linux/drivers/regulator/88pm8607.c
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   1/*
   2 * Regulators driver for Marvell 88PM8607
   3 *
   4 * Copyright (C) 2009 Marvell International Ltd.
   5 *      Haojian Zhuang <haojian.zhuang@marvell.com>
   6 *
   7 * This program is free software; you can redistribute it and/or modify
   8 * it under the terms of the GNU General Public License version 2 as
   9 * published by the Free Software Foundation.
  10 */
  11#include <linux/kernel.h>
  12#include <linux/init.h>
  13#include <linux/err.h>
  14#include <linux/i2c.h>
  15#include <linux/of.h>
  16#include <linux/regulator/of_regulator.h>
  17#include <linux/platform_device.h>
  18#include <linux/regulator/driver.h>
  19#include <linux/regulator/machine.h>
  20#include <linux/mfd/88pm860x.h>
  21#include <linux/module.h>
  22
  23struct pm8607_regulator_info {
  24        struct regulator_desc   desc;
  25        struct pm860x_chip      *chip;
  26        struct regulator_dev    *regulator;
  27        struct i2c_client       *i2c;
  28        struct i2c_client       *i2c_8606;
  29
  30        unsigned int    *vol_table;
  31        unsigned int    *vol_suspend;
  32
  33        int     slope_double;
  34};
  35
  36static const unsigned int BUCK1_table[] = {
  37         725000,  750000,  775000,  800000,  825000,  850000,  875000,  900000,
  38         925000,  950000,  975000, 1000000, 1025000, 1050000, 1075000, 1100000,
  39        1125000, 1150000, 1175000, 1200000, 1225000, 1250000, 1275000, 1300000,
  40        1325000, 1350000, 1375000, 1400000, 1425000, 1450000, 1475000, 1500000,
  41              0,   25000,   50000,   75000,  100000,  125000,  150000,  175000,
  42         200000,  225000,  250000,  275000,  300000,  325000,  350000,  375000,
  43         400000,  425000,  450000,  475000,  500000,  525000,  550000,  575000,
  44         600000,  625000,  650000,  675000,  700000,  725000,  750000,  775000,
  45};
  46
  47static const unsigned int BUCK1_suspend_table[] = {
  48              0,   25000,   50000,   75000,  100000,  125000,  150000,  175000,
  49         200000,  225000,  250000,  275000,  300000,  325000,  350000,  375000,
  50         400000,  425000,  450000,  475000,  500000,  525000,  550000,  575000,
  51         600000,  625000,  650000,  675000,  700000,  725000,  750000,  775000,
  52         800000,  825000,  850000,  875000,  900000,  925000,  950000,  975000,
  53        1000000, 1025000, 1050000, 1075000, 1100000, 1125000, 1150000, 1175000,
  54        1200000, 1225000, 1250000, 1275000, 1300000, 1325000, 1350000, 1375000,
  55        1400000, 1425000, 1450000, 1475000, 1500000, 1500000, 1500000, 1500000,
  56};
  57
  58static const unsigned int BUCK2_table[] = {
  59              0,   50000,  100000,  150000,  200000,  250000,  300000,  350000,
  60         400000,  450000,  500000,  550000,  600000,  650000,  700000,  750000,
  61         800000,  850000,  900000,  950000, 1000000, 1050000, 1100000, 1150000,
  62        1200000, 1250000, 1300000, 1350000, 1400000, 1450000, 1500000, 1550000,
  63        1600000, 1650000, 1700000, 1750000, 1800000, 1850000, 1900000, 1950000,
  64        2000000, 2050000, 2100000, 2150000, 2200000, 2250000, 2300000, 2350000,
  65        2400000, 2450000, 2500000, 2550000, 2600000, 2650000, 2700000, 2750000,
  66        2800000, 2850000, 2900000, 2950000, 3000000, 3000000, 3000000, 3000000,
  67};
  68
  69static const unsigned int BUCK2_suspend_table[] = {
  70              0,   50000,  100000,  150000,  200000,  250000,  300000,  350000,
  71         400000,  450000,  500000,  550000,  600000,  650000,  700000,  750000,
  72         800000,  850000,  900000,  950000, 1000000, 1050000, 1100000, 1150000,
  73        1200000, 1250000, 1300000, 1350000, 1400000, 1450000, 1500000, 1550000,
  74        1600000, 1650000, 1700000, 1750000, 1800000, 1850000, 1900000, 1950000,
  75        2000000, 2050000, 2100000, 2150000, 2200000, 2250000, 2300000, 2350000,
  76        2400000, 2450000, 2500000, 2550000, 2600000, 2650000, 2700000, 2750000,
  77        2800000, 2850000, 2900000, 2950000, 3000000, 3000000, 3000000, 3000000,
  78};
  79
  80static const unsigned int BUCK3_table[] = {
  81              0,   25000,   50000,   75000,  100000,  125000,  150000,  175000,
  82         200000,  225000,  250000,  275000,  300000,  325000,  350000,  375000,
