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 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         const struct sec_voltage_desc *desc;
 343         int reg_id = rdev_get_id(rdev);
 344
 345         desc = reg_voltage_map[reg_id];
 346
 347         if ((old_sel < new_sel) && s5m8767->ramp_delay)
 348                 return DIV_ROUND_UP(desc->step * (new_sel - old_sel),
 349                                         s5m8767->ramp_delay * 1000);
 350         return 0;
 351 }
 352
 353 static const struct regulator_ops s5m8767_ops = {
 354         .list_voltage           = regulator_list_voltage_linear,
 355         .is_enabled             = regulator_is_enabled_regmap,
 356         .enable                 = regulator_enable_regmap,
 357         .disable                = regulator_disable_regmap,
 358         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 359         .set_voltage_sel        = s5m8767_set_voltage_sel,
 360         .set_voltage_time_sel   = s5m8767_set_voltage_time_sel,
 361 };
 362
 363 static const struct regulator_ops s5m8767_buck78_ops = {
 364         .list_voltage           = regulator_list_voltage_linear,
 365         .is_enabled             = regulator_is_enabled_regmap,
 366         .enable                 = regulator_enable_regmap,
 367         .disable                = regulator_disable_regmap,
 368         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 369         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 370 };
 371
 372 #define s5m8767_regulator_desc(_name) {         \
 373         .name           = #_name,               \
 374         .id             = S5M8767_##_name,      \
 375         .ops            = &s5m8767_ops,         \
 376         .type           = REGULATOR_VOLTAGE,    \
 377         .owner          = THIS_MODULE,          \
 378 }
 379
 380 #define s5m8767_regulator_buck78_desc(_name) {  \
 381         .name           = #_name,               \
 382         .id             = S5M8767_##_name,      \
 383         .ops            = &s5m8767_buck78_ops,  \
 384         .type           = REGULATOR_VOLTAGE,    \
 385         .owner          = THIS_MODULE,          \
 386 }
 387
 388 static struct regulator_desc regulators[] = {
 389         s5m8767_regulator_desc(LDO1),
 390         s5m8767_regulator_desc(LDO2),
 391         s5m8767_regulator_desc(LDO3),
 392         s5m8767_regulator_desc(LDO4),
 393         s5m8767_regulator_desc(LDO5),
 394         s5m8767_regulator_desc(LDO6),
 395         s5m8767_regulator_desc(LDO7),
 396         s5m8767_regulator_desc(LDO8),
 397         s5m8767_regulator_desc(LDO9),
 398         s5m8767_regulator_desc(LDO10),
 399         s5m8767_regulator_desc(LDO11),
 400         s5m8767_regulator_desc(LDO12),
 401         s5m8767_regulator_desc(LDO13),
 402         s5m8767_regulator_desc(LDO14),
 403         s5m8767_regulator_desc(LDO15),
 404         s5m8767_regulator_desc(LDO16),
 405         s5m8767_regulator_desc(LDO17),
 406         s5m8767_regulator_desc(LDO18),
 407         s5m8767_regulator_desc(LDO19),
 408         s5m8767_regulator_desc(LDO20),
 409         s5m8767_regulator_desc(LDO21),
 410         s5m8767_regulator_desc(LDO22),
 411         s5m8767_regulator_desc(LDO23),
 412         s5m8767_regulator_desc(LDO24),
 413         s5m8767_regulator_desc(LDO25),
 414         s5m8767_regulator_desc(LDO26),
 415         s5m8767_regulator_desc(LDO27),
 416         s5m8767_regulator_desc(LDO28),
 417         s5m8767_regulator_desc(BUCK1),
 418         s5m8767_regulator_desc(BUCK2),
 419         s5m8767_regulator_desc(BUCK3),
 420         s5m8767_regulator_desc(BUCK4),
 421         s5m8767_regulator_desc(BUCK5),
 422         s5m8767_regulator_desc(BUCK6),
 423         s5m8767_regulator_buck78_desc(BUCK7),
 424         s5m8767_regulator_buck78_desc(BUCK8),
 425         s5m8767_regulator_desc(BUCK9),
 426 };
 427
 428 /*
 429  * Enable GPIO control over BUCK9 in regulator_config for that regulator.
