drivers/regulator/tps65218-regulator.c

   1 /*
   2  * tps65218-regulator.c
   3  *
   4  * Regulator driver for TPS65218 PMIC
   5  *
   6  * Copyright (C) 2014 Texas Instruments Incorporated - http://www.ti.com/
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed "as is" WITHOUT ANY WARRANTY of any
  13  * kind, whether expressed or implied; without even the implied warranty
  14  * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License version 2 for more details.
  16  */
  17
  18 #include <linux/kernel.h>
  19 #include <linux/module.h>
  20 #include <linux/device.h>
  21 #include <linux/init.h>
  22 #include <linux/err.h>
  23 #include <linux/platform_device.h>
  24 #include <linux/of_device.h>
  25 #include <linux/regulator/of_regulator.h>
  26 #include <linux/regulator/driver.h>
  27 #include <linux/regulator/machine.h>
  28 #include <linux/mfd/tps65218.h>
  29
  30 enum tps65218_regulators { DCDC1, DCDC2, DCDC3, DCDC4,
  31                            DCDC5, DCDC6, LDO1, LS3 };
  32
  33 #define TPS65218_REGULATOR(_name, _id, _type, _ops, _n, _vr, _vm, _er, _em, \
  34                             _cr, _cm, _lr, _nlr, _delay, _fuv)          \
  35         {                                                       \
  36                 .name                   = _name,                \
  37                 .id                     = _id,                  \
  38                 .ops                    = &_ops,                \
  39                 .n_voltages             = _n,                   \
  40                 .type                   = _type,        \
  41                 .owner                  = THIS_MODULE,          \
  42                 .vsel_reg               = _vr,                  \
  43                 .vsel_mask              = _vm,                  \
  44                 .csel_reg               = _cr,                  \
  45                 .csel_mask              = _cm,                  \
  46                 .enable_reg             = _er,                  \
  47                 .enable_mask            = _em,                  \
  48                 .volt_table             = NULL,                 \
  49                 .linear_ranges          = _lr,                  \
  50                 .n_linear_ranges        = _nlr,                 \
  51                 .ramp_delay             = _delay,               \
  52                 .fixed_uV               = _fuv                  \
  53         }                                                       \
  54
  55 #define TPS65218_INFO(_id, _nm, _min, _max)     \
  56         [_id] = {                                       \
  57                 .id             = _id,                  \
  58                 .name           = _nm,                  \
  59                 .min_uV         = _min,                 \
  60                 .max_uV         = _max,                 \
  61         }
  62
  63 static const struct regulator_linear_range dcdc1_dcdc2_ranges[] = {
  64         REGULATOR_LINEAR_RANGE(850000, 0x0, 0x32, 10000),
  65         REGULATOR_LINEAR_RANGE(1375000, 0x33, 0x3f, 25000),
  66 };
  67
  68 static const struct regulator_linear_range ldo1_dcdc3_ranges[] = {
  69         REGULATOR_LINEAR_RANGE(900000, 0x0, 0x1a, 25000),
  70         REGULATOR_LINEAR_RANGE(1600000, 0x1b, 0x3f, 50000),
  71 };
  72
  73 static const struct regulator_linear_range dcdc4_ranges[] = {
  74         REGULATOR_LINEAR_RANGE(1175000, 0x0, 0xf, 25000),
  75         REGULATOR_LINEAR_RANGE(1600000, 0x10, 0x34, 50000),
  76 };
  77
  78 static struct tps_info tps65218_pmic_regs[] = {
  79         TPS65218_INFO(DCDC1, "DCDC1", 850000, 1675000),
  80         TPS65218_INFO(DCDC2, "DCDC2", 850000, 1675000),
  81         TPS65218_INFO(DCDC3, "DCDC3", 900000, 3400000),
  82         TPS65218_INFO(DCDC4, "DCDC4", 1175000, 3400000),
  83         TPS65218_INFO(DCDC5, "DCDC5", 1000000, 1000000),
  84         TPS65218_INFO(DCDC6, "DCDC6", 1800000, 1800000),
  85         TPS65218_INFO(LDO1, "LDO1", 900000, 3400000),
