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/i2c.h>
  26 #include <linux/delay.h>
  27
  28 /* Register definitions */
  29 #define TPS6507X_REG_PPATH1                             0X01
  30 #define TPS6507X_REG_INT                                0X02
  31 #define TPS6507X_REG_CHGCONFIG0                         0X03
  32 #define TPS6507X_REG_CHGCONFIG1                         0X04
  33 #define TPS6507X_REG_CHGCONFIG2                         0X05
  34 #define TPS6507X_REG_CHGCONFIG3                         0X06
  35 #define TPS6507X_REG_REG_ADCONFIG                       0X07
  36 #define TPS6507X_REG_TSCMODE                            0X08
  37 #define TPS6507X_REG_ADRESULT_1                         0X09
  38 #define TPS6507X_REG_ADRESULT_2                         0X0A
  39 #define TPS6507X_REG_PGOOD                              0X0B
  40 #define TPS6507X_REG_PGOODMASK                          0X0C
  41 #define TPS6507X_REG_CON_CTRL1                          0X0D
  42 #define TPS6507X_REG_CON_CTRL2                          0X0E
  43 #define TPS6507X_REG_CON_CTRL3                          0X0F
  44 #define TPS6507X_REG_DEFDCDC1                           0X10
  45 #define TPS6507X_REG_DEFDCDC2_LOW                       0X11
  46 #define TPS6507X_REG_DEFDCDC2_HIGH                      0X12
  47 #define TPS6507X_REG_DEFDCDC3_LOW                       0X13
  48 #define TPS6507X_REG_DEFDCDC3_HIGH                      0X14
  49 #define TPS6507X_REG_DEFSLEW                            0X15
  50 #define TPS6507X_REG_LDO_CTRL1                          0X16
  51 #define TPS6507X_REG_DEFLDO2                            0X17
  52 #define TPS6507X_REG_WLED_CTRL1                         0X18
  53 #define TPS6507X_REG_WLED_CTRL2                         0X19
  54
  55 /* CON_CTRL1 bitfields */
  56 #define TPS6507X_CON_CTRL1_DCDC1_ENABLE         BIT(4)
  57 #define TPS6507X_CON_CTRL1_DCDC2_ENABLE         BIT(3)
  58 #define TPS6507X_CON_CTRL1_DCDC3_ENABLE         BIT(2)
  59 #define TPS6507X_CON_CTRL1_LDO1_ENABLE          BIT(1)
  60 #define TPS6507X_CON_CTRL1_LDO2_ENABLE          BIT(0)
  61
  62 /* DEFDCDC1 bitfields */
  63 #define TPS6507X_DEFDCDC1_DCDC1_EXT_ADJ_EN      BIT(7)
  64 #define TPS6507X_DEFDCDC1_DCDC1_MASK            0X3F
  65
  66 /* DEFDCDC2_LOW bitfields */
  67 #define TPS6507X_DEFDCDC2_LOW_DCDC2_MASK        0X3F
  68
  69 /* DEFDCDC2_HIGH bitfields */
  70 #define TPS6507X_DEFDCDC2_HIGH_DCDC2_MASK       0X3F
  71
  72 /* DEFDCDC3_LOW bitfields */
  73 #define TPS6507X_DEFDCDC3_LOW_DCDC3_MASK        0X3F
  74
  75 /* DEFDCDC3_HIGH bitfields */
  76 #define TPS6507X_DEFDCDC3_HIGH_DCDC3_MASK       0X3F
  77
  78 /* TPS6507X_REG_LDO_CTRL1 bitfields */
  79 #define TPS6507X_REG_LDO_CTRL1_LDO1_MASK        0X0F
  80
  81 /* TPS6507X_REG_DEFLDO2 bitfields */
  82 #define TPS6507X_REG_DEFLDO2_LDO2_MASK          0X3F
  83
  84 /* VDCDC MASK */
  85 #define TPS6507X_DEFDCDCX_DCDC_MASK             0X3F
  86
  87 /* DCDC's */
  88 #define TPS6507X_DCDC_1                         0
  89 #define TPS6507X_DCDC_2                         1
  90 #define TPS6507X_DCDC_3                         2
  91 /* LDOs */
  92 #define TPS6507X_LDO_1                          3
  93 #define TPS6507X_LDO_2                          4
  94
  95 #define TPS6507X_MAX_REG_ID                     TPS6507X_LDO_2
  96