  83         400000,  425000,  450000,  475000,  500000,  525000,  550000,  575000,
  84         600000,  625000,  650000,  675000,  700000,  725000,  750000,  775000,
  85         800000,  825000,  850000,  875000,  900000,  925000,  950000,  975000,
  86        1000000, 1025000, 1050000, 1075000, 1100000, 1125000, 1150000, 1175000,
  87        1200000, 1225000, 1250000, 1275000, 1300000, 1325000, 1350000, 1375000,
  88        1400000, 1425000, 1450000, 1475000, 1500000, 1500000, 1500000, 1500000,
  89};
  90
  91static const unsigned int BUCK3_suspend_table[] = {
  92              0,   25000,   50000,   75000,  100000,  125000,  150000,  175000,
  93         200000,  225000,  250000,  275000,  300000,  325000,  350000,  375000,
  94         400000,  425000,  450000,  475000,  500000,  525000,  550000,  575000,
  95         600000,  625000,  650000,  675000,  700000,  725000,  750000,  775000,
  96         800000,  825000,  850000,  875000,  900000,  925000,  950000,  975000,
  97        1000000, 1025000, 1050000, 1075000, 1100000, 1125000, 1150000, 1175000,
  98        1200000, 1225000, 1250000, 1275000, 1300000, 1325000, 1350000, 1375000,
  99        1400000, 1425000, 1450000, 1475000, 1500000, 1500000, 1500000, 1500000,
 100};
 101
 102static const unsigned int LDO1_table[] = {
 103        1800000, 1200000, 2800000, 0,
 104};
 105
 106static const unsigned int LDO1_suspend_table[] = {
 107        1800000, 1200000, 0, 0,
 108};
 109
 110static const unsigned int LDO2_table[] = {
 111        1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 3300000,
 112};
 113
 114static const unsigned int LDO2_suspend_table[] = {
 115        1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 2900000,
 116};
 117
 118static const unsigned int LDO3_table[] = {
 119        1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 3300000,
 120};
 121
 122static const unsigned int LDO3_suspend_table[] = {
 123        1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 2900000,
 124};
 125
 126static const unsigned int LDO4_table[] = {
 127        1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2900000, 3300000,
 128};
 129
 130static const unsigned int LDO4_suspend_table[] = {
 131        1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2900000, 2900000,
 132};
 133
 134static const unsigned int LDO5_table[] = {
 135        2900000, 3000000, 3100000, 3300000,
 136};
 137
 138static const unsigned int LDO5_suspend_table[] = {
 139        2900000, 0, 0, 0,
 140};
 141
 142static const unsigned int LDO6_table[] = {
 143        1800000, 1850000, 2600000, 2650000, 2700000, 2750000, 2800000, 3300000,
 144};
 145
 146static const unsigned int LDO6_suspend_table[] = {
 147        1800000, 1850000, 2600000, 2650000, 2700000, 2750000, 2800000, 2900000,
 148};
 149
 150static const unsigned int LDO7_table[] = {
 151        1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 2900000,
 152};
 153
 154static const unsigned int LDO7_suspend_table[] = {
 155        1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 2900000,
 156};
 157
 158static const unsigned int LDO8_table[] = {
 159        1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 2900000,
 160};
 161
 162static const unsigned int LDO8_suspend_table[] = {
 163        1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 2900000,
 164};
 165
 166static const unsigned int LDO9_table[] = {
 167        1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 3300000,
 168};
 169
 170static const unsigned int LDO9_suspend_table[] = {
 171        1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 2900000,
 172};
 173
 174static const unsigned int LDO10_table[] = {
 175        1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 3300000,
 176        1200000, 1200000, 1200000, 1200000, 1200000, 1200000, 1200000, 1200000,
 177};
 178
 179static const unsigned int LDO10_suspend_table[] = {
 180        1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 2900000,
 181        1200000, 1200000, 1200000, 1200000, 1200000, 1200000, 1200000, 1200000,
 182};
 183
 184static const unsigned int LDO12_table[] = {
 185        1800000, 1900000, 2700000, 2800000, 2900000, 3000000, 3100000, 3300000,
 186        1200000, 1200000, 1200000, 1200000, 1200000, 1200000, 1200000, 1200000,
 187};
 188
 189static const unsigned int LDO12_suspend_table[] = {
