drivers/regulator/rk808-regulator.c

   1 /*
   2  * Regulator driver for Rockchip RK805/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 RK805_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            = &rk805_reg_ops,                       \
  87         }
  88
  89 #define RK8XX_DESC(_id, _match, _supply, _min, _max, _step, _vreg,      \
  90         _vmask, _ereg, _emask, _etime)                                  \
  91         [_id] = {                                                       \
  92                 .name           = (_match),                             \
  93                 .supply_name    = (_supply),                            \
  94                 .of_match       = of_match_ptr(_match),                 \
  95                 .regulators_node = of_match_ptr("regulators"),          \
  96                 .type           = REGULATOR_VOLTAGE,                    \
  97                 .id             = (_id),                                \
  98                 .n_voltages     = (((_max) - (_min)) / (_step) + 1),    \
  99                 .owner          = THIS_MODULE,                          \
 100                 .min_uV         = (_min) * 1000,                        \
 101                 .uV_step        = (_step) * 1000,                       \
 102                 .vsel_reg       = (_vreg),                              \
 103                 .vsel_mask      = (_vmask),                             \
 104                 .enable_reg     = (_ereg),                              \
 105                 .enable_mask    = (_emask),                             \
 106                 .enable_time    = (_etime),                             \
 107                 .ops            = &rk808_reg_ops,                       \
 108         }
 109
 110 #define RK8XX_DESC_SWITCH(_id, _match, _supply, _ereg, _emask)          \
 111         [_id] = {                                                       \
 112                 .name           = (_match),                             \
 113                 .supply_name    = (_supply),                            \
 114                 .of_match       = of_match_ptr(_match),                 \
 115                 .regulators_node = of_match_ptr("regulators"),          \
 116                 .type           = REGULATOR_VOLTAGE,                    \
 117                 .id             = (_id),                                \
 118                 .enable_reg     = (_ereg),                              \
 119                 .enable_mask    = (_emask),                             \
 120                 .owner          = THIS_MODULE,                          \
 121                 .ops            = &rk808_switch_ops                     \
 122         }
 123
 124
 125 struct rk808_regulator_data {
 126         struct gpio_desc *dvs_gpio[2];
 127 };
 128
 129 static const int rk808_buck_config_regs[] = {
 130         RK808_BUCK1_CONFIG_REG,
 131         RK808_BUCK2_CONFIG_REG,
 132         RK808_BUCK3_CONFIG_REG,
 133         RK808_BUCK4_CONFIG_REG,
 134 };
 135
 136 static const struct regulator_linear_range rk808_ldo3_voltage_ranges[] = {
 137         REGULATOR_LINEAR_RANGE(800000, 0, 13, 100000),
 138         REGULATOR_LINEAR_RANGE(2500000, 15, 15, 0),
 139 };
 140
 141 static int rk808_buck1_2_get_voltage_sel_regmap(struct regulator_dev *rdev)
 142 {
 143         struct rk808_regulator_data *pdata = rdev_get_drvdata(rdev);
 144         int id = rdev_get_id(rdev);
 145         struct gpio_desc *gpio = pdata->dvs_gpio[id];
 146         unsigned int val;
 147         int ret;
 148
 149         if (!gpio || gpiod_get_value(gpio) == 0)
 150                 return regulator_get_voltage_sel_regmap(rdev);
 151
 152         ret = regmap_read(rdev->regmap,
 153                           rdev->desc->vsel_reg + RK808_DVS_REG_OFFSET,
 154                           &val);
 155         if (ret != 0)
 156                 return ret;
 157
 158         val &= rdev->desc->vsel_mask;
 159         val >>= ffs(rdev->desc->vsel_mask) - 1;
 160
 161         return val;
 162 }
 163
 164 static int rk808_buck1_2_i2c_set_voltage_sel(struct regulator_dev *rdev,
 165                                              unsigned sel)
 166 {
 167         int ret, delta_sel;
 168         unsigned int old_sel, tmp, val, mask = rdev->desc->vsel_mask;
 169
 170         ret = regmap_read(rdev->regmap, rdev->desc->vsel_reg, &val);
 171         if (ret != 0)
 172                 return ret;
 173
 174         tmp = val & ~mask;
 175         old_sel = val & mask;
 176         old_sel >>= ffs(mask) - 1;
 177         delta_sel = sel - old_sel;
 178
 179         /*
 180          * If directly modify the register to change the voltage, we will face
 181          * the risk of overshoot. Put it into a multi-step, can effectively
 182          * avoid this problem, a step is 100mv here.