  97 /* Number of step-down converters available */
  98 #define TPS6507X_NUM_DCDC                       3
  99 /* Number of LDO voltage regulators  available */
 100 #define TPS6507X_NUM_LDO                        2
 101 /* Number of total regulators available */
 102 #define TPS6507X_NUM_REGULATOR          (TPS6507X_NUM_DCDC + TPS6507X_NUM_LDO)
 103
 104 /* Supported voltage values for regulators (in milliVolts) */
 105 static const u16 VDCDCx_VSEL_table[] = {
 106         725, 750, 775, 800,
 107         825, 850, 875, 900,
 108         925, 950, 975, 1000,
 109         1025, 1050, 1075, 1100,
 110         1125, 1150, 1175, 1200,
 111         1225, 1250, 1275, 1300,
 112         1325, 1350, 1375, 1400,
 113         1425, 1450, 1475, 1500,
 114         1550, 1600, 1650, 1700,
 115         1750, 1800, 1850, 1900,
 116         1950, 2000, 2050, 2100,
 117         2150, 2200, 2250, 2300,
 118         2350, 2400, 2450, 2500,
 119         2550, 2600, 2650, 2700,
 120         2750, 2800, 2850, 2900,
 121         3000, 3100, 3200, 3300,
 122 };
 123
 124 static const u16 LDO1_VSEL_table[] = {
 125         1000, 1100, 1200, 1250,
 126         1300, 1350, 1400, 1500,
 127         1600, 1800, 2500, 2750,
 128         2800, 3000, 3100, 3300,
 129 };
 130
 131 static const u16 LDO2_VSEL_table[] = {
 132         725, 750, 775, 800,
 133         825, 850, 875, 900,
 134         925, 950, 975, 1000,
 135         1025, 1050, 1075, 1100,
 136         1125, 1150, 1175, 1200,
 137         1225, 1250, 1275, 1300,
 138         1325, 1350, 1375, 1400,
 139         1425, 1450, 1475, 1500,
 140         1550, 1600, 1650, 1700,
 141         1750, 1800, 1850, 1900,
 142         1950, 2000, 2050, 2100,
 143         2150, 2200, 2250, 2300,
 144         2350, 2400, 2450, 2500,
 145         2550, 2600, 2650, 2700,
 146         2750, 2800, 2850, 2900,
 147         3000, 3100, 3200, 3300,
 148 };
 149
 150 static unsigned int num_voltages[] = {ARRAY_SIZE(VDCDCx_VSEL_table),
 151                                 ARRAY_SIZE(VDCDCx_VSEL_table),
 152                                 ARRAY_SIZE(VDCDCx_VSEL_table),
 153                                 ARRAY_SIZE(LDO1_VSEL_table),
 154                                 ARRAY_SIZE(LDO2_VSEL_table)};
 155
 156 struct tps_info {
 157         const char *name;
 158         unsigned min_uV;
 159         unsigned max_uV;
 160         u8 table_len;
 161         const u16 *table;
 162 };
 163
 164 struct tps_pmic {
 165         struct regulator_desc desc[TPS6507X_NUM_REGULATOR];
 166         struct i2c_client *client;
 167         struct regulator_dev *rdev[TPS6507X_NUM_REGULATOR];
 168         const struct tps_info *info[TPS6507X_NUM_REGULATOR];
 169         struct mutex io_lock;
 170 };
 171
 172 static inline int tps_6507x_read(struct tps_pmic *tps, u8 reg)
 173 {
 174         return i2c_smbus_read_byte_data(tps->client, reg);
 175 }
 176
 177 static inline int tps_6507x_write(struct tps_pmic *tps, u8 reg, u8 val)
 178 {
 179         return i2c_smbus_write_byte_data(tps->client, reg, val);
 180 }
 181
 182 static int tps_6507x_set_bits(struct tps_pmic *tps, u8 reg, u8 mask)
 183 {
 184         int err, data;
 185
 186         mutex_lock(&tps->io_lock);
 187
 188         data = tps_6507x_read(tps, reg);
 189         if (data < 0) {
 190                 dev_err(&tps->client->dev, "Read from reg 0x%x failed\n", reg);
