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 regulator_dev **rdev;
  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                 *enable_ctrl =
 208                 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 void s5m8767_pmic_dt_parse_ext_control_gpio(struct sec_pmic_dev *iodev,
 533                 struct sec_regulator_data *rdata,
 534                 struct device_node *reg_np)
 535 {
 536         rdata->ext_control_gpio = of_get_named_gpio(reg_np,
 537                         "s5m8767,pmic-ext-control-gpios", 0);
 538         if (!gpio_is_valid(rdata->ext_control_gpio))
 539                 rdata->ext_control_gpio = 0;
 540 }
 541
 542 static int s5m8767_pmic_dt_parse_pdata(struct platform_device *pdev,
 543                                         struct sec_platform_data *pdata)
 544 {
 545         struct sec_pmic_dev *iodev = dev_get_drvdata(pdev->dev.parent);
 546         struct device_node *pmic_np, *regulators_np, *reg_np;
 547         struct sec_regulator_data *rdata;
 548         struct sec_opmode_data *rmode;
 549         unsigned int i, dvs_voltage_nr = 8, ret;
 550
 551         pmic_np = iodev->dev->of_node;
 552         if (!pmic_np) {
 553                 dev_err(iodev->dev, "could not find pmic sub-node\n");
 554                 return -ENODEV;
 555         }
 556
 557         regulators_np = of_get_child_by_name(pmic_np, "regulators");
 558         if (!regulators_np) {
 559                 dev_err(iodev->dev, "could not find regulators sub-node\n");
 560                 return -EINVAL;
 561         }
 562
 563         /* count the number of regulators to be supported in pmic */
 564         pdata->num_regulators = of_get_child_count(regulators_np);
 565
 566         rdata = devm_kzalloc(&pdev->dev, sizeof(*rdata) *
 567                                 pdata->num_regulators, GFP_KERNEL);
 568         if (!rdata)
 569                 return -ENOMEM;
 570
 571         rmode = devm_kzalloc(&pdev->dev, sizeof(*rmode) *
 572                                 pdata->num_regulators, GFP_KERNEL);
 573         if (!rmode)
 574                 return -ENOMEM;
 575
 576         pdata->regulators = rdata;
 577         pdata->opmode = rmode;
 578         for_each_child_of_node(regulators_np, reg_np) {
 579                 for (i = 0; i < ARRAY_SIZE(regulators); i++)
 580                         if (!of_node_cmp(reg_np->name, regulators[i].name))
 581                                 break;
 582
 583                 if (i == ARRAY_SIZE(regulators)) {
 584                         dev_warn(iodev->dev,
 585                         "don't know how to configure regulator %s\n",
 586                         reg_np->name);
 587                         continue;
 588                 }
 589
 590                 s5m8767_pmic_dt_parse_ext_control_gpio(iodev, rdata, reg_np);
 591
 592                 rdata->id = i;
 593                 rdata->initdata = of_get_regulator_init_data(
 594                                                 &pdev->dev, reg_np);
 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 %s\n",
 602                                 reg_np->full_name);
 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 regulator_dev **rdev;
 699         struct s5m8767_info *s5m8767;
 700         int i, ret, size, buck_init;
 701
 702         if (!pdata) {
 703                 dev_err(pdev->dev.parent, "Platform data not supplied\n");
 704                 return -ENODEV;
 705         }
 706
 707         if (iodev->dev->of_node) {
 708                 ret = s5m8767_pmic_dt_parse_pdata(pdev, pdata);
 709                 if (ret)
 710                         return ret;
 711         }
 712
 713         if (pdata->buck2_gpiodvs) {
 714                 if (pdata->buck3_gpiodvs || pdata->buck4_gpiodvs) {
 715                         dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n");
 716                         return -EINVAL;
 717                 }
 718         }
 719
 720         if (pdata->buck3_gpiodvs) {
 721                 if (pdata->buck2_gpiodvs || pdata->buck4_gpiodvs) {
 722                         dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n");
 723                         return -EINVAL;
 724                 }
 725         }
 726
 727         if (pdata->buck4_gpiodvs) {
 728                 if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs) {
 729                         dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n");
