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_get_id(rdev);
 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_get_id(rdev);
 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_get_id(rdev);
 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_get_id(rdev)];
 249
 250         switch (ramp_delay) {
 251         case 1 ... 2000:
 252                 ramp_value = RK808_RAMP_RATE_2MV_PER_US;
 253                 break;
 254         case 2001 ... 4000:
 255                 ramp_value = RK808_RAMP_RATE_4MV_PER_US;
 256                 break;
 257         case 4001 ... 6000:
 258                 ramp_value = RK808_RAMP_RATE_6MV_PER_US;
 259                 break;
 260         case 6001 ... 10000:
 261                 break;
 262         default:
 263                 pr_warn("%s ramp_delay: %d not supported, setting 10000\n",
 264                         rdev->desc->name, ramp_delay);
 265         }
 266
 267         return regmap_update_bits(rdev->regmap, reg,
 268                                   RK808_RAMP_RATE_MASK, ramp_value);
 269 }
 270
 271 static int rk808_set_suspend_voltage(struct regulator_dev *rdev, int uv)
 272 {
 273         unsigned int reg;
 274         int sel = regulator_map_voltage_linear(rdev, uv, uv);
 275
 276         if (sel < 0)
 277                 return -EINVAL;
 278
 279         reg = rdev->desc->vsel_reg + RK808_SLP_REG_OFFSET;
 280
 281         return regmap_update_bits(rdev->regmap, reg,
 282                                   rdev->desc->vsel_mask,
 283                                   sel);
 284 }
 285
 286 static int rk808_set_suspend_voltage_range(struct regulator_dev *rdev, int uv)
 287 {
 288         unsigned int reg;
 289         int sel = regulator_map_voltage_linear_range(rdev, uv, uv);
 290
 291         if (sel < 0)
 292                 return -EINVAL;
 293
 294         reg = rdev->desc->vsel_reg + RK808_SLP_REG_OFFSET;
 295
 296         return regmap_update_bits(rdev->regmap, reg,
 297                                   rdev->desc->vsel_mask,
 298                                   sel);
 299 }
 300
 301 static int rk808_set_suspend_enable(struct regulator_dev *rdev)
 302 {
 303         unsigned int reg;
 304
 305         reg = rdev->desc->enable_reg + RK808_SLP_SET_OFF_REG_OFFSET;
 306
 307         return regmap_update_bits(rdev->regmap, reg,
 308                                   rdev->desc->enable_mask,
 309                                   0);
 310 }
 311
 312 static int rk808_set_suspend_disable(struct regulator_dev *rdev)
 313 {
 314         unsigned int reg;
 315
 316         reg = rdev->desc->enable_reg + RK808_SLP_SET_OFF_REG_OFFSET;
 317
 318         return regmap_update_bits(rdev->regmap, reg,
 319                                   rdev->desc->enable_mask,
 320                                   rdev->desc->enable_mask);
 321 }
 322
 323 static struct regulator_ops rk808_buck1_2_ops = {
 324         .list_voltage           = regulator_list_voltage_linear,
 325         .map_voltage            = regulator_map_voltage_linear,
 326         .get_voltage_sel        = rk808_buck1_2_get_voltage_sel_regmap,
 327         .set_voltage_sel        = rk808_buck1_2_set_voltage_sel,
 328         .set_voltage_time_sel   = rk808_buck1_2_set_voltage_time_sel,
 329         .enable                 = regulator_enable_regmap,
 330         .disable                = regulator_disable_regmap,
 331         .is_enabled             = regulator_is_enabled_regmap,
 332         .set_ramp_delay         = rk808_set_ramp_delay,
 333         .set_suspend_voltage    = rk808_set_suspend_voltage,
 334         .set_suspend_enable     = rk808_set_suspend_enable,
 335         .set_suspend_disable    = rk808_set_suspend_disable,
 336 };
 337
 338 static struct regulator_ops rk808_reg_ops = {
 339         .list_voltage           = regulator_list_voltage_linear,
 340         .map_voltage            = regulator_map_voltage_linear,
