drivers/regulator/s5m8767.c

   1 /*
   2  * s5m8767.c
   3  *
   4  * Copyright (c) 2011 Samsung Electronics Co., Ltd
   5  *              http://www.samsung.com
   6  *
   7  *  This program is free software; you can redistribute  it and/or modify it
   8  *  under  the terms of  the GNU General  Public License as published by the
   9  *  Free Software Foundation;  either version 2 of the  License, or (at your
  10  *  option) any later version.
  11  *
  12  */
  13
  14 #include <linux/bug.h>
  15 #include <linux/err.h>
  16 #include <linux/gpio.h>
  17 #include <linux/slab.h>
  18 #include <linux/module.h>
  19 #include <linux/platform_device.h>
  20 #include <linux/regulator/driver.h>
  21 #include <linux/regulator/machine.h>
  22 #include <linux/mfd/s5m87xx/s5m-core.h>
  23 #include <linux/mfd/s5m87xx/s5m-pmic.h>
  24
  25 struct s5m8767_info {
  26         struct device *dev;
  27         struct s5m87xx_dev *iodev;
  28         int num_regulators;
  29         struct regulator_dev **rdev;
  30         struct s5m_opmode_data *opmode;
  31
  32         int ramp_delay;
  33         bool buck2_ramp;
  34         bool buck3_ramp;
  35         bool buck4_ramp;
  36
  37         bool buck2_gpiodvs;
  38         bool buck3_gpiodvs;
  39         bool buck4_gpiodvs;
  40         u8 buck2_vol[8];
  41         u8 buck3_vol[8];
  42         u8 buck4_vol[8];
  43         int buck_gpios[3];
  44         int buck_gpioindex;
  45 };
  46
  47 struct s5m_voltage_desc {
  48         int max;
  49         int min;
  50         int step;
  51 };
  52
  53 static const struct s5m_voltage_desc buck_voltage_val1 = {
  54         .max = 2225000,
  55         .min =  650000,
  56         .step =   6250,
  57 };
  58
  59 static const struct s5m_voltage_desc buck_voltage_val2 = {
  60         .max = 1600000,
  61         .min =  600000,
  62         .step =   6250,
  63 };
  64
  65 static const struct s5m_voltage_desc buck_voltage_val3 = {
  66         .max = 3000000,
  67         .min =  750000,
  68         .step =  12500,
  69 };
  70
  71 static const struct s5m_voltage_desc ldo_voltage_val1 = {
  72         .max = 3950000,
  73         .min =  800000,
  74         .step =  50000,
  75 };
  76
  77 static const struct s5m_voltage_desc ldo_voltage_val2 = {
  78         .max = 2375000,
  79         .min =  800000,
  80         .step =  25000,
  81 };
  82
  83 static const struct s5m_voltage_desc *reg_voltage_map[] = {
  84         [S5M8767_LDO1] = &ldo_voltage_val2,
  85         [S5M8767_LDO2] = &ldo_voltage_val2,
  86         [S5M8767_LDO3] = &ldo_voltage_val1,
  87         [S5M8767_LDO4] = &ldo_voltage_val1,
  88         [S5M8767_LDO5] = &ldo_voltage_val1,
  89         [S5M8767_LDO6] = &ldo_voltage_val2,
  90         [S5M8767_LDO7] = &ldo_voltage_val2,
  91         [S5M8767_LDO8] = &ldo_voltage_val2,
  92         [S5M8767_LDO9] = &ldo_voltage_val1,
  93         [S5M8767_LDO10] = &ldo_voltage_val1,
  94         [S5M8767_LDO11] = &ldo_voltage_val1,
  95         [S5M8767_LDO12] = &ldo_voltage_val1,
  96         [S5M8767_LDO13] = &ldo_voltage_val1,
  97         [S5M8767_LDO14] = &ldo_voltage_val1,
  98         [S5M8767_LDO15] = &ldo_voltage_val2,
  99         [S5M8767_LDO16] = &ldo_voltage_val1,
 100         [S5M8767_LDO17] = &ldo_voltage_val1,
 101         [S5M8767_LDO18] = &ldo_voltage_val1,
 102         [S5M8767_LDO19] = &ldo_voltage_val1,
 103         [S5M8767_LDO20] = &ldo_voltage_val1,
 104         [S5M8767_LDO21] = &ldo_voltage_val1,
 105         [S5M8767_LDO22] = &ldo_voltage_val1,
 106         [S5M8767_LDO23] = &ldo_voltage_val1,
 107         [S5M8767_LDO24] = &ldo_voltage_val1,
 108         [S5M8767_LDO25] = &ldo_voltage_val1,
 109         [S5M8767_LDO26] = &ldo_voltage_val1,
 110         [S5M8767_LDO27] = &ldo_voltage_val1,
 111         [S5M8767_LDO28] = &ldo_voltage_val1,
 112         [S5M8767_BUCK1] = &buck_voltage_val1,
 113         [S5M8767_BUCK2] = &buck_voltage_val2,
