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
  27 #define S5M8767_OPMODE_NORMAL_MODE 0x1
  28
  29 struct s5m8767_info {
  30         struct device *dev;
  31         struct sec_pmic_dev *iodev;
  32         int num_regulators;
  33         struct regulator_dev **rdev;
  34         struct sec_opmode_data *opmode;
  35
  36         int ramp_delay;
  37         bool buck2_ramp;
  38         bool buck3_ramp;
  39         bool buck4_ramp;
  40
  41         bool buck2_gpiodvs;
  42         bool buck3_gpiodvs;
  43         bool buck4_gpiodvs;
  44         u8 buck2_vol[8];
  45         u8 buck3_vol[8];
  46         u8 buck4_vol[8];
  47         int buck_gpios[3];
  48         int buck_ds[3];
  49         int buck_gpioindex;
  50 };
  51
  52 struct sec_voltage_desc {
  53         int max;
  54         int min;
  55         int step;
  56 };
  57
  58 static const struct sec_voltage_desc buck_voltage_val1 = {
  59         .max = 2225000,
  60         .min =  650000,
  61         .step =   6250,
  62 };
  63
  64 static const struct sec_voltage_desc buck_voltage_val2 = {
  65         .max = 1600000,
  66         .min =  600000,
  67         .step =   6250,
  68 };
  69
  70 static const struct sec_voltage_desc buck_voltage_val3 = {
  71         .max = 3000000,
  72         .min =  750000,
  73         .step =  12500,
  74 };
  75
  76 static const struct sec_voltage_desc ldo_voltage_val1 = {
  77         .max = 3950000,
  78         .min =  800000,
  79         .step =  50000,
  80 };
  81
  82 static const struct sec_voltage_desc ldo_voltage_val2 = {
  83         .max = 2375000,
  84         .min =  800000,
  85         .step =  25000,
  86 };
  87
  88 static const struct sec_voltage_desc *reg_voltage_map[] = {
  89         [S5M8767_LDO1] = &ldo_voltage_val2,
  90         [S5M8767_LDO2] = &ldo_voltage_val2,
  91         [S5M8767_LDO3] = &ldo_voltage_val1,
  92         [S5M8767_LDO4] = &ldo_voltage_val1,
  93         [S5M8767_LDO5] = &ldo_voltage_val1,
  94         [S5M8767_LDO6] = &ldo_voltage_val2,
  95         [S5M8767_LDO7] = &ldo_voltage_val2,
  96         [S5M8767_LDO8] = &ldo_voltage_val2,
  97         [S5M8767_LDO9] = &ldo_voltage_val1,
  98         [S5M8767_LDO10] = &ldo_voltage_val1,
  99         [S5M8767_LDO11] = &ldo_voltage_val1,
 100         [S5M8767_LDO12] = &ldo_voltage_val1,
 101         [S5M8767_LDO13] = &ldo_voltage_val1,
 102         [S5M8767_LDO14] = &ldo_voltage_val1,
 103         [S5M8767_LDO15] = &ldo_voltage_val2,
 104         [S5M8767_LDO16] = &ldo_voltage_val1,
 105         [S5M8767_LDO17] = &ldo_voltage_val1,
 106         [S5M8767_LDO18] = &ldo_voltage_val1,
 107         [S5M8767_LDO19] = &ldo_voltage_val1,
 108         [S5M8767_LDO20] = &ldo_voltage_val1,
 109         [S5M8767_LDO21] = &ldo_voltage_val1,
 110         [S5M8767_LDO22] = &ldo_voltage_val1,
 111         [S5M8767_LDO23] = &ldo_voltage_val1,
 112         [S5M8767_LDO24] = &ldo_voltage_val1,
 113         [S5M8767_LDO25] = &ldo_voltage_val1,
 114         [S5M8767_LDO26] = &ldo_voltage_val1,
 115         [S5M8767_LDO27] = &ldo_voltage_val1,
 116         [S5M8767_LDO28] = &ldo_voltage_val1,
 117         [S5M8767_BUCK1] = &buck_voltage_val1,
 118         [S5M8767_BUCK2] = &buck_voltage_val2,
 119         [S5M8767_BUCK3] = &buck_voltage_val2,
 120         [S5M8767_BUCK4] = &buck_voltage_val2,
 121         [S5M8767_BUCK5] = &buck_voltage_val1,
 122         [S5M8767_BUCK6] = &buck_voltage_val1,
 123         [S5M8767_BUCK7] = NULL,
 124         [S5M8767_BUCK8] = NULL,
 125         [S5M8767_BUCK9] = &buck_voltage_val3,
 126 };
 127
 128 static unsigned int s5m8767_opmode_reg[][4] = {
 129         /* {OFF, ON, LOWPOWER, SUSPEND} */
 130         /* LDO1 ... LDO28 */
 131         {0x0, 0x3, 0x2, 0x1}, /* LDO1 */
 132         {0x0, 0x3, 0x2, 0x1},
 133         {0x0, 0x3, 0x2, 0x1},
 134         {0x0, 0x0, 0x0, 0x0},
 135         {0x0, 0x3, 0x2, 0x1}, /* LDO5 */
 136         {0x0, 0x3, 0x2, 0x1},
 137         {0x0, 0x3, 0x2, 0x1},
 138         {0x0, 0x3, 0x2, 0x1},
 139         {0x0, 0x3, 0x2, 0x1},
 140         {0x0, 0x3, 0x2, 0x1}, /* LDO10 */
 141         {0x0, 0x3, 0x2, 0x1},
 142         {0x0, 0x3, 0x2, 0x1},
 143         {0x0, 0x3, 0x2, 0x1},
 144         {0x0, 0x3, 0x2, 0x1},
 145         {0x0, 0x3, 0x2, 0x1}, /* LDO15 */
 146         {0x0, 0x3, 0x2, 0x1},
 147         {0x0, 0x3, 0x2, 0x1},
 148         {0x0, 0x0, 0x0, 0x0},
 149         {0x0, 0x3, 0x2, 0x1},
 150         {0x0, 0x3, 0x2, 0x1}, /* LDO20 */
 151         {0x0, 0x3, 0x2, 0x1},
 152         {0x0, 0x3, 0x2, 0x1},
 153         {0x0, 0x0, 0x0, 0x0},
 154         {0x0, 0x3, 0x2, 0x1},
 155         {0x0, 0x3, 0x2, 0x1}, /* LDO25 */
 156         {0x0, 0x3, 0x2, 0x1},
 157         {0x0, 0x3, 0x2, 0x1},