 341         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 342         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 343         .enable                 = regulator_enable_regmap,
 344         .disable                = regulator_disable_regmap,
 345         .is_enabled             = regulator_is_enabled_regmap,
 346         .set_suspend_voltage    = rk808_set_suspend_voltage,
 347         .set_suspend_enable     = rk808_set_suspend_enable,
 348         .set_suspend_disable    = rk808_set_suspend_disable,
 349 };
 350
 351 static struct regulator_ops rk808_reg_ops_ranges = {
 352         .list_voltage           = regulator_list_voltage_linear_range,
 353         .map_voltage            = regulator_map_voltage_linear_range,
 354         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 355         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 356         .enable                 = regulator_enable_regmap,
 357         .disable                = regulator_disable_regmap,
 358         .is_enabled             = regulator_is_enabled_regmap,
 359         .set_suspend_voltage    = rk808_set_suspend_voltage_range,
 360         .set_suspend_enable     = rk808_set_suspend_enable,
 361         .set_suspend_disable    = rk808_set_suspend_disable,
 362 };
 363
 364 static struct regulator_ops rk808_switch_ops = {
 365         .enable                 = regulator_enable_regmap,
 366         .disable                = regulator_disable_regmap,
 367         .is_enabled             = regulator_is_enabled_regmap,
 368         .set_suspend_enable     = rk808_set_suspend_enable,
 369         .set_suspend_disable    = rk808_set_suspend_disable,
 370 };
 371
 372 static const struct regulator_desc rk808_reg[] = {
 373         {
 374                 .name = "DCDC_REG1",
 375                 .supply_name = "vcc1",
 376                 .of_match = of_match_ptr("DCDC_REG1"),
 377                 .regulators_node = of_match_ptr("regulators"),
 378                 .id = RK808_ID_DCDC1,
 379                 .ops = &rk808_buck1_2_ops,
 380                 .type = REGULATOR_VOLTAGE,
 381                 .min_uV = 712500,
 382                 .uV_step = 12500,
 383                 .n_voltages = 64,
 384                 .vsel_reg = RK808_BUCK1_ON_VSEL_REG,
 385                 .vsel_mask = RK808_BUCK_VSEL_MASK,
 386                 .enable_reg = RK808_DCDC_EN_REG,
 387                 .enable_mask = BIT(0),
 388                 .owner = THIS_MODULE,
 389         }, {
 390                 .name = "DCDC_REG2",
 391                 .supply_name = "vcc2",
 392                 .of_match = of_match_ptr("DCDC_REG2"),
 393                 .regulators_node = of_match_ptr("regulators"),
 394                 .id = RK808_ID_DCDC2,
 395                 .ops = &rk808_buck1_2_ops,
 396                 .type = REGULATOR_VOLTAGE,
 397                 .min_uV = 712500,
 398                 .uV_step = 12500,
 399                 .n_voltages = 64,
 400                 .vsel_reg = RK808_BUCK2_ON_VSEL_REG,
 401                 .vsel_mask = RK808_BUCK_VSEL_MASK,
 402                 .enable_reg = RK808_DCDC_EN_REG,
 403                 .enable_mask = BIT(1),
 404                 .owner = THIS_MODULE,
 405         }, {
 406                 .name = "DCDC_REG3",
 407                 .supply_name = "vcc3",
 408                 .of_match = of_match_ptr("DCDC_REG3"),
 409                 .regulators_node = of_match_ptr("regulators"),
 410                 .id = RK808_ID_DCDC3,
 411                 .ops = &rk808_switch_ops,
 412                 .type = REGULATOR_VOLTAGE,
 413                 .n_voltages = 1,
 414                 .enable_reg = RK808_DCDC_EN_REG,
 415                 .enable_mask = BIT(2),
 416                 .owner = THIS_MODULE,
 417         },
 418         RK8XX_DESC(RK808_ID_DCDC4, "DCDC_REG4", "vcc4", 1800, 3300, 100,
 419                 RK808_BUCK4_ON_VSEL_REG, RK808_BUCK4_VSEL_MASK,
 420                 RK808_DCDC_EN_REG, BIT(3), 0),
 421         RK8XX_DESC(RK808_ID_LDO1, "LDO_REG1", "vcc6", 1800, 3400, 100,
