drivers/regulator/tps6507x-regulator.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * tps6507x-regulator.c
   4  *
   5  * Regulator driver for TPS65073 PMIC
   6  *
   7  * Copyright (C) 2009 Texas Instrument Incorporated - https://www.ti.com/
   8  */
   9
  10 #include <linux/kernel.h>
  11 #include <linux/module.h>
  12 #include <linux/init.h>
  13 #include <linux/err.h>
  14 #include <linux/platform_device.h>
  15 #include <linux/regulator/driver.h>
  16 #include <linux/regulator/machine.h>
  17 #include <linux/regulator/tps6507x.h>
  18 #include <linux/of.h>
  19 #include <linux/slab.h>
  20 #include <linux/mfd/tps6507x.h>
  21 #include <linux/regulator/of_regulator.h>
  22
  23 /* DCDC's */
  24 #define TPS6507X_DCDC_1                         0
  25 #define TPS6507X_DCDC_2                         1
  26 #define TPS6507X_DCDC_3                         2
  27 /* LDOs */
  28 #define TPS6507X_LDO_1                          3
  29 #define TPS6507X_LDO_2                          4
  30
  31 #define TPS6507X_MAX_REG_ID                     TPS6507X_LDO_2
  32
  33 /* Number of step-down converters available */
  34 #define TPS6507X_NUM_DCDC                       3
  35 /* Number of LDO voltage regulators  available */
  36 #define TPS6507X_NUM_LDO                        2
  37 /* Number of total regulators available */
  38 #define TPS6507X_NUM_REGULATOR          (TPS6507X_NUM_DCDC + TPS6507X_NUM_LDO)
  39
  40 /* Supported voltage values for regulators (in microVolts) */
  41 static const unsigned int VDCDCx_VSEL_table[] = {
  42         725000, 750000, 775000, 800000,
  43         825000, 850000, 875000, 900000,
  44         925000, 950000, 975000, 1000000,
  45         1025000, 1050000, 1075000, 1100000,
  46         1125000, 1150000, 1175000, 1200000,
  47         1225000, 1250000, 1275000, 1300000,
  48         1325000, 1350000, 1375000, 1400000,
  49         1425000, 1450000, 1475000, 1500000,
  50         1550000, 1600000, 1650000, 1700000,
  51         1750000, 1800000, 1850000, 1900000,
  52         1950000, 2000000, 2050000, 2100000,
  53         2150000, 2200000, 2250000, 2300000,
  54         2350000, 2400000, 2450000, 2500000,
  55         2550000, 2600000, 2650000, 2700000,
  56         2750000, 2800000, 2850000, 2900000,
  57         3000000, 3100000, 3200000, 3300000,
  58 };
  59
  60 static const unsigned int LDO1_VSEL_table[] = {
  61         1000000, 1100000, 1200000, 1250000,
  62         1300000, 1350000, 1400000, 1500000,
  63         1600000, 1800000, 2500000, 2750000,
  64         2800000, 3000000, 3100000, 3300000,
  65 };
  66
  67 /* The voltage mapping table for LDO2 is the same as VDCDCx */
  68 #define LDO2_VSEL_table VDCDCx_VSEL_table
  69
  70 struct tps_info {
  71         const char *name;
  72         u8 table_len;
  73         const unsigned int *table;
  74
  75         /* Does DCDC high or the low register defines output voltage? */
  76         bool defdcdc_default;
  77 };
  78
  79 static struct tps_info tps6507x_pmic_regs[] = {
  80         {
  81                 .name = "VDCDC1",
  82                 .table_len = ARRAY_SIZE(VDCDCx_VSEL_table),
  83                 .table = VDCDCx_VSEL_table,
  84         },
  85         {
  86                 .name = "VDCDC2",
  87                 .table_len = ARRAY_SIZE(VDCDCx_VSEL_table),
  88                 .table = VDCDCx_VSEL_table,
  89         },
  90         {
  91                 .name = "VDCDC3",
  92                 .table_len = ARRAY_SIZE(VDCDCx_VSEL_table),
  93                 .table = VDCDCx_VSEL_table,
  94         },
  95         {
  96                 .name = "LDO1",
  97                 .table_len = ARRAY_SIZE(LDO1_VSEL_table),
  98                 .table = LDO1_VSEL_table,
  99         },
 100         {
 101                 .name = "LDO2",
 102                 .table_len = ARRAY_SIZE(LDO2_VSEL_table),
 103                 .table = LDO2_VSEL_table,
 104         },
 105 };
 106
 107 struct tps6507x_pmic {
 108         struct regulator_desc desc[TPS6507X_NUM_REGULATOR];
 109         struct tps6507x_dev *mfd;
 110         struct tps_info *info[TPS6507X_NUM_REGULATOR];
 111         struct mutex io_lock;
 112 };
 113 static inline int tps6507x_pmic_read(struct tps6507x_pmic *tps, u8 reg)
 114 {
 115         u8 val;
 116         int err;
 117
 118         err = tps->mfd->read_dev(tps->mfd, reg, 1, &val);
 119
 120         if (err)
 121                 return err;
 122
 123         return val;
 124 }
 125
 126 static inline int tps6507x_pmic_write(struct tps6507x_pmic *tps, u8 reg, u8 val)
