drivers/regulator/rk808-regulator.c

   1 /*
   2  * Regulator driver for Rockchip RK808/RK818
   3  *
   4  * Copyright (c) 2014, Fuzhou Rockchip Electronics Co., Ltd
   5  *
   6  * Author: Chris Zhong <zyw@rock-chips.com>
   7  * Author: Zhang Qing <zhangqing@rock-chips.com>
   8  *
   9  * Copyright (C) 2016 PHYTEC Messtechnik GmbH
  10  *
  11  * Author: Wadim Egorov <w.egorov@phytec.de>
  12  *
  13  * This program is free software; you can redistribute it and/or modify it
  14  * under the terms and conditions of the GNU General Public License,
  15  * version 2, as published by the Free Software Foundation.
  16  *
  17  * This program is distributed in the hope it will be useful, but WITHOUT
  18  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  19  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  20  * more details.
  21  */
  22
  23 #include <linux/delay.h>
  24 #include <linux/gpio.h>
  25 #include <linux/i2c.h>
  26 #include <linux/module.h>
  27 #include <linux/of_device.h>
  28 #include <linux/of_gpio.h>
  29 #include <linux/mfd/rk808.h>
  30 #include <linux/regulator/driver.h>
  31 #include <linux/regulator/of_regulator.h>
  32 #include <linux/gpio/consumer.h>
  33
  34 /* Field Definitions */
  35 #define RK808_BUCK_VSEL_MASK    0x3f
  36 #define RK808_BUCK4_VSEL_MASK   0xf
  37 #define RK808_LDO_VSEL_MASK     0x1f
  38
  39 #define RK818_BUCK_VSEL_MASK            0x3f
  40 #define RK818_BUCK4_VSEL_MASK           0x1f
  41 #define RK818_LDO_VSEL_MASK             0x1f
  42 #define RK818_LDO3_ON_VSEL_MASK         0xf
  43 #define RK818_BOOST_ON_VSEL_MASK        0xe0
  44
  45 /* Ramp rate definitions for buck1 / buck2 only */
  46 #define RK808_RAMP_RATE_OFFSET          3
  47 #define RK808_RAMP_RATE_MASK            (3 << RK808_RAMP_RATE_OFFSET)
  48 #define RK808_RAMP_RATE_2MV_PER_US      (0 << RK808_RAMP_RATE_OFFSET)
  49 #define RK808_RAMP_RATE_4MV_PER_US      (1 << RK808_RAMP_RATE_OFFSET)
  50 #define RK808_RAMP_RATE_6MV_PER_US      (2 << RK808_RAMP_RATE_OFFSET)
  51 #define RK808_RAMP_RATE_10MV_PER_US     (3 << RK808_RAMP_RATE_OFFSET)
  52
  53 #define RK808_DVS2_POL          BIT(2)
  54 #define RK808_DVS1_POL          BIT(1)
  55
  56 /* Offset from XXX_ON_VSEL to XXX_SLP_VSEL */
  57 #define RK808_SLP_REG_OFFSET 1
  58
  59 /* Offset from XXX_ON_VSEL to XXX_DVS_VSEL */
  60 #define RK808_DVS_REG_OFFSET 2
  61
  62 /* Offset from XXX_EN_REG to SLEEP_SET_OFF_XXX */
  63 #define RK808_SLP_SET_OFF_REG_OFFSET 2
  64
  65 /* max steps for increase voltage of Buck1/2, equal 100mv*/
  66 #define MAX_STEPS_ONE_TIME 8
  67
  68 #define RK8XX_DESC(_id, _match, _supply, _min, _max, _step, _vreg,      \
  69         _vmask, _ereg, _emask, _etime)                                  \
  70         [_id] = {                                                       \
  71                 .name           = (_match),                             \
  72                 .supply_name    = (_supply),                            \
  73                 .of_match       = of_match_ptr(_match),                 \
  74                 .regulators_node = of_match_ptr("regulators"),          \
  75                 .type           = REGULATOR_VOLTAGE,                    \
  76                 .id             = (_id),                                \
  77                 .n_voltages     = (((_max) - (_min)) / (_step) + 1),    \
  78                 .owner          = THIS_MODULE,                          \
  79                 .min_uV         = (_min) * 1000,                        \
  80                 .uV_step        = (_step) * 1000,                       \
  81                 .vsel_reg       = (_vreg),                              \
  82                 .vsel_mask      = (_vmask),                             \
  83                 .enable_reg     = (_ereg),                              \
