linux/drivers/regulator/88pm800.c
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   1/*
   2 * Regulators driver for Marvell 88PM800
   3 *
   4 * Copyright (C) 2012 Marvell International Ltd.
   5 * Joseph(Yossi) Hanin <yhanin@marvell.com>
   6 * Yi Zhang <yizhang@marvell.com>
   7 *
   8 * This program is free software; you can redistribute it and/or modify
   9 * it under the terms of the GNU General Public License version 2 as
  10 * published by the Free Software Foundation.
  11 */
  12#include <linux/module.h>
  13#include <linux/moduleparam.h>
  14#include <linux/init.h>
  15#include <linux/err.h>
  16#include <linux/regmap.h>
  17#include <linux/regulator/driver.h>
  18#include <linux/regulator/machine.h>
  19#include <linux/mfd/88pm80x.h>
  20#include <linux/delay.h>
  21#include <linux/io.h>
  22#include <linux/of.h>
  23#include <linux/regulator/of_regulator.h>
  24
  25/* LDO1 with DVC[0..3] */
  26#define PM800_LDO1_VOUT         (0x08) /* VOUT1 */
  27#define PM800_LDO1_VOUT_2       (0x09)
  28#define PM800_LDO1_VOUT_3       (0x0A)
  29#define PM800_LDO2_VOUT         (0x0B)
  30#define PM800_LDO3_VOUT         (0x0C)
  31#define PM800_LDO4_VOUT         (0x0D)
  32#define PM800_LDO5_VOUT         (0x0E)
  33#define PM800_LDO6_VOUT         (0x0F)
  34#define PM800_LDO7_VOUT         (0x10)
  35#define PM800_LDO8_VOUT         (0x11)
  36#define PM800_LDO9_VOUT         (0x12)
  37#define PM800_LDO10_VOUT        (0x13)
  38#define PM800_LDO11_VOUT        (0x14)
  39#define PM800_LDO12_VOUT        (0x15)
  40#define PM800_LDO13_VOUT        (0x16)
  41#define PM800_LDO14_VOUT        (0x17)
  42#define PM800_LDO15_VOUT        (0x18)
  43#define PM800_LDO16_VOUT        (0x19)
  44#define PM800_LDO17_VOUT        (0x1A)
  45#define PM800_LDO18_VOUT        (0x1B)
  46#define PM800_LDO19_VOUT        (0x1C)
  47
  48/* BUCK1 with DVC[0..3] */
  49#define PM800_BUCK1             (0x3C)
  50#define PM800_BUCK1_1           (0x3D)
  51#define PM800_BUCK1_2           (0x3E)
  52#define PM800_BUCK1_3           (0x3F)
  53#define PM800_BUCK2             (0x40)
  54#define PM800_BUCK3             (0x41)
  55#define PM800_BUCK3             (0x41)
  56#define PM800_BUCK4             (0x42)
  57#define PM800_BUCK4_1           (0x43)
  58#define PM800_BUCK4_2           (0x44)
  59#define PM800_BUCK4_3           (0x45)
  60#define PM800_BUCK5             (0x46)
  61
  62#define PM800_BUCK_ENA          (0x50)
  63#define PM800_LDO_ENA1_1        (0x51)
  64#define PM800_LDO_ENA1_2        (0x52)
  65#define PM800_LDO_ENA1_3        (0x53)
  66
  67#define PM800_LDO_ENA2_1        (0x56)
  68#define PM800_LDO_ENA2_2        (0x57)
  69#define PM800_LDO_ENA2_3        (0x58)
  70
  71#define PM800_BUCK1_MISC1       (0x78)
  72#define PM800_BUCK3_MISC1       (0x7E)
  73#define PM800_BUCK4_MISC1       (0x81)
  74#define PM800_BUCK5_MISC1       (0x84)
  75
  76struct pm800_regulator_info {
  77        struct regulator_desc desc;
  78        int max_ua;
  79};
  80
  81struct pm800_regulators {
  82        struct regulator_dev *regulators[PM800_ID_RG_MAX];
  83        struct pm80x_chip *chip;
  84        struct regmap *map;
  85};
  86
  87/*
  88 * vreg - the buck regs string.