 114         [S5M8767_BUCK3] = &buck_voltage_val2,
 115         [S5M8767_BUCK4] = &buck_voltage_val2,
 116         [S5M8767_BUCK5] = &buck_voltage_val1,
 117         [S5M8767_BUCK6] = &buck_voltage_val1,
 118         [S5M8767_BUCK7] = NULL,
 119         [S5M8767_BUCK8] = NULL,
 120         [S5M8767_BUCK9] = &buck_voltage_val3,
 121 };
 122
 123 static int s5m8767_list_voltage(struct regulator_dev *rdev,
 124                                 unsigned int selector)
 125 {
 126         const struct s5m_voltage_desc *desc;
 127         int reg_id = rdev_get_id(rdev);
 128         int val;
 129
 130         if (reg_id >= ARRAY_SIZE(reg_voltage_map) || reg_id < 0)
 131                 return -EINVAL;
 132
 133         desc = reg_voltage_map[reg_id];
 134         if (desc == NULL)
 135                 return -EINVAL;
 136
 137         val = desc->min + desc->step * selector;
 138         if (val > desc->max)
 139                 return -EINVAL;
 140
 141         return val;
 142 }
 143
 144 static unsigned int s5m8767_opmode_reg[][4] = {
 145         /* {OFF, ON, LOWPOWER, SUSPEND} */
 146         /* LDO1 ... LDO28 */
 147         {0x0, 0x3, 0x2, 0x1}, /* LDO1 */
 148         {0x0, 0x3, 0x2, 0x1},
 149         {0x0, 0x3, 0x2, 0x1},
 150         {0x0, 0x0, 0x0, 0x0},
 151         {0x0, 0x3, 0x2, 0x1}, /* LDO5 */
 152         {0x0, 0x3, 0x2, 0x1},
 153         {0x0, 0x3, 0x2, 0x1},
 154         {0x0, 0x3, 0x2, 0x1},
 155         {0x0, 0x3, 0x2, 0x1},
 156         {0x0, 0x3, 0x2, 0x1}, /* LDO10 */
 157         {0x0, 0x3, 0x2, 0x1},
 158         {0x0, 0x3, 0x2, 0x1},
 159         {0x0, 0x3, 0x2, 0x1},
 160         {0x0, 0x3, 0x2, 0x1},
 161         {0x0, 0x3, 0x2, 0x1}, /* LDO15 */
 162         {0x0, 0x3, 0x2, 0x1},
 163         {0x0, 0x3, 0x2, 0x1},
 164         {0x0, 0x0, 0x0, 0x0},
 165         {0x0, 0x3, 0x2, 0x1},
 166         {0x0, 0x3, 0x2, 0x1}, /* LDO20 */
 167         {0x0, 0x3, 0x2, 0x1},
 168         {0x0, 0x3, 0x2, 0x1},
 169         {0x0, 0x0, 0x0, 0x0},
 170         {0x0, 0x3, 0x2, 0x1},
 171         {0x0, 0x3, 0x2, 0x1}, /* LDO25 */
 172         {0x0, 0x3, 0x2, 0x1},
 173         {0x0, 0x3, 0x2, 0x1},
 174         {0x0, 0x3, 0x2, 0x1}, /* LDO28 */
 175
 176         /* BUCK1 ... BUCK9 */
 177         {0x0, 0x3, 0x1, 0x1}, /* BUCK1 */
 178         {0x0, 0x3, 0x1, 0x1},
 179         {0x0, 0x3, 0x1, 0x1},
 180         {0x0, 0x3, 0x1, 0x1},
 181         {0x0, 0x3, 0x2, 0x1}, /* BUCK5 */
 182         {0x0, 0x3, 0x1, 0x1},
 183         {0x0, 0x3, 0x1, 0x1},
 184         {0x0, 0x3, 0x1, 0x1},
 185         {0x0, 0x3, 0x1, 0x1}, /* BUCK9 */
 186 };
 187
 188 static int s5m8767_get_register(struct regulator_dev *rdev, int *reg,
 189                                 int *enable_ctrl)
 190 {
 191         int reg_id = rdev_get_id(rdev);
 192         unsigned int mode;
 193         struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
 194
 195         switch (reg_id) {
 196         case S5M8767_LDO1 ... S5M8767_LDO2:
 197                 *reg = S5M8767_REG_LDO1CTRL + (reg_id - S5M8767_LDO1);
 198                 break;
 199         case S5M8767_LDO3 ... S5M8767_LDO28:
 200                 *reg = S5M8767_REG_LDO3CTRL + (reg_id - S5M8767_LDO3);
 201                 break;
 202         case S5M8767_BUCK1:
 203                 *reg = S5M8767_REG_BUCK1CTRL1;
 204                 break;
 205         case S5M8767_BUCK2 ... S5M8767_BUCK4:
 206                 *reg = S5M8767_REG_BUCK2CTRL + (reg_id - S5M8767_BUCK2) * 9;
 207                 break;
 208         case S5M8767_BUCK5:
 209                 *reg = S5M8767_REG_BUCK5CTRL1;
 210                 break;
 211         case S5M8767_BUCK6 ... S5M8767_BUCK9:
 212                 *reg = S5M8767_REG_BUCK6CTRL1 + (reg_id - S5M8767_BUCK6) * 2;
 213                 break;
 214         default:
 215                 return -EINVAL;
 216         }
 217
 218         mode = s5m8767->opmode[reg_id].mode;
