT_CONTROL_REG_BITS(id, regs_offs, bits) (((regs_offs) << 8) | (bits))
 287 static unsigned int tps65910_ext_sleep_control[] = {
 288         0,
 289         EXT_CONTROL_REG_BITS(VIO,    1, 0),
 290         EXT_CONTROL_REG_BITS(VDD1,   1, 1),
 291         EXT_CONTROL_REG_BITS(VDD2,   1, 2),
 292         EXT_CONTROL_REG_BITS(VDD3,   1, 3),
 293         EXT_CONTROL_REG_BITS(VDIG1,  0, 1),
 294         EXT_CONTROL_REG_BITS(VDIG2,  0, 2),
 295         EXT_CONTROL_REG_BITS(VPLL,   0, 6),
 296         EXT_CONTROL_REG_BITS(VDAC,   0, 7),
 297         EXT_CONTROL_REG_BITS(VAUX1,  0, 3),
 298         EXT_CONTROL_REG_BITS(VAUX2,  0, 4),
 299         EXT_CONTROL_REG_BITS(VAUX33, 0, 5),
 300         EXT_CONTROL_REG_BITS(VMMC,   0, 0),
 301 };
 302
 303 static unsigned int tps65911_ext_sleep_control[] = {
 304         0,
 305         EXT_CONTROL_REG_BITS(VIO,     1, 0),
 306         EXT_CONTROL_REG_BITS(VDD1,    1, 1),
 307         EXT_CONTROL_REG_BITS(VDD2,    1, 2),
 308         EXT_CONTROL_REG_BITS(VDDCTRL, 1, 3),
 309         EXT_CONTROL_REG_BITS(LDO1,    0, 1),
 310         EXT_CONTROL_REG_BITS(LDO2,    0, 2),
 311         EXT_CONTROL_REG_BITS(LDO3,    0, 7),
 312         EXT_CONTROL_REG_BITS(LDO4,    0, 6),
 313         EXT_CONTROL_REG_BITS(LDO5,    0, 3),
 314         EXT_CONTROL_REG_BITS(LDO6,    0, 0),
 315         EXT_CONTROL_REG_BITS(LDO7,    0, 5),
 316         EXT_CONTROL_REG_BITS(LDO8,    0, 4),
 317 };
 318
 319 struct tps65910_reg {
 320         struct regulator_desc *desc;
 321         struct tps65910 *mfd;
 322         struct regulator_dev **rdev;
 323         struct tps_info **info;
 324         struct mutex mutex;
 325         int num_regulators;
 326         int mode;
 327         int  (*get_ctrl_reg)(int);
 328         unsigned int *ext_sleep_control;
 329         unsigned int board_ext_control[TPS65910_NUM_REGS];
 330 };
 331
 332 static inline int tps65910_read(struct tps65910_reg *pmic, u8 reg)
 333 {
 334         u8 val;
 335         int err;
 336
 337         err = pmic->mfd->read(pmic->mfd, reg, 1, &val);
 338         if (err)
 339                 return err;
 340
 341         return val;
 342 }
 343
 344 static inline int tps65910_write(struct tps65910_reg *pmic, u8 reg, u8 val)
 345 {
 346         return pmic->mfd->write(pmic->mfd, reg, 1, &val);
 347 }
 348
 349 static int tps65910_modify_bits(struct tps65910_reg *pmic, u8 reg,
 350                                         u8 set_mask, u8 clear_mask)
 351 {
 352         int err, data;
 353
 354         mutex_lock(&pmic->mutex);
 355
 356         data = tps65910_read(pmic, reg);
 357         if (data < 0) {
 358                 dev_err(pmic->mfd->dev, "Read from reg 0x%x failed\n", reg);
 359                 err = data;
 360                 goto out;
 361         }
 362
 363         data &= ~clear_mask;
 364         data |= set_mask;
 365         err = tps65910_write(pmic, reg, data);
 366         if (err)
 367                 dev_err(pmic->mfd->dev, "Write for reg 0x%x failed\n", reg);
 368
 369 out:
 370         mutex_unlock(&pmic->mutex);
 371         return err;
 372 }
 373
 374 static int tps65910_reg_read(struct tps65910_reg *pmic, u8 reg)
 375 {
 376         int data;
 377
 378         mutex_lock(&pmic->mutex);
 379
 380         data = tps65910_read(pmic, reg);
 381         if (data < 0)
 382                 dev_err(pmic->mfd->dev, "Read from reg 0x%x failed\n", reg);
 383
 384         mutex_unlock(&pmic->mutex);
 385         return data;
 386 }
 387
 388 static int tps65910_reg_write(struct tps65910_reg *pmic, u8 reg, u8 val)
 389 {
 390         int err;
 391
 392         mutex_lock(&pmic->mutex);
 393
 394         err = tps65910_write(pmic, reg, val);
 395         if (err < 0)
 396                 dev_err(pmic->mfd->dev, "Write for reg 0x%x failed\n", reg);
 397
 398         mutex_unlock(&pmic->mutex);
 399         return err;
 400 }
 401
 402 static int tps65910_get_ctrl_register(int id)
 403 {
 404         switch (id) {
 405         case TPS65910_REG_VRTC:
 406                 return TPS65910_VRTC;
 407         case TPS65910_REG_VIO:
 408                 return TPS65910_VIO;
 409         case TPS65910_REG_VDD1:
 410                 return TPS65910_VDD1;
 411         case TPS65910_REG_VDD2:
 412                 return TPS65910_VDD2;
 413         case TPS65910_REG_VDD3:
 414                 return TPS65910_VDD3;
 415         case TPS65910_REG_VDIG1:
 416                 return TPS65910_VDIG1;
 417         case TPS65910_REG_VDIG2:
 418                 return TPS65910_VDIG2;
 419         case TPS65910_REG_VPLL:
 420                 return TPS65910_VPLL;
 421         case TPS65910_REG_VDAC:
 422                 return TPS65910_VDAC;
 423         case TPS65910_REG_VAUX1:
 424                 return TPS65910_VAUX1;
 425         case TPS65910_REG_VAUX2:
 426                 return TPS65910_VAUX2;
 427         case TPS65910_REG_VAUX33:
 428                 return TPS65910_VAUX33;
 429         case TPS65910_REG_VMMC:
