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/of_gpio.h>
  18 #include <linux/slab.h>
  19 #include <linux/module.h>
  20 #include <linux/platform_device.h>
  21 #include <linux/regulator/driver.h>
  22 #include <linux/regulator/machine.h>
  23 #include <linux/mfd/samsung/core.h>
  24 #include <linux/mfd/samsung/s5m8767.h>
  25 #include <linux/regulator/of_regulator.h>
  26 #include <linux/regmap.h>
  27
  28 #define S5M8767_OPMODE_NORMAL_MODE 0x1
  29
  30 struct s5m8767_info {
  31         struct device *dev;
  32         struct sec_pmic_dev *iodev;
  33         int num_regulators;
  34         struct regulator_dev **rdev;
  35         struct sec_opmode_data *opmode;
  36
  37         int ramp_delay;
  38         bool buck2_ramp;
  39         bool buck3_ramp;
  40         bool buck4_ramp;
  41
  42         bool buck2_gpiodvs;
  43         bool buck3_gpiodvs;
  44         bool buck4_gpiodvs;
  45         u8 buck2_vol[8];
  46         u8 buck3_vol[8];
  47         u8 buck4_vol[8];
  48         int buck_gpios[3];
  49         int buck_ds[3];
  50         int buck_gpioindex;
  51 };
  52
  53 struct sec_voltage_desc {
  54         int max;
  55         int min;
  56         int step;
  57 };
  58
  59 static const struct sec_voltage_desc buck_voltage_val1 = {
  60         .max = 2225000,
  61         .min =  650000,
  62         .step =   6250,
  63 };
  64
  65 static const struct sec_voltage_desc buck_voltage_val2 = {
  66         .max = 1600000,
  67         .min =  600000,
  68         .step =   6250,
  69 };
  70
  71 static const struct sec_voltage_desc buck_voltage_val3 = {
  72         .max = 3000000,
  73         .min =  750000,
  74         .step =  12500,
  75 };
  76
  77 static const struct sec_voltage_desc ldo_voltage_val1 = {
  78         .max = 3950000,
  79         .min =  800000,
  80         .step =  50000,
  81 };
  82
  83 static const struct sec_voltage_desc ldo_voltage_val2 = {
  84         .max = 2375000,
  85         .min =  800000,
  86         .step =  25000,
  87 };
  88
  89 static const struct sec_voltage_desc *reg_voltage_map[] = {
  90         [S5M8767_LDO1] = &ldo_voltage_val2,
  91         [S5M8767_LDO2] = &ldo_voltage_val2,
  92         [S5M8767_LDO3] = &ldo_voltage_val1,
  93         [S5M8767_LDO4] = &ldo_voltage_val1,
  94         [S5M8767_LDO5] = &ldo_voltage_val1,
  95         [S5M8767_LDO6] = &ldo_voltage_val2,
  96         [S5M8767_LDO7] = &ldo_voltage_val2,
  97         [S5M8767_LDO8] = &ldo_voltage_val2,
  98         [S5M8767_LDO9] = &ldo_voltage_val1,
  99         [S5M8767_LDO10] = &ldo_voltage_val1,
 100         [S5M8767_LDO11] = &ldo_voltage_val1,
 101         [S5M8767_LDO12] = &ldo_voltage_val1,
 102         [S5M8767_LDO13] = &ldo_voltage_val1,
 103         [S5M8767_LDO14] = &ldo_voltage_val1,
 104         [S5M8767_LDO15] = &ldo_voltage_val2,
 105         [S5M8767_LDO16] = &ldo_voltage_val1,
 106         [S5M8767_LDO17] = &ldo_voltage_val1,
 107         [S5M8767_LDO18] = &ldo_voltage_val1,
 108         [S5M8767_LDO19] = &ldo_voltage_val1,
 109         [S5M8767_LDO20] = &ldo_voltage_val1,
 110         [S5M8767_LDO21] = &ldo_voltage_val1,
 111         [S5M8767_LDO22] = &ldo_voltage_val1,
 112         [S5M8767_LDO23] = &ldo_voltage_val1,
 113         [S5M8767_LDO24] = &ldo_voltage_val1,
 114         [S5M8767_LDO25] = &ldo_voltage_val1,
 115         [S5M8767_LDO26] = &ldo_voltage_val1,
 116         [S5M8767_LDO27] = &ldo_voltage_val1,
 117         [S5M8767_LDO28] = &ldo_voltage_val1,
 118         [S5M8767_BUCK1] = &buck_voltage_val1,
 119         [S5M8767_BUCK2] = &buck_voltage_val2,
 120         [S5M8767_BUCK3] = &buck_voltage_val2,
 121         [S5M8767_BUCK4] = &buck_voltage_val2,
 122         [S5M8767_BUCK5] = &buck_voltage_val1,
 123         [S5M8767_BUCK6] = &buck_voltage_val1,
 124         [S5M8767_BUCK7] = &buck_voltage_val3,
 125         [S5M8767_BUCK8] = &buck_voltage_val3,
 126         [S5M8767_BUCK9] = &buck_voltage_val3,
 127 };
 128
 129 static unsigned int s5m8767_opmode_reg[][4] = {
 130         /* {OFF, ON, LOWPOWER, SUSPEND} */
 131         /* LDO1 ... LDO28 */
 132         {0x0, 0x3, 0x2, 0x1}, /* LDO1 */
 133         {0x0, 0x3, 0x2, 0x1},
 134         {0x0, 0x3, 0x2, 0x1},
 135         {0x0, 0x0, 0x0, 0x0},
 136         {0x0, 0x3, 0x2, 0x1}, /* LDO5 */
 137         {0x0, 0x3, 0x2, 0x1},
 138         {0x0, 0x3, 0x2, 0x1},
 139         {0x0, 0x3, 0x2, 0x1},
 140         {0x0, 0x3, 0x2, 0x1},
 141         {0x0, 0x3, 0x2, 0x1}, /* LDO10 */
 142         {0x0, 0x3, 0x2, 0x1},
 143         {0x0, 0x3, 0x2, 0x1},
 144         {0x0, 0x3, 0x2, 0x1},
 145         {0x0, 0x3, 0x2, 0x1},
 146         {0x0, 0x3, 0x2, 0x1}, /* LDO15 */
 147         {0x0, 0x3, 0x2, 0x1},
 148         {0x0, 0x3, 0x2, 0x1},
 149         {0x0, 0x0, 0x0, 0x0},
 150         {0x0, 0x3, 0x2, 0x1},
 151         {0x0, 0x3, 0x2, 0x1}, /* LDO20 */
 152         {0x0, 0x3, 0x2, 0x1},
 153         {0x0, 0x3, 0x2, 0x1},
 154         {0x0, 0x0, 0x0, 0x0},
 155         {0x0, 0x3, 0x2, 0x1},