 219         *enable_ctrl = s5m8767_opmode_reg[reg_id][mode] << S5M8767_ENCTRL_SHIFT;
 220         return 0;
 221 }
 222
 223 static int s5m8767_reg_is_enabled(struct regulator_dev *rdev)
 224 {
 225         struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
 226         int ret, reg;
 227         int mask = 0xc0, enable_ctrl;
 228         u8 val;
 229
 230         ret = s5m8767_get_register(rdev, &reg, &enable_ctrl);
 231         if (ret == -EINVAL)
 232                 return 1;
 233         else if (ret)
 234                 return ret;
 235
 236         ret = s5m_reg_read(s5m8767->iodev, reg, &val);
 237         if (ret)
 238                 return ret;
 239
 240         return (val & mask) == enable_ctrl;
 241 }
 242
 243 static int s5m8767_reg_enable(struct regulator_dev *rdev)
 244 {
 245         struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
 246         int ret, reg;
 247         int mask = 0xc0, enable_ctrl;
 248
 249         ret = s5m8767_get_register(rdev, &reg, &enable_ctrl);
 250         if (ret)
 251                 return ret;
 252
 253         return s5m_reg_update(s5m8767->iodev, reg, enable_ctrl, mask);
 254 }
 255
 256 static int s5m8767_reg_disable(struct regulator_dev *rdev)
 257 {
 258         struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
 259         int ret, reg;
 260         int  mask = 0xc0, enable_ctrl;
 261
 262         ret = s5m8767_get_register(rdev, &reg, &enable_ctrl);
 263         if (ret)
 264                 return ret;
 265
 266         return s5m_reg_update(s5m8767->iodev, reg, ~mask, mask);
 267 }
 268
 269 static int s5m8767_get_voltage_register(struct regulator_dev *rdev, int *_reg)
 270 {
 271         struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
 272         int reg_id = rdev_get_id(rdev);
 273         int reg;
 274
 275         switch (reg_id) {
 276         case S5M8767_LDO1 ... S5M8767_LDO2:
 277                 reg = S5M8767_REG_LDO1CTRL + (reg_id - S5M8767_LDO1);
 278                 break;
 279         case S5M8767_LDO3 ... S5M8767_LDO28:
 280                 reg = S5M8767_REG_LDO3CTRL + (reg_id - S5M8767_LDO3);
 281                 break;
 282         case S5M8767_BUCK1:
 283                 reg = S5M8767_REG_BUCK1CTRL2;
 284                 break;
 285         case S5M8767_BUCK2:
 286                 reg = S5M8767_REG_BUCK2DVS1;
 287                 if (s5m8767->buck2_gpiodvs)
 288                         reg += s5m8767->buck_gpioindex;
 289                 break;
 290         case S5M8767_BUCK3:
 291                 reg = S5M8767_REG_BUCK3DVS1;
 292                 if (s5m8767->buck3_gpiodvs)
 293                         reg += s5m8767->buck_gpioindex;
 294                 break;
 295         case S5M8767_BUCK4:
 296                 reg = S5M8767_REG_BUCK4DVS1;
 297                 if (s5m8767->buck4_gpiodvs)
 298                         reg += s5m8767->buck_gpioindex;
 299                 break;
 300         case S5M8767_BUCK5:
 301                 reg = S5M8767_REG_BUCK5CTRL2;
 302                 break;
 303         case S5M8767_BUCK6 ... S5M8767_BUCK9:
 304                 reg = S5M8767_REG_BUCK6CTRL2 + (reg_id - S5M8767_BUCK6) * 2;
 305                 break;
 306         default:
 307                 return -EINVAL;
 308         }
 309
 310         *_reg = reg;
 311
 312         return 0;
 313 }
 314
 315 static int s5m8767_get_voltage_sel(struct regulator_dev *rdev)
 316 {
 317         struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
 318         int reg, mask, ret;
 319         int reg_id = rdev_get_id(rdev);
 320         u8 val;
 321
 322         ret = s5m8767_get_voltage_register(rdev, &reg);
 323         if (ret)
 324                 return ret;
 325
 326         mask = (reg_id < S5M8767_BUCK1) ? 0x3f : 0xff;
 327
 328         ret = s5m_reg_read(s5m8767->iodev, reg, &val);
 329         if (ret)
 330                 return ret;
 331
