drivers/regulator/s5m8767.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 //
   3 // Copyright (c) 2011 Samsung Electronics Co., Ltd
   4 //              http://www.samsung.com
   5
   6 #include <linux/err.h>
   7 #include <linux/of_gpio.h>
   8 #include <linux/gpio/consumer.h>
   9 #include <linux/module.h>
  10 #include <linux/platform_device.h>
  11 #include <linux/regulator/driver.h>
  12 #include <linux/regulator/machine.h>
  13 #include <linux/mfd/samsung/core.h>
  14 #include <linux/mfd/samsung/s5m8767.h>
  15 #include <linux/regulator/of_regulator.h>
  16 #include <linux/regmap.h>
  17
  18 #define S5M8767_OPMODE_NORMAL_MODE 0x1
  19
  20 struct s5m8767_info {
  21         struct device *dev;
  22         struct sec_pmic_dev *iodev;
  23         int num_regulators;
  24         struct sec_opmode_data *opmode;
  25
  26         int ramp_delay;
  27         bool buck2_ramp;
  28         bool buck3_ramp;
  29         bool buck4_ramp;
  30
  31         bool buck2_gpiodvs;
  32         bool buck3_gpiodvs;
  33         bool buck4_gpiodvs;
  34         u8 buck2_vol[8];
  35         u8 buck3_vol[8];
  36         u8 buck4_vol[8];
  37         int buck_gpios[3];
  38         int buck_ds[3];
  39         int buck_gpioindex;
  40 };
  41
  42 struct sec_voltage_desc {
  43         int max;
  44         int min;
  45         int step;
  46 };
  47
  48 static const struct sec_voltage_desc buck_voltage_val1 = {
  49         .max = 2225000,
  50         .min =  650000,
  51         .step =   6250,
  52 };
  53
  54 static const struct sec_voltage_desc buck_voltage_val2 = {
  55         .max = 1600000,
  56         .min =  600000,
  57         .step =   6250,
  58 };
  59
  60 static const struct sec_voltage_desc buck_voltage_val3 = {
  61         .max = 3000000,
  62         .min =  750000,
  63         .step =  12500,
  64 };
  65
  66 static const struct sec_voltage_desc ldo_voltage_val1 = {
  67         .max = 3950000,
  68         .min =  800000,
  69         .step =  50000,
  70 };
  71
  72 static const struct sec_voltage_desc ldo_voltage_val2 = {
  73         .max = 2375000,
  74         .min =  800000,
  75         .step =  25000,
  76 };
  77
  78 static const struct sec_voltage_desc *reg_voltage_map[] = {
  79         [S5M8767_LDO1] = &ldo_voltage_val2,
  80         [S5M8767_LDO2] = &ldo_voltage_val2,
  81         [S5M8767_LDO3] = &ldo_voltage_val1,
  82         [S5M8767_LDO4] = &ldo_voltage_val1,
  83         [S5M8767_LDO5] = &ldo_voltage_val1,
  84         [S5M8767_LDO6] = &ldo_voltage_val2,
  85         [S5M8767_LDO7] = &ldo_voltage_val2,
  86         [S5M8767_LDO8] = &ldo_voltage_val2,
  87         [S5M8767_LDO9] = &ldo_voltage_val1,
  88         [S5M8767_LDO10] = &ldo_voltage_val1,
  89         [S5M8767_LDO11] = &ldo_voltage_val1,
  90         [S5M8767_LDO12] = &ldo_voltage_val1,
  91         [S5M8767_LDO13] = &ldo_voltage_val1,
  92         [S5M8767_LDO14] = &ldo_voltage_val1,
  93         [S5M8767_LDO15] = &ldo_voltage_val2,
  94         [S5M8767_LDO16] = &ldo_voltage_val1,
  95         [S5M8767_LDO17] = &ldo_voltage_val1,
  96         [S5M8767_LDO18] = &ldo_voltage_val1,
  97         [S5M8767_LDO19] = &ldo_voltage_val1,
  98         [S5M8767_LDO20] = &ldo_voltage_val1,
  99         [S5M8767_LDO21] = &ldo_voltage_val1,
 100         [S5M8767_LDO22] = &ldo_voltage_val1,
 101         [S5M8767_LDO23] = &ldo_voltage_val1,
 102         [S5M8767_LDO24] = &ldo_voltage_val1,
 103         [S5M8767_LDO25] = &ldo_voltage_val1,
 104         [S5M8767_LDO26] = &ldo_voltage_val1,
 105         [S5M8767_LDO27] = &ldo_voltage_val1,
 106         [S5M8767_LDO28] = &ldo_voltage_val1,
 107         [S5M8767_BUCK1] = &buck_voltage_val1,
 108         [S5M8767_BUCK2] = &buck_voltage_val2,
 109         [S5M8767_BUCK3] = &buck_voltage_val2,
 110         [S5M8767_BUCK4] = &buck_voltage_val2,
 111         [S5M8767_BUCK5] = &buck_voltage_val1,
 112         [S5M8767_BUCK6] = &buck_voltage_val1,
 113         [S5M8767_BUCK7] = &buck_voltage_val3,
 114         [S5M8767_BUCK8] = &buck_voltage_val3,
 115         [S5M8767_BUCK9] = &buck_voltage_val3,
 116 };
 117
 118 static const unsigned int s5m8767_opmode_reg[][4] = {
 119         /* {OFF, ON, LOWPOWER, SUSPEND} */
 120         /* LDO1 ... LDO28 */
 121         {0x0, 0x3, 0x2, 0x1}, /* LDO1 */
 122         {0x0, 0x3, 0x2, 0x1},
 123         {0x0, 0x3, 0x2, 0x1},
 124         {0x0, 0x0, 0x0, 0x0},
 125         {0x0, 0x3, 0x2, 0x1}, /* LDO5 */
 126         {0x0, 0x3, 0x2, 0x1},
 127         {0x0, 0x3, 0x2, 0x1},
 128         {0x0, 0x3, 0x2, 0x1},
 129         {0x0, 0x3, 0x2, 0x1},
 130         {0x0, 0x3, 0x2, 0x1}, /* LDO10 */
 131         {0x0, 0x3, 0x2, 0x1},
 132         {0x0, 0x3, 0x2, 0x1},
 133         {0x0, 0x3, 0x2, 0x1},
 134         {0x0, 0x3, 0x2, 0x1},
 135         {0x0, 0x3, 0x2, 0x1}, /* LDO15 */
 136         {0x0, 0x3, 0x2, 0x1},
 137         {0x0, 0x3, 0x2, 0x1},
 138         {0x0, 0x0, 0x0, 0x0},
 139         {0x0, 0x3, 0x2, 0x1},
 140         {0x0, 0x3, 0x2, 0x1}, /* LDO20 */
 141         {0x0, 0x3, 0x2, 0x1},
 142         {0x0, 0x3, 0x2, 0x1},
 143         {0x0, 0x0, 0x0, 0x0},
 144         {0x0, 0x3, 0x2, 0x1},
 145         {0x0, 0x3, 0x2, 0x1}, /* LDO25 */
 146         {0x0, 0x3, 0x2, 0x1},
 147         {0x0, 0x3, 0x2, 0x1},
 148         {0x0, 0x3, 0x2, 0x1}, /* LDO28 */