 156         {0x0, 0x3, 0x2, 0x1}, /* LDO25 */
 157         {0x0, 0x3, 0x2, 0x1},
 158         {0x0, 0x3, 0x2, 0x1},
 159         {0x0, 0x3, 0x2, 0x1}, /* LDO28 */
 160
 161         /* BUCK1 ... BUCK9 */
 162         {0x0, 0x3, 0x1, 0x1}, /* BUCK1 */
 163         {0x0, 0x3, 0x1, 0x1},
 164         {0x0, 0x3, 0x1, 0x1},
 165         {0x0, 0x3, 0x1, 0x1},
 166         {0x0, 0x3, 0x2, 0x1}, /* BUCK5 */
 167         {0x0, 0x3, 0x1, 0x1},
 168         {0x0, 0x3, 0x1, 0x1},
 169         {0x0, 0x3, 0x1, 0x1},
 170         {0x0, 0x3, 0x1, 0x1}, /* BUCK9 */
 171 };
 172
 173 static int s5m8767_get_register(struct regulator_dev *rdev, int *reg,
 174                                 int *enable_ctrl)
 175 {
 176         int i, reg_id = rdev_get_id(rdev);
 177         unsigned int mode;
 178         struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
 179
 180         switch (reg_id) {
 181         case S5M8767_LDO1 ... S5M8767_LDO2:
 182                 *reg = S5M8767_REG_LDO1CTRL + (reg_id - S5M8767_LDO1);
 183                 break;
 184         case S5M8767_LDO3 ... S5M8767_LDO28:
 185                 *reg = S5M8767_REG_LDO3CTRL + (reg_id - S5M8767_LDO3);
 186                 break;
 187         case S5M8767_BUCK1:
 188                 *reg = S5M8767_REG_BUCK1CTRL1;
 189                 break;
 190         case S5M8767_BUCK2 ... S5M8767_BUCK4:
 191                 *reg = S5M8767_REG_BUCK2CTRL + (reg_id - S5M8767_BUCK2) * 9;
 192                 break;
 193         case S5M8767_BUCK5:
 194                 *reg = S5M8767_REG_BUCK5CTRL1;
 195                 break;
 196         case S5M8767_BUCK6 ... S5M8767_BUCK9:
 197                 *reg = S5M8767_REG_BUCK6CTRL1 + (reg_id - S5M8767_BUCK6) * 2;
 198                 break;
 199         default:
 200                 return -EINVAL;
 201         }
 202
 203         for (i = 0; i < s5m8767->num_regulators; i++) {
 204                 if (s5m8767->opmode[i].id == reg_id) {
 205                         mode = s5m8767->opmode[i].mode;
 206                         break;
 207                 }
 208         }
 209
 210         if (i < s5m8767->num_regulators)
 211                 *enable_ctrl =
 212                 s5m8767_opmode_reg[reg_id][mode] << S5M8767_ENCTRL_SHIFT;
 213
 214         return 0;
 215 }
 216
 217 static int s5m8767_reg_is_enabled(struct regulator_dev *rdev)
 218 {
 219         struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
 220         int ret, reg;
 221         int enable_ctrl;
 222         unsigned int val;
 223
 224         ret = s5m8767_get_register(rdev, &reg, &enable_ctrl);
 225         if (ret == -EINVAL)
 226                 return 1;
 227         else if (ret)
 228                 return ret;
 229
 230         ret = regmap_read(s5m8767->iodev->regmap_pmic, reg, &val);
 231         if (ret)
 232                 return ret;
 233
 234         return (val & S5M8767_ENCTRL_MASK) == enable_ctrl;
 235 }
 236
 237 static int s5m8767_reg_enable(struct regulator_dev *rdev)
 238 {
 239         struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
 240         int ret, reg;
 241         int enable_ctrl;
 242
 243         ret = s5m8767_get_register(rdev, &reg, &enable_ctrl);
 244         if (ret)
 245                 return ret;
 246
 247         return regmap_update_bits(s5m8767->iodev->regmap_pmic, reg,
 248                         S5M8767_ENCTRL_MASK, enable_ctrl);
 249 }
 250
 251 static int s5m8767_reg_disable(struct regulator_dev *rdev)
 252 {
 253         struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
 254         int ret, reg, enable_ctrl;
 255
 256         ret = s5m8767_get_register(rdev, &reg, &enable_ctrl);
 257         if (ret)
 258                 return ret;
 259
 260         return regmap_update_bits(s5m8767->iodev->regmap_pmic, reg,
 261                         S5M8767_ENCTRL_MASK, ~S5M8767_ENCTRL_MASK);
 262 }
 263
 264 static int s5m8767_get_vsel_reg(int reg_id, struct s5m8767_info *s5m8767)
 265 {
 266         int reg;
 267
 268         switch (reg_id) {
 269         case S5M8767_LDO1 ... S5M8767_LDO2:
 270                 reg = S5M8767_REG_LDO1CTRL + (reg_id - S5M8767_LDO1);
 271                 break;
 272         case S5M8767_LDO3 ... S5M8767_LDO28:
 273                 reg = S5M8767_REG_LDO3CTRL + (reg_id - S5M8767_LDO3);
 274                 break;
 275         case S5M8767_BUCK1:
 276                 reg = S5M8767_REG_BUCK1CTRL2;
 277                 break;
 278         case S5M8767_BUCK2:
 279                 reg = S5M8767_REG_BUCK2DVS1;
 280                 if (s5m8767->buck2_gpiodvs)
 281                         reg += s5m8767->buck_gpioindex;
 282                 break;
 283         case S5M8767_BUCK3:
 284                 reg = S5M8767_REG_BUCK3DVS1;
 285                 if (s5m8767->buck3_gpiodvs)
 286                         reg += s5m8767->buck_gpioindex;
 287                 break;
 288         case S5M8767_BUCK4:
 289                 reg = S5M8767_REG_BUCK4DVS1;
