drivers/regulator/tps6507x-regulator.c

   1 /*
   2  * tps6507x-regulator.c
   3  *
   4  * Regulator driver for TPS65073 PMIC
   5  *
   6  * Copyright (C) 2009 Texas Instrument Incorporated - http://www.ti.com/
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation version 2.
  11  *
  12  * This program is distributed "as is" WITHOUT ANY WARRANTY of any kind,
  13  * whether express or implied; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License for more details.
  16  */
  17
  18 #include <linux/kernel.h>
  19 #include <linux/module.h>
  20 #include <linux/init.h>
  21 #include <linux/err.h>
  22 #include <linux/platform_device.h>
  23 #include <linux/regulator/driver.h>
  24 #include <linux/regulator/machine.h>
  25 #include <linux/regulator/tps6507x.h>
  26 #include <linux/delay.h>
  27 #include <linux/slab.h>
  28 #include <linux/mfd/tps6507x.h>
  29
  30 /* DCDC's */
  31 #define TPS6507X_DCDC_1                         0
  32 #define TPS6507X_DCDC_2                         1
  33 #define TPS6507X_DCDC_3                         2
  34 /* LDOs */
  35 #define TPS6507X_LDO_1                          3
  36 #define TPS6507X_LDO_2                          4
  37
  38 #define TPS6507X_MAX_REG_ID                     TPS6507X_LDO_2
  39
  40 /* Number of step-down converters available */
  41 #define TPS6507X_NUM_DCDC                       3
  42 /* Number of LDO voltage regulators  available */
  43 #define TPS6507X_NUM_LDO                        2
  44 /* Number of total regulators available */
  45 #define TPS6507X_NUM_REGULATOR          (TPS6507X_NUM_DCDC + TPS6507X_NUM_LDO)
  46
  47 /* Supported voltage values for regulators (in milliVolts) */
  48 static const u16 VDCDCx_VSEL_table[] = {
  49         725, 750, 775, 800,
  50         825, 850, 875, 900,
  51         925, 950, 975, 1000,
  52         1025, 1050, 1075, 1100,
  53         1125, 1150, 1175, 1200,
  54         1225, 1250, 1275, 1300,
  55         1325, 1350, 1375, 1400,
  56         1425, 1450, 1475, 1500,
  57         1550, 1600, 1650, 1700,
  58         1750, 1800, 1850, 1900,
  59         1950, 2000, 2050, 2100,
  60         2150, 2200, 2250, 2300,
  61         2350, 2400, 2450, 2500,
  62         2550, 2600, 2650, 2700,
  63         2750, 2800, 2850, 2900,
  64         3000, 3100, 3200, 3300,
  65 };
  66
  67 static const u16 LDO1_VSEL_table[] = {
  68         1000, 1100, 1200, 1250,
  69         1300, 1350, 1400, 1500,
  70         1600, 1800, 2500, 2750,
  71         2800, 3000, 3100, 3300,
  72 };
  73
  74 static const u16 LDO2_VSEL_table[] = {
  75         725, 750, 775, 800,
  76         825, 850, 875, 900,
  77         925, 950, 975, 1000,
  78         1025, 1050, 1075, 1100,
  79         1125, 1150, 1175, 1200,
  80         1225, 1250, 1275, 1300,
  81         1325, 1350, 1375, 1400,
  82         1425, 1450, 1475, 1500,
  83         1550, 1600, 1650, 1700,
  84         1750, 1800, 1850, 1900,
  85         1950, 2000, 2050, 2100,
  86         2150, 2200, 2250, 2300,
  87         2350, 2400, 2450, 2500,
  88         2550, 2600, 2650, 2700,
  89         2750, 2800, 2850, 2900,
  90         3000, 3100, 3200, 3300,
  91 };
  92
  93 struct tps_info {
  94         const char *name;
  95         unsigned min_uV;
  96         unsigned max_uV;
  97         u8 table_len;
  98         const u16 *table;
  99
 100         /* Does DCDC high or the low register defines output voltage? */
 101         bool defdcdc_default;
 102 };
 103
 104 static struct tps_info tps6507x_pmic_regs[] = {
 105         {
 106                 .name = "VDCDC1",
 107                 .min_uV = 725000,
 108                 .max_uV = 3300000,
 109                 .table_len = ARRAY_SIZE(VDCDCx_VSEL_table),
 110                 .table = VDCDCx_VSEL_table,
 111         },
 112         {
 113                 .name = "VDCDC2",
 114                 .min_uV = 725000,
 115                 .max_uV = 3300000,
 116                 .table_len = ARRAY_SIZE(VDCDCx_VSEL_table),