  84                 .enable_mask    = (_emask),                             \
  85                 .enable_time    = (_etime),                             \
  86                 .ops            = &rk808_reg_ops,                       \
  87         }
  88
  89 #define RK8XX_DESC_SWITCH(_id, _match, _supply, _ereg, _emask)          \
  90         [_id] = {                                                       \
  91                 .name           = (_match),                             \
  92                 .supply_name    = (_supply),                            \
  93                 .of_match       = of_match_ptr(_match),                 \
  94                 .regulators_node = of_match_ptr("regulators"),          \
  95                 .type           = REGULATOR_VOLTAGE,                    \
  96                 .id             = (_id),                                \
  97                 .enable_reg     = (_ereg),                              \
  98                 .enable_mask    = (_emask),                             \
  99                 .owner          = THIS_MODULE,                          \
 100                 .ops            = &rk808_switch_ops                     \
 101         }
 102
 103
 104 struct rk808_regulator_data {
 105         struct gpio_desc *dvs_gpio[2];
 106 };
 107
 108 static const int rk808_buck_config_regs[] = {
 109         RK808_BUCK1_CONFIG_REG,
 110         RK808_BUCK2_CONFIG_REG,
 111         RK808_BUCK3_CONFIG_REG,
 112         RK808_BUCK4_CONFIG_REG,
 113 };
 114
 115 static const struct regulator_linear_range rk808_ldo3_voltage_ranges[] = {
 116         REGULATOR_LINEAR_RANGE(800000, 0, 13, 100000),
 117         REGULATOR_LINEAR_RANGE(2500000, 15, 15, 0),
 118 };
 119
 120 static int rk808_buck1_2_get_voltage_sel_regmap(struct regulator_dev *rdev)
 121 {
 122         struct rk808_regulator_data *pdata = rdev_get_drvdata(rdev);
 123         int id = rdev->desc->id - RK808_ID_DCDC1;
 124         struct gpio_desc *gpio = pdata->dvs_gpio[id];
 125         unsigned int val;
 126         int ret;
 127
 128         if (!gpio || gpiod_get_value(gpio) == 0)
 129                 return regulator_get_voltage_sel_regmap(rdev);
 130
 131         ret = regmap_read(rdev->regmap,
 132                           rdev->desc->vsel_reg + RK808_DVS_REG_OFFSET,
 133                           &val);
 134         if (ret != 0)
 135                 return ret;
 136
 137         val &= rdev->desc->vsel_mask;
 138         val >>= ffs(rdev->desc->vsel_mask) - 1;
 139
 140         return val;
 141 }
 142
 143 static int rk808_buck1_2_i2c_set_voltage_sel(struct regulator_dev *rdev,
 144                                              unsigned sel)
 145 {
 146         int ret, delta_sel;
 147         unsigned int old_sel, tmp, val, mask = rdev->desc->vsel_mask;
 148
 149         ret = regmap_read(rdev->regmap, rdev->desc->vsel_reg, &val);
 150         if (ret != 0)
 151                 return ret;
 152
 153         tmp = val & ~mask;
 154         old_sel = val & mask;
 155         old_sel >>= ffs(mask) - 1;
 156         delta_sel = sel - old_sel;
 157
 158         /*
 159          * If directly modify the register to change the voltage, we will face
 160          * the risk of overshoot. Put it into a multi-step, can effectively
 161          * avoid this problem, a step is 100mv here.
 162          */
 163         while (delta_sel > MAX_STEPS_ONE_TIME) {
 164                 old_sel += MAX_STEPS_ONE_TIME;
 165                 val = old_sel << (ffs(mask) - 1);
 166                 val |= tmp;
 167
 168                 /*
 169                  * i2c is 400kHz (2.5us per bit) and we must transmit _at least_
 170                  * 3 bytes (24 bits) plus start and stop so 26 bits.  So we've
 171                  * got more than 65 us between each voltage change and thus
 172                  * won't ramp faster than ~1500 uV / us.