 430                 return TPS65910_VMMC;
 431         default:
 432                 return -EINVAL;
 433         }
 434 }
 435
 436 static int tps65911_get_ctrl_register(int id)
 437 {
 438         switch (id) {
 439         case TPS65910_REG_VRTC:
 440                 return TPS65910_VRTC;
 441         case TPS65910_REG_VIO:
 442                 return TPS65910_VIO;
 443         case TPS65910_REG_VDD1:
 444                 return TPS65910_VDD1;
 445         case TPS65910_REG_VDD2:
 446                 return TPS65910_VDD2;
 447         case TPS65911_REG_VDDCTRL:
 448                 return TPS65911_VDDCTRL;
 449         case TPS65911_REG_LDO1:
 450                 return TPS65911_LDO1;
 451         case TPS65911_REG_LDO2:
 452                 return TPS65911_LDO2;
 453         case TPS65911_REG_LDO3:
 454                 return TPS65911_LDO3;
 455         case TPS65911_REG_LDO4:
 456                 return TPS65911_LDO4;
 457         case TPS65911_REG_LDO5:
 458                 return TPS65911_LDO5;
 459         case TPS65911_REG_LDO6:
 460                 return TPS65911_LDO6;
 461         case TPS65911_REG_LDO7:
 462                 return TPS65911_LDO7;
 463         case TPS65911_REG_LDO8:
 464                 return TPS65911_LDO8;
 465         default:
 466                 return -EINVAL;
 467         }
 468 }
 469
 470 static int tps65910_is_enabled(struct regulator_dev *dev)
 471 {
 472         struct tps65910_reg *pmic = rdev_get_drvdata(dev);
 473         int reg, value, id = rdev_get_id(dev);
 474
 475         reg = pmic->get_ctrl_reg(id);
 476         if (reg < 0)
 477                 return reg;
 478
 479         value = tps65910_reg_read(pmic, reg);
 480         if (value < 0)
 481                 return value;
 482
 483         return value & TPS65910_SUPPLY_STATE_ENABLED;
 484 }
 485
 486 static int tps65910_enable(struct regulator_dev *dev)
 487 {
 488         struct tps65910_reg *pmic = rdev_get_drvdata(dev);
 489         struct tps65910 *mfd = pmic->mfd;
 490         int reg, id = rdev_get_id(dev);
 491
 492         reg = pmic->get_ctrl_reg(id);
 493         if (reg < 0)
 494                 return reg;
 495
 496         return tps65910_set_bits(mfd, reg, TPS65910_SUPPLY_STATE_ENABLED);
 497 }
 498
 499 static int tps65910_disable(struct regulator_dev *dev)
 500 {
 501         struct tps65910_reg *pmic = rdev_get_drvdata(dev);
 502         struct tps65910 *mfd = pmic->mfd;
 503         int reg, id = rdev_get_id(dev);
 504
 505         reg = pmic->get_ctrl_reg(id);
 506         if (reg < 0)
 507                 return reg;
 508
 509         return tps65910_clear_bits(mfd, reg, TPS65910_SUPPLY_STATE_ENABLED);
 510 }
 511
 512 static int tps65910_enable_time(struct regulator_dev *dev)
 513 {
 514         struct tps65910_reg *pmic = rdev_get_drvdata(dev);
 515         int id = rdev_get_id(dev);
 516         return pmic->info[id]->enable_time_us;
 517 }
 518
 519 static int tps65910_set_mode(struct regulator_dev *dev, unsigned int mode)
 520 {
 521         struct tps65910_reg *pmic = rdev_get_drvdata(dev);
 522         struct tps65910 *mfd = pmic->mfd;
 523         int reg, value, id = rdev_get_id(dev);
 524
 525         reg = pmic->get_ctrl_reg(id);
 526         if (reg < 0)
 527                 return reg;
 528
 529         switch (mode) {
 530         case REGULATOR_MODE_NORMAL:
 531                 return tps65910_modify_bits(pmic, reg, LDO_ST_ON_BIT,
 532                                                         LDO_ST_MODE_BIT);
 533         case REGULATOR_MODE_IDLE:
 534                 value = LDO_ST_ON_BIT | LDO_ST_MODE_BIT;
 535                 return tps65910_set_bits(mfd, reg, value);
 536         case REGULATOR_MODE_STANDBY:
 537                 return tps65910_clear_bits(mfd, reg, LDO_ST_ON_BIT);
 538         }
 539
 540         return -EINVAL;
 541 }
 542
 543 static unsigned int tps65910_get_mode(struct regulator_dev *dev)
 544 {
 545         struct tps65910_reg *pmic = rdev_get_drvdata(dev);
 546         int reg, value, id = rdev_get_id(dev);
 547
 548         reg = pmic->get_ctrl_reg(id);
 549         if (reg < 0)
 550                 return reg;
 551
 552         value = tps65910_reg_read(pmic, reg);
 553         if (value < 0)
 554                 return value;
 555
 556         if (!(value & LDO_ST_ON_BIT))
 557                 return REGULATOR_MODE_STANDBY;
 558         else if (value & LDO_ST_MODE_BIT)
 559                 return REGULATOR_MODE_IDLE;
 560         else
 561                 return REGULATOR_MODE_NORMAL;
 562 }
 563
 564 static int tps65910_get_voltage_dcdc(struct regulator_dev *dev)
 565 {
 566         struct tps65910_reg *pmic = rdev_get_drvdata(dev);
 567         int id = rdev_get_id(dev), voltage = 0;
 568         int opvsel = 0, srvsel = 0, vselmax = 0, mult = 0, sr = 0;
 569
 570         switch (id) {
 571         case TPS65910_REG_VDD1:
 572                 opvsel = tps65910_reg_read(pmic, TPS65910_VDD1_OP);
