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/delay.h>
  26 #include <linux/slab.h>
  27 #include <linux/mfd/tps6507x.h>
  28
  29 /* DCDC's */
  30 #define TPS6507X_DCDC_1                         0
  31 #define TPS6507X_DCDC_2                         1
  32 #define TPS6507X_DCDC_3                         2
  33 /* LDOs */
  34 #define TPS6507X_LDO_1                          3
  35 #define TPS6507X_LDO_2                          4
  36
  37 #define TPS6507X_MAX_REG_ID                     TPS6507X_LDO_2
  38
  39 /* Number of step-down converters available */
  40 #define TPS6507X_NUM_DCDC                       3
  41 /* Number of LDO voltage regulators  available */
  42 #define TPS6507X_NUM_LDO                        2
  43 /* Number of total regulators available */
  44 #define TPS6507X_NUM_REGULATOR          (TPS6507X_NUM_DCDC + TPS6507X_NUM_LDO)
  45
  46 /* Supported voltage values for regulators (in milliVolts) */
  47 static const u16 VDCDCx_VSEL_table[] = {
  48         725, 750, 775, 800,
  49         825, 850, 875, 900,
  50         925, 950, 975, 1000,
  51         1025, 1050, 1075, 1100,
  52         1125, 1150, 1175, 1200,
  53         1225, 1250, 1275, 1300,
  54         1325, 1350, 1375, 1400,
  55         1425, 1450, 1475, 1500,
  56         1550, 1600, 1650, 1700,
  57         1750, 1800, 1850, 1900,
  58         1950, 2000, 2050, 2100,
  59         2150, 2200, 2250, 2300,
  60         2350, 2400, 2450, 2500,
  61         2550, 2600, 2650, 2700,
  62         2750, 2800, 2850, 2900,
  63         3000, 3100, 3200, 3300,
  64 };
  65
  66 static const u16 LDO1_VSEL_table[] = {
  67         1000, 1100, 1200, 1250,
  68         1300, 1350, 1400, 1500,
  69         1600, 1800, 2500, 2750,
  70         2800, 3000, 3100, 3300,
  71 };
  72
  73 static const u16 LDO2_VSEL_table[] = {
  74         725, 750, 775, 800,
  75         825, 850, 875, 900,
  76         925, 950, 975, 1000,
  77         1025, 1050, 1075, 1100,
  78         1125, 1150, 1175, 1200,
  79         1225, 1250, 1275, 1300,
  80         1325, 1350, 1375, 1400,
  81         1425, 1450, 1475, 1500,
  82         1550, 1600, 1650, 1700,
  83         1750, 1800, 1850, 1900,
  84         1950, 2000, 2050, 2100,
  85         2150, 2200, 2250, 2300,
  86         2350, 2400, 2450, 2500,
  87         2550, 2600, 2650, 2700,
  88         2750, 2800, 2850, 2900,
  89         3000, 3100, 3200, 3300,
  90 };
  91
  92 static unsigned int num_voltages[] = {ARRAY_SIZE(VDCDCx_VSEL_table),
  93                                 ARRAY_SIZE(VDCDCx_VSEL_table),
  94                                 ARRAY_SIZE(VDCDCx_VSEL_table),
  95                                 ARRAY_SIZE(LDO1_VSEL_table),
  96                                 ARRAY_SIZE(LDO2_VSEL_table)};
  97
  98 struct tps_info {
  99         const char *name;
 100         unsigned min_uV;
 101         unsigned max_uV;
 102         u8 table_len;
 103         const u16 *table;
 104 };
 105
 106 static const struct tps_info tps6507x_pmic_regs[] = {
 107         {
 108                 .name = "VDCDC1",
 109                 .min_uV = 725000,
 110                 .max_uV = 3300000,
 111                 .table_len = ARRAY_SIZE(VDCDCx_VSEL_table),
 112                 .table = VDCDCx_VSEL_table,
 113         },
 114         {
 115                 .name = "VDCDC2",
 116                 .min_uV = 725000,
 117                 .max_uV = 3300000,
 118                 .table_len = ARRAY_SIZE(VDCDCx_VSEL_table),
 119                 .table = VDCDCx_VSEL_table,
 120         },
 121         {
 122                 .name = "VDCDC3",
 123                 .min_uV = 725000,
