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 static const int buck_set_vol_base_addr[] = {
  32         RK808_BUCK1_ON_VSEL_REG,
  33         RK808_BUCK2_ON_VSEL_REG,
  34         RK808_BUCK3_CONFIG_REG,
  35         RK808_BUCK4_ON_VSEL_REG,
  36 };
  37
  38 static const int buck_contr_base_addr[] = {
  39         RK808_BUCK1_CONFIG_REG,
  40         RK808_BUCK2_CONFIG_REG,
  41         RK808_BUCK3_CONFIG_REG,
  42         RK808_BUCK4_CONFIG_REG,
  43 };
  44
  45 static const int ldo_set_vol_base_addr[] = {
  46         RK808_LDO1_ON_VSEL_REG,
  47         RK808_LDO2_ON_VSEL_REG,
  48         RK808_LDO3_ON_VSEL_REG,
  49         RK808_LDO4_ON_VSEL_REG,
  50         RK808_LDO5_ON_VSEL_REG,
  51         RK808_LDO6_ON_VSEL_REG,
  52         RK808_LDO7_ON_VSEL_REG,
  53         RK808_LDO8_ON_VSEL_REG,
  54 };
  55
  56 /* rk808 voltage number */
  57 static const struct regulator_linear_range rk808_buck_voltage_ranges[] = {
  58         REGULATOR_LINEAR_RANGE(700000, 0, 63, 12500),
  59 };
  60
  61 static const struct regulator_linear_range rk808_buck4_voltage_ranges[] = {
  62         REGULATOR_LINEAR_RANGE(1800000, 0, 15, 100000),
  63 };
  64
  65 static const struct regulator_linear_range rk808_ldo_voltage_ranges[] = {
  66         REGULATOR_LINEAR_RANGE(1800000, 0, 16, 100000),
  67 };
  68
  69 static const struct regulator_linear_range rk808_ldo3_voltage_ranges[] = {
  70         REGULATOR_LINEAR_RANGE(800000, 0, 13, 100000),
  71         REGULATOR_LINEAR_RANGE(2500000, 15, 15, 0),
  72 };
  73
  74 static const struct regulator_linear_range rk808_ldo6_voltage_ranges[] = {
  75         REGULATOR_LINEAR_RANGE(800000, 0, 17, 100000),
  76 };
  77
  78 static struct regulator_ops rk808_reg_ops = {
  79         .list_voltage           = regulator_list_voltage_linear_range,
  80         .map_voltage            = regulator_map_voltage_linear_range,
  81         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
  82         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
  83         .enable                 = regulator_enable_regmap,
  84         .disable                = regulator_disable_regmap,
  85         .is_enabled             = regulator_is_enabled_regmap,
  86 };
  87
  88 static struct regulator_ops rk808_switch_ops = {
  89         .enable = regulator_enable_regmap,
  90         .disable = regulator_disable_regmap,
  91         .is_enabled = regulator_is_enabled_regmap,
  92 };
  93
  94 static const struct regulator_desc rk808_reg[] = {
  95         {
  96                 .name = "DCDC_REG1",
  97                 .supply_name = "vcc1",
  98                 .id = RK808_ID_DCDC1,
  99                 .ops = &rk808_reg_ops,
 100                 .type = REGULATOR_VOLTAGE,
 101                 .n_voltages = 64,
 102                 .linear_ranges = rk808_buck_voltage_ranges,
 103                 .n_linear_ranges = ARRAY_SIZE(rk808_buck_voltage_ranges),
 104                 .vsel_reg = RK808_BUCK1_ON_VSEL_REG,
 105                 .vsel_mask = RK808_BUCK_VSEL_MASK,
 106                 .enable_reg = RK808_DCDC_EN_REG,
 107                 .enable_mask = BIT(0),
 108                 .owner = THIS_MODULE,
 109         }, {
 110                 .name = "DCDC_REG2",
 111                 .supply_name = "vcc2",
 112                 .id = RK808_ID_DCDC2,
 113                 .ops = &rk808_reg_ops,
 114                 .type = REGULATOR_VOLTAGE,
 115                 .n_voltages = 64,
 116                 .linear_ranges = rk808_buck_voltage_ranges,
 117                 .n_linear_ranges = ARRAY_SIZE(rk808_buck_voltage_ranges),
