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
  20 #include <linux/module.h>
  21 #include <linux/init.h>
  22 #include <linux/i2c.h>
  23 #include <linux/err.h>
  24 #include <linux/platform_device.h>
  25 #include <linux/mfd/rk808.h>
  26 #include <linux/of.h>
  27 #include <linux/of_device.h>
  28 #include <linux/regulator/driver.h>
  29 #include <linux/regulator/of_regulator.h>
  30 #include <linux/regmap.h>
  31 #include <linux/slab.h>
  32 /*
  33  * Field Definitions.
  34  */
  35 #define RK808_BUCK_VSEL_MASK    0x3f
  36 #define RK808_BUCK4_VSEL_MASK   0xf
  37 #define RK808_LDO_VSEL_MASK     0x1f
  38
  39 static const int buck_set_vol_base_addr[] = {
  40         RK808_BUCK1_ON_VSEL_REG,
  41         RK808_BUCK2_ON_VSEL_REG,
  42         RK808_BUCK3_CONFIG_REG,
  43         RK808_BUCK4_ON_VSEL_REG,
  44 };
  45
  46 static const int buck_contr_base_addr[] = {
  47         RK808_BUCK1_CONFIG_REG,
  48         RK808_BUCK2_CONFIG_REG,
  49         RK808_BUCK3_CONFIG_REG,
  50         RK808_BUCK4_CONFIG_REG,
  51 };
  52
  53 #define rk808_BUCK_SET_VOL_REG(x) (buck_set_vol_base_addr[x])
  54 #define rk808_BUCK_CONTR_REG(x) (buck_contr_base_addr[x])
  55 #define rk808_LDO_SET_VOL_REG(x) (ldo_set_vol_base_addr[x])
  56
  57 static const int ldo_set_vol_base_addr[] = {
  58         RK808_LDO1_ON_VSEL_REG,
  59         RK808_LDO2_ON_VSEL_REG,
  60         RK808_LDO3_ON_VSEL_REG,
  61         RK808_LDO4_ON_VSEL_REG,
  62         RK808_LDO5_ON_VSEL_REG,
  63         RK808_LDO6_ON_VSEL_REG,
  64         RK808_LDO7_ON_VSEL_REG,
  65         RK808_LDO8_ON_VSEL_REG,
  66 };
  67
  68 /*
  69  * rk808 voltage number
  70  */
  71 static const struct regulator_linear_range rk808_buck_voltage_ranges[] = {
  72         REGULATOR_LINEAR_RANGE(700000, 0, 63, 12500),
  73 };
  74
  75 static const struct regulator_linear_range rk808_buck4_voltage_ranges[] = {
  76         REGULATOR_LINEAR_RANGE(1800000, 0, 15, 100000),
  77 };
  78
  79 static const struct regulator_linear_range rk808_ldo_voltage_ranges[] = {
  80         REGULATOR_LINEAR_RANGE(1800000, 0, 16, 100000),
  81 };
  82
  83 static const struct regulator_linear_range rk808_ldo3_voltage_ranges[] = {
  84         REGULATOR_LINEAR_RANGE(800000, 0, 13, 100000),
  85         REGULATOR_LINEAR_RANGE(2500000, 15, 15, 0),
  86 };
  87
  88 static const struct regulator_linear_range rk808_ldo6_voltage_ranges[] = {
  89         REGULATOR_LINEAR_RANGE(800000, 0, 17, 100000),
  90 };
  91
  92 static struct regulator_ops rk808_reg_ops = {
  93         .list_voltage           = regulator_list_voltage_linear_range,
  94         .map_voltage            = regulator_map_voltage_linear_range,
  95         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
  96         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
  97         .enable                 = regulator_enable_regmap,
  98         .disable                = regulator_disable_regmap,
  99         .is_enabled             = regulator_is_enabled_regmap,
 100 };
 101
 102 static struct regulator_ops rk808_switch_ops = {
 103         .enable = regulator_enable_regmap,
 104         .disable = regulator_disable_regmap,
 105         .is_enabled = regulator_is_enabled_regmap,
 106 };
 107
 108 static const struct regulator_desc rk808_reg[] = {
 109         {
 110                 .name = "DCDC_REG1",
 111                 .id = RK808_ID_DCDC1,
 112                 .ops = &rk808_reg_ops,
 113                 .type = REGULATOR_VOLTAGE,
 114                 .n_voltages = 64,
 115                 .linear_ranges = rk808_buck_voltage_ranges,
 116                 .n_linear_ranges = ARRAY_SIZE(rk808_buck_voltage_ranges),
