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     update_reg;
  34        int     update_bit;
  35        int     slope_double;
  36};
  37
  38static const unsigned int BUCK1_table[] = {
  39         725000,  750000,  775000,  800000,  825000,  850000,  875000,  900000,
  40         925000,  950000,  975000, 1000000, 1025000, 1050000, 1075000, 1100000,
  41        1125000, 1150000, 1175000, 1200000, 1225000, 1250000, 1275000, 1300000,
  42        1325000, 1350000, 1375000, 1400000, 1425000, 1450000, 1475000, 1500000,
  43              0,   25000,   50000,   75000,  100000,  125000,  150000,  175000,
  44         200000,  225000,  250000,  275000,  300000,  325000,  350000,  375000,
  45         400000,  425000,  450000,  475000,  500000,  525000,  550000,  575000,
  46         600000,  625000,  650000,  675000,  700000,  725000,  750000,  775000,
  47};
  48
  49static const unsigned int BUCK1_suspend_table[] = {
  50              0,   25000,   50000,   75000,  100000,  125000,  150000,  175000,
  51         200000,  225000,  250000,  275000,  300000,  325000,  350000,  375000,
  52         400000,  425000,  450000,  475000,  500000,  525000,  550000,  575000,
  53         600000,  625000,  650000,  675000,  700000,  725000,  750000,  775000,
  54         800000,  825000,  850000,  875000,  900000,  925000,  950000,  975000,
  55        1000000, 1025000, 1050000, 1075000, 1100000, 1125000, 1150000, 1175000,
  56        1200000, 1225000, 1250000, 1275000, 1300000, 1325000, 1350000, 1375000,
  57        1400000, 1425000, 1450000, 1475000, 1500000, 1500000, 1500000, 1500000,
  58};
  59
  60static const unsigned int BUCK2_table[] = {
  61              0,   50000,  100000,  150000,  200000,  250000,  300000,  350000,
  62         400000,  450000,  500000,  550000,  600000,  650000,  700000,  750000,
  63         800000,  850000,  900000,  950000, 1000000, 1050000, 1100000, 1150000,
  64        1200000, 1250000, 1300000, 1350000, 1400000, 1450000, 1500000, 1550000,
  65        1600000, 1650000, 1700000, 1750000, 1800000, 1850000, 1900000, 1950000,
  66        2000000, 2050000, 2100000, 2150000, 2200000, 2250000, 2300000, 2350000,
  67        2400000, 2450000, 2500000, 2550000, 2600000, 2650000, 2700000, 2750000,
  68        2800000, 2850000, 2900000, 2950000, 3000000, 3000000, 3000000, 3000000,
  69};
  70
  71static const unsigned int BUCK2_suspend_table[] = {
  72              0,   50000,  100000,  150000,  200000,  250000,  300000,  350000,
  73         400000,  450000,  500000,  550000,  600000,  650000,  700000,  750000,
  74         800000,  850000,  900000,  950000, 1000000, 1050000, 1100000, 1150000,
  75        1200000, 1250000, 1300000, 1350000, 1400000, 1450000, 1500000, 1550000,
  76        1600000, 1650000, 1700000, 1750000, 1800000, 1850000, 1900000, 1950000,
  77        2000000, 2050000, 2100000, 2150000, 2200000, 2250000, 2300000, 2350000,
  78        2400000, 2450000, 2500000, 2550000, 2600000, 2650000, 2700000, 2750000,
  79        2800000, 2850000, 2900000, 2950000, 3000000, 3000000, 3000000, 3000000,
  80};
  81
  82static const unsigned int BUCK3_table[] = {
  83              0,   25000,   50000,   75000,  100000,  125000,  150000,  175000,
  84         200000,  225000,  250000,  275000,  300000,  325000,  350000,  375000,
  85         400000,  425000,  450000,  475000,  500000,  525000,  550000,  575000,
  86         600000,  625000,  650000,  675000,  700000,  725000,  750000,  775000,
  87         800000,  825000,  850000,  875000,  900000,  925000,  950000,  975000,
  88        1000000, 1025000, 1050000, 1075000, 1100000, 1125000, 1150000, 1175000,
  89        1200000, 1225000, 1250000, 1275000, 1300000, 1325000, 1350000, 1375000,
  90        1400000, 1425000, 1450000, 1475000, 1500000, 1500000, 1500000, 1500000,
  91};
  92
  93static const unsigned int BUCK3_suspend_table[] = {
  94              0,   25000,   50000,   75000,  100000,  125000,  150000,  175000,
  95         200000,  225000,  250000,  275000,  300000,  325000,  350000,  375000,
  96         400000,  425000,  450000,  475000,  500000,  525000,  550000,  575000,
  97         600000,  625000,  650000,  675000,  700000,  725000,  750000,  775000,
  98         800000,  825000,  850000,  875000,  900000,  925000,  950000,  975000,