 430  */
 431 static void s5m8767_regulator_config_ext_control(struct s5m8767_info *s5m8767,
 432                 struct sec_regulator_data *rdata,
 433                 struct regulator_config *config)
 434 {
 435         int i, mode = 0;
 436
 437         if (rdata->id != S5M8767_BUCK9)
 438                 return;
 439
 440         /* Check if opmode for regulator matches S5M8767_ENCTRL_USE_GPIO */
 441         for (i = 0; i < s5m8767->num_regulators; i++) {
 442                 const struct sec_opmode_data *opmode = &s5m8767->opmode[i];
 443                 if (opmode->id == rdata->id) {
 444                         mode = s5m8767_opmode_reg[rdata->id][opmode->mode];
 445                         break;
 446                 }
 447         }
 448         if (mode != S5M8767_ENCTRL_USE_GPIO) {
 449                 dev_warn(s5m8767->dev,
 450                                 "ext-control for %pOFn: mismatched op_mode (%x), ignoring\n",
 451                                 rdata->reg_node, mode);
 452                 return;
 453         }
 454
 455         if (!rdata->ext_control_gpiod) {
 456                 dev_warn(s5m8767->dev,
 457                                 "ext-control for %pOFn: GPIO not valid, ignoring\n",
 458                          rdata->reg_node);
 459                 return;
 460         }
 461
 462         config->ena_gpiod = rdata->ext_control_gpiod;
 463 }
 464
 465 /*
 466  * Turn on GPIO control over BUCK9.
 467  */
 468 static int s5m8767_enable_ext_control(struct s5m8767_info *s5m8767,
 469                 struct regulator_dev *rdev)
 470 {
 471         int id = rdev_get_id(rdev);
 472         int ret, reg, enable_ctrl;
 473
 474         if (id != S5M8767_BUCK9)
 475                 return -EINVAL;
 476
 477         ret = s5m8767_get_register(s5m8767, id, &reg, &enable_ctrl);
 478         if (ret)
 479                 return ret;
 480
 481         return regmap_update_bits(s5m8767->iodev->regmap_pmic,
 482                         reg, S5M8767_ENCTRL_MASK,
 483                         S5M8767_ENCTRL_USE_GPIO << S5M8767_ENCTRL_SHIFT);
 484 }
 485
 486
 487 #ifdef CONFIG_OF
 488 static int s5m8767_pmic_dt_parse_dvs_gpio(struct sec_pmic_dev *iodev,
 489                         struct sec_platform_data *pdata,
 490                         struct device_node *pmic_np)
 491 {
 492         int i, gpio;
 493
 494         for (i = 0; i < 3; i++) {
 495                 gpio = of_get_named_gpio(pmic_np,
 496                                         "s5m8767,pmic-buck-dvs-gpios", i);
 497                 if (!gpio_is_valid(gpio)) {
 498                         dev_err(iodev->dev, "invalid gpio[%d]: %d\n", i, gpio);
 499                         return -EINVAL;
 500                 }
 501                 pdata->buck_gpios[i] = gpio;
 502         }
 503         return 0;
 504 }
 505
 506 static int s5m8767_pmic_dt_parse_ds_gpio(struct sec_pmic_dev *iodev,
 507                         struct sec_platform_data *pdata,
 508                         struct device_node *pmic_np)
 509 {
 510         int i, gpio;
 511
 512         for (i = 0; i < 3; i++) {
 513                 gpio = of_get_named_gpio(pmic_np,
 514                                         "s5m8767,pmic-buck-ds-gpios", i);
 515                 if (!gpio_is_valid(gpio)) {
 516                         dev_err(iodev->dev, "invalid gpio[%d]: %d\n", i, gpio);
 517                         return -EINVAL;
 518                 }
 519                 pdata->buck_ds[i] = gpio;
 520         }
 521         return 0;
 522 }
 523
 524 static int s5m8767_pmic_dt_parse_pdata(struct platform_device *pdev,
 525                                         struct sec_platform_data *pdata)
 526 {
 527         struct sec_pmic_dev *iodev = dev_get_drvdata(pdev->dev.parent);
 528         struct device_node *pmic_np, *regulators_np, *reg_np;
 529         struct sec_regulator_data *rdata;
 530         struct sec_opmode_data *rmode;
 531         unsigned int i, dvs_voltage_nr = 8, ret;
 532
 533         pmic_np = iodev->dev->of_node;
 534         if (!pmic_np) {
 535                 dev_err(iodev->dev, "could not find pmic sub-node\n");
 536                 return -ENODEV;
 537         }
 538
 539         regulators_np = of_get_child_by_name(pmic_np, "regulators");
