drivers/regulator/rk808-regulator.c

   1 /*
   2  * Regulator driver for Rockchip RK808
   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  * This program is free software; you can redistribute it and/or modify it
  10  * under the terms and conditions of the GNU General Public License,
  11  * version 2, as published by the Free Software Foundation.
  12  *
  13  * This program is distributed in the hope it will be useful, but WITHOUT
  14  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  15  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  16  * more details.
  17  */
  18
  19 #include <linux/module.h>
  20 #include <linux/i2c.h>
  21 #include <linux/mfd/rk808.h>
  22 #include <linux/of_device.h>
  23 #include <linux/regulator/driver.h>
  24 #include <linux/regulator/of_regulator.h>
  25
  26 /* Field Definitions */
  27 #define RK808_BUCK_VSEL_MASK    0x3f
  28 #define RK808_BUCK4_VSEL_MASK   0xf
  29 #define RK808_LDO_VSEL_MASK     0x1f
  30
  31 /* Ramp rate definitions for buck1 / buck2 only */
  32 #define RK808_RAMP_RATE_OFFSET          3
  33 #define RK808_RAMP_RATE_MASK            (3 << RK808_RAMP_RATE_OFFSET)
  34 #define RK808_RAMP_RATE_2MV_PER_US      (0 << RK808_RAMP_RATE_OFFSET)
  35 #define RK808_RAMP_RATE_4MV_PER_US      (1 << RK808_RAMP_RATE_OFFSET)
  36 #define RK808_RAMP_RATE_6MV_PER_US      (2 << RK808_RAMP_RATE_OFFSET)
  37 #define RK808_RAMP_RATE_10MV_PER_US     (3 << RK808_RAMP_RATE_OFFSET)
  38
  39 /* Offset from XXX_ON_VSEL to XXX_SLP_VSEL */
  40 #define RK808_SLP_REG_OFFSET 1
  41
  42 /* Offset from XXX_EN_REG to SLEEP_SET_OFF_XXX */
  43 #define RK808_SLP_SET_OFF_REG_OFFSET 2
  44
  45 static const int rk808_buck_config_regs[] = {
  46         RK808_BUCK1_CONFIG_REG,
  47         RK808_BUCK2_CONFIG_REG,
  48         RK808_BUCK3_CONFIG_REG,
  49         RK808_BUCK4_CONFIG_REG,
  50 };
  51
  52 static const struct regulator_linear_range rk808_buck_voltage_ranges[] = {
  53         REGULATOR_LINEAR_RANGE(712500, 0, 63, 12500),
  54 };
  55
  56 static const struct regulator_linear_range rk808_buck4_voltage_ranges[] = {
  57         REGULATOR_LINEAR_RANGE(1800000, 0, 15, 100000),
  58 };
  59
  60 static const struct regulator_linear_range rk808_ldo_voltage_ranges[] = {
  61         REGULATOR_LINEAR_RANGE(1800000, 0, 16, 100000),
  62 };
  63
  64 static const struct regulator_linear_range rk808_ldo3_voltage_ranges[] = {
  65         REGULATOR_LINEAR_RANGE(800000, 0, 13, 100000),
  66         REGULATOR_LINEAR_RANGE(2500000, 15, 15, 0),
  67 };
  68
  69 static const struct regulator_linear_range rk808_ldo6_voltage_ranges[] = {
  70         REGULATOR_LINEAR_RANGE(800000, 0, 17, 100000),
  71 };
  72
  73 static int rk808_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
  74 {
  75         unsigned int ramp_value = RK808_RAMP_RATE_10MV_PER_US;
  76         unsigned int reg = rk808_buck_config_regs[rdev->desc->id -
  77                                                   RK808_ID_DCDC1];
  78
  79         switch (ramp_delay) {
  80         case 1 ... 2000:
  81                 ramp_value = RK808_RAMP_RATE_2MV_PER_US;
  82                 break;
  83         case 2001 ... 4000:
  84                 ramp_value = RK808_RAMP_RATE_4MV_PER_US;
  85                 break;
  86         case 4001 ... 6000:
  87                 ramp_value = RK808_RAMP_RATE_6MV_PER_US;
  88                 break;
  89         case 6001 ... 10000:
  90                 break;
  91         default:
  92                 pr_warn("%s ramp_delay: %d not supported, setting 10000\n",
  93                         rdev->desc->name, ramp_delay);
  94         }
  95
  96         return regmap_update_bits(rdev->regmap, reg,
  97                                   RK808_RAMP_RATE_MASK, ramp_value);
  98 }
  99
 100 static int rk808_set_suspend_voltage(struct regulator_dev *rdev, int uv)