 117                 .table = VDCDCx_VSEL_table,
 118         },
 119         {
 120                 .name = "VDCDC3",
 121                 .min_uV = 725000,
 122                 .max_uV = 3300000,
 123                 .table_len = ARRAY_SIZE(VDCDCx_VSEL_table),
 124                 .table = VDCDCx_VSEL_table,
 125         },
 126         {
 127                 .name = "LDO1",
 128                 .min_uV = 1000000,
 129                 .max_uV = 3300000,
 130                 .table_len = ARRAY_SIZE(LDO1_VSEL_table),
 131                 .table = LDO1_VSEL_table,
 132         },
 133         {
 134                 .name = "LDO2",
 135                 .min_uV = 725000,
 136                 .max_uV = 3300000,
 137                 .table_len = ARRAY_SIZE(LDO2_VSEL_table),
 138                 .table = LDO2_VSEL_table,
 139         },
 140 };
 141
 142 struct tps6507x_pmic {
 143         struct regulator_desc desc[TPS6507X_NUM_REGULATOR];
 144         struct tps6507x_dev *mfd;
 145         struct regulator_dev *rdev[TPS6507X_NUM_REGULATOR];
 146         struct tps_info *info[TPS6507X_NUM_REGULATOR];
 147         struct mutex io_lock;
 148 };
 149 static inline int tps6507x_pmic_read(struct tps6507x_pmic *tps, u8 reg)
 150 {
 151         u8 val;
 152         int err;
 153
 154         err = tps->mfd->read_dev(tps->mfd, reg, 1, &val);
 155
 156         if (err)
 157                 return err;
 158
 159         return val;
 160 }
 161
 162 static inline int tps6507x_pmic_write(struct tps6507x_pmic *tps, u8 reg, u8 val)
 163 {
 164         return tps->mfd->write_dev(tps->mfd, reg, 1, &val);
 165 }
 166
 167 static int tps6507x_pmic_set_bits(struct tps6507x_pmic *tps, u8 reg, u8 mask)
 168 {
 169         int err, data;
 170
 171         mutex_lock(&tps->io_lock);
 172
 173         data = tps6507x_pmic_read(tps, reg);
 174         if (data < 0) {
 175                 dev_err(tps->mfd->dev, "Read from reg 0x%x failed\n", reg);
 176                 err = data;
 177                 goto out;
 178         }
 179
 180         data |= mask;
 181         err = tps6507x_pmic_write(tps, reg, data);
 182         if (err)
 183                 dev_err(tps->mfd->dev, "Write for reg 0x%x failed\n", reg);
 184
 185 out:
 186         mutex_unlock(&tps->io_lock);
 187         return err;
 188 }
 189
 190 static int tps6507x_pmic_clear_bits(struct tps6507x_pmic *tps, u8 reg, u8 mask)
 191 {
 192         int err, data;
 193
 194         mutex_lock(&tps->io_lock);
 195
 196         data = tps6507x_pmic_read(tps, reg);
 197         if (data < 0) {
 198                 dev_err(tps->mfd->dev, "Read from reg 0x%x failed\n", reg);
 199                 err = data;
 200                 goto out;
 201         }
 202
 203         data &= ~mask;
 204         err = tps6507x_pmic_write(tps, reg, data);
 205         if (err)
 206                 dev_err(tps->mfd->dev, "Write for reg 0x%x failed\n", reg);
 207
 208 out:
 209         mutex_unlock(&tps->io_lock);
 210         return err;
 211 }
 212
 213 static int tps6507x_pmic_reg_read(struct tps6507x_pmic *tps, u8 reg)
 214 {
 215         int data;
 216
 217         mutex_lock(&tps->io_lock);
 218
 219         data = tps6507x_pmic_read(tps, reg);
 220         if (data < 0)
 221                 dev_err(tps->mfd->dev, "Read from reg 0x%x failed\n", reg);
 222
 223         mutex_unlock(&tps->io_lock);
 224         return data;
 225 }
 226
 227 static int tps6507x_pmic_reg_write(struct tps6507x_pmic *tps, u8 reg, u8 val)
 228 {
 229         int err;
 230
 231         mutex_lock(&tps->io_lock);
 232
 233         err = tps6507x_pmic_write(tps, reg, val);
 234         if (err < 0)
 235                 dev_err(tps->mfd->dev, "Write for reg 0x%x failed\n", reg);
 236
 237         mutex_unlock(&tps->io_lock);
 238         return err;
 239 }
 240
 241 static int tps6507x_pmic_dcdc_is_enabled(struct regulator_dev *dev)
 242 {
 243         struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