 124                 .max_uV = 3300000,
 125                 .table_len = ARRAY_SIZE(VDCDCx_VSEL_table),
 126                 .table = VDCDCx_VSEL_table,
 127         },
 128         {
 129                 .name = "LDO1",
 130                 .min_uV = 1000000,
 131                 .max_uV = 3300000,
 132                 .table_len = ARRAY_SIZE(LDO1_VSEL_table),
 133                 .table = LDO1_VSEL_table,
 134         },
 135         {
 136                 .name = "LDO2",
 137                 .min_uV = 725000,
 138                 .max_uV = 3300000,
 139                 .table_len = ARRAY_SIZE(LDO2_VSEL_table),
 140                 .table = LDO2_VSEL_table,
 141         },
 142 };
 143
 144 struct tps6507x_pmic {
 145         struct regulator_desc desc[TPS6507X_NUM_REGULATOR];
 146         struct tps6507x_dev *mfd;
 147         struct regulator_dev *rdev[TPS6507X_NUM_REGULATOR];
 148         const struct tps_info *info[TPS6507X_NUM_REGULATOR];
 149         struct mutex io_lock;
 150 };
 151 static inline int tps6507x_pmic_read(struct tps6507x_pmic *tps, u8 reg)
 152 {
 153         u8 val;
 154         int err;
 155
 156         err = tps->mfd->read_dev(tps->mfd, reg, 1, &val);
 157
 158         if (err)
 159                 return err;
 160
 161         return val;
 162 }
 163
 164 static inline int tps6507x_pmic_write(struct tps6507x_pmic *tps, u8 reg, u8 val)
 165 {
 166         return tps->mfd->write_dev(tps->mfd, reg, 1, &val);
 167 }
 168
 169 static int tps6507x_pmic_set_bits(struct tps6507x_pmic *tps, u8 reg, u8 mask)
 170 {
 171         int err, data;
 172
 173         mutex_lock(&tps->io_lock);
 174
 175         data = tps6507x_pmic_read(tps, reg);
 176         if (data < 0) {
 177                 dev_err(tps->mfd->dev, "Read from reg 0x%x failed\n", reg);
 178                 err = data;
 179                 goto out;
 180         }
 181
 182         data |= mask;
 183         err = tps6507x_pmic_write(tps, reg, data);
 184         if (err)
 185                 dev_err(tps->mfd->dev, "Write for reg 0x%x failed\n", reg);
 186
 187 out:
 188         mutex_unlock(&tps->io_lock);
 189         return err;
 190 }
 191
 192 static int tps6507x_pmic_clear_bits(struct tps6507x_pmic *tps, u8 reg, u8 mask)
 193 {
 194         int err, data;
 195
 196         mutex_lock(&tps->io_lock);
 197
 198         data = tps6507x_pmic_read(tps, reg);
 199         if (data < 0) {
 200                 dev_err(tps->mfd->dev, "Read from reg 0x%x failed\n", reg);
 201                 err = data;
 202                 goto out;
 203         }
 204
 205         data &= ~mask;
 206         err = tps6507x_pmic_write(tps, reg, data);
 207         if (err)
 208                 dev_err(tps->mfd->dev, "Write for reg 0x%x failed\n", reg);
 209
 210 out:
 211         mutex_unlock(&tps->io_lock);
 212         return err;
 213 }
 214
 215 static int tps6507x_pmic_reg_read(struct tps6507x_pmic *tps, u8 reg)
 216 {
 217         int data;
 218
 219         mutex_lock(&tps->io_lock);
 220
 221         data = tps6507x_pmic_read(tps, reg);
 222         if (data < 0)
 223                 dev_err(tps->mfd->dev, "Read from reg 0x%x failed\n", reg);
 224
 225         mutex_unlock(&tps->io_lock);
 226         return data;
 227 }
 228
 229 static int tps6507x_pmic_reg_write(struct tps6507x_pmic *tps, u8 reg, u8 val)
 230 {
 231         int err;
 232
 233         mutex_lock(&tps->io_lock);
 234
 235         err = tps6507x_pmic_write(tps, reg, val);
 236         if (err < 0)
 237                 dev_err(tps->mfd->dev, "Write for reg 0x%x failed\n", reg);
 238
 239         mutex_unlock(&tps->io_lock);
 240         return err;
 241 }
 242
