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/cleanup.h>
   7 #include <linux/err.h>
   8 #include <linux/of_gpio.h>
   9 #include <linux/gpio/consumer.h>
  10 #include <linux/module.h>
  11 #include <linux/platform_device.h>
  12 #include <linux/regulator/driver.h>
  13 #include <linux/regulator/machine.h>
  14 #include <linux/mfd/samsung/core.h>
  15 #include <linux/mfd/samsung/s5m8767.h>
  16 #include <linux/regulator/of_regulator.h>
  17 #include <linux/regmap.h>
  18
  19 #define S5M8767_OPMODE_NORMAL_MODE 0x1
  20
  21 struct s5m8767_info {
  22         struct device *dev;
  23         struct sec_pmic_dev *iodev;
  24         int num_regulators;
  25         struct sec_opmode_data *opmode;
  26
  27         int ramp_delay;
  28         bool buck2_ramp;
  29         bool buck3_ramp;
  30         bool buck4_ramp;
  31
  32         bool buck2_gpiodvs;
  33         bool buck3_gpiodvs;
  34         bool buck4_gpiodvs;
  35         u8 buck2_vol[8];
  36         u8 buck3_vol[8];
  37         u8 buck4_vol[8];
  38         int buck_gpios[3];
  39         int buck_ds[3];
  40         int buck_gpioindex;
  41 };
  42
  43 struct sec_voltage_desc {
  44         int max;
  45         int min;
  46         int step;
  47 };
  48
  49 static const struct sec_voltage_desc buck_voltage_val1 = {
  50         .max = 2225000,
  51         .min =  650000,
  52         .step =   6250,
  53 };
  54
  55 static const struct sec_voltage_desc buck_voltage_val2 = {
  56         .max = 1600000,
  57         .min =  600000,
  58         .step =   6250,
  59 };
  60
  61 static const struct sec_voltage_desc buck_voltage_val3 = {
  62         .max = 3000000,
  63         .min =  750000,
  64         .step =  12500,
  65 };
  66
  67 static const struct sec_voltage_desc ldo_voltage_val1 = {
  68         .max = 3950000,
  69         .min =  800000,
  70         .step =  50000,
  71 };
  72
  73 static const struct sec_voltage_desc ldo_voltage_val2 = {
  74         .max = 2375000,
  75         .min =  800000,
  76         .step =  25000,
  77 };
  78
  79 static const struct sec_voltage_desc *reg_voltage_map[] = {
  80         [S5M8767_LDO1] = &ldo_voltage_val2,
  81         [S5M8767_LDO2] = &ldo_voltage_val2,
  82         [S5M8767_LDO3] = &ldo_voltage_val1,
  83         [S5M8767_LDO4] = &ldo_voltage_val1,
  84         [S5M8767_LDO5] = &ldo_voltage_val1,
  85         [S5M8767_LDO6] = &ldo_voltage_val2,
  86         [S5M8767_LDO7] = &ldo_voltage_val2,
  87         [S5M8767_LDO8] = &ldo_voltage_val2,
  88         [S5M8767_LDO9] = &ldo_voltage_val1,
  89         [S5M8767_LDO10] = &ldo_voltage_val1,
  90         [S5M8767_LDO11] = &ldo_voltage_val1,
  91         [S5M8767_LDO12] = &ldo_voltage_val1,
  92         [S5M8767_LDO13] = &ldo_voltage_val1,
  93         [S5M8767_LDO14] = &ldo_voltage_val1,
  94         [S5M8767_LDO15] = &ldo_voltage_val2,
  95         [S5M8767_LDO16] = &ldo_voltage_val1,
  96         [S5M8767_LDO17] = &ldo_voltage_val1,
  97         [S5M8767_LDO18] = &ldo_voltage_val1,
  98         [S5M8767_LDO19] = &ldo_voltage_val1,
  99         [S5M8767_LDO20] = &ldo_voltage_val1,
 100         [S5M8767_LDO21] = &ldo_voltage_val1,
 101         [S5M8767_LDO22] = &ldo_voltage_val1,
 102         [S5M8767_LDO23] = &ldo_voltage_val1,
 103         [S5M8767_LDO24] = &ldo_voltage_val1,
 104         [S5M8767_LDO25] = &ldo_voltage_val1,
 105         [S5M8767_LDO26] = &ldo_voltage_val1,
 106         [S5M8767_LDO27] = &ldo_voltage_val1,
 107         [S5M8767_LDO28] = &ldo_voltage_val1,
 108         [S5M8767_BUCK1] = &buck_voltage_val1,
 109         [S5M8767_BUCK2] = &buck_voltage_val2,
 110         [S5M8767_BUCK3] = &buck_voltage_val2,
 111         [S5M8767_BUCK4] = &buck_voltage_val2,
 112         [S5M8767_BUCK5] = &buck_voltage_val1,
 113         [S5M8767_BUCK6] = &buck_voltage_val1,
 114         [S5M8767_BUCK7] = &buck_voltage_val3,
 115         [S5M8767_BUCK8] = &buck_voltage_val3,
 116         [S5M8767_BUCK9] = &buck_voltage_val3,
 117 };
 118
 119 static const unsigned int s5m8767_opmode_reg[][4] = {
 120         /* {OFF, ON, LOWPOWER, SUSPEND} */
 121         /* LDO1 ... LDO28 */
 122         {0x0, 0x3, 0x2, 0x1}, /* LDO1 */
 123         {0x0, 0x3, 0x2, 0x1},
 124         {0x0, 0x3, 0x2, 0x1},
 125         {0x0, 0x0, 0x0, 0x0},
 126         {0x0, 0x3, 0x2, 0x1}, /* LDO5 */
 127         {0x0, 0x3, 0x2, 0x1},
 128         {0x0, 0x3, 0x2, 0x1},
 129         {0x0, 0x3, 0x2, 0x1},
 130         {0x0, 0x3, 0x2, 0x1},
 131         {0x0, 0x3, 0x2, 0x1}, /* LDO10 */
 132         {0x0, 0x3, 0x2, 0x1},
 133         {0x0, 0x3, 0x2, 0x1},
 134         {0x0, 0x3, 0x2, 0x1},
 135         {0x0, 0x3, 0x2, 0x1},
 136         {0x0, 0x3, 0x2, 0x1}, /* LDO15 */
 137         {0x0, 0x3, 0x2, 0x1},
 138         {0x0, 0x3, 0x2, 0x1},
 139         {0x0, 0x0, 0x0, 0x0},
 140         {0x0, 0x3, 0x2, 0x1},
 141         {0x0, 0x3, 0x2, 0x1}, /* LDO20 */
 142         {0x0, 0x3, 0x2, 0x1},
 143         {0x0, 0x3, 0x2, 0x1},
 144         {0x0, 0x0, 0x0, 0x0},
 145         {0x0, 0x3, 0x2, 0x1},
 146         {0x0, 0x3, 0x2, 0x1}, /* LDO25 */
 147         {0x0, 0x3, 0x2, 0x1},
 148         {0x0, 0x3, 0x2, 0x1},
 149         {0x0, 0x3, 0x2, 0x1}, /* LDO28 */
 150
 151         /* BUCK1 ... BUCK9 */