 573                 mult = tps65910_reg_read(pmic, TPS65910_VDD1);
 574                 mult = (mult & VDD1_VGAIN_SEL_MASK) >> VDD1_VGAIN_SEL_SHIFT;
 575                 srvsel = tps65910_reg_read(pmic, TPS65910_VDD1_SR);
 576                 sr = opvsel & VDD1_OP_CMD_MASK;
 577                 opvsel &= VDD1_OP_SEL_MASK;
 578                 srvsel &= VDD1_SR_SEL_MASK;
 579                 vselmax = 75;
 580                 break;
 581         case TPS65910_REG_VDD2:
 582                 opvsel = tps65910_reg_read(pmic, TPS65910_VDD2_OP);
 583                 mult = tps65910_reg_read(pmic, TPS65910_VDD2);
 584                 mult = (mult & VDD2_VGAIN_SEL_MASK) >> VDD2_VGAIN_SEL_SHIFT;
 585                 srvsel = tps65910_reg_read(pmic, TPS65910_VDD2_SR);
 586                 sr = opvsel & VDD2_OP_CMD_MASK;
 587                 opvsel &= VDD2_OP_SEL_MASK;
 588                 srvsel &= VDD2_SR_SEL_MASK;
 589                 vselmax = 75;
 590                 break;
 591         case TPS65911_REG_VDDCTRL:
 592                 opvsel = tps65910_reg_read(pmic, TPS65911_VDDCTRL_OP);
 593                 srvsel = tps65910_reg_read(pmic, TPS65911_VDDCTRL_SR);
 594                 sr = opvsel & VDDCTRL_OP_CMD_MASK;
 595                 opvsel &= VDDCTRL_OP_SEL_MASK;
 596                 srvsel &= VDDCTRL_SR_SEL_MASK;
 597                 vselmax = 64;
 598                 break;
 599         }
 600
 601         /* multiplier 0 == 1 but 2,3 normal */
 602         if (!mult)
 603                 mult=1;
 604
 605         if (sr) {
 606                 /* normalise to valid range */
 607                 if (srvsel < 3)
 608                         srvsel = 3;
 609                 if (srvsel > vselmax)
 610                         srvsel = vselmax;
 611                 srvsel -= 3;
 612
 613                 voltage = (srvsel * VDD1_2_OFFSET + VDD1_2_MIN_VOLT) * 100;
 614         } else {
 615
 616                 /* normalise to valid range*/
 617                 if (opvsel < 3)
 618                         opvsel = 3;
 619                 if (opvsel > vselmax)
 620                         opvsel = vselmax;
 621                 opvsel -= 3;
 622
 623                 voltage = (opvsel * VDD1_2_OFFSET + VDD1_2_MIN_VOLT) * 100;
 624         }
 625
 626         voltage *= mult;
 627
 628         return voltage;
 629 }
 630
 631 static int tps65910_get_voltage(struct regulator_dev *dev)
 632 {
 633         struct tps65910_reg *pmic = rdev_get_drvdata(dev);
 634         int reg, value, id = rdev_get_id(dev), voltage = 0;
 635
 636         reg = pmic->get_ctrl_reg(id);
 637         if (reg < 0)
 638                 return reg;
 639
 640         value = tps65910_reg_read(pmic, reg);
 641         if (value < 0)
 642                 return value;
 643
 644         switch (id) {
 645         case TPS65910_REG_VIO:
 646         case TPS65910_REG_VDIG1:
 647         case TPS65910_REG_VDIG2:
 648         case TPS65910_REG_VPLL:
 649         case TPS65910_REG_VDAC:
 650         case TPS65910_REG_VAUX1:
 651         case TPS65910_REG_VAUX2:
 652         case TPS65910_REG_VAUX33:
 653         case TPS65910_REG_VMMC:
 654                 value &= LDO_SEL_MASK;
 655                 value >>= LDO_SEL_SHIFT;
 656                 break;
 657         default:
 658                 return -EINVAL;
 659         }
 660
 661         voltage = pmic->info[id]->voltage_table[value] * 1000;
 662
 663         return voltage;
 664 }
 665
 666 static int tps65910_get_voltage_vdd3(struct regulator_dev *dev)
 667 {
 668         return 5 * 1000 * 1000;
 669 }
 670
 671 static int tps65911_get_voltage(struct regulator_dev *dev)
 672 {
 673         struct tps65910_reg *pmic = rdev_get_drvdata(dev);
 674         int step_mv, id = rdev_get_id(dev);
 675         u8 value, reg;
 676
 677         reg = pmic->get_ctrl_reg(id);
 678
 679         value = tps65910_reg_read(pmic, reg);
 680
 681         switch (id) {
 682         case TPS65911_REG_LDO1:
 683         case TPS65911_REG_LDO2:
 684         case TPS65911_REG_LDO4:
 685                 value &= LDO1_SEL_MASK;
 686                 value >>= LDO_SEL_SHIFT;
 687                 /* The first 5 values of the selector correspond to 1V */
 688                 if (value < 5)
 689                         value = 0;
 690                 else
 691                         value -= 4;
 692
 693                 step_mv = 50;
 694                 break;
 695         case TPS65911_REG_LDO3:
 696         case TPS65911_REG_LDO5:
 697         case TPS65911_REG_LDO6:
 698         case TPS65911_REG_LDO7:
 699         case TPS65911_REG_LDO8:
 700                 value &= LDO3_SEL_MASK;
 701                 value >>= LDO_SEL_SHIFT;
 702                 /* The first 3 values of the selector correspond to 1V */
 703                 if (value < 3)
 704                         value = 0;
 705                 else
 706                         value -= 2;
 707
 708                 step_mv = 100;