 332         val &= mask;
 333
 334         return val;
 335 }
 336
 337 static int s5m8767_convert_voltage_to_sel(
 338                 const struct s5m_voltage_desc *desc,
 339                 int min_vol, int max_vol)
 340 {
 341         int selector = 0;
 342
 343         if (desc == NULL)
 344                 return -EINVAL;
 345
 346         if (max_vol < desc->min || min_vol > desc->max)
 347                 return -EINVAL;
 348
 349         if (min_vol < desc->min)
 350                 min_vol = desc->min;
 351
 352         selector = DIV_ROUND_UP(min_vol - desc->min, desc->step);
 353
 354         if (desc->min + desc->step * selector > max_vol)
 355                 return -EINVAL;
 356
 357         return selector;
 358 }
 359
 360 static inline void s5m8767_set_high(struct s5m8767_info *s5m8767)
 361 {
 362         int temp_index = s5m8767->buck_gpioindex;
 363
 364         gpio_set_value(s5m8767->buck_gpios[0], (temp_index >> 2) & 0x1);
 365         gpio_set_value(s5m8767->buck_gpios[1], (temp_index >> 1) & 0x1);
 366         gpio_set_value(s5m8767->buck_gpios[2], temp_index & 0x1);
 367 }
 368
 369 static inline void s5m8767_set_low(struct s5m8767_info *s5m8767)
 370 {
 371         int temp_index = s5m8767->buck_gpioindex;
 372
 373         gpio_set_value(s5m8767->buck_gpios[2], temp_index & 0x1);
 374         gpio_set_value(s5m8767->buck_gpios[1], (temp_index >> 1) & 0x1);
 375         gpio_set_value(s5m8767->buck_gpios[0], (temp_index >> 2) & 0x1);
 376 }
 377
 378 static int s5m8767_set_voltage(struct regulator_dev *rdev,
 379                                 int min_uV, int max_uV, unsigned *selector)
 380 {
 381         struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
 382         const struct s5m_voltage_desc *desc;
 383         int reg_id = rdev_get_id(rdev);
 384         int sel, reg, mask, ret = 0, old_index, index = 0;
 385         u8 val;
 386         u8 *buck234_vol = NULL;
 387
 388         switch (reg_id) {
 389         case S5M8767_LDO1 ... S5M8767_LDO28:
 390                 mask = 0x3f;
 391                 break;
 392         case S5M8767_BUCK1 ... S5M8767_BUCK6:
 393                 mask = 0xff;
 394                 if (reg_id == S5M8767_BUCK2 && s5m8767->buck2_gpiodvs)
 395                         buck234_vol = &s5m8767->buck2_vol[0];
 396                 else if (reg_id == S5M8767_BUCK3 && s5m8767->buck3_gpiodvs)
 397                         buck234_vol = &s5m8767->buck3_vol[0];
 398                 else if (reg_id == S5M8767_BUCK4 && s5m8767->buck4_gpiodvs)
 399                         buck234_vol = &s5m8767->buck4_vol[0];
 400                 break;
 401         case S5M8767_BUCK7 ... S5M8767_BUCK8:
 402                 return -EINVAL;
 403         case S5M8767_BUCK9:
 404                 mask = 0xff;
 405                 break;
 406         default:
 407                 return -EINVAL;
 408         }
 409
 410         desc = reg_voltage_map[reg_id];
 411
 412         sel = s5m8767_convert_voltage_to_sel(desc, min_uV, max_uV);
 413         if (sel < 0)
 414                 return sel;
 415
 416         /* buck234_vol != NULL means to control buck234 voltage via DVS GPIO */
 417         if (buck234_vol) {
 418                 while (*buck234_vol != sel) {
 419                         buck234_vol++;
 420                         index++;
 421                 }
 422                 old_index = s5m8767->buck_gpioindex;
 423                 s5m8767->buck_gpioindex = index;
 424
 425                 if (index > old_index)
 426                         s5m8767_set_high(s5m8767);
 427                 else
 428                         s5m8767_set_low(s5m8767);
 429         } else {
 430                 ret = s5m8767_get_voltage_register(rdev, &reg);
 431                 if (ret)
 432                         return ret;
 433
 434                 s5m_reg_read(s5m8767->iodev, reg, &val);
 435                 val = (val & ~mask) | sel;
