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/err.h>
  15 #include <linux/of_gpio.h>
  16 #include <linux/gpio/consumer.h>
  17 #include <linux/module.h>
  18 #include <linux/platform_device.h>
  19 #include <linux/regulator/driver.h>
  20 #include <linux/regulator/machine.h>
  21 #include <linux/mfd/samsung/core.h>
  22 #include <linux/mfd/samsung/s5m8767.h>
  23 #include <linux/regulator/of_regulator.h>
  24 #include <linux/regmap.h>
  25
  26 #define S5M8767_OPMODE_NORMAL_MODE 0x1
  27
  28 struct s5m8767_info {
  29         struct device *dev;
  30         struct sec_pmic_dev *iodev;
  31         int num_regulators;
  32         struct sec_opmode_data *opmode;
  33
  34         int ramp_delay;
  35         bool buck2_ramp;
  36         bool buck3_ramp;
  37         bool buck4_ramp;
  38
  39         bool buck2_gpiodvs;
  40         bool buck3_gpiodvs;
  41         bool buck4_gpiodvs;
  42         u8 buck2_vol[8];
  43         u8 buck3_vol[8];
  44         u8 buck4_vol[8];
  45         int buck_gpios[3];
  46         int buck_ds[3];
  47         int buck_gpioindex;
  48 };
  49
  50 struct sec_voltage_desc {
  51         int max;
  52         int min;
  53         int step;
  54 };
  55
  56 static const struct sec_voltage_desc buck_voltage_val1 = {
  57         .max = 2225000,
  58         .min =  650000,
  59         .step =   6250,
  60 };
  61
  62 static const struct sec_voltage_desc buck_voltage_val2 = {
  63         .max = 1600000,
  64         .min =  600000,
  65         .step =   6250,
  66 };
  67
  68 static const struct sec_voltage_desc buck_voltage_val3 = {
  69         .max = 3000000,
  70         .min =  750000,
  71         .step =  12500,
  72 };
  73
  74 static const struct sec_voltage_desc ldo_voltage_val1 = {
  75         .max = 3950000,
  76         .min =  800000,
  77         .step =  50000,
  78 };
  79
  80 static const struct sec_voltage_desc ldo_voltage_val2 = {
  81         .max = 2375000,
  82         .min =  800000,
  83         .step =  25000,
  84 };
  85
  86 static const struct sec_voltage_desc *reg_voltage_map[] = {
  87         [S5M8767_LDO1] = &ldo_voltage_val2,
  88         [S5M8767_LDO2] = &ldo_voltage_val2,
  89         [S5M8767_LDO3] = &ldo_voltage_val1,
  90         [S5M8767_LDO4] = &ldo_voltage_val1,
  91         [S5M8767_LDO5] = &ldo_voltage_val1,
  92         [S5M8767_LDO6] = &ldo_voltage_val2,
  93         [S5M8767_LDO7] = &ldo_voltage_val2,
  94         [S5M8767_LDO8] = &ldo_voltage_val2,
  95         [S5M8767_LDO9] = &ldo_voltage_val1,
  96         [S5M8767_LDO10] = &ldo_voltage_val1,
  97         [S5M8767_LDO11] = &ldo_voltage_val1,
  98         [S5M8767_LDO12] = &ldo_voltage_val1,
  99         [S5M8767_LDO13] = &ldo_voltage_val1,
 100         [S5M8767_LDO14] = &ldo_voltage_val1,
 101         [S5M8767_LDO15] = &ldo_voltage_val2,
 102         [S5M8767_LDO16] = &ldo_voltage_val1,
 103         [S5M8767_LDO17] = &ldo_voltage_val1,
 104         [S5M8767_LDO18] = &ldo_voltage_val1,
 105         [S5M8767_LDO19] = &ldo_voltage_val1,
 106         [S5M8767_LDO20] = &ldo_voltage_val1,
 107         [S5M8767_LDO21] = &ldo_voltage_val1,
 108         [S5M8767_LDO22] = &ldo_voltage_val1,
 109         [S5M8767_LDO23] = &ldo_voltage_val1,
 110         [S5M8767_LDO24] = &ldo_voltage_val1,
 111         [S5M8767_LDO25] = &ldo_voltage_val1,
 112         [S5M8767_LDO26] = &ldo_voltage_val1,
 113         [S5M8767_LDO27] = &ldo_voltage_val1,
 114         [S5M8767_LDO28] = &ldo_voltage_val1,
 115         [S5M8767_BUCK1] = &buck_voltage_val1,
 116         [S5M8767_BUCK2] = &buck_voltage_val2,
 117         [S5M8767_BUCK3] = &buck_voltage_val2,
 118         [S5M8767_BUCK4] = &buck_voltage_val2,
 119         [S5M8767_BUCK5] = &buck_voltage_val1,
 120         [S5M8767_BUCK6] = &buck_voltage_val1,
 121         [S5M8767_BUCK7] = &buck_voltage_val3,
 122         [S5M8767_BUCK8] = &buck_voltage_val3,
 123         [S5M8767_BUCK9] = &buck_voltage_val3,
 124 };
 125
 126 static unsigned int s5m8767_opmode_reg[][4] = {
 127         /* {OFF, ON, LOWPOWER, SUSPEND} */
 128         /* LDO1 ... LDO28 */
 129         {0x0, 0x3, 0x2, 0x1}, /* LDO1 */
 130         {0x0, 0x3, 0x2, 0x1},
 131         {0x0, 0x3, 0x2, 0x1},
 132         {0x0, 0x0, 0x0, 0x0},
 133         {0x0, 0x3, 0x2, 0x1}, /* LDO5 */
 134         {0x0, 0x3, 0x2, 0x1},
 135         {0x0, 0x3, 0x2, 0x1},
 136         {0x0, 0x3, 0x2, 0x1},
 137         {0x0, 0x3, 0x2, 0x1},