 117                 .vsel_reg = RK808_BUCK1_ON_VSEL_REG,
 118                 .vsel_mask = RK808_BUCK_VSEL_MASK,
 119                 .enable_reg = RK808_DCDC_EN_REG,
 120                 .enable_mask = BIT(0),
 121                 .owner = THIS_MODULE,
 122         }, {
 123                 .name = "DCDC_REG2",
 124                 .id = RK808_ID_DCDC2,
 125                 .ops = &rk808_reg_ops,
 126                 .type = REGULATOR_VOLTAGE,
 127                 .n_voltages = 64,
 128                 .linear_ranges = rk808_buck_voltage_ranges,
 129                 .n_linear_ranges = ARRAY_SIZE(rk808_buck_voltage_ranges),
 130                 .vsel_reg = RK808_BUCK2_ON_VSEL_REG,
 131                 .vsel_mask = RK808_BUCK_VSEL_MASK,
 132                 .enable_reg = RK808_DCDC_EN_REG,
 133                 .enable_mask = BIT(1),
 134                 .owner = THIS_MODULE,
 135         }, {
 136                 .name = "DCDC_REG3",
 137                 .id = RK808_ID_DCDC3,
 138                 .ops = &rk808_switch_ops,
 139                 .type = REGULATOR_VOLTAGE,
 140                 .n_voltages = 1,
 141                 .enable_reg = RK808_DCDC_EN_REG,
 142                 .enable_mask = BIT(2),
 143                 .owner = THIS_MODULE,
 144         }, {
 145                 .name = "DCDC_REG4",
 146                 .id = RK808_ID_DCDC4,
 147                 .ops = &rk808_reg_ops,
 148                 .type = REGULATOR_VOLTAGE,
 149                 .n_voltages = 16,
 150                 .linear_ranges = rk808_buck4_voltage_ranges,
 151                 .n_linear_ranges = ARRAY_SIZE(rk808_buck4_voltage_ranges),
 152                 .vsel_reg = RK808_BUCK4_ON_VSEL_REG,
 153                 .vsel_mask = RK808_BUCK4_VSEL_MASK,
 154                 .enable_reg = RK808_DCDC_EN_REG,
 155                 .enable_mask = BIT(3),
 156                 .owner = THIS_MODULE,
 157         }, {
 158                 .name = "LDO_REG1",
 159                 .id = RK808_ID_LDO1,
 160                 .ops = &rk808_reg_ops,
 161                 .type = REGULATOR_VOLTAGE,
 162                 .n_voltages = 17,
 163                 .linear_ranges = rk808_ldo_voltage_ranges,
 164                 .n_linear_ranges = ARRAY_SIZE(rk808_ldo_voltage_ranges),
 165                 .vsel_reg = RK808_LDO1_ON_VSEL_REG,
 166                 .vsel_mask = RK808_LDO_VSEL_MASK,
 167                 .enable_reg = RK808_LDO_EN_REG,
 168                 .enable_mask = BIT(0),
 169                 .owner = THIS_MODULE,
 170         }, {
 171                 .name = "LDO_REG2",
 172                 .id = RK808_ID_LDO2,
 173                 .ops = &rk808_reg_ops,
 174                 .type = REGULATOR_VOLTAGE,
 175                 .n_voltages = 17,
 176                 .linear_ranges = rk808_ldo_voltage_ranges,
 177                 .n_linear_ranges = ARRAY_SIZE(rk808_ldo_voltage_ranges),
 178                 .vsel_reg = RK808_LDO2_ON_VSEL_REG,
 179                 .vsel_mask = RK808_LDO_VSEL_MASK,
 180                 .enable_reg = RK808_LDO_EN_REG,
 181                 .enable_mask = BIT(1),
 182                 .owner = THIS_MODULE,
 183         }, {
 184                 .name = "LDO_REG3",
 185                 .id = RK808_ID_LDO3,
 186                 .ops = &rk808_reg_ops,
 187                 .type = REGULATOR_VOLTAGE,
 188                 .n_voltages = 16,
 189                 .linear_ranges = rk808_ldo3_voltage_ranges,
 190                 .n_linear_ranges = ARRAY_SIZE(rk808_ldo3_voltage_ranges),
 191                 .vsel_reg = RK808_LDO3_ON_VSEL_REG,
 192                 .vsel_mask = RK808_BUCK4_VSEL_MASK,
 193                 .enable_reg = RK808_LDO_EN_REG,
