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, _sr, _sm) \
  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                 .bypass_reg     = _sr,                          \
  54                 .bypass_mask    = _sm,                          \
  55         }                                                       \
  56
  57 #define TPS65218_INFO(_id, _nm, _min, _max)     \
  58         [_id] = {                                       \
  59                 .id             = _id,                  \
  60                 .name           = _nm,                  \
  61                 .min_uV         = _min,                 \
  62                 .max_uV         = _max,                 \
  63         }
  64
  65 static const struct regulator_linear_range dcdc1_dcdc2_ranges[] = {
  66         REGULATOR_LINEAR_RANGE(850000, 0x0, 0x32, 10000),
  67         REGULATOR_LINEAR_RANGE(1375000, 0x33, 0x3f, 25000),
  68 };
  69
  70 static const struct regulator_linear_range ldo1_dcdc3_ranges[] = {
  71         REGULATOR_LINEAR_RANGE(900000, 0x0, 0x1a, 25000),
  72         REGULATOR_LINEAR_RANGE(1600000, 0x1b, 0x3f, 50000),
  73 };
  74
  75 static const struct regulator_linear_range dcdc4_ranges[] = {
  76         REGULATOR_LINEAR_RANGE(1175000, 0x0, 0xf, 25000),
  77         REGULATOR_LINEAR_RANGE(1600000, 0x10, 0x34, 50000),
  78 };
  79
  80 static struct tps_info tps65218_pmic_regs[] = {
  81         TPS65218_INFO(DCDC1, "DCDC1", 850000, 1675000),
  82         TPS65218_INFO(DCDC2, "DCDC2", 850000, 1675000),
  83         TPS65218_INFO(DCDC3, "DCDC3", 900000, 3400000),
  84         TPS65218_INFO(DCDC4, "DCDC4", 1175000, 3400000),
  85         TPS65218_INFO(DCDC5, "DCDC5", 1000000, 1000000),
  86         TPS65218_INFO(DCDC6, "DCDC6", 1800000, 1800000),
  87         TPS65218_INFO(LDO1, "LDO1", 900000, 3400000),
  88         TPS65218_INFO(LS3, "LS3", -1, -1),
  89 };
  90
  91 #define TPS65218_OF_MATCH(comp, label) \
  92         { \
  93                 .compatible = comp, \
  94                 .data = &label, \
  95         }
  96
  97 static const struct of_device_id tps65218_of_match[] = {
  98         TPS65218_OF_MATCH("ti,tps65218-dcdc1", tps65218_pmic_regs[DCDC1]),
  99         TPS65218_OF_MATCH("ti,tps65218-dcdc2", tps65218_pmic_regs[DCDC2]),
 100         TPS65218_OF_MATCH("ti,tps65218-dcdc3", tps65218_pmic_regs[DCDC3]),
 101         TPS65218_OF_MATCH("ti,tps65218-dcdc4", tps65218_pmic_regs[DCDC4]),
 102         TPS65218_OF_MATCH("ti,tps65218-dcdc5", tps65218_pmic_regs[DCDC5]),
 103         TPS65218_OF_MATCH("ti,tps65218-dcdc6", tps65218_pmic_regs[DCDC6]),
 104         TPS65218_OF_MATCH("ti,tps65218-ldo1", tps65218_pmic_regs[LDO1]),
 105         TPS65218_OF_MATCH("ti,tps65218-ls3", tps65218_pmic_regs[LS3]),
 106         { }
 107 };
 108 MODULE_DEVICE_TABLE(of, tps65218_of_match);
 109
 110 static int tps65218_pmic_set_voltage_sel(struct regulator_dev *dev,
 111                                          unsigned selector)
 112 {
 113         int ret;
 114         struct tps65218 *tps = rdev_get_drvdata(dev);
 115         unsigned int rid = rdev_get_id(dev);
 116
 117         /* Set the voltage based on vsel value and write protect level is 2 */
 118         ret = tps65218_set_bits(tps, dev->desc->vsel_reg, dev->desc->vsel_mask,
 119                                 selector, TPS65218_PROTECT_L1);
 120
 121         /* Set GO bit for DCDC1/2 to initiate voltage transistion */
 122         switch (rid) {
 123         case TPS65218_DCDC_1:
 124         case TPS65218_DCDC_2:
 125                 ret = tps65218_set_bits(tps, TPS65218_REG_CONTRL_SLEW_RATE,
 126                                         TPS65218_SLEW_RATE_GO,
 127                                         TPS65218_SLEW_RATE_GO,
 128                                         TPS65218_PROTECT_L1);
 129                 break;
 130         }
 131
 132         return ret;
 133 }
 134
 135 static int tps65218_pmic_enable(struct regulator_dev *dev)
 136 {
 137         struct tps65218 *tps = rdev_get_drvdata(dev);
 138         int rid = rdev_get_id(dev);
 139
 140         if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1)
 141                 return -EINVAL;