 138         {0x0, 0x3, 0x2, 0x1}, /* LDO10 */
 139         {0x0, 0x3, 0x2, 0x1},
 140         {0x0, 0x3, 0x2, 0x1},
 141         {0x0, 0x3, 0x2, 0x1},
 142         {0x0, 0x3, 0x2, 0x1},
 143         {0x0, 0x3, 0x2, 0x1}, /* LDO15 */
 144         {0x0, 0x3, 0x2, 0x1},
 145         {0x0, 0x3, 0x2, 0x1},
 146         {0x0, 0x0, 0x0, 0x0},
 147         {0x0, 0x3, 0x2, 0x1},
 148         {0x0, 0x3, 0x2, 0x1}, /* LDO20 */
 149         {0x0, 0x3, 0x2, 0x1},
 150         {0x0, 0x3, 0x2, 0x1},
 151         {0x0, 0x0, 0x0, 0x0},
 152         {0x0, 0x3, 0x2, 0x1},
 153         {0x0, 0x3, 0x2, 0x1}, /* LDO25 */
 154         {0x0, 0x3, 0x2, 0x1},
 155         {0x0, 0x3, 0x2, 0x1},
 156         {0x0, 0x3, 0x2, 0x1}, /* LDO28 */
 157
 158         /* BUCK1 ... BUCK9 */
 159         {0x0, 0x3, 0x1, 0x1}, /* BUCK1 */
 160         {0x0, 0x3, 0x1, 0x1},
 161         {0x0, 0x3, 0x1, 0x1},
 162         {0x0, 0x3, 0x1, 0x1},
 163         {0x0, 0x3, 0x2, 0x1}, /* BUCK5 */
 164         {0x0, 0x3, 0x1, 0x1},
 165         {0x0, 0x3, 0x1, 0x1},
 166         {0x0, 0x3, 0x1, 0x1},
 167         {0x0, 0x3, 0x1, 0x1}, /* BUCK9 */
 168 };
 169
 170 static int s5m8767_get_register(struct s5m8767_info *s5m8767, int reg_id,
 171                                 int *reg, int *enable_ctrl)
 172 {
 173         int i;
 174         unsigned int mode;
 175
 176         switch (reg_id) {
 177         case S5M8767_LDO1 ... S5M8767_LDO2:
 178                 *reg = S5M8767_REG_LDO1CTRL + (reg_id - S5M8767_LDO1);
 179                 break;
 180         case S5M8767_LDO3 ... S5M8767_LDO28:
 181                 *reg = S5M8767_REG_LDO3CTRL + (reg_id - S5M8767_LDO3);
 182                 break;
 183         case S5M8767_BUCK1:
 184                 *reg = S5M8767_REG_BUCK1CTRL1;
 185                 break;
 186         case S5M8767_BUCK2 ... S5M8767_BUCK4:
 187                 *reg = S5M8767_REG_BUCK2CTRL + (reg_id - S5M8767_BUCK2) * 9;
 188                 break;
 189         case S5M8767_BUCK5:
 190                 *reg = S5M8767_REG_BUCK5CTRL1;
 191                 break;
 192         case S5M8767_BUCK6 ... S5M8767_BUCK9:
 193                 *reg = S5M8767_REG_BUCK6CTRL1 + (reg_id - S5M8767_BUCK6) * 2;
 194                 break;
 195         default:
 196                 return -EINVAL;
 197         }
 198
 199         for (i = 0; i < s5m8767->num_regulators; i++) {
 200                 if (s5m8767->opmode[i].id == reg_id) {
 201                         mode = s5m8767->opmode[i].mode;
 202                         break;
 203                 }
 204         }
 205
 206         if (i >= s5m8767->num_regulators)
 207                 return -EINVAL;
 208
 209         *enable_ctrl = s5m8767_opmode_reg[reg_id][mode] << S5M8767_ENCTRL_SHIFT;
 210
 211         return 0;
 212 }
 213
 214 static int s5m8767_get_vsel_reg(int reg_id, struct s5m8767_info *s5m8767)
 215 {
 216         int reg;
 217
 218         switch (reg_id) {
 219         case S5M8767_LDO1 ... S5M8767_LDO2:
 220                 reg = S5M8767_REG_LDO1CTRL + (reg_id - S5M8767_LDO1);
 221                 break;
 222         case S5M8767_LDO3 ... S5M8767_LDO28:
 223                 reg = S5M8767_REG_LDO3CTRL + (reg_id - S5M8767_LDO3);
 224                 break;
 225         case S5M8767_BUCK1:
 226                 reg = S5M8767_REG_BUCK1CTRL2;
 227                 break;
 228         case S5M8767_BUCK2:
 229                 reg = S5M8767_REG_BUCK2DVS1;
 230                 if (s5m8767->buck2_gpiodvs)
 231                         reg += s5m8767->buck_gpioindex;
 232                 break;
 233         case S5M8767_BUCK3:
 234                 reg = S5M8767_REG_BUCK3DVS1;
 235                 if (s5m8767->buck3_gpiodvs)
 236                         reg += s5m8767->buck_gpioindex;
 237                 break;
 238         case S5M8767_BUCK4:
 239                 reg = S5M8767_REG_BUCK4DVS1;
 240                 if (s5m8767->buck4_gpiodvs)
 241                         reg += s5m8767->buck_gpioindex;
 242                 break;
 243         case S5M8767_BUCK5:
 244                 reg = S5M8767_REG_BUCK5CTRL2;
 245                 break;
 246         case S5M8767_BUCK6 ... S5M8767_BUCK9:
 247                 reg = S5M8767_REG_BUCK6CTRL2 + (reg_id - S5M8767_BUCK6) * 2;
 248                 break;
 249         default:
 250                 return -EINVAL;
 251         }
 252
 253         return reg;
 254 }
 255
 256 static int s5m8767_convert_voltage_to_sel(const struct sec_voltage_desc *desc,