  89 * ereg - the string for the enable register.
  90 * ebit - the bit number in the enable register.
  91 * amax - the current
  92 * Buck has 2 kinds of voltage steps. It is easy to find voltage by ranges,
  93 * not the constant voltage table.
  94 * n_volt - Number of available selectors
  95 */
  96#define PM800_BUCK(vreg, ereg, ebit, amax, volt_ranges, n_volt)         \
  97{                                                                       \
  98        .desc   = {                                                     \
  99                .name   = #vreg,                                        \
 100                .ops    = &pm800_volt_range_ops,                        \
 101                .type   = REGULATOR_VOLTAGE,                            \
 102                .id     = PM800_ID_##vreg,                              \
 103                .owner  = THIS_MODULE,                                  \
 104                .n_voltages             = n_volt,                       \
 105                .linear_ranges          = volt_ranges,                  \
 106                .n_linear_ranges        = ARRAY_SIZE(volt_ranges),      \
 107                .vsel_reg               = PM800_##vreg,                 \
 108                .vsel_mask              = 0x7f,                         \
 109                .enable_reg             = PM800_##ereg,                 \
 110                .enable_mask            = 1 << (ebit),                  \
 111        },                                                              \
 112        .max_ua         = (amax),                                       \
 113}
 114
 115/*
 116 * vreg - the LDO regs string
 117 * ereg -  the string for the enable register.
 118 * ebit - the bit number in the enable register.
 119 * amax - the current
 120 * volt_table - the LDO voltage table
 121 * For all the LDOes, there are too many ranges. Using volt_table will be
 122 * simpler and faster.
 123 */
 124#define PM800_LDO(vreg, ereg, ebit, amax, ldo_volt_table)               \
 125{                                                                       \
 126        .desc   = {                                                     \
 127                .name   = #vreg,                                        \
 128                .ops    = &pm800_volt_table_ops,                        \
 129                .type   = REGULATOR_VOLTAGE,                            \
 130                .id     = PM800_ID_##vreg,                              \
 131                .owner  = THIS_MODULE,                                  \
 132                .n_voltages = ARRAY_SIZE(ldo_volt_table),               \
 133                .vsel_reg       = PM800_##vreg##_VOUT,                  \
 134                .vsel_mask      = 0x1f,                                 \
 135                .enable_reg     = PM800_##ereg,                         \
 136                .enable_mask    = 1 << (ebit),                          \
 137                .volt_table     = ldo_volt_table,                       \
 138        },                                                              \
 139        .max_ua         = (amax),                                       \
 140}
 141
 142/* Ranges are sorted in ascending order. */
 143static const struct regulator_linear_range buck1_volt_range[] = {
 144        { .min_uV = 600000, .max_uV = 1587500, .min_sel = 0, .max_sel = 0x4f,
 145          .uV_step = 12500 },
 146        { .min_uV = 1600000, .max_uV = 1800000, .min_sel = 0x50,