 243 static int tps6507x_pmic_dcdc_is_enabled(struct regulator_dev *dev)
 244 {
 245         struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
 246         int data, dcdc = rdev_get_id(dev);
 247         u8 shift;
 248
 249         if (dcdc < TPS6507X_DCDC_1 || dcdc > TPS6507X_DCDC_3)
 250                 return -EINVAL;
 251
 252         shift = TPS6507X_MAX_REG_ID - dcdc;
 253         data = tps6507x_pmic_reg_read(tps, TPS6507X_REG_CON_CTRL1);
 254
 255         if (data < 0)
 256                 return data;
 257         else
 258                 return (data & 1<<shift) ? 1 : 0;
 259 }
 260
 261 static int tps6507x_pmic_ldo_is_enabled(struct regulator_dev *dev)
 262 {
 263         struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
 264         int data, ldo = rdev_get_id(dev);
 265         u8 shift;
 266
 267         if (ldo < TPS6507X_LDO_1 || ldo > TPS6507X_LDO_2)
 268                 return -EINVAL;
 269
 270         shift = TPS6507X_MAX_REG_ID - ldo;
 271         data = tps6507x_pmic_reg_read(tps, TPS6507X_REG_CON_CTRL1);
 272
 273         if (data < 0)
 274                 return data;
 275         else
 276                 return (data & 1<<shift) ? 1 : 0;
 277 }
 278
 279 static int tps6507x_pmic_dcdc_enable(struct regulator_dev *dev)
 280 {
 281         struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
 282         int dcdc = rdev_get_id(dev);
 283         u8 shift;
 284
 285         if (dcdc < TPS6507X_DCDC_1 || dcdc > TPS6507X_DCDC_3)
 286                 return -EINVAL;
 287
 288         shift = TPS6507X_MAX_REG_ID - dcdc;
 289         return tps6507x_pmic_set_bits(tps, TPS6507X_REG_CON_CTRL1, 1 << shift);
 290 }
 291
 292 static int tps6507x_pmic_dcdc_disable(struct regulator_dev *dev)
 293 {
 294         struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
 295         int dcdc = rdev_get_id(dev);
 296         u8 shift;
 297
 298         if (dcdc < TPS6507X_DCDC_1 || dcdc > TPS6507X_DCDC_3)
 299                 return -EINVAL;
 300
 301         shift = TPS6507X_MAX_REG_ID - dcdc;
 302         return tps6507x_pmic_clear_bits(tps, TPS6507X_REG_CON_CTRL1,
 303                                         1 << shift);
 304 }
 305
 306 static int tps6507x_pmic_ldo_enable(struct regulator_dev *dev)
 307 {
 308         struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
 309         int ldo = rdev_get_id(dev);
 310         u8 shift;
 311
 312         if (ldo < TPS6507X_LDO_1 || ldo > TPS6507X_LDO_2)
 313                 return -EINVAL;
 314
 315         shift = TPS6507X_MAX_REG_ID - ldo;
 316         return tps6507x_pmic_set_bits(tps, TPS6507X_REG_CON_CTRL1, 1 << shift);
 317 }
 318
 319 static int tps6507x_pmic_ldo_disable(struct regulator_dev *dev)
 320 {
 321         struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
 322         int ldo = rdev_get_id(dev);
 323         u8 shift;
 324
 325         if (ldo < TPS6507X_LDO_1 || ldo > TPS6507X_LDO_2)
 326                 return -EINVAL;
 327
 328         shift = TPS6507X_MAX_REG_ID - ldo;
 329         return tps6507x_pmic_clear_bits(tps, TPS6507X_REG_CON_CTRL1,
 330                                         1 << shift);
 331 }
 332
 333 static int tps6507x_pmic_dcdc_get_voltage(struct regulator_dev *dev)
 334 {
 335         struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
 336         int data, dcdc = rdev_get_id(dev);
 337         u8 reg;
 338
 339         switch (dcdc) {
 340         case TPS6507X_DCDC_1:
 341                 reg = TPS6507X_REG_DEFDCDC1;
 342                 break;
 343         case TPS6507X_DCDC_2:
 344                 reg = TPS6507X_REG_DEFDCDC2_LOW;