 709                 break;
 710         case TPS65910_REG_VIO:
 711                 value &= LDO_SEL_MASK;
 712                 value >>= LDO_SEL_SHIFT;
 713                 return pmic->info[id]->voltage_table[value] * 1000;
 714         default:
 715                 return -EINVAL;
 716         }
 717
 718         return (LDO_MIN_VOLT + value * step_mv) * 1000;
 719 }
 720
 721 static int tps65910_set_voltage_dcdc_sel(struct regulator_dev *dev,
 722                                          unsigned selector)
 723 {
 724         struct tps65910_reg *pmic = rdev_get_drvdata(dev);
 725         int id = rdev_get_id(dev), vsel;
 726         int dcdc_mult = 0;
 727
 728         switch (id) {
 729         case TPS65910_REG_VDD1:
 730                 dcdc_mult = (selector / VDD1_2_NUM_VOLT_FINE) + 1;
 731                 if (dcdc_mult == 1)
 732                         dcdc_mult--;
 733                 vsel = (selector % VDD1_2_NUM_VOLT_FINE) + 3;
 734
 735                 tps65910_modify_bits(pmic, TPS65910_VDD1,
 736                                 (dcdc_mult << VDD1_VGAIN_SEL_SHIFT),
 737                                                 VDD1_VGAIN_SEL_MASK);
 738                 tps65910_reg_write(pmic, TPS65910_VDD1_OP, vsel);
 739                 break;
 740         case TPS65910_REG_VDD2:
 741                 dcdc_mult = (selector / VDD1_2_NUM_VOLT_FINE) + 1;
 742                 if (dcdc_mult == 1)
 743                         dcdc_mult--;
 744                 vsel = (selector % VDD1_2_NUM_VOLT_FINE) + 3;
 745
 746                 tps65910_modify_bits(pmic, TPS65910_VDD2,
 747                                 (dcdc_mult << VDD2_VGAIN_SEL_SHIFT),
 748                                                 VDD1_VGAIN_SEL_MASK);
 749                 tps65910_reg_write(pmic, TPS65910_VDD2_OP, vsel);
 750                 break;
 751         case TPS65911_REG_VDDCTRL:
 752                 vsel = selector;
 753                 tps65910_reg_write(pmic, TPS65911_VDDCTRL_OP, vsel);
 754         }
 755
 756         return 0;
 757 }
 758
 759 static int tps65910_set_voltage_sel(struct regulator_dev *dev,
 760                                     unsigned selector)
 761 {
 762         struct tps65910_reg *pmic = rdev_get_drvdata(dev);
 763         int reg, id = rdev_get_id(dev);
 764
 765         reg = pmic->get_ctrl_reg(id);
 766         if (reg < 0)
 767                 return reg;
 768
 769         switch (id) {
 770         case TPS65910_REG_VIO:
 771         case TPS65910_REG_VDIG1:
 772         case TPS65910_REG_VDIG2:
 773         case TPS65910_REG_VPLL:
 774         case TPS65910_REG_VDAC:
 775         case TPS65910_REG_VAUX1:
 776         case TPS65910_REG_VAUX2:
 777         case TPS65910_REG_VAUX33:
 778         case TPS65910_REG_VMMC:
 779                 return tps65910_modify_bits(pmic, reg,
 780                                 (selector << LDO_SEL_SHIFT), LDO_SEL_MASK);
 781         }
 782
 783         return -EINVAL;
 784 }
 785
 786 static int tps65911_set_voltage_sel(struct regulator_dev *dev,
 787                                     unsigned selector)
 788 {
 789         struct tps65910_reg *pmic = rdev_get_drvdata(dev);
 790         int reg, id = rdev_get_id(dev);
 791
 792         reg = pmic->get_ctrl_reg(id);
 793         if (reg < 0)
 794                 return reg;
 795
 796         switch (id) {
 797         case TPS65911_REG_LDO1:
 798         case TPS65911_REG_LDO2:
 799         case TPS65911_REG_LDO4:
 800                 return tps65910_modify_bits(pmic, reg,
 801                                 (selector << LDO_SEL_SHIFT), LDO1_SEL_MASK);
 802         case TPS65911_REG_LDO3:
 803         case TPS65911_REG_LDO5:
 804         case TPS65911_REG_LDO6:
 805         case TPS65911_REG_LDO7:
 806         case TPS65911_REG_LDO8:
 807                 return tps65910_modify_bits(pmic, reg,
 808                                 (selector << LDO_SEL_SHIFT), LDO3_SEL_MASK);
 809         case TPS65910_REG_VIO:
 810                 return tps65910_modify_bits(pmic, reg,
 811                                 (selector << LDO_SEL_SHIFT), LDO_SEL_MASK);
 812         }
 813
 814         return -EINVAL;
 815 }
 816
 817
 818 static int tps65910_list_voltage_dcdc(struct regulator_dev *dev,
 819                                         unsigned selector)
 820 {
 821         int volt, mult = 1, id = rdev_get_id(dev);
 822
 823         switch (id) {
 824         case TPS65910_REG_VDD1:
 825         case TPS65910_REG_VDD2:
 826                 mult = (selector / VDD1_2_NUM_VOLT_FINE) + 1;
 827                 volt = VDD1_2_MIN_VOLT +
 828                                 (selector % VDD1_2_NUM_VOLT_FINE) * VDD1_2_OFFSET;
 829                 break;
 830         case TPS65911_REG_VDDCTRL:
 831                 volt = VDDCTRL_MIN_VOLT + (selector * VDDCTRL_OFFSET);
 832                 break;
 833         default:
 834                 BUG();
 835                 return -EINVAL;