 149
 150         /* BUCK1 ... BUCK9 */
 151         {0x0, 0x3, 0x1, 0x1}, /* BUCK1 */
 152         {0x0, 0x3, 0x1, 0x1},
 153         {0x0, 0x3, 0x1, 0x1},
 154         {0x0, 0x3, 0x1, 0x1},
 155         {0x0, 0x3, 0x2, 0x1}, /* BUCK5 */
 156         {0x0, 0x3, 0x1, 0x1},
 157         {0x0, 0x3, 0x1, 0x1},
 158         {0x0, 0x3, 0x1, 0x1},
 159         {0x0, 0x3, 0x1, 0x1}, /* BUCK9 */
 160 };
 161
 162 static int s5m8767_get_register(struct s5m8767_info *s5m8767, int reg_id,
 163                                 int *reg, int *enable_ctrl)
 164 {
 165         int i;
 166         unsigned int mode;
 167
 168         switch (reg_id) {
 169         case S5M8767_LDO1 ... S5M8767_LDO2:
 170                 *reg = S5M8767_REG_LDO1CTRL + (reg_id - S5M8767_LDO1);
 171                 break;
 172         case S5M8767_LDO3 ... S5M8767_LDO28:
 173                 *reg = S5M8767_REG_LDO3CTRL + (reg_id - S5M8767_LDO3);
 174                 break;
 175         case S5M8767_BUCK1:
 176                 *reg = S5M8767_REG_BUCK1CTRL1;
 177                 break;
 178         case S5M8767_BUCK2 ... S5M8767_BUCK4:
 179                 *reg = S5M8767_REG_BUCK2CTRL + (reg_id - S5M8767_BUCK2) * 9;
 180                 break;
 181         case S5M8767_BUCK5:
 182                 *reg = S5M8767_REG_BUCK5CTRL1;
 183                 break;
 184         case S5M8767_BUCK6 ... S5M8767_BUCK9:
 185                 *reg = S5M8767_REG_BUCK6CTRL1 + (reg_id - S5M8767_BUCK6) * 2;
 186                 break;
 187         default:
 188                 return -EINVAL;
 189         }
 190
 191         for (i = 0; i < s5m8767->num_regulators; i++) {
 192                 if (s5m8767->opmode[i].id == reg_id) {
 193                         mode = s5m8767->opmode[i].mode;
 194                         break;
 195                 }
 196         }
 197
 198         if (i >= s5m8767->num_regulators)
 199                 return -EINVAL;
 200
 201         *enable_ctrl = s5m8767_opmode_reg[reg_id][mode] << S5M8767_ENCTRL_SHIFT;
 202
 203         return 0;
 204 }
 205
 206 static int s5m8767_get_vsel_reg(int reg_id, struct s5m8767_info *s5m8767)
 207 {
 208         int reg;
 209
 210         switch (reg_id) {
 211         case S5M8767_LDO1 ... S5M8767_LDO2:
 212                 reg = S5M8767_REG_LDO1CTRL + (reg_id - S5M8767_LDO1);
 213                 break;
 214         case S5M8767_LDO3 ... S5M8767_LDO28:
 215                 reg = S5M8767_REG_LDO3CTRL + (reg_id - S5M8767_LDO3);
 216                 break;
 217         case S5M8767_BUCK1:
 218                 reg = S5M8767_REG_BUCK1CTRL2;
 219                 break;
 220         case S5M8767_BUCK2:
 221                 reg = S5M8767_REG_BUCK2DVS1;
 222                 if (s5m8767->buck2_gpiodvs)
 223                         reg += s5m8767->buck_gpioindex;
 224                 break;
 225         case S5M8767_BUCK3:
 226                 reg = S5M8767_REG_BUCK3DVS1;
 227                 if (s5m8767->buck3_gpiodvs)
 228                         reg += s5m8767->buck_gpioindex;
 229                 break;
 230         case S5M8767_BUCK4:
 231                 reg = S5M8767_REG_BUCK4DVS1;
 232                 if (s5m8767->buck4_gpiodvs)
 233                         reg += s5m8767->buck_gpioindex;
 234                 break;
 235         case S5M8767_BUCK5:
 236                 reg = S5M8767_REG_BUCK5CTRL2;
 237                 break;
 238         case S5M8767_BUCK6 ... S5M8767_BUCK9:
 239                 reg = S5M8767_REG_BUCK6CTRL2 + (reg_id - S5M8767_BUCK6) * 2;
 240                 break;
 241         default:
 242                 return -EINVAL;
 243         }
 244
 245         return reg;
 246 }
 247
 248 static int s5m8767_convert_voltage_to_sel(const struct sec_voltage_desc *desc,
 249                                           int min_vol)
 250 {
 251         int selector = 0;
 252
 253         if (desc == NULL)
 254                 return -EINVAL;
 255
 256         if (min_vol > desc->max)
 257                 return -EINVAL;
 258
 259         if (min_vol < desc->min)
 260                 min_vol = desc->min;
 261
 262         selector = DIV_ROUND_UP(min_vol - desc->min, desc->step);
 263
 264         if (desc->min + desc->step * selector > desc->max)
 265                 return -EINVAL;
 266
 267         return selector;
 268 }
 269
 270 static inline int s5m8767_set_high(struct s5m8767_info *s5m8767)
 271 {
 272         int temp_index = s5m8767->buck_gpioindex;
 273
 274         gpio_set_value(s5m8767->buck_gpios[0], (temp_index >> 2) & 0x1);
 275         gpio_set_value(s5m8767->buck_gpios[1], (temp_index >> 1) & 0x1);
 276         gpio_set_value(s5m8767->buck_gpios[2], temp_index & 0x1);
 277
 278         return 0;
 279 }
 280
 281 static inline int s5m8767_set_low(struct s5m8767_info *s5m8767)
 282 {
 283         int temp_index = s5m8767->buck_gpioindex;
 284
 285         gpio_set_value(s5m8767->buck_gpios[2], temp_index & 0x1);
 286         gpio_set_value(s5m8767->buck_gpios[1], (temp_index >> 1) & 0x1);
 287         gpio_set_value(s5m8767->buck_gpios[0], (temp_index >> 2) & 0x1);
 288
 289         return 0;
 290 }
 291
 292 static int s5m8767_set_voltage_sel(struct regulator_dev *rdev,
 293                                    unsigned selector)
 294 {