 118                 .vsel_reg = RK808_BUCK2_ON_VSEL_REG,
 119                 .vsel_mask = RK808_BUCK_VSEL_MASK,
 120                 .enable_reg = RK808_DCDC_EN_REG,
 121                 .enable_mask = BIT(1),
 122                 .owner = THIS_MODULE,
 123         }, {
 124                 .name = "DCDC_REG3",
 125                 .supply_name = "vcc3",
 126                 .id = RK808_ID_DCDC3,
 127                 .ops = &rk808_switch_ops,
 128                 .type = REGULATOR_VOLTAGE,
 129                 .n_voltages = 1,
 130                 .enable_reg = RK808_DCDC_EN_REG,
 131                 .enable_mask = BIT(2),
 132                 .owner = THIS_MODULE,
 133         }, {
 134                 .name = "DCDC_REG4",
 135                 .supply_name = "vcc4",
 136                 .id = RK808_ID_DCDC4,
 137                 .ops = &rk808_reg_ops,
 138                 .type = REGULATOR_VOLTAGE,
 139                 .n_voltages = 16,
 140                 .linear_ranges = rk808_buck4_voltage_ranges,
 141                 .n_linear_ranges = ARRAY_SIZE(rk808_buck4_voltage_ranges),
 142                 .vsel_reg = RK808_BUCK4_ON_VSEL_REG,
 143                 .vsel_mask = RK808_BUCK4_VSEL_MASK,
 144                 .enable_reg = RK808_DCDC_EN_REG,
 145                 .enable_mask = BIT(3),
 146                 .owner = THIS_MODULE,
 147         }, {
 148                 .name = "LDO_REG1",
 149                 .supply_name = "vcc6",
 150                 .id = RK808_ID_LDO1,
 151                 .ops = &rk808_reg_ops,
 152                 .type = REGULATOR_VOLTAGE,
 153                 .n_voltages = 17,
 154                 .linear_ranges = rk808_ldo_voltage_ranges,
 155                 .n_linear_ranges = ARRAY_SIZE(rk808_ldo_voltage_ranges),
 156                 .vsel_reg = RK808_LDO1_ON_VSEL_REG,
 157                 .vsel_mask = RK808_LDO_VSEL_MASK,
 158                 .enable_reg = RK808_LDO_EN_REG,
 159                 .enable_mask = BIT(0),
 160                 .owner = THIS_MODULE,
 161         }, {
 162                 .name = "LDO_REG2",
 163                 .supply_name = "vcc6",
 164                 .id = RK808_ID_LDO2,
 165                 .ops = &rk808_reg_ops,
 166                 .type = REGULATOR_VOLTAGE,
 167                 .n_voltages = 17,
 168                 .linear_ranges = rk808_ldo_voltage_ranges,
 169                 .n_linear_ranges = ARRAY_SIZE(rk808_ldo_voltage_ranges),
 170                 .vsel_reg = RK808_LDO2_ON_VSEL_REG,
 171                 .vsel_mask = RK808_LDO_VSEL_MASK,
 172                 .enable_reg = RK808_LDO_EN_REG,
 173                 .enable_mask = BIT(1),
 174                 .owner = THIS_MODULE,
 175         }, {
 176                 .name = "LDO_REG3",
 177                 .supply_name = "vcc7",
 178                 .id = RK808_ID_LDO3,
 179                 .ops = &rk808_reg_ops,
 180                 .type = REGULATOR_VOLTAGE,
 181                 .n_voltages = 16,
 182                 .linear_ranges = rk808_ldo3_voltage_ranges,
 183                 .n_linear_ranges = ARRAY_SIZE(rk808_ldo3_voltage_ranges),
 184                 .vsel_reg = RK808_LDO3_ON_VSEL_REG,
 185                 .vsel_mask = RK808_BUCK4_VSEL_MASK,
 186                 .enable_reg = RK808_LDO_EN_REG,
 187                 .enable_mask = BIT(2),
 188                 .owner = THIS_MODULE,
 189         }, {
 190                 .name = "LDO_REG4",
 191                 .supply_name = "vcc9",
 192                 .id = RK808_ID_LDO4,
 193                 .ops = &rk808_reg_ops,
 194                 .type = REGULATOR_VOLTAGE,
