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