 101 {
 102         unsigned int reg;
 103         int sel = regulator_map_voltage_linear_range(rdev, uv, uv);
 104
 105         if (sel < 0)
 106                 return -EINVAL;
 107
 108         reg = rdev->desc->vsel_reg + RK808_SLP_REG_OFFSET;
 109
 110         return regmap_update_bits(rdev->regmap, reg,
 111                                   rdev->desc->vsel_mask,
 112                                   sel);
 113 }
 114
 115 static int rk808_set_suspend_enable(struct regulator_dev *rdev)
 116 {
 117         unsigned int reg;
 118
 119         reg = rdev->desc->enable_reg + RK808_SLP_SET_OFF_REG_OFFSET;
 120
 121         return regmap_update_bits(rdev->regmap, reg,
 122                                   rdev->desc->enable_mask,
 123                                   0);
 124 }
 125
 126 static int rk808_set_suspend_disable(struct regulator_dev *rdev)
 127 {
 128         unsigned int reg;
 129
 130         reg = rdev->desc->enable_reg + RK808_SLP_SET_OFF_REG_OFFSET;
 131
 132         return regmap_update_bits(rdev->regmap, reg,
 133                                   rdev->desc->enable_mask,
 134                                   rdev->desc->enable_mask);
 135 }
 136
 137 static struct regulator_ops rk808_buck1_2_ops = {
 138         .list_voltage           = regulator_list_voltage_linear_range,
 139         .map_voltage            = regulator_map_voltage_linear_range,
 140         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 141         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 142         .enable                 = regulator_enable_regmap,
 143         .disable                = regulator_disable_regmap,
 144         .is_enabled             = regulator_is_enabled_regmap,
 145         .set_ramp_delay         = rk808_set_ramp_delay,
 146         .set_suspend_voltage    = rk808_set_suspend_voltage,
 147         .set_suspend_enable     = rk808_set_suspend_enable,
 148         .set_suspend_disable    = rk808_set_suspend_disable,
 149 };
 150
 151 static struct regulator_ops rk808_reg_ops = {
 152         .list_voltage           = regulator_list_voltage_linear_range,
 153         .map_voltage            = regulator_map_voltage_linear_range,
 154         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 155         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 156         .enable                 = regulator_enable_regmap,
 157         .disable                = regulator_disable_regmap,
 158         .is_enabled             = regulator_is_enabled_regmap,
 159         .set_suspend_voltage    = rk808_set_suspend_voltage,
 160         .set_suspend_enable     = rk808_set_suspend_enable,
 161         .set_suspend_disable    = rk808_set_suspend_disable,
 162 };
 163
 164 static struct regulator_ops rk808_switch_ops = {
 165         .enable                 = regulator_enable_regmap,
 166         .disable                = regulator_disable_regmap,
 167         .is_enabled             = regulator_is_enabled_regmap,
 168         .set_suspend_enable     = rk808_set_suspend_enable,
 169         .set_suspend_disable    = rk808_set_suspend_disable,
 170 };
 171
 172 static const struct regulator_desc rk808_reg[] = {
 173         {
 174                 .name = "DCDC_REG1",
 175                 .supply_name = "vcc1",
 176                 .id = RK808_ID_DCDC1,
 177                 .ops = &rk808_buck1_2_ops,
 178                 .type = REGULATOR_VOLTAGE,
 179                 .n_voltages = 64,
 180                 .linear_ranges = rk808_buck_voltage_ranges,
 181                 .n_linear_ranges = ARRAY_SIZE(rk808_buck_voltage_ranges),
 182                 .vsel_reg = RK808_BUCK1_ON_VSEL_REG,
 183                 .vsel_mask = RK808_BUCK_VSEL_MASK,
 184                 .enable_reg = RK808_DCDC_EN_REG,
 185                 .enable_mask = BIT(0),
 186                 .owner = THIS_MODULE,