 190        1800000, 1900000, 2700000, 2800000, 2900000, 2900000, 2900000, 2900000,
 191        1200000, 1200000, 1200000, 1200000, 1200000, 1200000, 1200000, 1200000,
 192};
 193
 194static const unsigned int LDO13_table[] = {
 195        1200000, 1300000, 1800000, 2000000, 2500000, 2800000, 3000000, 0,
 196};
 197
 198static const unsigned int LDO13_suspend_table[] = {
 199        0,
 200};
 201
 202static const unsigned int LDO14_table[] = {
 203        1800000, 1850000, 2700000, 2750000, 2800000, 2850000, 2900000, 3300000,
 204};
 205
 206static const unsigned int LDO14_suspend_table[] = {
 207        1800000, 1850000, 2700000, 2750000, 2800000, 2850000, 2900000, 2900000,
 208};
 209
 210static int pm8607_list_voltage(struct regulator_dev *rdev, unsigned index)
 211{
 212        struct pm8607_regulator_info *info = rdev_get_drvdata(rdev);
 213        int ret = -EINVAL;
 214
 215        if (info->vol_table && (index < rdev->desc->n_voltages)) {
 216                ret = info->vol_table[index];
 217                if (info->slope_double)
 218                        ret <<= 1;
 219        }
 220        return ret;
 221}
 222
 223static int pm8606_preg_enable(struct regulator_dev *rdev)
 224{
 225        struct pm8607_regulator_info *info = rdev_get_drvdata(rdev);
 226
 227        return pm860x_set_bits(info->i2c, rdev->desc->enable_reg,
 228                               1 << rdev->desc->enable_mask, 0);
 229}
 230
 231static int pm8606_preg_disable(struct regulator_dev *rdev)
 232{
 233        struct pm8607_regulator_info *info = rdev_get_drvdata(rdev);
 234
 235        return pm860x_set_bits(info->i2c, rdev->desc->enable_reg,
 236                               1 << rdev->desc->enable_mask,
 237                               1 << rdev->desc->enable_mask);
 238}
 239
 240static int pm8606_preg_is_enabled(struct regulator_dev *rdev)
 241{
 242        struct pm8607_regulator_info *info = rdev_get_drvdata(rdev);
 243        int ret;
 244
 245        ret = pm860x_reg_read(info->i2c, rdev->desc->enable_reg);
 246        if (ret < 0)
 247                return ret;
 248
 249        return !((unsigned char)ret & (1 << rdev->desc->enable_mask));
 250}
 251
 252static struct regulator_ops pm8607_regulator_ops = {
 253        .list_voltage   = pm8607_list_voltage,
 254        .set_voltage_sel = regulator_set_voltage_sel_regmap,
 255        .get_voltage_sel = regulator_get_voltage_sel_regmap,
 256        .enable = regulator_enable_regmap,
 257        .disable = regulator_disable_regmap,
 258        .is_enabled = regulator_is_enabled_regmap,
 259};
 260
 261static struct regulator_ops pm8606_preg_ops = {
 262        .enable         = pm8606_preg_enable,
 263        .disable        = pm8606_preg_disable,
 264        .is_enabled     = pm8606_preg_is_enabled,
 265};
 266
 267#define PM8606_PREG(ereg, ebit)                                         \
 268{                                                                       \
 269        .desc   = {                                                     \
 270                .name   = "PREG",                                       \
 271                .ops    = &pm8606_preg_ops,                             \
 272                .type   = REGULATOR_CURRENT,                            \
 273                .id     = PM8606_ID_PREG,                               \
 274                .owner  = THIS_MODULE,                                  \
 275                .enable_reg = PM8606_##ereg,                            \
 276                .enable_mask = (ebit),                                  \
 277        },                                                              \
 278}
 279
 280#define PM8607_DVC(vreg, ureg, ubit, ereg, ebit)                        \
 281{                                                                       \
 282        .desc   = {                                                     \
 283                .name   = #vreg,                                        \
 284                .ops    = &pm8607_regulator_ops,                        \
 285                .type   = REGULATOR_VOLTAGE,                            \
 286                .id     = PM8607_ID_##vreg,                             \
 287                .owner  = THIS_MODULE,                                  \
 288                .n_voltages = ARRAY_SIZE(vreg##_table),                 \