 173                  */
 174                 ret = regmap_write(rdev->regmap, rdev->desc->vsel_reg, val);
 175                 delta_sel = sel - old_sel;
 176         }
 177
 178         sel <<= ffs(mask) - 1;
 179         val = tmp | sel;
 180         ret = regmap_write(rdev->regmap, rdev->desc->vsel_reg, val);
 181
 182         /*
 183          * When we change the voltage register directly, the ramp rate is about
 184          * 100000uv/us, wait 1us to make sure the target voltage to be stable,
 185          * so we needn't wait extra time after that.
 186          */
 187         udelay(1);
 188
 189         return ret;
 190 }
 191
 192 static int rk808_buck1_2_set_voltage_sel(struct regulator_dev *rdev,
 193                                          unsigned sel)
 194 {
 195         struct rk808_regulator_data *pdata = rdev_get_drvdata(rdev);
 196         int id = rdev->desc->id - RK808_ID_DCDC1;
 197         struct gpio_desc *gpio = pdata->dvs_gpio[id];
 198         unsigned int reg = rdev->desc->vsel_reg;
 199         unsigned old_sel;
 200         int ret, gpio_level;
 201
 202         if (!gpio)
 203                 return rk808_buck1_2_i2c_set_voltage_sel(rdev, sel);
 204
 205         gpio_level = gpiod_get_value(gpio);
 206         if (gpio_level == 0) {
 207                 reg += RK808_DVS_REG_OFFSET;
 208                 ret = regmap_read(rdev->regmap, rdev->desc->vsel_reg, &old_sel);
 209         } else {
 210                 ret = regmap_read(rdev->regmap,
 211                                   reg + RK808_DVS_REG_OFFSET,
 212                                   &old_sel);
 213         }
 214
 215         if (ret != 0)
 216                 return ret;
 217
 218         sel <<= ffs(rdev->desc->vsel_mask) - 1;
 219         sel |= old_sel & ~rdev->desc->vsel_mask;
 220
 221         ret = regmap_write(rdev->regmap, reg, sel);
 222         if (ret)
 223                 return ret;
 224
 225         gpiod_set_value(gpio, !gpio_level);
 226
 227         return ret;
 228 }
 229
 230 static int rk808_buck1_2_set_voltage_time_sel(struct regulator_dev *rdev,
 231                                        unsigned int old_selector,
 232                                        unsigned int new_selector)
 233 {
 234         struct rk808_regulator_data *pdata = rdev_get_drvdata(rdev);
 235         int id = rdev->desc->id - RK808_ID_DCDC1;
 236         struct gpio_desc *gpio = pdata->dvs_gpio[id];
 237
 238         /* if there is no dvs1/2 pin, we don't need wait extra time here. */
 239         if (!gpio)
 240                 return 0;
 241
 242         return regulator_set_voltage_time_sel(rdev, old_selector, new_selector);
 243 }
 244
 245 static int rk808_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
 246 {
 247         unsigned int ramp_value = RK808_RAMP_RATE_10MV_PER_US;
 248         unsigned int reg = rk808_buck_config_regs[rdev->desc->id -
 249                                                   RK808_ID_DCDC1];
 250
 251         switch (ramp_delay) {
 252         case 1 ... 2000:
 253                 ramp_value = RK808_RAMP_RATE_2MV_PER_US;
 254                 break;
 255         case 2001 ... 4000:
 256                 ramp_value = RK808_RAMP_RATE_4MV_PER_US;
 257                 break;
 258         case 4001 ... 6000:
 259                 ramp_value = RK808_RAMP_RATE_6MV_PER_US;
 260                 break;
 261         case 6001 ... 10000:
 262                 break;
 263         default:
 264                 pr_warn("%s ramp_delay: %d not supported, setting 10000\n",
 265                         rdev->desc->name, ramp_delay);
 266         }
 267
 268         return regmap_update_bits(rdev->regmap, reg,
 269                                   RK808_RAMP_RATE_MASK, ramp_value);
 270 }
 271