 187         }, {
 188                 .name = "DCDC_REG2",
 189                 .supply_name = "vcc2",
 190                 .id = RK808_ID_DCDC2,
 191                 .ops = &rk808_buck1_2_ops,
 192                 .type = REGULATOR_VOLTAGE,
 193                 .n_voltages = 64,
 194                 .linear_ranges = rk808_buck_voltage_ranges,
 195                 .n_linear_ranges = ARRAY_SIZE(rk808_buck_voltage_ranges),
 196                 .vsel_reg = RK808_BUCK2_ON_VSEL_REG,
 197                 .vsel_mask = RK808_BUCK_VSEL_MASK,
 198                 .enable_reg = RK808_DCDC_EN_REG,
 199                 .enable_mask = BIT(1),
 200                 .owner = THIS_MODULE,
 201         }, {
 202                 .name = "DCDC_REG3",
 203                 .supply_name = "vcc3",
 204                 .id = RK808_ID_DCDC3,
 205                 .ops = &rk808_switch_ops,
 206                 .type = REGULATOR_VOLTAGE,
 207                 .n_voltages = 1,
 208                 .enable_reg = RK808_DCDC_EN_REG,
 209                 .enable_mask = BIT(2),
 210                 .owner = THIS_MODULE,
 211         }, {
 212                 .name = "DCDC_REG4",
 213                 .supply_name = "vcc4",
 214                 .id = RK808_ID_DCDC4,
 215                 .ops = &rk808_reg_ops,
 216                 .type = REGULATOR_VOLTAGE,
 217                 .n_voltages = 16,
 218                 .linear_ranges = rk808_buck4_voltage_ranges,
 219                 .n_linear_ranges = ARRAY_SIZE(rk808_buck4_voltage_ranges),
 220                 .vsel_reg = RK808_BUCK4_ON_VSEL_REG,
 221                 .vsel_mask = RK808_BUCK4_VSEL_MASK,
 222                 .enable_reg = RK808_DCDC_EN_REG,
 223                 .enable_mask = BIT(3),
 224                 .owner = THIS_MODULE,
 225         }, {
 226                 .name = "LDO_REG1",
 227                 .supply_name = "vcc6",
 228                 .id = RK808_ID_LDO1,
 229                 .ops = &rk808_reg_ops,
 230                 .type = REGULATOR_VOLTAGE,
 231                 .n_voltages = 17,
 232                 .linear_ranges = rk808_ldo_voltage_ranges,
 233                 .n_linear_ranges = ARRAY_SIZE(rk808_ldo_voltage_ranges),
 234                 .vsel_reg = RK808_LDO1_ON_VSEL_REG,
 235                 .vsel_mask = RK808_LDO_VSEL_MASK,
 236                 .enable_reg = RK808_LDO_EN_REG,
 237                 .enable_mask = BIT(0),
 238                 .enable_time = 400,
 239                 .owner = THIS_MODULE,
 240         }, {
 241                 .name = "LDO_REG2",
 242                 .supply_name = "vcc6",
 243                 .id = RK808_ID_LDO2,
 244                 .ops = &rk808_reg_ops,
 245                 .type = REGULATOR_VOLTAGE,
 246                 .n_voltages = 17,
 247                 .linear_ranges = rk808_ldo_voltage_ranges,
 248                 .n_linear_ranges = ARRAY_SIZE(rk808_ldo_voltage_ranges),
 249                 .vsel_reg = RK808_LDO2_ON_VSEL_REG,
 250                 .vsel_mask = RK808_LDO_VSEL_MASK,
 251                 .enable_reg = RK808_LDO_EN_REG,
 252                 .enable_mask = BIT(1),
 253                 .enable_time = 400,
 254                 .owner = THIS_MODULE,
 255         }, {
 256                 .name = "LDO_REG3",
 257                 .supply_name = "vcc7",
 258                 .id = RK808_ID_LDO3,
 259                 .ops = &rk808_reg_ops,
 260                 .type = REGULATOR_VOLTAGE,
 261                 .n_voltages = 16,
 262                 .linear_ranges = rk808_ldo3_voltage_ranges,
 263                 .n_linear_ranges = ARRAY_SIZE(rk808_ldo3_voltage_ranges),
 264                 .vsel_reg = RK808_LDO3_ON_VSEL_REG,
 265                 .vsel_mask = RK808_BUCK4_VSEL_MASK,
 266                 .enable_reg = RK808_LDO_EN_REG,
 267                 .enable_mask = BIT(2),