 152         {0x0, 0x3, 0x1, 0x1}, /* BUCK1 */
 153         {0x0, 0x3, 0x1, 0x1},
 154         {0x0, 0x3, 0x1, 0x1},
 155         {0x0, 0x3, 0x1, 0x1},
 156         {0x0, 0x3, 0x2, 0x1}, /* BUCK5 */
 157         {0x0, 0x3, 0x1, 0x1},
 158         {0x0, 0x3, 0x1, 0x1},
 159         {0x0, 0x3, 0x1, 0x1},
 160         {0x0, 0x3, 0x1, 0x1}, /* BUCK9 */
 161 };
 162
 163 static int s5m8767_get_register(struct s5m8767_info *s5m8767, int reg_id,
 164                                 int *reg, int *enable_ctrl)
 165 {
 166         int i;
 167         unsigned int mode;
 168
 169         switch (reg_id) {
 170         case S5M8767_LDO1 ... S5M8767_LDO2:
 171                 *reg = S5M8767_REG_LDO1CTRL + (reg_id - S5M8767_LDO1);
 172                 break;
 173         case S5M8767_LDO3 ... S5M8767_LDO28:
 174                 *reg = S5M8767_REG_LDO3CTRL + (reg_id - S5M8767_LDO3);
 175                 break;
 176         case S5M8767_BUCK1:
 177                 *reg = S5M8767_REG_BUCK1CTRL1;
 178                 break;
 179         case S5M8767_BUCK2 ... S5M8767_BUCK4:
 180                 *reg = S5M8767_REG_BUCK2CTRL + (reg_id - S5M8767_BUCK2) * 9;
 181                 break;
 182         case S5M8767_BUCK5:
 183                 *reg = S5M8767_REG_BUCK5CTRL1;
 184                 break;
 185         case S5M8767_BUCK6 ... S5M8767_BUCK9:
 186                 *reg = S5M8767_REG_BUCK6CTRL1 + (reg_id - S5M8767_BUCK6) * 2;
 187                 break;
 188         default:
 189                 return -EINVAL;
 190         }
 191
 192         for (i = 0; i < s5m8767->num_regulators; i++) {
 193                 if (s5m8767->opmode[i].id == reg_id) {
 194                         mode = s5m8767->opmode[i].mode;
 195                         break;
 196                 }
 197         }
 198
 199         if (i >= s5m8767->num_regulators)
 200                 return -EINVAL;
 201
 202         *enable_ctrl = s5m8767_opmode_reg[reg_id][mode] << S5M8767_ENCTRL_SHIFT;
 203
 204         return 0;
 205 }
 206
 207 static int s5m8767_get_vsel_reg(int reg_id, struct s5m8767_info *s5m8767)
 208 {
 209         int reg;
 210
 211         switch (reg_id) {
 212         case S5M8767_LDO1 ... S5M8767_LDO2:
 213                 reg = S5M8767_REG_LDO1CTRL + (reg_id - S5M8767_LDO1);
 214                 break;
 215         case S5M8767_LDO3 ... S5M8767_LDO28:
 216                 reg = S5M8767_REG_LDO3CTRL + (reg_id - S5M8767_LDO3);
 217                 break;
 218         case S5M8767_BUCK1:
 219                 reg = S5M8767_REG_BUCK1CTRL2;
 220                 break;
 221         case S5M8767_BUCK2:
 222                 reg = S5M8767_REG_BUCK2DVS1;
 223                 if (s5m8767->buck2_gpiodvs)
 224                         reg += s5m8767->buck_gpioindex;
 225                 break;
 226         case S5M8767_BUCK3:
 227                 reg = S5M8767_REG_BUCK3DVS1;
 228                 if (s5m8767->buck3_gpiodvs)
 229                         reg += s5m8767->buck_gpioindex;
 230                 break;
 231         case S5M8767_BUCK4:
 232                 reg = S5M8767_REG_BUCK4DVS1;
 233                 if (s5m8767->buck4_gpiodvs)
 234                         reg += s5m8767->buck_gpioindex;
 235                 break;
 236         case S5M8767_BUCK5:
 237                 reg = S5M8767_REG_BUCK5CTRL2;
 238                 break;
 239         case S5M8767_BUCK6 ... S5M8767_BUCK9:
 240                 reg = S5M8767_REG_BUCK6CTRL2 + (reg_id - S5M8767_BUCK6) * 2;
 241                 break;
 242         default:
 243                 return -EINVAL;
 244         }
 245
 246         return reg;
 247 }
 248
 249 static int s5m8767_convert_voltage_to_sel(const struct sec_voltage_desc *desc,
 250                                           int min_vol)
 251 {
 252         int selector = 0;
 253
 254         if (desc == NULL)
 255                 return -EINVAL;
 256
 257         if (min_vol > desc->max)
 258                 return -EINVAL;
 259
 260         if (min_vol < desc->min)
 261                 min_vol = desc->min;
 262
 263         selector = DIV_ROUND_UP(min_vol - desc->min, desc->step);
 264
 265         if (desc->min + desc->step * selector > desc->max)
 266                 return -EINVAL;
 267
 268         return selector;
 269 }
 270
 271 static inline int s5m8767_set_high(struct s5m8767_info *s5m8767)
 272 {
 273         int temp_index = s5m8767->buck_gpioindex;
 274
 275         gpio_set_value(s5m8767->buck_gpios[0], (temp_index >> 2) & 0x1);
 276         gpio_set_value(s5m8767->buck_gpios[1], (temp_index >> 1) & 0x1);
 277         gpio_set_value(s5m8767->buck_gpios[2], temp_index & 0x1);
 278
 279         return 0;
 280 }
 281
 282 static inline int s5m8767_set_low(struct s5m8767_info *s5m8767)
 283 {
 284         int temp_index = s5m8767->buck_gpioindex;
 285
 286         gpio_set_value(s5m8767->buck_gpios[2], temp_index & 0x1);
 287         gpio_set_value(s5m8767->buck_gpios[1], (temp_index >> 1) & 0x1);
 288         gpio_set_value(s5m8767->buck_gpios[0], (temp_index >> 2) & 0x1);
 289
 290         return 0;
 291 }
 292
 293 static int s5m8767_set_voltage_sel(struct regulator_dev *rdev,
 294                                    unsigned selector)
 295 {