 436
 437                 ret = s5m_reg_write(s5m8767->iodev, reg, val);
 438         }
 439
 440         *selector = sel;
 441         return ret;
 442 }
 443
 444 static int s5m8767_set_voltage_time_sel(struct regulator_dev *rdev,
 445                                              unsigned int old_sel,
 446                                              unsigned int new_sel)
 447 {
 448         struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
 449         const struct s5m_voltage_desc *desc;
 450         int reg_id = rdev_get_id(rdev);
 451
 452         desc = reg_voltage_map[reg_id];
 453
 454         if ((old_sel < new_sel) && s5m8767->ramp_delay)
 455                 return DIV_ROUND_UP(desc->step * (new_sel - old_sel),
 456                                         s5m8767->ramp_delay * 1000);
 457         return 0;
 458 }
 459
 460 static struct regulator_ops s5m8767_ops = {
 461         .list_voltage           = s5m8767_list_voltage,
 462         .is_enabled             = s5m8767_reg_is_enabled,
 463         .enable                 = s5m8767_reg_enable,
 464         .disable                = s5m8767_reg_disable,
 465         .get_voltage_sel        = s5m8767_get_voltage_sel,
 466         .set_voltage            = s5m8767_set_voltage,
 467         .set_voltage_time_sel   = s5m8767_set_voltage_time_sel,
 468 };
 469
 470 #define s5m8767_regulator_desc(_name) {         \
 471         .name           = #_name,               \
 472         .id             = S5M8767_##_name,      \
 473         .ops            = &s5m8767_ops,         \
 474         .type           = REGULATOR_VOLTAGE,    \
 475         .owner          = THIS_MODULE,          \
 476 }
 477
 478 static struct regulator_desc regulators[] = {
 479         s5m8767_regulator_desc(LDO1),
 480         s5m8767_regulator_desc(LDO2),
 481         s5m8767_regulator_desc(LDO3),
 482         s5m8767_regulator_desc(LDO4),
 483         s5m8767_regulator_desc(LDO5),
 484         s5m8767_regulator_desc(LDO6),
 485         s5m8767_regulator_desc(LDO7),
 486         s5m8767_regulator_desc(LDO8),
 487         s5m8767_regulator_desc(LDO9),
 488         s5m8767_regulator_desc(LDO10),
 489         s5m8767_regulator_desc(LDO11),
 490         s5m8767_regulator_desc(LDO12),
 491         s5m8767_regulator_desc(LDO13),
 492         s5m8767_regulator_desc(LDO14),
 493         s5m8767_regulator_desc(LDO15),
 494         s5m8767_regulator_desc(LDO16),
 495         s5m8767_regulator_desc(LDO17),
 496         s5m8767_regulator_desc(LDO18),
 497         s5m8767_regulator_desc(LDO19),
 498         s5m8767_regulator_desc(LDO20),
 499         s5m8767_regulator_desc(LDO21),
 500         s5m8767_regulator_desc(LDO22),
 501         s5m8767_regulator_desc(LDO23),
 502         s5m8767_regulator_desc(LDO24),
 503         s5m8767_regulator_desc(LDO25),
 504         s5m8767_regulator_desc(LDO26),
 505         s5m8767_regulator_desc(LDO27),
 506         s5m8767_regulator_desc(LDO28),
 507         s5m8767_regulator_desc(BUCK1),
 508         s5m8767_regulator_desc(BUCK2),
 509         s5m8767_regulator_desc(BUCK3),
 510         s5m8767_regulator_desc(BUCK4),
 511         s5m8767_regulator_desc(BUCK5),
 512         s5m8767_regulator_desc(BUCK6),
 513         s5m8767_regulator_desc(BUCK7),
 514         s5m8767_regulator_desc(BUCK8),
 515         s5m8767_regulator_desc(BUCK9),
 516 };
 517
 518 static __devinit int s5m8767_pmic_probe(struct platform_device *pdev)
 519 {
 520         struct s5m87xx_dev *iodev = dev_get_drvdata(pdev->dev.parent);
 521         struct s5m_platform_data *pdata = dev_get_platdata(iodev->dev);
 522         struct regulator_config config = { };
 523         struct regulator_dev **rdev;
 524         struct s5m8767_info *s5m8767;
 525         int i, ret, size;
 526
 527         if (!pdata) {
 528                 dev_err(pdev->dev.parent, "Platform data not supplied\n");
 529                 return -ENODEV;