  86         TPS65218_INFO(LS3, "LS3", -1, -1),
  87 };
  88
  89 #define TPS65218_OF_MATCH(comp, label) \
  90         { \
  91                 .compatible = comp, \
  92                 .data = &label, \
  93         }
  94
  95 static const struct of_device_id tps65218_of_match[] = {
  96         TPS65218_OF_MATCH("ti,tps65218-dcdc1", tps65218_pmic_regs[DCDC1]),
  97         TPS65218_OF_MATCH("ti,tps65218-dcdc2", tps65218_pmic_regs[DCDC2]),
  98         TPS65218_OF_MATCH("ti,tps65218-dcdc3", tps65218_pmic_regs[DCDC3]),
  99         TPS65218_OF_MATCH("ti,tps65218-dcdc4", tps65218_pmic_regs[DCDC4]),
 100         TPS65218_OF_MATCH("ti,tps65218-dcdc5", tps65218_pmic_regs[DCDC5]),
 101         TPS65218_OF_MATCH("ti,tps65218-dcdc6", tps65218_pmic_regs[DCDC6]),
 102         TPS65218_OF_MATCH("ti,tps65218-ldo1", tps65218_pmic_regs[LDO1]),
 103         TPS65218_OF_MATCH("ti,tps65218-ls3", tps65218_pmic_regs[LS3]),
 104         { }
 105 };
 106 MODULE_DEVICE_TABLE(of, tps65218_of_match);
 107
 108 static int tps65218_pmic_set_voltage_sel(struct regulator_dev *dev,
 109                                          unsigned selector)
 110 {
 111         int ret;
 112         struct tps65218 *tps = rdev_get_drvdata(dev);
 113         unsigned int rid = rdev_get_id(dev);
 114
 115         /* Set the voltage based on vsel value and write protect level is 2 */
 116         ret = tps65218_set_bits(tps, dev->desc->vsel_reg, dev->desc->vsel_mask,
 117                                 selector, TPS65218_PROTECT_L1);
 118
 119         /* Set GO bit for DCDC1/2 to initiate voltage transistion */
 120         switch (rid) {
 121         case TPS65218_DCDC_1:
 122         case TPS65218_DCDC_2:
 123                 ret = tps65218_set_bits(tps, TPS65218_REG_CONTRL_SLEW_RATE,
 124                                         TPS65218_SLEW_RATE_GO,
 125                                         TPS65218_SLEW_RATE_GO,
 126                                         TPS65218_PROTECT_L1);
 127                 break;
 128         }
 129
 130         return ret;
 131 }
 132
 133 static int tps65218_pmic_enable(struct regulator_dev *dev)
 134 {
 135         struct tps65218 *tps = rdev_get_drvdata(dev);
 136         int rid = rdev_get_id(dev);
 137
 138         if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1)
 139                 return -EINVAL;
 140
 141         /* Enable the regulator and password protection is level 1 */
 142         return tps65218_set_bits(tps, dev->desc->enable_reg,
 143                                  dev->desc->enable_mask, dev->desc->enable_mask,
 144                                  TPS65218_PROTECT_L1);
 145 }
 146
 147 static int tps65218_pmic_disable(struct regulator_dev *dev)
 148 {
 149         struct tps65218 *tps = rdev_get_drvdata(dev);
 150         int rid = rdev_get_id(dev);
 151
 152         if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1)
 153                 return -EINVAL;
 154
 155         /* Disable the regulator and password protection is level 1 */
 156         return tps65218_clear_bits(tps, dev->desc->enable_reg,
 157                                    dev->desc->enable_mask, TPS65218_PROTECT_L1);
 158 }
 159
 160 /* Operations permitted on DCDC1, DCDC2 */
 161 static struct regulator_ops tps65218_dcdc12_ops = {
 162         .is_enabled             = regulator_is_enabled_regmap,
 163         .enable                 = tps65218_pmic_enable,
 164         .disable                = tps65218_pmic_disable,
 165         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 166         .set_voltage_sel        = tps65218_pmic_set_voltage_sel,
 167         .list_voltage           = regulator_list_voltage_linear_range,
 168         .map_voltage            = regulator_map_voltage_linear_range,
 169         .set_voltage_time_sel   = regulator_set_voltage_time_sel,
 170 };
 171
 172 /* Operations permitted on DCDC3, DCDC4 and LDO1 */
 173 static struct regulator_ops tps65218_ldo1_dcdc34_ops = {
 174         .is_enabled             = regulator_is_enabled_regmap,