 296         struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
 297         int reg_id = rdev_get_id(rdev);
 298         int old_index, index = 0;
 299         u8 *buck234_vol = NULL;
 300
 301         switch (reg_id) {
 302         case S5M8767_LDO1 ... S5M8767_LDO28:
 303                 break;
 304         case S5M8767_BUCK1 ... S5M8767_BUCK6:
 305                 if (reg_id == S5M8767_BUCK2 && s5m8767->buck2_gpiodvs)
 306                         buck234_vol = &s5m8767->buck2_vol[0];
 307                 else if (reg_id == S5M8767_BUCK3 && s5m8767->buck3_gpiodvs)
 308                         buck234_vol = &s5m8767->buck3_vol[0];
 309                 else if (reg_id == S5M8767_BUCK4 && s5m8767->buck4_gpiodvs)
 310                         buck234_vol = &s5m8767->buck4_vol[0];
 311                 break;
 312         case S5M8767_BUCK7 ... S5M8767_BUCK8:
 313                 return -EINVAL;
 314         case S5M8767_BUCK9:
 315                 break;
 316         default:
 317                 return -EINVAL;
 318         }
 319
 320         /* buck234_vol != NULL means to control buck234 voltage via DVS GPIO */
 321         if (buck234_vol) {
 322                 while (*buck234_vol != selector) {
 323                         buck234_vol++;
 324                         index++;
 325                 }
 326                 old_index = s5m8767->buck_gpioindex;
 327                 s5m8767->buck_gpioindex = index;
 328
 329                 if (index > old_index)
 330                         return s5m8767_set_high(s5m8767);
 331                 else
 332                         return s5m8767_set_low(s5m8767);
 333         } else {
 334                 return regulator_set_voltage_sel_regmap(rdev, selector);
 335         }
 336 }
 337
 338 static int s5m8767_set_voltage_time_sel(struct regulator_dev *rdev,
 339                                              unsigned int old_sel,
 340                                              unsigned int new_sel)
 341 {
 342         struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
 343
 344         if ((old_sel < new_sel) && s5m8767->ramp_delay)
 345                 return DIV_ROUND_UP(rdev->desc->uV_step * (new_sel - old_sel),
 346                                         s5m8767->ramp_delay * 1000);
 347         return 0;
 348 }
 349
 350 static const struct regulator_ops s5m8767_ops = {
 351         .list_voltage           = regulator_list_voltage_linear,
 352         .is_enabled             = regulator_is_enabled_regmap,
 353         .enable                 = regulator_enable_regmap,
 354         .disable                = regulator_disable_regmap,
 355         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 356         .set_voltage_sel        = s5m8767_set_voltage_sel,
 357         .set_voltage_time_sel   = s5m8767_set_voltage_time_sel,
 358 };
 359
 360 static const struct regulator_ops s5m8767_buck78_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        = regulator_set_voltage_sel_regmap,
 367 };
 368
 369 #define s5m8767_regulator_desc(_name) {         \
 370         .name           = #_name,               \
 371         .id             = S5M8767_##_name,      \
 372         .ops            = &s5m8767_ops,         \
 373         .type           = REGULATOR_VOLTAGE,    \
 374         .owner          = THIS_MODULE,          \
 375 }
 376
 377 #define s5m8767_regulator_buck78_desc(_name) {  \
 378         .name           = #_name,               \
 379         .id             = S5M8767_##_name,      \
 380         .ops            = &s5m8767_buck78_ops,  \
 381         .type           = REGULATOR_VOLTAGE,    \
 382         .owner          = THIS_MODULE,          \
 383 }
 384
 385 static struct regulator_desc regulators[] = {
 386         s5m8767_regulator_desc(LDO1),
 387         s5m8767_regulator_desc(LDO2),
 388         s5m8767_regulator_desc(LDO3),
 389         s5m8767_regulator_desc(LDO4),
 390         s5m8767_regulator_desc(LDO5),
 391         s5m8767_regulator_desc(LDO6),
 392         s5m8767_regulator_desc(LDO7),
 393         s5m8767_regulator_desc(LDO8),
 394         s5m8767_regulator_desc(LDO9),
 395         s5m8767_regulator_desc(LDO10),
 396         s5m8767_regulator_desc(LDO11),
 397         s5m8767_regulator_desc(LDO12),
 398         s5m8767_regulator_desc(LDO13),
 399         s5m8767_regulator_desc(LDO14),
 400         s5m8767_regulator_desc(LDO15),
 401         s5m8767_regulator_desc(LDO16),
 402         s5m8767_regulator_desc(LDO17),
 403         s5m8767_regulator_desc(LDO18),
 404         s5m8767_regulator_desc(LDO19),
 405         s5m8767_regulator_desc(LDO20),
 406         s5m8767_regulator_desc(LDO21),
 407         s5m8767_regulator_desc(LDO22),
 408         s5m8767_regulator_desc(LDO23),
 409         s5m8767_regulator_desc(LDO24),
 410         s5m8767_regulator_desc(LDO25),
 411         s5m8767_regulator_desc(LDO26),
 412         s5m8767_regulator_desc(LDO27),
 413         s5m8767_regulator_desc(LDO28),
 414         s5m8767_regulator_desc(BUCK1),
 415         s5m8767_regulator_desc(BUCK2),
 416         s5m8767_regulator_desc(BUCK3),
 417         s5m8767_regulator_desc(BUCK4),
 418         s5m8767_regulator_desc(BUCK5),
 419         s5m8767_regulator_desc(BUCK6),
 420         s5m8767_regulator_buck78_desc(BUCK7),