 289                .vsel_reg = PM8607_##vreg,                              \
 290                .vsel_mask = ARRAY_SIZE(vreg##_table) - 1,              \
 291                .apply_reg = PM8607_##ureg,                             \
 292                .apply_bit = (ubit),                                    \
 293                .enable_reg = PM8607_##ereg,                            \
 294                .enable_mask = 1 << (ebit),                             \
 295        },                                                              \
 296        .slope_double   = (0),                                          \
 297        .vol_table      = (unsigned int *)&vreg##_table,                \
 298        .vol_suspend    = (unsigned int *)&vreg##_suspend_table,        \
 299}
 300
 301#define PM8607_LDO(_id, vreg, shift, ereg, ebit)                        \
 302{                                                                       \
 303        .desc   = {                                                     \
 304                .name   = "LDO" #_id,                                   \
 305                .ops    = &pm8607_regulator_ops,                        \
 306                .type   = REGULATOR_VOLTAGE,                            \
 307                .id     = PM8607_ID_LDO##_id,                           \
 308                .owner  = THIS_MODULE,                                  \
 309                .n_voltages = ARRAY_SIZE(LDO##_id##_table),             \
 310                .vsel_reg = PM8607_##vreg,                              \
 311                .vsel_mask = (ARRAY_SIZE(LDO##_id##_table) - 1) << (shift), \
 312                .enable_reg = PM8607_##ereg,                            \
 313                .enable_mask = 1 << (ebit),                             \
 314        },                                                              \
 315        .slope_double   = (0),                                          \
 316        .vol_table      = (unsigned int *)&LDO##_id##_table,            \
 317        .vol_suspend    = (unsigned int *)&LDO##_id##_suspend_table,    \
 318}
 319
 320static struct pm8607_regulator_info pm8607_regulator_info[] = {
 321        PM8607_DVC(BUCK1, GO, BIT(0), SUPPLIES_EN11, 0),
 322        PM8607_DVC(BUCK2, GO, BIT(1), SUPPLIES_EN11, 1),
 323        PM8607_DVC(BUCK3, GO, BIT(2), SUPPLIES_EN11, 2),
 324
 325        PM8607_LDO(1,         LDO1, 0, SUPPLIES_EN11, 3),
 326        PM8607_LDO(2,         LDO2, 0, SUPPLIES_EN11, 4),
 327        PM8607_LDO(3,         LDO3, 0, SUPPLIES_EN11, 5),
 328        PM8607_LDO(4,         LDO4, 0, SUPPLIES_EN11, 6),
 329        PM8607_LDO(5,         LDO5, 0, SUPPLIES_EN11, 7),
 330        PM8607_LDO(6,         LDO6, 0, SUPPLIES_EN12, 0),
 331        PM8607_LDO(7,         LDO7, 0, SUPPLIES_EN12, 1),
 332        PM8607_LDO(8,         LDO8, 0, SUPPLIES_EN12, 2),
 333        PM8607_LDO(9,         LDO9, 0, SUPPLIES_EN12, 3),
 334        PM8607_LDO(10,        LDO10, 0, SUPPLIES_EN12, 4),
 335        PM8607_LDO(12,        LDO12, 0, SUPPLIES_EN12, 5),
 336        PM8607_LDO(13, VIBRATOR_SET, 1, VIBRATOR_SET, 0),
 337        PM8607_LDO(14,        LDO14, 0, SUPPLIES_EN12, 6),
 338};
 339
 340static struct pm8607_regulator_info pm8606_regulator_info[] = {
 341        PM8606_PREG(PREREGULATORB, 5),
 342};
 343
 344#ifdef CONFIG_OF
 345static int pm8607_regulator_dt_init(struct platform_device *pdev,
 346                                    struct pm8607_regulator_info *info,
 347                                    struct regulator_config *config)
 348{
 349        struct device_node *nproot, *np;
 350        nproot = of_node_get(pdev->dev.parent->of_node);
 351        if (!nproot)
 352                return -ENODEV;
 353        nproot = of_find_node_by_name(nproot, "regulators");
 354        if (!nproot) {
 355                dev_err(&pdev->dev, "failed to find regulators node\n");
 356                return -ENODEV;
 357        }
 358        for_each_child_of_node(nproot, np) {
 359                if (!of_node_cmp(np->name, info->desc.name)) {
 360                        config->init_data =
 361                                of_get_regulator_init_data(&pdev->dev, np);
 362                        config->of_node = np;
 363                        break;
 364                }
 365        }