 147          .max_sel = 0x54, .uV_step = 50000 },
 148};
 149
 150/* BUCK 2~5 have same ranges. */
 151static const struct regulator_linear_range buck2_5_volt_range[] = {
 152        { .min_uV = 600000, .max_uV = 1587500,  .min_sel = 0, .max_sel = 0x4f,
 153          .uV_step = 12500 },
 154        { .min_uV = 1600000, .max_uV = 3300000, .min_sel = 0x50,
 155          .max_sel = 0x72, .uV_step = 50000 },
 156};
 157
 158static const unsigned int ldo1_volt_table[] = {
 159        600000,  650000,  700000,  750000,  800000,  850000,  900000,  950000,
 160        1000000, 1050000, 1100000, 1150000, 1200000, 1300000, 1400000, 1500000,
 161};
 162
 163static const unsigned int ldo2_volt_table[] = {
 164        1700000, 1800000, 1900000, 2000000, 2100000, 2500000, 2700000, 2800000,
 165};
 166
 167/* LDO 3~17 have same voltage table. */
 168static const unsigned int ldo3_17_volt_table[] = {
 169        1200000, 1250000, 1700000, 1800000, 1850000, 1900000, 2500000, 2600000,
 170        2700000, 2750000, 2800000, 2850000, 2900000, 3000000, 3100000, 3300000,
 171};
 172
 173/* LDO 18~19 have same voltage table. */
 174static const unsigned int ldo18_19_volt_table[] = {
 175        1700000, 1800000, 1900000, 2500000, 2800000, 2900000, 3100000, 3300000,
 176};
 177
 178static int pm800_get_current_limit(struct regulator_dev *rdev)
 179{
 180        struct pm800_regulator_info *info = rdev_get_drvdata(rdev);
 181
 182        return info->max_ua;
 183}
 184
 185static struct regulator_ops pm800_volt_range_ops = {
 186        .list_voltage = regulator_list_voltage_linear_range,
 187        .map_voltage = regulator_map_voltage_linear_range,
 188        .set_voltage_sel = regulator_set_voltage_sel_regmap,
 189        .get_voltage_sel = regulator_get_voltage_sel_regmap,
 190        .enable = regulator_enable_regmap,
 191        .disable = regulator_disable_regmap,
 192        .is_enabled = regulator_is_enabled_regmap,
 193        .get_current_limit = pm800_get_current_limit,
 194};
 195
 196static struct regulator_ops pm800_volt_table_ops = {
 197        .list_voltage = regulator_list_voltage_table,
 198        .map_voltage = regulator_map_voltage_iterate,
 199        .set_voltage_sel = regulator_set_voltage_sel_regmap,
 200        .get_voltage_sel = regulator_get_voltage_sel_regmap,
 201        .enable = regulator_enable_regmap,
 202        .disable = regulator_disable_regmap,
 203        .is_enabled = regulator_is_enabled_regmap,
 204        .get_current_limit = pm800_get_current_limit,
 205};
 206
 207/* The array is indexed by id(PM800_ID_XXX) */
 208static struct pm800_regulator_info pm800_regulator_info[] = {
 209        PM800_BUCK(BUCK1, BUCK_ENA, 0, 3000000, buck1_volt_range, 0x55),
 210        PM800_BUCK(BUCK2, BUCK_ENA, 1, 1200000, buck2_5_volt_range, 0x73),
 211        PM800_BUCK(BUCK3, BUCK_ENA, 2, 1200000, buck2_5_volt_range, 0x73),
 212        PM800_BUCK(BUCK4, BUCK_ENA, 3, 1200000, buck2_5_volt_range, 0x73),
 213        PM800_BUCK(BUCK5, BUCK_ENA, 4, 1200000, buck2_5_volt_range, 0x73),
 214
 215        PM800_LDO(LDO1, LDO_ENA1_1, 0, 200000, ldo1_volt_table),
 216        PM800_LDO(LDO2, LDO_ENA1_1, 1, 10000, ldo2_volt_table),
 217        PM800_LDO(LDO3, LDO_ENA1_1, 2, 300000, ldo3_17_volt_table),
 218        PM800_LDO(LDO4, LDO_ENA1_1, 3, 300000, ldo3_17_volt_table),
 219        PM800_LDO(LDO5, LDO_ENA1_1, 4, 300000, ldo3_17_volt_table),
 220        PM800_LDO(LDO6, LDO_ENA1_1, 5, 300000, ldo3_17_volt_table),
 221        PM800_LDO(LDO7, LDO_ENA1_1, 6, 300000, ldo3_17_volt_table),