 422                 RK808_LDO1_ON_VSEL_REG, RK808_LDO_VSEL_MASK, RK808_LDO_EN_REG,
 423                 BIT(0), 400),
 424         RK8XX_DESC(RK808_ID_LDO2, "LDO_REG2", "vcc6", 1800, 3400, 100,
 425                 RK808_LDO2_ON_VSEL_REG, RK808_LDO_VSEL_MASK, RK808_LDO_EN_REG,
 426                 BIT(1), 400),
 427         {
 428                 .name = "LDO_REG3",
 429                 .supply_name = "vcc7",
 430                 .of_match = of_match_ptr("LDO_REG3"),
 431                 .regulators_node = of_match_ptr("regulators"),
 432                 .id = RK808_ID_LDO3,
 433                 .ops = &rk808_reg_ops_ranges,
 434                 .type = REGULATOR_VOLTAGE,
 435                 .n_voltages = 16,
 436                 .linear_ranges = rk808_ldo3_voltage_ranges,
 437                 .n_linear_ranges = ARRAY_SIZE(rk808_ldo3_voltage_ranges),
 438                 .vsel_reg = RK808_LDO3_ON_VSEL_REG,
 439                 .vsel_mask = RK808_BUCK4_VSEL_MASK,
 440                 .enable_reg = RK808_LDO_EN_REG,
 441                 .enable_mask = BIT(2),
 442                 .enable_time = 400,
 443                 .owner = THIS_MODULE,
 444         },
 445         RK8XX_DESC(RK808_ID_LDO4, "LDO_REG4", "vcc9", 1800, 3400, 100,
 446                 RK808_LDO4_ON_VSEL_REG, RK808_LDO_VSEL_MASK, RK808_LDO_EN_REG,
 447                 BIT(3), 400),
 448         RK8XX_DESC(RK808_ID_LDO5, "LDO_REG5", "vcc9", 1800, 3400, 100,
 449                 RK808_LDO5_ON_VSEL_REG, RK808_LDO_VSEL_MASK, RK808_LDO_EN_REG,
 450                 BIT(4), 400),
 451         RK8XX_DESC(RK808_ID_LDO6, "LDO_REG6", "vcc10", 800, 2500, 100,
 452                 RK808_LDO6_ON_VSEL_REG, RK808_LDO_VSEL_MASK, RK808_LDO_EN_REG,
 453                 BIT(5), 400),
 454         RK8XX_DESC(RK808_ID_LDO7, "LDO_REG7", "vcc7", 800, 2500, 100,
 455                 RK808_LDO7_ON_VSEL_REG, RK808_LDO_VSEL_MASK, RK808_LDO_EN_REG,
 456                 BIT(6), 400),
 457         RK8XX_DESC(RK808_ID_LDO8, "LDO_REG8", "vcc11", 1800, 3400, 100,
 458                 RK808_LDO8_ON_VSEL_REG, RK808_LDO_VSEL_MASK, RK808_LDO_EN_REG,
 459                 BIT(7), 400),
 460         RK8XX_DESC_SWITCH(RK808_ID_SWITCH1, "SWITCH_REG1", "vcc8",
 461                 RK808_DCDC_EN_REG, BIT(5)),
 462         RK8XX_DESC_SWITCH(RK808_ID_SWITCH2, "SWITCH_REG2", "vcc12",
 463                 RK808_DCDC_EN_REG, BIT(6)),
 464 };
 465
 466 static const struct regulator_desc rk818_reg[] = {
 467         {
 468                 .name = "DCDC_REG1",
 469                 .supply_name = "vcc1",
 470                 .of_match = of_match_ptr("DCDC_REG1"),
 471                 .regulators_node = of_match_ptr("regulators"),
 472                 .id = RK818_ID_DCDC1,
 473                 .ops = &rk808_reg_ops,
 474                 .type = REGULATOR_VOLTAGE,
 475                 .min_uV = 712500,
 476                 .uV_step = 12500,
 477                 .n_voltages = 64,
 478                 .vsel_reg = RK818_BUCK1_ON_VSEL_REG,
 479                 .vsel_mask = RK818_BUCK_VSEL_MASK,
 480                 .enable_reg = RK818_DCDC_EN_REG,
 481                 .enable_mask = BIT(0),
 482                 .owner = THIS_MODULE,
 483         }, {
 484                 .name = "DCDC_REG2",
 485                 .supply_name = "vcc2",
 486                 .of_match = of_match_ptr("DCDC_REG2"),
 487                 .regulators_node = of_match_ptr("regulators"),
 488                 .id = RK818_ID_DCDC2,
 489                 .ops = &rk808_reg_ops,
 490                 .type = REGULATOR_VOLTAGE,
 491                 .min_uV = 712500,
 492                 .uV_step = 12500,
 493                 .n_voltages = 64,
 494                 .vsel_reg = RK818_BUCK2_ON_VSEL_REG,
 495                 .vsel_mask = RK818_BUCK_VSEL_MASK,
 496                 .enable_reg = RK818_DCDC_EN_REG,
 497                 .enable_mask = BIT(1),
 498                 .owner = THIS_MODULE,
 499         }, {
 500                 .name = "DCDC_REG3",