 257                                           int min_vol)
 258 {
 259         int selector = 0;
 260
 261         if (desc == NULL)
 262                 return -EINVAL;
 263
 264         if (min_vol > desc->max)
 265                 return -EINVAL;
 266
 267         if (min_vol < desc->min)
 268                 min_vol = desc->min;
 269
 270         selector = DIV_ROUND_UP(min_vol - desc->min, desc->step);
 271
 272         if (desc->min + desc->step * selector > desc->max)
 273                 return -EINVAL;
 274
 275         return selector;
 276 }
 277
 278 static inline int s5m8767_set_high(struct s5m8767_info *s5m8767)
 279 {
 280         int temp_index = s5m8767->buck_gpioindex;
 281
 282         gpio_set_value(s5m8767->buck_gpios[0], (temp_index >> 2) & 0x1);
 283         gpio_set_value(s5m8767->buck_gpios[1], (temp_index >> 1) & 0x1);
 284         gpio_set_value(s5m8767->buck_gpios[2], temp_index & 0x1);
 285
 286         return 0;
 287 }
 288
 289 static inline int s5m8767_set_low(struct s5m8767_info *s5m8767)
 290 {
 291         int temp_index = s5m8767->buck_gpioindex;
 292
 293         gpio_set_value(s5m8767->buck_gpios[2], temp_index & 0x1);
 294         gpio_set_value(s5m8767->buck_gpios[1], (temp_index >> 1) & 0x1);
 295         gpio_set_value(s5m8767->buck_gpios[0], (temp_index >> 2) & 0x1);
 296
 297         return 0;
 298 }
 299
 300 static int s5m8767_set_voltage_sel(struct regulator_dev *rdev,
 301                                    unsigned selector)
 302 {
 303         struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
 304         int reg_id = rdev_get_id(rdev);
 305         int old_index, index = 0;
 306         u8 *buck234_vol = NULL;
 307
 308         switch (reg_id) {
 309         case S5M8767_LDO1 ... S5M8767_LDO28:
 310                 break;
 311         case S5M8767_BUCK1 ... S5M8767_BUCK6:
 312                 if (reg_id == S5M8767_BUCK2 && s5m8767->buck2_gpiodvs)
 313                         buck234_vol = &s5m8767->buck2_vol[0];
 314                 else if (reg_id == S5M8767_BUCK3 && s5m8767->buck3_gpiodvs)
 315                         buck234_vol = &s5m8767->buck3_vol[0];
 316                 else if (reg_id == S5M8767_BUCK4 && s5m8767->buck4_gpiodvs)
 317                         buck234_vol = &s5m8767->buck4_vol[0];
 318                 break;
 319         case S5M8767_BUCK7 ... S5M8767_BUCK8:
 320                 return -EINVAL;
 321         case S5M8767_BUCK9:
 322                 break;
 323         default:
 324                 return -EINVAL;
 325         }
 326
 327         /* buck234_vol != NULL means to control buck234 voltage via DVS GPIO */
 328         if (buck234_vol) {
 329                 while (*buck234_vol != selector) {
 330                         buck234_vol++;
 331                         index++;
 332                 }
 333                 old_index = s5m8767->buck_gpioindex;
 334                 s5m8767->buck_gpioindex = index;
 335
 336                 if (index > old_index)
 337                         return s5m8767_set_high(s5m8767);
 338                 else
 339                         return s5m8767_set_low(s5m8767);
 340         } else {
 341                 return regulator_set_voltage_sel_regmap(rdev, selector);
 342         }
 343 }
 344
 345 static int s5m8767_set_voltage_time_sel(struct regulator_dev *rdev,
 346                                              unsigned int old_sel,
 347                                              unsigned int new_sel)
 348 {
 349         struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
 350         const struct sec_voltage_desc *desc;
 351         int reg_id = rdev_get_id(rdev);
 352
 353         desc = reg_voltage_map[reg_id];
 354
 355         if ((old_sel < new_sel) && s5m8767->ramp_delay)
 356                 return DIV_ROUND_UP(desc->step * (new_sel - old_sel),
 357                                         s5m8767->ramp_delay * 1000);
 358         return 0;
 359 }
 360
 361 static const struct regulator_ops s5m8767_ops = {
 362         .list_voltage           = regulator_list_voltage_linear,
 363         .is_enabled             = regulator_is_enabled_regmap,
 364         .enable                 = regulator_enable_regmap,
 365         .disable                = regulator_disable_regmap,
 366         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 367         .set_voltage_sel        = s5m8767_set_voltage_sel,
