drivers/regulator/tps65023-regulator.c

   1 /*
   2  * tps65023-regulator.c
   3  *
   4  * Supports TPS65023 Regulator
   5  *
   6  * Copyright (C) 2009 Texas Instrument 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 as
  10  * published by the Free Software Foundation version 2.
  11  *
  12  * This program is distributed "as is" WITHOUT ANY WARRANTY of any kind,
  13  * whether express or implied; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License for more details.
  16  */
  17
  18 #include <linux/kernel.h>
  19 #include <linux/module.h>
  20 #include <linux/init.h>
  21 #include <linux/err.h>
  22 #include <linux/platform_device.h>
  23 #include <linux/regulator/driver.h>
  24 #include <linux/regulator/machine.h>
  25 #include <linux/i2c.h>
  26 #include <linux/slab.h>
  27 #include <linux/regmap.h>
  28
  29 /* Register definitions */
  30 #define TPS65023_REG_VERSION            0
  31 #define TPS65023_REG_PGOODZ             1
  32 #define TPS65023_REG_MASK               2
  33 #define TPS65023_REG_REG_CTRL           3
  34 #define TPS65023_REG_CON_CTRL           4
  35 #define TPS65023_REG_CON_CTRL2          5
  36 #define TPS65023_REG_DEF_CORE           6
  37 #define TPS65023_REG_DEFSLEW            7
  38 #define TPS65023_REG_LDO_CTRL           8
  39
  40 /* PGOODZ bitfields */
  41 #define TPS65023_PGOODZ_PWRFAILZ        BIT(7)
  42 #define TPS65023_PGOODZ_LOWBATTZ        BIT(6)
  43 #define TPS65023_PGOODZ_VDCDC1          BIT(5)
  44 #define TPS65023_PGOODZ_VDCDC2          BIT(4)
  45 #define TPS65023_PGOODZ_VDCDC3          BIT(3)
  46 #define TPS65023_PGOODZ_LDO2            BIT(2)
  47 #define TPS65023_PGOODZ_LDO1            BIT(1)
  48
  49 /* MASK bitfields */
  50 #define TPS65023_MASK_PWRFAILZ          BIT(7)
  51 #define TPS65023_MASK_LOWBATTZ          BIT(6)
  52 #define TPS65023_MASK_VDCDC1            BIT(5)
  53 #define TPS65023_MASK_VDCDC2            BIT(4)
  54 #define TPS65023_MASK_VDCDC3            BIT(3)
  55 #define TPS65023_MASK_LDO2              BIT(2)
  56 #define TPS65023_MASK_LDO1              BIT(1)
  57
  58 /* REG_CTRL bitfields */
  59 #define TPS65023_REG_CTRL_VDCDC1_EN     BIT(5)
  60 #define TPS65023_REG_CTRL_VDCDC2_EN     BIT(4)
  61 #define TPS65023_REG_CTRL_VDCDC3_EN     BIT(3)
  62 #define TPS65023_REG_CTRL_LDO2_EN       BIT(2)
  63 #define TPS65023_REG_CTRL_LDO1_EN       BIT(1)
  64
  65 /* REG_CTRL2 bitfields */
  66 #define TPS65023_REG_CTRL2_GO           BIT(7)
  67 #define TPS65023_REG_CTRL2_CORE_ADJ     BIT(6)
  68 #define TPS65023_REG_CTRL2_DCDC2        BIT(2)
  69 #define TPS65023_REG_CTRL2_DCDC1        BIT(1)
  70 #define TPS65023_REG_CTRL2_DCDC3        BIT(0)
  71
  72 /* Number of step-down converters available */
  73 #define TPS65023_NUM_DCDC               3
  74 /* Number of LDO voltage regulators  available */
  75 #define TPS65023_NUM_LDO                2
  76 /* Number of total regulators available */
  77 #define TPS65023_NUM_REGULATOR  (TPS65023_NUM_DCDC + TPS65023_NUM_LDO)
  78
  79 /* DCDCs */
  80 #define TPS65023_DCDC_1                 0
  81 #define TPS65023_DCDC_2                 1
  82 #define TPS65023_DCDC_3                 2
  83 /* LDOs */
  84 #define TPS65023_LDO_1                  3
  85 #define TPS65023_LDO_2                  4
  86
  87 #define TPS65023_MAX_REG_ID             TPS65023_LDO_2
  88
  89 /* Supported voltage values for regulators */
  90 static const unsigned int VCORE_VSEL_table[] = {
  91         800000, 825000, 850000, 875000,
  92         900000, 925000, 950000, 975000,
  93         1000000, 1025000, 1050000, 1075000,
  94         1100000, 1125000, 1150000, 1175000,
  95         1200000, 1225000, 1250000, 1275000,
  96         1300000, 1325000, 1350000, 1375000,
  97         1400000, 1425000, 1450000, 1475000,
  98         1500000, 1525000, 1550000, 1600000,
  99 };
 100
 101 static const unsigned int DCDC_FIXED_3300000_VSEL_table[] = {
 102         3300000,
 103 };
 104
 105 static const unsigned int DCDC_FIXED_1800000_VSEL_table[] = {
 106         1800000,
 107 };
 108