 175         .enable                 = tps65218_pmic_enable,
 176         .disable                = tps65218_pmic_disable,
 177         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 178         .set_voltage_sel        = tps65218_pmic_set_voltage_sel,
 179         .list_voltage           = regulator_list_voltage_linear_range,
 180         .map_voltage            = regulator_map_voltage_linear_range,
 181 };
 182
 183 static const int ls3_currents[] = { 100, 200, 500, 1000 };
 184
 185 static int tps65218_pmic_set_input_current_lim(struct regulator_dev *dev,
 186                                                int lim_uA)
 187 {
 188         unsigned int index = 0;
 189         unsigned int num_currents = ARRAY_SIZE(ls3_currents);
 190         struct tps65218 *tps = rdev_get_drvdata(dev);
 191
 192         while (index < num_currents && ls3_currents[index] != lim_uA)
 193                 index++;
 194
 195         if (index == num_currents)
 196                 return -EINVAL;
 197
 198         return tps65218_set_bits(tps, dev->desc->csel_reg, dev->desc->csel_mask,
 199                                  index << 2, TPS65218_PROTECT_L1);
 200 }
 201
 202 static int tps65218_pmic_set_current_limit(struct regulator_dev *dev,
 203                                            int min_uA, int max_uA)
 204 {
 205         int index = 0;
 206         unsigned int num_currents = ARRAY_SIZE(ls3_currents);
 207         struct tps65218 *tps = rdev_get_drvdata(dev);
 208
 209         while (index < num_currents && ls3_currents[index] < max_uA)
 210                 index++;
 211
 212         index--;
 213
 214         if (index < 0 || ls3_currents[index] < min_uA)
 215                 return -EINVAL;
 216
 217         return tps65218_set_bits(tps, dev->desc->csel_reg, dev->desc->csel_mask,
 218                                  index << 2, TPS65218_PROTECT_L1);
 219 }
 220
 221 static int tps65218_pmic_get_current_limit(struct regulator_dev *dev)
 222 {
 223         int retval;
 224         unsigned int index;
 225         struct tps65218 *tps = rdev_get_drvdata(dev);
 226
 227         retval = tps65218_reg_read(tps, dev->desc->csel_reg, &index);
 228         if (retval < 0)
 229                 return retval;
 230
 231         index = (index & dev->desc->csel_mask) >> 2;
 232
 233         return ls3_currents[index];
 234 }
 235
 236 static struct regulator_ops tps65218_ls3_ops = {
 237         .is_enabled             = regulator_is_enabled_regmap,
 238         .enable                 = tps65218_pmic_enable,
 239         .disable                = tps65218_pmic_disable,
 240         .set_input_current_limit = tps65218_pmic_set_input_current_lim,
 241         .set_current_limit      = tps65218_pmic_set_current_limit,
 242         .get_current_limit      = tps65218_pmic_get_current_limit,
 243 };
 244
 245 /* Operations permitted on DCDC5, DCDC6 */
 246 static struct regulator_ops tps65218_dcdc56_pmic_ops = {
 247         .is_enabled             = regulator_is_enabled_regmap,
 248         .enable                 = tps65218_pmic_enable,
 249         .disable                = tps65218_pmic_disable,
 250 };
 251
 252 static const struct regulator_desc regulators[] = {
 253         TPS65218_REGULATOR("DCDC1", TPS65218_DCDC_1, REGULATOR_VOLTAGE,
 254                            tps65218_dcdc12_ops, 64, TPS65218_REG_CONTROL_DCDC1,
 255                            TPS65218_CONTROL_DCDC1_MASK, TPS65218_REG_ENABLE1,
 256                            TPS65218_ENABLE1_DC1_EN, 0, 0, dcdc1_dcdc2_ranges,
 257                            2, 4000, 0),
 258         TPS65218_REGULATOR("DCDC2", TPS65218_DCDC_2, REGULATOR_VOLTAGE,
 259                            tps65218_dcdc12_ops, 64, TPS65218_REG_CONTROL_DCDC2,
 260                            TPS65218_CONTROL_DCDC2_MASK, TPS65218_REG_ENABLE1,
 261                            TPS65218_ENABLE1_DC2_EN, 0, 0, dcdc1_dcdc2_ranges,
 262                            2, 4000, 0),
 263         TPS65218_REGULATOR("DCDC3", TPS65218_DCDC_3, REGULATOR_VOLTAGE,