 195                 .n_voltages = 17,
 196                 .linear_ranges = rk808_ldo_voltage_ranges,
 197                 .n_linear_ranges = ARRAY_SIZE(rk808_ldo_voltage_ranges),
 198                 .vsel_reg = RK808_LDO4_ON_VSEL_REG,
 199                 .vsel_mask = RK808_LDO_VSEL_MASK,
 200                 .enable_reg = RK808_LDO_EN_REG,
 201                 .enable_mask = BIT(3),
 202                 .owner = THIS_MODULE,
 203         }, {
 204                 .name = "LDO_REG5",
 205                 .supply_name = "vcc9",
 206                 .id = RK808_ID_LDO5,
 207                 .ops = &rk808_reg_ops,
 208                 .type = REGULATOR_VOLTAGE,
 209                 .n_voltages = 17,
 210                 .linear_ranges = rk808_ldo_voltage_ranges,
 211                 .n_linear_ranges = ARRAY_SIZE(rk808_ldo_voltage_ranges),
 212                 .vsel_reg = RK808_LDO5_ON_VSEL_REG,
 213                 .vsel_mask = RK808_LDO_VSEL_MASK,
 214                 .enable_reg = RK808_LDO_EN_REG,
 215                 .enable_mask = BIT(4),
 216                 .owner = THIS_MODULE,
 217         }, {
 218                 .name = "LDO_REG6",
 219                 .supply_name = "vcc10",
 220                 .id = RK808_ID_LDO6,
 221                 .ops = &rk808_reg_ops,
 222                 .type = REGULATOR_VOLTAGE,
 223                 .n_voltages = 18,
 224                 .linear_ranges = rk808_ldo6_voltage_ranges,
 225                 .n_linear_ranges = ARRAY_SIZE(rk808_ldo6_voltage_ranges),
 226                 .vsel_reg = RK808_LDO6_ON_VSEL_REG,
 227                 .vsel_mask = RK808_LDO_VSEL_MASK,
 228                 .enable_reg = RK808_LDO_EN_REG,
 229                 .enable_mask = BIT(5),
 230                 .owner = THIS_MODULE,
 231         }, {
 232                 .name = "LDO_REG7",
 233                 .supply_name = "vcc7",
 234                 .id = RK808_ID_LDO7,
 235                 .ops = &rk808_reg_ops,
 236                 .type = REGULATOR_VOLTAGE,
 237                 .n_voltages = 18,
 238                 .linear_ranges = rk808_ldo6_voltage_ranges,
 239                 .n_linear_ranges = ARRAY_SIZE(rk808_ldo6_voltage_ranges),
 240                 .vsel_reg = RK808_LDO7_ON_VSEL_REG,
 241                 .vsel_mask = RK808_LDO_VSEL_MASK,
 242                 .enable_reg = RK808_LDO_EN_REG,
 243                 .enable_mask = BIT(6),
 244                 .owner = THIS_MODULE,
 245         }, {
 246                 .name = "LDO_REG8",
 247                 .supply_name = "vcc11",
 248                 .id = RK808_ID_LDO8,
 249                 .ops = &rk808_reg_ops,
 250                 .type = REGULATOR_VOLTAGE,
 251                 .n_voltages = 17,
 252                 .linear_ranges = rk808_ldo_voltage_ranges,
 253                 .n_linear_ranges = ARRAY_SIZE(rk808_ldo_voltage_ranges),
 254                 .vsel_reg = RK808_LDO8_ON_VSEL_REG,
 255                 .vsel_mask = RK808_LDO_VSEL_MASK,
 256                 .enable_reg = RK808_LDO_EN_REG,
 257                 .enable_mask = BIT(7),
 258                 .owner = THIS_MODULE,
 259         }, {
 260                 .name = "SWITCH_REG1",
 261                 .supply_name = "vcc8",
 262                 .id = RK808_ID_SWITCH1,
 263                 .ops = &rk808_switch_ops,
 264                 .type = REGULATOR_VOLTAGE,
 265                 .enable_reg = RK808_DCDC_EN_REG,
 266                 .enable_mask = BIT(5),
 267                 .owner = THIS_MODULE,
 268         }, {
 269                 .name = "SWITCH_REG2",
 270                 .supply_name = "vcc12",