 730                         return -EINVAL;
 731                 }
 732         }
 733
 734         s5m8767 = devm_kzalloc(&pdev->dev, sizeof(struct s5m8767_info),
 735                                 GFP_KERNEL);
 736         if (!s5m8767)
 737                 return -ENOMEM;
 738
 739         size = sizeof(struct regulator_dev *) * (S5M8767_REG_MAX - 2);
 740         s5m8767->rdev = devm_kzalloc(&pdev->dev, size, GFP_KERNEL);
 741         if (!s5m8767->rdev)
 742                 return -ENOMEM;
 743
 744         rdev = s5m8767->rdev;
 745         s5m8767->dev = &pdev->dev;
 746         s5m8767->iodev = iodev;
 747         s5m8767->num_regulators = pdata->num_regulators;
 748         platform_set_drvdata(pdev, s5m8767);
 749
 750         s5m8767->buck_gpioindex = pdata->buck_default_idx;
 751         s5m8767->buck2_gpiodvs = pdata->buck2_gpiodvs;
 752         s5m8767->buck3_gpiodvs = pdata->buck3_gpiodvs;
 753         s5m8767->buck4_gpiodvs = pdata->buck4_gpiodvs;
 754         s5m8767->buck_gpios[0] = pdata->buck_gpios[0];
 755         s5m8767->buck_gpios[1] = pdata->buck_gpios[1];
 756         s5m8767->buck_gpios[2] = pdata->buck_gpios[2];
 757         s5m8767->buck_ds[0] = pdata->buck_ds[0];
 758         s5m8767->buck_ds[1] = pdata->buck_ds[1];
 759         s5m8767->buck_ds[2] = pdata->buck_ds[2];
 760
 761         s5m8767->ramp_delay = pdata->buck_ramp_delay;
 762         s5m8767->buck2_ramp = pdata->buck2_ramp_enable;
 763         s5m8767->buck3_ramp = pdata->buck3_ramp_enable;
 764         s5m8767->buck4_ramp = pdata->buck4_ramp_enable;
 765         s5m8767->opmode = pdata->opmode;
 766
 767         buck_init = s5m8767_convert_voltage_to_sel(&buck_voltage_val2,
 768                                                    pdata->buck2_init);
 769
 770         regmap_write(s5m8767->iodev->regmap_pmic, S5M8767_REG_BUCK2DVS2,
 771                         buck_init);
 772
 773         buck_init = s5m8767_convert_voltage_to_sel(&buck_voltage_val2,
 774                                                    pdata->buck3_init);
 775
 776         regmap_write(s5m8767->iodev->regmap_pmic, S5M8767_REG_BUCK3DVS2,
 777                         buck_init);
 778
 779         buck_init = s5m8767_convert_voltage_to_sel(&buck_voltage_val2,
 780                                                    pdata->buck4_init);
 781
 782         regmap_write(s5m8767->iodev->regmap_pmic, S5M8767_REG_BUCK4DVS2,
 783                         buck_init);
 784
 785         for (i = 0; i < 8; i++) {
 786                 if (s5m8767->buck2_gpiodvs) {
 787                         s5m8767->buck2_vol[i] =
 788                                 s5m8767_convert_voltage_to_sel(
 789                                                 &buck_voltage_val2,
 790                                                 pdata->buck2_voltage[i]);
 791                 }
 792
 793                 if (s5m8767->buck3_gpiodvs) {
 794                         s5m8767->buck3_vol[i] =
 795                                 s5m8767_convert_voltage_to_sel(
 796                                                 &buck_voltage_val2,
 797                                                 pdata->buck3_voltage[i]);
 798                 }
 799
 800                 if (s5m8767->buck4_gpiodvs) {
 801                         s5m8767->buck4_vol[i] =
 802                                 s5m8767_convert_voltage_to_sel(
 803                                                 &buck_voltage_val2,
 804                                                 pdata->buck4_voltage[i]);
 805                 }
 806         }
 807
 808         if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs ||
 809                                                 pdata->buck4_gpiodvs) {
 810
 811                 if (!gpio_is_valid(pdata->buck_gpios[0]) ||
 812                         !gpio_is_valid(pdata->buck_gpios[1]) ||
 813                         !gpio_is_valid(pdata->buck_gpios[2])) {
 814                         dev_err(&pdev->dev, "GPIO NOT VALID\n");
 815                         return -EINVAL;
 816                 }
 817
 818                 ret = devm_gpio_request(&pdev->dev, pdata->buck_gpios[0],
 819                                         "S5M8767 SET1");
 820                 if (ret)
 821                         return ret;
 822
 823                 ret = devm_gpio_request(&pdev->dev, pdata->buck_gpios[1],
 824                                         "S5M8767 SET2");
 825                 if (ret)