 142
 143         /* Enable the regulator and password protection is level 1 */
 144         return tps65218_set_bits(tps, dev->desc->enable_reg,
 145                                  dev->desc->enable_mask, dev->desc->enable_mask,
 146                                  TPS65218_PROTECT_L1);
 147 }
 148
 149 static int tps65218_pmic_disable(struct regulator_dev *dev)
 150 {
 151         struct tps65218 *tps = rdev_get_drvdata(dev);
 152         int rid = rdev_get_id(dev);
 153
 154         if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1)
 155                 return -EINVAL;
 156
 157         /* Disable the regulator and password protection is level 1 */
 158         return tps65218_clear_bits(tps, dev->desc->enable_reg,
 159                                    dev->desc->enable_mask, TPS65218_PROTECT_L1);
 160 }
 161
 162 static int tps65218_pmic_set_suspend_enable(struct regulator_dev *dev)
 163 {
 164         struct tps65218 *tps = rdev_get_drvdata(dev);
 165         unsigned int rid = rdev_get_id(dev);
 166
 167         if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1)
 168                 return -EINVAL;
 169
 170         return tps65218_clear_bits(tps, dev->desc->bypass_reg,
 171                                    dev->desc->bypass_mask,
 172                                    TPS65218_PROTECT_L1);
 173 }
 174
 175 static int tps65218_pmic_set_suspend_disable(struct regulator_dev *dev)
 176 {
 177         struct tps65218 *tps = rdev_get_drvdata(dev);
 178         unsigned int rid = rdev_get_id(dev);
 179
 180         if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1)
 181                 return -EINVAL;
 182
 183         /*
 184          * Certain revisions of TPS65218 will need to have DCDC3 regulator
 185          * enabled always, otherwise an immediate system reboot will occur
 186          * during poweroff.
 187          */
 188         if (rid == TPS65218_DCDC_3 && tps->rev == TPS65218_REV_2_1)
 189                 return 0;
 190
 191         if (!tps->info[rid]->strobe) {
 192                 if (rid == TPS65218_DCDC_3)
 193                         tps->info[rid]->strobe = 3;
 194                 else
 195                         return -EINVAL;
 196         }
 197
 198         return tps65218_set_bits(tps, dev->desc->bypass_reg,
 199                                  dev->desc->bypass_mask,
 200                                  tps->info[rid]->strobe,
 201                                  TPS65218_PROTECT_L1);
 202 }
 203
 204 /* Operations permitted on DCDC1, DCDC2 */
 205 static struct regulator_ops tps65218_dcdc12_ops = {
 206         .is_enabled             = regulator_is_enabled_regmap,
 207         .enable                 = tps65218_pmic_enable,
 208         .disable                = tps65218_pmic_disable,
 209         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 210         .set_voltage_sel        = tps65218_pmic_set_voltage_sel,
 211         .list_voltage           = regulator_list_voltage_linear_range,
 212         .map_voltage            = regulator_map_voltage_linear_range,
 213         .set_voltage_time_sel   = regulator_set_voltage_time_sel,
 214         .set_suspend_enable     = tps65218_pmic_set_suspend_enable,
 215         .set_suspend_disable    = tps65218_pmic_set_suspend_disable,
 216 };
 217
 218 /* Operations permitted on DCDC3, DCDC4 and LDO1 */
 219 static struct regulator_ops tps65218_ldo1_dcdc34_ops = {
 220         .is_enabled             = regulator_is_enabled_regmap,
 221         .enable                 = tps65218_pmic_enable,
 222         .disable                = tps65218_pmic_disable,
 223         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 224         .set_voltage_sel        = tps65218_pmic_set_voltage_sel,
 225         .list_voltage           = regulator_list_voltage_linear_range,
 226         .map_voltage            = regulator_map_voltage_linear_range,
 227         .set_suspend_enable     = tps65218_pmic_set_suspend_enable,
 228         .set_suspend_disable    = tps65218_pmic_set_suspend_disable,
 229 };
 230
 231 static const int ls3_currents[] = { 100, 200, 500, 1000 };
 232
 233 static int tps65218_pmic_set_input_current_lim(struct regulator_dev *dev,