 290                 if (s5m8767->buck4_gpiodvs)
 291                         reg += s5m8767->buck_gpioindex;
 292                 break;
 293         case S5M8767_BUCK5:
 294                 reg = S5M8767_REG_BUCK5CTRL2;
 295                 break;
 296         case S5M8767_BUCK6 ... S5M8767_BUCK9:
 297                 reg = S5M8767_REG_BUCK6CTRL2 + (reg_id - S5M8767_BUCK6) * 2;
 298                 break;
 299         default:
 300                 return -EINVAL;
 301         }
 302
 303         return reg;
 304 }
 305
 306 static int s5m8767_convert_voltage_to_sel(const struct sec_voltage_desc *desc,
 307                                           int min_vol)
 308 {
 309         int selector = 0;
 310
 311         if (desc == NULL)
 312                 return -EINVAL;
 313
 314         if (min_vol > desc->max)
 315                 return -EINVAL;
 316
 317         if (min_vol < desc->min)
 318                 min_vol = desc->min;
 319
 320         selector = DIV_ROUND_UP(min_vol - desc->min, desc->step);
 321
 322         if (desc->min + desc->step * selector > desc->max)
 323                 return -EINVAL;
 324
 325         return selector;
 326 }
 327
 328 static inline int s5m8767_set_high(struct s5m8767_info *s5m8767)
 329 {
 330         int temp_index = s5m8767->buck_gpioindex;
 331
 332         gpio_set_value(s5m8767->buck_gpios[0], (temp_index >> 2) & 0x1);
 333         gpio_set_value(s5m8767->buck_gpios[1], (temp_index >> 1) & 0x1);
 334         gpio_set_value(s5m8767->buck_gpios[2], temp_index & 0x1);
 335
 336         return 0;
 337 }
 338
 339 static inline int s5m8767_set_low(struct s5m8767_info *s5m8767)
 340 {
 341         int temp_index = s5m8767->buck_gpioindex;
 342
 343         gpio_set_value(s5m8767->buck_gpios[2], temp_index & 0x1);
 344         gpio_set_value(s5m8767->buck_gpios[1], (temp_index >> 1) & 0x1);
 345         gpio_set_value(s5m8767->buck_gpios[0], (temp_index >> 2) & 0x1);
 346
 347         return 0;
 348 }
 349
 350 static int s5m8767_set_voltage_sel(struct regulator_dev *rdev,
 351                                    unsigned selector)
 352 {
 353         struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
 354         int reg_id = rdev_get_id(rdev);
 355         int old_index, index = 0;
 356         u8 *buck234_vol = NULL;
 357
 358         switch (reg_id) {
 359         case S5M8767_LDO1 ... S5M8767_LDO28:
 360                 break;
 361         case S5M8767_BUCK1 ... S5M8767_BUCK6:
 362                 if (reg_id == S5M8767_BUCK2 && s5m8767->buck2_gpiodvs)
 363                         buck234_vol = &s5m8767->buck2_vol[0];
 364                 else if (reg_id == S5M8767_BUCK3 && s5m8767->buck3_gpiodvs)
 365                         buck234_vol = &s5m8767->buck3_vol[0];
 366                 else if (reg_id == S5M8767_BUCK4 && s5m8767->buck4_gpiodvs)
 367                         buck234_vol = &s5m8767->buck4_vol[0];
 368                 break;
 369         case S5M8767_BUCK7 ... S5M8767_BUCK8:
 370                 return -EINVAL;
 371         case S5M8767_BUCK9:
 372                 break;
 373         default:
 374                 return -EINVAL;
 375         }
 376
 377         /* buck234_vol != NULL means to control buck234 voltage via DVS GPIO */
 378         if (buck234_vol) {
 379                 while (*buck234_vol != selector) {
 380                         buck234_vol++;
 381                         index++;
 382                 }
 383                 old_index = s5m8767->buck_gpioindex;
 384                 s5m8767->buck_gpioindex = index;
 385
 386                 if (index > old_index)
 387                         return s5m8767_set_high(s5m8767);
 388                 else
 389                         return s5m8767_set_low(s5m8767);
 390         } else {
 391                 return regulator_set_voltage_sel_regmap(rdev, selector);
 392         }
 393 }
 394
 395 static int s5m8767_set_voltage_time_sel(struct regulator_dev *rdev,
 396                                              unsigned int old_sel,
 397                                              unsigned int new_sel)
 398 {
 399         struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
 400         const struct sec_voltage_desc *desc;
 401         int reg_id = rdev_get_id(rdev);
 402
 403         desc = reg_voltage_map[reg_id];
 404
 405         if ((old_sel < new_sel) && s5m8767->ramp_delay)
 406                 return DIV_ROUND_UP(desc->step * (new_sel - old_sel),
 407                                         s5m8767->ramp_delay * 1000);
 408         return 0;
 409 }
 410
 411 static struct regulator_ops s5m8767_ops = {
 412         .list_voltage           = regulator_list_voltage_linear,
 413         .is_enabled             = s5m8767_reg_is_enabled,
 414         .enable                 = s5m8767_reg_enable,
 415         .disable                = s5m8767_reg_disable,
 416         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 417         .set_voltage_sel        = s5m8767_set_voltage_sel,