 222        PM800_LDO(LDO8, LDO_ENA1_1, 7, 300000, ldo3_17_volt_table),
 223        PM800_LDO(LDO9, LDO_ENA1_2, 0, 300000, ldo3_17_volt_table),
 224        PM800_LDO(LDO10, LDO_ENA1_2, 1, 300000, ldo3_17_volt_table),
 225        PM800_LDO(LDO11, LDO_ENA1_2, 2, 300000, ldo3_17_volt_table),
 226        PM800_LDO(LDO12, LDO_ENA1_2, 3, 300000, ldo3_17_volt_table),
 227        PM800_LDO(LDO13, LDO_ENA1_2, 4, 300000, ldo3_17_volt_table),
 228        PM800_LDO(LDO14, LDO_ENA1_2, 5, 300000, ldo3_17_volt_table),
 229        PM800_LDO(LDO15, LDO_ENA1_2, 6, 300000, ldo3_17_volt_table),
 230        PM800_LDO(LDO16, LDO_ENA1_2, 7, 300000, ldo3_17_volt_table),
 231        PM800_LDO(LDO17, LDO_ENA1_3, 0, 300000, ldo3_17_volt_table),
 232        PM800_LDO(LDO18, LDO_ENA1_3, 1, 200000, ldo18_19_volt_table),
 233        PM800_LDO(LDO19, LDO_ENA1_3, 2, 200000, ldo18_19_volt_table),
 234};
 235
 236#define PM800_REGULATOR_OF_MATCH(_name, _id)                            \
 237        [PM800_ID_##_id] = {                                            \
 238                .name = #_name,                                         \
 239                .driver_data = &pm800_regulator_info[PM800_ID_##_id],   \
 240        }
 241
 242static struct of_regulator_match pm800_regulator_matches[] = {
 243        PM800_REGULATOR_OF_MATCH(buck1, BUCK1),
 244        PM800_REGULATOR_OF_MATCH(buck2, BUCK2),
 245        PM800_REGULATOR_OF_MATCH(buck3, BUCK3),
 246        PM800_REGULATOR_OF_MATCH(buck4, BUCK4),
 247        PM800_REGULATOR_OF_MATCH(buck5, BUCK5),
 248        PM800_REGULATOR_OF_MATCH(ldo1, LDO1),
 249        PM800_REGULATOR_OF_MATCH(ldo2, LDO2),
 250        PM800_REGULATOR_OF_MATCH(ldo3, LDO3),
 251        PM800_REGULATOR_OF_MATCH(ldo4, LDO4),
 252        PM800_REGULATOR_OF_MATCH(ldo5, LDO5),
 253        PM800_REGULATOR_OF_MATCH(ldo6, LDO6),
 254        PM800_REGULATOR_OF_MATCH(ldo7, LDO7),
 255        PM800_REGULATOR_OF_MATCH(ldo8, LDO8),
 256        PM800_REGULATOR_OF_MATCH(ldo9, LDO9),
 257        PM800_REGULATOR_OF_MATCH(ldo10, LDO10),
 258        PM800_REGULATOR_OF_MATCH(ldo11, LDO11),
 259        PM800_REGULATOR_OF_MATCH(ldo12, LDO12),
 260        PM800_REGULATOR_OF_MATCH(ldo13, LDO13),
 261        PM800_REGULATOR_OF_MATCH(ldo14, LDO14),
 262        PM800_REGULATOR_OF_MATCH(ldo15, LDO15),
 263        PM800_REGULATOR_OF_MATCH(ldo16, LDO16),
 264        PM800_REGULATOR_OF_MATCH(ldo17, LDO17),
 265        PM800_REGULATOR_OF_MATCH(ldo18, LDO18),
 266        PM800_REGULATOR_OF_MATCH(ldo19, LDO19),
 267};
 268
 269static int pm800_regulator_dt_init(struct platform_device *pdev)
 270{
 271        struct device_node *np = pdev->dev.of_node;
 272        int ret;
 273
 274        ret = of_regulator_match(&pdev->dev, np,
 275                                 pm800_regulator_matches,
 276                                 ARRAY_SIZE(pm800_regulator_matches));
 277        if (ret < 0)
 278                return ret;
 279
 280        return 0;
 281}
 282
 283static int pm800_regulator_probe(struct platform_device *pdev)
 284{
 285        struct pm80x_chip *chip = dev_get_drvdata(pdev->dev.parent);
 286        struct pm80x_platform_data *pdata = dev_get_platdata(pdev->dev.parent);
 287        struct pm800_regulators *pm800_data;
 288        struct pm800_regulator_info *info;
 289        struct regulator_config config = { };
 290        struct regulator_init_data *init_data;
 291        int i, ret;
 292
 293        if (!pdata || pdata->num_regulators == 0) {
 294                if (IS_ENABLED(CONFIG_OF)) {