 191                 err = data;
 192                 goto out;
 193         }
 194
 195         data |= mask;
 196         err = tps_6507x_write(tps, reg, data);
 197         if (err)
 198                 dev_err(&tps->client->dev, "Write for reg 0x%x failed\n", reg);
 199
 200 out:
 201         mutex_unlock(&tps->io_lock);
 202         return err;
 203 }
 204
 205 static int tps_6507x_clear_bits(struct tps_pmic *tps, u8 reg, u8 mask)
 206 {
 207         int err, data;
 208
 209         mutex_lock(&tps->io_lock);
 210
 211         data = tps_6507x_read(tps, reg);
 212         if (data < 0) {
 213                 dev_err(&tps->client->dev, "Read from reg 0x%x failed\n", reg);
 214                 err = data;
 215                 goto out;
 216         }
 217
 218         data &= ~mask;
 219         err = tps_6507x_write(tps, reg, data);
 220         if (err)
 221                 dev_err(&tps->client->dev, "Write for reg 0x%x failed\n", reg);
 222
 223 out:
 224         mutex_unlock(&tps->io_lock);
 225         return err;
 226 }
 227
 228 static int tps_6507x_reg_read(struct tps_pmic *tps, u8 reg)
 229 {
 230         int data;
 231
 232         mutex_lock(&tps->io_lock);
 233
 234         data = tps_6507x_read(tps, reg);
 235         if (data < 0)
 236                 dev_err(&tps->client->dev, "Read from reg 0x%x failed\n", reg);
 237
 238         mutex_unlock(&tps->io_lock);
 239         return data;
 240 }
 241
 242 static int tps_6507x_reg_write(struct tps_pmic *tps, u8 reg, u8 val)
 243 {
 244         int err;
 245
 246         mutex_lock(&tps->io_lock);
 247
 248         err = tps_6507x_write(tps, reg, val);
 249         if (err < 0)
 250                 dev_err(&tps->client->dev, "Write for reg 0x%x failed\n", reg);
 251
 252         mutex_unlock(&tps->io_lock);
 253         return err;
 254 }
 255
 256 static int tps6507x_dcdc_is_enabled(struct regulator_dev *dev)
 257 {
 258         struct tps_pmic *tps = rdev_get_drvdata(dev);
 259         int data, dcdc = rdev_get_id(dev);
 260         u8 shift;
 261
 262         if (dcdc < TPS6507X_DCDC_1 || dcdc > TPS6507X_DCDC_3)
 263                 return -EINVAL;
 264
 265         shift = TPS6507X_MAX_REG_ID - dcdc;
 266         data = tps_6507x_reg_read(tps, TPS6507X_REG_CON_CTRL1);
 267
 268         if (data < 0)
 269                 return data;
 270         else
 271                 return (data & 1<<shift) ? 1 : 0;
 272 }
 273
 274 static int tps6507x_ldo_is_enabled(struct regulator_dev *dev)
 275 {
 276         struct tps_pmic *tps = rdev_get_drvdata(dev);
 277         int data, ldo = rdev_get_id(dev);
 278         u8 shift;
 279
 280         if (ldo < TPS6507X_LDO_1 || ldo > TPS6507X_LDO_2)
 281                 return -EINVAL;
 282
 283         shift = TPS6507X_MAX_REG_ID - ldo;
 284         data = tps_6507x_reg_read(tps, TPS6507X_REG_CON_CTRL1);
 285
 286         if (data < 0)
 287                 return data;
 288         else
 289                 return (data & 1<<shift) ? 1 : 0;
 290 }
 291
 292 static int tps6507x_dcdc_enable(struct regulator_dev *dev)
 293 {
 294         struct tps_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 tps_6507x_set_bits(tps, TPS6507X_REG_CON_CTRL1, 1 << shift);
 303 }
 304
 305 static int tps6507x_dcdc_disable(struct regulator_dev *dev)
 306 {
 307         struct tps_pmic *tps = rdev_get_drvdata(dev);