 530         }
 531
 532         if (pdata->buck2_gpiodvs) {
 533                 if (pdata->buck3_gpiodvs || pdata->buck4_gpiodvs) {
 534                         dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n");
 535                         return -EINVAL;
 536                 }
 537         }
 538
 539         if (pdata->buck3_gpiodvs) {
 540                 if (pdata->buck2_gpiodvs || pdata->buck4_gpiodvs) {
 541                         dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n");
 542                         return -EINVAL;
 543                 }
 544         }
 545
 546         if (pdata->buck4_gpiodvs) {
 547                 if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs) {
 548                         dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n");
 549                         return -EINVAL;
 550                 }
 551         }
 552
 553         s5m8767 = devm_kzalloc(&pdev->dev, sizeof(struct s5m8767_info),
 554                                 GFP_KERNEL);
 555         if (!s5m8767)
 556                 return -ENOMEM;
 557
 558         size = sizeof(struct regulator_dev *) * (S5M8767_REG_MAX - 2);
 559         s5m8767->rdev = devm_kzalloc(&pdev->dev, size, GFP_KERNEL);
 560         if (!s5m8767->rdev)
 561                 return -ENOMEM;
 562
 563         rdev = s5m8767->rdev;
 564         s5m8767->dev = &pdev->dev;
 565         s5m8767->iodev = iodev;
 566         s5m8767->num_regulators = S5M8767_REG_MAX - 2;
 567         platform_set_drvdata(pdev, s5m8767);
 568
 569         s5m8767->buck_gpioindex = pdata->buck_default_idx;
 570         s5m8767->buck2_gpiodvs = pdata->buck2_gpiodvs;
 571         s5m8767->buck3_gpiodvs = pdata->buck3_gpiodvs;
 572         s5m8767->buck4_gpiodvs = pdata->buck4_gpiodvs;
 573         s5m8767->buck_gpios[0] = pdata->buck_gpios[0];
 574         s5m8767->buck_gpios[1] = pdata->buck_gpios[1];
 575         s5m8767->buck_gpios[2] = pdata->buck_gpios[2];
 576         s5m8767->ramp_delay = pdata->buck_ramp_delay;
 577         s5m8767->buck2_ramp = pdata->buck2_ramp_enable;
 578         s5m8767->buck3_ramp = pdata->buck3_ramp_enable;
 579         s5m8767->buck4_ramp = pdata->buck4_ramp_enable;
 580         s5m8767->opmode = pdata->opmode;
 581
 582         for (i = 0; i < 8; i++) {
 583                 if (s5m8767->buck2_gpiodvs) {
 584                         s5m8767->buck2_vol[i] =
 585                                 s5m8767_convert_voltage_to_sel(
 586                                                 &buck_voltage_val2,
 587                                                 pdata->buck2_voltage[i],
 588                                                 pdata->buck2_voltage[i] +
 589                                                 buck_voltage_val2.step);
 590                 }
 591
 592                 if (s5m8767->buck3_gpiodvs) {
 593                         s5m8767->buck3_vol[i] =
 594                                 s5m8767_convert_voltage_to_sel(
 595                                                 &buck_voltage_val2,
 596                                                 pdata->buck3_voltage[i],
 597                                                 pdata->buck3_voltage[i] +
 598                                                 buck_voltage_val2.step);
 599                 }
 600
 601                 if (s5m8767->buck4_gpiodvs) {
 602                         s5m8767->buck4_vol[i] =
 603                                 s5m8767_convert_voltage_to_sel(
 604                                                 &buck_voltage_val2,
 605                                                 pdata->buck4_voltage[i],
 606                                                 pdata->buck4_voltage[i] +
 607                                                 buck_voltage_val2.step);
 608                 }
 609         }
 610
 611         if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs ||