 540         if (!regulators_np) {
 541                 dev_err(iodev->dev, "could not find regulators sub-node\n");
 542                 return -EINVAL;
 543         }
 544
 545         /* count the number of regulators to be supported in pmic */
 546         pdata->num_regulators = of_get_child_count(regulators_np);
 547
 548         rdata = devm_kcalloc(&pdev->dev,
 549                              pdata->num_regulators, sizeof(*rdata),
 550                              GFP_KERNEL);
 551         if (!rdata)
 552                 return -ENOMEM;
 553
 554         rmode = devm_kcalloc(&pdev->dev,
 555                              pdata->num_regulators, sizeof(*rmode),
 556                              GFP_KERNEL);
 557         if (!rmode)
 558                 return -ENOMEM;
 559
 560         pdata->regulators = rdata;
 561         pdata->opmode = rmode;
 562         for_each_child_of_node(regulators_np, reg_np) {
 563                 for (i = 0; i < ARRAY_SIZE(regulators); i++)
 564                         if (!of_node_cmp(reg_np->name, regulators[i].name))
 565                                 break;
 566
 567                 if (i == ARRAY_SIZE(regulators)) {
 568                         dev_warn(iodev->dev,
 569                         "don't know how to configure regulator %pOFn\n",
 570                         reg_np);
 571                         continue;
 572                 }
 573
 574                 rdata->ext_control_gpiod = devm_gpiod_get_from_of_node(
 575                         &pdev->dev,
 576                         reg_np,
 577                         "s5m8767,pmic-ext-control-gpios",
 578                         0,
 579                         GPIOD_OUT_HIGH | GPIOD_FLAGS_BIT_NONEXCLUSIVE,
 580                         "s5m8767");
 581                 if (IS_ERR(rdata->ext_control_gpiod))
 582                         return PTR_ERR(rdata->ext_control_gpiod);
 583
 584                 rdata->id = i;
 585                 rdata->initdata = of_get_regulator_init_data(
 586                                                 &pdev->dev, reg_np,
 587                                                 &regulators[i]);
 588                 rdata->reg_node = reg_np;
 589                 rdata++;
 590                 rmode->id = i;
 591                 if (of_property_read_u32(reg_np, "op_mode",
 592                                 &rmode->mode)) {
 593                         dev_warn(iodev->dev,
 594                                 "no op_mode property property at %pOF\n",
 595                                 reg_np);
 596
 597                         rmode->mode = S5M8767_OPMODE_NORMAL_MODE;
 598                 }
 599                 rmode++;
 600         }
 601
 602         of_node_put(regulators_np);
 603
 604         if (of_get_property(pmic_np, "s5m8767,pmic-buck2-uses-gpio-dvs", NULL)) {
 605                 pdata->buck2_gpiodvs = true;
 606
 607                 if (of_property_read_u32_array(pmic_np,
 608                                 "s5m8767,pmic-buck2-dvs-voltage",
 609                                 pdata->buck2_voltage, dvs_voltage_nr)) {
 610                         dev_err(iodev->dev, "buck2 voltages not specified\n");
 611                         return -EINVAL;
 612                 }
 613         }
 614
 615         if (of_get_property(pmic_np, "s5m8767,pmic-buck3-uses-gpio-dvs", NULL)) {
 616                 pdata->buck3_gpiodvs = true;
 617
 618                 if (of_property_read_u32_array(pmic_np,
 619                                 "s5m8767,pmic-buck3-dvs-voltage",
 620                                 pdata->buck3_voltage, dvs_voltage_nr)) {
 621                         dev_err(iodev->dev, "buck3 voltages not specified\n");
 622                         return -EINVAL;
 623                 }
 624         }
 625
 626         if (of_get_property(pmic_np, "s5m8767,pmic-buck4-uses-gpio-dvs", NULL)) {
 627                 pdata->buck4_gpiodvs = true;
 628
 629                 if (of_property_read_u32_array(pmic_np,
 630                                 "s5m8767,pmic-buck4-dvs-voltage",
 631                                 pdata->buck4_voltage, dvs_voltage_nr)) {
 632                         dev_err(iodev->dev, "buck4 voltages not specified\n");
 633                         return -EINVAL;