 308         int dcdc = rdev_get_id(dev);
 309         u8 shift;
 310
 311         if (dcdc < TPS6507X_DCDC_1 || dcdc > TPS6507X_DCDC_3)
 312                 return -EINVAL;
 313
 314         shift = TPS6507X_MAX_REG_ID - dcdc;
 315         return tps_6507x_clear_bits(tps, TPS6507X_REG_CON_CTRL1, 1 << shift);
 316 }
 317
 318 static int tps6507x_ldo_enable(struct regulator_dev *dev)
 319 {
 320         struct tps_pmic *tps = rdev_get_drvdata(dev);
 321         int ldo = rdev_get_id(dev);
 322         u8 shift;
 323
 324         if (ldo < TPS6507X_LDO_1 || ldo > TPS6507X_LDO_2)
 325                 return -EINVAL;
 326
 327         shift = TPS6507X_MAX_REG_ID - ldo;
 328         return tps_6507x_set_bits(tps, TPS6507X_REG_CON_CTRL1, 1 << shift);
 329 }
 330
 331 static int tps6507x_ldo_disable(struct regulator_dev *dev)
 332 {
 333         struct tps_pmic *tps = rdev_get_drvdata(dev);
 334         int ldo = rdev_get_id(dev);
 335         u8 shift;
 336
 337         if (ldo < TPS6507X_LDO_1 || ldo > TPS6507X_LDO_2)
 338                 return -EINVAL;
 339
 340         shift = TPS6507X_MAX_REG_ID - ldo;
 341         return tps_6507x_clear_bits(tps, TPS6507X_REG_CON_CTRL1, 1 << shift);
 342 }
 343
 344 static int tps6507x_dcdc_get_voltage(struct regulator_dev *dev)
 345 {
 346         struct tps_pmic *tps = rdev_get_drvdata(dev);
 347         int data, dcdc = rdev_get_id(dev);
 348         u8 reg;
 349
 350         switch (dcdc) {
 351         case TPS6507X_DCDC_1:
 352                 reg = TPS6507X_REG_DEFDCDC1;
 353                 break;
 354         case TPS6507X_DCDC_2:
 355                 reg = TPS6507X_REG_DEFDCDC2_LOW;
 356                 break;
 357         case TPS6507X_DCDC_3:
 358                 reg = TPS6507X_REG_DEFDCDC3_LOW;
 359                 break;
 360         default:
 361                 return -EINVAL;
 362         }
 363
 364         data = tps_6507x_reg_read(tps, reg);
 365         if (data < 0)
 366                 return data;
 367
 368         data &= TPS6507X_DEFDCDCX_DCDC_MASK;
 369         return tps->info[dcdc]->table[data] * 1000;
 370 }
 371
 372 static int tps6507x_dcdc_set_voltage(struct regulator_dev *dev,
 373                                 int min_uV, int max_uV)
 374 {
 375         struct tps_pmic *tps = rdev_get_drvdata(dev);
 376         int data, vsel, dcdc = rdev_get_id(dev);
 377         u8 reg;
 378
 379         switch (dcdc) {
 380         case TPS6507X_DCDC_1:
 381                 reg = TPS6507X_REG_DEFDCDC1;
 382                 break;
 383         case TPS6507X_DCDC_2:
 384                 reg = TPS6507X_REG_DEFDCDC2_LOW;
 385                 break;
 386         case TPS6507X_DCDC_3:
 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         data = tps_6507x_reg_read(tps, reg);
 414         if (data < 0)
 415                 return data;
 416
 417         data &= ~TPS6507X_DEFDCDCX_DCDC_MASK;
 418         data |= vsel;
 419
 420         return tps_6507x_reg_write(tps, reg, data);
 421 }
 422
 423 static int tps6507x_ldo_get_voltage(struct regulator_dev *dev)
 424 {
 425         struct tps_pmic *tps = rdev_get_drvdata(dev);
 426         int data, ldo = rdev_get_id(dev);
 427         u8 reg, mask;
 428
 429         if (ldo < TPS6507X_LDO_1 || ldo > TPS6507X_LDO_2)
 430                 return -EINVAL;
 431         else {
 432                 reg = (ldo == TPS6507X_LDO_1 ?