 836         }
 837
 838         return  volt * 100 * mult;
 839 }
 840
 841 static int tps65910_list_voltage(struct regulator_dev *dev,
 842                                         unsigned selector)
 843 {
 844         struct tps65910_reg *pmic = rdev_get_drvdata(dev);
 845         int id = rdev_get_id(dev), voltage;
 846
 847         if (id < TPS65910_REG_VIO || id > TPS65910_REG_VMMC)
 848                 return -EINVAL;
 849
 850         if (selector >= pmic->info[id]->n_voltages)
 851                 return -EINVAL;
 852         else
 853                 voltage = pmic->info[id]->voltage_table[selector] * 1000;
 854
 855         return voltage;
 856 }
 857
 858 static int tps65911_list_voltage(struct regulator_dev *dev, unsigned selector)
 859 {
 860         struct tps65910_reg *pmic = rdev_get_drvdata(dev);
 861         int step_mv = 0, id = rdev_get_id(dev);
 862
 863         switch(id) {
 864         case TPS65911_REG_LDO1:
 865         case TPS65911_REG_LDO2:
 866         case TPS65911_REG_LDO4:
 867                 /* The first 5 values of the selector correspond to 1V */
 868                 if (selector < 5)
 869                         selector = 0;
 870                 else
 871                         selector -= 4;
 872
 873                 step_mv = 50;
 874                 break;
 875         case TPS65911_REG_LDO3:
 876         case TPS65911_REG_LDO5:
 877         case TPS65911_REG_LDO6:
 878         case TPS65911_REG_LDO7:
 879         case TPS65911_REG_LDO8:
 880                 /* The first 3 values of the selector correspond to 1V */
 881                 if (selector < 3)
 882                         selector = 0;
 883                 else
 884                         selector -= 2;
 885
 886                 step_mv = 100;
 887                 break;
 888         case TPS65910_REG_VIO:
 889                 return pmic->info[id]->voltage_table[selector] * 1000;
 890         default:
 891                 return -EINVAL;
 892         }
 893
 894         return (LDO_MIN_VOLT + selector * step_mv) * 1000;
 895 }
 896
 897 /* Regulator ops (except VRTC) */
 898 static struct regulator_ops tps65910_ops_dcdc = {
 899         .is_enabled             = tps65910_is_enabled,
 900         .enable                 = tps65910_enable,
 901         .disable                = tps65910_disable,
 902         .enable_time            = tps65910_enable_time,
 903         .set_mode               = tps65910_set_mode,
 904         .get_mode               = tps65910_get_mode,
 905         .get_voltage            = tps65910_get_voltage_dcdc,
 906         .set_voltage_sel        = tps65910_set_voltage_dcdc_sel,
 907         .list_voltage           = tps65910_list_voltage_dcdc,
 908 };
 909
 910 static struct regulator_ops tps65910_ops_vdd3 = {
 911         .is_enabled             = tps65910_is_enabled,
 912         .enable                 = tps65910_enable,
 913         .disable                = tps65910_disable,
 914         .enable_time            = tps65910_enable_time,
 915         .set_mode               = tps65910_set_mode,
 916         .get_mode               = tps65910_get_mode,
 917         .get_voltage            = tps65910_get_voltage_vdd3,
 918         .list_voltage           = tps65910_list_voltage,
 919 };
 920
 921 static struct regulator_ops tps65910_ops = {
 922         .is_enabled             = tps65910_is_enabled,
 923         .enable                 = tps65910_enable,
 924         .disable                = tps65910_disable,
 925         .enable_time            = tps65910_enable_time,
 926         .set_mode               = tps65910_set_mode,
 927         .get_mode               = tps65910_get_mode,
 928         .get_voltage            = tps65910_get_voltage,
 929         .set_voltage_sel        = tps65910_set_voltage_sel,
 930         .list_voltage           = tps65910_list_voltage,
 931 };
 932
 933 static struct regulator_ops tps65911_ops = {
 934         .is_enabled             = tps65910_is_enabled,
 935         .enable                 = tps65910_enable,
 936         .disable                = tps65910_disable,
 937         .enable_time            = tps65910_enable_time,
 938         .set_mode               = tps65910_set_mode,
 939         .get_mode               = tps65910_get_mode,
 940         .get_voltage            = tps65911_get_voltage,
 941         .set_voltage_sel        = tps65911_set_voltage_sel,
 942         .list_voltage           = tps65911_list_voltage,
 943 };
 944
 945 static int tps65910_set_ext_sleep_config(struct tps65910_reg *pmic,
 946                 int id, int ext_sleep_config)
 947 {
 948         struct tps65910 *mfd = pmic->mfd;
 949         u8 regoffs = (pmic->ext_sleep_control[id] >> 8) & 0xFF;
 950         u8 bit_pos = (1 << pmic->ext_sleep_control[id] & 0xFF);
 951         int ret;
 952
 953         /*
 954          * Regulator can not be control from multiple external input EN1, EN2
 955          * and EN3 together.
