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                 .supply_name = "vcc1",
 112                 .id = RK808_ID_DCDC1,
 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_BUCK1_ON_VSEL_REG,
 119                 .vsel_mask = RK808_BUCK_VSEL_MASK,
 120                 .enable_reg = RK808_DCDC_EN_REG,
 121                 .enable_mask = BIT(0),
 122                 .owner = THIS_MODULE,
 123         }, {
 124                 .name = "DCDC_REG2",
 125                 .supply_name = "vcc2",
 126                 .id = RK808_ID_DCDC2,
 127                 .ops = &rk808_reg_ops,
 128                 .type = REGULATOR_VOLTAGE,
 129                 .n_voltages = 64,
 130                 .linear_ranges = rk808_buck_voltage_ranges,
 131                 .n_linear_ranges = ARRAY_SIZE(rk808_buck_voltage_ranges),
 132                 .vsel_reg = RK808_BUCK2_ON_VSEL_REG,
 133                 .vsel_mask = RK808_BUCK_VSEL_MASK,
 134                 .enable_reg = RK808_DCDC_EN_REG,
 135                 .enable_mask = BIT(1),
 136                 .owner = THIS_MODULE,
 137         }, {
 138                 .name = "DCDC_REG3",
 139                 .supply_name = "vcc3",
 140                 .id = RK808_ID_DCDC3,
 141                 .ops = &rk808_switch_ops,
 142                 .type = REGULATOR_VOLTAGE,
 143                 .n_voltages = 1,
 144                 .enable_reg = RK808_DCDC_EN_REG,
 145                 .enable_mask = BIT(2),
 146                 .owner = THIS_MODULE,
 147         }, {
 148                 .name = "DCDC_REG4",
 149                 .supply_name = "vcc4",
 150                 .id = RK808_ID_DCDC4,
 151                 .ops = &rk808_reg_ops,
 152                 .type = REGULATOR_VOLTAGE,
 153                 .n_voltages = 16,
 154                 .linear_ranges = rk808_buck4_voltage_ranges,
 155                 .n_linear_ranges = ARRAY_SIZE(rk808_buck4_voltage_ranges),
 156                 .vsel_reg = RK808_BUCK4_ON_VSEL_REG,
 157                 .vsel_mask = RK808_BUCK4_VSEL_MASK,
 158                 .enable_reg = RK808_DCDC_EN_REG,
 159                 .enable_mask = BIT(3),
 160                 .owner = THIS_MODULE,
 161         }, {
 162                 .name = "LDO_REG1",
 163                 .supply_name = "vcc6",
 164                 .id = RK808_ID_LDO1,
 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_LDO1_ON_VSEL_REG,
 171                 .vsel_mask = RK808_LDO_VSEL_MASK,
 172                 .enable_reg = RK808_LDO_EN_REG,
 173                 .enable_mask = BIT(0),
 174                 .owner = THIS_MODULE,
 175         }, {
 176                 .name = "LDO_REG2",
 177                 .supply_name = "vcc6",
 178                 .id = RK808_ID_LDO2,
 179                 .ops = &rk808_reg_ops,
 180                 .type = REGULATOR_VOLTAGE,
 181                 .n_voltages = 17,
 182                 .linear_ranges = rk808_ldo_voltage_ranges,
 183                 .n_linear_ranges = ARRAY_SIZE(rk808_ldo_voltage_ranges),
 184                 .vsel_reg = RK808_LDO2_ON_VSEL_REG,
 185                 .vsel_mask = RK808_LDO_VSEL_MASK,
 186                 .enable_reg = RK808_LDO_EN_REG,
 187                 .enable_mask = BIT(1),
 188                 .owner = THIS_MODULE,
 189         }, {
 190                 .name = "LDO_REG3",
 191                 .supply_name = "vcc7",
 192                 .id = RK808_ID_LDO3,
 193                 .ops = &rk808_reg_ops,
 194                 .type = REGULATOR_VOLTAGE,
 195                 .n_voltages = 16,
 196                 .linear_ranges = rk808_ldo3_voltage_ranges,
 197                 .n_linear_ranges = ARRAY_SIZE(rk808_ldo3_voltage_ranges),
 198                 .vsel_reg = RK808_LDO3_ON_VSEL_REG,
 199                 .vsel_mask = RK808_BUCK4_VSEL_MASK,
 200                 .enable_reg = RK808_LDO_EN_REG,
 201                 .enable_mask = BIT(2),
 202                 .owner = THIS_MODULE,
 203         }, {
 204                 .name = "LDO_REG4",
 205                 .supply_name = "vcc9",
 206                 .id = RK808_ID_LDO4,