 268                 .enable_time = 400,
 269                 .owner = THIS_MODULE,
 270         }, {
 271                 .name = "LDO_REG4",
 272                 .supply_name = "vcc9",
 273                 .id = RK808_ID_LDO4,
 274                 .ops = &rk808_reg_ops,
 275                 .type = REGULATOR_VOLTAGE,
 276                 .n_voltages = 17,
 277                 .linear_ranges = rk808_ldo_voltage_ranges,
 278                 .n_linear_ranges = ARRAY_SIZE(rk808_ldo_voltage_ranges),
 279                 .vsel_reg = RK808_LDO4_ON_VSEL_REG,
 280                 .vsel_mask = RK808_LDO_VSEL_MASK,
 281                 .enable_reg = RK808_LDO_EN_REG,
 282                 .enable_mask = BIT(3),
 283                 .enable_time = 400,
 284                 .owner = THIS_MODULE,
 285         }, {
 286                 .name = "LDO_REG5",
 287                 .supply_name = "vcc9",
 288                 .id = RK808_ID_LDO5,
 289                 .ops = &rk808_reg_ops,
 290                 .type = REGULATOR_VOLTAGE,
 291                 .n_voltages = 17,
 292                 .linear_ranges = rk808_ldo_voltage_ranges,
 293                 .n_linear_ranges = ARRAY_SIZE(rk808_ldo_voltage_ranges),
 294                 .vsel_reg = RK808_LDO5_ON_VSEL_REG,
 295                 .vsel_mask = RK808_LDO_VSEL_MASK,
 296                 .enable_reg = RK808_LDO_EN_REG,
 297                 .enable_mask = BIT(4),
 298                 .enable_time = 400,
 299                 .owner = THIS_MODULE,
 300         }, {
 301                 .name = "LDO_REG6",
 302                 .supply_name = "vcc10",
 303                 .id = RK808_ID_LDO6,
 304                 .ops = &rk808_reg_ops,
 305                 .type = REGULATOR_VOLTAGE,
 306                 .n_voltages = 18,
 307                 .linear_ranges = rk808_ldo6_voltage_ranges,
 308                 .n_linear_ranges = ARRAY_SIZE(rk808_ldo6_voltage_ranges),
 309                 .vsel_reg = RK808_LDO6_ON_VSEL_REG,
 310                 .vsel_mask = RK808_LDO_VSEL_MASK,
 311                 .enable_reg = RK808_LDO_EN_REG,
 312                 .enable_mask = BIT(5),
 313                 .enable_time = 400,
 314                 .owner = THIS_MODULE,
 315         }, {
 316                 .name = "LDO_REG7",
 317                 .supply_name = "vcc7",
 318                 .id = RK808_ID_LDO7,
 319                 .ops = &rk808_reg_ops,
 320                 .type = REGULATOR_VOLTAGE,
 321                 .n_voltages = 18,
 322                 .linear_ranges = rk808_ldo6_voltage_ranges,
 323                 .n_linear_ranges = ARRAY_SIZE(rk808_ldo6_voltage_ranges),
 324                 .vsel_reg = RK808_LDO7_ON_VSEL_REG,
 325                 .vsel_mask = RK808_LDO_VSEL_MASK,
 326                 .enable_reg = RK808_LDO_EN_REG,
 327                 .enable_mask = BIT(6),
 328                 .enable_time = 400,
 329                 .owner = THIS_MODULE,
 330         }, {
 331                 .name = "LDO_REG8",
 332                 .supply_name = "vcc11",
 333                 .id = RK808_ID_LDO8,
 334                 .ops = &rk808_reg_ops,
 335                 .type = REGULATOR_VOLTAGE,
 336                 .n_voltages = 17,
 337                 .linear_ranges = rk808_ldo_voltage_ranges,
 338                 .n_linear_ranges = ARRAY_SIZE(rk808_ldo_voltage_ranges),
 339                 .vsel_reg = RK808_LDO8_ON_VSEL_REG,
 340                 .vsel_mask = RK808_LDO_VSEL_MASK,
 341                 .enable_reg = RK808_LDO_EN_REG,
 342                 .enable_mask = BIT(7),
 343                 .enable_time = 400,
 344                 .owner = THIS_MODULE,
 345         }, {
 346                 .name = "SWITCH_REG1",
 347                 .supply_name = "vcc8",
 348                 .id = RK808_ID_SWITCH1,
 349                 .ops = &rk808_switch_ops,