  99        1000000, 1025000, 1050000, 1075000, 1100000, 1125000, 1150000, 1175000,
 100        1200000, 1225000, 1250000, 1275000, 1300000, 1325000, 1350000, 1375000,
 101        1400000, 1425000, 1450000, 1475000, 1500000, 1500000, 1500000, 1500000,
 102};
 103
 104static const unsigned int LDO1_table[] = {
 105        1800000, 1200000, 2800000, 0,
 106};
 107
 108static const unsigned int LDO1_suspend_table[] = {
 109        1800000, 1200000, 0, 0,
 110};
 111
 112static const unsigned int LDO2_table[] = {
 113        1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 3300000,
 114};
 115
 116static const unsigned int LDO2_suspend_table[] = {
 117        1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 2900000,
 118};
 119
 120static const unsigned int LDO3_table[] = {
 121        1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 3300000,
 122};
 123
 124static const unsigned int LDO3_suspend_table[] = {
 125        1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 2900000,
 126};
 127
 128static const unsigned int LDO4_table[] = {
 129        1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2900000, 3300000,
 130};
 131
 132static const unsigned int LDO4_suspend_table[] = {
 133        1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2900000, 2900000,
 134};
 135
 136static const unsigned int LDO5_table[] = {
 137        2900000, 3000000, 3100000, 3300000,
 138};
 139
 140static const unsigned int LDO5_suspend_table[] = {
 141        2900000, 0, 0, 0,
 142};
 143
 144static const unsigned int LDO6_table[] = {
 145        1800000, 1850000, 2600000, 2650000, 2700000, 2750000, 2800000, 3300000,
 146};
 147
 148static const unsigned int LDO6_suspend_table[] = {
 149        1800000, 1850000, 2600000, 2650000, 2700000, 2750000, 2800000, 2900000,
 150};
 151
 152static const unsigned int LDO7_table[] = {
 153        1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 2900000,
 154};
 155
 156static const unsigned int LDO7_suspend_table[] = {
 157        1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 2900000,
 158};
 159
 160static const unsigned int LDO8_table[] = {
 161        1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 2900000,
 162};
 163
 164static const unsigned int LDO8_suspend_table[] = {
 165        1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 2900000,
 166};
 167
 168static const unsigned int LDO9_table[] = {
 169        1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 3300000,
 170};
 171
 172static const unsigned int LDO9_suspend_table[] = {
 173        1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 2900000,
 174};
 175
 176static const unsigned int LDO10_table[] = {
 177        1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 3300000,
 178        1200000, 1200000, 1200000, 1200000, 1200000, 1200000, 1200000, 1200000,
 179};
 180
 181static const unsigned int LDO10_suspend_table[] = {
 182        1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 2900000,
 183        1200000, 1200000, 1200000, 1200000, 1200000, 1200000, 1200000, 1200000,
 184};
 185
 186static const unsigned int LDO12_table[] = {
 187        1800000, 1900000, 2700000, 2800000, 2900000, 3000000, 3100000, 3300000,
 188        1200000, 1200000, 1200000, 1200000, 1200000, 1200000, 1200000, 1200000,
 189};
 190
 191static const unsigned int LDO12_suspend_table[] = {
 192        1800000, 1900000, 2700000, 2800000, 2900000, 2900000, 2900000, 2900000,
 193        1200000, 1200000, 1200000, 1200000, 1200000, 1200000, 1200000, 1200000,
 194};
 195
 196static const unsigned int LDO13_table[] = {
 197        1200000, 1300000, 1800000, 2000000, 2500000, 2800000, 3000000, 0,
 198};
 199
 200static const unsigned int LDO13_suspend_table[] = {
 201        0,
 202};
 203
 204static const unsigned int LDO14_table[] = {
 205        1800000, 1850000, 2700000, 2750000, 2800000, 2850000, 2900000, 3300000,
 206};
 207
 208static const unsigned int LDO14_suspend_table[] = {
 209        1800000, 1850000, 2700000, 2750000, 2800000, 2850000, 2900000, 2900000,
 210};
 211
 212static int pm8607_list_voltage(struct regulator_dev *rdev, unsigned index)
 213{
 214        struct pm8607_regulator_info *info = rdev_get_drvdata(rdev);
 215        int ret = -EINVAL;
 216
 217        if (info->vol_table && (index < rdev->desc->n_voltages)) {