 127 {
 128         return tps->mfd->write_dev(tps->mfd, reg, 1, &val);
 129 }
 130
 131 static int tps6507x_pmic_set_bits(struct tps6507x_pmic *tps, u8 reg, u8 mask)
 132 {
 133         int err, data;
 134
 135         mutex_lock(&tps->io_lock);
 136
 137         data = tps6507x_pmic_read(tps, reg);
 138         if (data < 0) {
 139                 dev_err(tps->mfd->dev, "Read from reg 0x%x failed\n", reg);
 140                 err = data;
 141                 goto out;
 142         }
 143
 144         data |= mask;
 145         err = tps6507x_pmic_write(tps, reg, data);
 146         if (err)
 147                 dev_err(tps->mfd->dev, "Write for reg 0x%x failed\n", reg);
 148
 149 out:
 150         mutex_unlock(&tps->io_lock);
 151         return err;
 152 }
 153
 154 static int tps6507x_pmic_clear_bits(struct tps6507x_pmic *tps, u8 reg, u8 mask)
 155 {
 156         int err, data;
 157
 158         mutex_lock(&tps->io_lock);
 159
 160         data = tps6507x_pmic_read(tps, reg);
 161         if (data < 0) {
 162                 dev_err(tps->mfd->dev, "Read from reg 0x%x failed\n", reg);
 163                 err = data;
 164                 goto out;
 165         }
 166
 167         data &= ~mask;
 168         err = tps6507x_pmic_write(tps, reg, data);
 169         if (err)
 170                 dev_err(tps->mfd->dev, "Write for reg 0x%x failed\n", reg);
 171
 172 out:
 173         mutex_unlock(&tps->io_lock);
 174         return err;
 175 }
 176
 177 static int tps6507x_pmic_reg_read(struct tps6507x_pmic *tps, u8 reg)
 178 {
 179         int data;
 180
 181         mutex_lock(&tps->io_lock);
 182
 183         data = tps6507x_pmic_read(tps, reg);
 184         if (data < 0)
 185                 dev_err(tps->mfd->dev, "Read from reg 0x%x failed\n", reg);
 186
 187         mutex_unlock(&tps->io_lock);
 188         return data;
 189 }
 190
 191 static int tps6507x_pmic_reg_write(struct tps6507x_pmic *tps, u8 reg, u8 val)
 192 {
 193         int err;
 194
 195         mutex_lock(&tps->io_lock);
 196
 197         err = tps6507x_pmic_write(tps, reg, val);
 198         if (err < 0)
 199                 dev_err(tps->mfd->dev, "Write for reg 0x%x failed\n", reg);
 200
 201         mutex_unlock(&tps->io_lock);
 202         return err;
 203 }
 204
 205 static int tps6507x_pmic_is_enabled(struct regulator_dev *dev)
 206 {
 207         struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
 208         int data, rid = rdev_get_id(dev);
 209         u8 shift;
 210
 211         if (rid < TPS6507X_DCDC_1 || rid > TPS6507X_LDO_2)
 212                 return -EINVAL;
 213
 214         shift = TPS6507X_MAX_REG_ID - rid;
 215         data = tps6507x_pmic_reg_read(tps, TPS6507X_REG_CON_CTRL1);
 216
 217         if (data < 0)
 218                 return data;
 219         else
 220                 return (data & 1<<shift) ? 1 : 0;
 221 }
 222
 223 static int tps6507x_pmic_enable(struct regulator_dev *dev)
 224 {
 225         struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
 226         int rid = rdev_get_id(dev);
 227         u8 shift;
 228
 229         if (rid < TPS6507X_DCDC_1 || rid > TPS6507X_LDO_2)
 230                 return -EINVAL;
 231
 232         shift = TPS6507X_MAX_REG_ID - rid;
 233         return tps6507x_pmic_set_bits(tps, TPS6507X_REG_CON_CTRL1, 1 << shift);
 234 }
 235
 236 static int tps6507x_pmic_disable(struct regulator_dev *dev)
 237 {
 238         struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
 239         int rid = rdev_get_id(dev);
 240         u8 shift;
 241
 242         if (rid < TPS6507X_DCDC_1 || rid > TPS6507X_LDO_2)
 243                 return -EINVAL;
 244
 245         shift = TPS6507X_MAX_REG_ID - rid;
 246         return tps6507x_pmic_clear_bits(tps, TPS6507X_REG_CON_CTRL1,
 247                                         1 << shift);
 248 }
 249
 250 static int tps6507x_pmic_get_voltage_sel(struct regulator_dev *dev)
 251 {
 252         struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
 253         int data, rid = rdev_get_id(dev);
 254         u8 reg, mask;
 255
 256         switch (rid) {
 257         case TPS6507X_DCDC_1:
 258                 reg = TPS6507X_REG_DEFDCDC1;
 259                 mask = TPS6507X_DEFDCDCX_DCDC_MASK;
 260                 break;
 261         case TPS6507X_DCDC_2:
 262                 if (tps->info[rid]->defdcdc_default)
 263                         reg = TPS6507X_REG_DEFDCDC2_HIGH;
 264                 else
 265                         reg = TPS6507X_REG_DEFDCDC2_LOW;