 244         int data, dcdc = rdev_get_id(dev);
 245         u8 shift;
 246
 247         if (dcdc < TPS6507X_DCDC_1 || dcdc > TPS6507X_DCDC_3)
 248                 return -EINVAL;
 249
 250         shift = TPS6507X_MAX_REG_ID - dcdc;
 251         data = tps6507x_pmic_reg_read(tps, TPS6507X_REG_CON_CTRL1);
 252
 253         if (data < 0)
 254                 return data;
 255         else
 256                 return (data & 1<<shift) ? 1 : 0;
 257 }
 258
 259 static int tps6507x_pmic_ldo_is_enabled(struct regulator_dev *dev)
 260 {
 261         struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
 262         int data, ldo = rdev_get_id(dev);
 263         u8 shift;
 264
 265         if (ldo < TPS6507X_LDO_1 || ldo > TPS6507X_LDO_2)
 266                 return -EINVAL;
 267
 268         shift = TPS6507X_MAX_REG_ID - ldo;
 269         data = tps6507x_pmic_reg_read(tps, TPS6507X_REG_CON_CTRL1);
 270
 271         if (data < 0)
 272                 return data;
 273         else
 274                 return (data & 1<<shift) ? 1 : 0;
 275 }
 276
 277 static int tps6507x_pmic_dcdc_enable(struct regulator_dev *dev)
 278 {
 279         struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
 280         int dcdc = rdev_get_id(dev);
 281         u8 shift;
 282
 283         if (dcdc < TPS6507X_DCDC_1 || dcdc > TPS6507X_DCDC_3)
 284                 return -EINVAL;
 285
 286         shift = TPS6507X_MAX_REG_ID - dcdc;
 287         return tps6507x_pmic_set_bits(tps, TPS6507X_REG_CON_CTRL1, 1 << shift);
 288 }
 289
 290 static int tps6507x_pmic_dcdc_disable(struct regulator_dev *dev)
 291 {
 292         struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
 293         int dcdc = rdev_get_id(dev);
 294         u8 shift;
 295
 296         if (dcdc < TPS6507X_DCDC_1 || dcdc > TPS6507X_DCDC_3)
 297                 return -EINVAL;
 298
 299         shift = TPS6507X_MAX_REG_ID - dcdc;
 300         return tps6507x_pmic_clear_bits(tps, TPS6507X_REG_CON_CTRL1,
 301                                         1 << shift);
 302 }
 303
 304 static int tps6507x_pmic_ldo_enable(struct regulator_dev *dev)
 305 {
 306         struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
 307         int ldo = rdev_get_id(dev);
 308         u8 shift;
 309
 310         if (ldo < TPS6507X_LDO_1 || ldo > TPS6507X_LDO_2)
 311                 return -EINVAL;
 312
 313         shift = TPS6507X_MAX_REG_ID - ldo;
 314         return tps6507x_pmic_set_bits(tps, TPS6507X_REG_CON_CTRL1, 1 << shift);
 315 }
 316
 317 static int tps6507x_pmic_ldo_disable(struct regulator_dev *dev)
 318 {
 319         struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
 320         int ldo = rdev_get_id(dev);
 321         u8 shift;
 322
 323         if (ldo < TPS6507X_LDO_1 || ldo > TPS6507X_LDO_2)
 324                 return -EINVAL;
 325
 326         shift = TPS6507X_MAX_REG_ID - ldo;
 327         return tps6507x_pmic_clear_bits(tps, TPS6507X_REG_CON_CTRL1,
 328                                         1 << shift);
 329 }
 330
 331 static int tps6507x_pmic_dcdc_get_voltage(struct regulator_dev *dev)
 332 {
 333         struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
 334         int data, dcdc = rdev_get_id(dev);
 335         u8 reg;
 336
 337         switch (dcdc) {
 338         case TPS6507X_DCDC_1:
 339                 reg = TPS6507X_REG_DEFDCDC1;
 340                 break;
 341         case TPS6507X_DCDC_2:
 342                 if (tps->info[dcdc]->defdcdc_default)
 343                         reg = TPS6507X_REG_DEFDCDC2_HIGH;
 344                 else
 345                         reg = TPS6507X_REG_DEFDCDC2_LOW;
 346                 break;
 347         case TPS6507X_DCDC_3:
 348                 if (tps->info[dcdc]->defdcdc_default)
 349                         reg = TPS6507X_REG_DEFDCDC3_HIGH;
 350                 else
 351                         reg = TPS6507X_REG_DEFDCDC3_LOW;
 352                 break;
 353         default:
 354                 return -EINVAL;
 355         }
 356
 357         data = tps6507x_pmic_reg_read(tps, reg);
 358         if (data < 0)
 359                 return data;
 360
 361         data &= TPS6507X_DEFDCDCX_DCDC_MASK;
 362         return tps->info[dcdc]->table[data] * 1000;
 363 }
 364
 365 static int tps6507x_pmic_dcdc_set_voltage(struct regulator_dev *dev,
 366                                           int min_uV, int max_uV,
 367                                           unsigned *selector)
 368 {
 369         struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
 370         int data, vsel, dcdc = rdev_get_id(dev);
 371         u8 reg;
 372
 373         switch (dcdc) {
 374         case TPS6507X_DCDC_1:
 375                 reg = TPS6507X_REG_DEFDCDC1;
 376                 break;
 377         case TPS6507X_DCDC_2:
 378                 if (tps->info[dcdc]->defdcdc_default)
 379                         reg = TPS6507X_REG_DEFDCDC2_HIGH;
 380                 else
 381                         reg = TPS6507X_REG_DEFDCDC2_LOW;
 382                 break;
 383         case TPS6507X_DCDC_3:
 384                 if (tps->info[dcdc]->defdcdc_default)
 385                         reg = TPS6507X_REG_DEFDCDC3_HIGH;
 386                 else
 387                         reg = TPS6507X_REG_DEFDCDC3_LOW;
 388                 break;
 389         default:
 390                 return -EINVAL;
 391         }
 392
 393         if (min_uV < tps->info[dcdc]->min_uV
 394                 || min_uV > tps->info[dcdc]->max_uV)
 395                 return -EINVAL;
 396         if (max_uV < tps->info[dcdc]->min_uV
 397                 || max_uV > tps->info[dcdc]->max_uV)
 398                 return -EINVAL;
 399
 400         for (vsel = 0; vsel < tps->info[dcdc]->table_len; vsel++) {
 401                 int mV = tps->info[dcdc]->table[vsel];
 402                 int uV = mV * 1000;
 403
 404                 /* Break at the first in-range value */
 405                 if (min_uV <= uV && uV <= max_uV)
 406                         break;
 407         }
 408
 409         /* write to the register in case we found a match */
 410         if (vsel == tps->info[dcdc]->table_len)
 411                 return -EINVAL;
 412
 413         *selector = vsel;
 414
 415         data = tps6507x_pmic_reg_read(tps, reg);
 416         if (data < 0)
 417                 return data;
 418
 419         data &= ~TPS6507X_DEFDCDCX_DCDC_MASK;
 420         data |= vsel;
 421
 422         return tps6507x_pmic_reg_write(tps, reg, data);
 423 }
 424
 425 static int tps6507x_pmic_ldo_get_voltage(struct regulator_dev *dev)
 426 {
 427         struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
 428         int data, ldo = rdev_get_id(dev);
 429         u8 reg, mask;
 430
 431         if (ldo < TPS6507X_LDO_1 || ldo > TPS6507X_LDO_2)
 432                 return -EINVAL;
 433         else {
 434                 reg = (ldo == TPS6507X_LDO_1 ?
 435                         TPS6507X_REG_LDO_CTRL1 : TPS6507X_REG_DEFLDO2);
 436                 mask = (ldo == TPS6507X_LDO_1 ?
 437                         TPS6507X_REG_LDO_CTRL1_LDO1_MASK :
 438                                 TPS6507X_REG_DEFLDO2_LDO2_MASK);
 439         }
 440
 441         data = tps6507x_pmic_reg_read(tps, reg);
 442         if (data < 0)
 443                 return data;
 444
 445         data &= mask;
 446         return tps->info[ldo]->table[data] * 1000;
 447 }
 448
 449 static int tps6507x_pmic_ldo_set_voltage(struct regulator_dev *dev,
 450                                          int min_uV, int max_uV,
 451                                          unsigned *selector)
 452 {
 453         struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
 454         int data, vsel, ldo = rdev_get_id(dev);
 455         u8 reg, mask;
 456
 457         if (ldo < TPS6507X_LDO_1 || ldo > TPS6507X_LDO_2)
 458                 return -EINVAL;
 459         else {
 460                 reg = (ldo == TPS6507X_LDO_1 ?