 350                 .type = REGULATOR_VOLTAGE,
 351                 .enable_reg = RK808_DCDC_EN_REG,
 352                 .enable_mask = BIT(5),
 353                 .owner = THIS_MODULE,
 354         }, {
 355                 .name = "SWITCH_REG2",
 356                 .supply_name = "vcc12",
 357                 .id = RK808_ID_SWITCH2,
 358                 .ops = &rk808_switch_ops,
 359                 .type = REGULATOR_VOLTAGE,
 360                 .enable_reg = RK808_DCDC_EN_REG,
 361                 .enable_mask = BIT(6),
 362                 .owner = THIS_MODULE,
 363         },
 364 };
 365
 366 static struct of_regulator_match rk808_reg_matches[] = {
 367         [RK808_ID_DCDC1]        = { .name = "DCDC_REG1" },
 368         [RK808_ID_DCDC2]        = { .name = "DCDC_REG2" },
 369         [RK808_ID_DCDC3]        = { .name = "DCDC_REG3" },
 370         [RK808_ID_DCDC4]        = { .name = "DCDC_REG4" },
 371         [RK808_ID_LDO1]         = { .name = "LDO_REG1" },
 372         [RK808_ID_LDO2]         = { .name = "LDO_REG2" },
 373         [RK808_ID_LDO3]         = { .name = "LDO_REG3" },
 374         [RK808_ID_LDO4]         = { .name = "LDO_REG4" },
 375         [RK808_ID_LDO5]         = { .name = "LDO_REG5" },
 376         [RK808_ID_LDO6]         = { .name = "LDO_REG6" },
 377         [RK808_ID_LDO7]         = { .name = "LDO_REG7" },
 378         [RK808_ID_LDO8]         = { .name = "LDO_REG8" },
 379         [RK808_ID_SWITCH1]      = { .name = "SWITCH_REG1" },
 380         [RK808_ID_SWITCH2]      = { .name = "SWITCH_REG2" },
 381 };
 382
 383 static int rk808_regulator_probe(struct platform_device *pdev)
 384 {
 385         struct rk808 *rk808 = dev_get_drvdata(pdev->dev.parent);
 386         struct i2c_client *client = rk808->i2c;
 387         struct device_node *reg_np;
 388         struct regulator_config config = {};
 389         struct regulator_dev *rk808_rdev;
 390         int ret, i;
 391
 392         reg_np = of_get_child_by_name(client->dev.of_node, "regulators");
 393         if (!reg_np)
 394                 return -ENXIO;
 395
 396         ret = of_regulator_match(&pdev->dev, reg_np, rk808_reg_matches,
 397                                  RK808_NUM_REGULATORS);
 398         of_node_put(reg_np);
 399         if (ret < 0)
 400                 return ret;
 401
 402         /* Instantiate the regulators */
 403         for (i = 0; i < RK808_NUM_REGULATORS; i++) {
 404                 if (!rk808_reg_matches[i].init_data ||
 405                     !rk808_reg_matches[i].of_node)
 406                         continue;
 407
 408                 config.dev = &client->dev;
 409                 config.driver_data = rk808;
 410                 config.regmap = rk808->regmap;
 411                 config.of_node = rk808_reg_matches[i].of_node;
 412                 config.init_data = rk808_reg_matches[i].init_data;
 413
 414                 rk808_rdev = devm_regulator_register(&pdev->dev,
 415                                                      &rk808_reg[i], &config);
 416                 if (IS_ERR(rk808_rdev)) {
 417                         dev_err(&client->dev,
 418                                 "failed to register %d regulator\n", i);
 419                         return PTR_ERR(rk808_rdev);
 420                 }
 421         }
 422
 423         return 0;
 424 }
 425
 426 static struct platform_driver rk808_regulator_driver = {
 427         .probe = rk808_regulator_probe,
 428         .driver = {
 429                 .name = "rk808-regulator",
 430         },
 431 };
 432
 433 module_platform_driver(rk808_regulator_driver);
 434
 435 MODULE_DESCRIPTION("regulator driver for the rk808 series PMICs");
 436 MODULE_AUTHOR("Chris Zhong<zyw@rock-chips.com>");
 437 MODULE_AUTHOR("Zhang Qing<zhangqing@rock-chips.com>");
 438 MODULE_LICENSE("GPL");
 439 MODULE_ALIAS("platform:rk808-regulator");