 826                         return ret;
 827
 828                 ret = devm_gpio_request(&pdev->dev, pdata->buck_gpios[2],
 829                                         "S5M8767 SET3");
 830                 if (ret)
 831                         return ret;
 832
 833                 /* SET1 GPIO */
 834                 gpio_direction_output(pdata->buck_gpios[0],
 835                                 (s5m8767->buck_gpioindex >> 2) & 0x1);
 836                 /* SET2 GPIO */
 837                 gpio_direction_output(pdata->buck_gpios[1],
 838                                 (s5m8767->buck_gpioindex >> 1) & 0x1);
 839                 /* SET3 GPIO */
 840                 gpio_direction_output(pdata->buck_gpios[2],
 841                                 (s5m8767->buck_gpioindex >> 0) & 0x1);
 842         }
 843
 844         ret = devm_gpio_request(&pdev->dev, pdata->buck_ds[0], "S5M8767 DS2");
 845         if (ret)
 846                 return ret;
 847
 848         ret = devm_gpio_request(&pdev->dev, pdata->buck_ds[1], "S5M8767 DS3");
 849         if (ret)
 850                 return ret;
 851
 852         ret = devm_gpio_request(&pdev->dev, pdata->buck_ds[2], "S5M8767 DS4");
 853         if (ret)
 854                 return ret;
 855
 856         /* DS2 GPIO */
 857         gpio_direction_output(pdata->buck_ds[0], 0x0);
 858         /* DS3 GPIO */
 859         gpio_direction_output(pdata->buck_ds[1], 0x0);
 860         /* DS4 GPIO */
 861         gpio_direction_output(pdata->buck_ds[2], 0x0);
 862
 863         if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs ||
 864            pdata->buck4_gpiodvs) {
 865                 regmap_update_bits(s5m8767->iodev->regmap_pmic,
 866                                 S5M8767_REG_BUCK2CTRL, 1 << 1,
 867                                 (pdata->buck2_gpiodvs) ? (1 << 1) : (0 << 1));
 868                 regmap_update_bits(s5m8767->iodev->regmap_pmic,
 869                                 S5M8767_REG_BUCK3CTRL, 1 << 1,
 870                                 (pdata->buck3_gpiodvs) ? (1 << 1) : (0 << 1));
 871                 regmap_update_bits(s5m8767->iodev->regmap_pmic,
 872                                 S5M8767_REG_BUCK4CTRL, 1 << 1,
 873                                 (pdata->buck4_gpiodvs) ? (1 << 1) : (0 << 1));
 874         }
 875
 876         /* Initialize GPIO DVS registers */
 877         for (i = 0; i < 8; i++) {
 878                 if (s5m8767->buck2_gpiodvs) {
 879                         regmap_write(s5m8767->iodev->regmap_pmic,
 880                                         S5M8767_REG_BUCK2DVS1 + i,
 881                                         s5m8767->buck2_vol[i]);
 882                 }
 883
 884                 if (s5m8767->buck3_gpiodvs) {
 885                         regmap_write(s5m8767->iodev->regmap_pmic,
 886                                         S5M8767_REG_BUCK3DVS1 + i,
 887                                         s5m8767->buck3_vol[i]);
 888                 }
 889
 890                 if (s5m8767->buck4_gpiodvs) {
 891                         regmap_write(s5m8767->iodev->regmap_pmic,
 892                                         S5M8767_REG_BUCK4DVS1 + i,
 893                                         s5m8767->buck4_vol[i]);
 894                 }
 895         }
 896
 897         if (s5m8767->buck2_ramp)
 898                 regmap_update_bits(s5m8767->iodev->regmap_pmic,
 899                                 S5M8767_REG_DVSRAMP, 0x08, 0x08);
 900
 901         if (s5m8767->buck3_ramp)
 902                 regmap_update_bits(s5m8767->iodev->regmap_pmic,
 903                                 S5M8767_REG_DVSRAMP, 0x04, 0x04);
 904
 905         if (s5m8767->buck4_ramp)
 906                 regmap_update_bits(s5m8767->iodev->regmap_pmic,
 907                                 S5M8767_REG_DVSRAMP, 0x02, 0x02);
 908
 909         if (s5m8767->buck2_ramp || s5m8767->buck3_ramp
 910                 || s5m8767->buck4_ramp) {
 911                 unsigned int val;
 912                 switch (s5m8767->ramp_delay) {
 913                 case 5:
 914                         val = S5M8767_DVS_BUCK_RAMP_5;
 915                         break;
 916                 case 10:
 917                         val = S5M8767_DVS_BUCK_RAMP_10;
 918                         break;
 919                 case 25:
 920                         val = S5M8767_DVS_BUCK_RAMP_25;
 921                         break;
 922                 case 50:
 923                         val = S5M8767_DVS_BUCK_RAMP_50;