 418         .set_voltage_time_sel   = s5m8767_set_voltage_time_sel,
 419 };
 420
 421 static struct regulator_ops s5m8767_buck78_ops = {
 422         .list_voltage           = regulator_list_voltage_linear,
 423         .is_enabled             = s5m8767_reg_is_enabled,
 424         .enable                 = s5m8767_reg_enable,
 425         .disable                = s5m8767_reg_disable,
 426         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 427         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 428 };
 429
 430 #define s5m8767_regulator_desc(_name) {         \
 431         .name           = #_name,               \
 432         .id             = S5M8767_##_name,      \
 433         .ops            = &s5m8767_ops,         \
 434         .type           = REGULATOR_VOLTAGE,    \
 435         .owner          = THIS_MODULE,          \
 436 }
 437
 438 #define s5m8767_regulator_buck78_desc(_name) {  \
 439         .name           = #_name,               \
 440         .id             = S5M8767_##_name,      \
 441         .ops            = &s5m8767_buck78_ops,  \
 442         .type           = REGULATOR_VOLTAGE,    \
 443         .owner          = THIS_MODULE,          \
 444 }
 445
 446 static struct regulator_desc regulators[] = {
 447         s5m8767_regulator_desc(LDO1),
 448         s5m8767_regulator_desc(LDO2),
 449         s5m8767_regulator_desc(LDO3),
 450         s5m8767_regulator_desc(LDO4),
 451         s5m8767_regulator_desc(LDO5),
 452         s5m8767_regulator_desc(LDO6),
 453         s5m8767_regulator_desc(LDO7),
 454         s5m8767_regulator_desc(LDO8),
 455         s5m8767_regulator_desc(LDO9),
 456         s5m8767_regulator_desc(LDO10),
 457         s5m8767_regulator_desc(LDO11),
 458         s5m8767_regulator_desc(LDO12),
 459         s5m8767_regulator_desc(LDO13),
 460         s5m8767_regulator_desc(LDO14),
 461         s5m8767_regulator_desc(LDO15),
 462         s5m8767_regulator_desc(LDO16),
 463         s5m8767_regulator_desc(LDO17),
 464         s5m8767_regulator_desc(LDO18),
 465         s5m8767_regulator_desc(LDO19),
 466         s5m8767_regulator_desc(LDO20),
 467         s5m8767_regulator_desc(LDO21),
 468         s5m8767_regulator_desc(LDO22),
 469         s5m8767_regulator_desc(LDO23),
 470         s5m8767_regulator_desc(LDO24),
 471         s5m8767_regulator_desc(LDO25),
 472         s5m8767_regulator_desc(LDO26),
 473         s5m8767_regulator_desc(LDO27),
 474         s5m8767_regulator_desc(LDO28),
 475         s5m8767_regulator_desc(BUCK1),
 476         s5m8767_regulator_desc(BUCK2),
 477         s5m8767_regulator_desc(BUCK3),
 478         s5m8767_regulator_desc(BUCK4),
 479         s5m8767_regulator_desc(BUCK5),
 480         s5m8767_regulator_desc(BUCK6),
 481         s5m8767_regulator_buck78_desc(BUCK7),
 482         s5m8767_regulator_buck78_desc(BUCK8),
 483         s5m8767_regulator_desc(BUCK9),
 484 };
 485
 486 #ifdef CONFIG_OF
 487 static int s5m8767_pmic_dt_parse_dvs_gpio(struct sec_pmic_dev *iodev,
 488                         struct sec_platform_data *pdata,
 489                         struct device_node *pmic_np)
 490 {
 491         int i, gpio;
 492
 493         for (i = 0; i < 3; i++) {
 494                 gpio = of_get_named_gpio(pmic_np,
 495                                         "s5m8767,pmic-buck-dvs-gpios", i);
 496                 if (!gpio_is_valid(gpio)) {
 497                         dev_err(iodev->dev, "invalid gpio[%d]: %d\n", i, gpio);
 498                         return -EINVAL;
 499                 }
 500                 pdata->buck_gpios[i] = gpio;
 501         }
 502         return 0;
 503 }
 504
 505 static int s5m8767_pmic_dt_parse_ds_gpio(struct sec_pmic_dev *iodev,
 506                         struct sec_platform_data *pdata,
 507                         struct device_node *pmic_np)
 508 {
 509         int i, gpio;
 510
 511         for (i = 0; i < 3; i++) {
 512                 gpio = of_get_named_gpio(pmic_np,
 513                                         "s5m8767,pmic-buck-ds-gpios", i);
 514                 if (!gpio_is_valid(gpio)) {
 515                         dev_err(iodev->dev, "invalid gpio[%d]: %d\n", i, gpio);
 516                         return -EINVAL;
 517                 }
 518                 pdata->buck_ds[i] = gpio;
 519         }
 520         return 0;
 521 }
 522
 523 static int s5m8767_pmic_dt_parse_pdata(struct platform_device *pdev,
 524                                         struct sec_platform_data *pdata)
 525 {
 526         struct sec_pmic_dev *iodev = dev_get_drvdata(pdev->dev.parent);
 527         struct device_node *pmic_np, *regulators_np, *reg_np;
 528         struct sec_regulator_data *rdata;
 529         struct sec_opmode_data *rmode;
 530         unsigned int i, dvs_voltage_nr = 8, ret;
 531
 532         pmic_np = iodev->dev->of_node;
 533         if (!pmic_np) {
 534                 dev_err(iodev->dev, "could not find pmic sub-node\n");
 535                 return -ENODEV;