 266                 mask = TPS6507X_DEFDCDCX_DCDC_MASK;
 267                 break;
 268         case TPS6507X_DCDC_3:
 269                 if (tps->info[rid]->defdcdc_default)
 270                         reg = TPS6507X_REG_DEFDCDC3_HIGH;
 271                 else
 272                         reg = TPS6507X_REG_DEFDCDC3_LOW;
 273                 mask = TPS6507X_DEFDCDCX_DCDC_MASK;
 274                 break;
 275         case TPS6507X_LDO_1:
 276                 reg = TPS6507X_REG_LDO_CTRL1;
 277                 mask = TPS6507X_REG_LDO_CTRL1_LDO1_MASK;
 278                 break;
 279         case TPS6507X_LDO_2:
 280                 reg = TPS6507X_REG_DEFLDO2;
 281                 mask = TPS6507X_REG_DEFLDO2_LDO2_MASK;
 282                 break;
 283         default:
 284                 return -EINVAL;
 285         }
 286
 287         data = tps6507x_pmic_reg_read(tps, reg);
 288         if (data < 0)
 289                 return data;
 290
 291         data &= mask;
 292         return data;
 293 }
 294
 295 static int tps6507x_pmic_set_voltage_sel(struct regulator_dev *dev,
 296                                           unsigned selector)
 297 {
 298         struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
 299         int data, rid = rdev_get_id(dev);
 300         u8 reg, mask;
 301
 302         switch (rid) {
 303         case TPS6507X_DCDC_1:
 304                 reg = TPS6507X_REG_DEFDCDC1;
 305                 mask = TPS6507X_DEFDCDCX_DCDC_MASK;
 306                 break;
 307         case TPS6507X_DCDC_2:
 308                 if (tps->info[rid]->defdcdc_default)
 309                         reg = TPS6507X_REG_DEFDCDC2_HIGH;
 310                 else
 311                         reg = TPS6507X_REG_DEFDCDC2_LOW;
 312                 mask = TPS6507X_DEFDCDCX_DCDC_MASK;
 313                 break;
 314         case TPS6507X_DCDC_3:
 315                 if (tps->info[rid]->defdcdc_default)
 316                         reg = TPS6507X_REG_DEFDCDC3_HIGH;
 317                 else
 318                         reg = TPS6507X_REG_DEFDCDC3_LOW;
 319                 mask = TPS6507X_DEFDCDCX_DCDC_MASK;
 320                 break;
 321         case TPS6507X_LDO_1:
 322                 reg = TPS6507X_REG_LDO_CTRL1;
 323                 mask = TPS6507X_REG_LDO_CTRL1_LDO1_MASK;
 324                 break;
 325         case TPS6507X_LDO_2:
 326                 reg = TPS6507X_REG_DEFLDO2;
 327                 mask = TPS6507X_REG_DEFLDO2_LDO2_MASK;
 328                 break;
 329         default:
 330                 return -EINVAL;
 331         }
 332
 333         data = tps6507x_pmic_reg_read(tps, reg);
 334         if (data < 0)
 335                 return data;
 336
 337         data &= ~mask;
 338         data |= selector;
 339
 340         return tps6507x_pmic_reg_write(tps, reg, data);
 341 }
 342
 343 static const struct regulator_ops tps6507x_pmic_ops = {
 344         .is_enabled = tps6507x_pmic_is_enabled,
 345         .enable = tps6507x_pmic_enable,
 346         .disable = tps6507x_pmic_disable,
 347         .get_voltage_sel = tps6507x_pmic_get_voltage_sel,
 348         .set_voltage_sel = tps6507x_pmic_set_voltage_sel,
 349         .list_voltage = regulator_list_voltage_table,
 350         .map_voltage = regulator_map_voltage_ascend,
 351 };
 352
 353 static int tps6507x_pmic_of_parse_cb(struct device_node *np,
 354                                      const struct regulator_desc *desc,
 355                                      struct regulator_config *config)
 356 {
 357         struct tps6507x_pmic *tps = config->driver_data;
 358         struct tps_info *info = tps->info[desc->id];
 359         u32 prop;
 360         int ret;
 361
 362         ret = of_property_read_u32(np, "ti,defdcdc_default", &prop);
 363         if (!ret)
 364                 info->defdcdc_default = prop;
 365
 366         return 0;
 367 }
 368
 369 static int tps6507x_pmic_probe(struct platform_device *pdev)
 370 {
 371         struct tps6507x_dev *tps6507x_dev = dev_get_drvdata(pdev->dev.parent);
 372         struct tps_info *info = &tps6507x_pmic_regs[0];
 373         struct regulator_config config = { };
 374         struct regulator_init_data *init_data = NULL;
 375         struct regulator_dev *rdev;
 376         struct tps6507x_pmic *tps;
 377         struct tps6507x_board *tps_board;
 378         int i;
 379
 380         /**
 381          * tps_board points to pmic related constants
 382          * coming from the board-evm file.