 433                         TPS6507X_REG_LDO_CTRL1 : TPS6507X_REG_DEFLDO2);
 434                 mask = (ldo == TPS6507X_LDO_1 ?
 435                         TPS6507X_REG_LDO_CTRL1_LDO1_MASK :
 436                                 TPS6507X_REG_DEFLDO2_LDO2_MASK);
 437         }
 438
 439         data = tps_6507x_reg_read(tps, reg);
 440         if (data < 0)
 441                 return data;
 442
 443         data &= mask;
 444         return tps->info[ldo]->table[data] * 1000;
 445 }
 446
 447 static int tps6507x_ldo_set_voltage(struct regulator_dev *dev,
 448                                 int min_uV, int max_uV)
 449 {
 450         struct tps_pmic *tps = rdev_get_drvdata(dev);
 451         int data, vsel, ldo = rdev_get_id(dev);
 452         u8 reg, mask;
 453
 454         if (ldo < TPS6507X_LDO_1 || ldo > TPS6507X_LDO_2)
 455                 return -EINVAL;
 456         else {
 457                 reg = (ldo == TPS6507X_LDO_1 ?
 458                         TPS6507X_REG_LDO_CTRL1 : TPS6507X_REG_DEFLDO2);
 459                 mask = (ldo == TPS6507X_LDO_1 ?
 460                         TPS6507X_REG_LDO_CTRL1_LDO1_MASK :
 461                                 TPS6507X_REG_DEFLDO2_LDO2_MASK);
 462         }
 463
 464         if (min_uV < tps->info[ldo]->min_uV || min_uV > tps->info[ldo]->max_uV)
 465                 return -EINVAL;
 466         if (max_uV < tps->info[ldo]->min_uV || max_uV > tps->info[ldo]->max_uV)
 467                 return -EINVAL;
 468
 469         for (vsel = 0; vsel < tps->info[ldo]->table_len; vsel++) {
 470                 int mV = tps->info[ldo]->table[vsel];
 471                 int uV = mV * 1000;
 472
 473                 /* Break at the first in-range value */
 474                 if (min_uV <= uV && uV <= max_uV)
 475                         break;
 476         }
 477
 478         if (vsel == tps->info[ldo]->table_len)
 479                 return -EINVAL;
 480
 481         data = tps_6507x_reg_read(tps, reg);
 482         if (data < 0)
 483                 return data;
 484
 485         data &= ~mask;
 486         data |= vsel;
 487
 488         return tps_6507x_reg_write(tps, reg, data);
 489 }
 490
 491 static int tps6507x_dcdc_list_voltage(struct regulator_dev *dev,
 492                                         unsigned selector)
 493 {
 494         struct tps_pmic *tps = rdev_get_drvdata(dev);
 495         int dcdc = rdev_get_id(dev);
 496
 497         if (dcdc < TPS6507X_DCDC_1 || dcdc > TPS6507X_DCDC_3)
 498                 return -EINVAL;
 499
 500         if (selector >= tps->info[dcdc]->table_len)
 501                 return -EINVAL;
 502         else
 503                 return tps->info[dcdc]->table[selector] * 1000;
 504 }
 505
 506 static int tps6507x_ldo_list_voltage(struct regulator_dev *dev,