 295         struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
 296         int reg_id = rdev_get_id(rdev);
 297         int old_index, index = 0;
 298         u8 *buck234_vol = NULL;
 299
 300         switch (reg_id) {
 301         case S5M8767_LDO1 ... S5M8767_LDO28:
 302                 break;
 303         case S5M8767_BUCK1 ... S5M8767_BUCK6:
 304                 if (reg_id == S5M8767_BUCK2 && s5m8767->buck2_gpiodvs)
 305                         buck234_vol = &s5m8767->buck2_vol[0];
 306                 else if (reg_id == S5M8767_BUCK3 && s5m8767->buck3_gpiodvs)
 307                         buck234_vol = &s5m8767->buck3_vol[0];
 308                 else if (reg_id == S5M8767_BUCK4 && s5m8767->buck4_gpiodvs)
 309                         buck234_vol = &s5m8767->buck4_vol[0];
 310                 break;
 311         case S5M8767_BUCK7 ... S5M8767_BUCK8:
 312                 return -EINVAL;
 313         case S5M8767_BUCK9:
 314                 break;
 315         default:
 316                 return -EINVAL;
 317         }
 318
 319         /* buck234_vol != NULL means to control buck234 voltage via DVS GPIO */
 320         if (buck234_vol) {
 321                 while (*buck234_vol != selector) {
 322                         buck234_vol++;
 323                         index++;
 324                 }
 325                 old_index = s5m8767->buck_gpioindex;
 326                 s5m8767->buck_gpioindex = index;
 327
 328                 if (index > old_index)
 329                         return s5m8767_set_high(s5m8767);
 330                 else
 331                         return s5m8767_set_low(s5m8767);
 332         } else {
 333                 return regulator_set_voltage_sel_regmap(rdev, selector);
 334         }
 335 }
 336
 337 static int s5m8767_set_voltage_time_sel(struct regulator_dev *rdev,
 338                                              unsigned int old_sel,
 339                                              unsigned int new_sel)
 340 {
 341         struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
 342
 343         if ((old_sel < new_sel) && s5m8767->ramp_delay)
 344                 return DIV_ROUND_UP(rdev->desc->uV_step * (new_sel - old_sel),
 345                                         s5m8767->ramp_delay * 1000);
 346         return 0;
 347 }
 348
 349 static const struct regulator_ops s5m8767_ops = {
 350         .list_voltage           = regulator_list_voltage_linear,
 351         .is_enabled             = regulator_is_enabled_regmap,
 352         .enable                 = regulator_enable_regmap,
 353         .disable                = regulator_disable_regmap,
 354         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 355         .set_voltage_sel        = s5m8767_set_voltage_sel,
 356         .set_voltage_time_sel   = s5m8767_set_voltage_time_sel,
 357 };
 358
 359 static const struct regulator_ops s5m8767_buck78_ops = {
 360         .list_voltage           = regulator_list_voltage_linear,
 361         .is_enabled             = regulator_is_enabled_regmap,
 362         .enable                 = regulator_enable_regmap,
 363         .disable                = regulator_disable_regmap,
 364         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 365         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 366 };
 367
 368 #define s5m8767_regulator_desc(_name) {         \
 369         .name           = #_name,               \
 370         .id             = S5M8767_##_name,      \
 371         .ops            = &s5m8767_ops,         \
 372         .type           = REGULATOR_VOLTAGE,    \
 373         .owner          = THIS_MODULE,          \
 374 }
 375
 376 #define s5m8767_regulator_buck78_desc(_name) {  \
 377         .name           = #_name,               \
 378         .id             = S5M8767_##_name,      \
 379         .ops            = &s5m8767_buck78_ops,  \
 380         .type           = REGULATOR_VOLTAGE,    \
 381         .owner          = THIS_MODULE,          \
 382 }
 383
 384 static struct regulator_desc regulators[] = {
 385         s5m8767_regulator_desc(LDO1),
 386         s5m8767_regulator_desc(LDO2),
 387         s5m8767_regulator_desc(LDO3),
 388         s5m8767_regulator_desc(LDO4),
 389         s5m8767_regulator_desc(LDO5),
 390         s5m8767_regulator_desc(LDO6),
 391         s5m8767_regulator_desc(LDO7),
 392         s5m8767_regulator_desc(LDO8),
 393         s5m8767_regulator_desc(LDO9),
 394         s5m8767_regulator_desc(LDO10),
 395         s5m8767_regulator_desc(LDO11),
 396         s5m8767_regulator_desc(LDO12),
 397         s5m8767_regulator_desc(LDO13),
 398         s5m8767_regulator_desc(LDO14),
 399         s5m8767_regulator_desc(LDO15),
 400         s5m8767_regulator_desc(LDO16),
 401         s5m8767_regulator_desc(LDO17),
 402         s5m8767_regulator_desc(LDO18),
 403         s5m8767_regulator_desc(LDO19),
 404         s5m8767_regulator_desc(LDO20),
 405         s5m8767_regulator_desc(LDO21),
 406         s5m8767_regulator_desc(LDO22),
 407         s5m8767_regulator_desc(LDO23),
 408         s5m8767_regulator_desc(LDO24),
 409         s5m8767_regulator_desc(LDO25),
 410         s5m8767_regulator_desc(LDO26),
 411         s5m8767_regulator_desc(LDO27),
 412         s5m8767_regulator_desc(LDO28),
 413         s5m8767_regulator_desc(BUCK1),