 421         s5m8767_regulator_buck78_desc(BUCK8),
 422         s5m8767_regulator_desc(BUCK9),
 423 };
 424
 425 /*
 426  * Enable GPIO control over BUCK9 in regulator_config for that regulator.
 427  */
 428 static void s5m8767_regulator_config_ext_control(struct s5m8767_info *s5m8767,
 429                 struct sec_regulator_data *rdata,
 430                 struct regulator_config *config)
 431 {
 432         int i, mode = 0;
 433
 434         if (rdata->id != S5M8767_BUCK9)
 435                 return;
 436
 437         /* Check if opmode for regulator matches S5M8767_ENCTRL_USE_GPIO */
 438         for (i = 0; i < s5m8767->num_regulators; i++) {
 439                 const struct sec_opmode_data *opmode = &s5m8767->opmode[i];
 440                 if (opmode->id == rdata->id) {
 441                         mode = s5m8767_opmode_reg[rdata->id][opmode->mode];
 442                         break;
 443                 }
 444         }
 445         if (mode != S5M8767_ENCTRL_USE_GPIO) {
 446                 dev_warn(s5m8767->dev,
 447                                 "ext-control for %pOFn: mismatched op_mode (%x), ignoring\n",
 448                                 rdata->reg_node, mode);
 449                 return;
 450         }
 451
 452         if (!rdata->ext_control_gpiod) {
 453                 dev_warn(s5m8767->dev,
 454                                 "ext-control for %pOFn: GPIO not valid, ignoring\n",
 455                          rdata->reg_node);
 456                 return;
 457         }
 458
 459         config->ena_gpiod = rdata->ext_control_gpiod;
 460 }
 461
 462 /*
 463  * Turn on GPIO control over BUCK9.
 464  */
 465 static int s5m8767_enable_ext_control(struct s5m8767_info *s5m8767,
 466                 struct regulator_dev *rdev)
 467 {
 468         int id = rdev_get_id(rdev);
 469         int ret, reg, enable_ctrl;
 470
 471         if (id != S5M8767_BUCK9)
 472                 return -EINVAL;
 473
 474         ret = s5m8767_get_register(s5m8767, id, &reg, &enable_ctrl);
 475         if (ret)
 476                 return ret;
 477
 478         return regmap_update_bits(s5m8767->iodev->regmap_pmic,
 479                         reg, S5M8767_ENCTRL_MASK,
 480                         S5M8767_ENCTRL_USE_GPIO << S5M8767_ENCTRL_SHIFT);
 481 }
 482
 483
 484 #ifdef CONFIG_OF
 485 static int s5m8767_pmic_dt_parse_dvs_gpio(struct sec_pmic_dev *iodev,
 486                         struct sec_platform_data *pdata,
 487                         struct device_node *pmic_np)
 488 {
 489         int i, gpio;
 490
 491         for (i = 0; i < 3; i++) {
 492                 gpio = of_get_named_gpio(pmic_np,
 493                                         "s5m8767,pmic-buck-dvs-gpios", i);
 494                 if (!gpio_is_valid(gpio)) {
 495                         dev_err(iodev->dev, "invalid gpio[%d]: %d\n", i, gpio);
 496                         return -EINVAL;
 497                 }
 498                 pdata->buck_gpios[i] = gpio;
 499         }
 500         return 0;
 501 }
 502
 503 static int s5m8767_pmic_dt_parse_ds_gpio(struct sec_pmic_dev *iodev,
 504                         struct sec_platform_data *pdata,
 505                         struct device_node *pmic_np)
 506 {
 507         int i, gpio;
 508
 509         for (i = 0; i < 3; i++) {
 510                 gpio = of_get_named_gpio(pmic_np,
 511                                         "s5m8767,pmic-buck-ds-gpios", i);
 512                 if (!gpio_is_valid(gpio)) {
 513                         dev_err(iodev->dev, "invalid gpio[%d]: %d\n", i, gpio);
 514                         return -EINVAL;
 515                 }
 516                 pdata->buck_ds[i] = gpio;
 517         }
 518         return 0;
 519 }
 520
 521 static int s5m8767_pmic_dt_parse_pdata(struct platform_device *pdev,
 522                                         struct sec_platform_data *pdata)
 523 {
 524         struct sec_pmic_dev *iodev = dev_get_drvdata(pdev->dev.parent);
 525         struct device_node *pmic_np, *reg_np;
 526         struct sec_regulator_data *rdata;
 527         struct sec_opmode_data *rmode;
 528         unsigned int i, dvs_voltage_nr = 8, ret;
 529
 530         pmic_np = iodev->dev->of_node;
 531         if (!pmic_np) {
 532                 dev_err(iodev->dev, "could not find pmic sub-node\n");
 533                 return -ENODEV;
 534         }
 535
 536         struct device_node *regulators_np __free(device_node) = of_get_child_by_name(pmic_np,
 537                                                                                      "regulators");
 538         if (!regulators_np) {
 539                 dev_err(iodev->dev, "could not find regulators sub-node\n");
 540                 return -EINVAL;
 541         }
 542
 543         /* count the number of regulators to be supported in pmic */
 544         pdata->num_regulators = of_get_child_count(regulators_np);
 545
 546         rdata = devm_kcalloc(&pdev->dev,
 547                              pdata->num_regulators, sizeof(*rdata),
 548                              GFP_KERNEL);
 549         if (!rdata)
 550                 return -ENOMEM;
 551
 552         rmode = devm_kcalloc(&pdev->dev,