 234                                                int lim_uA)
 235 {
 236         unsigned int index = 0;
 237         unsigned int num_currents = ARRAY_SIZE(ls3_currents);
 238         struct tps65218 *tps = rdev_get_drvdata(dev);
 239
 240         while (index < num_currents && ls3_currents[index] != lim_uA)
 241                 index++;
 242
 243         if (index == num_currents)
 244                 return -EINVAL;
 245
 246         return tps65218_set_bits(tps, dev->desc->csel_reg, dev->desc->csel_mask,
 247                                  index << 2, TPS65218_PROTECT_L1);
 248 }
 249
 250 static int tps65218_pmic_set_current_limit(struct regulator_dev *dev,
 251                                            int min_uA, int max_uA)
 252 {
 253         int index = 0;
 254         unsigned int num_currents = ARRAY_SIZE(ls3_currents);
 255         struct tps65218 *tps = rdev_get_drvdata(dev);
 256
 257         while (index < num_currents && ls3_currents[index] < max_uA)
 258                 index++;
 259
 260         index--;
 261
 262         if (index < 0 || ls3_currents[index] < min_uA)
 263                 return -EINVAL;
 264
 265         return tps65218_set_bits(tps, dev->desc->csel_reg, dev->desc->csel_mask,
 266                                  index << 2, TPS65218_PROTECT_L1);
 267 }
 268
 269 static int tps65218_pmic_get_current_limit(struct regulator_dev *dev)
 270 {
 271         int retval;
 272         unsigned int index;
 273         struct tps65218 *tps = rdev_get_drvdata(dev);
 274
 275         retval = tps65218_reg_read(tps, dev->desc->csel_reg, &index);
 276         if (retval < 0)
 277                 return retval;
 278
 279         index = (index & dev->desc->csel_mask) >> 2;
 280
 281         return ls3_currents[index];
 282 }
 283
 284 static struct regulator_ops tps65218_ls3_ops = {
 285         .is_enabled             = regulator_is_enabled_regmap,
 286         .enable                 = tps65218_pmic_enable,
 287         .disable                = tps65218_pmic_disable,
 288         .set_input_current_limit = tps65218_pmic_set_input_current_lim,
 289         .set_current_limit      = tps65218_pmic_set_current_limit,
 290         .get_current_limit      = tps65218_pmic_get_current_limit,
 291 };
 292
 293 /* Operations permitted on DCDC5, DCDC6 */
 294 static struct regulator_ops tps65218_dcdc56_pmic_ops = {
 295         .is_enabled             = regulator_is_enabled_regmap,
 296         .enable                 = tps65218_pmic_enable,
 297         .disable                = tps65218_pmic_disable,
 298         .set_suspend_enable     = tps65218_pmic_set_suspend_enable,
 299         .set_suspend_disable    = tps65218_pmic_set_suspend_disable,
 300 };
 301
 302 static const struct regulator_desc regulators[] = {
 303         TPS65218_REGULATOR("DCDC1", TPS65218_DCDC_1, REGULATOR_VOLTAGE,
 304                            tps65218_dcdc12_ops, 64, TPS65218_REG_CONTROL_DCDC1,
 305                            TPS65218_CONTROL_DCDC1_MASK, TPS65218_REG_ENABLE1,
 306                            TPS65218_ENABLE1_DC1_EN, 0, 0, dcdc1_dcdc2_ranges,
 307                            2, 4000, 0, TPS65218_REG_SEQ3,
 308                            TPS65218_SEQ3_DC1_SEQ_MASK),
 309         TPS65218_REGULATOR("DCDC2", TPS65218_DCDC_2, REGULATOR_VOLTAGE,
 310                            tps65218_dcdc12_ops, 64, TPS65218_REG_CONTROL_DCDC2,
 311                            TPS65218_CONTROL_DCDC2_MASK, TPS65218_REG_ENABLE1,
 312                            TPS65218_ENABLE1_DC2_EN, 0, 0, dcdc1_dcdc2_ranges,
 313                            2, 4000, 0, TPS65218_REG_SEQ3,
 314                            TPS65218_SEQ3_DC2_SEQ_MASK),
 315         TPS65218_REGULATOR("DCDC3", TPS65218_DCDC_3, REGULATOR_VOLTAGE,
 316                            tps65218_ldo1_dcdc34_ops, 64,
 317                            TPS65218_REG_CONTROL_DCDC3,
 318                            TPS65218_CONTROL_DCDC3_MASK, TPS65218_REG_ENABLE1,
 319                            TPS65218_ENABLE1_DC3_EN, 0, 0, ldo1_dcdc3_ranges, 2,
 320                            0, 0, TPS65218_REG_SEQ4, TPS65218_SEQ4_DC3_SEQ_MASK),