 183          */
 184         while (delta_sel > MAX_STEPS_ONE_TIME) {
 185                 old_sel += MAX_STEPS_ONE_TIME;
 186                 val = old_sel << (ffs(mask) - 1);
 187                 val |= tmp;
 188
 189                 /*
 190                  * i2c is 400kHz (2.5us per bit) and we must transmit _at least_
 191                  * 3 bytes (24 bits) plus start and stop so 26 bits.  So we've
 192                  * got more than 65 us between each voltage change and thus
 193                  * won't ramp faster than ~1500 uV / us.
 194                  */
 195                 ret = regmap_write(rdev->regmap, rdev->desc->vsel_reg, val);
 196                 delta_sel = sel - old_sel;
 197         }
 198
 199         sel <<= ffs(mask) - 1;
 200         val = tmp | sel;
 201         ret = regmap_write(rdev->regmap, rdev->desc->vsel_reg, val);
 202
 203         /*
 204          * When we change the voltage register directly, the ramp rate is about
 205          * 100000uv/us, wait 1us to make sure the target voltage to be stable,
 206          * so we needn't wait extra time after that.
 207          */
 208         udelay(1);
 209
 210         return ret;
 211 }
 212
 213 static int rk808_buck1_2_set_voltage_sel(struct regulator_dev *rdev,
 214                                          unsigned sel)
 215 {
 216         struct rk808_regulator_data *pdata = rdev_get_drvdata(rdev);
 217         int id = rdev_get_id(rdev);
 218         struct gpio_desc *gpio = pdata->dvs_gpio[id];
 219         unsigned int reg = rdev->desc->vsel_reg;
 220         unsigned old_sel;
 221         int ret, gpio_level;
 222
 223         if (!gpio)
 224                 return rk808_buck1_2_i2c_set_voltage_sel(rdev, sel);
 225
 226         gpio_level = gpiod_get_value(gpio);
 227         if (gpio_level == 0) {
 228                 reg += RK808_DVS_REG_OFFSET;
 229                 ret = regmap_read(rdev->regmap, rdev->desc->vsel_reg, &old_sel);
 230         } else {
 231                 ret = regmap_read(rdev->regmap,
 232                                   reg + RK808_DVS_REG_OFFSET,
 233                                   &old_sel);
 234         }
 235
 236         if (ret != 0)
 237                 return ret;
 238
 239         sel <<= ffs(rdev->desc->vsel_mask) - 1;
 240         sel |= old_sel & ~rdev->desc->vsel_mask;
 241
 242         ret = regmap_write(rdev->regmap, reg, sel);
 243         if (ret)
 244                 return ret;
 245
 246         gpiod_set_value(gpio, !gpio_level);
 247
 248         return ret;
 249 }
 250
 251 static int rk808_buck1_2_set_voltage_time_sel(struct regulator_dev *rdev,
 252                                        unsigned int old_selector,
 253                                        unsigned int new_selector)
 254 {
 255         struct rk808_regulator_data *pdata = rdev_get_drvdata(rdev);
 256         int id = rdev_get_id(rdev);
 257         struct gpio_desc *gpio = pdata->dvs_gpio[id];
 258
 259         /* if there is no dvs1/2 pin, we don't need wait extra time here. */
 260         if (!gpio)
 261                 return 0;
 262
 263         return regulator_set_voltage_time_sel(rdev, old_selector, new_selector);
 264 }
 265
 266 static int rk808_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
 267 {
 268         unsigned int ramp_value = RK808_RAMP_RATE_10MV_PER_US;
 269         unsigned int reg = rk808_buck_config_regs[rdev_get_id(rdev)];
 270
 271         switch (ramp_delay) {
 272         case 1 ... 2000:
 273                 ramp_value = RK808_RAMP_RATE_2MV_PER_US;
 274                 break;
 275         case 2001 ... 4000:
 276                 ramp_value = RK808_RAMP_RATE_4MV_PER_US;
 277                 break;
 278         case 4001 ... 6000:
 279                 ramp_value = RK808_RAMP_RATE_6MV_PER_US;
 280                 break;
 281         case 6001 ... 10000:
 282                 break;
 283         default:
 284                 pr_warn("%s ramp_delay: %d not supported, setting 10000\n",
 285                         rdev->desc->name, ramp_delay);
 286         }