 271                 .id = RK808_ID_SWITCH2,
 272                 .ops = &rk808_switch_ops,
 273                 .type = REGULATOR_VOLTAGE,
 274                 .enable_reg = RK808_DCDC_EN_REG,
 275                 .enable_mask = BIT(6),
 276                 .owner = THIS_MODULE,
 277         },
 278 };
 279
 280 static struct of_regulator_match rk808_reg_matches[] = {
 281         [RK808_ID_DCDC1]        = { .name = "DCDC_REG1" },
 282         [RK808_ID_DCDC2]        = { .name = "DCDC_REG2" },
 283         [RK808_ID_DCDC3]        = { .name = "DCDC_REG3" },
 284         [RK808_ID_DCDC4]        = { .name = "DCDC_REG4" },
 285         [RK808_ID_LDO1]         = { .name = "LDO_REG1" },
 286         [RK808_ID_LDO2]         = { .name = "LDO_REG2" },
 287         [RK808_ID_LDO3]         = { .name = "LDO_REG3" },
 288         [RK808_ID_LDO4]         = { .name = "LDO_REG4" },
 289         [RK808_ID_LDO5]         = { .name = "LDO_REG5" },
 290         [RK808_ID_LDO6]         = { .name = "LDO_REG6" },
 291         [RK808_ID_LDO7]         = { .name = "LDO_REG7" },
 292         [RK808_ID_LDO8]         = { .name = "LDO_REG8" },
 293         [RK808_ID_SWITCH1]      = { .name = "SWITCH_REG1" },
 294         [RK808_ID_SWITCH2]      = { .name = "SWITCH_REG2" },
 295 };
 296
 297 static int rk808_regulator_probe(struct platform_device *pdev)
 298 {
 299         struct rk808 *rk808 = dev_get_drvdata(pdev->dev.parent);
 300         struct i2c_client *client = rk808->i2c;
 301         struct device_node *reg_np;
 302         struct regulator_config config = {};
 303         struct regulator_dev *rk808_rdev;
 304         int ret, i;
 305
 306         reg_np = of_get_child_by_name(client->dev.of_node, "regulators");
 307         if (!reg_np)
 308                 return -ENXIO;
 309
 310         ret = of_regulator_match(&client->dev, reg_np, rk808_reg_matches,
 311                                  RK808_NUM_REGULATORS);
 312         if (ret < 0)
 313                 return ret;
 314
 315         /* Instantiate the regulators */
 316         for (i = 0; i < RK808_NUM_REGULATORS; i++) {
 317                 if (!rk808_reg_matches[i].init_data ||
 318                     !rk808_reg_matches[i].of_node)
 319                         continue;
 320
 321                 config.dev = &client->dev;
 322                 config.driver_data = rk808;
 323                 config.regmap = rk808->regmap;
 324                 config.of_node = rk808_reg_matches[i].of_node;
 325                 config.init_data = rk808_reg_matches[i].init_data;
 326
 327                 rk808_rdev = devm_regulator_register(&pdev->dev,
 328                                                      &rk808_reg[i], &config);
 329                 if (IS_ERR(rk808_rdev)) {
 330                         dev_err(&client->dev,
 331                                 "failed to register %d regulator\n", i);
 332                         return PTR_ERR(rk808_rdev);
 333                 }
 334         }
 335
 336         return 0;
 337 }
 338
 339 static struct platform_driver rk808_regulator_driver = {
 340         .probe = rk808_regulator_probe,
 341         .driver = {
 342                 .name = "rk808-regulator",
 343                 .owner = THIS_MODULE,
 344         },
 345 };
 346
 347 module_platform_driver(rk808_regulator_driver);
 348
 349 MODULE_DESCRIPTION("regulator driver for the rk808 series PMICs");
 350 MODULE_AUTHOR("Chris Zhong<zyw@rock-chips.com>");
 351 MODULE_AUTHOR("Zhang Qing<zhangqing@rock-chips.com>");
 352 MODULE_LICENSE("GPL");
 353 MODULE_ALIAS("platform:rk808-regulator");