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 static const int rk808_buck_config_regs[] = {
  40         RK808_BUCK1_CONFIG_REG,
  41         RK808_BUCK2_CONFIG_REG,
  42         RK808_BUCK3_CONFIG_REG,
  43         RK808_BUCK4_CONFIG_REG,
  44 };
  45
  46 static const struct regulator_linear_range rk808_buck_voltage_ranges[] = {
  47         REGULATOR_LINEAR_RANGE(712500, 0, 63, 12500),
  48 };
  49
  50 static const struct regulator_linear_range rk808_buck4_voltage_ranges[] = {
  51         REGULATOR_LINEAR_RANGE(1800000, 0, 15, 100000),
  52 };
  53
  54 static const struct regulator_linear_range rk808_ldo_voltage_ranges[] = {
  55         REGULATOR_LINEAR_RANGE(1800000, 0, 16, 100000),
  56 };
  57
  58 static const struct regulator_linear_range rk808_ldo3_voltage_ranges[] = {
  59         REGULATOR_LINEAR_RANGE(800000, 0, 13, 100000),
  60         REGULATOR_LINEAR_RANGE(2500000, 15, 15, 0),
  61 };
  62
  63 static const struct regulator_linear_range rk808_ldo6_voltage_ranges[] = {
  64         REGULATOR_LINEAR_RANGE(800000, 0, 17, 100000),
  65 };
  66
  67 static int rk808_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
  68 {
  69         unsigned int ramp_value = RK808_RAMP_RATE_10MV_PER_US;
  70         unsigned int reg = rk808_buck_config_regs[rdev->desc->id -
  71                                                   RK808_ID_DCDC1];
  72
  73         switch (ramp_delay) {
  74         case 1 ... 2000:
  75                 ramp_value = RK808_RAMP_RATE_2MV_PER_US;
  76                 break;
  77         case 2001 ... 4000:
  78                 ramp_value = RK808_RAMP_RATE_4MV_PER_US;
  79                 break;
  80         case 4001 ... 6000:
  81                 ramp_value = RK808_RAMP_RATE_6MV_PER_US;
  82                 break;
  83         case 6001 ... 10000:
  84                 break;
  85         default:
  86                 pr_warn("%s ramp_delay: %d not supported, setting 10000\n",
  87                         rdev->desc->name, ramp_delay);
  88         }
  89
  90         return regmap_update_bits(rdev->regmap, reg,
  91                                   RK808_RAMP_RATE_MASK, ramp_value);
  92 }
  93
  94 static struct regulator_ops rk808_buck1_2_ops = {
  95         .list_voltage           = regulator_list_voltage_linear_range,
  96         .map_voltage            = regulator_map_voltage_linear_range,
  97         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
  98         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
  99         .enable                 = regulator_enable_regmap,
 100         .disable                = regulator_disable_regmap,
 101         .is_enabled             = regulator_is_enabled_regmap,
 102         .set_ramp_delay         = rk808_set_ramp_delay,
 103 };
 104
 105 static struct regulator_ops rk808_reg_ops = {
 106         .list_voltage           = regulator_list_voltage_linear_range,
 107         .map_voltage            = regulator_map_voltage_linear_range,
 108         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 109         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 110         .enable                 = regulator_enable_regmap,
 111         .disable                = regulator_disable_regmap,
 112         .is_enabled             = regulator_is_enabled_regmap,
 113 };
 114
 115 static struct regulator_ops rk808_switch_ops = {
 116         .enable = regulator_enable_regmap,
 117         .disable = regulator_disable_regmap,
 118         .is_enabled = regulator_is_enabled_regmap,
 119 };
 120
 121 static const struct regulator_desc rk808_reg[] = {
 122         {
 123                 .name = "DCDC_REG1",
 124                 .supply_name = "vcc1",
 125                 .id = RK808_ID_DCDC1,
 126                 .ops = &rk808_buck1_2_ops,
 127                 .type = REGULATOR_VOLTAGE,
 128                 .n_voltages = 64,