 345                 break;
 346         case TPS6507X_DCDC_3:
 347                 reg = TPS6507X_REG_DEFDCDC3_LOW;
 348                 break;
 349         default:
 350                 return -EINVAL;
 351         }
 352
 353         data = tps6507x_pmic_reg_read(tps, reg);
 354         if (data < 0)
 355                 return data;
 356
 357         data &= TPS6507X_DEFDCDCX_DCDC_MASK;
 358         return tps->info[dcdc]->table[data] * 1000;
 359 }
 360
 361 static int tps6507x_pmic_dcdc_set_voltage(struct regulator_dev *dev,
 362                                 int min_uV, int max_uV)
 363 {
 364         struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
 365         int data, vsel, dcdc = rdev_get_id(dev);
 366         u8 reg;
 367
 368         switch (dcdc) {
 369         case TPS6507X_DCDC_1:
 370                 reg = TPS6507X_REG_DEFDCDC1;
 371                 break;
 372         case TPS6507X_DCDC_2:
 373                 reg = TPS6507X_REG_DEFDCDC2_LOW;
 374                 break;
 375         case TPS6507X_DCDC_3:
 376                 reg = TPS6507X_REG_DEFDCDC3_LOW;
 377                 break;
 378         default:
 379                 return -EINVAL;
 380         }
 381
 382         if (min_uV < tps->info[dcdc]->min_uV
 383                 || min_uV > tps->info[dcdc]->max_uV)
 384                 return -EINVAL;
 385         if (max_uV < tps->info[dcdc]->min_uV
 386                 || max_uV > tps->info[dcdc]->max_uV)
 387                 return -EINVAL;
 388
 389         for (vsel = 0; vsel < tps->info[dcdc]->table_len; vsel++) {
 390                 int mV = tps->info[dcdc]->table[vsel];
 391                 int uV = mV * 1000;
 392
 393                 /* Break at the first in-range value */
 394                 if (min_uV <= uV && uV <= max_uV)
 395                         break;
 396         }
 397
 398         /* write to the register in case we found a match */
 399         if (vsel == tps->info[dcdc]->table_len)
 400                 return -EINVAL;
 401
 402         data = tps6507x_pmic_reg_read(tps, reg);
 403         if (data < 0)
 404                 return data;
 405
 406         data &= ~TPS6507X_DEFDCDCX_DCDC_MASK;
 407         data |= vsel;
 408
 409         return tps6507x_pmic_reg_write(tps, reg, data);
 410 }
 411
 412 static int tps6507x_pmic_ldo_get_voltage(struct regulator_dev *dev)
 413 {
 414         struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
 415         int data, ldo = rdev_get_id(dev);
 416         u8 reg, mask;
 417
 418         if (ldo < TPS6507X_LDO_1 || ldo > TPS6507X_LDO_2)
 419                 return -EINVAL;
 420         else {
 421                 reg = (ldo == TPS6507X_LDO_1 ?
 422                         TPS6507X_REG_LDO_CTRL1 : TPS6507X_REG_DEFLDO2);
 423                 mask = (ldo == TPS6507X_LDO_1 ?
 424                         TPS6507X_REG_LDO_CTRL1_LDO1_MASK :
 425                                 TPS6507X_REG_DEFLDO2_LDO2_MASK);
 426         }
 427
 428         data = tps6507x_pmic_reg_read(tps, reg);
 429         if (data < 0)
 430                 return data;
 431
 432         data &= mask;
 433         return tps->info[ldo]->table[data] * 1000;
 434 }
 435
 436 static int tps6507x_pmic_ldo_set_voltage(struct regulator_dev *dev,
 437                                 int min_uV, int max_uV)
 438 {
 439         struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
 440         int data, vsel, ldo = rdev_get_id(dev);
 441         u8 reg, mask;
 442
 443         if (ldo < TPS6507X_LDO_1 || ldo > TPS6507X_LDO_2)
 444                 return -EINVAL;
 445         else {
 446                 reg = (ldo == TPS6507X_LDO_1 ?