 536         }
 537
 538         regulators_np = of_find_node_by_name(pmic_np, "regulators");
 539         if (!regulators_np) {
 540                 dev_err(iodev->dev, "could not find regulators sub-node\n");
 541                 return -EINVAL;
 542         }
 543
 544         /* count the number of regulators to be supported in pmic */
 545         pdata->num_regulators = of_get_child_count(regulators_np);
 546
 547         rdata = devm_kzalloc(&pdev->dev, sizeof(*rdata) *
 548                                 pdata->num_regulators, GFP_KERNEL);
 549         if (!rdata) {
 550                 dev_err(iodev->dev,
 551                         "could not allocate memory for regulator data\n");
 552                 return -ENOMEM;
 553         }
 554
 555         rmode = devm_kzalloc(&pdev->dev, sizeof(*rmode) *
 556                                 pdata->num_regulators, GFP_KERNEL);
 557         if (!rmode) {
 558                 dev_err(iodev->dev,
 559                         "could not allocate memory for regulator mode\n");
 560                 return -ENOMEM;
 561         }
 562
 563         pdata->regulators = rdata;
 564         pdata->opmode = rmode;
 565         for_each_child_of_node(regulators_np, reg_np) {
 566                 for (i = 0; i < ARRAY_SIZE(regulators); i++)
 567                         if (!of_node_cmp(reg_np->name, regulators[i].name))
 568                                 break;
 569
 570                 if (i == ARRAY_SIZE(regulators)) {
 571                         dev_warn(iodev->dev,
 572                         "don't know how to configure regulator %s\n",
 573                         reg_np->name);
 574                         continue;
 575                 }
 576
 577                 rdata->id = i;
 578                 rdata->initdata = of_get_regulator_init_data(
 579                                                 &pdev->dev, reg_np);
 580                 rdata->reg_node = reg_np;
 581                 rdata++;
 582                 rmode->id = i;
 583                 if (of_property_read_u32(reg_np, "op_mode",
 584                                 &rmode->mode)) {
 585                         dev_warn(iodev->dev,
 586                                 "no op_mode property property at %s\n",
 587                                 reg_np->full_name);
 588
 589                         rmode->mode = S5M8767_OPMODE_NORMAL_MODE;
 590                 }
 591                 rmode++;
 592         }
 593
 594         if (of_get_property(pmic_np, "s5m8767,pmic-buck2-uses-gpio-dvs", NULL)) {
 595                 pdata->buck2_gpiodvs = true;
 596
 597                 if (of_property_read_u32_array(pmic_np,
 598                                 "s5m8767,pmic-buck2-dvs-voltage",
 599                                 pdata->buck2_voltage, dvs_voltage_nr)) {
 600                         dev_err(iodev->dev, "buck2 voltages not specified\n");
 601                         return -EINVAL;
 602                 }
 603         }
 604
 605         if (of_get_property(pmic_np, "s5m8767,pmic-buck3-uses-gpio-dvs", NULL)) {
 606                 pdata->buck3_gpiodvs = true;
 607
 608                 if (of_property_read_u32_array(pmic_np,
 609                                 "s5m8767,pmic-buck3-dvs-voltage",
 610                                 pdata->buck3_voltage, dvs_voltage_nr)) {
 611                         dev_err(iodev->dev, "buck3 voltages not specified\n");
 612                         return -EINVAL;
 613                 }
 614         }
 615
 616         if (of_get_property(pmic_np, "s5m8767,pmic-buck4-uses-gpio-dvs", NULL)) {
 617                 pdata->buck4_gpiodvs = true;
 618
 619                 if (of_property_read_u32_array(pmic_np,
 620                                 "s5m8767,pmic-buck4-dvs-voltage",
 621                                 pdata->buck4_voltage, dvs_voltage_nr)) {
 622                         dev_err(iodev->dev, "buck4 voltages not specified\n");
 623                         return -EINVAL;
 624                 }
 625         }
 626
 627         if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs ||
 628                                                 pdata->buck4_gpiodvs) {
 629                 ret = s5m8767_pmic_dt_parse_dvs_gpio(iodev, pdata, pmic_np);
 630                 if (ret)
 631                         return -EINVAL;
 632
 633                 if (of_property_read_u32(pmic_np,
 634                                 "s5m8767,pmic-buck-default-dvs-idx",
 635                                 &pdata->buck_default_idx)) {
 636                         pdata->buck_default_idx = 0;
 637                 } else {
 638                         if (pdata->buck_default_idx >= 8) {
 639                                 pdata->buck_default_idx = 0;
 640                                 dev_info(iodev->dev,
 641                                 "invalid value for default dvs index, use 0\n");
 642                         }
 643                 }
 644         }
 645