 321         TPS65218_REGULATOR("DCDC4", TPS65218_DCDC_4, REGULATOR_VOLTAGE,
 322                            tps65218_ldo1_dcdc34_ops, 53,
 323                            TPS65218_REG_CONTROL_DCDC4,
 324                            TPS65218_CONTROL_DCDC4_MASK, TPS65218_REG_ENABLE1,
 325                            TPS65218_ENABLE1_DC4_EN, 0, 0, dcdc4_ranges, 2,
 326                            0, 0, TPS65218_REG_SEQ4, TPS65218_SEQ4_DC4_SEQ_MASK),
 327         TPS65218_REGULATOR("DCDC5", TPS65218_DCDC_5, REGULATOR_VOLTAGE,
 328                            tps65218_dcdc56_pmic_ops, 1, -1, -1,
 329                            TPS65218_REG_ENABLE1, TPS65218_ENABLE1_DC5_EN, 0, 0,
 330                            NULL, 0, 0, 1000000, TPS65218_REG_SEQ5,
 331                            TPS65218_SEQ5_DC5_SEQ_MASK),
 332         TPS65218_REGULATOR("DCDC6", TPS65218_DCDC_6, REGULATOR_VOLTAGE,
 333                            tps65218_dcdc56_pmic_ops, 1, -1, -1,
 334                            TPS65218_REG_ENABLE1, TPS65218_ENABLE1_DC6_EN, 0, 0,
 335                            NULL, 0, 0, 1800000, TPS65218_REG_SEQ5,
 336                            TPS65218_SEQ5_DC6_SEQ_MASK),
 337         TPS65218_REGULATOR("LDO1", TPS65218_LDO_1, REGULATOR_VOLTAGE,
 338                            tps65218_ldo1_dcdc34_ops, 64,
 339                            TPS65218_REG_CONTROL_LDO1,
 340                            TPS65218_CONTROL_LDO1_MASK, TPS65218_REG_ENABLE2,
 341                            TPS65218_ENABLE2_LDO1_EN, 0, 0, ldo1_dcdc3_ranges,
 342                            2, 0, 0, TPS65218_REG_SEQ6,
 343                            TPS65218_SEQ6_LDO1_SEQ_MASK),
 344         TPS65218_REGULATOR("LS3", TPS65218_LS_3, REGULATOR_CURRENT,
 345                            tps65218_ls3_ops, 0, 0, 0, TPS65218_REG_ENABLE2,
 346                            TPS65218_ENABLE2_LS3_EN, TPS65218_REG_CONFIG2,
 347                            TPS65218_CONFIG2_LS3ILIM_MASK, NULL, 0, 0, 0, 0, 0),
 348 };
 349
 350 static int tps65218_regulator_probe(struct platform_device *pdev)
 351 {
 352         struct tps65218 *tps = dev_get_drvdata(pdev->dev.parent);
 353         struct regulator_init_data *init_data;
 354         const struct tps_info   *template;
 355         struct regulator_dev *rdev;
 356         const struct of_device_id       *match;
 357         struct regulator_config config = { };
 358         int id, ret;
 359         unsigned int val;
 360
 361         match = of_match_device(tps65218_of_match, &pdev->dev);
 362         if (!match)
 363                 return -ENODEV;
 364
 365         template = match->data;
 366         id = template->id;
 367         init_data = of_get_regulator_init_data(&pdev->dev, pdev->dev.of_node,
 368                                                &regulators[id]);
 369
 370         platform_set_drvdata(pdev, tps);
 371
 372         tps->info[id] = &tps65218_pmic_regs[id];
 373         config.dev = &pdev->dev;
 374         config.init_data = init_data;
 375         config.driver_data = tps;
 376         config.regmap = tps->regmap;
 377         config.of_node = pdev->dev.of_node;
 378
 379         rdev = devm_regulator_register(&pdev->dev, &regulators[id], &config);
 380         if (IS_ERR(rdev)) {
 381                 dev_err(tps->dev, "failed to register %s regulator\n",
 382                         pdev->name);
 383                 return PTR_ERR(rdev);
 384         }
 385
 386         ret = tps65218_reg_read(tps, regulators[id].bypass_reg, &val);
 387         if (ret)
 388                 return ret;
 389
 390         tps->info[id]->strobe = val & regulators[id].bypass_mask;
 391
 392         return 0;
 393 }
 394
 395 static struct platform_driver tps65218_regulator_driver = {
 396         .driver = {
 397                 .name = "tps65218-pmic",
 398                 .of_match_table = tps65218_of_match,
 399         },
 400         .probe = tps65218_regulator_probe,
 401 };
 402
 403 module_platform_driver(tps65218_regulator_driver);
 404
 405 MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>");
 406 MODULE_DESCRIPTION("TPS65218 voltage regulator driver");
 407 MODULE_ALIAS("platform:tps65218-pmic");
 408 MODULE_LICENSE("GPL v2");