 634                 }
 635         }
 636
 637         if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs ||
 638                                                 pdata->buck4_gpiodvs) {
 639                 ret = s5m8767_pmic_dt_parse_dvs_gpio(iodev, pdata, pmic_np);
 640                 if (ret)
 641                         return -EINVAL;
 642
 643                 if (of_property_read_u32(pmic_np,
 644                                 "s5m8767,pmic-buck-default-dvs-idx",
 645                                 &pdata->buck_default_idx)) {
 646                         pdata->buck_default_idx = 0;
 647                 } else {
 648                         if (pdata->buck_default_idx >= 8) {
 649                                 pdata->buck_default_idx = 0;
 650                                 dev_info(iodev->dev,
 651                                 "invalid value for default dvs index, use 0\n");
 652                         }
 653                 }
 654         }
 655
 656         ret = s5m8767_pmic_dt_parse_ds_gpio(iodev, pdata, pmic_np);
 657         if (ret)
 658                 return -EINVAL;
 659
 660         if (of_get_property(pmic_np, "s5m8767,pmic-buck2-ramp-enable", NULL))
 661                 pdata->buck2_ramp_enable = true;
 662
 663         if (of_get_property(pmic_np, "s5m8767,pmic-buck3-ramp-enable", NULL))
 664                 pdata->buck3_ramp_enable = true;
 665
 666         if (of_get_property(pmic_np, "s5m8767,pmic-buck4-ramp-enable", NULL))
 667                 pdata->buck4_ramp_enable = true;
 668
 669         if (pdata->buck2_ramp_enable || pdata->buck3_ramp_enable
 670                         || pdata->buck4_ramp_enable) {
 671                 if (of_property_read_u32(pmic_np, "s5m8767,pmic-buck-ramp-delay",
 672                                 &pdata->buck_ramp_delay))
 673                         pdata->buck_ramp_delay = 0;
 674         }
 675
 676         return 0;
 677 }
 678 #else
 679 static int s5m8767_pmic_dt_parse_pdata(struct platform_device *pdev,
 680                                         struct sec_platform_data *pdata)
 681 {
 682         return 0;
 683 }
 684 #endif /* CONFIG_OF */
 685
 686 static int s5m8767_pmic_probe(struct platform_device *pdev)
 687 {
 688         struct sec_pmic_dev *iodev = dev_get_drvdata(pdev->dev.parent);
 689         struct sec_platform_data *pdata = iodev->pdata;
 690         struct regulator_config config = { };
 691         struct s5m8767_info *s5m8767;
 692         int i, ret, buck_init;
 693
 694         if (!pdata) {
 695                 dev_err(pdev->dev.parent, "Platform data not supplied\n");
 696                 return -ENODEV;
 697         }
 698
 699         if (iodev->dev->of_node) {
 700                 ret = s5m8767_pmic_dt_parse_pdata(pdev, pdata);
 701                 if (ret)
 702                         return ret;
 703         }
 704
 705         if (pdata->buck2_gpiodvs) {
 706                 if (pdata->buck3_gpiodvs || pdata->buck4_gpiodvs) {
 707                         dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n");
 708                         return -EINVAL;
 709                 }
 710         }
 711
 712         if (pdata->buck3_gpiodvs) {
 713                 if (pdata->buck2_gpiodvs || pdata->buck4_gpiodvs) {
 714                         dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n");
 715                         return -EINVAL;
 716                 }
 717         }
 718
 719         if (pdata->buck4_gpiodvs) {
 720                 if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs) {
 721                         dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n");
 722                         return -EINVAL;
 723                 }
 724         }
 725
 726         s5m8767 = devm_kzalloc(&pdev->dev, sizeof(struct s5m8767_info),
 727                                 GFP_KERNEL);
 728         if (!s5m8767)
 729                 return -ENOMEM;
 730
 731         s5m8767->dev = &pdev->dev;
 732         s5m8767->iodev = iodev;
 733         s5m8767->num_regulators = pdata->num_regulators;
 734         platform_set_drvdata(pdev, s5m8767);
 735
 736         s5m8767->buck_gpioindex = pdata->buck_default_idx;
 737         s5m8767->buck2_gpiodvs = pdata->buck2_gpiodvs;
