linux/drivers/regulator/tps65217-regulator.c
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   1/*
   2 * tps65217-regulator.c
   3 *
   4 * Regulator driver for TPS65217 PMIC
   5 *
   6 * Copyright (C) 2011 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 as
  10 * published by the Free Software Foundation version 2.
  11 *
  12 * This program is distributed "as is" WITHOUT ANY WARRANTY of any
  13 * kind, whether express or implied; without even the implied warranty
  14 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 * GNU General Public License 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
  25#include <linux/regulator/of_regulator.h>
  26#include <linux/regulator/driver.h>
  27#include <linux/regulator/machine.h>
  28#include <linux/mfd/tps65217.h>
  29
  30#define TPS65217_REGULATOR(_name, _id, _of_match, _ops, _n, _vr, _vm, _em, \
  31                           _t, _lr, _nlr,  _sr, _sm)    \
  32        {                                               \
  33                .name           = _name,                \
  34                .id             = _id,                  \
  35                .of_match       = of_match_ptr(_of_match),    \
  36                .regulators_node= of_match_ptr("regulators"), \
  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     = TPS65217_REG_ENABLE,  \
  44                .enable_mask    = _em,                  \
  45                .volt_table     = _t,                   \
  46                .linear_ranges  = _lr,                  \
  47                .n_linear_ranges = _nlr,                \
  48                .bypass_reg     = _sr,                  \
  49                .bypass_mask    = _sm,                  \
  50        }                                               \
  51
  52static const unsigned int LDO1_VSEL_table[] = {
  53        1000000, 1100000, 1200000, 1250000,
  54        1300000, 1350000, 1400000, 1500000,
  55        1600000, 1800000, 2500000, 2750000,
  56        2800000, 3000000, 3100000, 3300000,
  57};
  58
  59static const struct regulator_linear_range tps65217_uv1_ranges[] = {
  60        REGULATOR_LINEAR_RANGE(900000, 0, 24, 25000),
  61        REGULATOR_LINEAR_RANGE(1550000, 25, 30, 50000),
  62        REGULATOR_LINEAR_RANGE(1850000, 31, 52, 50000),
  63        REGULATOR_LINEAR_RANGE(3000000, 53, 55, 100000),
  64        REGULATOR_LINEAR_RANGE(3300000, 56, 62, 0),
  65};
  66
  67static const struct regulator_linear_range tps65217_uv2_ranges[] = {
  68        REGULATOR_LINEAR_RANGE(1500000, 0, 8, 50000),
  69        REGULATOR_LINEAR_RANGE(2000000, 9, 13, 100000),
  70        REGULATOR_LINEAR_RANGE(2450000, 14, 31, 50000),
  71};
  72
  73static int tps65217_pmic_enable(struct regulator_dev *dev)
  74{
  75        struct tps65217 *tps = rdev_get_drvdata(dev);
  76        int rid = rdev_get_id(dev);
  77
  78        if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4)
  79                return -EINVAL;
  80
  81        /* Enable the regulator and password protection is level 1 */
  82        return tps65217_set_bits(tps, TPS65217_REG_ENABLE,
  83                                 dev->desc->enable_mask, dev->desc->enable_mask,
  84                                 TPS65217_PROTECT_L1);
  85}
  86
  87static int tps65217_pmic_disable(struct regulator_dev *dev)
  88{
  89        struct tps65217 *tps = rdev_get_drvdata(dev);
  90        int rid = rdev_get_id(dev);
  91
  92        if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4)
  93                return -EINVAL;
  94
  95        /* Disable the regulator and password protection is level 1 */
  96        return tps65217_clear_bits(tps, TPS65217_REG_ENABLE,
  97                                   dev->desc->enable_mask, TPS65217_PROTECT_L1);
  98}
  99
 100static int tps65217_pmic_set_voltage_sel(struct regulator_dev *dev,
 101                                         unsigned selector)
 102{
 103        int ret;
 104        struct tps65217 *tps = rdev_get_drvdata(dev);
 105        unsigned int rid = rdev_get_id(dev);
 106
 107        /* Set the voltage based on vsel value and write protect level is 2 */
 108        ret = tps65217_set_bits(tps, dev->desc->vsel_reg, dev->desc->vsel_mask,
 109                                selector, TPS65217_PROTECT_L2);