 272 static int rk808_set_suspend_voltage(struct regulator_dev *rdev, int uv)
 273 {
 274         unsigned int reg;
 275         int sel = regulator_map_voltage_linear(rdev, uv, uv);
 276
 277         if (sel < 0)
 278                 return -EINVAL;
 279
 280         reg = rdev->desc->vsel_reg + RK808_SLP_REG_OFFSET;
 281
 282         return regmap_update_bits(rdev->regmap, reg,
 283                                   rdev->desc->vsel_mask,
 284                                   sel);
 285 }
 286
 287 static int rk808_set_suspend_voltage_range(struct regulator_dev *rdev, int uv)
 288 {
 289         unsigned int reg;
 290         int sel = regulator_map_voltage_linear_range(rdev, uv, uv);
 291
 292         if (sel < 0)
 293                 return -EINVAL;
 294
 295         reg = rdev->desc->vsel_reg + RK808_SLP_REG_OFFSET;
 296
 297         return regmap_update_bits(rdev->regmap, reg,
 298                                   rdev->desc->vsel_mask,
 299                                   sel);
 300 }
 301
 302 static int rk808_set_suspend_enable(struct regulator_dev *rdev)
 303 {
 304         unsigned int reg;
 305
 306         reg = rdev->desc->enable_reg + RK808_SLP_SET_OFF_REG_OFFSET;
 307
 308         return regmap_update_bits(rdev->regmap, reg,
 309                                   rdev->desc->enable_mask,
 310                                   0);
 311 }
 312
 313 static int rk808_set_suspend_disable(struct regulator_dev *rdev)
 314 {
 315         unsigned int reg;
 316
 317         reg = rdev->desc->enable_reg + RK808_SLP_SET_OFF_REG_OFFSET;
 318
 319         return regmap_update_bits(rdev->regmap, reg,
 320                                   rdev->desc->enable_mask,
 321                                   rdev->desc->enable_mask);
 322 }
 323
 324 static struct regulator_ops rk808_buck1_2_ops = {
 325         .list_voltage           = regulator_list_voltage_linear,
 326         .map_voltage            = regulator_map_voltage_linear,
 327         .get_voltage_sel        = rk808_buck1_2_get_voltage_sel_regmap,
 328         .set_voltage_sel        = rk808_buck1_2_set_voltage_sel,
 329         .set_voltage_time_sel   = rk808_buck1_2_set_voltage_time_sel,
 330         .enable                 = regulator_enable_regmap,
 331         .disable                = regulator_disable_regmap,
 332         .is_enabled             = regulator_is_enabled_regmap,
 333         .set_ramp_delay         = rk808_set_ramp_delay,
 334         .set_suspend_voltage    = rk808_set_suspend_voltage,
 335         .set_suspend_enable     = rk808_set_suspend_enable,
 336         .set_suspend_disable    = rk808_set_suspend_disable,
 337 };
 338
 339 static struct regulator_ops rk808_reg_ops = {
 340         .list_voltage           = regulator_list_voltage_linear,
 341         .map_voltage            = regulator_map_voltage_linear,
 342         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 343         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 344         .enable                 = regulator_enable_regmap,
 345         .disable                = regulator_disable_regmap,
 346         .is_enabled             = regulator_is_enabled_regmap,
 347         .set_suspend_voltage    = rk808_set_suspend_voltage,
 348         .set_suspend_enable     = rk808_set_suspend_enable,
 349         .set_suspend_disable    = rk808_set_suspend_disable,
 350 };
 351
 352 static struct regulator_ops rk808_reg_ops_ranges = {
 353         .list_voltage           = regulator_list_voltage_linear_range,
 354         .map_voltage            = regulator_map_voltage_linear_range,
 355         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 356         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 357         .enable                 = regulator_enable_regmap,