 368         .set_voltage_time_sel   = s5m8767_set_voltage_time_sel,
 369 };
 370
 371 static const struct regulator_ops s5m8767_buck78_ops = {
 372         .list_voltage           = regulator_list_voltage_linear,
 373         .is_enabled             = regulator_is_enabled_regmap,
 374         .enable                 = regulator_enable_regmap,
 375         .disable                = regulator_disable_regmap,
 376         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 377         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 378 };
 379
 380 #define s5m8767_regulator_desc(_name) {         \
 381         .name           = #_name,               \
 382         .id             = S5M8767_##_name,      \
 383         .ops            = &s5m8767_ops,         \
 384         .type           = REGULATOR_VOLTAGE,    \
 385         .owner          = THIS_MODULE,          \
 386 }
 387
 388 #define s5m8767_regulator_buck78_desc(_name) {  \
 389         .name           = #_name,               \
 390         .id             = S5M8767_##_name,      \
 391         .ops            = &s5m8767_buck78_ops,  \
 392         .type           = REGULATOR_VOLTAGE,    \
 393         .owner          = THIS_MODULE,          \
 394 }
 395
 396 static struct regulator_desc regulators[] = {
 397         s5m8767_regulator_desc(LDO1),
 398         s5m8767_regulator_desc(LDO2),
 399         s5m8767_regulator_desc(LDO3),
 400         s5m8767_regulator_desc(LDO4),
 401         s5m8767_regulator_desc(LDO5),
 402         s5m8767_regulator_desc(LDO6),
 403         s5m8767_regulator_desc(LDO7),
 404         s5m8767_regulator_desc(LDO8),
 405         s5m8767_regulator_desc(LDO9),
 406         s5m8767_regulator_desc(LDO10),
 407         s5m8767_regulator_desc(LDO11),
 408         s5m8767_regulator_desc(LDO12),
 409         s5m8767_regulator_desc(LDO13),
 410         s5m8767_regulator_desc(LDO14),
 411         s5m8767_regulator_desc(LDO15),
 412         s5m8767_regulator_desc(LDO16),
 413         s5m8767_regulator_desc(LDO17),
 414         s5m8767_regulator_desc(LDO18),
 415         s5m8767_regulator_desc(LDO19),
 416         s5m8767_regulator_desc(LDO20),
 417         s5m8767_regulator_desc(LDO21),
 418         s5m8767_regulator_desc(LDO22),
 419         s5m8767_regulator_desc(LDO23),
 420         s5m8767_regulator_desc(LDO24),
 421         s5m8767_regulator_desc(LDO25),
 422         s5m8767_regulator_desc(LDO26),
 423         s5m8767_regulator_desc(LDO27),
 424         s5m8767_regulator_desc(LDO28),
 425         s5m8767_regulator_desc(BUCK1),
 426         s5m8767_regulator_desc(BUCK2),
 427         s5m8767_regulator_desc(BUCK3),
 428         s5m8767_regulator_desc(BUCK4),
 429         s5m8767_regulator_desc(BUCK5),
 430         s5m8767_regulator_desc(BUCK6),
 431         s5m8767_regulator_buck78_desc(BUCK7),
 432         s5m8767_regulator_buck78_desc(BUCK8),
 433         s5m8767_regulator_desc(BUCK9),
 434 };
 435
 436 /*
 437  * Enable GPIO control over BUCK9 in regulator_config for that regulator.
 438  */
 439 static void s5m8767_regulator_config_ext_control(struct s5m8767_info *s5m8767,
 440                 struct sec_regulator_data *rdata,
 441                 struct regulator_config *config)
 442 {
 443         int i, mode = 0;
 444
 445         if (rdata->id != S5M8767_BUCK9)
 446                 return;
 447
 448         /* Check if opmode for regulator matches S5M8767_ENCTRL_USE_GPIO */
 449         for (i = 0; i < s5m8767->num_regulators; i++) {
 450                 const struct sec_opmode_data *opmode = &s5m8767->opmode[i];
 451                 if (opmode->id == rdata->id) {
 452                         mode = s5m8767_opmode_reg[rdata->id][opmode->mode];
 453                         break;
 454                 }
 455         }
 456         if (mode != S5M8767_ENCTRL_USE_GPIO) {
 457                 dev_warn(s5m8767->dev,
 458                                 "ext-control for %s: mismatched op_mode (%x), ignoring\n",
 459                                 rdata->reg_node->name, mode);
 460                 return;
 461         }
 462
 463         if (!rdata->ext_control_gpiod) {
 464                 dev_warn(s5m8767->dev,
 465                                 "ext-control for %s: GPIO not valid, ignoring\n",
 466                          rdata->reg_node->name);
 467                 return;
 468         }
 469
 470         config->ena_gpiod = rdata->ext_control_gpiod;
 471 }
 472
 473 /*
 474  * Turn on GPIO control over BUCK9.