 109 /* Supported voltage values for LDO regulators for tps65020 */
 110 static const unsigned int TPS65020_LDO_VSEL_table[] = {
 111         1000000, 1050000, 1100000, 1300000,
 112         1800000, 2500000, 3000000, 3300000,
 113 };
 114
 115 /* Supported voltage values for LDO regulators
 116  * for tps65021 and tps65023 */
 117 static const unsigned int TPS65023_LDO1_VSEL_table[] = {
 118         1000000, 1100000, 1300000, 1800000,
 119         2200000, 2600000, 2800000, 3150000,
 120 };
 121
 122 static const unsigned int TPS65023_LDO2_VSEL_table[] = {
 123         1050000, 1200000, 1300000, 1800000,
 124         2500000, 2800000, 3000000, 3300000,
 125 };
 126
 127 /* Regulator specific details */
 128 struct tps_info {
 129         const char *name;
 130         u8 table_len;
 131         const unsigned int *table;
 132 };
 133
 134 /* PMIC details */
 135 struct tps_pmic {
 136         struct regulator_desc desc[TPS65023_NUM_REGULATOR];
 137         struct regulator_dev *rdev[TPS65023_NUM_REGULATOR];
 138         const struct tps_info *info[TPS65023_NUM_REGULATOR];
 139         struct regmap *regmap;
 140         u8 core_regulator;
 141 };
 142
 143 /* Struct passed as driver data */
 144 struct tps_driver_data {
 145         const struct tps_info *info;
 146         u8 core_regulator;
 147 };
 148
 149 static int tps65023_dcdc_get_voltage_sel(struct regulator_dev *dev)
 150 {
 151         struct tps_pmic *tps = rdev_get_drvdata(dev);
 152         int dcdc = rdev_get_id(dev);
 153
 154         if (dcdc < TPS65023_DCDC_1 || dcdc > TPS65023_DCDC_3)
 155                 return -EINVAL;
 156
 157         if (dcdc != tps->core_regulator)
 158                 return 0;
 159
 160         return regulator_get_voltage_sel_regmap(dev);
 161 }
 162
 163 static int tps65023_dcdc_set_voltage_sel(struct regulator_dev *dev,
 164                                          unsigned selector)
 165 {
 166         struct tps_pmic *tps = rdev_get_drvdata(dev);
 167         int dcdc = rdev_get_id(dev);
 168
 169         if (dcdc != tps->core_regulator)
 170                 return -EINVAL;
 171
 172         return regulator_set_voltage_sel_regmap(dev, selector);
 173 }
 174
 175 /* Operations permitted on VDCDCx */
 176 static struct regulator_ops tps65023_dcdc_ops = {
 177         .is_enabled = regulator_is_enabled_regmap,
 178         .enable = regulator_enable_regmap,
 179         .disable = regulator_disable_regmap,
 180         .get_voltage_sel = tps65023_dcdc_get_voltage_sel,
 181         .set_voltage_sel = tps65023_dcdc_set_voltage_sel,
 182         .list_voltage = regulator_list_voltage_table,
 183         .map_voltage = regulator_map_voltage_ascend,
 184 };
 185
 186 /* Operations permitted on LDOx */
 187 static struct regulator_ops tps65023_ldo_ops = {
 188         .is_enabled = regulator_is_enabled_regmap,
 189         .enable = regulator_enable_regmap,
 190         .disable = regulator_disable_regmap,
 191         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 192         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 193         .list_voltage = regulator_list_voltage_table,
 194         .map_voltage = regulator_map_voltage_ascend,
 195 };
 196
 197 static struct regmap_config tps65023_regmap_config = {
 198         .reg_bits = 8,
 199         .val_bits = 8,
 200 };
 201
 202 static int tps_65023_probe(struct i2c_client *client,
 203                                      const struct i2c_device_id *id)
 204 {
 205         const struct tps_driver_data *drv_data = (void *)id->driver_data;
 206         const struct tps_info *info = drv_data->info;
 207         struct regulator_config config = { };
 208         struct regulator_init_data *init_data;
 209         struct regulator_dev *rdev;
 210         struct tps_pmic *tps;
 211         int i;
 212         int error;
 213
 214         if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 215                 return -EIO;
 216
 217         /**
 218          * init_data points to array of regulator_init structures
 219          * coming from the board-evm file.