 447                         TPS6507X_REG_LDO_CTRL1 : TPS6507X_REG_DEFLDO2);
 448                 mask = (ldo == TPS6507X_LDO_1 ?
 449                         TPS6507X_REG_LDO_CTRL1_LDO1_MASK :
 450                                 TPS6507X_REG_DEFLDO2_LDO2_MASK);
 451         }
 452
 453         if (min_uV < tps->info[ldo]->min_uV || min_uV > tps->info[ldo]->max_uV)
 454                 return -EINVAL;
 455         if (max_uV < tps->info[ldo]->min_uV || max_uV > tps->info[ldo]->max_uV)
 456                 return -EINVAL;
 457
 458         for (vsel = 0; vsel < tps->info[ldo]->table_len; vsel++) {
 459                 int mV = tps->info[ldo]->table[vsel];
 460                 int uV = mV * 1000;
 461
 462                 /* Break at the first in-range value */
 463                 if (min_uV <= uV && uV <= max_uV)
 464                         break;
 465         }
 466
 467         if (vsel == tps->info[ldo]->table_len)
 468                 return -EINVAL;
 469
 470         data = tps6507x_pmic_reg_read(tps, reg);
 471         if (data < 0)
 472                 return data;
 473
 474         data &= ~mask;
 475         data |= vsel;
 476
 477         return tps6507x_pmic_reg_write(tps, reg, data);
 478 }
 479
 480 static int tps6507x_pmic_dcdc_list_voltage(struct regulator_dev *dev,
 481                                         unsigned selector)
 482 {
 483         struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
 484         int dcdc = rdev_get_id(dev);
 485
 486         if (dcdc < TPS6507X_DCDC_1 || dcdc > TPS6507X_DCDC_3)
 487                 return -EINVAL;
 488
 489         if (selector >= tps->info[dcdc]->table_len)
 490                 return -EINVAL;
 491         else
 492                 return tps->info[dcdc]->table[selector] * 1000;
 493 }
 494
 495 static int tps6507x_pmic_ldo_list_voltage(struct regulator_dev *dev,
 496                                         unsigned selector)
 497 {
 498         struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
 499         int ldo = rdev_get_id(dev);
 500
 501         if (ldo < TPS6507X_LDO_1 || ldo > TPS6507X_LDO_2)
 502                 return -EINVAL;
 503
 504         if (selector >= tps->info[ldo]->table_len)
 505                 return -EINVAL;
 506         else
 507                 return tps->info[ldo]->table[selector] * 1000;
 508 }
 509
 510 /* Operations permitted on VDCDCx */
 511 static struct regulator_ops tps6507x_pmic_dcdc_ops = {
 512         .is_enabled = tps6507x_pmic_dcdc_is_enabled,
 513         .enable = tps6507x_pmic_dcdc_enable,
 514         .disable = tps6507x_pmic_dcdc_disable,
 515         .get_voltage = tps6507x_pmic_dcdc_get_voltage,
 516         .set_voltage = tps6507x_pmic_dcdc_set_voltage,
 517         .list_voltage = tps6507x_pmic_dcdc_list_voltage,
 518 };
 519
 520 /* Operations permitted on LDOx */
 521 static struct regulator_ops tps6507x_pmic_ldo_ops = {
 522         .is_enabled = tps6507x_pmic_ldo_is_enabled,
 523         .enable = tps6507x_pmic_ldo_enable,
 524         .disable = tps6507x_pmic_ldo_disable,
 525         .get_voltage = tps6507x_pmic_ldo_get_voltage,
 526         .set_voltage = tps6507x_pmic_ldo_set_voltage,
 527         .list_voltage = tps6507x_pmic_ldo_list_voltage,
 528 };
 529
 530 static __devinit
 531 int tps6507x_pmic_probe(struct platform_device *pdev)
 532 {
 533         struct tps6507x_dev *tps6507x_dev = dev_get_drvdata(pdev->dev.parent);
 534         static int desc_id;
 535         const struct tps_info *info = &tps6507x_pmic_regs[0];
 536         struct regulator_init_data *init_data;
 537         struct regulator_dev *rdev;
 538         struct tps6507x_pmic *tps;
 539         struct tps6507x_board *tps_board;
 540         int i;
 541         int error;
 542
 543         /**
 544          * tps_board points to pmic related constants
 545          * coming from the board-evm file.