 475  */
 476 static int s5m8767_enable_ext_control(struct s5m8767_info *s5m8767,
 477                 struct regulator_dev *rdev)
 478 {
 479         int id = rdev_get_id(rdev);
 480         int ret, reg, enable_ctrl;
 481
 482         if (id != S5M8767_BUCK9)
 483                 return -EINVAL;
 484
 485         ret = s5m8767_get_register(s5m8767, id, &reg, &enable_ctrl);
 486         if (ret)
 487                 return ret;
 488
 489         return regmap_update_bits(s5m8767->iodev->regmap_pmic,
 490                         reg, S5M8767_ENCTRL_MASK,
 491                         S5M8767_ENCTRL_USE_GPIO << S5M8767_ENCTRL_SHIFT);
 492 }
 493
 494
 495 #ifdef CONFIG_OF
 496 static int s5m8767_pmic_dt_parse_dvs_gpio(struct sec_pmic_dev *iodev,
 497                         struct sec_platform_data *pdata,
 498                         struct device_node *pmic_np)
 499 {
 500         int i, gpio;
 501
 502         for (i = 0; i < 3; i++) {
 503                 gpio = of_get_named_gpio(pmic_np,
 504                                         "s5m8767,pmic-buck-dvs-gpios", i);
 505                 if (!gpio_is_valid(gpio)) {
 506                         dev_err(iodev->dev, "invalid gpio[%d]: %d\n", i, gpio);
 507                         return -EINVAL;
 508                 }
 509                 pdata->buck_gpios[i] = gpio;
 510         }
 511         return 0;
 512 }
 513
 514 static int s5m8767_pmic_dt_parse_ds_gpio(struct sec_pmic_dev *iodev,
 515                         struct sec_platform_data *pdata,
 516                         struct device_node *pmic_np)
 517 {
 518         int i, gpio;
 519
 520         for (i = 0; i < 3; i++) {
 521                 gpio = of_get_named_gpio(pmic_np,
 522                                         "s5m8767,pmic-buck-ds-gpios", i);
 523                 if (!gpio_is_valid(gpio)) {
 524                         dev_err(iodev->dev, "invalid gpio[%d]: %d\n", i, gpio);
 525                         return -EINVAL;
 526                 }
 527                 pdata->buck_ds[i] = gpio;
 528         }
 529         return 0;
 530 }
 531
 532 static int s5m8767_pmic_dt_parse_pdata(struct platform_device *pdev,
 533                                         struct sec_platform_data *pdata)
 534 {
 535         struct sec_pmic_dev *iodev = dev_get_drvdata(pdev->dev.parent);
 536         struct device_node *pmic_np, *regulators_np, *reg_np;
 537         struct sec_regulator_data *rdata;
 538         struct sec_opmode_data *rmode;
 539         unsigned int i, dvs_voltage_nr = 8, ret;
 540
 541         pmic_np = iodev->dev->of_node;
 542         if (!pmic_np) {
 543                 dev_err(iodev->dev, "could not find pmic sub-node\n");
 544                 return -ENODEV;
 545         }
 546
 547         regulators_np = of_get_child_by_name(pmic_np, "regulators");
 548         if (!regulators_np) {
 549                 dev_err(iodev->dev, "could not find regulators sub-node\n");
 550                 return -EINVAL;
 551         }
 552
 553         /* count the number of regulators to be supported in pmic */
 554         pdata->num_regulators = of_get_child_count(regulators_np);
 555
 556         rdata = devm_kcalloc(&pdev->dev,
 557                              pdata->num_regulators, sizeof(*rdata),
 558                              GFP_KERNEL);
 559         if (!rdata)
 560                 return -ENOMEM;
 561
 562         rmode = devm_kcalloc(&pdev->dev,
 563                              pdata->num_regulators, sizeof(*rmode),
 564                              GFP_KERNEL);
 565         if (!rmode)
 566                 return -ENOMEM;
 567
 568         pdata->regulators = rdata;
 569         pdata->opmode = rmode;
 570         for_each_child_of_node(regulators_np, reg_np) {
 571                 for (i = 0; i < ARRAY_SIZE(regulators); i++)
 572                         if (!of_node_cmp(reg_np->name, regulators[i].name))
 573                                 break;
 574
 575                 if (i == ARRAY_SIZE(regulators)) {
 576                         dev_warn(iodev->dev,
 577                         "don't know how to configure regulator %s\n",
 578                         reg_np->name);
 579                         continue;
 580                 }
 581
 582                 rdata->ext_control_gpiod = devm_gpiod_get_from_of_node(&pdev->dev,
 583                                                                        reg_np,
 584                                                                        "s5m8767,pmic-ext-control-gpios",
 585                                                                        0,
 586                                                                        GPIOD_OUT_HIGH,
 587                                                                        "s5m8767");
 588                 if (IS_ERR(rdata->ext_control_gpiod))
 589                         return PTR_ERR(rdata->ext_control_gpiod);
 590
 591                 rdata->id = i;
 592                 rdata->initdata = of_get_regulator_init_data(
 593                                                 &pdev->dev, reg_np,
 594                                                 &regulators[i]);
 595                 rdata->reg_node = reg_np;
 596                 rdata++;
 597                 rmode->id = i;
 598                 if (of_property_read_u32(reg_np, "op_mode",
 599                                 &rmode->mode)) {
 600                         dev_warn(iodev->dev,
 601                                 "no op_mode property property at %pOF\n",
 602                                 reg_np);
 603
 604                         rmode->mode = S5M8767_OPMODE_NORMAL_MODE;
 605                 }
 606                 rmode++;
 607         }
 608
 609         of_node_put(regulators_np);
 610
 611         if (of_get_property(pmic_np, "s5m8767,pmic-buck2-uses-gpio-dvs", NULL)) {
 612                 pdata->buck2_gpiodvs = true;
 613
 614                 if (of_property_read_u32_array(pmic_np,
 615                                 "s5m8767,pmic-buck2-dvs-voltage",
 616                                 pdata->buck2_voltage, dvs_voltage_nr)) {