 358         .disable                = regulator_disable_regmap,
 359         .is_enabled             = regulator_is_enabled_regmap,
 360         .set_suspend_voltage    = rk808_set_suspend_voltage_range,
 361         .set_suspend_enable     = rk808_set_suspend_enable,
 362         .set_suspend_disable    = rk808_set_suspend_disable,
 363 };
 364
 365 static struct regulator_ops rk808_switch_ops = {
 366         .enable                 = regulator_enable_regmap,
 367         .disable                = regulator_disable_regmap,
 368         .is_enabled             = regulator_is_enabled_regmap,
 369         .set_suspend_enable     = rk808_set_suspend_enable,
 370         .set_suspend_disable    = rk808_set_suspend_disable,
 371 };
 372
 373 static const struct regulator_desc rk808_reg[] = {
 374         {
 375                 .name = "DCDC_REG1",
 376                 .supply_name = "vcc1",
 377                 .of_match = of_match_ptr("DCDC_REG1"),
 378                 .regulators_node = of_match_ptr("regulators"),
 379                 .id = RK808_ID_DCDC1,
 380                 .ops = &rk808_buck1_2_ops,
 381                 .type = REGULATOR_VOLTAGE,
 382                 .min_uV = 712500,
 383                 .uV_step = 12500,
 384                 .n_voltages = 64,
 385                 .vsel_reg = RK808_BUCK1_ON_VSEL_REG,
 386                 .vsel_mask = RK808_BUCK_VSEL_MASK,
 387                 .enable_reg = RK808_DCDC_EN_REG,
 388                 .enable_mask = BIT(0),
 389                 .owner = THIS_MODULE,
 390         }, {
 391                 .name = "DCDC_REG2",
 392                 .supply_name = "vcc2",
 393                 .of_match = of_match_ptr("DCDC_REG2"),
 394                 .regulators_node = of_match_ptr("regulators"),
 395                 .id = RK808_ID_DCDC2,
 396                 .ops = &rk808_buck1_2_ops,
 397                 .type = REGULATOR_VOLTAGE,
 398                 .min_uV = 712500,
 399                 .uV_step = 12500,
 400                 .n_voltages = 64,
 401                 .vsel_reg = RK808_BUCK2_ON_VSEL_REG,
 402                 .vsel_mask = RK808_BUCK_VSEL_MASK,
 403                 .enable_reg = RK808_DCDC_EN_REG,
 404                 .enable_mask = BIT(1),
 405                 .owner = THIS_MODULE,
 406         }, {
 407                 .name = "DCDC_REG3",
 408                 .supply_name = "vcc3",
 409                 .of_match = of_match_ptr("DCDC_REG3"),
 410                 .regulators_node = of_match_ptr("regulators"),
 411                 .id = RK808_ID_DCDC3,
 412                 .ops = &rk808_switch_ops,
 413                 .type = REGULATOR_VOLTAGE,
 414                 .n_voltages = 1,
 415                 .enable_reg = RK808_DCDC_EN_REG,
 416                 .enable_mask = BIT(2),
 417                 .owner = THIS_MODULE,
 418         },
 419         RK8XX_DESC(RK808_ID_DCDC4, "DCDC_REG4", "vcc4", 1800, 3300, 100,
 420                 RK808_BUCK4_ON_VSEL_REG, RK808_BUCK4_VSEL_MASK,
 421                 RK808_DCDC_EN_REG, BIT(3), 0),
 422         RK8XX_DESC(RK808_ID_LDO1, "LDO_REG1", "vcc6", 1800, 3400, 100,
 423                 RK808_LDO1_ON_VSEL_REG, RK808_LDO_VSEL_MASK, RK808_LDO_EN_REG,
 424                 BIT(0), 400),
 425         RK8XX_DESC(RK808_ID_LDO2, "LDO_REG2", "vcc6", 1800, 3400, 100,
 426                 RK808_LDO2_ON_VSEL_REG, RK808_LDO_VSEL_MASK, RK808_LDO_EN_REG,
 427                 BIT(1), 400),
 428         {
 429                 .name = "LDO_REG3",
 430                 .supply_name = "vcc7",
 431                 .of_match = of_match_ptr("LDO_REG3"),
 432                 .regulators_node = of_match_ptr("regulators"),
 433                 .id = RK808_ID_LDO3,
 434                 .ops = &rk808_reg_ops_ranges,