 738         s5m8767->buck3_gpiodvs = pdata->buck3_gpiodvs;
 739         s5m8767->buck4_gpiodvs = pdata->buck4_gpiodvs;
 740         s5m8767->buck_gpios[0] = pdata->buck_gpios[0];
 741         s5m8767->buck_gpios[1] = pdata->buck_gpios[1];
 742         s5m8767->buck_gpios[2] = pdata->buck_gpios[2];
 743         s5m8767->buck_ds[0] = pdata->buck_ds[0];
 744         s5m8767->buck_ds[1] = pdata->buck_ds[1];
 745         s5m8767->buck_ds[2] = pdata->buck_ds[2];
 746
 747         s5m8767->ramp_delay = pdata->buck_ramp_delay;
 748         s5m8767->buck2_ramp = pdata->buck2_ramp_enable;
 749         s5m8767->buck3_ramp = pdata->buck3_ramp_enable;
 750         s5m8767->buck4_ramp = pdata->buck4_ramp_enable;
 751         s5m8767->opmode = pdata->opmode;
 752
 753         buck_init = s5m8767_convert_voltage_to_sel(&buck_voltage_val2,
 754                                                    pdata->buck2_init);
 755
 756         regmap_write(s5m8767->iodev->regmap_pmic, S5M8767_REG_BUCK2DVS2,
 757                         buck_init);
 758
 759         buck_init = s5m8767_convert_voltage_to_sel(&buck_voltage_val2,
 760                                                    pdata->buck3_init);
 761
 762         regmap_write(s5m8767->iodev->regmap_pmic, S5M8767_REG_BUCK3DVS2,
 763                         buck_init);
 764
 765         buck_init = s5m8767_convert_voltage_to_sel(&buck_voltage_val2,
 766                                                    pdata->buck4_init);
 767
 768         regmap_write(s5m8767->iodev->regmap_pmic, S5M8767_REG_BUCK4DVS2,
 769                         buck_init);
 770
 771         for (i = 0; i < 8; i++) {
 772                 if (s5m8767->buck2_gpiodvs) {
 773                         s5m8767->buck2_vol[i] =
 774                                 s5m8767_convert_voltage_to_sel(
 775                                                 &buck_voltage_val2,
 776                                                 pdata->buck2_voltage[i]);
 777                 }
 778
 779                 if (s5m8767->buck3_gpiodvs) {
 780                         s5m8767->buck3_vol[i] =
 781                                 s5m8767_convert_voltage_to_sel(
 782                                                 &buck_voltage_val2,
 783                                                 pdata->buck3_voltage[i]);
 784                 }
 785
 786                 if (s5m8767->buck4_gpiodvs) {
 787                         s5m8767->buck4_vol[i] =
 788                                 s5m8767_convert_voltage_to_sel(
 789                                                 &buck_voltage_val2,
 790                                                 pdata->buck4_voltage[i]);
 791                 }
 792         }
 793
 794         if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs ||
 795                                                 pdata->buck4_gpiodvs) {
 796
 797                 if (!gpio_is_valid(pdata->buck_gpios[0]) ||
 798                         !gpio_is_valid(pdata->buck_gpios[1]) ||
 799                         !gpio_is_valid(pdata->buck_gpios[2])) {
 800                         dev_err(&pdev->dev, "GPIO NOT VALID\n");
 801                         return -EINVAL;
 802                 }
 803
 804                 ret = devm_gpio_request(&pdev->dev, pdata->buck_gpios[0],
 805                                         "S5M8767 SET1");
 806                 if (ret)
 807                         return ret;
 808
 809                 ret = devm_gpio_request(&pdev->dev, pdata->buck_gpios[1],
 810                                         "S5M8767 SET2");
 811                 if (ret)
 812                         return ret;
 813
 814                 ret = devm_gpio_request(&pdev->dev, pdata->buck_gpios[2],
 815                                         "S5M8767 SET3");
 816                 if (ret)
 817                         return ret;
 818
 819                 /* SET1 GPIO */
 820                 gpio_direction_output(pdata->buck_gpios[0],
 821                                 (s5m8767->buck_gpioindex >> 2) & 0x1);
 822                 /* SET2 GPIO */
 823                 gpio_direction_output(pdata->buck_gpios[1],
 824                                 (s5m8767->buck_gpioindex >> 1) & 0x1);
 825                 /* SET3 GPIO */
