linux/drivers/regulator/tps65023-regulator.c
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   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 */
  90static 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
 101static const unsigned int DCDC_FIXED_3300000_VSEL_table[] = {
 102        3300000,
 103};
 104
 105static const unsigned int DCDC_FIXED_1800000_VSEL_table[] = {
 106        1800000,
 107};
 108
 109/* Supported voltage values for LDO regulators for tps65020 */
 110static 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 */
 117static const unsigned int TPS65023_LDO1_VSEL_table[] = {
 118        1000000, 1100000, 1300000, 1800000,
 119        2200000, 2600000, 2800000, 3150000,
 120};
 121
 122static const unsigned int TPS65023_LDO2_VSEL_table[] = {
 123        1050000, 1200000, 1300000, 1800000,
 124        2500000, 2800000, 3000000, 3300000,
 125};
 126
 127/* Regulator specific details */
 128struct tps_info {
 129        const char *name;
 130        u8 table_len;
 131        const unsigned int *table;
 132};
 133
 134/* PMIC details */
 135struct 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 */
 144struct tps_driver_data {
 145        const struct tps_info *info;
 146        u8 core_regulator;
 147};
 148
 149static 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
 163static 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 */
 176static 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 */
 187static 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
 197static struct regmap_config tps65023_regmap_config = {
 198        .reg_bits = 8,
 199        .val_bits = 8,
 200};
 201
 202static 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
 306static 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
 316static 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
 344static 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
 372static 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
 400static struct tps_driver_data tps65020_drv_data = {
 401        .info = tps65020_regs,
 402        .core_regulator = TPS65023_DCDC_3,
 403};
 404
 405static struct tps_driver_data tps65021_drv_data = {
 406        .info = tps65021_regs,
 407        .core_regulator = TPS65023_DCDC_3,
 408};
 409
 410static struct tps_driver_data tps65023_drv_data = {
 411        .info = tps65023_regs,
 412        .core_regulator = TPS65023_DCDC_1,
 413};
 414
 415static 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
 425MODULE_DEVICE_TABLE(i2c, tps_65023_id);
 426
 427static 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
 437static int __init tps_65023_init(void)
 438{
 439        return i2c_add_driver(&tps_65023_i2c_driver);
 440}
 441subsys_initcall(tps_65023_init);
 442
 443static void __exit tps_65023_cleanup(void)
 444{
 445        i2c_del_driver(&tps_65023_i2c_driver);
 446}
 447module_exit(tps_65023_cleanup);
 448
 449MODULE_AUTHOR("Texas Instruments");
 450MODULE_DESCRIPTION("TPS65023 voltage regulator driver");
 451MODULE_LICENSE("GPL v2");
 452
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