 366        of_node_put(nproot);
 367        return 0;
 368}
 369#else
 370#define pm8607_regulator_dt_init(x, y, z)       (-1)
 371#endif
 372
 373static int pm8607_regulator_probe(struct platform_device *pdev)
 374{
 375        struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent);
 376        struct pm8607_regulator_info *info = NULL;
 377        struct regulator_init_data *pdata = pdev->dev.platform_data;
 378        struct regulator_config config = { };
 379        struct resource *res;
 380        int i;
 381
 382        res = platform_get_resource(pdev, IORESOURCE_REG, 0);
 383        if (res) {
 384                /* There're resources in 88PM8607 regulator driver */
 385                for (i = 0; i < ARRAY_SIZE(pm8607_regulator_info); i++) {
 386                        info = &pm8607_regulator_info[i];
 387                        if (info->desc.vsel_reg == res->start)
 388                                break;
 389                }
 390                if (i == ARRAY_SIZE(pm8607_regulator_info)) {
 391                        dev_err(&pdev->dev, "Failed to find regulator %llu\n",
 392                                (unsigned long long)res->start);
 393                        return -EINVAL;
 394                }
 395        } else {
 396                /* There's no resource in 88PM8606 PREG regulator driver */
 397                info = &pm8606_regulator_info[0];
 398                /* i is used to check regulator ID */
 399                i = -1;
 400        }
 401        info->i2c = (chip->id == CHIP_PM8607) ? chip->client : chip->companion;
 402        info->i2c_8606 = (chip->id == CHIP_PM8607) ? chip->companion :
 403                        chip->client;
 404        info->chip = chip;
 405
 406        /* check DVC ramp slope double */
 407        if ((i == PM8607_ID_BUCK3) && info->chip->buck3_double)
 408                info->slope_double = 1;
 409
 410        config.dev = &pdev->dev;
 411        config.driver_data = info;
 412
 413        if (pm8607_regulator_dt_init(pdev, info, &config))
 414                if (pdata)
 415                        config.init_data = pdata;
 416
 417        if (chip->id == CHIP_PM8607)
 418                config.regmap = chip->regmap;
 419        else
 420                config.regmap = chip->regmap_companion;
 421
 422        info->regulator = regulator_register(&info->desc, &config);
 423        if (IS_ERR(info->regulator)) {
 424                dev_err(&pdev->dev, "failed to register regulator %s\n",
 425                        info->desc.name);
 426                return PTR_ERR(info->regulator);
 427        }
 428
 429        platform_set_drvdata(pdev, info);
 430        return 0;
 431}
 432
 433static int pm8607_regulator_remove(struct platform_device *pdev)
 434{
 435        struct pm8607_regulator_info *info = platform_get_drvdata(pdev);
 436
 437        platform_set_drvdata(pdev, NULL);
 438        regulator_unregister(info->regulator);
 439        return 0;
 440}
 441
 442static struct platform_device_id pm8607_regulator_driver_ids[] = {
 443        {
 444                .name   = "88pm860x-regulator",
 445                .driver_data    = 0,
 446        }, {
 447                .name   = "88pm860x-preg",
 448                .driver_data    = 0,
 449        },
 450        { },
 451};
 452MODULE_DEVICE_TABLE(platform, pm8607_regulator_driver_ids);
 453
 454static struct platform_driver pm8607_regulator_driver = {
 455        .driver         = {
 456                .name   = "88pm860x-regulator",
 457                .owner  = THIS_MODULE,
 458        },
 459        .probe          = pm8607_regulator_probe,
 460        .remove         = pm8607_regulator_remove,
 461        .id_table       = pm8607_regulator_driver_ids,
 462};
 463
 464static int __init pm8607_regulator_init(void)
 465{
 466        return platform_driver_register(&pm8607_regulator_driver);
 467}
 468subsys_initcall(pm8607_regulator_init);
 469
 470static void __exit pm8607_regulator_exit(void)
 471{
 472        platform_driver_unregister(&pm8607_regulator_driver);
 473}
 474module_exit(pm8607_regulator_exit);
 475
 476MODULE_LICENSE("GPL");
 477MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com>");
 478MODULE_DESCRIPTION("Regulator Driver for Marvell 88PM8607 PMIC");
 479MODULE_ALIAS("platform:88pm8607-regulator");
 480
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