 826                 gpio_direction_output(pdata->buck_gpios[2],
 827                                 (s5m8767->buck_gpioindex >> 0) & 0x1);
 828         }
 829
 830         ret = devm_gpio_request(&pdev->dev, pdata->buck_ds[0], "S5M8767 DS2");
 831         if (ret)
 832                 return ret;
 833
 834         ret = devm_gpio_request(&pdev->dev, pdata->buck_ds[1], "S5M8767 DS3");
 835         if (ret)
 836                 return ret;
 837
 838         ret = devm_gpio_request(&pdev->dev, pdata->buck_ds[2], "S5M8767 DS4");
 839         if (ret)
 840                 return ret;
 841
 842         /* DS2 GPIO */
 843         gpio_direction_output(pdata->buck_ds[0], 0x0);
 844         /* DS3 GPIO */
 845         gpio_direction_output(pdata->buck_ds[1], 0x0);
 846         /* DS4 GPIO */
 847         gpio_direction_output(pdata->buck_ds[2], 0x0);
 848
 849         if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs ||
 850            pdata->buck4_gpiodvs) {
 851                 regmap_update_bits(s5m8767->iodev->regmap_pmic,
 852                                 S5M8767_REG_BUCK2CTRL, 1 << 1,
 853                                 (pdata->buck2_gpiodvs) ? (1 << 1) : (0 << 1));
 854                 regmap_update_bits(s5m8767->iodev->regmap_pmic,
 855                                 S5M8767_REG_BUCK3CTRL, 1 << 1,
 856                                 (pdata->buck3_gpiodvs) ? (1 << 1) : (0 << 1));
 857                 regmap_update_bits(s5m8767->iodev->regmap_pmic,
 858                                 S5M8767_REG_BUCK4CTRL, 1 << 1,
 859                                 (pdata->buck4_gpiodvs) ? (1 << 1) : (0 << 1));
 860         }
 861
 862         /* Initialize GPIO DVS registers */
 863         for (i = 0; i < 8; i++) {
 864                 if (s5m8767->buck2_gpiodvs) {
 865                         regmap_write(s5m8767->iodev->regmap_pmic,
 866                                         S5M8767_REG_BUCK2DVS1 + i,
 867                                         s5m8767->buck2_vol[i]);
 868                 }
 869
 870                 if (s5m8767->buck3_gpiodvs) {
 871                         regmap_write(s5m8767->iodev->regmap_pmic,
 872                                         S5M8767_REG_BUCK3DVS1 + i,
 873                                         s5m8767->buck3_vol[i]);
 874                 }
 875
 876                 if (s5m8767->buck4_gpiodvs) {
 877                         regmap_write(s5m8767->iodev->regmap_pmic,
 878                                         S5M8767_REG_BUCK4DVS1 + i,
 879                                         s5m8767->buck4_vol[i]);
 880                 }
 881         }
 882
 883         if (s5m8767->buck2_ramp)
 884                 regmap_update_bits(s5m8767->iodev->regmap_pmic,
 885                                 S5M8767_REG_DVSRAMP, 0x08, 0x08);
 886
 887         if (s5m8767->buck3_ramp)
 888                 regmap_update_bits(s5m8767->iodev->regmap_pmic,
 889                                 S5M8767_REG_DVSRAMP, 0x04, 0x04);
 890
 891         if (s5m8767->buck4_ramp)
 892                 regmap_update_bits(s5m8767->iodev->regmap_pmic,
 893                                 S5M8767_REG_DVSRAMP, 0x02, 0x02);
 894
 895         if (s5m8767->buck2_ramp || s5m8767->buck3_ramp
 896                 || s5m8767->buck4_ramp) {
 897                 unsigned int val;
 898                 switch (s5m8767->ramp_delay) {
 899                 case 5:
 900                         val = S5M8767_DVS_BUCK_RAMP_5;
 901                         break;
 902                 case 10:
 903                         val = S5M8767_DVS_BUCK_RAMP_10;
 904                         break;
 905                 case 25:
 906                         val = S5M8767_DVS_BUCK_RAMP_25;
 907                         break;
 908                 case 50:
 909                         val = S5M8767_DVS_BUCK_RAMP_50;
 910                         break;
 911                 case 100:
 912                         val = S5M8767_DVS_BUCK_RAMP_100;
 913                         break;
 914                 default:
 915                         val = S5M8767_DVS_BUCK_RAMP_10;
 916                 }
 917                 regmap_update_bits(s5m8767->iodev->regmap_pmic,
 918                                         S5M8767_REG_DVSRAMP,