 646         ret = s5m8767_pmic_dt_parse_ds_gpio(iodev, pdata, pmic_np);
 647         if (ret)
 648                 return -EINVAL;
 649
 650         if (of_get_property(pmic_np, "s5m8767,pmic-buck2-ramp-enable", NULL))
 651                 pdata->buck2_ramp_enable = true;
 652
 653         if (of_get_property(pmic_np, "s5m8767,pmic-buck3-ramp-enable", NULL))
 654                 pdata->buck3_ramp_enable = true;
 655
 656         if (of_get_property(pmic_np, "s5m8767,pmic-buck4-ramp-enable", NULL))
 657                 pdata->buck4_ramp_enable = true;
 658
 659         if (pdata->buck2_ramp_enable || pdata->buck3_ramp_enable
 660                         || pdata->buck4_ramp_enable) {
 661                 if (of_property_read_u32(pmic_np, "s5m8767,pmic-buck-ramp-delay",
 662                                 &pdata->buck_ramp_delay))
 663                         pdata->buck_ramp_delay = 0;
 664         }
 665
 666         return 0;
 667 }
 668 #else
 669 static int s5m8767_pmic_dt_parse_pdata(struct platform_device *pdev,
 670                                         struct sec_platform_data *pdata)
 671 {
 672         return 0;
 673 }
 674 #endif /* CONFIG_OF */
 675
 676 static int s5m8767_pmic_probe(struct platform_device *pdev)
 677 {
 678         struct sec_pmic_dev *iodev = dev_get_drvdata(pdev->dev.parent);
 679         struct sec_platform_data *pdata = iodev->pdata;
 680         struct regulator_config config = { };
 681         struct regulator_dev **rdev;
 682         struct s5m8767_info *s5m8767;
 683         int i, ret, size, buck_init;
 684
 685         if (!pdata) {
 686                 dev_err(pdev->dev.parent, "Platform data not supplied\n");
 687                 return -ENODEV;
 688         }
 689
 690         if (iodev->dev->of_node) {
 691                 ret = s5m8767_pmic_dt_parse_pdata(pdev, pdata);
 692                 if (ret)
 693                         return ret;
 694         }
 695
 696         if (pdata->buck2_gpiodvs) {
 697                 if (pdata->buck3_gpiodvs || pdata->buck4_gpiodvs) {
 698                         dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n");
 699                         return -EINVAL;
 700                 }
 701         }
 702
 703         if (pdata->buck3_gpiodvs) {
 704                 if (pdata->buck2_gpiodvs || pdata->buck4_gpiodvs) {
 705                         dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n");
 706                         return -EINVAL;
 707                 }
 708         }
 709
 710         if (pdata->buck4_gpiodvs) {
 711                 if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs) {
 712                         dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n");
 713                         return -EINVAL;
 714                 }
 715         }
 716
 717         s5m8767 = devm_kzalloc(&pdev->dev, sizeof(struct s5m8767_info),
 718                                 GFP_KERNEL);
 719         if (!s5m8767)
 720                 return -ENOMEM;
 721
 722         size = sizeof(struct regulator_dev *) * (S5M8767_REG_MAX - 2);
 723         s5m8767->rdev = devm_kzalloc(&pdev->dev, size, GFP_KERNEL);
 724         if (!s5m8767->rdev)
 725                 return -ENOMEM;
 726
 727         rdev = s5m8767->rdev;
 728         s5m8767->dev = &pdev->dev;
 729         s5m8767->iodev = iodev;
 730         s5m8767->num_regulators = pdata->num_regulators;
 731         platform_set_drvdata(pdev, s5m8767);
 732
 733         s5m8767->buck_gpioindex = pdata->buck_default_idx;
 734         s5m8767->buck2_gpiodvs = pdata->buck2_gpiodvs;
 735         s5m8767->buck3_gpiodvs = pdata->buck3_gpiodvs;
 736         s5m8767->buck4_gpiodvs = pdata->buck4_gpiodvs;
 737         s5m8767->buck_gpios[0] = pdata->buck_gpios[0];
 738         s5m8767->buck_gpios[1] = pdata->buck_gpios[1];
 739         s5m8767->buck_gpios[2] = pdata->buck_gpios[2];
 740         s5m8767->buck_ds[0] = pdata->buck_ds[0];
 741         s5m8767->buck_ds[1] = pdata->buck_ds[1];
 742         s5m8767->buck_ds[2] = pdata->buck_ds[2];
 743
 744         s5m8767->ramp_delay = pdata->buck_ramp_delay;
 745         s5m8767->buck2_ramp = pdata->buck2_ramp_enable;
 746         s5m8767->buck3_ramp = pdata->buck3_ramp_enable;
 747         s5m8767->buck4_ramp = pdata->buck4_ramp_enable;
 748         s5m8767->opmode = pdata->opmode;
 749
 750         buck_init = s5m8767_convert_voltage_to_sel(&buck_voltage_val2,
 751                                                    pdata->buck2_init);
 752
 753         regmap_write(s5m8767->iodev->regmap_pmic, S5M8767_REG_BUCK2DVS2,
 754                         buck_init);
 755
 756         buck_init = s5m8767_convert_voltage_to_sel(&buck_voltage_val2,
 757                                                    pdata->buck3_init);
 758
 759         regmap_write(s5m8767->iodev->regmap_pmic, S5M8767_REG_BUCK3DVS2,
 760                         buck_init);
 761
 762         buck_init = s5m8767_convert_voltage_to_sel(&buck_voltage_val2,