 129                 .linear_ranges = rk808_buck_voltage_ranges,
 130                 .n_linear_ranges = ARRAY_SIZE(rk808_buck_voltage_ranges),
 131                 .vsel_reg = RK808_BUCK1_ON_VSEL_REG,
 132                 .vsel_mask = RK808_BUCK_VSEL_MASK,
 133                 .enable_reg = RK808_DCDC_EN_REG,
 134                 .enable_mask = BIT(0),
 135                 .owner = THIS_MODULE,
 136         }, {
 137                 .name = "DCDC_REG2",
 138                 .supply_name = "vcc2",
 139                 .id = RK808_ID_DCDC2,
 140                 .ops = &rk808_buck1_2_ops,
 141                 .type = REGULATOR_VOLTAGE,
 142                 .n_voltages = 64,
 143                 .linear_ranges = rk808_buck_voltage_ranges,
 144                 .n_linear_ranges = ARRAY_SIZE(rk808_buck_voltage_ranges),
 145                 .vsel_reg = RK808_BUCK2_ON_VSEL_REG,
 146                 .vsel_mask = RK808_BUCK_VSEL_MASK,
 147                 .enable_reg = RK808_DCDC_EN_REG,
 148                 .enable_mask = BIT(1),
 149                 .owner = THIS_MODULE,
 150         }, {
 151                 .name = "DCDC_REG3",
 152                 .supply_name = "vcc3",
 153                 .id = RK808_ID_DCDC3,
 154                 .ops = &rk808_switch_ops,
 155                 .type = REGULATOR_VOLTAGE,
 156                 .n_voltages = 1,
 157                 .enable_reg = RK808_DCDC_EN_REG,
 158                 .enable_mask = BIT(2),
 159                 .owner = THIS_MODULE,
 160         }, {
 161                 .name = "DCDC_REG4",
 162                 .supply_name = "vcc4",
 163                 .id = RK808_ID_DCDC4,
 164                 .ops = &rk808_reg_ops,
 165                 .type = REGULATOR_VOLTAGE,
 166                 .n_voltages = 16,
 167                 .linear_ranges = rk808_buck4_voltage_ranges,
 168                 .n_linear_ranges = ARRAY_SIZE(rk808_buck4_voltage_ranges),
 169                 .vsel_reg = RK808_BUCK4_ON_VSEL_REG,
 170                 .vsel_mask = RK808_BUCK4_VSEL_MASK,
 171                 .enable_reg = RK808_DCDC_EN_REG,
 172                 .enable_mask = BIT(3),
 173                 .owner = THIS_MODULE,
 174         }, {
 175                 .name = "LDO_REG1",
 176                 .supply_name = "vcc6",
 177                 .id = RK808_ID_LDO1,
 178                 .ops = &rk808_reg_ops,
 179                 .type = REGULATOR_VOLTAGE,
 180                 .n_voltages = 17,
 181                 .linear_ranges = rk808_ldo_voltage_ranges,
 182                 .n_linear_ranges = ARRAY_SIZE(rk808_ldo_voltage_ranges),
 183                 .vsel_reg = RK808_LDO1_ON_VSEL_REG,
 184                 .vsel_mask = RK808_LDO_VSEL_MASK,
 185                 .enable_reg = RK808_LDO_EN_REG,
 186                 .enable_mask = BIT(0),
 187                 .owner = THIS_MODULE,
 188         }, {
 189                 .name = "LDO_REG2",
 190                 .supply_name = "vcc6",
 191                 .id = RK808_ID_LDO2,
 192                 .ops = &rk808_reg_ops,
 193                 .type = REGULATOR_VOLTAGE,
 194                 .n_voltages = 17,
 195                 .linear_ranges = rk808_ldo_voltage_ranges,
 196                 .n_linear_ranges = ARRAY_SIZE(rk808_ldo_voltage_ranges),
 197                 .vsel_reg = RK808_LDO2_ON_VSEL_REG,
 198                 .vsel_mask = RK808_LDO_VSEL_MASK,
 199                 .enable_reg = RK808_LDO_EN_REG,
 200                 .enable_mask = BIT(1),
 201                 .owner = THIS_MODULE,
 202         }, {
 203                 .name = "LDO_REG3",
 204                 .supply_name = "vcc7",
 205                 .id = RK808_ID_LDO3,
 206                 .ops = &rk808_reg_ops,
 207                 .type = REGULATOR_VOLTAGE,
 208                 .n_voltages = 16,
 209                 .linear_ranges = rk808_ldo3_voltage_ranges,