 553                              pdata->num_regulators, sizeof(*rmode),
 554                              GFP_KERNEL);
 555         if (!rmode)
 556                 return -ENOMEM;
 557
 558         pdata->regulators = rdata;
 559         pdata->opmode = rmode;
 560         for_each_child_of_node(regulators_np, reg_np) {
 561                 for (i = 0; i < ARRAY_SIZE(regulators); i++)
 562                         if (of_node_name_eq(reg_np, regulators[i].name))
 563                                 break;
 564
 565                 if (i == ARRAY_SIZE(regulators)) {
 566                         dev_warn(iodev->dev,
 567                         "don't know how to configure regulator %pOFn\n",
 568                         reg_np);
 569                         continue;
 570                 }
 571
 572                 rdata->ext_control_gpiod = devm_fwnode_gpiod_get(
 573                         &pdev->dev,
 574                         of_fwnode_handle(reg_np),
 575                         "s5m8767,pmic-ext-control",
 576                         GPIOD_OUT_HIGH | GPIOD_FLAGS_BIT_NONEXCLUSIVE,
 577                         "s5m8767");
 578                 if (PTR_ERR(rdata->ext_control_gpiod) == -ENOENT) {
 579                         rdata->ext_control_gpiod = NULL;
 580                 } else if (IS_ERR(rdata->ext_control_gpiod)) {
 581                         of_node_put(reg_np);
 582                         return PTR_ERR(rdata->ext_control_gpiod);
 583                 }
 584
 585                 rdata->id = i;
 586                 rdata->initdata = of_get_regulator_init_data(
 587                                                 &pdev->dev, reg_np,
 588                                                 &regulators[i]);
 589                 rdata->reg_node = reg_np;
 590                 rdata++;
 591                 rmode->id = i;
 592                 if (of_property_read_u32(reg_np, "op_mode",
 593                                 &rmode->mode)) {
 594                         dev_warn(iodev->dev,
 595                                 "no op_mode property at %pOF\n",
 596                                 reg_np);
 597
 598                         rmode->mode = S5M8767_OPMODE_NORMAL_MODE;
 599                 }
 600                 rmode++;
 601         }
 602
 603         if (of_property_read_bool(pmic_np, "s5m8767,pmic-buck2-uses-gpio-dvs")) {
 604                 pdata->buck2_gpiodvs = true;
 605
 606                 if (of_property_read_u32_array(pmic_np,
 607                                 "s5m8767,pmic-buck2-dvs-voltage",
 608                                 pdata->buck2_voltage, dvs_voltage_nr)) {
 609                         dev_err(iodev->dev, "buck2 voltages not specified\n");
 610                         return -EINVAL;
 611                 }
 612         }
 613
 614         if (of_property_read_bool(pmic_np, "s5m8767,pmic-buck3-uses-gpio-dvs")) {
 615                 pdata->buck3_gpiodvs = true;
 616
 617                 if (of_property_read_u32_array(pmic_np,
 618                                 "s5m8767,pmic-buck3-dvs-voltage",
 619                                 pdata->buck3_voltage, dvs_voltage_nr)) {
 620                         dev_err(iodev->dev, "buck3 voltages not specified\n");
 621                         return -EINVAL;
 622                 }
 623         }
 624
 625         if (of_property_read_bool(pmic_np, "s5m8767,pmic-buck4-uses-gpio-dvs")) {
 626                 pdata->buck4_gpiodvs = true;
 627
 628                 if (of_property_read_u32_array(pmic_np,
 629                                 "s5m8767,pmic-buck4-dvs-voltage",
 630                                 pdata->buck4_voltage, dvs_voltage_nr)) {
 631                         dev_err(iodev->dev, "buck4 voltages not specified\n");
 632                         return -EINVAL;
 633                 }
 634         }
 635
 636         if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs ||
 637                                                 pdata->buck4_gpiodvs) {
 638                 ret = s5m8767_pmic_dt_parse_dvs_gpio(iodev, pdata, pmic_np);
 639                 if (ret)
 640                         return -EINVAL;
 641
 642                 if (of_property_read_u32(pmic_np,
 643                                 "s5m8767,pmic-buck-default-dvs-idx",
 644                                 &pdata->buck_default_idx)) {
 645                         pdata->buck_default_idx = 0;
 646                 } else {
 647                         if (pdata->buck_default_idx >= 8) {
 648                                 pdata->buck_default_idx = 0;
 649                                 dev_info(iodev->dev,
 650                                 "invalid value for default dvs index, use 0\n");
 651                         }
 652                 }
 653         }
 654
 655         ret = s5m8767_pmic_dt_parse_ds_gpio(iodev, pdata, pmic_np);
 656         if (ret)
 657                 return -EINVAL;
 658
 659         pdata->buck2_ramp_enable = of_property_read_bool(pmic_np, "s5m8767,pmic-buck2-ramp-enable");
 660         pdata->buck3_ramp_enable = of_property_read_bool(pmic_np, "s5m8767,pmic-buck3-ramp-enable");
 661         pdata->buck4_ramp_enable = of_property_read_bool(pmic_np, "s5m8767,pmic-buck4-ramp-enable");
 662