 617                         dev_err(iodev->dev, "buck2 voltages not specified\n");
 618                         return -EINVAL;
 619                 }
 620         }
 621
 622         if (of_get_property(pmic_np, "s5m8767,pmic-buck3-uses-gpio-dvs", NULL)) {
 623                 pdata->buck3_gpiodvs = true;
 624
 625                 if (of_property_read_u32_array(pmic_np,
 626                                 "s5m8767,pmic-buck3-dvs-voltage",
 627                                 pdata->buck3_voltage, dvs_voltage_nr)) {
 628                         dev_err(iodev->dev, "buck3 voltages not specified\n");
 629                         return -EINVAL;
 630                 }
 631         }
 632
 633         if (of_get_property(pmic_np, "s5m8767,pmic-buck4-uses-gpio-dvs", NULL)) {
 634                 pdata->buck4_gpiodvs = true;
 635
 636                 if (of_property_read_u32_array(pmic_np,
 637                                 "s5m8767,pmic-buck4-dvs-voltage",
 638                                 pdata->buck4_voltage, dvs_voltage_nr)) {
 639                         dev_err(iodev->dev, "buck4 voltages not specified\n");
 640                         return -EINVAL;
 641                 }
 642         }
 643
 644         if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs ||
 645                                                 pdata->buck4_gpiodvs) {
 646                 ret = s5m8767_pmic_dt_parse_dvs_gpio(iodev, pdata, pmic_np);
 647                 if (ret)
 648                         return -EINVAL;
 649
 650                 if (of_property_read_u32(pmic_np,
 651                                 "s5m8767,pmic-buck-default-dvs-idx",
 652                                 &pdata->buck_default_idx)) {
 653                         pdata->buck_default_idx = 0;
 654                 } else {
 655                         if (pdata->buck_default_idx >= 8) {
 656                                 pdata->buck_default_idx = 0;
 657                                 dev_info(iodev->dev,
 658                                 "invalid value for default dvs index, use 0\n");
 659                         }
 660                 }
 661         }
 662
 663         ret = s5m8767_pmic_dt_parse_ds_gpio(iodev, pdata, pmic_np);
 664         if (ret)
 665                 return -EINVAL;
 666
 667         if (of_get_property(pmic_np, "s5m8767,pmic-buck2-ramp-enable", NULL))
 668                 pdata->buck2_ramp_enable = true;
 669
 670         if (of_get_property(pmic_np, "s5m8767,pmic-buck3-ramp-enable", NULL))
 671                 pdata->buck3_ramp_enable = true;
 672
 673         if (of_get_property(pmic_np, "s5m8767,pmic-buck4-ramp-enable", NULL))
 674                 pdata->buck4_ramp_enable = true;
 675
 676         if (pdata->buck2_ramp_enable || pdata->buck3_ramp_enable
 677                         || pdata->buck4_ramp_enable) {
 678                 if (of_property_read_u32(pmic_np, "s5m8767,pmic-buck-ramp-delay",
 679                                 &pdata->buck_ramp_delay))
 680                         pdata->buck_ramp_delay = 0;
 681         }
 682
 683         return 0;
 684 }
 685 #else
 686 static int s5m8767_pmic_dt_parse_pdata(struct platform_device *pdev,
 687                                         struct sec_platform_data *pdata)
 688 {
 689         return 0;
 690 }
 691 #endif /* CONFIG_OF */
 692
 693 static int s5m8767_pmic_probe(struct platform_device *pdev)
 694 {
 695         struct sec_pmic_dev *iodev = dev_get_drvdata(pdev->dev.parent);
 696         struct sec_platform_data *pdata = iodev->pdata;
 697         struct regulator_config config = { };
 698         struct s5m8767_info *s5m8767;
 699         int i, ret, buck_init;
 700
 701         if (!pdata) {
 702                 dev_err(pdev->dev.parent, "Platform data not supplied\n");
 703                 return -ENODEV;
 704         }
 705
 706         if (iodev->dev->of_node) {
 707                 ret = s5m8767_pmic_dt_parse_pdata(pdev, pdata);
 708                 if (ret)
 709                         return ret;
 710         }
 711
 712         if (pdata->buck2_gpiodvs) {
 713                 if (pdata->buck3_gpiodvs || pdata->buck4_gpiodvs) {
 714                         dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n");
 715                         return -EINVAL;
 716                 }
 717         }
 718
 719         if (pdata->buck3_gpiodvs) {
 720                 if (pdata->buck2_gpiodvs || pdata->buck4_gpiodvs) {
 721                         dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n");
 722                         return -EINVAL;
 723                 }
 724         }
 725
 726         if (pdata->buck4_gpiodvs) {
 727                 if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs) {
 728                         dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n");
 729                         return -EINVAL;
 730                 }
 731         }
 732
 733         s5m8767 = devm_kzalloc(&pdev->dev, sizeof(struct s5m8767_info),
 734                                 GFP_KERNEL);
 735         if (!s5m8767)
 736                 return -ENOMEM;
 737
 738         s5m8767->dev = &pdev->dev;
 739         s5m8767->iodev = iodev;
 740         s5m8767->num_regulators = pdata->num_regulators;
 741         platform_set_drvdata(pdev, s5m8767);
 742
 743         s5m8767->buck_gpioindex = pdata->buck_default_idx;
 744         s5m8767->buck2_gpiodvs = pdata->buck2_gpiodvs;
 745         s5m8767->buck3_gpiodvs = pdata->buck3_gpiodvs;
 746         s5m8767->buck4_gpiodvs = pdata->buck4_gpiodvs;
 747         s5m8767->buck_gpios[0] = pdata->buck_gpios[0];
 748         s5m8767->buck_gpios[1] = pdata->buck_gpios[1];
 749         s5m8767->buck_gpios[2] = pdata->buck_gpios[2];
 750         s5m8767->buck_ds[0] = pdata->buck_ds[0];
 751         s5m8767->buck_ds[1] = pdata->buck_ds[1];
 752         s5m8767->buck_ds[2] = pdata->buck_ds[2];
 753
 754         s5m8767->ramp_delay = pdata->buck_ramp_delay;
 755         s5m8767->buck2_ramp = pdata->buck2_ramp_enable;
 756         s5m8767->buck3_ramp = pdata->buck3_ramp_enable;