 501                 .supply_name = "vcc3",
 502                 .of_match = of_match_ptr("DCDC_REG3"),
 503                 .regulators_node = of_match_ptr("regulators"),
 504                 .id = RK818_ID_DCDC3,
 505                 .ops = &rk808_switch_ops,
 506                 .type = REGULATOR_VOLTAGE,
 507                 .n_voltages = 1,
 508                 .enable_reg = RK818_DCDC_EN_REG,
 509                 .enable_mask = BIT(2),
 510                 .owner = THIS_MODULE,
 511         },
 512         RK8XX_DESC(RK818_ID_DCDC4, "DCDC_REG4", "vcc4", 1800, 3600, 100,
 513                 RK818_BUCK4_ON_VSEL_REG, RK818_BUCK4_VSEL_MASK,
 514                 RK818_DCDC_EN_REG, BIT(3), 0),
 515         RK8XX_DESC(RK818_ID_BOOST, "DCDC_BOOST", "boost", 4700, 5400, 100,
 516                 RK818_BOOST_LDO9_ON_VSEL_REG, RK818_BOOST_ON_VSEL_MASK,
 517                 RK818_DCDC_EN_REG, BIT(4), 0),
 518         RK8XX_DESC(RK818_ID_LDO1, "LDO_REG1", "vcc6", 1800, 3400, 100,
 519                 RK818_LDO1_ON_VSEL_REG, RK818_LDO_VSEL_MASK, RK818_LDO_EN_REG,
 520                 BIT(0), 400),
 521         RK8XX_DESC(RK818_ID_LDO2, "LDO_REG2", "vcc6", 1800, 3400, 100,
 522                 RK818_LDO1_ON_VSEL_REG, RK818_LDO_VSEL_MASK, RK818_LDO_EN_REG,
 523                 BIT(1), 400),
 524         {
 525                 .name = "LDO_REG3",
 526                 .supply_name = "vcc7",
 527                 .of_match = of_match_ptr("LDO_REG3"),
 528                 .regulators_node = of_match_ptr("regulators"),
 529                 .id = RK818_ID_LDO3,
 530                 .ops = &rk808_reg_ops_ranges,
 531                 .type = REGULATOR_VOLTAGE,
 532                 .n_voltages = 16,
 533                 .linear_ranges = rk808_ldo3_voltage_ranges,
 534                 .n_linear_ranges = ARRAY_SIZE(rk808_ldo3_voltage_ranges),
 535                 .vsel_reg = RK818_LDO3_ON_VSEL_REG,
 536                 .vsel_mask = RK818_LDO3_ON_VSEL_MASK,
 537                 .enable_reg = RK818_LDO_EN_REG,
 538                 .enable_mask = BIT(2),
 539                 .enable_time = 400,
 540                 .owner = THIS_MODULE,
 541         },
 542         RK8XX_DESC(RK818_ID_LDO4, "LDO_REG4", "vcc8", 1800, 3400, 100,
 543                 RK818_LDO4_ON_VSEL_REG, RK818_LDO_VSEL_MASK, RK818_LDO_EN_REG,
 544                 BIT(3), 400),
 545         RK8XX_DESC(RK818_ID_LDO5, "LDO_REG5", "vcc7", 1800, 3400, 100,
 546                 RK818_LDO5_ON_VSEL_REG, RK818_LDO_VSEL_MASK, RK818_LDO_EN_REG,
 547                 BIT(4), 400),
 548         RK8XX_DESC(RK818_ID_LDO6, "LDO_REG6", "vcc8", 800, 2500, 100,
 549                 RK818_LDO6_ON_VSEL_REG, RK818_LDO_VSEL_MASK, RK818_LDO_EN_REG,
 550                 BIT(5), 400),
 551         RK8XX_DESC(RK818_ID_LDO7, "LDO_REG7", "vcc7", 800, 2500, 100,
 552                 RK818_LDO7_ON_VSEL_REG, RK818_LDO_VSEL_MASK, RK818_LDO_EN_REG,
 553                 BIT(6), 400),
 554         RK8XX_DESC(RK818_ID_LDO8, "LDO_REG8", "vcc8", 1800, 3400, 100,
 555                 RK818_LDO8_ON_VSEL_REG, RK818_LDO_VSEL_MASK, RK818_LDO_EN_REG,
 556                 BIT(7), 400),
 557         RK8XX_DESC(RK818_ID_LDO9, "LDO_REG9", "vcc9", 1800, 3400, 100,
 558                 RK818_BOOST_LDO9_ON_VSEL_REG, RK818_LDO_VSEL_MASK,
 559                 RK818_DCDC_EN_REG, BIT(5), 400),
 560         RK8XX_DESC_SWITCH(RK818_ID_SWITCH, "SWITCH_REG", "vcc9",
 561                 RK818_DCDC_EN_REG, BIT(6)),
 562         RK8XX_DESC_SWITCH(RK818_ID_HDMI_SWITCH, "HDMI_SWITCH", "h_5v",
 563                 RK818_H5V_EN_REG, BIT(0)),
 564         RK8XX_DESC_SWITCH(RK818_ID_OTG_SWITCH, "OTG_SWITCH", "usb",
 565                 RK818_DCDC_EN_REG, BIT(7)),
 566 };
 567
 568 static int rk808_regulator_dt_parse_pdata(struct device *dev,
 569                                    struct device *client_dev,
 570                                    struct regmap *map,
 571                                    struct rk808_regulator_data *pdata)
 572 {