 218                ret = info->vol_table[index];
 219                if (info->slope_double)
 220                        ret <<= 1;
 221        }
 222        return ret;
 223}
 224
 225static int pm8607_set_voltage_sel(struct regulator_dev *rdev, unsigned selector)
 226{
 227        struct pm8607_regulator_info *info = rdev_get_drvdata(rdev);
 228        uint8_t val;
 229        int ret;
 230
 231        val = (uint8_t)(selector << (ffs(rdev->desc->vsel_mask) - 1));
 232
 233        ret = pm860x_set_bits(info->i2c, rdev->desc->vsel_reg,
 234                              rdev->desc->vsel_mask, val);
 235        if (ret)
 236                return ret;
 237        switch (info->desc.id) {
 238        case PM8607_ID_BUCK1:
 239        case PM8607_ID_BUCK3:
 240                ret = pm860x_set_bits(info->i2c, info->update_reg,
 241                                      1 << info->update_bit,
 242                                      1 << info->update_bit);
 243                break;
 244        }
 245        return ret;
 246}
 247
 248static int pm8606_preg_enable(struct regulator_dev *rdev)
 249{
 250        struct pm8607_regulator_info *info = rdev_get_drvdata(rdev);
 251
 252        return pm860x_set_bits(info->i2c, rdev->desc->enable_reg,
 253                               1 << rdev->desc->enable_mask, 0);
 254}
 255
 256static int pm8606_preg_disable(struct regulator_dev *rdev)
 257{
 258        struct pm8607_regulator_info *info = rdev_get_drvdata(rdev);
 259
 260        return pm860x_set_bits(info->i2c, rdev->desc->enable_reg,
 261                               1 << rdev->desc->enable_mask,
 262                               1 << rdev->desc->enable_mask);
 263}
 264
 265static int pm8606_preg_is_enabled(struct regulator_dev *rdev)
 266{
 267        struct pm8607_regulator_info *info = rdev_get_drvdata(rdev);
 268        int ret;
 269
 270        ret = pm860x_reg_read(info->i2c, rdev->desc->enable_reg);
 271        if (ret < 0)
 272                return ret;
 273
 274        return !((unsigned char)ret & (1 << rdev->desc->enable_mask));
 275}
 276
 277static struct regulator_ops pm8607_regulator_ops = {
 278        .list_voltage   = pm8607_list_voltage,
 279        .set_voltage_sel = pm8607_set_voltage_sel,
 280        .get_voltage_sel = regulator_get_voltage_sel_regmap,
 281        .enable = regulator_enable_regmap,
 282        .disable = regulator_disable_regmap,
 283        .is_enabled = regulator_is_enabled_regmap,
 284};
 285
 286static struct regulator_ops pm8606_preg_ops = {
 287        .enable         = pm8606_preg_enable,
 288        .disable        = pm8606_preg_disable,
 289        .is_enabled     = pm8606_preg_is_enabled,
 290};
 291
 292#define PM8606_PREG(ereg, ebit)                                         \
 293{                                                                       \
 294        .desc   = {                                                     \
 295                .name   = "PREG",                                       \
 296                .ops    = &pm8606_preg_ops,                             \
 297                .type   = REGULATOR_CURRENT,                            \
 298                .id     = PM8606_ID_PREG,                               \
 299                .owner  = THIS_MODULE,                                  \
 300                .enable_reg = PM8606_##ereg,                            \
 301                .enable_mask = (ebit),                                  \
 302        },                                                              \
 303}
 304
 305#define PM8607_DVC(vreg, ureg, ubit, ereg, ebit)                        \
 306{                                                                       \
 307        .desc   = {                                                     \
 308                .name   = #vreg,                                        \
 309                .ops    = &pm8607_regulator_ops,                        \
 310                .type   = REGULATOR_VOLTAGE,                            \
 311                .id     = PM8607_ID_##vreg,                             \
 312                .owner  = THIS_MODULE,                                  \
 313                .n_voltages = ARRAY_SIZE(vreg##_table),                 \
 314                .vsel_reg = PM8607_##vreg,                              \