 264                            tps65218_ldo1_dcdc34_ops, 64,
 265                            TPS65218_REG_CONTROL_DCDC3,
 266                            TPS65218_CONTROL_DCDC3_MASK, TPS65218_REG_ENABLE1,
 267                            TPS65218_ENABLE1_DC3_EN, 0, 0, ldo1_dcdc3_ranges, 2,
 268                            0, 0),
 269         TPS65218_REGULATOR("DCDC4", TPS65218_DCDC_4, REGULATOR_VOLTAGE,
 270                            tps65218_ldo1_dcdc34_ops, 53,
 271                            TPS65218_REG_CONTROL_DCDC4,
 272                            TPS65218_CONTROL_DCDC4_MASK, TPS65218_REG_ENABLE1,
 273                            TPS65218_ENABLE1_DC4_EN, 0, 0, dcdc4_ranges, 2,
 274                            0, 0),
 275         TPS65218_REGULATOR("DCDC5", TPS65218_DCDC_5, REGULATOR_VOLTAGE,
 276                            tps65218_dcdc56_pmic_ops, 1, -1, -1,
 277                            TPS65218_REG_ENABLE1, TPS65218_ENABLE1_DC5_EN, 0, 0,
 278                            NULL, 0, 0, 1000000),
 279         TPS65218_REGULATOR("DCDC6", TPS65218_DCDC_6, REGULATOR_VOLTAGE,
 280                            tps65218_dcdc56_pmic_ops, 1, -1, -1,
 281                            TPS65218_REG_ENABLE1, TPS65218_ENABLE1_DC6_EN, 0, 0,
 282                            NULL, 0, 0, 1800000),
 283         TPS65218_REGULATOR("LDO1", TPS65218_LDO_1, REGULATOR_VOLTAGE,
 284                            tps65218_ldo1_dcdc34_ops, 64,
 285                            TPS65218_REG_CONTROL_LDO1,
 286                            TPS65218_CONTROL_LDO1_MASK, TPS65218_REG_ENABLE2,
 287                            TPS65218_ENABLE2_LDO1_EN, 0, 0, ldo1_dcdc3_ranges,
 288                            2, 0, 0),
 289         TPS65218_REGULATOR("LS3", TPS65218_LS_3, REGULATOR_CURRENT,
 290                            tps65218_ls3_ops, 0, 0, 0, TPS65218_REG_ENABLE2,
 291                            TPS65218_ENABLE2_LS3_EN, TPS65218_REG_CONFIG2,
 292                            TPS65218_CONFIG2_LS3ILIM_MASK, NULL, 0, 0, 0),
 293 };
 294
 295 static int tps65218_regulator_probe(struct platform_device *pdev)
 296 {
 297         struct tps65218 *tps = dev_get_drvdata(pdev->dev.parent);
 298         struct regulator_init_data *init_data;
 299         const struct tps_info   *template;
 300         struct regulator_dev *rdev;
 301         const struct of_device_id       *match;
 302         struct regulator_config config = { };
 303         int id;
 304
 305         match = of_match_device(tps65218_of_match, &pdev->dev);
 306         if (!match)
 307                 return -ENODEV;
 308
 309         template = match->data;
 310         id = template->id;
 311         init_data = of_get_regulator_init_data(&pdev->dev, pdev->dev.of_node,
 312                                                &regulators[id]);
 313
 314         platform_set_drvdata(pdev, tps);
 315
 316         tps->info[id] = &tps65218_pmic_regs[id];
 317         config.dev = &pdev->dev;
 318         config.init_data = init_data;
 319         config.driver_data = tps;
 320         config.regmap = tps->regmap;
 321         config.of_node = pdev->dev.of_node;
 322
 323         rdev = devm_regulator_register(&pdev->dev, &regulators[id], &config);
 324         if (IS_ERR(rdev)) {
 325                 dev_err(tps->dev, "failed to register %s regulator\n",
 326                         pdev->name);
 327                 return PTR_ERR(rdev);
 328         }
 329
 330         return 0;
 331 }
 332
 333 static struct platform_driver tps65218_regulator_driver = {
 334         .driver = {
 335                 .name = "tps65218-pmic",
 336                 .of_match_table = tps65218_of_match,
 337         },
 338         .probe = tps65218_regulator_probe,
 339 };
 340
 341 module_platform_driver(tps65218_regulator_driver);
 342
 343 MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>");
 344 MODULE_DESCRIPTION("TPS65218 voltage regulator driver");
 345 MODULE_ALIAS("platform:tps65218-pmic");
 346 MODULE_LICENSE("GPL v2");