 158         {0x0, 0x3, 0x2, 0x1}, /* LDO28 */
 159
 160         /* BUCK1 ... BUCK9 */
 161         {0x0, 0x3, 0x1, 0x1}, /* BUCK1 */
 162         {0x0, 0x3, 0x1, 0x1},
 163         {0x0, 0x3, 0x1, 0x1},
 164         {0x0, 0x3, 0x1, 0x1},
 165         {0x0, 0x3, 0x2, 0x1}, /* BUCK5 */
 166         {0x0, 0x3, 0x1, 0x1},
 167         {0x0, 0x3, 0x1, 0x1},
 168         {0x0, 0x3, 0x1, 0x1},
 169         {0x0, 0x3, 0x1, 0x1}, /* BUCK9 */
 170 };
 171
 172 static int s5m8767_get_register(struct regulator_dev *rdev, int *reg,
 173                                 int *enable_ctrl)
 174 {
 175         int i, reg_id = rdev_get_id(rdev);
 176         unsigned int mode;
 177         struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
 178
 179         switch (reg_id) {
 180         case S5M8767_LDO1 ... S5M8767_LDO2:
 181                 *reg = S5M8767_REG_LDO1CTRL + (reg_id - S5M8767_LDO1);
 182                 break;
 183         case S5M8767_LDO3 ... S5M8767_LDO28:
 184                 *reg = S5M8767_REG_LDO3CTRL + (reg_id - S5M8767_LDO3);
 185                 break;
 186         case S5M8767_BUCK1:
 187                 *reg = S5M8767_REG_BUCK1CTRL1;
 188                 break;
 189         case S5M8767_BUCK2 ... S5M8767_BUCK4:
 190                 *reg = S5M8767_REG_BUCK2CTRL + (reg_id - S5M8767_BUCK2) * 9;
 191                 break;
 192         case S5M8767_BUCK5:
 193                 *reg = S5M8767_REG_BUCK5CTRL1;
 194                 break;
 195         case S5M8767_BUCK6 ... S5M8767_BUCK9:
 196                 *reg = S5M8767_REG_BUCK6CTRL1 + (reg_id - S5M8767_BUCK6) * 2;
 197                 break;
 198         default:
 199                 return -EINVAL;
 200         }
 201
 202         for (i = 0; i < s5m8767->num_regulators; i++) {
 203                 if (s5m8767->opmode[i].id == reg_id) {
 204                         mode = s5m8767->opmode[i].mode;
 205                         break;
 206                 }
 207         }
 208
 209         if (i < s5m8767->num_regulators)
 210                 *enable_ctrl =
 211                 s5m8767_opmode_reg[reg_id][mode] << S5M8767_ENCTRL_SHIFT;
 212
 213         return 0;
 214 }
 215
 216 static int s5m8767_reg_is_enabled(struct regulator_dev *rdev)
 217 {
 218         struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
 219         int ret, reg;
 220         int mask = 0xc0, enable_ctrl;
 221         unsigned int val;
 222
 223         ret = s5m8767_get_register(rdev, &reg, &enable_ctrl);
 224         if (ret == -EINVAL)
 225                 return 1;
 226         else if (ret)
 227                 return ret;
 228
 229         ret = sec_reg_read(s5m8767->iodev, reg, &val);
 230         if (ret)
 231                 return ret;
 232
 233         return (val & mask) == enable_ctrl;
 234 }
 235
 236 static int s5m8767_reg_enable(struct regulator_dev *rdev)
 237 {
 238         struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
 239         int ret, reg;
 240         int mask = 0xc0, enable_ctrl;
 241
 242         ret = s5m8767_get_register(rdev, &reg, &enable_ctrl);
 243         if (ret)
 244                 return ret;
 245
 246         return sec_reg_update(s5m8767->iodev, reg, enable_ctrl, mask);
 247 }
 248
 249 static int s5m8767_reg_disable(struct regulator_dev *rdev)
 250 {
 251         struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
 252         int ret, reg;
 253         int  mask = 0xc0, enable_ctrl;
 254
 255         ret = s5m8767_get_register(rdev, &reg, &enable_ctrl);
 256         if (ret)
 257                 return ret;
 258
 259         return sec_reg_update(s5m8767->iodev, reg, ~mask, mask);
 260 }
 261
 262 static int s5m8767_get_vsel_reg(int reg_id, struct s5m8767_info *s5m8767)
 263 {
 264         int reg;
 265
 266         switch (reg_id) {
 267         case S5M8767_LDO1 ... S5M8767_LDO2:
 268                 reg = S5M8767_REG_LDO1CTRL + (reg_id - S5M8767_LDO1);
 269                 break;
 270         case S5M8767_LDO3 ... S5M8767_LDO28:
 271                 reg = S5M8767_REG_LDO3CTRL + (reg_id - S5M8767_LDO3);
 272                 break;
 273         case S5M8767_BUCK1:
 274                 reg = S5M8767_REG_BUCK1CTRL2;
 275                 break;
 276         case S5M8767_BUCK2:
 277                 reg = S5M8767_REG_BUCK2DVS1;
 278                 if (s5m8767->buck2_gpiodvs)
 279                         reg += s5m8767->buck_gpioindex;
 280                 break;
 281         case S5M8767_BUCK3:
 282                 reg = S5M8767_REG_BUCK3DVS1;
 283                 if (s5m8767->buck3_gpiodvs)
 284                         reg += s5m8767->buck_gpioindex;
 285                 break;
 286         case S5M8767_BUCK4:
 287                 reg = S5M8767_REG_BUCK4DVS1;
 288                 if (s5m8767->buck4_gpiodvs)
 289                         reg += s5m8767->buck_gpioindex;
 290                 break;
 291         case S5M8767_BUCK5:
 292                 reg = S5M8767_REG_BUCK5CTRL2;
 293                 break;
 294         case S5M8767_BUCK6 ... S5M8767_BUCK9:
 295                 reg = S5M8767_REG_BUCK6CTRL2 + (reg_id - S5M8767_BUCK6) * 2;
 296                 break;
 297         default:
 298                 return -EINVAL;
 299         }
 300
 301         return reg;
 302 }
 303
 304 static int s5m8767_convert_voltage_to_sel(const struct sec_voltage_desc *desc,
 305                                           int min_vol)
 306 {
 307         int selector = 0;
 308
 309         if (desc == NULL)
 310                 return -EINVAL;
 311
 312         if (min_vol > desc->max)
 313                 return -EINVAL;
 314
 315         if (min_vol < desc->min)
 316                 min_vol = desc->min;
 317
 318         selector = DIV_ROUND_UP(min_vol - desc->min, desc->step);
 319
 320         if (desc->min + desc->step * selector > desc->max)
 321                 return -EINVAL;
 322
 323         return selector;
 324 }
 325
 326 static inline int s5m8767_set_high(struct s5m8767_info *s5m8767)
 327 {
 328         int temp_index = s5m8767->buck_gpioindex;
 329
 330         gpio_set_value(s5m8767->buck_gpios[0], (temp_index >> 2) & 0x1);
 331         gpio_set_value(s5m8767->buck_gpios[1], (temp_index >> 1) & 0x1);
 332         gpio_set_value(s5m8767->buck_gpios[2], temp_index & 0x1);
 333
 334         return 0;
 335 }
 336
 337 static inline int s5m8767_set_low(struct s5m8767_info *s5m8767)
 338 {
 339         int temp_index = s5m8767->buck_gpioindex;
 340
 341         gpio_set_value(s5m8767->buck_gpios[2], temp_index & 0x1);
 342         gpio_set_value(s5m8767->buck_gpios[1], (temp_index >> 1) & 0x1);
 343         gpio_set_value(s5m8767->buck_gpios[0], (temp_index >> 2) & 0x1);
 344
 345         return 0;
 346 }
 347
 348 static int s5m8767_set_voltage_sel(struct regulator_dev *rdev,
 349                                    unsigned selector)
 350 {
 351         struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
 352         int reg_id = rdev_get_id(rdev);
 353         int old_index, index = 0;
 354         u8 *buck234_vol = NULL;
 355
 356         switch (reg_id) {
 357         case S5M8767_LDO1 ... S5M8767_LDO28:
 358                 break;
 359         case S5M8767_BUCK1 ... S5M8767_BUCK6:
 360                 if (reg_id == S5M8767_BUCK2 && s5m8767->buck2_gpiodvs)
 361                         buck234_vol = &s5m8767->buck2_vol[0];
 362                 else if (reg_id == S5M8767_BUCK3 && s5m8767->buck3_gpiodvs)
 363                         buck234_vol = &s5m8767->buck3_vol[0];
 364                 else if (reg_id == S5M8767_BUCK4 && s5m8767->buck4_gpiodvs)
 365                         buck234_vol = &s5m8767->buck4_vol[0];
 366                 break;
 367         case S5M8767_BUCK7 ... S5M8767_BUCK8:
 368                 return -EINVAL;
 369         case S5M8767_BUCK9:
 370                 break;
 371         default:
 372                 return -EINVAL;
 373         }
 374
 375         /* buck234_vol != NULL means to control buck234 voltage via DVS GPIO */
 376         if (buck234_vol) {
 377                 while (*buck234_vol != selector) {
 378                         buck234_vol++;
 379                         index++;
 380                 }
 381                 old_index = s5m8767->buck_gpioindex;
 382                 s5m8767->buck_gpioindex = index;
 383
 384                 if (index > old_index)
 385                         return s5m8767_set_high(s5m8767);
 386                 else
 387                         return s5m8767_set_low(s5m8767);
 388         } else {
 389                 return regulator_set_voltage_sel_regmap(rdev, selector);
 390         }
 391 }
 392
 393 static int s5m8767_set_voltage_time_sel(struct regulator_dev *rdev,
 394                                              unsigned int old_sel,
 395                                              unsigned int new_sel)
 396 {
 397         struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
 398         const struct sec_voltage_desc *desc;
 399         int reg_id = rdev_get_id(rdev);
 400
 401         desc = reg_voltage_map[reg_id];
 402
 403         if ((old_sel < new_sel) && s5m8767->ramp_delay)
 404                 return DIV_ROUND_UP(desc->step * (new_sel - old_sel),
 405                                         s5m8767->ramp_delay * 1000);
 406         return 0;
 407 }
 408
 409 static struct regulator_ops s5m8767_ops = {
 410         .list_voltage           = regulator_list_voltage_linear,