 220          */
 221         init_data = client->dev.platform_data;
 222         if (!init_data)
 223                 return -EIO;
 224
 225         tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL);
 226         if (!tps)
 227                 return -ENOMEM;
 228
 229         tps->regmap = devm_regmap_init_i2c(client, &tps65023_regmap_config);
 230         if (IS_ERR(tps->regmap)) {
 231                 error = PTR_ERR(tps->regmap);
 232                 dev_err(&client->dev, "Failed to allocate register map: %d\n",
 233                         error);
 234                 return error;
 235         }
 236
 237         /* common for all regulators */
 238         tps->core_regulator = drv_data->core_regulator;
 239
 240         for (i = 0; i < TPS65023_NUM_REGULATOR; i++, info++, init_data++) {
 241                 /* Store regulator specific information */
 242                 tps->info[i] = info;
 243
 244                 tps->desc[i].name = info->name;
 245                 tps->desc[i].id = i;
 246                 tps->desc[i].n_voltages = info->table_len;
 247                 tps->desc[i].volt_table = info->table;
 248                 tps->desc[i].ops = (i > TPS65023_DCDC_3 ?
 249                                         &tps65023_ldo_ops : &tps65023_dcdc_ops);
 250                 tps->desc[i].type = REGULATOR_VOLTAGE;
 251                 tps->desc[i].owner = THIS_MODULE;
 252
 253                 tps->desc[i].enable_reg = TPS65023_REG_REG_CTRL;
 254                 switch (i) {
 255                 case TPS65023_LDO_1:
 256                         tps->desc[i].vsel_reg = TPS65023_REG_LDO_CTRL;
 257                         tps->desc[i].vsel_mask = 0x07;
 258                         tps->desc[i].enable_mask = 1 << 1;
 259                         break;
 260                 case TPS65023_LDO_2:
 261                         tps->desc[i].vsel_reg = TPS65023_REG_LDO_CTRL;
 262                         tps->desc[i].vsel_mask = 0x70;
 263                         tps->desc[i].enable_mask = 1 << 2;
 264                         break;
 265                 default: /* DCDCx */
 266                         tps->desc[i].enable_mask =
 267                                         1 << (TPS65023_NUM_REGULATOR - i);
 268                         tps->desc[i].vsel_reg = TPS65023_REG_DEF_CORE;
 269                         tps->desc[i].vsel_mask = info->table_len - 1;
 270                         tps->desc[i].apply_reg = TPS65023_REG_CON_CTRL2;
 271                         tps->desc[i].apply_bit = TPS65023_REG_CTRL2_GO;
 272                 }
 273
 274                 config.dev = &client->dev;
 275                 config.init_data = init_data;
 276                 config.driver_data = tps;
 277                 config.regmap = tps->regmap;
 278
 279                 /* Register the regulators */
 280                 rdev = regulator_register(&tps->desc[i], &config);
 281                 if (IS_ERR(rdev)) {
 282                         dev_err(&client->dev, "failed to register %s\n",
 283                                 id->name);
 284                         error = PTR_ERR(rdev);
 285                         goto fail;
 286                 }
 287
 288                 /* Save regulator for cleanup */
 289                 tps->rdev[i] = rdev;
 290         }
 291
 292         i2c_set_clientdata(client, tps);
 293
 294         /* Enable setting output voltage by I2C */
 295         regmap_update_bits(tps->regmap, TPS65023_REG_CON_CTRL2,
 296                         TPS65023_REG_CTRL2_CORE_ADJ, TPS65023_REG_CTRL2_CORE_ADJ);
 297
 298         return 0;
 299
 300  fail:
 301         while (--i >= 0)
 302                 regulator_unregister(tps->rdev[i]);
 303         return error;
 304 }
 305
 306 static int tps_65023_remove(struct i2c_client *client)
 307 {
 308         struct tps_pmic *tps = i2c_get_clientdata(client);
 309         int i;
 310
 311         for (i = 0; i < TPS65023_NUM_REGULATOR; i++)
 312                 regulator_unregister(tps->rdev[i]);
 313         return 0;
 314 }
 315
 316 static const struct tps_info tps65020_regs[] = {
 317         {
 318                 .name = "VDCDC1",
 319                 .table_len = ARRAY_SIZE(DCDC_FIXED_3300000_VSEL_table),
 320                 .table = DCDC_FIXED_3300000_VSEL_table,
 321         },
 322         {
 323                 .name = "VDCDC2",
 324                 .table_len = ARRAY_SIZE(DCDC_FIXED_1800000_VSEL_table),