 956          */
 957         if (ext_sleep_config & EXT_SLEEP_CONTROL) {
 958                 int en_count;
 959                 en_count = ((ext_sleep_config &
 960                                 TPS65910_SLEEP_CONTROL_EXT_INPUT_EN1) != 0);
 961                 en_count += ((ext_sleep_config &
 962                                 TPS65910_SLEEP_CONTROL_EXT_INPUT_EN2) != 0);
 963                 en_count += ((ext_sleep_config &
 964                                 TPS65910_SLEEP_CONTROL_EXT_INPUT_EN3) != 0);
 965                 en_count += ((ext_sleep_config &
 966                                 TPS65911_SLEEP_CONTROL_EXT_INPUT_SLEEP) != 0);
 967                 if (en_count > 1) {
 968                         dev_err(mfd->dev,
 969                                 "External sleep control flag is not proper\n");
 970                         return -EINVAL;
 971                 }
 972         }
 973
 974         pmic->board_ext_control[id] = ext_sleep_config;
 975
 976         /* External EN1 control */
 977         if (ext_sleep_config & TPS65910_SLEEP_CONTROL_EXT_INPUT_EN1)
 978                 ret = tps65910_set_bits(mfd,
 979                                 TPS65910_EN1_LDO_ASS + regoffs, bit_pos);
 980         else
 981                 ret = tps65910_clear_bits(mfd,
 982                                 TPS65910_EN1_LDO_ASS + regoffs, bit_pos);
 983         if (ret < 0) {
 984                 dev_err(mfd->dev,
 985                         "Error in configuring external control EN1\n");
 986                 return ret;
 987         }
 988
 989         /* External EN2 control */
 990         if (ext_sleep_config & TPS65910_SLEEP_CONTROL_EXT_INPUT_EN2)
 991                 ret = tps65910_set_bits(mfd,
 992                                 TPS65910_EN2_LDO_ASS + regoffs, bit_pos);
 993         else
 994                 ret = tps65910_clear_bits(mfd,
 995                                 TPS65910_EN2_LDO_ASS + regoffs, bit_pos);
 996         if (ret < 0) {
 997                 dev_err(mfd->dev,
 998                         "Error in configuring external control EN2\n");
 999                 return ret;
1000         }
1001
1002         /* External EN3 control for TPS65910 LDO only */
1003         if ((tps65910_chip_id(mfd) == TPS65910) &&
1004                         (id >= TPS65910_REG_VDIG1)) {
1005                 if (ext_sleep_config & TPS65910_SLEEP_CONTROL_EXT_INPUT_EN3)
1006                         ret = tps65910_set_bits(mfd,
1007                                 TPS65910_EN3_LDO_ASS + regoffs, bit_pos);
1008                 else
1009                         ret = tps65910_clear_bits(mfd,
1010                                 TPS65910_EN3_LDO_ASS + regoffs, bit_pos);
1011                 if (ret < 0) {
1012                         dev_err(mfd->dev,
1013                                 "Error in configuring external control EN3\n");
1014                         return ret;
1015                 }
1016         }
1017
1018         /* Return if no external control is selected */
1019         if (!(ext_sleep_config & EXT_SLEEP_CONTROL)) {
1020                 /* Clear all sleep controls */
1021                 ret = tps65910_clear_bits(mfd,
1022                         TPS65910_SLEEP_KEEP_LDO_ON + regoffs, bit_pos);
1023                 if (!ret)
1024                         ret = tps65910_clear_bits(mfd,
1025                                 TPS65910_SLEEP_SET_LDO_OFF + regoffs, bit_pos);
1026                 if (ret < 0)
1027                         dev_err(mfd->dev,
1028                                 "Error in configuring SLEEP register\n");
1029                 return ret;
1030         }
1031
1032         /*
1033          * For regulator that has separate operational and sleep register make
1034          * sure that operational is used and clear sleep register to turn
1035          * regulator off when external control is inactive
1036          */
1037         if ((id == TPS65910_REG_VDD1) ||
1038                 (id == TPS65910_REG_VDD2) ||
1039                         ((id == TPS65911_REG_VDDCTRL) &&
1040                                 (tps65910_chip_id(mfd) == TPS65911))) {
1041                 int op_reg_add = pmic->get_ctrl_reg(id) + 1;
1042                 int sr_reg_add = pmic->get_ctrl_reg(id) + 2;
1043                 int opvsel = tps65910_reg_read(pmic, op_reg_add);
1044                 int srvsel = tps65910_reg_read(pmic, sr_reg_add);
1045                 if (opvsel & VDD1_OP_CMD_MASK) {
1046                         u8 reg_val = srvsel & VDD1_OP_SEL_MASK;
1047                         ret = tps65910_reg_write(pmic, op_reg_add, reg_val);
1048                         if (ret < 0) {
1049                                 dev_err(mfd->dev,
1050                                         "Error in configuring op register\n");
1051                                 return ret;
1052                         }
1053                 }
1054                 ret = tps65910_reg_write(pmic, sr_reg_add, 0);
1055                 if (ret < 0) {
1056                         dev_err(mfd->dev, "Error in settting sr register\n");
1057                         return ret;
1058                 }
1059         }
1060
1061         ret = tps65910_clear_bits(mfd,
