linux/drivers/regulator/tps65218-regulator.c
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   1/*
   2 * tps65218-regulator.c
   3 *
   4 * Regulator driver for TPS65218 PMIC
   5 *
   6 * Copyright (C) 2014 Texas Instruments 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 version 2 as
  10 * published by the Free Software Foundation.
  11 *
  12 * This program is distributed "as is" WITHOUT ANY WARRANTY of any
  13 * kind, whether expressed or implied; without even the implied warranty
  14 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 * GNU General Public License version 2 for more details.
  16 */
  17
  18#include <linux/kernel.h>
  19#include <linux/module.h>
  20#include <linux/device.h>
  21#include <linux/init.h>
  22#include <linux/err.h>
  23#include <linux/platform_device.h>
  24#include <linux/of_device.h>
  25#include <linux/regulator/of_regulator.h>
  26#include <linux/regulator/driver.h>
  27#include <linux/regulator/machine.h>
  28#include <linux/mfd/tps65218.h>
  29
  30enum tps65218_regulators { DCDC1, DCDC2, DCDC3, DCDC4, DCDC5, DCDC6, LDO1 };
  31
  32#define TPS65218_REGULATOR(_name, _id, _ops, _n, _vr, _vm, _er, _em, \
  33                            _lr, _nlr, _delay, _fuv)            \
  34        {                                                       \
  35                .name                   = _name,                \
  36                .id                     = _id,                  \
  37                .ops                    = &_ops,                \
  38                .n_voltages             = _n,                   \
  39                .type                   = REGULATOR_VOLTAGE,    \
  40                .owner                  = THIS_MODULE,          \
  41                .vsel_reg               = _vr,                  \
  42                .vsel_mask              = _vm,                  \
  43                .enable_reg             = _er,                  \
  44                .enable_mask            = _em,                  \
  45                .volt_table             = NULL,                 \
  46                .linear_ranges          = _lr,                  \
  47                .n_linear_ranges        = _nlr,                 \
  48                .ramp_delay             = _delay,               \
  49                .fixed_uV               = _fuv                  \
  50        }                                                       \
  51
  52#define TPS65218_INFO(_id, _nm, _min, _max)     \
  53        [_id] = {                                       \
  54                .id             = _id,                  \
  55                .name           = _nm,                  \
  56                .min_uV         = _min,                 \
  57                .max_uV         = _max,                 \
  58        }
  59
  60static const struct regulator_linear_range dcdc1_dcdc2_ranges[] = {
  61        REGULATOR_LINEAR_RANGE(850000, 0x0, 0x32, 10000),
  62        REGULATOR_LINEAR_RANGE(1375000, 0x33, 0x3f, 25000),
  63};
  64
  65static const struct regulator_linear_range ldo1_dcdc3_ranges[] = {
  66        REGULATOR_LINEAR_RANGE(900000, 0x0, 0x1a, 25000),
  67        REGULATOR_LINEAR_RANGE(1600000, 0x1b, 0x3f, 50000),
  68};
  69
  70static const struct regulator_linear_range dcdc4_ranges[] = {
  71        REGULATOR_LINEAR_RANGE(1175000, 0x0, 0xf, 25000),
  72        REGULATOR_LINEAR_RANGE(1600000, 0x10, 0x34, 50000),
  73};
  74
  75static struct tps_info tps65218_pmic_regs[] = {
  76        TPS65218_INFO(DCDC1, "DCDC1", 850000, 167500),
  77        TPS65218_INFO(DCDC2, "DCDC2", 850000, 1675000),
  78        TPS65218_INFO(DCDC3, "DCDC3", 900000, 3400000),
  79        TPS65218_INFO(DCDC4, "DCDC4", 1175000, 3400000),
  80        TPS65218_INFO(DCDC5, "DCDC5", 1000000, 1000000),
  81        TPS65218_INFO(DCDC6, "DCDC6", 1800000, 1800000),
  82        TPS65218_INFO(LDO1, "LDO1", 900000, 3400000),
  83};
  84
  85#define TPS65218_OF_MATCH(comp, label) \
  86        { \
  87                .compatible = comp, \
  88                .data = &label, \
  89        }
  90
  91static const struct of_device_id tps65218_of_match[] = {
  92        TPS65218_OF_MATCH("ti,tps65218-dcdc1", tps65218_pmic_regs[DCDC1]),