 325                 .table = DCDC_FIXED_1800000_VSEL_table,
 326         },
 327         {
 328                 .name = "VDCDC3",
 329                 .table_len = ARRAY_SIZE(VCORE_VSEL_table),
 330                 .table = VCORE_VSEL_table,
 331         },
 332         {
 333                 .name = "LDO1",
 334                 .table_len = ARRAY_SIZE(TPS65020_LDO_VSEL_table),
 335                 .table = TPS65020_LDO_VSEL_table,
 336         },
 337         {
 338                 .name = "LDO2",
 339                 .table_len = ARRAY_SIZE(TPS65020_LDO_VSEL_table),
 340                 .table = TPS65020_LDO_VSEL_table,
 341         },
 342 };
 343
 344 static const struct tps_info tps65021_regs[] = {
 345         {
 346                 .name = "VDCDC1",
 347                 .table_len = ARRAY_SIZE(DCDC_FIXED_3300000_VSEL_table),
 348                 .table = DCDC_FIXED_3300000_VSEL_table,
 349         },
 350         {
 351                 .name = "VDCDC2",
 352                 .table_len = ARRAY_SIZE(DCDC_FIXED_1800000_VSEL_table),
 353                 .table = DCDC_FIXED_1800000_VSEL_table,
 354         },
 355         {
 356                 .name = "VDCDC3",
 357                 .table_len = ARRAY_SIZE(VCORE_VSEL_table),
 358                 .table = VCORE_VSEL_table,
 359         },
 360         {
 361                 .name = "LDO1",
 362                 .table_len = ARRAY_SIZE(TPS65023_LDO1_VSEL_table),
 363                 .table = TPS65023_LDO1_VSEL_table,
 364         },
 365         {
 366                 .name = "LDO2",
 367                 .table_len = ARRAY_SIZE(TPS65023_LDO2_VSEL_table),
 368                 .table = TPS65023_LDO2_VSEL_table,
 369         },
 370 };
 371
 372 static const struct tps_info tps65023_regs[] = {
 373         {
 374                 .name = "VDCDC1",
 375                 .table_len = ARRAY_SIZE(VCORE_VSEL_table),
 376                 .table = VCORE_VSEL_table,
 377         },
 378         {
 379                 .name = "VDCDC2",
 380                 .table_len = ARRAY_SIZE(DCDC_FIXED_3300000_VSEL_table),
 381                 .table = DCDC_FIXED_3300000_VSEL_table,
 382         },
 383         {
 384                 .name = "VDCDC3",
 385                 .table_len = ARRAY_SIZE(DCDC_FIXED_1800000_VSEL_table),
 386                 .table = DCDC_FIXED_1800000_VSEL_table,
 387         },
 388         {
 389                 .name = "LDO1",
 390                 .table_len = ARRAY_SIZE(TPS65023_LDO1_VSEL_table),
 391                 .table = TPS65023_LDO1_VSEL_table,
 392         },
 393         {
 394                 .name = "LDO2",
 395                 .table_len = ARRAY_SIZE(TPS65023_LDO2_VSEL_table),
 396                 .table = TPS65023_LDO2_VSEL_table,
 397         },
 398 };
 399
 400 static struct tps_driver_data tps65020_drv_data = {
 401         .info = tps65020_regs,
 402         .core_regulator = TPS65023_DCDC_3,
 403 };
 404
 405 static struct tps_driver_data tps65021_drv_data = {
 406         .info = tps65021_regs,
 407         .core_regulator = TPS65023_DCDC_3,
 408 };
 409
 410 static struct tps_driver_data tps65023_drv_data = {
 411         .info = tps65023_regs,
 412         .core_regulator = TPS65023_DCDC_1,
 413 };
 414
 415 static const struct i2c_device_id tps_65023_id[] = {
 416         {.name = "tps65023",
 417         .driver_data = (unsigned long) &tps65023_drv_data},
 418         {.name = "tps65021",
 419         .driver_data = (unsigned long) &tps65021_drv_data,},
 420         {.name = "tps65020",
 421         .driver_data = (unsigned long) &tps65020_drv_data},
 422         { },
 423 };
 424
 425 MODULE_DEVICE_TABLE(i2c, tps_65023_id);
 426
 427 static struct i2c_driver tps_65023_i2c_driver = {
 428         .driver = {
 429                 .name = "tps65023",
 430                 .owner = THIS_MODULE,
 431         },
 432         .probe = tps_65023_probe,
 433         .remove = tps_65023_remove,
 434         .id_table = tps_65023_id,
 435 };
 436
 437 static int __init tps_65023_init(void)
 438 {
 439         return i2c_add_driver(&tps_65023_i2c_driver);
 440 }
 441 subsys_initcall(tps_65023_init);
 442
 443 static void __exit tps_65023_cleanup(void)
 444 {
 445         i2c_del_driver(&tps_65023_i2c_driver);
 446 }
 447 module_exit(tps_65023_cleanup);
 448
 449 MODULE_AUTHOR("Texas Instruments");
 450 MODULE_DESCRIPTION("TPS65023 voltage regulator driver");
 451 MODULE_LICENSE("GPL v2");