 315                .vsel_mask = ARRAY_SIZE(vreg##_table) - 1,              \
 316                .enable_reg = PM8607_##ereg,                            \
 317                .enable_mask = 1 << (ebit),                             \
 318        },                                                              \
 319        .update_reg     = PM8607_##ureg,                                \
 320        .update_bit     = (ubit),                                       \
 321        .slope_double   = (0),                                          \
 322        .vol_table      = (unsigned int *)&vreg##_table,                \
 323        .vol_suspend    = (unsigned int *)&vreg##_suspend_table,        \
 324}
 325
 326#define PM8607_LDO(_id, vreg, shift, ereg, ebit)                        \
 327{                                                                       \
 328        .desc   = {                                                     \
 329                .name   = "LDO" #_id,                                   \
 330                .ops    = &pm8607_regulator_ops,                        \
 331                .type   = REGULATOR_VOLTAGE,                            \
 332                .id     = PM8607_ID_LDO##_id,                           \
 333                .owner  = THIS_MODULE,                                  \
 334                .n_voltages = ARRAY_SIZE(LDO##_id##_table),             \
 335                .vsel_reg = PM8607_##vreg,                              \
 336                .vsel_mask = (ARRAY_SIZE(LDO##_id##_table) - 1) << (shift), \
 337                .enable_reg = PM8607_##ereg,                            \
 338                .enable_mask = 1 << (ebit),                             \
 339        },                                                              \
 340        .slope_double   = (0),                                          \
 341        .vol_table      = (unsigned int *)&LDO##_id##_table,            \
 342        .vol_suspend    = (unsigned int *)&LDO##_id##_suspend_table,    \
 343}
 344
 345static struct pm8607_regulator_info pm8607_regulator_info[] = {
 346        PM8607_DVC(BUCK1, GO, 0, SUPPLIES_EN11, 0),
 347        PM8607_DVC(BUCK2, GO, 1, SUPPLIES_EN11, 1),
 348        PM8607_DVC(BUCK3, GO, 2, SUPPLIES_EN11, 2),
 349
 350        PM8607_LDO(1,         LDO1, 0, SUPPLIES_EN11, 3),
 351        PM8607_LDO(2,         LDO2, 0, SUPPLIES_EN11, 4),
 352        PM8607_LDO(3,         LDO3, 0, SUPPLIES_EN11, 5),
 353        PM8607_LDO(4,         LDO4, 0, SUPPLIES_EN11, 6),
 354        PM8607_LDO(5,         LDO5, 0, SUPPLIES_EN11, 7),
 355        PM8607_LDO(6,         LDO6, 0, SUPPLIES_EN12, 0),
 356        PM8607_LDO(7,         LDO7, 0, SUPPLIES_EN12, 1),
 357        PM8607_LDO(8,         LDO8, 0, SUPPLIES_EN12, 2),
 358        PM8607_LDO(9,         LDO9, 0, SUPPLIES_EN12, 3),
 359        PM8607_LDO(10,        LDO10, 0, SUPPLIES_EN12, 4),
 360        PM8607_LDO(12,        LDO12, 0, SUPPLIES_EN12, 5),
 361        PM8607_LDO(13, VIBRATOR_SET, 1, VIBRATOR_SET, 0),
 362        PM8607_LDO(14,        LDO14, 0, SUPPLIES_EN12, 6),
 363};
 364
 365static struct pm8607_regulator_info pm8606_regulator_info[] = {
 366        PM8606_PREG(PREREGULATORB, 5),
 367};
 368
 369#ifdef CONFIG_OF
 370static int pm8607_regulator_dt_init(struct platform_device *pdev,
 371                                    struct pm8607_regulator_info *info,
 372                                    struct regulator_config *config)
 373{
 374        struct device_node *nproot, *np;
 375        nproot = pdev->dev.parent->of_node;
 376        if (!nproot)
 377                return -ENODEV;
 378        nproot = of_find_node_by_name(nproot, "regulators");
 379        if (!nproot) {
 380                dev_err(&pdev->dev, "failed to find regulators node\n");
 381                return -ENODEV;
 382        }
 383        for_each_child_of_node(nproot, np) {
 384                if (!of_node_cmp(np->name, info->desc.name)) {
 385                        config->init_data =
 386                                of_get_regulator_init_data(&pdev->dev, np);
 387                        config->of_node = np;
 388                        break;
 389                }
 390        }
 391        return 0;
 392}
 393#else
 394#define pm8607_regulator_dt_init(x, y, z)       (-1)