  93        TPS65218_OF_MATCH("ti,tps65218-dcdc2", tps65218_pmic_regs[DCDC2]),
  94        TPS65218_OF_MATCH("ti,tps65218-dcdc3", tps65218_pmic_regs[DCDC3]),
  95        TPS65218_OF_MATCH("ti,tps65218-dcdc4", tps65218_pmic_regs[DCDC4]),
  96        TPS65218_OF_MATCH("ti,tps65218-dcdc5", tps65218_pmic_regs[DCDC5]),
  97        TPS65218_OF_MATCH("ti,tps65218-dcdc6", tps65218_pmic_regs[DCDC6]),
  98        TPS65218_OF_MATCH("ti,tps65218-ldo1", tps65218_pmic_regs[LDO1]),
  99        { }
 100};
 101MODULE_DEVICE_TABLE(of, tps65218_of_match);
 102
 103static int tps65218_pmic_set_voltage_sel(struct regulator_dev *dev,
 104                                         unsigned selector)
 105{
 106        int ret;
 107        struct tps65218 *tps = rdev_get_drvdata(dev);
 108        unsigned int rid = rdev_get_id(dev);
 109
 110        /* Set the voltage based on vsel value and write protect level is 2 */
 111        ret = tps65218_set_bits(tps, dev->desc->vsel_reg, dev->desc->vsel_mask,
 112                                selector, TPS65218_PROTECT_L1);
 113
 114        /* Set GO bit for DCDC1/2 to initiate voltage transistion */
 115        switch (rid) {
 116        case TPS65218_DCDC_1:
 117        case TPS65218_DCDC_2:
 118                ret = tps65218_set_bits(tps, TPS65218_REG_CONTRL_SLEW_RATE,
 119                                        TPS65218_SLEW_RATE_GO,
 120                                        TPS65218_SLEW_RATE_GO,
 121                                        TPS65218_PROTECT_L1);
 122                break;
 123        }
 124
 125        return ret;
 126}
 127
 128static int tps65218_pmic_enable(struct regulator_dev *dev)
 129{
 130        struct tps65218 *tps = rdev_get_drvdata(dev);
 131        int rid = rdev_get_id(dev);
 132
 133        if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1)
 134                return -EINVAL;
 135
 136        /* Enable the regulator and password protection is level 1 */
 137        return tps65218_set_bits(tps, dev->desc->enable_reg,
 138                                 dev->desc->enable_mask, dev->desc->enable_mask,
 139                                 TPS65218_PROTECT_L1);
 140}
 141
 142static int tps65218_pmic_disable(struct regulator_dev *dev)
 143{
 144        struct tps65218 *tps = rdev_get_drvdata(dev);
 145        int rid = rdev_get_id(dev);
 146
 147        if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1)
 148                return -EINVAL;
 149
 150        /* Disable the regulator and password protection is level 1 */
 151        return tps65218_clear_bits(tps, dev->desc->enable_reg,
 152                                   dev->desc->enable_mask, TPS65218_PROTECT_L1);
 153}
 154
 155/* Operations permitted on DCDC1, DCDC2 */
 156static struct regulator_ops tps65218_dcdc12_ops = {
 157        .is_enabled             = regulator_is_enabled_regmap,
 158        .enable                 = tps65218_pmic_enable,
 159        .disable                = tps65218_pmic_disable,
 160        .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 161        .set_voltage_sel        = tps65218_pmic_set_voltage_sel,
 162        .list_voltage           = regulator_list_voltage_linear_range,
 163        .map_voltage            = regulator_map_voltage_linear_range,
 164        .set_voltage_time_sel   = regulator_set_voltage_time_sel,
 165};
 166
 167/* Operations permitted on DCDC3, DCDC4 and LDO1 */
 168static struct regulator_ops tps65218_ldo1_dcdc34_ops = {
 169        .is_enabled             = regulator_is_enabled_regmap,
 170        .enable                 = tps65218_pmic_enable,
 171        .disable                = tps65218_pmic_disable,
 172        .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 173        .set_voltage_sel        = tps65218_pmic_set_voltage_sel,
 174        .list_voltage           = regulator_list_voltage_linear_range,
 175        .map_voltage            = regulator_map_voltage_linear_range,
 176};
 177
 178/* Operations permitted on DCDC5, DCDC6 */
 179static struct regulator_ops tps65218_dcdc56_pmic_ops = {
 180        .is_enabled             = regulator_is_enabled_regmap,
 181        .enable                 = tps65218_pmic_enable,