 411         .is_enabled             = s5m8767_reg_is_enabled,
 412         .enable                 = s5m8767_reg_enable,
 413         .disable                = s5m8767_reg_disable,
 414         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 415         .set_voltage_sel        = s5m8767_set_voltage_sel,
 416         .set_voltage_time_sel   = s5m8767_set_voltage_time_sel,
 417 };
 418
 419 static struct regulator_ops s5m8767_buck78_ops = {
 420         .is_enabled             = s5m8767_reg_is_enabled,
 421         .enable                 = s5m8767_reg_enable,
 422         .disable                = s5m8767_reg_disable,
 423 };
 424
 425 #define s5m8767_regulator_desc(_name) {         \
 426         .name           = #_name,               \
 427         .id             = S5M8767_##_name,      \
 428         .ops            = &s5m8767_ops,         \
 429         .type           = REGULATOR_VOLTAGE,    \
 430         .owner          = THIS_MODULE,          \
 431 }
 432
 433 #define s5m8767_regulator_buck78_desc(_name) {  \
 434         .name           = #_name,               \
 435         .id             = S5M8767_##_name,      \
 436         .ops            = &s5m8767_buck78_ops,  \
 437         .type           = REGULATOR_VOLTAGE,    \
 438         .owner          = THIS_MODULE,          \
 439 }
 440
 441 static struct regulator_desc regulators[] = {
 442         s5m8767_regulator_desc(LDO1),
 443         s5m8767_regulator_desc(LDO2),
 444         s5m8767_regulator_desc(LDO3),
 445         s5m8767_regulator_desc(LDO4),
 446         s5m8767_regulator_desc(LDO5),
 447         s5m8767_regulator_desc(LDO6),
 448         s5m8767_regulator_desc(LDO7),
 449         s5m8767_regulator_desc(LDO8),
 450         s5m8767_regulator_desc(LDO9),
 451         s5m8767_regulator_desc(LDO10),
 452         s5m8767_regulator_desc(LDO11),
 453         s5m8767_regulator_desc(LDO12),
 454         s5m8767_regulator_desc(LDO13),
 455         s5m8767_regulator_desc(LDO14),
 456         s5m8767_regulator_desc(LDO15),
 457         s5m8767_regulator_desc(LDO16),
 458         s5m8767_regulator_desc(LDO17),
 459         s5m8767_regulator_desc(LDO18),
 460         s5m8767_regulator_desc(LDO19),
 461         s5m8767_regulator_desc(LDO20),
 462         s5m8767_regulator_desc(LDO21),
 463         s5m8767_regulator_desc(LDO22),
 464         s5m8767_regulator_desc(LDO23),
 465         s5m8767_regulator_desc(LDO24),
 466         s5m8767_regulator_desc(LDO25),
 467         s5m8767_regulator_desc(LDO26),
 468         s5m8767_regulator_desc(LDO27),
 469         s5m8767_regulator_desc(LDO28),
 470         s5m8767_regulator_desc(BUCK1),
 471         s5m8767_regulator_desc(BUCK2),
 472         s5m8767_regulator_desc(BUCK3),
 473         s5m8767_regulator_desc(BUCK4),
 474         s5m8767_regulator_desc(BUCK5),
 475         s5m8767_regulator_desc(BUCK6),
 476         s5m8767_regulator_buck78_desc(BUCK7),
 477         s5m8767_regulator_buck78_desc(BUCK8),
 478         s5m8767_regulator_desc(BUCK9),
 479 };
 480
 481 #ifdef CONFIG_OF
 482 static int s5m8767_pmic_dt_parse_dvs_gpio(struct sec_pmic_dev *iodev,
 483                         struct sec_platform_data *pdata,
 484                         struct device_node *pmic_np)
 485 {
 486         int i, gpio;
 487
 488         for (i = 0; i < 3; i++) {
 489                 gpio = of_get_named_gpio(pmic_np,
 490                                         "s5m8767,pmic-buck-dvs-gpios", i);
 491                 if (!gpio_is_valid(gpio)) {
 492                         dev_err(iodev->dev, "invalid gpio[%d]: %d\n", i, gpio);
 493                         return -EINVAL;
 494                 }
 495                 pdata->buck_gpios[i] = gpio;
 496         }
 497         return 0;
 498 }
 499
 500 static int s5m8767_pmic_dt_parse_ds_gpio(struct sec_pmic_dev *iodev,
 501                         struct sec_platform_data *pdata,
 502                         struct device_node *pmic_np)
 503 {
 504         int i, gpio;
 505
 506         for (i = 0; i < 3; i++) {
 507                 gpio = of_get_named_gpio(pmic_np,
 508                                         "s5m8767,pmic-buck-ds-gpios", i);
 509                 if (!gpio_is_valid(gpio)) {
 510                         dev_err(iodev->dev, "invalid gpio[%d]: %d\n", i, gpio);
 511                         return -EINVAL;
 512                 }
 513                 pdata->buck_ds[i] = gpio;
 514         }
 515         return 0;
 516 }
 517
 518 static int s5m8767_pmic_dt_parse_pdata(struct platform_device *pdev,
 519                                         struct sec_platform_data *pdata)
 520 {
 521         struct sec_pmic_dev *iodev = dev_get_drvdata(pdev->dev.parent);