 395#endif
 396
 397static int __devinit pm8607_regulator_probe(struct platform_device *pdev)
 398{
 399        struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent);
 400        struct pm8607_regulator_info *info = NULL;
 401        struct regulator_init_data *pdata = pdev->dev.platform_data;
 402        struct regulator_config config = { };
 403        struct resource *res;
 404        int i;
 405
 406        res = platform_get_resource(pdev, IORESOURCE_REG, 0);
 407        if (res) {
 408                /* There're resources in 88PM8607 regulator driver */
 409                for (i = 0; i < ARRAY_SIZE(pm8607_regulator_info); i++) {
 410                        info = &pm8607_regulator_info[i];
 411                        if (info->desc.vsel_reg == res->start)
 412                                break;
 413                }
 414                if (i == ARRAY_SIZE(pm8607_regulator_info)) {
 415                        dev_err(&pdev->dev, "Failed to find regulator %llu\n",
 416                                (unsigned long long)res->start);
 417                        return -EINVAL;
 418                }
 419        } else {
 420                /* There's no resource in 88PM8606 PREG regulator driver */
 421                info = &pm8606_regulator_info[0];
 422                /* i is used to check regulator ID */
 423                i = -1;
 424        }
 425        info->i2c = (chip->id == CHIP_PM8607) ? chip->client : chip->companion;
 426        info->i2c_8606 = (chip->id == CHIP_PM8607) ? chip->companion :
 427                        chip->client;
 428        info->chip = chip;
 429
 430        /* check DVC ramp slope double */
 431        if ((i == PM8607_ID_BUCK3) && info->chip->buck3_double)
 432                info->slope_double = 1;
 433
 434        config.dev = &pdev->dev;
 435        config.driver_data = info;
 436
 437        if (pm8607_regulator_dt_init(pdev, info, &config))
 438                if (pdata)
 439                        config.init_data = pdata;
 440
 441        if (chip->id == CHIP_PM8607)
 442                config.regmap = chip->regmap;
 443        else
 444                config.regmap = chip->regmap_companion;
 445
 446        info->regulator = regulator_register(&info->desc, &config);
 447        if (IS_ERR(info->regulator)) {
 448                dev_err(&pdev->dev, "failed to register regulator %s\n",
 449                        info->desc.name);
 450                return PTR_ERR(info->regulator);
 451        }
 452
 453        platform_set_drvdata(pdev, info);
 454        return 0;
 455}
 456
 457static int __devexit pm8607_regulator_remove(struct platform_device *pdev)
 458{
 459        struct pm8607_regulator_info *info = platform_get_drvdata(pdev);
 460
 461        platform_set_drvdata(pdev, NULL);
 462        regulator_unregister(info->regulator);
 463        return 0;
 464}
 465
 466static struct platform_device_id pm8607_regulator_driver_ids[] = {
 467        {
 468                .name   = "88pm860x-regulator",
 469                .driver_data    = 0,
 470        }, {
 471                .name   = "88pm860x-preg",
 472                .driver_data    = 0,
 473        },
 474        { },
 475};
 476MODULE_DEVICE_TABLE(platform, pm8607_regulator_driver_ids);
 477
 478static struct platform_driver pm8607_regulator_driver = {
 479        .driver         = {
 480                .name   = "88pm860x-regulator",
 481                .owner  = THIS_MODULE,
 482        },
 483        .probe          = pm8607_regulator_probe,
 484        .remove         = __devexit_p(pm8607_regulator_remove),
 485        .id_table       = pm8607_regulator_driver_ids,
 486};
 487
 488static int __init pm8607_regulator_init(void)
 489{
 490        return platform_driver_register(&pm8607_regulator_driver);
 491}
 492subsys_initcall(pm8607_regulator_init);
 493
 494static void __exit pm8607_regulator_exit(void)
 495{
 496        platform_driver_unregister(&pm8607_regulator_driver);
 497}
 498module_exit(pm8607_regulator_exit);
 499
 500MODULE_LICENSE("GPL");
 501MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com>");
 502MODULE_DESCRIPTION("Regulator Driver for Marvell 88PM8607 PMIC");
 503MODULE_ALIAS("platform:88pm8607-regulator");
 504
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