 383          */
 384
 385         tps_board = dev_get_platdata(tps6507x_dev->dev);
 386         if (tps_board)
 387                 init_data = tps_board->tps6507x_pmic_init_data;
 388
 389         tps = devm_kzalloc(&pdev->dev, sizeof(*tps), GFP_KERNEL);
 390         if (!tps)
 391                 return -ENOMEM;
 392
 393         mutex_init(&tps->io_lock);
 394
 395         /* common for all regulators */
 396         tps->mfd = tps6507x_dev;
 397
 398         for (i = 0; i < TPS6507X_NUM_REGULATOR; i++, info++) {
 399                 /* Register the regulators */
 400                 tps->info[i] = info;
 401                 if (init_data && init_data[i].driver_data) {
 402                         struct tps6507x_reg_platform_data *data =
 403                                         init_data[i].driver_data;
 404                         info->defdcdc_default = data->defdcdc_default;
 405                 }
 406
 407                 tps->desc[i].name = info->name;
 408                 tps->desc[i].of_match = of_match_ptr(info->name);
 409                 tps->desc[i].regulators_node = of_match_ptr("regulators");
 410                 tps->desc[i].of_parse_cb = tps6507x_pmic_of_parse_cb;
 411                 tps->desc[i].id = i;
 412                 tps->desc[i].n_voltages = info->table_len;
 413                 tps->desc[i].volt_table = info->table;
 414                 tps->desc[i].ops = &tps6507x_pmic_ops;
 415                 tps->desc[i].type = REGULATOR_VOLTAGE;
 416                 tps->desc[i].owner = THIS_MODULE;
 417
 418                 config.dev = tps6507x_dev->dev;
 419                 config.init_data = init_data;
 420                 config.driver_data = tps;
 421
 422                 rdev = devm_regulator_register(&pdev->dev, &tps->desc[i],
 423                                                &config);
 424                 if (IS_ERR(rdev)) {
 425                         dev_err(tps6507x_dev->dev,
 426                                 "failed to register %s regulator\n",
 427                                 pdev->name);
 428                         return PTR_ERR(rdev);
 429                 }
 430         }
 431
 432         tps6507x_dev->pmic = tps;
 433         platform_set_drvdata(pdev, tps6507x_dev);
 434
 435         return 0;
 436 }
 437
 438 static struct platform_driver tps6507x_pmic_driver = {
 439         .driver = {
 440                 .name = "tps6507x-pmic",
 441                 .probe_type = PROBE_PREFER_ASYNCHRONOUS,
 442         },
 443         .probe = tps6507x_pmic_probe,
 444 };
 445
 446 static int __init tps6507x_pmic_init(void)
 447 {
 448         return platform_driver_register(&tps6507x_pmic_driver);
 449 }
 450 subsys_initcall(tps6507x_pmic_init);
 451
 452 static void __exit tps6507x_pmic_cleanup(void)
 453 {
 454         platform_driver_unregister(&tps6507x_pmic_driver);
 455 }
 456 module_exit(tps6507x_pmic_cleanup);
 457
 458 MODULE_AUTHOR("Texas Instruments");
 459 MODULE_DESCRIPTION("TPS6507x voltage regulator driver");
 460 MODULE_LICENSE("GPL v2");
 461 MODULE_ALIAS("platform:tps6507x-pmic");