 295                        ret = pm800_regulator_dt_init(pdev);
 296                        if (ret)
 297                                return ret;
 298                } else {
 299                        return -ENODEV;
 300                }
 301        } else if (pdata->num_regulators) {
 302                unsigned int count = 0;
 303
 304                /* Check whether num_regulator is valid. */
 305                for (i = 0; i < ARRAY_SIZE(pdata->regulators); i++) {
 306                        if (pdata->regulators[i])
 307                                count++;
 308                }
 309                if (count != pdata->num_regulators)
 310                        return -EINVAL;
 311        } else {
 312                return -EINVAL;
 313        }
 314
 315        pm800_data = devm_kzalloc(&pdev->dev, sizeof(*pm800_data),
 316                                        GFP_KERNEL);
 317        if (!pm800_data) {
 318                dev_err(&pdev->dev, "Failed to allocate pm800_regualtors");
 319                return -ENOMEM;
 320        }
 321
 322        pm800_data->map = chip->subchip->regmap_power;
 323        pm800_data->chip = chip;
 324
 325        platform_set_drvdata(pdev, pm800_data);
 326
 327        for (i = 0; i < PM800_ID_RG_MAX; i++) {
 328                if (!pdata || pdata->num_regulators == 0)
 329                        init_data = pm800_regulator_matches[i].init_data;
 330                else
 331                        init_data = pdata->regulators[i];
 332                if (!init_data)
 333                        continue;
 334                info = pm800_regulator_matches[i].driver_data;
 335                config.dev = &pdev->dev;
 336                config.init_data = init_data;
 337                config.driver_data = info;
 338                config.regmap = pm800_data->map;
 339                config.of_node = pm800_regulator_matches[i].of_node;
 340
 341                pm800_data->regulators[i] =
 342                                regulator_register(&info->desc, &config);
 343                if (IS_ERR(pm800_data->regulators[i])) {
 344                        ret = PTR_ERR(pm800_data->regulators[i]);
 345                        dev_err(&pdev->dev, "Failed to register %s\n",
 346                                info->desc.name);
 347
 348                        while (--i >= 0)
 349                                regulator_unregister(pm800_data->regulators[i]);
 350
 351                        return ret;
 352                }
 353        }
 354
 355        return 0;
 356}
 357
 358static int pm800_regulator_remove(struct platform_device *pdev)
 359{
 360        struct pm800_regulators *pm800_data = platform_get_drvdata(pdev);
 361        int i;
 362
 363        for (i = 0; i < PM800_ID_RG_MAX; i++)
 364                regulator_unregister(pm800_data->regulators[i]);
 365
 366        return 0;
 367}
 368
 369static struct platform_driver pm800_regulator_driver = {
 370        .driver         = {
 371                .name   = "88pm80x-regulator",
 372                .owner  = THIS_MODULE,
 373        },
 374        .probe          = pm800_regulator_probe,
 375        .remove         = pm800_regulator_remove,
 376};
 377
 378module_platform_driver(pm800_regulator_driver);
 379
 380MODULE_LICENSE("GPL");
 381MODULE_AUTHOR("Joseph(Yossi) Hanin <yhanin@marvell.com>");
 382MODULE_DESCRIPTION("Regulator Driver for Marvell 88PM800 PMIC");
 383MODULE_ALIAS("platform:88pm800-regulator");
 384
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