 110
 111        /* Set GO bit for DCDCx to initiate voltage transistion */
 112        switch (rid) {
 113        case TPS65217_DCDC_1 ... TPS65217_DCDC_3:
 114                ret = tps65217_set_bits(tps, TPS65217_REG_DEFSLEW,
 115                                       TPS65217_DEFSLEW_GO, TPS65217_DEFSLEW_GO,
 116                                       TPS65217_PROTECT_L2);
 117                break;
 118        }
 119
 120        return ret;
 121}
 122
 123static int tps65217_pmic_set_suspend_enable(struct regulator_dev *dev)
 124{
 125        struct tps65217 *tps = rdev_get_drvdata(dev);
 126        unsigned int rid = rdev_get_id(dev);
 127
 128        if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4)
 129                return -EINVAL;
 130
 131        return tps65217_clear_bits(tps, dev->desc->bypass_reg,
 132                                   dev->desc->bypass_mask,
 133                                   TPS65217_PROTECT_L1);
 134}
 135
 136static int tps65217_pmic_set_suspend_disable(struct regulator_dev *dev)
 137{
 138        struct tps65217 *tps = rdev_get_drvdata(dev);
 139        unsigned int rid = rdev_get_id(dev);
 140
 141        if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4)
 142                return -EINVAL;
 143
 144        if (!tps->strobes[rid])
 145                return -EINVAL;
 146
 147        return tps65217_set_bits(tps, dev->desc->bypass_reg,
 148                                 dev->desc->bypass_mask,
 149                                 tps->strobes[rid], TPS65217_PROTECT_L1);
 150}
 151
 152/* Operations permitted on DCDCx, LDO2, LDO3 and LDO4 */
 153static struct regulator_ops tps65217_pmic_ops = {
 154        .is_enabled             = regulator_is_enabled_regmap,
 155        .enable                 = tps65217_pmic_enable,
 156        .disable                = tps65217_pmic_disable,
 157        .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 158        .set_voltage_sel        = tps65217_pmic_set_voltage_sel,
 159        .list_voltage           = regulator_list_voltage_linear_range,
 160        .map_voltage            = regulator_map_voltage_linear_range,
 161        .set_suspend_enable     = tps65217_pmic_set_suspend_enable,
 162        .set_suspend_disable    = tps65217_pmic_set_suspend_disable,
 163};
 164
 165/* Operations permitted on LDO1 */
 166static struct regulator_ops tps65217_pmic_ldo1_ops = {
 167        .is_enabled             = regulator_is_enabled_regmap,
 168        .enable                 = tps65217_pmic_enable,
 169        .disable                = tps65217_pmic_disable,
 170        .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 171        .set_voltage_sel        = tps65217_pmic_set_voltage_sel,
 172        .list_voltage           = regulator_list_voltage_table,
 173        .map_voltage            = regulator_map_voltage_ascend,
 174        .set_suspend_enable     = tps65217_pmic_set_suspend_enable,
 175        .set_suspend_disable    = tps65217_pmic_set_suspend_disable,
 176};
 177
 178static const struct regulator_desc regulators[] = {
 179        TPS65217_REGULATOR("DCDC1", TPS65217_DCDC_1, "dcdc1",
 180                           tps65217_pmic_ops, 64, TPS65217_REG_DEFDCDC1,
 181                           TPS65217_DEFDCDCX_DCDC_MASK, TPS65217_ENABLE_DC1_EN,
 182                           NULL, tps65217_uv1_ranges,
 183                           ARRAY_SIZE(tps65217_uv1_ranges), TPS65217_REG_SEQ1,
 184                           TPS65217_SEQ1_DC1_SEQ_MASK),
 185        TPS65217_REGULATOR("DCDC2", TPS65217_DCDC_2, "dcdc2",
 186                           tps65217_pmic_ops, 64, TPS65217_REG_DEFDCDC2,
 187                           TPS65217_DEFDCDCX_DCDC_MASK, TPS65217_ENABLE_DC2_EN,
 188                           NULL, tps65217_uv1_ranges,
 189                           ARRAY_SIZE(tps65217_uv1_ranges), TPS65217_REG_SEQ1,
 190                           TPS65217_SEQ1_DC2_SEQ_MASK),
 191        TPS65217_REGULATOR("DCDC3", TPS65217_DCDC_3, "dcdc3",
 192                           tps65217_pmic_ops, 64, TPS65217_REG_DEFDCDC3,
 193                           TPS65217_DEFDCDCX_DCDC_MASK, TPS65217_ENABLE_DC3_EN,
 194                           NULL, tps65217_uv1_ranges,
 195                           ARRAY_SIZE(tps65217_uv1_ranges), TPS65217_REG_SEQ2,