 461                         TPS6507X_REG_LDO_CTRL1 : TPS6507X_REG_DEFLDO2);
 462                 mask = (ldo == TPS6507X_LDO_1 ?
 463                         TPS6507X_REG_LDO_CTRL1_LDO1_MASK :
 464                                 TPS6507X_REG_DEFLDO2_LDO2_MASK);
 465         }
 466
 467         if (min_uV < tps->info[ldo]->min_uV || min_uV > tps->info[ldo]->max_uV)
 468                 return -EINVAL;
 469         if (max_uV < tps->info[ldo]->min_uV || max_uV > tps->info[ldo]->max_uV)
 470                 return -EINVAL;
 471
 472         for (vsel = 0; vsel < tps->info[ldo]->table_len; vsel++) {
 473                 int mV = tps->info[ldo]->table[vsel];
 474                 int uV = mV * 1000;
 475
 476                 /* Break at the first in-range value */
 477                 if (min_uV <= uV && uV <= max_uV)
 478                         break;
 479         }
 480
 481         if (vsel == tps->info[ldo]->table_len)
 482                 return -EINVAL;
 483
 484         *selector = vsel;
 485
 486         data = tps6507x_pmic_reg_read(tps, reg);
 487         if (data < 0)
 488                 return data;
 489
 490         data &= ~mask;
 491         data |= vsel;
 492
 493         return tps6507x_pmic_reg_write(tps, reg, data);
 494 }
 495
 496 static int tps6507x_pmic_dcdc_list_voltage(struct regulator_dev *dev,
 497                                         unsigned selector)
 498 {
 499         struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
 500         int dcdc = rdev_get_id(dev);
 501
 502         if (dcdc < TPS6507X_DCDC_1 || dcdc > TPS6507X_DCDC_3)
 503                 return -EINVAL;
 504
 505         if (selector >= tps->info[dcdc]->table_len)
 506                 return -EINVAL;
 507         else
 508                 return tps->info[dcdc]->table[selector] * 1000;
 509 }
 510
 511 static int tps6507x_pmic_ldo_list_voltage(struct regulator_dev *dev,
 512                                         unsigned selector)
 513 {
 514         struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
 515         int ldo = rdev_get_id(dev);
 516
 517         if (ldo < TPS6507X_LDO_1 || ldo > TPS6507X_LDO_2)
 518                 return -EINVAL;
 519
 520         if (selector >= tps->info[ldo]->table_len)
 521                 return -EINVAL;
 522         else
 523                 return tps->info[ldo]->table[selector] * 1000;
 524 }
 525
 526 /* Operations permitted on VDCDCx */
 527 static struct regulator_ops tps6507x_pmic_dcdc_ops = {
 528         .is_enabled = tps6507x_pmic_dcdc_is_enabled,
 529         .enable = tps6507x_pmic_dcdc_enable,
 530         .disable = tps6507x_pmic_dcdc_disable,
 531         .get_voltage = tps6507x_pmic_dcdc_get_voltage,
 532         .set_voltage = tps6507x_pmic_dcdc_set_voltage,
 533         .list_voltage = tps6507x_pmic_dcdc_list_voltage,
 534 };
 535
 536 /* Operations permitted on LDOx */
 537 static struct regulator_ops tps6507x_pmic_ldo_ops = {
 538         .is_enabled = tps6507x_pmic_ldo_is_enabled,
 539         .enable = tps6507x_pmic_ldo_enable,
 540         .disable = tps6507x_pmic_ldo_disable,
 541         .get_voltage = tps6507x_pmic_ldo_get_voltage,
 542         .set_voltage = tps6507x_pmic_ldo_set_voltage,
 543         .list_voltage = tps6507x_pmic_ldo_list_voltage,
 544 };
 545
 546 static __devinit
 547 int tps6507x_pmic_probe(struct platform_device *pdev)
 548 {
 549         struct tps6507x_dev *tps6507x_dev = dev_get_drvdata(pdev->dev.parent);
 550         struct tps_info *info = &tps6507x_pmic_regs[0];
 551         struct regulator_init_data *init_data;
 552         struct regulator_dev *rdev;
 553         struct tps6507x_pmic *tps;
 554         struct tps6507x_board *tps_board;
 555         int i;
 556         int error;
 557
 558         /**
 559          * tps_board points to pmic related constants
 560          * coming from the board-evm file.