 210                 .n_linear_ranges = ARRAY_SIZE(rk808_ldo3_voltage_ranges),
 211                 .vsel_reg = RK808_LDO3_ON_VSEL_REG,
 212                 .vsel_mask = RK808_BUCK4_VSEL_MASK,
 213                 .enable_reg = RK808_LDO_EN_REG,
 214                 .enable_mask = BIT(2),
 215                 .owner = THIS_MODULE,
 216         }, {
 217                 .name = "LDO_REG4",
 218                 .supply_name = "vcc9",
 219                 .id = RK808_ID_LDO4,
 220                 .ops = &rk808_reg_ops,
 221                 .type = REGULATOR_VOLTAGE,
 222                 .n_voltages = 17,
 223                 .linear_ranges = rk808_ldo_voltage_ranges,
 224                 .n_linear_ranges = ARRAY_SIZE(rk808_ldo_voltage_ranges),
 225                 .vsel_reg = RK808_LDO4_ON_VSEL_REG,
 226                 .vsel_mask = RK808_LDO_VSEL_MASK,
 227                 .enable_reg = RK808_LDO_EN_REG,
 228                 .enable_mask = BIT(3),
 229                 .owner = THIS_MODULE,
 230         }, {
 231                 .name = "LDO_REG5",
 232                 .supply_name = "vcc9",
 233                 .id = RK808_ID_LDO5,
 234                 .ops = &rk808_reg_ops,
 235                 .type = REGULATOR_VOLTAGE,
 236                 .n_voltages = 17,
 237                 .linear_ranges = rk808_ldo_voltage_ranges,
 238                 .n_linear_ranges = ARRAY_SIZE(rk808_ldo_voltage_ranges),
 239                 .vsel_reg = RK808_LDO5_ON_VSEL_REG,
 240                 .vsel_mask = RK808_LDO_VSEL_MASK,
 241                 .enable_reg = RK808_LDO_EN_REG,
 242                 .enable_mask = BIT(4),
 243                 .owner = THIS_MODULE,
 244         }, {
 245                 .name = "LDO_REG6",
 246                 .supply_name = "vcc10",
 247                 .id = RK808_ID_LDO6,
 248                 .ops = &rk808_reg_ops,
 249                 .type = REGULATOR_VOLTAGE,
 250                 .n_voltages = 18,
 251                 .linear_ranges = rk808_ldo6_voltage_ranges,
 252                 .n_linear_ranges = ARRAY_SIZE(rk808_ldo6_voltage_ranges),
 253                 .vsel_reg = RK808_LDO6_ON_VSEL_REG,
 254                 .vsel_mask = RK808_LDO_VSEL_MASK,
 255                 .enable_reg = RK808_LDO_EN_REG,
 256                 .enable_mask = BIT(5),
 257                 .owner = THIS_MODULE,
 258         }, {
 259                 .name = "LDO_REG7",
 260                 .supply_name = "vcc7",
 261                 .id = RK808_ID_LDO7,
 262                 .ops = &rk808_reg_ops,
 263                 .type = REGULATOR_VOLTAGE,
 264                 .n_voltages = 18,
 265                 .linear_ranges = rk808_ldo6_voltage_ranges,
 266                 .n_linear_ranges = ARRAY_SIZE(rk808_ldo6_voltage_ranges),
 267                 .vsel_reg = RK808_LDO7_ON_VSEL_REG,
 268                 .vsel_mask = RK808_LDO_VSEL_MASK,
 269                 .enable_reg = RK808_LDO_EN_REG,
 270                 .enable_mask = BIT(6),
 271                 .owner = THIS_MODULE,
 272         }, {
 273                 .name = "LDO_REG8",
 274                 .supply_name = "vcc11",
 275                 .id = RK808_ID_LDO8,
 276                 .ops = &rk808_reg_ops,
 277                 .type = REGULATOR_VOLTAGE,
 278                 .n_voltages = 17,
 279                 .linear_ranges = rk808_ldo_voltage_ranges,
 280                 .n_linear_ranges = ARRAY_SIZE(rk808_ldo_voltage_ranges),
 281                 .vsel_reg = RK808_LDO8_ON_VSEL_REG,
 282                 .vsel_mask = RK808_LDO_VSEL_MASK,
 283                 .enable_reg = RK808_LDO_EN_REG,
 284                 .enable_mask = BIT(7),
 285                 .owner = THIS_MODULE,
 286         }, {
 287                 .name = "SWITCH_REG1",
 288                 .supply_name = "vcc8",
 289                 .id = RK808_ID_SWITCH1,
 290                 .ops = &rk808_switch_ops,
 291                 .type = REGULATOR_VOLTAGE,