 507                                         unsigned selector)
 508 {
 509         struct tps_pmic *tps = rdev_get_drvdata(dev);
 510         int ldo = rdev_get_id(dev);
 511
 512         if (ldo < TPS6507X_LDO_1 || ldo > TPS6507X_LDO_2)
 513                 return -EINVAL;
 514
 515         if (selector >= tps->info[ldo]->table_len)
 516                 return -EINVAL;
 517         else
 518                 return tps->info[ldo]->table[selector] * 1000;
 519 }
 520
 521 /* Operations permitted on VDCDCx */
 522 static struct regulator_ops tps6507x_dcdc_ops = {
 523         .is_enabled = tps6507x_dcdc_is_enabled,
 524         .enable = tps6507x_dcdc_enable,
 525         .disable = tps6507x_dcdc_disable,
 526         .get_voltage = tps6507x_dcdc_get_voltage,
 527         .set_voltage = tps6507x_dcdc_set_voltage,
 528         .list_voltage = tps6507x_dcdc_list_voltage,
 529 };
 530
 531 /* Operations permitted on LDOx */
 532 static struct regulator_ops tps6507x_ldo_ops = {
 533         .is_enabled = tps6507x_ldo_is_enabled,
 534         .enable = tps6507x_ldo_enable,
 535         .disable = tps6507x_ldo_disable,
 536         .get_voltage = tps6507x_ldo_get_voltage,
 537         .set_voltage = tps6507x_ldo_set_voltage,
 538         .list_voltage = tps6507x_ldo_list_voltage,
 539 };
 540
 541 static int __devinit tps_6507x_probe(struct i2c_client *client,
 542                                      const struct i2c_device_id *id)
 543 {
 544         static int desc_id;
 545         const struct tps_info *info = (void *)id->driver_data;
 546         struct regulator_init_data *init_data;
 547         struct regulator_dev *rdev;
 548         struct tps_pmic *tps;
 549         int i;
 550         int error;
 551
 552         if (!i2c_check_functionality(client->adapter,
 553                                 I2C_FUNC_SMBUS_BYTE_DATA))
 554                 return -EIO;
 555
 556         /**
 557          * init_data points to array of regulator_init structures
 558          * coming from the board-evm file.
 559          */
 560         init_data = client->dev.platform_data;
 561         if (!init_data)
 562                 return -EIO;
 563
 564         tps = kzalloc(sizeof(*tps), GFP_KERNEL);
 565         if (!tps)
 566                 return -ENOMEM;
 567
 568         mutex_init(&tps->io_lock);
 569
 570         /* common for all regulators */
 571         tps->client = client;
 572
 573         for (i = 0; i < TPS6507X_NUM_REGULATOR; i++, info++, init_data++) {
 574                 /* Register the regulators */
 575                 tps->info[i] = info;
 576                 tps->desc[i].name = info->name;
 577                 tps->desc[i].id = desc_id++;
 578                 tps->desc[i].n_voltages = num_voltages[i];
 579                 tps->desc[i].ops = (i > TPS6507X_DCDC_3 ?