 414         s5m8767_regulator_desc(BUCK2),
 415         s5m8767_regulator_desc(BUCK3),
 416         s5m8767_regulator_desc(BUCK4),
 417         s5m8767_regulator_desc(BUCK5),
 418         s5m8767_regulator_desc(BUCK6),
 419         s5m8767_regulator_buck78_desc(BUCK7),
 420         s5m8767_regulator_buck78_desc(BUCK8),
 421         s5m8767_regulator_desc(BUCK9),
 422 };
 423
 424 /*
 425  * Enable GPIO control over BUCK9 in regulator_config for that regulator.
 426  */
 427 static void s5m8767_regulator_config_ext_control(struct s5m8767_info *s5m8767,
 428                 struct sec_regulator_data *rdata,
 429                 struct regulator_config *config)
 430 {
 431         int i, mode = 0;
 432
 433         if (rdata->id != S5M8767_BUCK9)
 434                 return;
 435
 436         /* Check if opmode for regulator matches S5M8767_ENCTRL_USE_GPIO */
 437         for (i = 0; i < s5m8767->num_regulators; i++) {
 438                 const struct sec_opmode_data *opmode = &s5m8767->opmode[i];
 439                 if (opmode->id == rdata->id) {
 440                         mode = s5m8767_opmode_reg[rdata->id][opmode->mode];
 441                         break;
 442                 }
 443         }
 444         if (mode != S5M8767_ENCTRL_USE_GPIO) {
 445                 dev_warn(s5m8767->dev,
 446                                 "ext-control for %pOFn: mismatched op_mode (%x), ignoring\n",
 447                                 rdata->reg_node, mode);
 448                 return;
 449         }
 450
 451         if (!rdata->ext_control_gpiod) {
 452                 dev_warn(s5m8767->dev,
 453                                 "ext-control for %pOFn: GPIO not valid, ignoring\n",
 454                          rdata->reg_node);
 455                 return;
 456         }
 457
 458         config->ena_gpiod = rdata->ext_control_gpiod;
 459 }
 460
 461 /*
 462  * Turn on GPIO control over BUCK9.
 463  */
 464 static int s5m8767_enable_ext_control(struct s5m8767_info *s5m8767,
 465                 struct regulator_dev *rdev)
 466 {
 467         int id = rdev_get_id(rdev);
 468         int ret, reg, enable_ctrl;
 469
 470         if (id != S5M8767_BUCK9)
 471                 return -EINVAL;
 472
 473         ret = s5m8767_get_register(s5m8767, id, &reg, &enable_ctrl);
 474         if (ret)
 475                 return ret;
 476
 477         return regmap_update_bits(s5m8767->iodev->regmap_pmic,
 478                         reg, S5M8767_ENCTRL_MASK,
 479                         S5M8767_ENCTRL_USE_GPIO << S5M8767_ENCTRL_SHIFT);
 480 }
 481
 482
 483 #ifdef CONFIG_OF
 484 static int s5m8767_pmic_dt_parse_dvs_gpio(struct sec_pmic_dev *iodev,
 485                         struct sec_platform_data *pdata,
 486                         struct device_node *pmic_np)
 487 {
 488         int i, gpio;
 489
 490         for (i = 0; i < 3; i++) {
 491                 gpio = of_get_named_gpio(pmic_np,
 492                                         "s5m8767,pmic-buck-dvs-gpios", i);
 493                 if (!gpio_is_valid(gpio)) {
 494                         dev_err(iodev->dev, "invalid gpio[%d]: %d\n", i, gpio);
 495                         return -EINVAL;
 496                 }
 497                 pdata->buck_gpios[i] = gpio;
 498         }
 499         return 0;
 500 }
 501
 502 static int s5m8767_pmic_dt_parse_ds_gpio(struct sec_pmic_dev *iodev,
 503                         struct sec_platform_data *pdata,
 504                         struct device_node *pmic_np)
 505 {
 506         int i, gpio;
 507
 508         for (i = 0; i < 3; i++) {
 509                 gpio = of_get_named_gpio(pmic_np,
 510                                         "s5m8767,pmic-buck-ds-gpios", i);
 511                 if (!gpio_is_valid(gpio)) {
 512                         dev_err(iodev->dev, "invalid gpio[%d]: %d\n", i, gpio);
 513                         return -EINVAL;
 514                 }
 515                 pdata->buck_ds[i] = gpio;
 516         }
 517         return 0;
 518 }
 519
 520 static int s5m8767_pmic_dt_parse_pdata(struct platform_device *pdev,
 521                                         struct sec_platform_data *pdata)
 522 {
 523         struct sec_pmic_dev *iodev = dev_get_drvdata(pdev->dev.parent);
 524         struct device_node *pmic_np, *regulators_np, *reg_np;
 525         struct sec_regulator_data *rdata;
 526         struct sec_opmode_data *rmode;
 527         unsigned int i, dvs_voltage_nr = 8, ret;
 528
 529         pmic_np = iodev->dev->of_node;
 530         if (!pmic_np) {
 531                 dev_err(iodev->dev, "could not find pmic sub-node\n");
 532                 return -ENODEV;
 533         }
 534
 535         regulators_np = of_get_child_by_name(pmic_np, "regulators");
 536         if (!regulators_np) {
 537                 dev_err(iodev->dev, "could not find regulators sub-node\n");
 538                 return -EINVAL;
 539         }
 540
 541         /* count the number of regulators to be supported in pmic */
 542         pdata->num_regulators = of_get_child_count(regulators_np);
 543
 544         rdata = devm_kcalloc(&pdev->dev,
 545                              pdata->num_regulators, sizeof(*rdata),
 546                              GFP_KERNEL);
 547         if (!rdata)
 548                 return -ENOMEM;
 549