 663         if (pdata->buck2_ramp_enable || pdata->buck3_ramp_enable
 664                         || pdata->buck4_ramp_enable) {
 665                 if (of_property_read_u32(pmic_np, "s5m8767,pmic-buck-ramp-delay",
 666                                 &pdata->buck_ramp_delay))
 667                         pdata->buck_ramp_delay = 0;
 668         }
 669
 670         return 0;
 671 }
 672 #else
 673 static int s5m8767_pmic_dt_parse_pdata(struct platform_device *pdev,
 674                                         struct sec_platform_data *pdata)
 675 {
 676         return 0;
 677 }
 678 #endif /* CONFIG_OF */
 679
 680 static int s5m8767_pmic_probe(struct platform_device *pdev)
 681 {
 682         struct sec_pmic_dev *iodev = dev_get_drvdata(pdev->dev.parent);
 683         struct sec_platform_data *pdata = iodev->pdata;
 684         struct regulator_config config = { };
 685         struct s5m8767_info *s5m8767;
 686         int i, ret, buck_init;
 687
 688         if (!pdata) {
 689                 dev_err(pdev->dev.parent, "Platform data not supplied\n");
 690                 return -ENODEV;
 691         }
 692
 693         if (iodev->dev->of_node) {
 694                 ret = s5m8767_pmic_dt_parse_pdata(pdev, pdata);
 695                 if (ret)
 696                         return ret;
 697         }
 698
 699         if (pdata->buck2_gpiodvs) {
 700                 if (pdata->buck3_gpiodvs || pdata->buck4_gpiodvs) {
 701                         dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n");
 702                         return -EINVAL;
 703                 }
 704         }
 705
 706         if (pdata->buck3_gpiodvs) {
 707                 if (pdata->buck2_gpiodvs || pdata->buck4_gpiodvs) {
 708                         dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n");
 709                         return -EINVAL;
 710                 }
 711         }
 712
 713         if (pdata->buck4_gpiodvs) {
 714                 if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs) {
 715                         dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n");
 716                         return -EINVAL;
 717                 }
 718         }
 719
 720         s5m8767 = devm_kzalloc(&pdev->dev, sizeof(struct s5m8767_info),
 721                                 GFP_KERNEL);
 722         if (!s5m8767)
 723                 return -ENOMEM;
 724
 725         s5m8767->dev = &pdev->dev;
 726         s5m8767->iodev = iodev;
 727         s5m8767->num_regulators = pdata->num_regulators;
 728         platform_set_drvdata(pdev, s5m8767);
 729
 730         s5m8767->buck_gpioindex = pdata->buck_default_idx;
 731         s5m8767->buck2_gpiodvs = pdata->buck2_gpiodvs;
 732         s5m8767->buck3_gpiodvs = pdata->buck3_gpiodvs;
 733         s5m8767->buck4_gpiodvs = pdata->buck4_gpiodvs;
 734         s5m8767->buck_gpios[0] = pdata->buck_gpios[0];
 735         s5m8767->buck_gpios[1] = pdata->buck_gpios[1];
 736         s5m8767->buck_gpios[2] = pdata->buck_gpios[2];
 737         s5m8767->buck_ds[0] = pdata->buck_ds[0];
 738         s5m8767->buck_ds[1] = pdata->buck_ds[1];
 739         s5m8767->buck_ds[2] = pdata->buck_ds[2];
 740
 741         s5m8767->ramp_delay = pdata->buck_ramp_delay;
 742         s5m8767->buck2_ramp = pdata->buck2_ramp_enable;
 743         s5m8767->buck3_ramp = pdata->buck3_ramp_enable;
 744         s5m8767->buck4_ramp = pdata->buck4_ramp_enable;
 745         s5m8767->opmode = pdata->opmode;
 746
 747         buck_init = s5m8767_convert_voltage_to_sel(&buck_voltage_val2,
 748                                                    pdata->buck2_init);
 749
 750         regmap_write(s5m8767->iodev->regmap_pmic, S5M8767_REG_BUCK2DVS2,
 751                         buck_init);
 752
 753         buck_init = s5m8767_convert_voltage_to_sel(&buck_voltage_val2,
 754                                                    pdata->buck3_init);
 755
 756         regmap_write(s5m8767->iodev->regmap_pmic, S5M8767_REG_BUCK3DVS2,
 757                         buck_init);
 758
 759         buck_init = s5m8767_convert_voltage_to_sel(&buck_voltage_val2,
 760                                                    pdata->buck4_init);
 761
 762         regmap_write(s5m8767->iodev->regmap_pmic, S5M8767_REG_BUCK4DVS2,
 763                         buck_init);
 764
 765         for (i = 0; i < 8; i++) {
 766                 if (s5m8767->buck2_gpiodvs) {
 767                         s5m8767->buck2_vol[i] =
 768                                 s5m8767_convert_voltage_to_sel(
 769                                                 &buck_voltage_val2,
 770                                                 pdata->buck2_voltage[i]);
 771                 }
 772
 773                 if (s5m8767->buck3_gpiodvs) {
 774                         s5m8767->buck3_vol[i] =
 775                                 s5m8767_convert_voltage_to_sel(
 776                                                 &buck_voltage_val2,
 777                                                 pdata->buck3_voltage[i]);
 778                 }
 779
 780                 if (s5m8767->buck4_gpiodvs) {
 781                         s5m8767->buck4_vol[i] =
 782                                 s5m8767_convert_voltage_to_sel(