 287
 288         return regmap_update_bits(rdev->regmap, reg,
 289                                   RK808_RAMP_RATE_MASK, ramp_value);
 290 }
 291
 292 static int rk808_set_suspend_voltage(struct regulator_dev *rdev, int uv)
 293 {
 294         unsigned int reg;
 295         int sel = regulator_map_voltage_linear(rdev, uv, uv);
 296
 297         if (sel < 0)
 298                 return -EINVAL;
 299
 300         reg = rdev->desc->vsel_reg + RK808_SLP_REG_OFFSET;
 301
 302         return regmap_update_bits(rdev->regmap, reg,
 303                                   rdev->desc->vsel_mask,
 304                                   sel);
 305 }
 306
 307 static int rk808_set_suspend_voltage_range(struct regulator_dev *rdev, int uv)
 308 {
 309         unsigned int reg;
 310         int sel = regulator_map_voltage_linear_range(rdev, uv, uv);
 311
 312         if (sel < 0)
 313                 return -EINVAL;
 314
 315         reg = rdev->desc->vsel_reg + RK808_SLP_REG_OFFSET;
 316
 317         return regmap_update_bits(rdev->regmap, reg,
 318                                   rdev->desc->vsel_mask,
 319                                   sel);
 320 }
 321
 322 static int rk805_set_suspend_enable(struct regulator_dev *rdev)
 323 {
 324         unsigned int reg;
 325
 326         reg = rdev->desc->enable_reg + RK808_SLP_SET_OFF_REG_OFFSET;
 327
 328         return regmap_update_bits(rdev->regmap, reg,
 329                                   rdev->desc->enable_mask,
 330                                   rdev->desc->enable_mask);
 331 }
 332
 333 static int rk805_set_suspend_disable(struct regulator_dev *rdev)
 334 {
 335         unsigned int reg;
 336
 337         reg = rdev->desc->enable_reg + RK808_SLP_SET_OFF_REG_OFFSET;
 338
 339         return regmap_update_bits(rdev->regmap, reg,
 340                                   rdev->desc->enable_mask,
 341                                   0);
 342 }
 343
 344 static int rk808_set_suspend_enable(struct regulator_dev *rdev)
 345 {
 346         unsigned int reg;
 347
 348         reg = rdev->desc->enable_reg + RK808_SLP_SET_OFF_REG_OFFSET;
 349
 350         return regmap_update_bits(rdev->regmap, reg,
 351                                   rdev->desc->enable_mask,
 352                                   0);
 353 }
 354
 355 static int rk808_set_suspend_disable(struct regulator_dev *rdev)
 356 {
 357         unsigned int reg;
 358
 359         reg = rdev->desc->enable_reg + RK808_SLP_SET_OFF_REG_OFFSET;
 360
 361         return regmap_update_bits(rdev->regmap, reg,
 362                                   rdev->desc->enable_mask,
 363                                   rdev->desc->enable_mask);
 364 }
 365
 366 static const struct regulator_ops rk805_reg_ops = {
 367         .list_voltage           = regulator_list_voltage_linear,
 368         .map_voltage            = regulator_map_voltage_linear,
 369         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 370         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 371         .enable                 = regulator_enable_regmap,
 372         .disable                = regulator_disable_regmap,
 373         .is_enabled             = regulator_is_enabled_regmap,
 374         .set_suspend_voltage    = rk808_set_suspend_voltage,
 375         .set_suspend_enable     = rk805_set_suspend_enable,
 376         .set_suspend_disable    = rk805_set_suspend_disable,
 377 };
 378
 379 static const struct regulator_ops rk805_switch_ops = {
 380         .enable                 = regulator_enable_regmap,
 381         .disable                = regulator_disable_regmap,
 382         .is_enabled             = regulator_is_enabled_regmap,
 383         .set_suspend_enable     = rk805_set_suspend_enable,
 384         .set_suspend_disable    = rk805_set_suspend_disable,
 385 };
 386
 387 static const struct regulator_ops rk808_buck1_2_ops = {
 388         .list_voltage           = regulator_list_voltage_linear,
 389         .map_voltage            = regulator_map_voltage_linear,
 390         .get_voltage_sel        = rk808_buck1_2_get_voltage_sel_regmap,