 550         rmode = devm_kcalloc(&pdev->dev,
 551                              pdata->num_regulators, sizeof(*rmode),
 552                              GFP_KERNEL);
 553         if (!rmode)
 554                 return -ENOMEM;
 555
 556         pdata->regulators = rdata;
 557         pdata->opmode = rmode;
 558         for_each_child_of_node(regulators_np, reg_np) {
 559                 for (i = 0; i < ARRAY_SIZE(regulators); i++)
 560                         if (of_node_name_eq(reg_np, regulators[i].name))
 561                                 break;
 562
 563                 if (i == ARRAY_SIZE(regulators)) {
 564                         dev_warn(iodev->dev,
 565                         "don't know how to configure regulator %pOFn\n",
 566                         reg_np);
 567                         continue;
 568                 }
 569
 570                 rdata->ext_control_gpiod = devm_gpiod_get_from_of_node(
 571                         &pdev->dev,
 572                         reg_np,
 573                         "s5m8767,pmic-ext-control-gpios",
 574                         0,
 575                         GPIOD_OUT_HIGH | GPIOD_FLAGS_BIT_NONEXCLUSIVE,
 576                         "s5m8767");
 577                 if (IS_ERR(rdata->ext_control_gpiod))
 578                         return PTR_ERR(rdata->ext_control_gpiod);
 579
 580                 rdata->id = i;
 581                 rdata->initdata = of_get_regulator_init_data(
 582                                                 &pdev->dev, reg_np,
 583                                                 &regulators[i]);
 584                 rdata->reg_node = reg_np;
 585                 rdata++;
 586                 rmode->id = i;
 587                 if (of_property_read_u32(reg_np, "op_mode",
 588                                 &rmode->mode)) {
 589                         dev_warn(iodev->dev,
 590                                 "no op_mode property property at %pOF\n",
 591                                 reg_np);
 592
 593                         rmode->mode = S5M8767_OPMODE_NORMAL_MODE;
 594                 }
 595                 rmode++;
 596         }
 597
 598         of_node_put(regulators_np);
 599
 600         if (of_get_property(pmic_np, "s5m8767,pmic-buck2-uses-gpio-dvs", NULL)) {
 601                 pdata->buck2_gpiodvs = true;
 602
 603                 if (of_property_read_u32_array(pmic_np,
 604                                 "s5m8767,pmic-buck2-dvs-voltage",
 605                                 pdata->buck2_voltage, dvs_voltage_nr)) {
 606                         dev_err(iodev->dev, "buck2 voltages not specified\n");
 607                         return -EINVAL;
 608                 }
 609         }
 610
 611         if (of_get_property(pmic_np, "s5m8767,pmic-buck3-uses-gpio-dvs", NULL)) {
 612                 pdata->buck3_gpiodvs = true;
 613
 614                 if (of_property_read_u32_array(pmic_np,
 615                                 "s5m8767,pmic-buck3-dvs-voltage",
 616                                 pdata->buck3_voltage, dvs_voltage_nr)) {
 617                         dev_err(iodev->dev, "buck3 voltages not specified\n");
 618                         return -EINVAL;
 619                 }
 620         }
 621
 622         if (of_get_property(pmic_np, "s5m8767,pmic-buck4-uses-gpio-dvs", NULL)) {
 623                 pdata->buck4_gpiodvs = true;
 624
 625                 if (of_property_read_u32_array(pmic_np,
 626                                 "s5m8767,pmic-buck4-dvs-voltage",
 627                                 pdata->buck4_voltage, dvs_voltage_nr)) {
 628                         dev_err(iodev->dev, "buck4 voltages not specified\n");
 629                         return -EINVAL;
 630                 }
 631         }
 632
 633         if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs ||
 634                                                 pdata->buck4_gpiodvs) {
 635                 ret = s5m8767_pmic_dt_parse_dvs_gpio(iodev, pdata, pmic_np);
 636                 if (ret)
 637                         return -EINVAL;
 638
 639                 if (of_property_read_u32(pmic_np,
 640                                 "s5m8767,pmic-buck-default-dvs-idx",
 641                                 &pdata->buck_default_idx)) {
 642                         pdata->buck_default_idx = 0;
 643                 } else {
 644                         if (pdata->buck_default_idx >= 8) {
 645                                 pdata->buck_default_idx = 0;
 646                                 dev_info(iodev->dev,
 647                                 "invalid value for default dvs index, use 0\n");
 648                         }
 649                 }
 650         }
 651
 652         ret = s5m8767_pmic_dt_parse_ds_gpio(iodev, pdata, pmic_np);
 653         if (ret)
 654                 return -EINVAL;
 655
 656         if (of_get_property(pmic_np, "s5m8767,pmic-buck2-ramp-enable", NULL))
 657                 pdata->buck2_ramp_enable = true;
 658
 659         if (of_get_property(pmic_np, "s5m8767,pmic-buck3-ramp-enable", NULL))
 660                 pdata->buck3_ramp_enable = true;
 661
 662         if (of_get_property(pmic_np, "s5m8767,pmic-buck4-ramp-enable", NULL))
 663                 pdata->buck4_ramp_enable = true;
 664