 194                 .enable_mask = BIT(2),
 195                 .owner = THIS_MODULE,
 196         }, {
 197                 .name = "LDO_REG4",
 198                 .id = RK808_ID_LDO4,
 199                 .ops = &rk808_reg_ops,
 200                 .type = REGULATOR_VOLTAGE,
 201                 .n_voltages = 17,
 202                 .linear_ranges = rk808_ldo_voltage_ranges,
 203                 .n_linear_ranges = ARRAY_SIZE(rk808_ldo_voltage_ranges),
 204                 .vsel_reg = RK808_LDO4_ON_VSEL_REG,
 205                 .vsel_mask = RK808_LDO_VSEL_MASK,
 206                 .enable_reg = RK808_LDO_EN_REG,
 207                 .enable_mask = BIT(3),
 208                 .owner = THIS_MODULE,
 209         }, {
 210                 .name = "LDO_REG5",
 211                 .id = RK808_ID_LDO5,
 212                 .ops = &rk808_reg_ops,
 213                 .type = REGULATOR_VOLTAGE,
 214                 .n_voltages = 17,
 215                 .linear_ranges = rk808_ldo_voltage_ranges,
 216                 .n_linear_ranges = ARRAY_SIZE(rk808_ldo_voltage_ranges),
 217                 .vsel_reg = RK808_LDO5_ON_VSEL_REG,
 218                 .vsel_mask = RK808_LDO_VSEL_MASK,
 219                 .enable_reg = RK808_LDO_EN_REG,
 220                 .enable_mask = BIT(4),
 221                 .owner = THIS_MODULE,
 222         }, {
 223                 .name = "LDO_REG6",
 224                 .id = RK808_ID_LDO6,
 225                 .ops = &rk808_reg_ops,
 226                 .type = REGULATOR_VOLTAGE,
 227                 .n_voltages = 18,
 228                 .linear_ranges = rk808_ldo6_voltage_ranges,
 229                 .n_linear_ranges = ARRAY_SIZE(rk808_ldo6_voltage_ranges),
 230                 .vsel_reg = RK808_LDO6_ON_VSEL_REG,
 231                 .vsel_mask = RK808_LDO_VSEL_MASK,
 232                 .enable_reg = RK808_LDO_EN_REG,
 233                 .enable_mask = BIT(5),
 234                 .owner = THIS_MODULE,
 235         }, {
 236                 .name = "LDO_REG7",
 237                 .id = RK808_ID_LDO7,
 238                 .ops = &rk808_reg_ops,
 239                 .type = REGULATOR_VOLTAGE,
 240                 .n_voltages = 18,
 241                 .linear_ranges = rk808_ldo6_voltage_ranges,
 242                 .n_linear_ranges = ARRAY_SIZE(rk808_ldo6_voltage_ranges),
 243                 .vsel_reg = RK808_LDO7_ON_VSEL_REG,
 244                 .vsel_mask = RK808_LDO_VSEL_MASK,
 245                 .enable_reg = RK808_LDO_EN_REG,
 246                 .enable_mask = BIT(6),
 247                 .owner = THIS_MODULE,
 248         }, {
 249                 .name = "LDO_REG8",
 250                 .id = RK808_ID_LDO8,
 251                 .ops = &rk808_reg_ops,
 252                 .type = REGULATOR_VOLTAGE,
 253                 .n_voltages = 17,
 254                 .linear_ranges = rk808_ldo_voltage_ranges,
 255                 .n_linear_ranges = ARRAY_SIZE(rk808_ldo_voltage_ranges),
 256                 .vsel_reg = RK808_LDO8_ON_VSEL_REG,
 257                 .vsel_mask = RK808_LDO_VSEL_MASK,
 258                 .enable_reg = RK808_LDO_EN_REG,
 259                 .enable_mask = BIT(7),
 260                 .owner = THIS_MODULE,
 261         }, {
 262                 .name = "SWITCH_REG1",
 263                 .id = RK808_ID_SWITCH1,
 264                 .ops = &rk808_switch_ops,
 265                 .type = REGULATOR_VOLTAGE,
 266                 .enable_reg = RK808_DCDC_EN_REG,
 267                 .enable_mask = BIT(5),
 268                 .owner = THIS_MODULE,
 269         }, {
 270                 .name = "SWITCH_REG2",
 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_dts(struct i2c_client *client,