 924                         break;
 925                 case 100:
 926                         val = S5M8767_DVS_BUCK_RAMP_100;
 927                         break;
 928                 default:
 929                         val = S5M8767_DVS_BUCK_RAMP_10;
 930                 }
 931                 regmap_update_bits(s5m8767->iodev->regmap_pmic,
 932                                         S5M8767_REG_DVSRAMP,
 933                                         S5M8767_DVS_BUCK_RAMP_MASK,
 934                                         val << S5M8767_DVS_BUCK_RAMP_SHIFT);
 935         }
 936
 937         for (i = 0; i < pdata->num_regulators; i++) {
 938                 const struct sec_voltage_desc *desc;
 939                 int id = pdata->regulators[i].id;
 940                 int enable_reg, enable_val;
 941
 942                 desc = reg_voltage_map[id];
 943                 if (desc) {
 944                         regulators[id].n_voltages =
 945                                 (desc->max - desc->min) / desc->step + 1;
 946                         regulators[id].min_uV = desc->min;
 947                         regulators[id].uV_step = desc->step;
 948                         regulators[id].vsel_reg =
 949                                 s5m8767_get_vsel_reg(id, s5m8767);
 950                         if (id < S5M8767_BUCK1)
 951                                 regulators[id].vsel_mask = 0x3f;
 952                         else
 953                                 regulators[id].vsel_mask = 0xff;
 954
 955                         s5m8767_get_register(s5m8767, id, &enable_reg,
 956                                              &enable_val);
 957                         regulators[id].enable_reg = enable_reg;
 958                         regulators[id].enable_mask = S5M8767_ENCTRL_MASK;
 959                         regulators[id].enable_val = enable_val;
 960                 }
 961
 962                 config.dev = s5m8767->dev;
 963                 config.init_data = pdata->regulators[i].initdata;
 964                 config.driver_data = s5m8767;
 965                 config.regmap = iodev->regmap_pmic;
 966                 config.of_node = pdata->regulators[i].reg_node;
 967                 if (pdata->regulators[i].ext_control_gpio)
 968                         s5m8767_regulator_config_ext_control(s5m8767,
 969                                         &pdata->regulators[i], &config);
 970
 971                 rdev[i] = devm_regulator_register(&pdev->dev, &regulators[id],
 972                                                   &config);
 973                 if (IS_ERR(rdev[i])) {
 974                         ret = PTR_ERR(rdev[i]);
 975                         dev_err(s5m8767->dev, "regulator init failed for %d\n",
 976                                         id);
 977                         return ret;
 978                 }
 979
 980                 if (pdata->regulators[i].ext_control_gpio) {
 981                         ret = s5m8767_enable_ext_control(s5m8767, rdev[i]);
 982                         if (ret < 0) {
 983                                 dev_err(s5m8767->dev,
 984                                                 "failed to enable gpio control over %s: %d\n",
 985                                                 rdev[i]->desc->name, ret);
 986                                 return ret;
 987                         }
 988                 }
 989         }
 990
 991         return 0;
 992 }
 993
 994 static const struct platform_device_id s5m8767_pmic_id[] = {
 995         { "s5m8767-pmic", 0},
 996         { },
 997 };
 998 MODULE_DEVICE_TABLE(platform, s5m8767_pmic_id);
 999
1000 static struct platform_driver s5m8767_pmic_driver = {
1001         .driver = {
1002                 .name = "s5m8767-pmic",
1003                 .owner = THIS_MODULE,
1004         },
1005         .probe = s5m8767_pmic_probe,
1006         .id_table = s5m8767_pmic_id,
1007 };
1008
1009 static int __init s5m8767_pmic_init(void)
1010 {
1011         return platform_driver_register(&s5m8767_pmic_driver);
1012 }
1013 subsys_initcall(s5m8767_pmic_init);
1014
1015 static void __exit s5m8767_pmic_exit(void)
1016 {
1017         platform_driver_unregister(&s5m8767_pmic_driver);
1018 }
1019 module_exit(s5m8767_pmic_exit);
1020
1021 /* Module information */
1022 MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
1023 MODULE_DESCRIPTION("SAMSUNG S5M8767 Regulator Driver");
1024 MODULE_LICENSE("GPL");