 665         if (pdata->buck2_ramp_enable || pdata->buck3_ramp_enable
 666                         || pdata->buck4_ramp_enable) {
 667                 if (of_property_read_u32(pmic_np, "s5m8767,pmic-buck-ramp-delay",
 668                                 &pdata->buck_ramp_delay))
 669                         pdata->buck_ramp_delay = 0;
 670         }
 671
 672         return 0;
 673 }
 674 #else
 675 static int s5m8767_pmic_dt_parse_pdata(struct platform_device *pdev,
 676                                         struct sec_platform_data *pdata)
 677 {
 678         return 0;
 679 }
 680 #endif /* CONFIG_OF */
 681
 682 static int s5m8767_pmic_probe(struct platform_device *pdev)
 683 {
 684         struct sec_pmic_dev *iodev = dev_get_drvdata(pdev->dev.parent);
 685         struct sec_platform_data *pdata = iodev->pdata;
 686         struct regulator_config config = { };
 687         struct s5m8767_info *s5m8767;
 688         int i, ret, buck_init;
 689
 690         if (!pdata) {
 691                 dev_err(pdev->dev.parent, "Platform data not supplied\n");
 692                 return -ENODEV;
 693         }
 694
 695         if (iodev->dev->of_node) {
 696                 ret = s5m8767_pmic_dt_parse_pdata(pdev, pdata);
 697                 if (ret)
 698                         return ret;
 699         }
 700
 701         if (pdata->buck2_gpiodvs) {
 702                 if (pdata->buck3_gpiodvs || pdata->buck4_gpiodvs) {
 703                         dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n");
 704                         return -EINVAL;
 705                 }
 706         }
 707
 708         if (pdata->buck3_gpiodvs) {
 709                 if (pdata->buck2_gpiodvs || pdata->buck4_gpiodvs) {
 710                         dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n");
 711                         return -EINVAL;
 712                 }
 713         }
 714
 715         if (pdata->buck4_gpiodvs) {
 716                 if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs) {
 717                         dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n");
 718                         return -EINVAL;
 719                 }
 720         }
 721
 722         s5m8767 = devm_kzalloc(&pdev->dev, sizeof(struct s5m8767_info),
 723                                 GFP_KERNEL);
 724         if (!s5m8767)
 725                 return -ENOMEM;
 726
 727         s5m8767->dev = &pdev->dev;
 728         s5m8767->iodev = iodev;
 729         s5m8767->num_regulators = pdata->num_regulators;
 730         platform_set_drvdata(pdev, s5m8767);
 731
 732         s5m8767->buck_gpioindex = pdata->buck_default_idx;
 733         s5m8767->buck2_gpiodvs = pdata->buck2_gpiodvs;
 734         s5m8767->buck3_gpiodvs = pdata->buck3_gpiodvs;
 735         s5m8767->buck4_gpiodvs = pdata->buck4_gpiodvs;
 736         s5m8767->buck_gpios[0] = pdata->buck_gpios[0];
 737         s5m8767->buck_gpios[1] = pdata->buck_gpios[1];
 738         s5m8767->buck_gpios[2] = pdata->buck_gpios[2];
 739         s5m8767->buck_ds[0] = pdata->buck_ds[0];
 740         s5m8767->buck_ds[1] = pdata->buck_ds[1];
 741         s5m8767->buck_ds[2] = pdata->buck_ds[2];
 742
 743         s5m8767->ramp_delay = pdata->buck_ramp_delay;
 744         s5m8767->buck2_ramp = pdata->buck2_ramp_enable;
 745         s5m8767->buck3_ramp = pdata->buck3_ramp_enable;
 746         s5m8767->buck4_ramp = pdata->buck4_ramp_enable;
 747         s5m8767->opmode = pdata->opmode;
 748
 749         buck_init = s5m8767_convert_voltage_to_sel(&buck_voltage_val2,
 750                                                    pdata->buck2_init);
 751
 752         regmap_write(s5m8767->iodev->regmap_pmic, S5M8767_REG_BUCK2DVS2,
 753                         buck_init);
 754
 755         buck_init = s5m8767_convert_voltage_to_sel(&buck_voltage_val2,
 756                                                    pdata->buck3_init);
 757
 758         regmap_write(s5m8767->iodev->regmap_pmic, S5M8767_REG_BUCK3DVS2,
 759                         buck_init);
 760
 761         buck_init = s5m8767_convert_voltage_to_sel(&buck_voltage_val2,
 762                                                    pdata->buck4_init);
 763
 764         regmap_write(s5m8767->iodev->regmap_pmic, S5M8767_REG_BUCK4DVS2,
 765                         buck_init);
 766
 767         for (i = 0; i < 8; i++) {
 768                 if (s5m8767->buck2_gpiodvs) {
 769                         s5m8767->buck2_vol[i] =
 770                                 s5m8767_convert_voltage_to_sel(
 771                                                 &buck_voltage_val2,
 772                                                 pdata->buck2_voltage[i]);
 773                 }
 774
 775                 if (s5m8767->buck3_gpiodvs) {
 776                         s5m8767->buck3_vol[i] =
 777                                 s5m8767_convert_voltage_to_sel(
 778                                                 &buck_voltage_val2,
 779                                                 pdata->buck3_voltage[i]);
 780                 }
 781
 782                 if (s5m8767->buck4_gpiodvs) {
 783                         s5m8767->buck4_vol[i] =
 784                                 s5m8767_convert_voltage_to_sel(
 785                                                 &buck_voltage_val2,