 763                                                    pdata->buck4_init);
 764
 765         regmap_write(s5m8767->iodev->regmap_pmic, S5M8767_REG_BUCK4DVS2,
 766                         buck_init);
 767
 768         for (i = 0; i < 8; i++) {
 769                 if (s5m8767->buck2_gpiodvs) {
 770                         s5m8767->buck2_vol[i] =
 771                                 s5m8767_convert_voltage_to_sel(
 772                                                 &buck_voltage_val2,
 773                                                 pdata->buck2_voltage[i]);
 774                 }
 775
 776                 if (s5m8767->buck3_gpiodvs) {
 777                         s5m8767->buck3_vol[i] =
 778                                 s5m8767_convert_voltage_to_sel(
 779                                                 &buck_voltage_val2,
 780                                                 pdata->buck3_voltage[i]);
 781                 }
 782
 783                 if (s5m8767->buck4_gpiodvs) {
 784                         s5m8767->buck4_vol[i] =
 785                                 s5m8767_convert_voltage_to_sel(
 786                                                 &buck_voltage_val2,
 787                                                 pdata->buck4_voltage[i]);
 788                 }
 789         }
 790
 791         if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs ||
 792                                                 pdata->buck4_gpiodvs) {
 793
 794                 if (!gpio_is_valid(pdata->buck_gpios[0]) ||
 795                         !gpio_is_valid(pdata->buck_gpios[1]) ||
 796                         !gpio_is_valid(pdata->buck_gpios[2])) {
 797                         dev_err(&pdev->dev, "GPIO NOT VALID\n");
 798                         return -EINVAL;
 799                 }
 800
 801                 ret = devm_gpio_request(&pdev->dev, pdata->buck_gpios[0],
 802                                         "S5M8767 SET1");
 803                 if (ret)
 804                         return ret;
 805
 806                 ret = devm_gpio_request(&pdev->dev, pdata->buck_gpios[1],
 807                                         "S5M8767 SET2");
 808                 if (ret)
 809                         return ret;
 810
 811                 ret = devm_gpio_request(&pdev->dev, pdata->buck_gpios[2],
 812                                         "S5M8767 SET3");
 813                 if (ret)
 814                         return ret;
 815
 816                 /* SET1 GPIO */
 817                 gpio_direction_output(pdata->buck_gpios[0],
 818                                 (s5m8767->buck_gpioindex >> 2) & 0x1);
 819                 /* SET2 GPIO */
 820                 gpio_direction_output(pdata->buck_gpios[1],
 821                                 (s5m8767->buck_gpioindex >> 1) & 0x1);
 822                 /* SET3 GPIO */
 823                 gpio_direction_output(pdata->buck_gpios[2],
 824                                 (s5m8767->buck_gpioindex >> 0) & 0x1);
 825         }
 826
 827         ret = devm_gpio_request(&pdev->dev, pdata->buck_ds[0], "S5M8767 DS2");
 828         if (ret)
 829                 return ret;
 830
 831         ret = devm_gpio_request(&pdev->dev, pdata->buck_ds[1], "S5M8767 DS3");
 832         if (ret)
 833                 return ret;
 834
 835         ret = devm_gpio_request(&pdev->dev, pdata->buck_ds[2], "S5M8767 DS4");
 836         if (ret)
 837                 return ret;
 838
 839         /* DS2 GPIO */
 840         gpio_direction_output(pdata->buck_ds[0], 0x0);
 841         /* DS3 GPIO */
 842         gpio_direction_output(pdata->buck_ds[1], 0x0);
 843         /* DS4 GPIO */
 844         gpio_direction_output(pdata->buck_ds[2], 0x0);
 845
 846         if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs ||
 847            pdata->buck4_gpiodvs) {
 848                 regmap_update_bits(s5m8767->iodev->regmap_pmic,
 849                                 S5M8767_REG_BUCK2CTRL, 1 << 1,
 850                                 (pdata->buck2_gpiodvs) ? (1 << 1) : (0 << 1));
 851                 regmap_update_bits(s5m8767->iodev->regmap_pmic,
 852                                 S5M8767_REG_BUCK3CTRL, 1 << 1,
 853                                 (pdata->buck3_gpiodvs) ? (1 << 1) : (0 << 1));
 854                 regmap_update_bits(s5m8767->iodev->regmap_pmic,
 855                                 S5M8767_REG_BUCK4CTRL, 1 << 1,
 856                                 (pdata->buck4_gpiodvs) ? (1 << 1) : (0 << 1));
 857         }
 858
 859         /* Initialize GPIO DVS registers */
 860         for (i = 0; i < 8; i++) {
 861                 if (s5m8767->buck2_gpiodvs) {
 862                         regmap_write(s5m8767->iodev->regmap_pmic,
 863                                         S5M8767_REG_BUCK2DVS1 + i,
 864                                         s5m8767->buck2_vol[i]);
 865                 }
 866
 867                 if (s5m8767->buck3_gpiodvs) {
 868                         regmap_write(s5m8767->iodev->regmap_pmic,