 612                 pdata->buck4_gpiodvs) {
 613                 if (gpio_is_valid(pdata->buck_gpios[0]) &&
 614                         gpio_is_valid(pdata->buck_gpios[1]) &&
 615                         gpio_is_valid(pdata->buck_gpios[2])) {
 616                         ret = gpio_request(pdata->buck_gpios[0],
 617                                                 "S5M8767 SET1");
 618                         if (ret == -EBUSY)
 619                                 dev_warn(&pdev->dev, "Duplicated gpio request for SET1\n");
 620
 621                         ret = gpio_request(pdata->buck_gpios[1],
 622                                            "S5M8767 SET2");
 623                         if (ret == -EBUSY)
 624                                 dev_warn(&pdev->dev, "Duplicated gpio request for SET2\n");
 625
 626                         ret = gpio_request(pdata->buck_gpios[2],
 627                                            "S5M8767 SET3");
 628                         if (ret == -EBUSY)
 629                                 dev_warn(&pdev->dev, "Duplicated gpio request for SET3\n");
 630                         /* SET1 GPIO */
 631                         gpio_direction_output(pdata->buck_gpios[0],
 632                                         (s5m8767->buck_gpioindex >> 2) & 0x1);
 633                         /* SET2 GPIO */
 634                         gpio_direction_output(pdata->buck_gpios[1],
 635                                         (s5m8767->buck_gpioindex >> 1) & 0x1);
 636                         /* SET3 GPIO */
 637                         gpio_direction_output(pdata->buck_gpios[2],
 638                                         (s5m8767->buck_gpioindex >> 0) & 0x1);
 639                         ret = 0;
 640                 } else {
 641                         dev_err(&pdev->dev, "GPIO NOT VALID\n");
 642                         ret = -EINVAL;
 643                         return ret;
 644                 }
 645         }
 646
 647         s5m_reg_update(s5m8767->iodev, S5M8767_REG_BUCK2CTRL,
 648                         (pdata->buck2_gpiodvs) ? (1 << 1) : (0 << 1), 1 << 1);
 649         s5m_reg_update(s5m8767->iodev, S5M8767_REG_BUCK3CTRL,
 650                         (pdata->buck3_gpiodvs) ? (1 << 1) : (0 << 1), 1 << 1);
 651         s5m_reg_update(s5m8767->iodev, S5M8767_REG_BUCK4CTRL,
 652                         (pdata->buck4_gpiodvs) ? (1 << 1) : (0 << 1), 1 << 1);
 653
 654         /* Initialize GPIO DVS registers */
 655         for (i = 0; i < 8; i++) {
 656                 if (s5m8767->buck2_gpiodvs) {
 657                         s5m_reg_write(s5m8767->iodev, S5M8767_REG_BUCK2DVS1 + i,
 658                                            s5m8767->buck2_vol[i]);
 659                 }
 660
 661                 if (s5m8767->buck3_gpiodvs) {
 662                         s5m_reg_write(s5m8767->iodev, S5M8767_REG_BUCK3DVS1 + i,
 663                                            s5m8767->buck3_vol[i]);
 664                 }
 665
 666                 if (s5m8767->buck4_gpiodvs) {
 667                         s5m_reg_write(s5m8767->iodev, S5M8767_REG_BUCK4DVS1 + i,
 668                                            s5m8767->buck4_vol[i]);
 669                 }
 670         }
 671         s5m_reg_update(s5m8767->iodev, S5M8767_REG_BUCK2CTRL, 0x78, 0xff);
 672         s5m_reg_update(s5m8767->iodev, S5M8767_REG_BUCK3CTRL, 0x58, 0xff);
 673         s5m_reg_update(s5m8767->iodev, S5M8767_REG_BUCK4CTRL, 0x78, 0xff);
 674
 675         if (s5m8767->buck2_ramp)
 676                 s5m_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP, 0x08, 0x08);
 677
 678         if (s5m8767->buck3_ramp)
 679                 s5m_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP, 0x04, 0x04);
 680
 681         if (s5m8767->buck4_ramp)
 682                 s5m_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP, 0x02, 0x02);
 683