 522         struct device_node *pmic_np, *regulators_np, *reg_np;
 523         struct sec_regulator_data *rdata;
 524         struct sec_opmode_data *rmode;
 525         unsigned int i, dvs_voltage_nr = 1, ret;
 526
 527         pmic_np = iodev->dev->of_node;
 528         if (!pmic_np) {
 529                 dev_err(iodev->dev, "could not find pmic sub-node\n");
 530                 return -ENODEV;
 531         }
 532
 533         regulators_np = of_find_node_by_name(pmic_np, "regulators");
 534         if (!regulators_np) {
 535                 dev_err(iodev->dev, "could not find regulators sub-node\n");
 536                 return -EINVAL;
 537         }
 538
 539         /* count the number of regulators to be supported in pmic */
 540         pdata->num_regulators = of_get_child_count(regulators_np);
 541
 542         rdata = devm_kzalloc(&pdev->dev, sizeof(*rdata) *
 543                                 pdata->num_regulators, GFP_KERNEL);
 544         if (!rdata) {
 545                 dev_err(iodev->dev,
 546                         "could not allocate memory for regulator data\n");
 547                 return -ENOMEM;
 548         }
 549
 550         rmode = devm_kzalloc(&pdev->dev, sizeof(*rmode) *
 551                                 pdata->num_regulators, GFP_KERNEL);
 552         if (!rmode) {
 553                 dev_err(iodev->dev,
 554                         "could not allocate memory for regulator mode\n");
 555                 return -ENOMEM;
 556         }
 557
 558         pdata->regulators = rdata;
 559         pdata->opmode = rmode;
 560         for_each_child_of_node(regulators_np, reg_np) {
 561                 for (i = 0; i < ARRAY_SIZE(regulators); i++)
 562                         if (!of_node_cmp(reg_np->name, regulators[i].name))
 563                                 break;
 564
 565                 if (i == ARRAY_SIZE(regulators)) {
 566                         dev_warn(iodev->dev,
 567                         "don't know how to configure regulator %s\n",
 568                         reg_np->name);
 569                         continue;
 570                 }
 571
 572                 rdata->id = i;
 573                 rdata->initdata = of_get_regulator_init_data(
 574                                                 &pdev->dev, reg_np);
 575                 rdata->reg_node = reg_np;
 576                 rdata++;
 577                 rmode->id = i;
 578                 if (of_property_read_u32(reg_np, "op_mode",
 579                                 &rmode->mode)) {
 580                         dev_warn(iodev->dev,
 581                                 "no op_mode property property at %s\n",
 582                                 reg_np->full_name);
 583
 584                         rmode->mode = S5M8767_OPMODE_NORMAL_MODE;
 585                 }
 586                 rmode++;
 587         }
 588
 589         if (of_get_property(pmic_np, "s5m8767,pmic-buck2-uses-gpio-dvs", NULL))
 590                 pdata->buck2_gpiodvs = true;
 591
 592         if (of_get_property(pmic_np, "s5m8767,pmic-buck3-uses-gpio-dvs", NULL))
 593                 pdata->buck3_gpiodvs = true;
 594
 595         if (of_get_property(pmic_np, "s5m8767,pmic-buck4-uses-gpio-dvs", NULL))
 596                 pdata->buck4_gpiodvs = true;
 597
 598         if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs ||
 599                                                 pdata->buck4_gpiodvs) {
 600                 ret = s5m8767_pmic_dt_parse_dvs_gpio(iodev, pdata, pmic_np);
 601                 if (ret)
 602                         return -EINVAL;
 603
 604                 if (of_property_read_u32(pmic_np,
 605                                 "s5m8767,pmic-buck-default-dvs-idx",
 606                                 &pdata->buck_default_idx)) {
 607                         pdata->buck_default_idx = 0;
 608                 } else {
 609                         if (pdata->buck_default_idx >= 8) {
 610                                 pdata->buck_default_idx = 0;
 611                                 dev_info(iodev->dev,
 612                                 "invalid value for default dvs index, use 0\n");
 613                         }
 614                 }
 615                 dvs_voltage_nr = 8;
 616         }
 617
 618         ret = s5m8767_pmic_dt_parse_ds_gpio(iodev, pdata, pmic_np);
 619         if (ret)
 620                 return -EINVAL;
 621
 622         if (of_property_read_u32_array(pmic_np,
 623                                 "s5m8767,pmic-buck2-dvs-voltage",
 624                                 pdata->buck2_voltage, dvs_voltage_nr)) {
 625                 dev_err(iodev->dev, "buck2 voltages not specified\n");
 626                 return -EINVAL;
 627         }