 757         s5m8767->buck4_ramp = pdata->buck4_ramp_enable;
 758         s5m8767->opmode = pdata->opmode;
 759
 760         buck_init = s5m8767_convert_voltage_to_sel(&buck_voltage_val2,
 761                                                    pdata->buck2_init);
 762
 763         regmap_write(s5m8767->iodev->regmap_pmic, S5M8767_REG_BUCK2DVS2,
 764                         buck_init);
 765
 766         buck_init = s5m8767_convert_voltage_to_sel(&buck_voltage_val2,
 767                                                    pdata->buck3_init);
 768
 769         regmap_write(s5m8767->iodev->regmap_pmic, S5M8767_REG_BUCK3DVS2,
 770                         buck_init);
 771
 772         buck_init = s5m8767_convert_voltage_to_sel(&buck_voltage_val2,
 773                                                    pdata->buck4_init);
 774
 775         regmap_write(s5m8767->iodev->regmap_pmic, S5M8767_REG_BUCK4DVS2,
 776                         buck_init);
 777
 778         for (i = 0; i < 8; i++) {
 779                 if (s5m8767->buck2_gpiodvs) {
 780                         s5m8767->buck2_vol[i] =
 781                                 s5m8767_convert_voltage_to_sel(
 782                                                 &buck_voltage_val2,
 783                                                 pdata->buck2_voltage[i]);
 784                 }
 785
 786                 if (s5m8767->buck3_gpiodvs) {
 787                         s5m8767->buck3_vol[i] =
 788                                 s5m8767_convert_voltage_to_sel(
 789                                                 &buck_voltage_val2,
 790                                                 pdata->buck3_voltage[i]);
 791                 }
 792
 793                 if (s5m8767->buck4_gpiodvs) {
 794                         s5m8767->buck4_vol[i] =
 795                                 s5m8767_convert_voltage_to_sel(
 796                                                 &buck_voltage_val2,
 797                                                 pdata->buck4_voltage[i]);
 798                 }
 799         }
 800
 801         if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs ||
 802                                                 pdata->buck4_gpiodvs) {
 803
 804                 if (!gpio_is_valid(pdata->buck_gpios[0]) ||
 805                         !gpio_is_valid(pdata->buck_gpios[1]) ||
 806                         !gpio_is_valid(pdata->buck_gpios[2])) {
 807                         dev_err(&pdev->dev, "GPIO NOT VALID\n");
 808                         return -EINVAL;
 809                 }
 810
 811                 ret = devm_gpio_request(&pdev->dev, pdata->buck_gpios[0],
 812                                         "S5M8767 SET1");
 813                 if (ret)
 814                         return ret;
 815
 816                 ret = devm_gpio_request(&pdev->dev, pdata->buck_gpios[1],
 817                                         "S5M8767 SET2");
 818                 if (ret)
 819                         return ret;
 820
 821                 ret = devm_gpio_request(&pdev->dev, pdata->buck_gpios[2],
 822                                         "S5M8767 SET3");
 823                 if (ret)
 824                         return ret;
 825
 826                 /* SET1 GPIO */
 827                 gpio_direction_output(pdata->buck_gpios[0],
 828                                 (s5m8767->buck_gpioindex >> 2) & 0x1);
 829                 /* SET2 GPIO */
 830                 gpio_direction_output(pdata->buck_gpios[1],
 831                                 (s5m8767->buck_gpioindex >> 1) & 0x1);
 832                 /* SET3 GPIO */
 833                 gpio_direction_output(pdata->buck_gpios[2],
 834                                 (s5m8767->buck_gpioindex >> 0) & 0x1);
 835         }
 836
 837         ret = devm_gpio_request(&pdev->dev, pdata->buck_ds[0], "S5M8767 DS2");
 838         if (ret)
 839                 return ret;
 840
 841         ret = devm_gpio_request(&pdev->dev, pdata->buck_ds[1], "S5M8767 DS3");
 842         if (ret)
 843                 return ret;
 844
 845         ret = devm_gpio_request(&pdev->dev, pdata->buck_ds[2], "S5M8767 DS4");
 846         if (ret)
 847                 return ret;
 848
 849         /* DS2 GPIO */
 850         gpio_direction_output(pdata->buck_ds[0], 0x0);
 851         /* DS3 GPIO */
 852         gpio_direction_output(pdata->buck_ds[1], 0x0);
 853         /* DS4 GPIO */
 854         gpio_direction_output(pdata->buck_ds[2], 0x0);
 855
 856         if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs ||
 857            pdata->buck4_gpiodvs) {
 858                 regmap_update_bits(s5m8767->iodev->regmap_pmic,
 859                                 S5M8767_REG_BUCK2CTRL, 1 << 1,
 860                                 (pdata->buck2_gpiodvs) ? (1 << 1) : (0 << 1));
 861                 regmap_update_bits(s5m8767->iodev->regmap_pmic,
 862                                 S5M8767_REG_BUCK3CTRL, 1 << 1,
 863                                 (pdata->buck3_gpiodvs) ? (1 << 1) : (0 << 1));
 864                 regmap_update_bits(s5m8767->iodev->regmap_pmic,
 865                                 S5M8767_REG_BUCK4CTRL, 1 << 1,
 866                                 (pdata->buck4_gpiodvs) ? (1 << 1) : (0 << 1));
 867         }
 868
 869         /* Initialize GPIO DVS registers */
 870         for (i = 0; i < 8; i++) {
 871                 if (s5m8767->buck2_gpiodvs) {
 872                         regmap_write(s5m8767->iodev->regmap_pmic,
 873                                         S5M8767_REG_BUCK2DVS1 + i,
 874                                         s5m8767->buck2_vol[i]);
 875                 }
 876
 877                 if (s5m8767->buck3_gpiodvs) {
 878                         regmap_write(s5m8767->iodev->regmap_pmic,
 879                                         S5M8767_REG_BUCK3DVS1 + i,
 880                                         s5m8767->buck3_vol[i]);
 881                 }
 882
 883                 if (s5m8767->buck4_gpiodvs) {
 884                         regmap_write(s5m8767->iodev->regmap_pmic,
