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