 298                                struct rk808_board *pdata)
 299 {
 300         struct device_node *np, *reg_np;
 301         int i, ret;
 302
 303         np = client->dev.of_node;
 304         if (!np) {
 305                 dev_err(&client->dev, "could not find pmic sub-node\n");
 306                 return -ENXIO;
 307         }
 308
 309         reg_np = of_get_child_by_name(np, "regulators");
 310         if (!reg_np)
 311                 return -ENXIO;
 312
 313         ret = of_regulator_match(&client->dev, reg_np, rk808_reg_matches,
 314                                  RK808_NUM_REGULATORS);
 315         if (ret < 0) {
 316                 dev_err(&client->dev,
 317                         "failed to parse regulator data: %d\n", ret);
 318                 return ret;
 319         }
 320
 321         for (i = 0; i < RK808_NUM_REGULATORS; i++) {
 322                 if (!rk808_reg_matches[i].init_data ||
 323                     !rk808_reg_matches[i].of_node)
 324                         continue;
 325
 326                 pdata->rk808_init_data[i] = rk808_reg_matches[i].init_data;
 327                 pdata->of_node[i] = rk808_reg_matches[i].of_node;
 328         }
 329
 330         return 0;
 331 }
 332
 333 static int rk808_regulator_probe(struct platform_device *pdev)
 334 {
 335         struct rk808 *rk808 = dev_get_drvdata(pdev->dev.parent);
 336         struct i2c_client *client = rk808->i2c;
 337         struct rk808_board *pdata = dev_get_platdata(&client->dev);
 338         struct regulator_config config = {};
 339         struct regulator_dev *rk808_rdev;
 340         struct regulator_init_data *reg_data;
 341         int i = 0;
 342         int ret = 0;
 343
 344         if (!pdata) {
 345                 pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
 346                 if (!pdata)
 347                         return -ENOMEM;
 348         }
 349
 350         ret = rk808_regulator_dts(client, pdata);
 351         if (ret)
 352                 return ret;
 353
 354         /* Instantiate the regulators */
 355         for (i = 0; i < RK808_NUM_REGULATORS; i++) {
 356                 reg_data = pdata->rk808_init_data[i];
 357                 if (!reg_data)
 358                         continue;
 359
 360                 config.dev = &client->dev;
 361                 config.driver_data = rk808;
 362                 config.regmap = rk808->regmap;
 363
 364                 if (client->dev.of_node)
 365                         config.of_node = pdata->of_node[i];
 366
 367                 reg_data->supply_regulator = rk808_reg[i].name;
 368                 config.init_data = reg_data;
 369
 370                 rk808_rdev = devm_regulator_register(&pdev->dev,
 371                                                      &rk808_reg[i], &config);
 372                 if (IS_ERR(rk808_rdev)) {
 373                         dev_err(&client->dev,
 374                                 "failed to register %d regulator\n", i);
 375                         return PTR_ERR(rk808_rdev);
 376                 }
 377         }
 378         return 0;
 379 }
 380
 381 static struct platform_driver rk808_regulator_driver = {
 382         .probe = rk808_regulator_probe,
 383         .driver = {
 384                 .name = "rk808-regulator",
 385                 .owner = THIS_MODULE,
 386         },
 387 };
 388
 389 module_platform_driver(rk808_regulator_driver);
 390
 391 MODULE_DESCRIPTION("regulator driver for the rk808 series PMICs");
 392 MODULE_AUTHOR("Chris Zhong<zyw@rock-chips.com>");
 393 MODULE_AUTHOR("Zhang Qing<zhanqging@rock-chips.com>");
 394 MODULE_LICENSE("GPL");
 395 MODULE_ALIAS("platform:rk808-regulator");