 182        .disable                = tps65218_pmic_disable,
 183};
 184
 185static const struct regulator_desc regulators[] = {
 186        TPS65218_REGULATOR("DCDC1", TPS65218_DCDC_1, tps65218_dcdc12_ops, 64,
 187                           TPS65218_REG_CONTROL_DCDC1,
 188                           TPS65218_CONTROL_DCDC1_MASK,
 189                           TPS65218_REG_ENABLE1, TPS65218_ENABLE1_DC1_EN,
 190                           dcdc1_dcdc2_ranges, 2, 4000, 0),
 191        TPS65218_REGULATOR("DCDC2", TPS65218_DCDC_2, tps65218_dcdc12_ops, 64,
 192                           TPS65218_REG_CONTROL_DCDC2,
 193                           TPS65218_CONTROL_DCDC2_MASK,
 194                           TPS65218_REG_ENABLE1, TPS65218_ENABLE1_DC2_EN,
 195                           dcdc1_dcdc2_ranges, 2, 4000, 0),
 196        TPS65218_REGULATOR("DCDC3", TPS65218_DCDC_3, tps65218_ldo1_dcdc34_ops,
 197                           64, TPS65218_REG_CONTROL_DCDC3,
 198                           TPS65218_CONTROL_DCDC3_MASK, TPS65218_REG_ENABLE1,
 199                           TPS65218_ENABLE1_DC3_EN, ldo1_dcdc3_ranges, 2, 0, 0),
 200        TPS65218_REGULATOR("DCDC4", TPS65218_DCDC_4, tps65218_ldo1_dcdc34_ops,
 201                           53, TPS65218_REG_CONTROL_DCDC4,
 202                           TPS65218_CONTROL_DCDC4_MASK,
 203                           TPS65218_REG_ENABLE1, TPS65218_ENABLE1_DC4_EN,
 204                           dcdc4_ranges, 2, 0, 0),
 205        TPS65218_REGULATOR("DCDC5", TPS65218_DCDC_5, tps65218_dcdc56_pmic_ops,
 206                           1, -1, -1, TPS65218_REG_ENABLE1,
 207                           TPS65218_ENABLE1_DC5_EN, NULL, 0, 0, 1000000),
 208        TPS65218_REGULATOR("DCDC6", TPS65218_DCDC_6, tps65218_dcdc56_pmic_ops,
 209                           1, -1, -1, TPS65218_REG_ENABLE1,
 210                           TPS65218_ENABLE1_DC6_EN, NULL, 0, 0, 1800000),
 211        TPS65218_REGULATOR("LDO1", TPS65218_LDO_1, tps65218_ldo1_dcdc34_ops, 64,
 212                           TPS65218_REG_CONTROL_LDO1,
 213                           TPS65218_CONTROL_LDO1_MASK, TPS65218_REG_ENABLE2,
 214                           TPS65218_ENABLE2_LDO1_EN, ldo1_dcdc3_ranges,
 215                           2, 0, 0),
 216};
 217
 218static int tps65218_regulator_probe(struct platform_device *pdev)
 219{
 220        struct tps65218 *tps = dev_get_drvdata(pdev->dev.parent);
 221        struct regulator_init_data *init_data;
 222        const struct tps_info   *template;
 223        struct regulator_dev *rdev;
 224        const struct of_device_id       *match;
 225        struct regulator_config config = { };
 226        int id;
 227
 228        match = of_match_device(tps65218_of_match, &pdev->dev);
 229        if (!match)
 230                return -ENODEV;
 231
 232        template = match->data;
 233        id = template->id;
 234        init_data = of_get_regulator_init_data(&pdev->dev, pdev->dev.of_node,
 235                                               &regulators[id]);
 236
 237        platform_set_drvdata(pdev, tps);
 238
 239        tps->info[id] = &tps65218_pmic_regs[id];
 240        config.dev = &pdev->dev;
 241        config.init_data = init_data;
 242        config.driver_data = tps;
 243        config.regmap = tps->regmap;
 244        config.of_node = pdev->dev.of_node;
 245
 246        rdev = devm_regulator_register(&pdev->dev, &regulators[id], &config);
 247        if (IS_ERR(rdev)) {
 248                dev_err(tps->dev, "failed to register %s regulator\n",
 249                        pdev->name);
 250                return PTR_ERR(rdev);
 251        }
 252
 253        return 0;
 254}
 255
 256static struct platform_driver tps65218_regulator_driver = {
 257        .driver = {
 258                .name = "tps65218-pmic",
 259                .of_match_table = tps65218_of_match,
 260        },
 261        .probe = tps65218_regulator_probe,
 262};
 263
 264module_platform_driver(tps65218_regulator_driver);
 265
 266MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>");
 267MODULE_DESCRIPTION("TPS65218 voltage regulator driver");
 268MODULE_ALIAS("platform:tps65218-pmic");
 269MODULE_LICENSE("GPL v2");
 270
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