 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_LDO4_ON_VSEL_REG,
 213                 .vsel_mask = RK808_LDO_VSEL_MASK,
 214                 .enable_reg = RK808_LDO_EN_REG,
 215                 .enable_mask = BIT(3),
 216                 .owner = THIS_MODULE,
 217         }, {
 218                 .name = "LDO_REG5",
 219                 .supply_name = "vcc9",
 220                 .id = RK808_ID_LDO5,
 221                 .ops = &rk808_reg_ops,
 222                 .type = REGULATOR_VOLTAGE,
 223                 .n_voltages = 17,
 224                 .linear_ranges = rk808_ldo_voltage_ranges,
 225                 .n_linear_ranges = ARRAY_SIZE(rk808_ldo_voltage_ranges),
 226                 .vsel_reg = RK808_LDO5_ON_VSEL_REG,
 227                 .vsel_mask = RK808_LDO_VSEL_MASK,
 228                 .enable_reg = RK808_LDO_EN_REG,
 229                 .enable_mask = BIT(4),
 230                 .owner = THIS_MODULE,
 231         }, {
 232                 .name = "LDO_REG6",
 233                 .supply_name = "vcc10",
 234                 .id = RK808_ID_LDO6,
 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_LDO6_ON_VSEL_REG,
 241                 .vsel_mask = RK808_LDO_VSEL_MASK,
 242                 .enable_reg = RK808_LDO_EN_REG,
 243                 .enable_mask = BIT(5),
 244                 .owner = THIS_MODULE,
 245         }, {
 246                 .name = "LDO_REG7",
 247                 .supply_name = "vcc7",
 248                 .id = RK808_ID_LDO7,
 249                 .ops = &rk808_reg_ops,
 250                 .type = REGULATOR_VOLTAGE,
 251                 .n_voltages = 18,
 252                 .linear_ranges = rk808_ldo6_voltage_ranges,
 253                 .n_linear_ranges = ARRAY_SIZE(rk808_ldo6_voltage_ranges),
 254                 .vsel_reg = RK808_LDO7_ON_VSEL_REG,
 255                 .vsel_mask = RK808_LDO_VSEL_MASK,
 256                 .enable_reg = RK808_LDO_EN_REG,
 257                 .enable_mask = BIT(6),
 258                 .owner = THIS_MODULE,
 259         }, {
 260                 .name = "LDO_REG8",
 261                 .supply_name = "vcc11",
 262                 .id = RK808_ID_LDO8,
 263                 .ops = &rk808_reg_ops,
 264                 .type = REGULATOR_VOLTAGE,
 265                 .n_voltages = 17,
 266                 .linear_ranges = rk808_ldo_voltage_ranges,
 267                 .n_linear_ranges = ARRAY_SIZE(rk808_ldo_voltage_ranges),
 268                 .vsel_reg = RK808_LDO8_ON_VSEL_REG,
 269                 .vsel_mask = RK808_LDO_VSEL_MASK,
 270                 .enable_reg = RK808_LDO_EN_REG,
 271                 .enable_mask = BIT(7),
 272                 .owner = THIS_MODULE,
 273         }, {
 274                 .name = "SWITCH_REG1",
 275                 .supply_name = "vcc8",
 276                 .id = RK808_ID_SWITCH1,
 277                 .ops = &rk808_switch_ops,
 278                 .type = REGULATOR_VOLTAGE,
 279                 .enable_reg = RK808_DCDC_EN_REG,
 280                 .enable_mask = BIT(5),
 281                 .owner = THIS_MODULE,
 282         }, {
 283                 .name = "SWITCH_REG2",
 284                 .supply_name = "vcc12",
 285                 .id = RK808_ID_SWITCH2,
 286                 .ops = &rk808_switch_ops,
 287                 .type = REGULATOR_VOLTAGE,
 288                 .enable_reg = RK808_DCDC_EN_REG,
 289                 .enable_mask = BIT(6),
 290                 .owner = THIS_MODULE,
 291         },
 292 };
 293
 294 static struct of_regulator_match rk808_reg_matches[] = {
 295         [RK808_ID_DCDC1]        = { .name = "DCDC_REG1" },
 296         [RK808_ID_DCDC2]        = { .name = "DCDC_REG2" },
 297         [RK808_ID_DCDC3]        = { .name = "DCDC_REG3" },
 298         [RK808_ID_DCDC4]        = { .name = "DCDC_REG4" },
 299         [RK808_ID_LDO1]         = { .name = "LDO_REG1" },
 300         [RK808_ID_LDO2]         = { .name = "LDO_REG2" },
 301         [RK808_ID_LDO3]         = { .name = "LDO_REG3" },
 302         [RK808_ID_LDO4]         = { .name = "LDO_REG4" },