 786                                                 pdata->buck4_voltage[i]);
 787                 }
 788         }
 789
 790         if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs ||
 791                                                 pdata->buck4_gpiodvs) {
 792
 793                 if (!gpio_is_valid(pdata->buck_gpios[0]) ||
 794                         !gpio_is_valid(pdata->buck_gpios[1]) ||
 795                         !gpio_is_valid(pdata->buck_gpios[2])) {
 796                         dev_err(&pdev->dev, "GPIO NOT VALID\n");
 797                         return -EINVAL;
 798                 }
 799
 800                 ret = devm_gpio_request(&pdev->dev, pdata->buck_gpios[0],
 801                                         "S5M8767 SET1");
 802                 if (ret)
 803                         return ret;
 804
 805                 ret = devm_gpio_request(&pdev->dev, pdata->buck_gpios[1],
 806                                         "S5M8767 SET2");
 807                 if (ret)
 808                         return ret;
 809
 810                 ret = devm_gpio_request(&pdev->dev, pdata->buck_gpios[2],
 811                                         "S5M8767 SET3");
 812                 if (ret)
 813                         return ret;
 814
 815                 /* SET1 GPIO */
 816                 gpio_direction_output(pdata->buck_gpios[0],
 817                                 (s5m8767->buck_gpioindex >> 2) & 0x1);
 818                 /* SET2 GPIO */
 819                 gpio_direction_output(pdata->buck_gpios[1],
 820                                 (s5m8767->buck_gpioindex >> 1) & 0x1);
 821                 /* SET3 GPIO */
 822                 gpio_direction_output(pdata->buck_gpios[2],
 823                                 (s5m8767->buck_gpioindex >> 0) & 0x1);
 824         }
 825
 826         ret = devm_gpio_request(&pdev->dev, pdata->buck_ds[0], "S5M8767 DS2");
 827         if (ret)
 828                 return ret;
 829
 830         ret = devm_gpio_request(&pdev->dev, pdata->buck_ds[1], "S5M8767 DS3");
 831         if (ret)
 832                 return ret;
 833
 834         ret = devm_gpio_request(&pdev->dev, pdata->buck_ds[2], "S5M8767 DS4");
 835         if (ret)
 836                 return ret;
 837
 838         /* DS2 GPIO */
 839         gpio_direction_output(pdata->buck_ds[0], 0x0);
 840         /* DS3 GPIO */
 841         gpio_direction_output(pdata->buck_ds[1], 0x0);
 842         /* DS4 GPIO */
 843         gpio_direction_output(pdata->buck_ds[2], 0x0);
 844
 845         if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs ||
 846            pdata->buck4_gpiodvs) {
 847                 regmap_update_bits(s5m8767->iodev->regmap_pmic,
 848                                 S5M8767_REG_BUCK2CTRL, 1 << 1,
 849                                 (pdata->buck2_gpiodvs) ? (1 << 1) : (0 << 1));
 850                 regmap_update_bits(s5m8767->iodev->regmap_pmic,
 851                                 S5M8767_REG_BUCK3CTRL, 1 << 1,
 852                                 (pdata->buck3_gpiodvs) ? (1 << 1) : (0 << 1));
 853                 regmap_update_bits(s5m8767->iodev->regmap_pmic,
 854                                 S5M8767_REG_BUCK4CTRL, 1 << 1,
 855                                 (pdata->buck4_gpiodvs) ? (1 << 1) : (0 << 1));
 856         }
 857
 858         /* Initialize GPIO DVS registers */
 859         for (i = 0; i < 8; i++) {
 860                 if (s5m8767->buck2_gpiodvs) {
 861                         regmap_write(s5m8767->iodev->regmap_pmic,
 862                                         S5M8767_REG_BUCK2DVS1 + i,
 863                                         s5m8767->buck2_vol[i]);
 864                 }
 865
 866                 if (s5m8767->buck3_gpiodvs) {
 867                         regmap_write(s5m8767->iodev->regmap_pmic,
 868                                         S5M8767_REG_BUCK3DVS1 + i,
 869                                         s5m8767->buck3_vol[i]);
 870                 }
 871
 872                 if (s5m8767->buck4_gpiodvs) {
 873                         regmap_write(s5m8767->iodev->regmap_pmic,
 874                                         S5M8767_REG_BUCK4DVS1 + i,
 875                                         s5m8767->buck4_vol[i]);
 876                 }
 877         }
 878
 879         if (s5m8767->buck2_ramp)
 880                 regmap_update_bits(s5m8767->iodev->regmap_pmic,
 881                                 S5M8767_REG_DVSRAMP, 0x08, 0x08);
 882
 883         if (s5m8767->buck3_ramp)
 884                 regmap_update_bits(s5m8767->iodev->regmap_pmic,
 885                                 S5M8767_REG_DVSRAMP, 0x04, 0x04);
 886
 887         if (s5m8767->buck4_ramp)
 888                 regmap_update_bits(s5m8767->iodev->regmap_pmic,
 889                                 S5M8767_REG_DVSRAMP, 0x02, 0x02);
 890
 891         if (s5m8767->buck2_ramp || s5m8767->buck3_ramp
 892                 || s5m8767->buck4_ramp) {
 893                 unsigned int val;
 894                 switch (s5m8767->ramp_delay) {
 895                 case 5:
 896                         val = S5M8767_DVS_BUCK_RAMP_5;
 897                         break;
 898                 case 10:
 899                         val = S5M8767_DVS_BUCK_RAMP_10;
 900                         break;