 391         .set_voltage_sel        = rk808_buck1_2_set_voltage_sel,
 392         .set_voltage_time_sel   = rk808_buck1_2_set_voltage_time_sel,
 393         .enable                 = regulator_enable_regmap,
 394         .disable                = regulator_disable_regmap,
 395         .is_enabled             = regulator_is_enabled_regmap,
 396         .set_ramp_delay         = rk808_set_ramp_delay,
 397         .set_suspend_voltage    = rk808_set_suspend_voltage,
 398         .set_suspend_enable     = rk808_set_suspend_enable,
 399         .set_suspend_disable    = rk808_set_suspend_disable,
 400 };
 401
 402 static const struct regulator_ops rk808_reg_ops = {
 403         .list_voltage           = regulator_list_voltage_linear,
 404         .map_voltage            = regulator_map_voltage_linear,
 405         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 406         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 407         .enable                 = regulator_enable_regmap,
 408         .disable                = regulator_disable_regmap,
 409         .is_enabled             = regulator_is_enabled_regmap,
 410         .set_suspend_voltage    = rk808_set_suspend_voltage,
 411         .set_suspend_enable     = rk808_set_suspend_enable,
 412         .set_suspend_disable    = rk808_set_suspend_disable,
 413 };
 414
 415 static const struct regulator_ops rk808_reg_ops_ranges = {
 416         .list_voltage           = regulator_list_voltage_linear_range,
 417         .map_voltage            = regulator_map_voltage_linear_range,
 418         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 419         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 420         .enable                 = regulator_enable_regmap,
 421         .disable                = regulator_disable_regmap,
 422         .is_enabled             = regulator_is_enabled_regmap,
 423         .set_suspend_voltage    = rk808_set_suspend_voltage_range,
 424         .set_suspend_enable     = rk808_set_suspend_enable,
 425         .set_suspend_disable    = rk808_set_suspend_disable,
 426 };
 427
 428 static const struct regulator_ops rk808_switch_ops = {
 429         .enable                 = regulator_enable_regmap,
 430         .disable                = regulator_disable_regmap,
 431         .is_enabled             = regulator_is_enabled_regmap,
 432         .set_suspend_enable     = rk808_set_suspend_enable,
 433         .set_suspend_disable    = rk808_set_suspend_disable,
 434 };
 435
 436 static const struct regulator_linear_range rk805_buck_1_2_voltage_ranges[] = {
 437         REGULATOR_LINEAR_RANGE(712500, 0, 59, 12500),
 438         REGULATOR_LINEAR_RANGE(1800000, 60, 62, 200000),
 439         REGULATOR_LINEAR_RANGE(2300000, 63, 63, 0),
 440 };
 441
 442 static const struct regulator_desc rk805_reg[] = {
 443         {
 444                 .name = "DCDC_REG1",
 445                 .supply_name = "vcc1",
 446                 .of_match = of_match_ptr("DCDC_REG1"),
 447                 .regulators_node = of_match_ptr("regulators"),
 448                 .id = RK805_ID_DCDC1,
 449                 .ops = &rk808_reg_ops_ranges,
 450                 .type = REGULATOR_VOLTAGE,
 451                 .n_voltages = 64,
 452                 .linear_ranges = rk805_buck_1_2_voltage_ranges,
 453                 .n_linear_ranges = ARRAY_SIZE(rk805_buck_1_2_voltage_ranges),
 454                 .vsel_reg = RK805_BUCK1_ON_VSEL_REG,
 455                 .vsel_mask = RK818_BUCK_VSEL_MASK,
 456                 .enable_reg = RK805_DCDC_EN_REG,
 457                 .enable_mask = BIT(0),
 458                 .owner = THIS_MODULE,
 459         }, {
 460                 .name = "DCDC_REG2",
 461                 .supply_name = "vcc2",
 462                 .of_match = of_match_ptr("DCDC_REG2"),
 463                 .regulators_node = of_match_ptr("regulators"),
 464                 .id = RK805_ID_DCDC2,
 465                 .ops = &rk808_reg_ops_ranges,
 466                 .type = REGULATOR_VOLTAGE,
 467                 .n_voltages = 64,