 561          */
 562
 563         tps_board = dev_get_platdata(tps6507x_dev->dev);
 564         if (!tps_board)
 565                 return -EINVAL;
 566
 567         /**
 568          * init_data points to array of regulator_init structures
 569          * coming from the board-evm file.
 570          */
 571         init_data = tps_board->tps6507x_pmic_init_data;
 572         if (!init_data)
 573                 return -EINVAL;
 574
 575         tps = kzalloc(sizeof(*tps), GFP_KERNEL);
 576         if (!tps)
 577                 return -ENOMEM;
 578
 579         mutex_init(&tps->io_lock);
 580
 581         /* common for all regulators */
 582         tps->mfd = tps6507x_dev;
 583
 584         for (i = 0; i < TPS6507X_NUM_REGULATOR; i++, info++, init_data++) {
 585                 /* Register the regulators */
 586                 tps->info[i] = info;
 587                 if (init_data->driver_data) {
 588                         struct tps6507x_reg_platform_data *data =
 589                                                         init_data->driver_data;
 590                         tps->info[i]->defdcdc_default = data->defdcdc_default;
 591                 }
 592
 593                 tps->desc[i].name = info->name;
 594                 tps->desc[i].id = i;
 595                 tps->desc[i].n_voltages = info->table_len;
 596                 tps->desc[i].ops = (i > TPS6507X_DCDC_3 ?
 597                 &tps6507x_pmic_ldo_ops : &tps6507x_pmic_dcdc_ops);
 598                 tps->desc[i].type = REGULATOR_VOLTAGE;
 599                 tps->desc[i].owner = THIS_MODULE;
 600
 601                 rdev = regulator_register(&tps->desc[i],
 602                                         tps6507x_dev->dev, init_data, tps, NULL);
 603                 if (IS_ERR(rdev)) {
 604                         dev_err(tps6507x_dev->dev,
 605                                 "failed to register %s regulator\n",
 606                                 pdev->name);
 607                         error = PTR_ERR(rdev);
 608                         goto fail;
 609                 }
 610
 611                 /* Save regulator for cleanup */
 612                 tps->rdev[i] = rdev;
 613         }
 614
 615         tps6507x_dev->pmic = tps;
 616         platform_set_drvdata(pdev, tps6507x_dev);
 617
 618         return 0;
 619
 620 fail:
 621         while (--i >= 0)
 622                 regulator_unregister(tps->rdev[i]);
 623
 624         kfree(tps);
 625         return error;
 626 }
 627
 628 static int __devexit tps6507x_pmic_remove(struct platform_device *pdev)
 629 {
 630         struct tps6507x_dev *tps6507x_dev = platform_get_drvdata(pdev);
 631         struct tps6507x_pmic *tps = tps6507x_dev->pmic;
 632         int i;
 633
 634         for (i = 0; i < TPS6507X_NUM_REGULATOR; i++)
 635                 regulator_unregister(tps->rdev[i]);
 636
 637         kfree(tps);
 638
 639         return 0;
 640 }
 641
 642 static struct platform_driver tps6507x_pmic_driver = {
 643         .driver = {
 644                 .name = "tps6507x-pmic",
 645                 .owner = THIS_MODULE,
 646         },
 647         .probe = tps6507x_pmic_probe,
 648         .remove = __devexit_p(tps6507x_pmic_remove),
 649 };
 650
 651 /**
 652  * tps6507x_pmic_init
 653  *
 654  * Module init function
 655  */
 656 static int __init tps6507x_pmic_init(void)
 657 {
 658         return platform_driver_register(&tps6507x_pmic_driver);
 659 }
 660 subsys_initcall(tps6507x_pmic_init);
 661
 662 /**
 663  * tps6507x_pmic_cleanup
 664  *
 665  * Module exit function
 666  */
 667 static void __exit tps6507x_pmic_cleanup(void)
 668 {
 669         platform_driver_unregister(&tps6507x_pmic_driver);
 670 }
 671 module_exit(tps6507x_pmic_cleanup);
 672
 673 MODULE_AUTHOR("Texas Instruments");
 674 MODULE_DESCRIPTION("TPS6507x voltage regulator driver");
 675 MODULE_LICENSE("GPL v2");
 676 MODULE_ALIAS("platform:tps6507x-pmic");