 573         struct device_node *np;
 574         int tmp, ret = 0, i;
 575
 576         np = of_get_child_by_name(client_dev->of_node, "regulators");
 577         if (!np)
 578                 return -ENXIO;
 579
 580         for (i = 0; i < ARRAY_SIZE(pdata->dvs_gpio); i++) {
 581                 pdata->dvs_gpio[i] =
 582                         devm_gpiod_get_index_optional(client_dev, "dvs", i,
 583                                                       GPIOD_OUT_LOW);
 584                 if (IS_ERR(pdata->dvs_gpio[i])) {
 585                         ret = PTR_ERR(pdata->dvs_gpio[i]);
 586                         dev_err(dev, "failed to get dvs%d gpio (%d)\n", i, ret);
 587                         goto dt_parse_end;
 588                 }
 589
 590                 if (!pdata->dvs_gpio[i]) {
 591                         dev_warn(dev, "there is no dvs%d gpio\n", i);
 592                         continue;
 593                 }
 594
 595                 tmp = i ? RK808_DVS2_POL : RK808_DVS1_POL;
 596                 ret = regmap_update_bits(map, RK808_IO_POL_REG, tmp,
 597                                 gpiod_is_active_low(pdata->dvs_gpio[i]) ?
 598                                 0 : tmp);
 599         }
 600
 601 dt_parse_end:
 602         of_node_put(np);
 603         return ret;
 604 }
 605
 606 static int rk808_regulator_probe(struct platform_device *pdev)
 607 {
 608         struct rk808 *rk808 = dev_get_drvdata(pdev->dev.parent);
 609         struct i2c_client *client = rk808->i2c;
 610         struct regulator_config config = {};
 611         struct regulator_dev *rk808_rdev;
 612         struct rk808_regulator_data *pdata;
 613         const struct regulator_desc *regulators;
 614         int ret, i, nregulators;
 615
 616         pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
 617         if (!pdata)
 618                 return -ENOMEM;
 619
 620         ret = rk808_regulator_dt_parse_pdata(&pdev->dev, &client->dev,
 621                                              rk808->regmap, pdata);
 622         if (ret < 0)
 623                 return ret;
 624
 625         platform_set_drvdata(pdev, pdata);
 626
 627         switch (rk808->variant) {
 628         case RK808_ID:
 629                 regulators = rk808_reg;
 630                 nregulators = RK808_NUM_REGULATORS;
 631                 break;
 632         case RK818_ID:
 633                 regulators = rk818_reg;
 634                 nregulators = RK818_NUM_REGULATORS;
 635                 break;
 636         default:
 637                 dev_err(&client->dev, "unsupported RK8XX ID %lu\n",
 638                         rk808->variant);
 639                 return -EINVAL;
 640         }
 641
 642         config.dev = &client->dev;
 643         config.driver_data = pdata;
 644         config.regmap = rk808->regmap;
 645
 646         /* Instantiate the regulators */
 647         for (i = 0; i < nregulators; i++) {
 648                 rk808_rdev = devm_regulator_register(&pdev->dev,
 649                                                      &regulators[i], &config);
 650                 if (IS_ERR(rk808_rdev)) {
 651                         dev_err(&client->dev,
 652                                 "failed to register %d regulator\n", i);
 653                         return PTR_ERR(rk808_rdev);
 654                 }
 655         }
 656
 657         return 0;
 658 }
 659
 660 static struct platform_driver rk808_regulator_driver = {
 661         .probe = rk808_regulator_probe,
 662         .driver = {
 663                 .name = "rk808-regulator"
 664         },
 665 };
 666
 667 module_platform_driver(rk808_regulator_driver);
 668
 669 MODULE_DESCRIPTION("regulator driver for the RK808/RK818 series PMICs");
 670 MODULE_AUTHOR("Chris Zhong <zyw@rock-chips.com>");
 671 MODULE_AUTHOR("Zhang Qing <zhangqing@rock-chips.com>");
 672 MODULE_AUTHOR("Wadim Egorov <w.egorov@phytec.de>");
 673 MODULE_LICENSE("GPL");
 674 MODULE_ALIAS("platform:rk808-regulator");