 292                 .enable_reg = RK808_DCDC_EN_REG,
 293                 .enable_mask = BIT(5),
 294                 .owner = THIS_MODULE,
 295         }, {
 296                 .name = "SWITCH_REG2",
 297                 .supply_name = "vcc12",
 298                 .id = RK808_ID_SWITCH2,
 299                 .ops = &rk808_switch_ops,
 300                 .type = REGULATOR_VOLTAGE,
 301                 .enable_reg = RK808_DCDC_EN_REG,
 302                 .enable_mask = BIT(6),
 303                 .owner = THIS_MODULE,
 304         },
 305 };
 306
 307 static struct of_regulator_match rk808_reg_matches[] = {
 308         [RK808_ID_DCDC1]        = { .name = "DCDC_REG1" },
 309         [RK808_ID_DCDC2]        = { .name = "DCDC_REG2" },
 310         [RK808_ID_DCDC3]        = { .name = "DCDC_REG3" },
 311         [RK808_ID_DCDC4]        = { .name = "DCDC_REG4" },
 312         [RK808_ID_LDO1]         = { .name = "LDO_REG1" },
 313         [RK808_ID_LDO2]         = { .name = "LDO_REG2" },
 314         [RK808_ID_LDO3]         = { .name = "LDO_REG3" },
 315         [RK808_ID_LDO4]         = { .name = "LDO_REG4" },
 316         [RK808_ID_LDO5]         = { .name = "LDO_REG5" },
 317         [RK808_ID_LDO6]         = { .name = "LDO_REG6" },
 318         [RK808_ID_LDO7]         = { .name = "LDO_REG7" },
 319         [RK808_ID_LDO8]         = { .name = "LDO_REG8" },
 320         [RK808_ID_SWITCH1]      = { .name = "SWITCH_REG1" },
 321         [RK808_ID_SWITCH2]      = { .name = "SWITCH_REG2" },
 322 };
 323
 324 static int rk808_regulator_probe(struct platform_device *pdev)
 325 {
 326         struct rk808 *rk808 = dev_get_drvdata(pdev->dev.parent);
 327         struct i2c_client *client = rk808->i2c;
 328         struct device_node *reg_np;
 329         struct regulator_config config = {};
 330         struct regulator_dev *rk808_rdev;
 331         int ret, i;
 332
 333         reg_np = of_get_child_by_name(client->dev.of_node, "regulators");
 334         if (!reg_np)
 335                 return -ENXIO;
 336
 337         ret = of_regulator_match(&pdev->dev, reg_np, rk808_reg_matches,
 338                                  RK808_NUM_REGULATORS);
 339         of_node_put(reg_np);
 340         if (ret < 0)
 341                 return ret;
 342
 343         /* Instantiate the regulators */
 344         for (i = 0; i < RK808_NUM_REGULATORS; i++) {
 345                 if (!rk808_reg_matches[i].init_data ||
 346                     !rk808_reg_matches[i].of_node)
 347                         continue;
 348
 349                 config.dev = &client->dev;
 350                 config.driver_data = rk808;
 351                 config.regmap = rk808->regmap;
 352                 config.of_node = rk808_reg_matches[i].of_node;
 353                 config.init_data = rk808_reg_matches[i].init_data;
 354
 355                 rk808_rdev = devm_regulator_register(&pdev->dev,
 356                                                      &rk808_reg[i], &config);
 357                 if (IS_ERR(rk808_rdev)) {
 358                         dev_err(&client->dev,
 359                                 "failed to register %d regulator\n", i);
 360                         return PTR_ERR(rk808_rdev);
 361                 }
 362         }
 363
 364         return 0;
 365 }
 366
 367 static struct platform_driver rk808_regulator_driver = {
 368         .probe = rk808_regulator_probe,
 369         .driver = {
 370                 .name = "rk808-regulator",
 371                 .owner = THIS_MODULE,
 372         },
 373 };
 374
 375 module_platform_driver(rk808_regulator_driver);
 376
 377 MODULE_DESCRIPTION("regulator driver for the rk808 series PMICs");
 378 MODULE_AUTHOR("Chris Zhong<zyw@rock-chips.com>");
 379 MODULE_AUTHOR("Zhang Qing<zhangqing@rock-chips.com>");
 380 MODULE_LICENSE("GPL");
 381 MODULE_ALIAS("platform:rk808-regulator");