 468                 .linear_ranges = rk805_buck_1_2_voltage_ranges,
 469                 .n_linear_ranges = ARRAY_SIZE(rk805_buck_1_2_voltage_ranges),
 470                 .vsel_reg = RK805_BUCK2_ON_VSEL_REG,
 471                 .vsel_mask = RK818_BUCK_VSEL_MASK,
 472                 .enable_reg = RK805_DCDC_EN_REG,
 473                 .enable_mask = BIT(1),
 474                 .owner = THIS_MODULE,
 475         }, {
 476                 .name = "DCDC_REG3",
 477                 .supply_name = "vcc3",
 478                 .of_match = of_match_ptr("DCDC_REG3"),
 479                 .regulators_node = of_match_ptr("regulators"),
 480                 .id = RK805_ID_DCDC3,
 481                 .ops = &rk805_switch_ops,
 482                 .type = REGULATOR_VOLTAGE,
 483                 .n_voltages = 1,
 484                 .enable_reg = RK805_DCDC_EN_REG,
 485                 .enable_mask = BIT(2),
 486                 .owner = THIS_MODULE,
 487         },
 488
 489         RK805_DESC(RK805_ID_DCDC4, "DCDC_REG4", "vcc4", 800, 3400, 100,
 490                 RK805_BUCK4_ON_VSEL_REG, RK818_BUCK4_VSEL_MASK,
 491                 RK805_DCDC_EN_REG, BIT(3), 0),
 492
 493         RK805_DESC(RK805_ID_LDO1, "LDO_REG1", "vcc5", 800, 3400, 100,
 494                 RK805_LDO1_ON_VSEL_REG, RK818_LDO_VSEL_MASK, RK805_LDO_EN_REG,
 495                 BIT(0), 400),
 496         RK805_DESC(RK805_ID_LDO2, "LDO_REG2", "vcc5", 800, 3400, 100,
 497                 RK805_LDO2_ON_VSEL_REG, RK818_LDO_VSEL_MASK, RK805_LDO_EN_REG,
 498                 BIT(1), 400),
 499         RK805_DESC(RK805_ID_LDO3, "LDO_REG3", "vcc6", 800, 3400, 100,
 500                 RK805_LDO3_ON_VSEL_REG, RK818_LDO_VSEL_MASK, RK805_LDO_EN_REG,
 501                 BIT(2), 400),
 502 };
 503
 504 static const struct regulator_desc rk808_reg[] = {
 505         {
 506                 .name = "DCDC_REG1",
 507                 .supply_name = "vcc1",
 508                 .of_match = of_match_ptr("DCDC_REG1"),
 509                 .regulators_node = of_match_ptr("regulators"),
 510                 .id = RK808_ID_DCDC1,
 511                 .ops = &rk808_buck1_2_ops,
 512                 .type = REGULATOR_VOLTAGE,
 513                 .min_uV = 712500,
 514                 .uV_step = 12500,
 515                 .n_voltages = 64,
 516                 .vsel_reg = RK808_BUCK1_ON_VSEL_REG,
 517                 .vsel_mask = RK808_BUCK_VSEL_MASK,
 518                 .enable_reg = RK808_DCDC_EN_REG,
 519                 .enable_mask = BIT(0),
 520                 .owner = THIS_MODULE,
 521         }, {
 522                 .name = "DCDC_REG2",
 523                 .supply_name = "vcc2",
 524                 .of_match = of_match_ptr("DCDC_REG2"),
 525                 .regulators_node = of_match_ptr("regulators"),
 526                 .id = RK808_ID_DCDC2,
 527                 .ops = &rk808_buck1_2_ops,
 528                 .type = REGULATOR_VOLTAGE,
 529                 .min_uV = 712500,
 530                 .uV_step = 12500,
 531                 .n_voltages = 64,
 532                 .vsel_reg = RK808_BUCK2_ON_VSEL_REG,
 533                 .vsel_mask = RK808_BUCK_VSEL_MASK,
 534                 .enable_reg = RK808_DCDC_EN_REG,
 535                 .enable_mask = BIT(1),
 536                 .owner = THIS_MODULE,
 537         }, {
 538                 .name = "DCDC_REG3",
 539                 .supply_name = "vcc3",
 540                 .of_match = of_match_ptr("DCDC_REG3"),
 541                 .regulators_node = of_match_ptr("regulators"),
 542                 .id = RK808_ID_DCDC3,
 543                 .ops = &rk808_switch_ops,
 544                 .type = REGULATOR_VOLTAGE,
 545                 .n_voltages = 1,
 546                 .enable_reg = RK808_DCDC_EN_REG,
 547                 .enable_mask = BIT(2),
 548                 .owner = THIS_MODULE,
 549         },
 550         RK8XX_DESC(RK808_ID_DCDC4, "DCDC_REG4", "vcc4", 1800, 3300, 100,
 551                 RK808_BUCK4_ON_VSEL_REG, RK808_BUCK4_VSEL_MASK,
 552                 RK808_DCDC_EN_REG, BIT(3), 0),