 684         if (s5m8767->buck2_ramp || s5m8767->buck3_ramp
 685                 || s5m8767->buck4_ramp) {
 686                 switch (s5m8767->ramp_delay) {
 687                 case 15:
 688                         s5m_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP,
 689                                         0xc0, 0xf0);
 690                         break;
 691                 case 25:
 692                         s5m_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP,
 693                                         0xd0, 0xf0);
 694                         break;
 695                 case 50:
 696                         s5m_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP,
 697                                         0xe0, 0xf0);
 698                         break;
 699                 case 100:
 700                         s5m_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP,
 701                                         0xf0, 0xf0);
 702                         break;
 703                 default:
 704                         s5m_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP,
 705                                         0x90, 0xf0);
 706                 }
 707         }
 708
 709         for (i = 0; i < pdata->num_regulators; i++) {
 710                 const struct s5m_voltage_desc *desc;
 711                 int id = pdata->regulators[i].id;
 712
 713                 desc = reg_voltage_map[id];
 714                 if (desc)
 715                         regulators[id].n_voltages =
 716                                 (desc->max - desc->min) / desc->step + 1;
 717
 718                 config.dev = s5m8767->dev;
 719                 config.init_data = pdata->regulators[i].initdata;
 720                 config.driver_data = s5m8767;
 721
 722                 rdev[i] = regulator_register(&regulators[id], &config);
 723                 if (IS_ERR(rdev[i])) {
 724                         ret = PTR_ERR(rdev[i]);
 725                         dev_err(s5m8767->dev, "regulator init failed for %d\n",
 726                                         id);
 727                         rdev[i] = NULL;
 728                         goto err;
 729                 }
 730         }
 731
 732         return 0;
 733 err:
 734         for (i = 0; i < s5m8767->num_regulators; i++)
 735                 if (rdev[i])
 736                         regulator_unregister(rdev[i]);
 737
 738         return ret;
 739 }
 740
 741 static int __devexit s5m8767_pmic_remove(struct platform_device *pdev)
 742 {
 743         struct s5m8767_info *s5m8767 = platform_get_drvdata(pdev);
 744         struct regulator_dev **rdev = s5m8767->rdev;
 745         int i;
 746
 747         for (i = 0; i < s5m8767->num_regulators; i++)
 748                 if (rdev[i])
 749                         regulator_unregister(rdev[i]);
 750
 751         return 0;
 752 }
 753
 754 static const struct platform_device_id s5m8767_pmic_id[] = {
 755         { "s5m8767-pmic", 0},
 756         { },
 757 };
 758 MODULE_DEVICE_TABLE(platform, s5m8767_pmic_id);
 759
 760 static struct platform_driver s5m8767_pmic_driver = {
 761         .driver = {
 762                 .name = "s5m8767-pmic",
 763                 .owner = THIS_MODULE,
 764         },
 765         .probe = s5m8767_pmic_probe,
 766         .remove = __devexit_p(s5m8767_pmic_remove),
 767         .id_table = s5m8767_pmic_id,
 768 };
 769
 770 static int __init s5m8767_pmic_init(void)
 771 {
 772         return platform_driver_register(&s5m8767_pmic_driver);
 773 }
 774 subsys_initcall(s5m8767_pmic_init);
 775
 776 static void __exit s5m8767_pmic_exit(void)
 777 {
 778         platform_driver_unregister(&s5m8767_pmic_driver);
 779 }
 780 module_exit(s5m8767_pmic_exit);
 781
 782 /* Module information */
 783 MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
 784 MODULE_DESCRIPTION("SAMSUNG S5M8767 Regulator Driver");
 785 MODULE_LICENSE("GPL");