 885                                         S5M8767_REG_BUCK4DVS1 + i,
 886                                         s5m8767->buck4_vol[i]);
 887                 }
 888         }
 889
 890         if (s5m8767->buck2_ramp)
 891                 regmap_update_bits(s5m8767->iodev->regmap_pmic,
 892                                 S5M8767_REG_DVSRAMP, 0x08, 0x08);
 893
 894         if (s5m8767->buck3_ramp)
 895                 regmap_update_bits(s5m8767->iodev->regmap_pmic,
 896                                 S5M8767_REG_DVSRAMP, 0x04, 0x04);
 897
 898         if (s5m8767->buck4_ramp)
 899                 regmap_update_bits(s5m8767->iodev->regmap_pmic,
 900                                 S5M8767_REG_DVSRAMP, 0x02, 0x02);
 901
 902         if (s5m8767->buck2_ramp || s5m8767->buck3_ramp
 903                 || s5m8767->buck4_ramp) {
 904                 unsigned int val;
 905                 switch (s5m8767->ramp_delay) {
 906                 case 5:
 907                         val = S5M8767_DVS_BUCK_RAMP_5;
 908                         break;
 909                 case 10:
 910                         val = S5M8767_DVS_BUCK_RAMP_10;
 911                         break;
 912                 case 25:
 913                         val = S5M8767_DVS_BUCK_RAMP_25;
 914                         break;
 915                 case 50:
 916                         val = S5M8767_DVS_BUCK_RAMP_50;
 917                         break;
 918                 case 100:
 919                         val = S5M8767_DVS_BUCK_RAMP_100;
 920                         break;
 921                 default:
 922                         val = S5M8767_DVS_BUCK_RAMP_10;
 923                 }
 924                 regmap_update_bits(s5m8767->iodev->regmap_pmic,
 925                                         S5M8767_REG_DVSRAMP,
 926                                         S5M8767_DVS_BUCK_RAMP_MASK,
 927                                         val << S5M8767_DVS_BUCK_RAMP_SHIFT);
 928         }
 929
 930         for (i = 0; i < pdata->num_regulators; i++) {
 931                 const struct sec_voltage_desc *desc;
 932                 int id = pdata->regulators[i].id;
 933                 int enable_reg, enable_val;
 934                 struct regulator_dev *rdev;
 935
 936                 desc = reg_voltage_map[id];
 937                 if (desc) {
 938                         regulators[id].n_voltages =
 939                                 (desc->max - desc->min) / desc->step + 1;
 940                         regulators[id].min_uV = desc->min;
 941                         regulators[id].uV_step = desc->step;
 942                         regulators[id].vsel_reg =
 943                                 s5m8767_get_vsel_reg(id, s5m8767);
 944                         if (id < S5M8767_BUCK1)
 945                                 regulators[id].vsel_mask = 0x3f;
 946                         else
 947                                 regulators[id].vsel_mask = 0xff;
 948
 949                         ret = s5m8767_get_register(s5m8767, id, &enable_reg,
 950                                              &enable_val);
 951                         if (ret) {
 952                                 dev_err(s5m8767->dev, "error reading registers\n");
 953                                 return ret;
 954                         }
 955                         regulators[id].enable_reg = enable_reg;
 956                         regulators[id].enable_mask = S5M8767_ENCTRL_MASK;
 957                         regulators[id].enable_val = enable_val;
 958                 }
 959
 960                 config.dev = s5m8767->dev;
 961                 config.init_data = pdata->regulators[i].initdata;
 962                 config.driver_data = s5m8767;
 963                 config.regmap = iodev->regmap_pmic;
 964                 config.of_node = pdata->regulators[i].reg_node;
 965                 config.ena_gpiod = NULL;
 966                 if (pdata->regulators[i].ext_control_gpiod)
 967                         s5m8767_regulator_config_ext_control(s5m8767,
 968                                         &pdata->regulators[i], &config);
 969
 970                 rdev = devm_regulator_register(&pdev->dev, &regulators[id],
 971                                                   &config);
 972                 if (IS_ERR(rdev)) {
 973                         ret = PTR_ERR(rdev);
 974                         dev_err(s5m8767->dev, "regulator init failed for %d\n",
 975                                         id);
 976                         return ret;
 977                 }
 978
 979                 if (pdata->regulators[i].ext_control_gpiod) {
 980                         ret = s5m8767_enable_ext_control(s5m8767, rdev);
 981                         if (ret < 0) {
 982                                 dev_err(s5m8767->dev,
 983                                                 "failed to enable gpio control over %s: %d\n",
 984                                                 rdev->desc->name, ret);
 985                                 return ret;
 986                         }
 987                 }
 988         }
 989
 990         return 0;
 991 }
 992
 993 static const struct platform_device_id s5m8767_pmic_id[] = {
 994         { "s5m8767-pmic", 0},
 995         { },
 996 };
 997 MODULE_DEVICE_TABLE(platform, s5m8767_pmic_id);
 998
 999 static struct platform_driver s5m8767_pmic_driver = {
1000         .driver = {
1001                 .name = "s5m8767-pmic",
1002         },
1003         .probe = s5m8767_pmic_probe,
1004         .id_table = s5m8767_pmic_id,
1005 };
1006
1007 static int __init s5m8767_pmic_init(void)
1008 {
1009         return platform_driver_register(&s5m8767_pmic_driver);
1010 }
1011 subsys_initcall(s5m8767_pmic_init);
1012
1013 static void __exit s5m8767_pmic_exit(void)
1014 {
1015         platform_driver_unregister(&s5m8767_pmic_driver);
1016 }
1017 module_exit(s5m8767_pmic_exit);
1018
1019 /* Module information */
1020 MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
1021 MODULE_DESCRIPTION("SAMSUNG S5M8767 Regulator Driver");
1022 MODULE_LICENSE("GPL");