 869                                         S5M8767_REG_BUCK3DVS1 + i,
 870                                         s5m8767->buck3_vol[i]);
 871                 }
 872
 873                 if (s5m8767->buck4_gpiodvs) {
 874                         regmap_write(s5m8767->iodev->regmap_pmic,
 875                                         S5M8767_REG_BUCK4DVS1 + i,
 876                                         s5m8767->buck4_vol[i]);
 877                 }
 878         }
 879
 880         if (s5m8767->buck2_ramp)
 881                 regmap_update_bits(s5m8767->iodev->regmap_pmic,
 882                                 S5M8767_REG_DVSRAMP, 0x08, 0x08);
 883
 884         if (s5m8767->buck3_ramp)
 885                 regmap_update_bits(s5m8767->iodev->regmap_pmic,
 886                                 S5M8767_REG_DVSRAMP, 0x04, 0x04);
 887
 888         if (s5m8767->buck4_ramp)
 889                 regmap_update_bits(s5m8767->iodev->regmap_pmic,
 890                                 S5M8767_REG_DVSRAMP, 0x02, 0x02);
 891
 892         if (s5m8767->buck2_ramp || s5m8767->buck3_ramp
 893                 || s5m8767->buck4_ramp) {
 894                 unsigned int val;
 895                 switch (s5m8767->ramp_delay) {
 896                 case 5:
 897                         val = S5M8767_DVS_BUCK_RAMP_5;
 898                         break;
 899                 case 10:
 900                         val = S5M8767_DVS_BUCK_RAMP_10;
 901                         break;
 902                 case 25:
 903                         val = S5M8767_DVS_BUCK_RAMP_25;
 904                         break;
 905                 case 50:
 906                         val = S5M8767_DVS_BUCK_RAMP_50;
 907                         break;
 908                 case 100:
 909                         val = S5M8767_DVS_BUCK_RAMP_100;
 910                         break;
 911                 default:
 912                         val = S5M8767_DVS_BUCK_RAMP_10;
 913                 }
 914                 regmap_update_bits(s5m8767->iodev->regmap_pmic,
 915                                         S5M8767_REG_DVSRAMP,
 916                                         S5M8767_DVS_BUCK_RAMP_MASK,
 917                                         val << S5M8767_DVS_BUCK_RAMP_SHIFT);
 918         }
 919
 920         for (i = 0; i < pdata->num_regulators; i++) {
 921                 const struct sec_voltage_desc *desc;
 922                 int id = pdata->regulators[i].id;
 923
 924                 desc = reg_voltage_map[id];
 925                 if (desc) {
 926                         regulators[id].n_voltages =
 927                                 (desc->max - desc->min) / desc->step + 1;
 928                         regulators[id].min_uV = desc->min;
 929                         regulators[id].uV_step = desc->step;
 930                         regulators[id].vsel_reg =
 931                                 s5m8767_get_vsel_reg(id, s5m8767);
 932                         if (id < S5M8767_BUCK1)
 933                                 regulators[id].vsel_mask = 0x3f;
 934                         else
 935                                 regulators[id].vsel_mask = 0xff;
 936                 }
 937
 938                 config.dev = s5m8767->dev;
 939                 config.init_data = pdata->regulators[i].initdata;
 940                 config.driver_data = s5m8767;
 941                 config.regmap = iodev->regmap_pmic;
 942                 config.of_node = pdata->regulators[i].reg_node;
 943
 944                 rdev[i] = devm_regulator_register(&pdev->dev, &regulators[id],
 945                                                   &config);
 946                 if (IS_ERR(rdev[i])) {
 947                         ret = PTR_ERR(rdev[i]);
 948                         dev_err(s5m8767->dev, "regulator init failed for %d\n",
 949                                         id);
 950                         return ret;
 951                 }
 952         }
 953
 954         return 0;
 955 }
 956
 957 static const struct platform_device_id s5m8767_pmic_id[] = {
 958         { "s5m8767-pmic", 0},
 959         { },
 960 };
 961 MODULE_DEVICE_TABLE(platform, s5m8767_pmic_id);
 962
 963 static struct platform_driver s5m8767_pmic_driver = {
 964         .driver = {
 965                 .name = "s5m8767-pmic",
 966                 .owner = THIS_MODULE,
 967         },
 968         .probe = s5m8767_pmic_probe,
 969         .id_table = s5m8767_pmic_id,
 970 };
 971
 972 static int __init s5m8767_pmic_init(void)
 973 {
 974         return platform_driver_register(&s5m8767_pmic_driver);
 975 }
 976 subsys_initcall(s5m8767_pmic_init);
 977
 978 static void __exit s5m8767_pmic_exit(void)
 979 {
 980         platform_driver_unregister(&s5m8767_pmic_driver);
 981 }
 982 module_exit(s5m8767_pmic_exit);
 983
 984 /* Module information */
 985 MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
 986 MODULE_DESCRIPTION("SAMSUNG S5M8767 Regulator Driver");
 987 MODULE_LICENSE("GPL");