1062                         TPS65910_SLEEP_KEEP_LDO_ON + regoffs, bit_pos);
1063         if (!ret) {
1064                 if (ext_sleep_config & TPS65911_SLEEP_CONTROL_EXT_INPUT_SLEEP)
1065                         ret = tps65910_set_bits(mfd,
1066                                 TPS65910_SLEEP_SET_LDO_OFF + regoffs, bit_pos);
1067                 else
1068                         ret = tps65910_clear_bits(mfd,
1069                                 TPS65910_SLEEP_SET_LDO_OFF + regoffs, bit_pos);
1070         }
1071         if (ret < 0)
1072                 dev_err(mfd->dev,
1073                         "Error in configuring SLEEP register\n");
1074
1075         return ret;
1076 }
1077
1078 static __devinit int tps65910_probe(struct platform_device *pdev)
1079 {
1080         struct tps65910 *tps65910 = dev_get_drvdata(pdev->dev.parent);
1081         struct tps_info *info;
1082         struct regulator_init_data *reg_data;
1083         struct regulator_dev *rdev;
1084         struct tps65910_reg *pmic;
1085         struct tps65910_board *pmic_plat_data;
1086         int i, err;
1087
1088         pmic_plat_data = dev_get_platdata(tps65910->dev);
1089         if (!pmic_plat_data)
1090                 return -EINVAL;
1091
1092         pmic = kzalloc(sizeof(*pmic), GFP_KERNEL);
1093         if (!pmic)
1094                 return -ENOMEM;
1095
1096         mutex_init(&pmic->mutex);
1097         pmic->mfd = tps65910;
1098         platform_set_drvdata(pdev, pmic);
1099
1100         /* Give control of all register to control port */
1101         tps65910_set_bits(pmic->mfd, TPS65910_DEVCTRL,
1102                                 DEVCTRL_SR_CTL_I2C_SEL_MASK);
1103
1104         switch(tps65910_chip_id(tps65910)) {
1105         case TPS65910:
1106                 pmic->get_ctrl_reg = &tps65910_get_ctrl_register;
1107                 pmic->num_regulators = ARRAY_SIZE(tps65910_regs);
1108                 pmic->ext_sleep_control = tps65910_ext_sleep_control;
1109                 info = tps65910_regs;
1110                 break;
1111         case TPS65911:
1112                 pmic->get_ctrl_reg = &tps65911_get_ctrl_register;
1113                 pmic->num_regulators = ARRAY_SIZE(tps65911_regs);
1114                 pmic->ext_sleep_control = tps65911_ext_sleep_control;
1115                 info = tps65911_regs;
1116                 break;
1117         default:
1118                 pr_err("Invalid tps chip version\n");
1119                 kfree(pmic);
1120                 return -ENODEV;
1121         }
1122
1123         pmic->desc = kcalloc(pmic->num_regulators,
1124                         sizeof(struct regulator_desc), GFP_KERNEL);
1125         if (!pmic->desc) {
1126                 err = -ENOMEM;
1127                 goto err_free_pmic;
1128         }
1129
1130         pmic->info = kcalloc(pmic->num_regulators,
1131                         sizeof(struct tps_info *), GFP_KERNEL);
1132         if (!pmic->info) {
1133                 err = -ENOMEM;
1134                 goto err_free_desc;
1135         }
1136
1137         pmic->rdev = kcalloc(pmic->num_regulators,
1138                         sizeof(struct regulator_dev *), GFP_KERNEL);
1139         if (!pmic->rdev) {
1140                 err = -ENOMEM;
1141                 goto err_free_info;
1142         }
1143
1144         for (i = 0; i < pmic->num_regulators && i < TPS65910_NUM_REGS;
1145                         i++, info++) {
1146
1147                 reg_data = pmic_plat_data->tps65910_pmic_init_data[i];
1148
1149                 /* Regulator API handles empty constraints but not NULL
1150                  * constraints */
1151                 if (!reg_data)
1152                         continue;
1153
1154                 /* Register the regulators */
1155                 pmic->info[i] = info;
1156
1157                 pmic->desc[i].name = info->name;
1158                 pmic->desc[i].id = i;
1159                 pmic->desc[i].n_voltages = info->n_voltages;
1160
1161                 if (i == TPS65910_REG_VDD1 || i == TPS65910_REG_VDD2) {
1162                         pmic->desc[i].ops = &tps65910_ops_dcdc;
1163                         pmic->desc[i].n_voltages = VDD1_2_NUM_VOLT_FINE *
1164                                                         VDD1_2_NUM_VOLT_COARSE;
1165                 } else if (i == TPS65910_REG_VDD3) {
1166                         if (tps65910_chip_id(tps65910) == TPS65910)
1167                                 pmic->desc[i].ops = &tps65910_ops_vdd3;
1168                         else
1169                                 pmic->desc[i].ops = &tps65910_ops_dcdc;
1170                 } else {
1171                         if (tps65910_chip_id(tps65910) == TPS65910)
1172                                 pmic->desc[i].ops = &tps65910_ops;
1173                         else
1174                                 pmic->desc[i].ops = &tps65911_ops;
1175                 }
1176
1177                 err = tps65910_set_ext_sleep_config(pmic, i,
1178                                 pmic_plat_data->regulator_ext_sleep_control[i]);
1179                 /*
1180                  * Failing on regulator for configuring externally control
1181                  * is not a serious issue, just throw warning.