 628
 629         if (of_property_read_u32_array(pmic_np,
 630                                 "s5m8767,pmic-buck3-dvs-voltage",
 631                                 pdata->buck3_voltage, dvs_voltage_nr)) {
 632                 dev_err(iodev->dev, "buck3 voltages not specified\n");
 633                 return -EINVAL;
 634         }
 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         return 0;
 644 }
 645 #else
 646 static int s5m8767_pmic_dt_parse_pdata(struct platform_device *pdev,
 647                                         struct sec_platform_data *pdata)
 648 {
 649         return 0;
 650 }
 651 #endif /* CONFIG_OF */
 652
 653 static int s5m8767_pmic_probe(struct platform_device *pdev)
 654 {
 655         struct sec_pmic_dev *iodev = dev_get_drvdata(pdev->dev.parent);
 656         struct sec_platform_data *pdata = iodev->pdata;
 657         struct regulator_config config = { };
 658         struct regulator_dev **rdev;
 659         struct s5m8767_info *s5m8767;
 660         int i, ret, size, buck_init;
 661
 662         if (!pdata) {
 663                 dev_err(pdev->dev.parent, "Platform data not supplied\n");
 664                 return -ENODEV;
 665         }
 666
 667         if (iodev->dev->of_node) {
 668                 ret = s5m8767_pmic_dt_parse_pdata(pdev, pdata);
 669                 if (ret)
 670                         return ret;
 671         }
 672
 673         if (pdata->buck2_gpiodvs) {
 674                 if (pdata->buck3_gpiodvs || pdata->buck4_gpiodvs) {
 675                         dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n");
 676                         return -EINVAL;
 677                 }
 678         }
 679
 680         if (pdata->buck3_gpiodvs) {
 681                 if (pdata->buck2_gpiodvs || pdata->buck4_gpiodvs) {
 682                         dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n");
 683                         return -EINVAL;
 684                 }
 685         }
 686
 687         if (pdata->buck4_gpiodvs) {
 688                 if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs) {
 689                         dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n");
 690                         return -EINVAL;
 691                 }
 692         }
 693
 694         s5m8767 = devm_kzalloc(&pdev->dev, sizeof(struct s5m8767_info),
 695                                 GFP_KERNEL);
 696         if (!s5m8767)
 697                 return -ENOMEM;
 698
 699         size = sizeof(struct regulator_dev *) * (S5M8767_REG_MAX - 2);
 700         s5m8767->rdev = devm_kzalloc(&pdev->dev, size, GFP_KERNEL);
 701         if (!s5m8767->rdev)
 702                 return -ENOMEM;
 703
 704         rdev = s5m8767->rdev;
 705         s5m8767->dev = &pdev->dev;
 706         s5m8767->iodev = iodev;
 707         s5m8767->num_regulators = pdata->num_regulators;
 708         platform_set_drvdata(pdev, s5m8767);
 709
 710         s5m8767->buck_gpioindex = pdata->buck_default_idx;
 711         s5m8767->buck2_gpiodvs = pdata->buck2_gpiodvs;
 712         s5m8767->buck3_gpiodvs = pdata->buck3_gpiodvs;
 713         s5m8767->buck4_gpiodvs = pdata->buck4_gpiodvs;
 714         s5m8767->buck_gpios[0] = pdata->buck_gpios[0];
 715         s5m8767->buck_gpios[1] = pdata->buck_gpios[1];
 716         s5m8767->buck_gpios[2] = pdata->buck_gpios[2];
 717         s5m8767->buck_ds[0] = pdata->buck_ds[0];
 718         s5m8767->buck_ds[1] = pdata->buck_ds[1];
 719         s5m8767->buck_ds[2] = pdata->buck_ds[2];
 720
 721         s5m8767->ramp_delay = pdata->buck_ramp_delay;
 722         s5m8767->buck2_ramp = pdata->buck2_ramp_enable;
 723         s5m8767->buck3_ramp = pdata->buck3_ramp_enable;
 724         s5m8767->buck4_ramp = pdata->buck4_ramp_enable;
 725         s5m8767->opmode = pdata->opmode;
 726
 727         buck_init = s5m8767_convert_voltage_to_sel(&buck_voltage_val2,
 728                                                    pdata->buck2_init);
 729
 730         sec_reg_write(s5m8767->iodev, S5M8767_REG_BUCK2DVS2, buck_init);
 731
 732         buck_init = s5m8767_convert_voltage_to_sel(&buck_voltage_val2,
 733                                                    pdata->buck3_init);
 734
 735         sec_reg_write(s5m8767->iodev, S5M8767_REG_BUCK3DVS2, buck_init);
 736
 737         buck_init = s5m8767_convert_voltage_to_sel(&buck_voltage_val2,
 738                                                    pdata->buck4_init);
 739
 740         sec_reg_write(s5m8767->iodev, S5M8767_REG_BUCK4DVS2, buck_init);
 741
 742         for (i = 0; i < 8; i++) {
 743                 if (s5m8767->buck2_gpiodvs) {
 744                         s5m8767->buck2_vol[i] =
 745                                 s5m8767_convert_voltage_to_sel(