 435                 .type = REGULATOR_VOLTAGE,
 436                 .n_voltages = 16,
 437                 .linear_ranges = rk808_ldo3_voltage_ranges,
 438                 .n_linear_ranges = ARRAY_SIZE(rk808_ldo3_voltage_ranges),
 439                 .vsel_reg = RK808_LDO3_ON_VSEL_REG,
 440                 .vsel_mask = RK808_BUCK4_VSEL_MASK,
 441                 .enable_reg = RK808_LDO_EN_REG,
 442                 .enable_mask = BIT(2),
 443                 .enable_time = 400,
 444                 .owner = THIS_MODULE,
 445         },
 446         RK8XX_DESC(RK808_ID_LDO4, "LDO_REG4", "vcc9", 1800, 3400, 100,
 447                 RK808_LDO4_ON_VSEL_REG, RK808_LDO_VSEL_MASK, RK808_LDO_EN_REG,
 448                 BIT(3), 400),
 449         RK8XX_DESC(RK808_ID_LDO5, "LDO_REG5", "vcc9", 1800, 3400, 100,
 450                 RK808_LDO5_ON_VSEL_REG, RK808_LDO_VSEL_MASK, RK808_LDO_EN_REG,
 451                 BIT(4), 400),
 452         RK8XX_DESC(RK808_ID_LDO6, "LDO_REG6", "vcc10", 800, 2500, 100,
 453                 RK808_LDO6_ON_VSEL_REG, RK808_LDO_VSEL_MASK, RK808_LDO_EN_REG,
 454                 BIT(5), 400),
 455         RK8XX_DESC(RK808_ID_LDO7, "LDO_REG7", "vcc7", 800, 2500, 100,
 456                 RK808_LDO7_ON_VSEL_REG, RK808_LDO_VSEL_MASK, RK808_LDO_EN_REG,
 457                 BIT(6), 400),
 458         RK8XX_DESC(RK808_ID_LDO8, "LDO_REG8", "vcc11", 1800, 3400, 100,
 459                 RK808_LDO8_ON_VSEL_REG, RK808_LDO_VSEL_MASK, RK808_LDO_EN_REG,
 460                 BIT(7), 400),
 461         RK8XX_DESC_SWITCH(RK808_ID_SWITCH1, "SWITCH_REG1", "vcc8",
 462                 RK808_DCDC_EN_REG, BIT(5)),
 463         RK8XX_DESC_SWITCH(RK808_ID_SWITCH2, "SWITCH_REG2", "vcc12",
 464                 RK808_DCDC_EN_REG, BIT(6)),
 465 };
 466
 467 static const struct regulator_desc rk818_reg[] = {
 468         {
 469                 .name = "DCDC_REG1",
 470                 .supply_name = "vcc1",
 471                 .of_match = of_match_ptr("DCDC_REG1"),
 472                 .regulators_node = of_match_ptr("regulators"),
 473                 .id = RK818_ID_DCDC1,
 474                 .ops = &rk808_reg_ops,
 475                 .type = REGULATOR_VOLTAGE,
 476                 .min_uV = 712500,
 477                 .uV_step = 12500,
 478                 .n_voltages = 64,
 479                 .vsel_reg = RK818_BUCK1_ON_VSEL_REG,
 480                 .vsel_mask = RK818_BUCK_VSEL_MASK,
 481                 .enable_reg = RK818_DCDC_EN_REG,
 482                 .enable_mask = BIT(0),
 483                 .owner = THIS_MODULE,
 484         }, {
 485                 .name = "DCDC_REG2",
 486                 .supply_name = "vcc2",
 487                 .of_match = of_match_ptr("DCDC_REG2"),
 488                 .regulators_node = of_match_ptr("regulators"),
 489                 .id = RK818_ID_DCDC2,
 490                 .ops = &rk808_reg_ops,
 491                 .type = REGULATOR_VOLTAGE,
 492                 .min_uV = 712500,
 493                 .uV_step = 12500,
 494                 .n_voltages = 64,
 495                 .vsel_reg = RK818_BUCK2_ON_VSEL_REG,
 496                 .vsel_mask = RK818_BUCK_VSEL_MASK,
 497                 .enable_reg = RK818_DCDC_EN_REG,
 498                 .enable_mask = BIT(1),
 499                 .owner = THIS_MODULE,
 500         }, {
 501                 .name = "DCDC_REG3",
 502                 .supply_name = "vcc3",
 503                 .of_match = of_match_ptr("DCDC_REG3"),
 504                 .regulators_node = of_match_ptr("regulators"),
 505                 .id = RK818_ID_DCDC3,
 506                 .ops = &rk808_switch_ops,
 507                 .type = REGULATOR_VOLTAGE,
 508                 .n_voltages = 1,
 509                 .enable_reg = RK818_DCDC_EN_REG,
 510                 .enable_mask = BIT(2),