 553         RK8XX_DESC(RK808_ID_LDO1, "LDO_REG1", "vcc6", 1800, 3400, 100,
 554                 RK808_LDO1_ON_VSEL_REG, RK808_LDO_VSEL_MASK, RK808_LDO_EN_REG,
 555                 BIT(0), 400),
 556         RK8XX_DESC(RK808_ID_LDO2, "LDO_REG2", "vcc6", 1800, 3400, 100,
 557                 RK808_LDO2_ON_VSEL_REG, RK808_LDO_VSEL_MASK, RK808_LDO_EN_REG,
 558                 BIT(1), 400),
 559         {
 560                 .name = "LDO_REG3",
 561                 .supply_name = "vcc7",
 562                 .of_match = of_match_ptr("LDO_REG3"),
 563                 .regulators_node = of_match_ptr("regulators"),
 564                 .id = RK808_ID_LDO3,
 565                 .ops = &rk808_reg_ops_ranges,
 566                 .type = REGULATOR_VOLTAGE,
 567                 .n_voltages = 16,
 568                 .linear_ranges = rk808_ldo3_voltage_ranges,
 569                 .n_linear_ranges = ARRAY_SIZE(rk808_ldo3_voltage_ranges),
 570                 .vsel_reg = RK808_LDO3_ON_VSEL_REG,
 571                 .vsel_mask = RK808_BUCK4_VSEL_MASK,
 572                 .enable_reg = RK808_LDO_EN_REG,
 573                 .enable_mask = BIT(2),
 574                 .enable_time = 400,
 575                 .owner = THIS_MODULE,
 576         },
 577         RK8XX_DESC(RK808_ID_LDO4, "LDO_REG4", "vcc9", 1800, 3400, 100,
 578                 RK808_LDO4_ON_VSEL_REG, RK808_LDO_VSEL_MASK, RK808_LDO_EN_REG,
 579                 BIT(3), 400),
 580         RK8XX_DESC(RK808_ID_LDO5, "LDO_REG5", "vcc9", 1800, 3400, 100,
 581                 RK808_LDO5_ON_VSEL_REG, RK808_LDO_VSEL_MASK, RK808_LDO_EN_REG,
 582                 BIT(4), 400),
 583         RK8XX_DESC(RK808_ID_LDO6, "LDO_REG6", "vcc10", 800, 2500, 100,
 584                 RK808_LDO6_ON_VSEL_REG, RK808_LDO_VSEL_MASK, RK808_LDO_EN_REG,
 585                 BIT(5), 400),
 586         RK8XX_DESC(RK808_ID_LDO7, "LDO_REG7", "vcc7", 800, 2500, 100,
 587                 RK808_LDO7_ON_VSEL_REG, RK808_LDO_VSEL_MASK, RK808_LDO_EN_REG,
 588                 BIT(6), 400),
 589         RK8XX_DESC(RK808_ID_LDO8, "LDO_REG8", "vcc11", 1800, 3400, 100,
 590                 RK808_LDO8_ON_VSEL_REG, RK808_LDO_VSEL_MASK, RK808_LDO_EN_REG,
 591                 BIT(7), 400),
 592         RK8XX_DESC_SWITCH(RK808_ID_SWITCH1, "SWITCH_REG1", "vcc8",
 593                 RK808_DCDC_EN_REG, BIT(5)),
 594         RK8XX_DESC_SWITCH(RK808_ID_SWITCH2, "SWITCH_REG2", "vcc12",
 595                 RK808_DCDC_EN_REG, BIT(6)),
 596 };
 597
 598 static const struct regulator_desc rk818_reg[] = {
 599         {
 600                 .name = "DCDC_REG1",
 601                 .supply_name = "vcc1",
 602                 .of_match = of_match_ptr("DCDC_REG1"),
 603                 .regulators_node = of_match_ptr("regulators"),
 604                 .id = RK818_ID_DCDC1,
 605                 .ops = &rk808_reg_ops,
 606                 .type = REGULATOR_VOLTAGE,
 607                 .min_uV = 712500,
 608                 .uV_step = 12500,
 609                 .n_voltages = 64,
 610                 .vsel_reg = RK818_BUCK1_ON_VSEL_REG,
 611                 .vsel_mask = RK818_BUCK_VSEL_MASK,
 612                 .enable_reg = RK818_DCDC_EN_REG,
 613                 .enable_mask = BIT(0),
 614                 .owner = THIS_MODULE,
 615         }, {
 616                 .name = "DCDC_REG2",
 617                 .supply_name = "vcc2",
 618                 .of_match = of_match_ptr("DCDC_REG2"),
 619                 .regulators_node = of_match_ptr("regulators"),
 620                 .id = RK818_ID_DCDC2,
 621                 .ops = &rk808_reg_ops,
 622                 .type = REGULATOR_VOLTAGE,
 623                 .min_uV = 712500,
 624                 .uV_step = 12500,
 625                 .n_voltages = 64,
 626                 .vsel_reg = RK818_BUCK2_ON_VSEL_REG,
 627                 .vsel_mask = RK818_BUCK_VSEL_MASK,
 628                 .enable_reg = RK818_DCDC_EN_REG,
 629                 .enable_mask = BIT(1),
 630                 .owner = THIS_MODULE,
 631         }, {
 632                 .name = "DCDC_REG3",