 546          */
 547
 548         tps_board = dev_get_platdata(tps6507x_dev->dev);
 549         if (!tps_board)
 550                 return -EINVAL;
 551
 552         /**
 553          * init_data points to array of regulator_init structures
 554          * coming from the board-evm file.
 555          */
 556         init_data = tps_board->tps6507x_pmic_init_data;
 557         if (!init_data)
 558                 return -EINVAL;
 559
 560         tps = kzalloc(sizeof(*tps), GFP_KERNEL);
 561         if (!tps)
 562                 return -ENOMEM;
 563
 564         mutex_init(&tps->io_lock);
 565
 566         /* common for all regulators */
 567         tps->mfd = tps6507x_dev;
 568
 569         for (i = 0; i < TPS6507X_NUM_REGULATOR; i++, info++, init_data++) {
 570                 /* Register the regulators */
 571                 tps->info[i] = info;
 572                 tps->desc[i].name = info->name;
 573                 tps->desc[i].id = desc_id++;
 574                 tps->desc[i].n_voltages = num_voltages[i];
 575                 tps->desc[i].ops = (i > TPS6507X_DCDC_3 ?
 576                 &tps6507x_pmic_ldo_ops : &tps6507x_pmic_dcdc_ops);
 577                 tps->desc[i].type = REGULATOR_VOLTAGE;
 578                 tps->desc[i].owner = THIS_MODULE;
 579
 580                 rdev = regulator_register(&tps->desc[i],
 581                                         tps6507x_dev->dev, init_data, tps);
 582                 if (IS_ERR(rdev)) {
 583                         dev_err(tps6507x_dev->dev,
 584                                 "failed to register %s regulator\n",
 585                                 pdev->name);
 586                         error = PTR_ERR(rdev);
 587                         goto fail;
 588                 }
 589
 590                 /* Save regulator for cleanup */
 591                 tps->rdev[i] = rdev;
 592         }
 593
 594         tps6507x_dev->pmic = tps;
 595
 596         return 0;
 597
 598 fail:
 599         while (--i >= 0)
 600                 regulator_unregister(tps->rdev[i]);
 601
 602         kfree(tps);
 603         return error;
 604 }
 605
 606 /**
 607  * tps6507x_remove - TPS6507x driver i2c remove handler
 608  * @client: i2c driver client device structure
 609  *
 610  * Unregister TPS driver as an i2c client device driver
 611  */
 612 static int __devexit tps6507x_pmic_remove(struct platform_device *pdev)
 613 {
 614         struct tps6507x_dev *tps6507x_dev = platform_get_drvdata(pdev);
 615         struct tps6507x_pmic *tps = tps6507x_dev->pmic;
 616         int i;
 617
 618         for (i = 0; i < TPS6507X_NUM_REGULATOR; i++)
 619                 regulator_unregister(tps->rdev[i]);
 620
 621         kfree(tps);
 622
 623         return 0;
 624 }
 625
 626 static struct platform_driver tps6507x_pmic_driver = {
 627         .driver = {
 628                 .name = "tps6507x-pmic",
 629                 .owner = THIS_MODULE,
 630         },
 631         .probe = tps6507x_pmic_probe,
 632         .remove = __devexit_p(tps6507x_pmic_remove),
 633 };
 634
 635 /**
 636  * tps6507x_pmic_init
 637  *
 638  * Module init function
 639  */
 640 static int __init tps6507x_pmic_init(void)
 641 {
 642         return platform_driver_register(&tps6507x_pmic_driver);
 643 }
 644 subsys_initcall(tps6507x_pmic_init);
 645
 646 /**
 647  * tps6507x_pmic_cleanup
 648  *
 649  * Module exit function
 650  */
 651 static void __exit tps6507x_pmic_cleanup(void)
 652 {
 653         platform_driver_unregister(&tps6507x_pmic_driver);
 654 }
 655 module_exit(tps6507x_pmic_cleanup);
 656
 657 MODULE_AUTHOR("Texas Instruments");
 658 MODULE_DESCRIPTION("TPS6507x voltage regulator driver");
 659 MODULE_LICENSE("GPL v2");
 660 MODULE_ALIAS("platform:tps6507x-pmic");