 901                 case 25:
 902                         val = S5M8767_DVS_BUCK_RAMP_25;
 903                         break;
 904                 case 50:
 905                         val = S5M8767_DVS_BUCK_RAMP_50;
 906                         break;
 907                 case 100:
 908                         val = S5M8767_DVS_BUCK_RAMP_100;
 909                         break;
 910                 default:
 911                         val = S5M8767_DVS_BUCK_RAMP_10;
 912                 }
 913                 regmap_update_bits(s5m8767->iodev->regmap_pmic,
 914                                         S5M8767_REG_DVSRAMP,
 915                                         S5M8767_DVS_BUCK_RAMP_MASK,
 916                                         val << S5M8767_DVS_BUCK_RAMP_SHIFT);
 917         }
 918
 919         for (i = 0; i < pdata->num_regulators; i++) {
 920                 const struct sec_voltage_desc *desc;
 921                 int id = pdata->regulators[i].id;
 922                 int enable_reg, enable_val;
 923                 struct regulator_dev *rdev;
 924
 925                 desc = reg_voltage_map[id];
 926                 if (desc) {
 927                         regulators[id].n_voltages =
 928                                 (desc->max - desc->min) / desc->step + 1;
 929                         regulators[id].min_uV = desc->min;
 930                         regulators[id].uV_step = desc->step;
 931                         regulators[id].vsel_reg =
 932                                 s5m8767_get_vsel_reg(id, s5m8767);
 933                         if (id < S5M8767_BUCK1)
 934                                 regulators[id].vsel_mask = 0x3f;
 935                         else
 936                                 regulators[id].vsel_mask = 0xff;
 937
 938                         ret = s5m8767_get_register(s5m8767, id, &enable_reg,
 939                                              &enable_val);
 940                         if (ret) {
 941                                 dev_err(s5m8767->dev, "error reading registers\n");
 942                                 return ret;
 943                         }
 944                         regulators[id].enable_reg = enable_reg;
 945                         regulators[id].enable_mask = S5M8767_ENCTRL_MASK;
 946                         regulators[id].enable_val = enable_val;
 947                 }
 948
 949                 config.dev = s5m8767->dev;
 950                 config.init_data = pdata->regulators[i].initdata;
 951                 config.driver_data = s5m8767;
 952                 config.regmap = iodev->regmap_pmic;
 953                 config.of_node = pdata->regulators[i].reg_node;
 954                 config.ena_gpiod = NULL;
 955                 if (pdata->regulators[i].ext_control_gpiod) {
 956                         /* Assigns config.ena_gpiod */
 957                         s5m8767_regulator_config_ext_control(s5m8767,
 958                                         &pdata->regulators[i], &config);
 959
 960                         /*
 961                          * Hand the GPIO descriptor management over to the
 962                          * regulator core, remove it from devres management.
 963                          */
 964                         devm_gpiod_unhinge(s5m8767->dev, config.ena_gpiod);
 965                 }
 966                 rdev = devm_regulator_register(&pdev->dev, &regulators[id],
 967                                                   &config);
 968                 if (IS_ERR(rdev)) {
 969                         ret = PTR_ERR(rdev);
 970                         dev_err(s5m8767->dev, "regulator init failed for %d\n",
 971                                         id);
 972                         return ret;
 973                 }
 974
 975                 if (pdata->regulators[i].ext_control_gpiod) {
 976                         ret = s5m8767_enable_ext_control(s5m8767, rdev);
 977                         if (ret < 0) {
 978                                 dev_err(s5m8767->dev,
 979                                                 "failed to enable gpio control over %s: %d\n",
 980                                                 rdev->desc->name, ret);
 981                                 return ret;
 982                         }
 983                 }
 984         }
 985
 986         return 0;
 987 }
 988
 989 static const struct platform_device_id s5m8767_pmic_id[] = {
 990         { "s5m8767-pmic", 0},
 991         { },
 992 };
 993 MODULE_DEVICE_TABLE(platform, s5m8767_pmic_id);
 994
 995 static struct platform_driver s5m8767_pmic_driver = {
 996         .driver = {
 997                 .name = "s5m8767-pmic",
 998         },
 999         .probe = s5m8767_pmic_probe,
1000         .id_table = s5m8767_pmic_id,
1001 };
1002
1003 static int __init s5m8767_pmic_init(void)
1004 {
1005         return platform_driver_register(&s5m8767_pmic_driver);
1006 }
1007 subsys_initcall(s5m8767_pmic_init);
1008
1009 static void __exit s5m8767_pmic_exit(void)
1010 {
1011         platform_driver_unregister(&s5m8767_pmic_driver);
1012 }
1013 module_exit(s5m8767_pmic_exit);
1014
1015 /* Module information */
1016 MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
1017 MODULE_DESCRIPTION("SAMSUNG S5M8767 Regulator Driver");
1018 MODULE_LICENSE("GPL");