 633                 .supply_name = "vcc3",
 634                 .of_match = of_match_ptr("DCDC_REG3"),
 635                 .regulators_node = of_match_ptr("regulators"),
 636                 .id = RK818_ID_DCDC3,
 637                 .ops = &rk808_switch_ops,
 638                 .type = REGULATOR_VOLTAGE,
 639                 .n_voltages = 1,
 640                 .enable_reg = RK818_DCDC_EN_REG,
 641                 .enable_mask = BIT(2),
 642                 .owner = THIS_MODULE,
 643         },
 644         RK8XX_DESC(RK818_ID_DCDC4, "DCDC_REG4", "vcc4", 1800, 3600, 100,
 645                 RK818_BUCK4_ON_VSEL_REG, RK818_BUCK4_VSEL_MASK,
 646                 RK818_DCDC_EN_REG, BIT(3), 0),
 647         RK8XX_DESC(RK818_ID_BOOST, "DCDC_BOOST", "boost", 4700, 5400, 100,
 648                 RK818_BOOST_LDO9_ON_VSEL_REG, RK818_BOOST_ON_VSEL_MASK,
 649                 RK818_DCDC_EN_REG, BIT(4), 0),
 650         RK8XX_DESC(RK818_ID_LDO1, "LDO_REG1", "vcc6", 1800, 3400, 100,
 651                 RK818_LDO1_ON_VSEL_REG, RK818_LDO_VSEL_MASK, RK818_LDO_EN_REG,
 652                 BIT(0), 400),
 653         RK8XX_DESC(RK818_ID_LDO2, "LDO_REG2", "vcc6", 1800, 3400, 100,
 654                 RK818_LDO2_ON_VSEL_REG, RK818_LDO_VSEL_MASK, RK818_LDO_EN_REG,
 655                 BIT(1), 400),
 656         {
 657                 .name = "LDO_REG3",
 658                 .supply_name = "vcc7",
 659                 .of_match = of_match_ptr("LDO_REG3"),
 660                 .regulators_node = of_match_ptr("regulators"),
 661                 .id = RK818_ID_LDO3,
 662                 .ops = &rk808_reg_ops_ranges,
 663                 .type = REGULATOR_VOLTAGE,
 664                 .n_voltages = 16,
 665                 .linear_ranges = rk808_ldo3_voltage_ranges,
 666                 .n_linear_ranges = ARRAY_SIZE(rk808_ldo3_voltage_ranges),
 667                 .vsel_reg = RK818_LDO3_ON_VSEL_REG,
 668                 .vsel_mask = RK818_LDO3_ON_VSEL_MASK,
 669                 .enable_reg = RK818_LDO_EN_REG,
 670                 .enable_mask = BIT(2),
 671                 .enable_time = 400,
 672                 .owner = THIS_MODULE,
 673         },
 674         RK8XX_DESC(RK818_ID_LDO4, "LDO_REG4", "vcc8", 1800, 3400, 100,
 675                 RK818_LDO4_ON_VSEL_REG, RK818_LDO_VSEL_MASK, RK818_LDO_EN_REG,
 676                 BIT(3), 400),
 677         RK8XX_DESC(RK818_ID_LDO5, "LDO_REG5", "vcc7", 1800, 3400, 100,
 678                 RK818_LDO5_ON_VSEL_REG, RK818_LDO_VSEL_MASK, RK818_LDO_EN_REG,
 679                 BIT(4), 400),
 680         RK8XX_DESC(RK818_ID_LDO6, "LDO_REG6", "vcc8", 800, 2500, 100,
 681                 RK818_LDO6_ON_VSEL_REG, RK818_LDO_VSEL_MASK, RK818_LDO_EN_REG,
 682                 BIT(5), 400),
 683         RK8XX_DESC(RK818_ID_LDO7, "LDO_REG7", "vcc7", 800, 2500, 100,
 684                 RK818_LDO7_ON_VSEL_REG, RK818_LDO_VSEL_MASK, RK818_LDO_EN_REG,
 685                 BIT(6), 400),
 686         RK8XX_DESC(RK818_ID_LDO8, "LDO_REG8", "vcc8", 1800, 3400, 100,
 687                 RK818_LDO8_ON_VSEL_REG, RK818_LDO_VSEL_MASK, RK818_LDO_EN_REG,
 688                 BIT(7), 400),
 689         RK8XX_DESC(RK818_ID_LDO9, "LDO_REG9", "vcc9", 1800, 3400, 100,
 690                 RK818_BOOST_LDO9_ON_VSEL_REG, RK818_LDO_VSEL_MASK,
 691                 RK818_DCDC_EN_REG, BIT(5), 400),
 692         RK8XX_DESC_SWITCH(RK818_ID_SWITCH, "SWITCH_REG", "vcc9",
 693                 RK818_DCDC_EN_REG, BIT(6)),
 694         RK8XX_DESC_SWITCH(RK818_ID_HDMI_SWITCH, "HDMI_SWITCH", "h_5v",
 695                 RK818_H5V_EN_REG, BIT(0)),
 696         RK8XX_DESC_SWITCH(RK818_ID_OTG_SWITCH, "OTG_SWITCH", "usb",
 697                 RK818_DCDC_EN_REG, BIT(7)),
 698 };
 699
 700 static int rk808_regulator_dt_parse_pdata(struct device *dev,
 701                                    struct device *client_dev,
 702                                    struct regmap *map,
 703                                    struct rk808_regulator_data *pdata)
 704 {
 705         struct device_node *np;
 706         int tmp, ret = 0, i;
 707