 919                                         S5M8767_DVS_BUCK_RAMP_MASK,
 920                                         val << S5M8767_DVS_BUCK_RAMP_SHIFT);
 921         }
 922
 923         for (i = 0; i < pdata->num_regulators; i++) {
 924                 const struct sec_voltage_desc *desc;
 925                 int id = pdata->regulators[i].id;
 926                 int enable_reg, enable_val;
 927                 struct regulator_dev *rdev;
 928
 929                 desc = reg_voltage_map[id];
 930                 if (desc) {
 931                         regulators[id].n_voltages =
 932                                 (desc->max - desc->min) / desc->step + 1;
 933                         regulators[id].min_uV = desc->min;
 934                         regulators[id].uV_step = desc->step;
 935                         regulators[id].vsel_reg =
 936                                 s5m8767_get_vsel_reg(id, s5m8767);
 937                         if (id < S5M8767_BUCK1)
 938                                 regulators[id].vsel_mask = 0x3f;
 939                         else
 940                                 regulators[id].vsel_mask = 0xff;
 941
 942                         ret = s5m8767_get_register(s5m8767, id, &enable_reg,
 943                                              &enable_val);
 944                         if (ret) {
 945                                 dev_err(s5m8767->dev, "error reading registers\n");
 946                                 return ret;
 947                         }
 948                         regulators[id].enable_reg = enable_reg;
 949                         regulators[id].enable_mask = S5M8767_ENCTRL_MASK;
 950                         regulators[id].enable_val = enable_val;
 951                 }
 952
 953                 config.dev = s5m8767->dev;
 954                 config.init_data = pdata->regulators[i].initdata;
 955                 config.driver_data = s5m8767;
 956                 config.regmap = iodev->regmap_pmic;
 957                 config.of_node = pdata->regulators[i].reg_node;
 958                 config.ena_gpiod = NULL;
 959                 if (pdata->regulators[i].ext_control_gpiod)
 960                         s5m8767_regulator_config_ext_control(s5m8767,
 961                                         &pdata->regulators[i], &config);
 962
 963                 rdev = devm_regulator_register(&pdev->dev, &regulators[id],
 964                                                   &config);
 965                 if (IS_ERR(rdev)) {
 966                         ret = PTR_ERR(rdev);
 967                         dev_err(s5m8767->dev, "regulator init failed for %d\n",
 968                                         id);
 969                         return ret;
 970                 }
 971
 972                 if (pdata->regulators[i].ext_control_gpiod) {
 973                         ret = s5m8767_enable_ext_control(s5m8767, rdev);
 974                         if (ret < 0) {
 975                                 dev_err(s5m8767->dev,
 976                                                 "failed to enable gpio control over %s: %d\n",
 977                                                 rdev->desc->name, ret);
 978                                 return ret;
 979                         }
 980                 }
 981         }
 982
 983         return 0;
 984 }
 985
 986 static const struct platform_device_id s5m8767_pmic_id[] = {
 987         { "s5m8767-pmic", 0},
 988         { },
 989 };
 990 MODULE_DEVICE_TABLE(platform, s5m8767_pmic_id);
 991
 992 static struct platform_driver s5m8767_pmic_driver = {
 993         .driver = {
 994                 .name = "s5m8767-pmic",
 995         },
 996         .probe = s5m8767_pmic_probe,
 997         .id_table = s5m8767_pmic_id,
 998 };
 999
1000 static int __init s5m8767_pmic_init(void)
1001 {
1002         return platform_driver_register(&s5m8767_pmic_driver);
1003 }
1004 subsys_initcall(s5m8767_pmic_init);
1005
1006 static void __exit s5m8767_pmic_exit(void)
1007 {
1008         platform_driver_unregister(&s5m8767_pmic_driver);
1009 }
1010 module_exit(s5m8767_pmic_exit);
1011
1012 /* Module information */
1013 MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
1014 MODULE_DESCRIPTION("SAMSUNG S5M8767 Regulator Driver");
1015 MODULE_LICENSE("GPL");