 580                                 &tps6507x_ldo_ops : &tps6507x_dcdc_ops);
 581                 tps->desc[i].type = REGULATOR_VOLTAGE;
 582                 tps->desc[i].owner = THIS_MODULE;
 583
 584                 rdev = regulator_register(&tps->desc[i],
 585                                         &client->dev, init_data, tps);
 586                 if (IS_ERR(rdev)) {
 587                         dev_err(&client->dev, "failed to register %s\n",
 588                                 id->name);
 589                         error = PTR_ERR(rdev);
 590                         goto fail;
 591                 }
 592
 593                 /* Save regulator for cleanup */
 594                 tps->rdev[i] = rdev;
 595         }
 596
 597         i2c_set_clientdata(client, tps);
 598
 599         return 0;
 600
 601 fail:
 602         while (--i >= 0)
 603                 regulator_unregister(tps->rdev[i]);
 604
 605         kfree(tps);
 606         return error;
 607 }
 608
 609 /**
 610  * tps_6507x_remove - TPS6507x driver i2c remove handler
 611  * @client: i2c driver client device structure
 612  *
 613  * Unregister TPS driver as an i2c client device driver
 614  */
 615 static int __devexit tps_6507x_remove(struct i2c_client *client)
 616 {
 617         struct tps_pmic *tps = i2c_get_clientdata(client);
 618         int i;
 619
 620         /* clear the client data in i2c */
 621         i2c_set_clientdata(client, NULL);
 622
 623         for (i = 0; i < TPS6507X_NUM_REGULATOR; i++)
 624                 regulator_unregister(tps->rdev[i]);
 625
 626         kfree(tps);
 627
 628         return 0;
 629 }
 630
 631 static const struct tps_info tps6507x_regs[] = {
 632         {
 633                 .name = "VDCDC1",
 634                 .min_uV = 725000,
 635                 .max_uV = 3300000,
 636                 .table_len = ARRAY_SIZE(VDCDCx_VSEL_table),
 637                 .table = VDCDCx_VSEL_table,
 638         },
 639         {
 640                 .name = "VDCDC2",
 641                 .min_uV = 725000,
 642                 .max_uV = 3300000,
 643                 .table_len = ARRAY_SIZE(VDCDCx_VSEL_table),
 644                 .table = VDCDCx_VSEL_table,
 645         },
 646         {
 647                 .name = "VDCDC3",
 648                 .min_uV = 725000,
 649                 .max_uV = 3300000,
 650                 .table_len = ARRAY_SIZE(VDCDCx_VSEL_table),
 651                 .table = VDCDCx_VSEL_table,
 652         },
 653         {
 654                 .name = "LDO1",
 655                 .min_uV = 1000000,
 656                 .max_uV = 3300000,
 657                 .table_len = ARRAY_SIZE(LDO1_VSEL_table),
 658                 .table = LDO1_VSEL_table,
 659         },
 660         {
 661                 .name = "LDO2",
 662                 .min_uV = 725000,
 663                 .max_uV = 3300000,
 664                 .table_len = ARRAY_SIZE(LDO2_VSEL_table),
 665                 .table = LDO2_VSEL_table,
 666         },
 667 };
 668
 669 static const struct i2c_device_id tps_6507x_id[] = {
 670         {.name = "tps6507x",
 671         .driver_data = (unsigned long) tps6507x_regs,},
 672         { },
 673 };
 674 MODULE_DEVICE_TABLE(i2c, tps_6507x_id);
 675
 676 static struct i2c_driver tps_6507x_i2c_driver = {
 677         .driver = {
 678                 .name = "tps6507x",
 679                 .owner = THIS_MODULE,
 680         },
 681         .probe = tps_6507x_probe,
 682         .remove = __devexit_p(tps_6507x_remove),
 683         .id_table = tps_6507x_id,
 684 };
 685
 686 /**
 687  * tps_6507x_init
 688  *
 689  * Module init function
 690  */
 691 static int __init tps_6507x_init(void)
 692 {
 693         return i2c_add_driver(&tps_6507x_i2c_driver);
 694 }
 695 subsys_initcall(tps_6507x_init);
 696
 697 /**
 698  * tps_6507x_cleanup
 699  *
 700  * Module exit function
 701  */
 702 static void __exit tps_6507x_cleanup(void)
 703 {
 704         i2c_del_driver(&tps_6507x_i2c_driver);
 705 }
 706 module_exit(tps_6507x_cleanup);
 707
 708 MODULE_AUTHOR("Texas Instruments");
 709 MODULE_DESCRIPTION("TPS6507x voltage regulator driver");
 710 MODULE_LICENSE("GPL v2");