 511                 .owner = THIS_MODULE,
 512         },
 513         RK8XX_DESC(RK818_ID_DCDC4, "DCDC_REG4", "vcc4", 1800, 3600, 100,
 514                 RK818_BUCK4_ON_VSEL_REG, RK818_BUCK4_VSEL_MASK,
 515                 RK818_DCDC_EN_REG, BIT(3), 0),
 516         RK8XX_DESC(RK818_ID_BOOST, "DCDC_BOOST", "boost", 4700, 5400, 100,
 517                 RK818_BOOST_LDO9_ON_VSEL_REG, RK818_BOOST_ON_VSEL_MASK,
 518                 RK818_DCDC_EN_REG, BIT(4), 0),
 519         RK8XX_DESC(RK818_ID_LDO1, "LDO_REG1", "vcc6", 1800, 3400, 100,
 520                 RK818_LDO1_ON_VSEL_REG, RK818_LDO_VSEL_MASK, RK818_LDO_EN_REG,
 521                 BIT(0), 400),
 522         RK8XX_DESC(RK818_ID_LDO2, "LDO_REG2", "vcc6", 1800, 3400, 100,
 523                 RK818_LDO1_ON_VSEL_REG, RK818_LDO_VSEL_MASK, RK818_LDO_EN_REG,
 524                 BIT(1), 400),
 525         {
 526                 .name = "LDO_REG3",
 527                 .supply_name = "vcc7",
 528                 .of_match = of_match_ptr("LDO_REG3"),
 529                 .regulators_node = of_match_ptr("regulators"),
 530                 .id = RK818_ID_LDO3,
 531                 .ops = &rk808_reg_ops_ranges,
 532                 .type = REGULATOR_VOLTAGE,
 533                 .n_voltages = 16,
 534                 .linear_ranges = rk808_ldo3_voltage_ranges,
 535                 .n_linear_ranges = ARRAY_SIZE(rk808_ldo3_voltage_ranges),
 536                 .vsel_reg = RK818_LDO3_ON_VSEL_REG,
 537                 .vsel_mask = RK818_LDO3_ON_VSEL_MASK,
 538                 .enable_reg = RK818_LDO_EN_REG,
 539                 .enable_mask = BIT(2),
 540                 .enable_time = 400,
 541                 .owner = THIS_MODULE,
 542         },
 543         RK8XX_DESC(RK818_ID_LDO4, "LDO_REG4", "vcc8", 1800, 3400, 100,
 544                 RK818_LDO4_ON_VSEL_REG, RK818_LDO_VSEL_MASK, RK818_LDO_EN_REG,
 545                 BIT(3), 400),
 546         RK8XX_DESC(RK818_ID_LDO5, "LDO_REG5", "vcc7", 1800, 3400, 100,
 547                 RK818_LDO5_ON_VSEL_REG, RK818_LDO_VSEL_MASK, RK818_LDO_EN_REG,
 548                 BIT(4), 400),
 549         RK8XX_DESC(RK818_ID_LDO6, "LDO_REG6", "vcc8", 800, 2500, 100,
 550                 RK818_LDO6_ON_VSEL_REG, RK818_LDO_VSEL_MASK, RK818_LDO_EN_REG,
 551                 BIT(5), 400),
 552         RK8XX_DESC(RK818_ID_LDO7, "LDO_REG7", "vcc7", 800, 2500, 100,
 553                 RK818_LDO7_ON_VSEL_REG, RK818_LDO_VSEL_MASK, RK818_LDO_EN_REG,
 554                 BIT(6), 400),
 555         RK8XX_DESC(RK818_ID_LDO8, "LDO_REG8", "vcc8", 1800, 3400, 100,
 556                 RK818_LDO8_ON_VSEL_REG, RK818_LDO_VSEL_MASK, RK818_LDO_EN_REG,
 557                 BIT(7), 400),
 558         RK8XX_DESC(RK818_ID_LDO9, "LDO_REG9", "vcc9", 1800, 3400, 100,
 559                 RK818_BOOST_LDO9_ON_VSEL_REG, RK818_LDO_VSEL_MASK,
 560                 RK818_DCDC_EN_REG, BIT(5), 400),
 561         RK8XX_DESC_SWITCH(RK818_ID_SWITCH, "SWITCH_REG", "vcc9",
 562                 RK818_DCDC_EN_REG, BIT(6)),
 563         RK8XX_DESC_SWITCH(RK818_ID_HDMI_SWITCH, "HDMI_SWITCH", "h_5v",
 564                 RK818_H5V_EN_REG, BIT(0)),
 565         RK8XX_DESC_SWITCH(RK818_ID_OTG_SWITCH, "OTG_SWITCH", "usb",
 566                 RK818_DCDC_EN_REG, BIT(7)),
 567 };
 568
 569 static int rk808_regulator_dt_parse_pdata(struct device *dev,
 570                                    struct device *client_dev,
 571                                    struct regmap *map,
 572                                    struct rk808_regulator_data *pdata)
 573 {
 574         struct device_node *np;
 575         int tmp, ret = 0, i;
 576
 577         np = of_get_child_by_name(client_dev->of_node, "regulators");
 578         if (!np)
 579                 return -ENXIO;
 580