 196                           TPS65217_SEQ2_DC3_SEQ_MASK),
 197        TPS65217_REGULATOR("LDO1", TPS65217_LDO_1, "ldo1",
 198                           tps65217_pmic_ldo1_ops, 16, TPS65217_REG_DEFLDO1,
 199                           TPS65217_DEFLDO1_LDO1_MASK, TPS65217_ENABLE_LDO1_EN,
 200                           LDO1_VSEL_table, NULL, 0, TPS65217_REG_SEQ2,
 201                           TPS65217_SEQ2_LDO1_SEQ_MASK),
 202        TPS65217_REGULATOR("LDO2", TPS65217_LDO_2, "ldo2", tps65217_pmic_ops,
 203                           64, TPS65217_REG_DEFLDO2,
 204                           TPS65217_DEFLDO2_LDO2_MASK, TPS65217_ENABLE_LDO2_EN,
 205                           NULL, tps65217_uv1_ranges,
 206                           ARRAY_SIZE(tps65217_uv1_ranges), TPS65217_REG_SEQ3,
 207                           TPS65217_SEQ3_LDO2_SEQ_MASK),
 208        TPS65217_REGULATOR("LDO3", TPS65217_LDO_3, "ldo3", tps65217_pmic_ops,
 209                           32, TPS65217_REG_DEFLS1, TPS65217_DEFLDO3_LDO3_MASK,
 210                           TPS65217_ENABLE_LS1_EN | TPS65217_DEFLDO3_LDO3_EN,
 211                           NULL, tps65217_uv2_ranges,
 212                           ARRAY_SIZE(tps65217_uv2_ranges), TPS65217_REG_SEQ3,
 213                           TPS65217_SEQ3_LDO3_SEQ_MASK),
 214        TPS65217_REGULATOR("LDO4", TPS65217_LDO_4, "ldo4", tps65217_pmic_ops,
 215                           32, TPS65217_REG_DEFLS2, TPS65217_DEFLDO4_LDO4_MASK,
 216                           TPS65217_ENABLE_LS2_EN | TPS65217_DEFLDO4_LDO4_EN,
 217                           NULL, tps65217_uv2_ranges,
 218                           ARRAY_SIZE(tps65217_uv2_ranges), TPS65217_REG_SEQ4,
 219                           TPS65217_SEQ4_LDO4_SEQ_MASK),
 220};
 221
 222static int tps65217_regulator_probe(struct platform_device *pdev)
 223{
 224        struct tps65217 *tps = dev_get_drvdata(pdev->dev.parent);
 225        struct tps65217_board *pdata = dev_get_platdata(tps->dev);
 226        struct regulator_dev *rdev;
 227        struct regulator_config config = { };
 228        int i, ret;
 229        unsigned int val;
 230
 231        /* Allocate memory for strobes */
 232        tps->strobes = devm_kcalloc(&pdev->dev,
 233                                    TPS65217_NUM_REGULATOR, sizeof(u8),
 234                                    GFP_KERNEL);
 235        if (!tps->strobes)
 236                return -ENOMEM;
 237
 238        platform_set_drvdata(pdev, tps);
 239
 240        for (i = 0; i < TPS65217_NUM_REGULATOR; i++) {
 241                /* Register the regulators */
 242                config.dev = tps->dev;
 243                if (pdata)
 244                        config.init_data = pdata->tps65217_init_data[i];
 245                config.driver_data = tps;
 246                config.regmap = tps->regmap;
 247
 248                rdev = devm_regulator_register(&pdev->dev, &regulators[i],
 249                                               &config);
 250                if (IS_ERR(rdev)) {
 251                        dev_err(tps->dev, "failed to register %s regulator\n",
 252                                pdev->name);
 253                        return PTR_ERR(rdev);
 254                }
 255
 256                /* Store default strobe info */
 257                ret = tps65217_reg_read(tps, regulators[i].bypass_reg, &val);
 258                tps->strobes[i] = val & regulators[i].bypass_mask;
 259        }
 260
 261        return 0;
 262}
 263
 264static struct platform_driver tps65217_regulator_driver = {
 265        .driver = {
 266                .name = "tps65217-pmic",
 267        },
 268        .probe = tps65217_regulator_probe,
 269};
 270
 271static int __init tps65217_regulator_init(void)
 272{
 273        return platform_driver_register(&tps65217_regulator_driver);
 274}
 275subsys_initcall(tps65217_regulator_init);
 276
 277static void __exit tps65217_regulator_exit(void)
 278{
 279        platform_driver_unregister(&tps65217_regulator_driver);
 280}
 281module_exit(tps65217_regulator_exit);
 282
 283MODULE_AUTHOR("AnilKumar Ch <anilkumar@ti.com>");
 284MODULE_DESCRIPTION("TPS65217 voltage regulator driver");
 285MODULE_ALIAS("platform:tps65217-pmic");
 286MODULE_LICENSE("GPL v2");
 287