 708         np = of_get_child_by_name(client_dev->of_node, "regulators");
 709         if (!np)
 710                 return -ENXIO;
 711
 712         for (i = 0; i < ARRAY_SIZE(pdata->dvs_gpio); i++) {
 713                 pdata->dvs_gpio[i] =
 714                         devm_gpiod_get_index_optional(client_dev, "dvs", i,
 715                                                       GPIOD_OUT_LOW);
 716                 if (IS_ERR(pdata->dvs_gpio[i])) {
 717                         ret = PTR_ERR(pdata->dvs_gpio[i]);
 718                         dev_err(dev, "failed to get dvs%d gpio (%d)\n", i, ret);
 719                         goto dt_parse_end;
 720                 }
 721
 722                 if (!pdata->dvs_gpio[i]) {
 723                         dev_warn(dev, "there is no dvs%d gpio\n", i);
 724                         continue;
 725                 }
 726
 727                 tmp = i ? RK808_DVS2_POL : RK808_DVS1_POL;
 728                 ret = regmap_update_bits(map, RK808_IO_POL_REG, tmp,
 729                                 gpiod_is_active_low(pdata->dvs_gpio[i]) ?
 730                                 0 : tmp);
 731         }
 732
 733 dt_parse_end:
 734         of_node_put(np);
 735         return ret;
 736 }
 737
 738 static int rk808_regulator_probe(struct platform_device *pdev)
 739 {
 740         struct rk808 *rk808 = dev_get_drvdata(pdev->dev.parent);
 741         struct i2c_client *client = rk808->i2c;
 742         struct regulator_config config = {};
 743         struct regulator_dev *rk808_rdev;
 744         struct rk808_regulator_data *pdata;
 745         const struct regulator_desc *regulators;
 746         int ret, i, nregulators;
 747
 748         pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
 749         if (!pdata)
 750                 return -ENOMEM;
 751
 752         ret = rk808_regulator_dt_parse_pdata(&pdev->dev, &client->dev,
 753                                              rk808->regmap, pdata);
 754         if (ret < 0)
 755                 return ret;
 756
 757         platform_set_drvdata(pdev, pdata);
 758
 759         switch (rk808->variant) {
 760         case RK805_ID:
 761                 regulators = rk805_reg;
 762                 nregulators = RK805_NUM_REGULATORS;
 763                 break;
 764         case RK808_ID:
 765                 regulators = rk808_reg;
 766                 nregulators = RK808_NUM_REGULATORS;
 767                 break;
 768         case RK818_ID:
 769                 regulators = rk818_reg;
 770                 nregulators = RK818_NUM_REGULATORS;
 771                 break;
 772         default:
 773                 dev_err(&client->dev, "unsupported RK8XX ID %lu\n",
 774                         rk808->variant);
 775                 return -EINVAL;
 776         }
 777
 778         config.dev = &client->dev;
 779         config.driver_data = pdata;
 780         config.regmap = rk808->regmap;
 781
 782         /* Instantiate the regulators */
 783         for (i = 0; i < nregulators; i++) {
 784                 rk808_rdev = devm_regulator_register(&pdev->dev,
 785                                                      &regulators[i], &config);
 786                 if (IS_ERR(rk808_rdev)) {
 787                         dev_err(&client->dev,
 788                                 "failed to register %d regulator\n", i);
 789                         return PTR_ERR(rk808_rdev);
 790                 }
 791         }
 792
 793         return 0;
 794 }
 795
 796 static struct platform_driver rk808_regulator_driver = {
 797         .probe = rk808_regulator_probe,
 798         .driver = {
 799                 .name = "rk808-regulator"
 800         },
 801 };
 802
 803 module_platform_driver(rk808_regulator_driver);
 804
 805 MODULE_DESCRIPTION("regulator driver for the RK805/RK808/RK818 series PMICs");
 806 MODULE_AUTHOR("Chris Zhong <zyw@rock-chips.com>");
 807 MODULE_AUTHOR("Zhang Qing <zhangqing@rock-chips.com>");
 808 MODULE_AUTHOR("Wadim Egorov <w.egorov@phytec.de>");
 809 MODULE_LICENSE("GPL");
 810 MODULE_ALIAS("platform:rk808-regulator");