 581         for (i = 0; i < ARRAY_SIZE(pdata->dvs_gpio); i++) {
 582                 pdata->dvs_gpio[i] =
 583                         devm_gpiod_get_index_optional(client_dev, "dvs", i,
 584                                                       GPIOD_OUT_LOW);
 585                 if (IS_ERR(pdata->dvs_gpio[i])) {
 586                         ret = PTR_ERR(pdata->dvs_gpio[i]);
 587                         dev_err(dev, "failed to get dvs%d gpio (%d)\n", i, ret);
 588                         goto dt_parse_end;
 589                 }
 590
 591                 if (!pdata->dvs_gpio[i]) {
 592                         dev_warn(dev, "there is no dvs%d gpio\n", i);
 593                         continue;
 594                 }
 595
 596                 tmp = i ? RK808_DVS2_POL : RK808_DVS1_POL;
 597                 ret = regmap_update_bits(map, RK808_IO_POL_REG, tmp,
 598                                 gpiod_is_active_low(pdata->dvs_gpio[i]) ?
 599                                 0 : tmp);
 600         }
 601
 602 dt_parse_end:
 603         of_node_put(np);
 604         return ret;
 605 }
 606
 607 static int rk808_regulator_probe(struct platform_device *pdev)
 608 {
 609         struct rk808 *rk808 = dev_get_drvdata(pdev->dev.parent);
 610         struct i2c_client *client = rk808->i2c;
 611         struct regulator_config config = {};
 612         struct regulator_dev *rk808_rdev;
 613         struct rk808_regulator_data *pdata;
 614         const struct regulator_desc *regulators;
 615         int ret, i, nregulators;
 616
 617         pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
 618         if (!pdata)
 619                 return -ENOMEM;
 620
 621         ret = rk808_regulator_dt_parse_pdata(&pdev->dev, &client->dev,
 622                                              rk808->regmap, pdata);
 623         if (ret < 0)
 624                 return ret;
 625
 626         platform_set_drvdata(pdev, pdata);
 627
 628         switch (rk808->variant) {
 629         case RK808_ID:
 630                 regulators = rk808_reg;
 631                 nregulators = RK808_NUM_REGULATORS;
 632                 break;
 633         case RK818_ID:
 634                 regulators = rk818_reg;
 635                 nregulators = RK818_NUM_REGULATORS;
 636                 break;
 637         default:
 638                 dev_err(&client->dev, "unsupported RK8XX ID %lu\n",
 639                         rk808->variant);
 640                 return -EINVAL;
 641         }
 642
 643         config.dev = &client->dev;
 644         config.driver_data = pdata;
 645         config.regmap = rk808->regmap;
 646
 647         /* Instantiate the regulators */
 648         for (i = 0; i < nregulators; i++) {
 649                 rk808_rdev = devm_regulator_register(&pdev->dev,
 650                                                      &regulators[i], &config);
 651                 if (IS_ERR(rk808_rdev)) {
 652                         dev_err(&client->dev,
 653                                 "failed to register %d regulator\n", i);
 654                         return PTR_ERR(rk808_rdev);
 655                 }
 656         }
 657
 658         return 0;
 659 }
 660
 661 static struct platform_driver rk808_regulator_driver = {
 662         .probe = rk808_regulator_probe,
 663         .driver = {
 664                 .name = "rk808-regulator"
 665         },
 666 };
 667
 668 module_platform_driver(rk808_regulator_driver);
 669
 670 MODULE_DESCRIPTION("regulator driver for the RK808/RK818 series PMICs");
 671 MODULE_AUTHOR("Chris Zhong <zyw@rock-chips.com>");
 672 MODULE_AUTHOR("Zhang Qing <zhangqing@rock-chips.com>");
 673 MODULE_AUTHOR("Wadim Egorov <w.egorov@phytec.de>");
 674 MODULE_LICENSE("GPL");
 675 MODULE_ALIAS("platform:rk808-regulator");