 746                                                 &buck_voltage_val2,
 747                                                 pdata->buck2_voltage[i]);
 748                 }
 749
 750                 if (s5m8767->buck3_gpiodvs) {
 751                         s5m8767->buck3_vol[i] =
 752                                 s5m8767_convert_voltage_to_sel(
 753                                                 &buck_voltage_val2,
 754                                                 pdata->buck3_voltage[i]);
 755                 }
 756
 757                 if (s5m8767->buck4_gpiodvs) {
 758                         s5m8767->buck4_vol[i] =
 759                                 s5m8767_convert_voltage_to_sel(
 760                                                 &buck_voltage_val2,
 761                                                 pdata->buck4_voltage[i]);
 762                 }
 763         }
 764
 765         if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs ||
 766                                                 pdata->buck4_gpiodvs) {
 767
 768                 if (!gpio_is_valid(pdata->buck_gpios[0]) ||
 769                         !gpio_is_valid(pdata->buck_gpios[1]) ||
 770                         !gpio_is_valid(pdata->buck_gpios[2])) {
 771                         dev_err(&pdev->dev, "GPIO NOT VALID\n");
 772                         return -EINVAL;
 773                 }
 774
 775                 ret = devm_gpio_request(&pdev->dev, pdata->buck_gpios[0],
 776                                         "S5M8767 SET1");
 777                 if (ret)
 778                         return ret;
 779
 780                 ret = devm_gpio_request(&pdev->dev, pdata->buck_gpios[1],
 781                                         "S5M8767 SET2");
 782                 if (ret)
 783                         return ret;
 784
 785                 ret = devm_gpio_request(&pdev->dev, pdata->buck_gpios[2],
 786                                         "S5M8767 SET3");
 787                 if (ret)
 788                         return ret;
 789
 790                 /* SET1 GPIO */
 791                 gpio_direction_output(pdata->buck_gpios[0],
 792                                 (s5m8767->buck_gpioindex >> 2) & 0x1);
 793                 /* SET2 GPIO */
 794                 gpio_direction_output(pdata->buck_gpios[1],
 795                                 (s5m8767->buck_gpioindex >> 1) & 0x1);
 796                 /* SET3 GPIO */
 797                 gpio_direction_output(pdata->buck_gpios[2],
 798                                 (s5m8767->buck_gpioindex >> 0) & 0x1);
 799         }
 800
 801         ret = devm_gpio_request(&pdev->dev, pdata->buck_ds[0], "S5M8767 DS2");
 802         if (ret)
 803                 return ret;
 804
 805         ret = devm_gpio_request(&pdev->dev, pdata->buck_ds[1], "S5M8767 DS3");
 806         if (ret)
 807                 return ret;
 808
 809         ret = devm_gpio_request(&pdev->dev, pdata->buck_ds[2], "S5M8767 DS4");
 810         if (ret)
 811                 return ret;
 812
 813         /* DS2 GPIO */
 814         gpio_direction_output(pdata->buck_ds[0], 0x0);
 815         /* DS3 GPIO */
 816         gpio_direction_output(pdata->buck_ds[1], 0x0);
 817         /* DS4 GPIO */
 818         gpio_direction_output(pdata->buck_ds[2], 0x0);
 819
 820         if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs ||
 821            pdata->buck4_gpiodvs) {
 822                 sec_reg_update(s5m8767->iodev, S5M8767_REG_BUCK2CTRL,
 823                                 (pdata->buck2_gpiodvs) ? (1 << 1) : (0 << 1),
 824                                 1 << 1);
 825                 sec_reg_update(s5m8767->iodev, S5M8767_REG_BUCK3CTRL,
 826                                 (pdata->buck3_gpiodvs) ? (1 << 1) : (0 << 1),
 827                                 1 << 1);
 828                 sec_reg_update(s5m8767->iodev, S5M8767_REG_BUCK4CTRL,
 829                                 (pdata->buck4_gpiodvs) ? (1 << 1) : (0 << 1),
 830                                 1 << 1);
 831         }
 832
 833         /* Initialize GPIO DVS registers */
 834         for (i = 0; i < 8; i++) {
 835                 if (s5m8767->buck2_gpiodvs) {
 836                         sec_reg_write(s5m8767->iodev, S5M8767_REG_BUCK2DVS1 + i,
 837                                            s5m8767->buck2_vol[i]);
 838                 }
 839
 840                 if (s5m8767->buck3_gpiodvs) {
 841                         sec_reg_write(s5m8767->iodev, S5M8767_REG_BUCK3DVS1 + i,
 842                                            s5m8767->buck3_vol[i]);
 843                 }
 844
 845                 if (s5m8767->buck4_gpiodvs) {