1182                  */
1183                 if (err < 0)
1184                         dev_warn(tps65910->dev,
1185                                 "Failed to initialise ext control config\n");
1186
1187                 pmic->desc[i].type = REGULATOR_VOLTAGE;
1188                 pmic->desc[i].owner = THIS_MODULE;
1189
1190                 rdev = regulator_register(&pmic->desc[i],
1191                                 tps65910->dev, reg_data, pmic, NULL);
1192                 if (IS_ERR(rdev)) {
1193                         dev_err(tps65910->dev,
1194                                 "failed to register %s regulator\n",
1195                                 pdev->name);
1196                         err = PTR_ERR(rdev);
1197                         goto err_unregister_regulator;
1198                 }
1199
1200                 /* Save regulator for cleanup */
1201                 pmic->rdev[i] = rdev;
1202         }
1203         return 0;
1204
1205 err_unregister_regulator:
1206         while (--i >= 0)
1207                 regulator_unregister(pmic->rdev[i]);
1208         kfree(pmic->rdev);
1209 err_free_info:
1210         kfree(pmic->info);
1211 err_free_desc:
1212         kfree(pmic->desc);
1213 err_free_pmic:
1214         kfree(pmic);
1215         return err;
1216 }
1217
1218 static int __devexit tps65910_remove(struct platform_device *pdev)
1219 {
1220         struct tps65910_reg *pmic = platform_get_drvdata(pdev);
1221         int i;
1222
1223         for (i = 0; i < pmic->num_regulators; i++)
1224                 regulator_unregister(pmic->rdev[i]);
1225
1226         kfree(pmic->rdev);
1227         kfree(pmic->info);
1228         kfree(pmic->desc);
1229         kfree(pmic);
1230         return 0;
1231 }
1232
1233 static void tps65910_shutdown(struct platform_device *pdev)
1234 {
1235         struct tps65910_reg *pmic = platform_get_drvdata(pdev);
1236         int i;
1237
1238         /*
1239          * Before bootloader jumps to kernel, it makes sure that required
1240          * external control signals are in desired state so that given rails
1241          * can be configure accordingly.
1242          * If rails are configured to be controlled from external control
1243          * then before shutting down/rebooting the system, the external
1244          * control configuration need to be remove from the rails so that
1245          * its output will be available as per register programming even
1246          * if external controls are removed. This is require when the POR
1247          * value of the control signals are not in active state and before
1248          * bootloader initializes it, the system requires the rail output
1249          * to be active for booting.
1250          */
1251         for (i = 0; i < pmic->num_regulators; i++) {
1252                 int err;
1253                 if (!pmic->rdev[i])
1254                         continue;
1255
1256                 err = tps65910_set_ext_sleep_config(pmic, i, 0);
1257                 if (err < 0)
1258                         dev_err(&pdev->dev,
1259                                 "Error in clearing external control\n");
1260         }
1261 }
1262
1263 static struct platform_driver tps65910_driver = {
1264         .driver = {
1265                 .name = "tps65910-pmic",
1266                 .owner = THIS_MODULE,
1267         },
1268         .probe = tps65910_probe,
1269         .remove = __devexit_p(tps65910_remove),
1270         .shutdown = tps65910_shutdown,
1271 };
1272
1273 static int __init tps65910_init(void)
1274 {
1275         return platform_driver_register(&tps65910_driver);
1276 }
1277 subsys_initcall(tps65910_init);
1278
1279 static void __exit tps65910_cleanup(void)
1280 {
1281         platform_driver_unregister(&tps65910_driver);
1282 }
1283 module_exit(tps65910_cleanup);
1284
1285 MODULE_AUTHOR("Graeme Gregory <gg@slimlogic.co.uk>");
1286 MODULE_DESCRIPTION("TPS65910/TPS65911 voltage regulator driver");
1287 MODULE_LICENSE("GPL v2");
1288 MODULE_ALIAS("platform:tps65910-pmic");