 303         [RK808_ID_LDO5]         = { .name = "LDO_REG5" },
 304         [RK808_ID_LDO6]         = { .name = "LDO_REG6" },
 305         [RK808_ID_LDO7]         = { .name = "LDO_REG7" },
 306         [RK808_ID_LDO8]         = { .name = "LDO_REG8" },
 307         [RK808_ID_SWITCH1]      = { .name = "SWITCH_REG1" },
 308         [RK808_ID_SWITCH2]      = { .name = "SWITCH_REG2" },
 309 };
 310
 311 static int rk808_regulator_dts(struct i2c_client *client,
 312                                struct rk808_board *pdata)
 313 {
 314         struct device_node *np, *reg_np;
 315         int i, ret;
 316
 317         np = client->dev.of_node;
 318         if (!np) {
 319                 dev_err(&client->dev, "could not find pmic sub-node\n");
 320                 return -ENXIO;
 321         }
 322
 323         reg_np = of_get_child_by_name(np, "regulators");
 324         if (!reg_np)
 325                 return -ENXIO;
 326
 327         ret = of_regulator_match(&client->dev, reg_np, rk808_reg_matches,
 328                                  RK808_NUM_REGULATORS);
 329         if (ret < 0) {
 330                 dev_err(&client->dev,
 331                         "failed to parse regulator data: %d\n", ret);
 332                 return ret;
 333         }
 334
 335         for (i = 0; i < RK808_NUM_REGULATORS; i++) {
 336                 if (!rk808_reg_matches[i].init_data ||
 337                     !rk808_reg_matches[i].of_node)
 338                         continue;
 339
 340                 pdata->rk808_init_data[i] = rk808_reg_matches[i].init_data;
 341                 pdata->of_node[i] = rk808_reg_matches[i].of_node;
 342         }
 343
 344         return 0;
 345 }
 346
 347 static int rk808_regulator_probe(struct platform_device *pdev)
 348 {
 349         struct rk808 *rk808 = dev_get_drvdata(pdev->dev.parent);
 350         struct i2c_client *client = rk808->i2c;
 351         struct rk808_board *pdata = dev_get_platdata(&client->dev);
 352         struct regulator_config config = {};
 353         struct regulator_dev *rk808_rdev;
 354         struct regulator_init_data *reg_data;
 355         int i = 0;
 356         int ret = 0;
 357
 358         if (!pdata) {
 359                 pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
 360                 if (!pdata)
 361                         return -ENOMEM;
 362         }
 363
 364         ret = rk808_regulator_dts(client, pdata);
 365         if (ret)
 366                 return ret;
 367
 368         /* Instantiate the regulators */
 369         for (i = 0; i < RK808_NUM_REGULATORS; i++) {
 370                 reg_data = pdata->rk808_init_data[i];
 371                 if (!reg_data)
 372                         continue;
 373
 374                 config.dev = &client->dev;
 375                 config.driver_data = rk808;
 376                 config.regmap = rk808->regmap;
 377
 378                 if (client->dev.of_node)
 379                         config.of_node = pdata->of_node[i];
 380
 381                 config.init_data = reg_data;
 382
 383                 rk808_rdev = devm_regulator_register(&pdev->dev,
 384                                                      &rk808_reg[i], &config);
 385                 if (IS_ERR(rk808_rdev)) {
 386                         dev_err(&client->dev,
 387                                 "failed to register %d regulator\n", i);
 388                         return PTR_ERR(rk808_rdev);
 389                 }
 390         }
 391         return 0;
 392 }
 393
 394 static struct platform_driver rk808_regulator_driver = {
 395         .probe = rk808_regulator_probe,
 396         .driver = {
 397                 .name = "rk808-regulator",
 398                 .owner = THIS_MODULE,
 399         },
 400 };
 401
 402 module_platform_driver(rk808_regulator_driver);
 403
 404 MODULE_DESCRIPTION("regulator driver for the rk808 series PMICs");
 405 MODULE_AUTHOR("Chris Zhong<zyw@rock-chips.com>");
 406 MODULE_AUTHOR("Zhang Qing<zhanqging@rock-chips.com>");
 407 MODULE_LICENSE("GPL");
 408 MODULE_ALIAS("platform:rk808-regulator");