 846                         sec_reg_write(s5m8767->iodev, S5M8767_REG_BUCK4DVS1 + i,
 847                                            s5m8767->buck4_vol[i]);
 848                 }
 849         }
 850
 851         if (s5m8767->buck2_ramp)
 852                 sec_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP, 0x08, 0x08);
 853
 854         if (s5m8767->buck3_ramp)
 855                 sec_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP, 0x04, 0x04);
 856
 857         if (s5m8767->buck4_ramp)
 858                 sec_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP, 0x02, 0x02);
 859
 860         if (s5m8767->buck2_ramp || s5m8767->buck3_ramp
 861                 || s5m8767->buck4_ramp) {
 862                 switch (s5m8767->ramp_delay) {
 863                 case 5:
 864                         sec_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP,
 865                                         0x40, 0xf0);
 866                         break;
 867                 case 10:
 868                         sec_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP,
 869                                         0x90, 0xf0);
 870                         break;
 871                 case 25:
 872                         sec_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP,
 873                                         0xd0, 0xf0);
 874                         break;
 875                 case 50:
 876                         sec_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP,
 877                                         0xe0, 0xf0);
 878                         break;
 879                 case 100:
 880                         sec_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP,
 881                                         0xf0, 0xf0);
 882                         break;
 883                 default:
 884                         sec_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP,
 885                                         0x90, 0xf0);
 886                 }
 887         }
 888
 889         for (i = 0; i < pdata->num_regulators; i++) {
 890                 const struct sec_voltage_desc *desc;
 891                 int id = pdata->regulators[i].id;
 892
 893                 desc = reg_voltage_map[id];
 894                 if (desc) {
 895                         regulators[id].n_voltages =
 896                                 (desc->max - desc->min) / desc->step + 1;
 897                         regulators[id].min_uV = desc->min;
 898                         regulators[id].uV_step = desc->step;
 899                         regulators[id].vsel_reg =
 900                                 s5m8767_get_vsel_reg(id, s5m8767);
 901                         if (id < S5M8767_BUCK1)
 902                                 regulators[id].vsel_mask = 0x3f;
 903                         else
 904                                 regulators[id].vsel_mask = 0xff;
 905                 }
 906
 907                 config.dev = s5m8767->dev;
 908                 config.init_data = pdata->regulators[i].initdata;
 909                 config.driver_data = s5m8767;
 910                 config.regmap = iodev->regmap;
 911                 config.of_node = pdata->regulators[i].reg_node;
 912
 913                 rdev[i] = devm_regulator_register(&pdev->dev, &regulators[id],
 914                                                   &config);
 915                 if (IS_ERR(rdev[i])) {
 916                         ret = PTR_ERR(rdev[i]);
 917                         dev_err(s5m8767->dev, "regulator init failed for %d\n",
 918                                         id);
 919                         return ret;
 920                 }
 921         }
 922
 923         return 0;
 924 }
 925
 926 static const struct platform_device_id s5m8767_pmic_id[] = {
 927         { "s5m8767-pmic", 0},
 928         { },
 929 };
 930 MODULE_DEVICE_TABLE(platform, s5m8767_pmic_id);
 931
 932 static struct platform_driver s5m8767_pmic_driver = {
 933         .driver = {
 934                 .name = "s5m8767-pmic",
 935                 .owner = THIS_MODULE,
 936         },
 937         .probe = s5m8767_pmic_probe,
 938         .id_table = s5m8767_pmic_id,
 939 };
 940
 941 static int __init s5m8767_pmic_init(void)
 942 {
 943         return platform_driver_register(&s5m8767_pmic_driver);
 944 }
 945 subsys_initcall(s5m8767_pmic_init);
 946
 947 static void __exit s5m8767_pmic_exit(void)
 948 {
 949         platform_driver_unregister(&s5m8767_pmic_driver);
 950 }
 951 module_exit(s5m8767_pmic_exit);
 952
 953 /* Module information */
 954 MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
 955 MODULE_DESCRIPTION("SAMSUNG S5M8767 Regulator Driver");
 956 MODULE_LICENSE("GPL");