 783                                                 &buck_voltage_val2,
 784                                                 pdata->buck4_voltage[i]);
 785                 }
 786         }
 787
 788         if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs ||
 789                                                 pdata->buck4_gpiodvs) {
 790
 791                 if (!gpio_is_valid(pdata->buck_gpios[0]) ||
 792                         !gpio_is_valid(pdata->buck_gpios[1]) ||
 793                         !gpio_is_valid(pdata->buck_gpios[2])) {
 794                         dev_err(&pdev->dev, "GPIO NOT VALID\n");
 795                         return -EINVAL;
 796                 }
 797
 798                 ret = devm_gpio_request(&pdev->dev, pdata->buck_gpios[0],
 799                                         "S5M8767 SET1");
 800                 if (ret)
 801                         return ret;
 802
 803                 ret = devm_gpio_request(&pdev->dev, pdata->buck_gpios[1],
 804                                         "S5M8767 SET2");
 805                 if (ret)
 806                         return ret;
 807
 808                 ret = devm_gpio_request(&pdev->dev, pdata->buck_gpios[2],
 809                                         "S5M8767 SET3");
 810                 if (ret)
 811                         return ret;
 812
 813                 /* SET1 GPIO */
 814                 gpio_direction_output(pdata->buck_gpios[0],
 815                                 (s5m8767->buck_gpioindex >> 2) & 0x1);
 816                 /* SET2 GPIO */
 817                 gpio_direction_output(pdata->buck_gpios[1],
 818                                 (s5m8767->buck_gpioindex >> 1) & 0x1);
 819                 /* SET3 GPIO */
 820                 gpio_direction_output(pdata->buck_gpios[2],
 821                                 (s5m8767->buck_gpioindex >> 0) & 0x1);
 822         }
 823
 824         ret = devm_gpio_request(&pdev->dev, pdata->buck_ds[0], "S5M8767 DS2");
 825         if (ret)
 826                 return ret;
 827
 828         ret = devm_gpio_request(&pdev->dev, pdata->buck_ds[1], "S5M8767 DS3");
 829         if (ret)
 830                 return ret;
 831
 832         ret = devm_gpio_request(&pdev->dev, pdata->buck_ds[2], "S5M8767 DS4");
 833         if (ret)
 834                 return ret;
 835
 836         /* DS2 GPIO */
 837         gpio_direction_output(pdata->buck_ds[0], 0x0);
 838         /* DS3 GPIO */
 839         gpio_direction_output(pdata->buck_ds[1], 0x0);
 840         /* DS4 GPIO */
 841         gpio_direction_output(pdata->buck_ds[2], 0x0);
 842
 843         regmap_update_bits(s5m8767->iodev->regmap_pmic,
 844                            S5M8767_REG_BUCK2CTRL, 1 << 1,
 845                            (pdata->buck2_gpiodvs) ? (1 << 1) : (0 << 1));
 846         regmap_update_bits(s5m8767->iodev->regmap_pmic,
 847                            S5M8767_REG_BUCK3CTRL, 1 << 1,
 848                            (pdata->buck3_gpiodvs) ? (1 << 1) : (0 << 1));
 849         regmap_update_bits(s5m8767->iodev->regmap_pmic,
 850                            S5M8767_REG_BUCK4CTRL, 1 << 1,
 851                            (pdata->buck4_gpiodvs) ? (1 << 1) : (0 << 1));
 852
 853         /* Initialize GPIO DVS registers */
 854         for (i = 0; i < 8; i++) {
 855                 if (s5m8767->buck2_gpiodvs) {
 856                         regmap_write(s5m8767->iodev->regmap_pmic,
 857                                         S5M8767_REG_BUCK2DVS1 + i,
 858                                         s5m8767->buck2_vol[i]);
 859                 }
 860
 861                 if (s5m8767->buck3_gpiodvs) {
 862                         regmap_write(s5m8767->iodev->regmap_pmic,
 863                                         S5M8767_REG_BUCK3DVS1 + i,
 864                                         s5m8767->buck3_vol[i]);
 865                 }
 866
 867                 if (s5m8767->buck4_gpiodvs) {
 868                         regmap_write(s5m8767->iodev->regmap_pmic,
 869                                         S5M8767_REG_BUCK4DVS1 + i,
 870                                         s5m8767->buck4_vol[i]);
 871                 }
 872         }
 873
 874         if (s5m8767->buck2_ramp)
 875                 regmap_update_bits(s5m8767->iodev->regmap_pmic,
 876                                 S5M8767_REG_DVSRAMP, 0x08, 0x08);
 877
 878         if (s5m8767->buck3_ramp)
 879                 regmap_update_bits(s5m8767->iodev->regmap_pmic,
 880                                 S5M8767_REG_DVSRAMP, 0x04, 0x04);
 881
 882         if (s5m8767->buck4_ramp)
 883                 regmap_update_bits(s5m8767->iodev->regmap_pmic,
 884                                 S5M8767_REG_DVSRAMP, 0x02, 0x02);
 885
 886         if (s5m8767->buck2_ramp || s5m8767->buck3_ramp
 887                 || s5m8767->buck4_ramp) {
 888                 unsigned int val;
 889                 switch (s5m8767->ramp_delay) {
 890                 case 5:
 891                         val = S5M8767_DVS_BUCK_RAMP_5;
 892                         break;
 893                 case 10:
 894                         val = S5M8767_DVS_BUCK_RAMP_10;
 895                         break;
 896                 case 25:
 897                         val = S5M8767_DVS_BUCK_RAMP_25;
 898                         break;
 899                 case 50:
 900                         val = S5M8767_DVS_BUCK_RAMP_50;
 901                         break;
 902                 case 100:
 903                         val = S5M8767_DVS_BUCK_RAMP_100;
 904                         break;
 905                 default:
 906                         val = S5M8767_DVS_BUCK_RAMP_10;
 907                 }
 908                 regmap_update_bits(s5m8767->iodev->regmap_pmic,
 909                                         S5M8767_REG_DVSRAMP,
 910                                         S5M8767_DVS_BUCK_RAMP_MASK,
 911                                         val << S5M8767_DVS_BUCK_RAMP_SHIFT);
 912         }
 913
 914         for (i = 0; i < pdata->num_regulators; i++) {
 915                 const struct sec_voltage_desc *desc;
 916                 unsigned int id = pdata->regulators[i].id;
 917                 int enable_reg, enable_val;
 918                 struct regulator_dev *rdev;
 919
 920                 BUILD_BUG_ON(ARRAY_SIZE(regulators) != ARRAY_SIZE(reg_voltage_map));
 921                 if (WARN_ON_ONCE(id >= ARRAY_SIZE(regulators)))
 922                         continue;
 923
 924                 desc = reg_voltage_map[id];
 925                 if (desc) {
 926                         regulators[id].n_voltages =
 927                                 (desc->max - desc->min) / desc->step + 1;
 928                         regulators[id].min_uV = desc->min;
 929                         regulators[id].uV_step = desc->step;
 930                         regulators[id].vsel_reg =
 931                                 s5m8767_get_vsel_reg(id, s5m8767);
 932                         if (id < S5M8767_BUCK1)
 933                                 regulators[id].vsel_mask = 0x3f;
 934                         else
 935                                 regulators[id].vsel_mask = 0xff;
 936
 937                         ret = s5m8767_get_register(s5m8767, id, &enable_reg,
 938                                              &enable_val);
 939                         if (ret) {
 940                                 dev_err(s5m8767->dev, "error reading registers\n");
 941                                 return ret;
 942                         }
 943                         regulators[id].enable_reg = enable_reg;
 944                         regulators[id].enable_mask = S5M8767_ENCTRL_MASK;
 945                         regulators[id].enable_val = enable_val;
 946                 }
 947
 948                 config.dev = s5m8767->dev;
 949                 config.init_data = pdata->regulators[i].initdata;
 950                 config.driver_data = s5m8767;
 951                 config.regmap = iodev->regmap_pmic;
 952                 config.of_node = pdata->regulators[i].reg_node;
 953                 config.ena_gpiod = NULL;
 954                 if (pdata->regulators[i].ext_control_gpiod) {
 955                         /* Assigns config.ena_gpiod */
 956                         s5m8767_regulator_config_ext_control(s5m8767,
 957                                         &pdata->regulators[i], &config);
 958
 959                         /*
 960                          * Hand the GPIO descriptor management over to the
 961                          * regulator core, remove it from devres management.
 962                          */
 963                         devm_gpiod_unhinge(s5m8767->dev, config.ena_gpiod);
 964                 }
 965                 rdev = devm_regulator_register(&pdev->dev, &regulators[id],
 966                                                   &config);
 967                 if (IS_ERR(rdev)) {
 968                         ret = PTR_ERR(rdev);
 969                         dev_err(s5m8767->dev, "regulator init failed for %d\n",
 970                                         id);
 971                         return ret;
 972                 }
 973
 974                 if (pdata->regulators[i].ext_control_gpiod) {
 975                         ret = s5m8767_enable_ext_control(s5m8767, rdev);
 976                         if (ret < 0) {
 977                                 dev_err(s5m8767->dev,
 978                                                 "failed to enable gpio control over %s: %d\n",
 979                                                 rdev->desc->name, ret);
 980                                 return ret;
 981                         }
 982                 }
 983         }
 984
 985         return 0;
 986 }
 987
 988 static const struct platform_device_id s5m8767_pmic_id[] = {
 989         { "s5m8767-pmic", 0},
 990         { },
 991 };
 992 MODULE_DEVICE_TABLE(platform, s5m8767_pmic_id);
 993
 994 static struct platform_driver s5m8767_pmic_driver = {
 995         .driver = {
 996                 .name = "s5m8767-pmic",
 997                 .probe_type = PROBE_PREFER_ASYNCHRONOUS,
 998         },
 999         .probe = s5m8767_pmic_probe,
1000         .id_table = s5m8767_pmic_id,
1001 };
1002 module_platform_driver(s5m8767_pmic_driver);
1003
1004 /* Module information */
1005 MODULE_AUTHOR("Sangbeom Kim <[email protected]>");
1006 MODULE_DESCRIPTION("Samsung S5M8767 Regulator Driver");
1007 MODULE_LICENSE("GPL");