linux/drivers/regulator/tps65086-regulator.c
<<
>>
Prefs
   1/*
   2 * Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com/
   3 *
   4 * Author: Andrew F. Davis <afd@ti.com>
   5 *
   6 * This program is free software; you can redistribute it and/or
   7 * modify it under the terms of the GNU General Public License version 2 as
   8 * published by the Free Software Foundation.
   9 *
  10 * This program is distributed "as is" WITHOUT ANY WARRANTY of any
  11 * kind, whether expressed or implied; without even the implied warranty
  12 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 * GNU General Public License version 2 for more details.
  14 *
  15 * Based on the TPS65912 driver
  16 */
  17
  18#include <linux/module.h>
  19#include <linux/of.h>
  20#include <linux/platform_device.h>
  21#include <linux/regulator/driver.h>
  22
  23#include <linux/mfd/tps65086.h>
  24
  25enum tps65086_regulators { BUCK1, BUCK2, BUCK3, BUCK4, BUCK5, BUCK6, LDOA1,
  26        LDOA2, LDOA3, SWA1, SWB1, SWB2, VTT };
  27
  28#define TPS65086_REGULATOR(_name, _of, _id, _nv, _vr, _vm, _er, _em, _lr, _dr, _dm)     \
  29        [_id] = {                                                       \
  30                .desc = {                                               \
  31                        .name                   = _name,                \
  32                        .of_match               = of_match_ptr(_of),    \
  33                        .regulators_node        = "regulators",         \
  34                        .of_parse_cb            = tps65086_of_parse_cb, \
  35                        .id                     = _id,                  \
  36                        .ops                    = &reg_ops,             \
  37                        .n_voltages             = _nv,                  \
  38                        .type                   = REGULATOR_VOLTAGE,    \
  39                        .owner                  = THIS_MODULE,          \
  40                        .vsel_reg               = _vr,                  \
  41                        .vsel_mask              = _vm,                  \
  42                        .enable_reg             = _er,                  \
  43                        .enable_mask            = _em,                  \
  44                        .volt_table             = NULL,                 \
  45                        .linear_ranges          = _lr,                  \
  46                        .n_linear_ranges        = ARRAY_SIZE(_lr),      \
  47                },                                                      \
  48                .decay_reg = _dr,                                       \
  49                .decay_mask = _dm,                                      \
  50        }
  51
  52#define TPS65086_SWITCH(_name, _of, _id, _er, _em)                      \
  53        [_id] = {                                                       \
  54                .desc = {                                               \
  55                        .name                   = _name,                \
  56                        .of_match               = of_match_ptr(_of),    \
  57                        .regulators_node        = "regulators",         \
  58                        .of_parse_cb            = tps65086_of_parse_cb, \
  59                        .id                     = _id,                  \
  60                        .ops                    = &switch_ops,          \
  61                        .type                   = REGULATOR_VOLTAGE,    \
  62                        .owner                  = THIS_MODULE,          \
  63                        .enable_reg             = _er,                  \
  64                        .enable_mask            = _em,                  \
  65                },                                                      \
  66        }
  67
  68struct tps65086_regulator {
  69        struct regulator_desc desc;
  70        unsigned int decay_reg;
  71        unsigned int decay_mask;
  72};
  73
  74static const struct regulator_linear_range tps65086_10mv_ranges[] = {
  75        REGULATOR_LINEAR_RANGE(0, 0x0, 0x0, 0),
  76        REGULATOR_LINEAR_RANGE(410000, 0x1, 0x7F, 10000),
  77};
  78
  79static const struct regulator_linear_range tps65086_buck126_25mv_ranges[] = {
  80        REGULATOR_LINEAR_RANGE(0, 0x0, 0x0, 0),
  81        REGULATOR_LINEAR_RANGE(1000000, 0x1, 0x18, 0),
  82        REGULATOR_LINEAR_RANGE(1025000, 0x19, 0x7F, 25000),
  83};
  84
  85static const struct regulator_linear_range tps65086_buck345_25mv_ranges[] = {
  86        REGULATOR_LINEAR_RANGE(0, 0x0, 0x0, 0),
  87        REGULATOR_LINEAR_RANGE(425000, 0x1, 0x7F, 25000),
  88};
  89
  90static const struct regulator_linear_range tps65086_ldoa1_ranges[] = {
  91        REGULATOR_LINEAR_RANGE(1350000, 0x0, 0x0, 0),
  92        REGULATOR_LINEAR_RANGE(1500000, 0x1, 0x7, 100000),
  93        REGULATOR_LINEAR_RANGE(2300000, 0x8, 0xB, 100000),
  94        REGULATOR_LINEAR_RANGE(2850000, 0xC, 0xD, 150000),
  95        REGULATOR_LINEAR_RANGE(3300000, 0xE, 0xE, 0),
  96};
  97
  98static const struct regulator_linear_range tps65086_ldoa23_ranges[] = {
  99        REGULATOR_LINEAR_RANGE(700000, 0x0, 0xD, 50000),
 100        REGULATOR_LINEAR_RANGE(1400000, 0xE, 0xF, 100000),
 101};
 102
 103/* Operations permitted on regulators */
 104static struct regulator_ops reg_ops = {
 105        .enable                 = regulator_enable_regmap,
 106        .disable                = regulator_disable_regmap,
 107        .is_enabled             = regulator_is_enabled_regmap,
 108        .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 109        .map_voltage            = regulator_map_voltage_linear_range,
 110        .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 111        .list_voltage           = regulator_list_voltage_linear_range,
 112};
 113
 114/* Operations permitted on load switches */
 115static struct regulator_ops switch_ops = {
 116        .enable                 = regulator_enable_regmap,
 117        .disable                = regulator_disable_regmap,
 118        .is_enabled             = regulator_is_enabled_regmap,
 119};
 120
 121static int tps65086_of_parse_cb(struct device_node *dev,
 122                                const struct regulator_desc *desc,
 123                                struct regulator_config *config);
 124
 125static struct tps65086_regulator regulators[] = {
 126        TPS65086_REGULATOR("BUCK1", "buck1", BUCK1, 0x80, TPS65086_BUCK1CTRL,
 127                           BUCK_VID_MASK, TPS65086_BUCK123CTRL, BIT(0),
 128                           tps65086_10mv_ranges, TPS65086_BUCK1CTRL,
 129                           BIT(0)),
 130        TPS65086_REGULATOR("BUCK2", "buck2", BUCK2, 0x80, TPS65086_BUCK2CTRL,
 131                           BUCK_VID_MASK, TPS65086_BUCK123CTRL, BIT(1),
 132                           tps65086_10mv_ranges, TPS65086_BUCK2CTRL,
 133                           BIT(0)),
 134        TPS65086_REGULATOR("BUCK3", "buck3", BUCK3, 0x80, TPS65086_BUCK3VID,
 135                           BUCK_VID_MASK, TPS65086_BUCK123CTRL, BIT(2),
 136                           tps65086_10mv_ranges, TPS65086_BUCK3DECAY,
 137                           BIT(0)),
 138        TPS65086_REGULATOR("BUCK4", "buck4", BUCK4, 0x80, TPS65086_BUCK4VID,
 139                           BUCK_VID_MASK, TPS65086_BUCK4CTRL, BIT(0),
 140                           tps65086_10mv_ranges, TPS65086_BUCK4VID,
 141                           BIT(0)),
 142        TPS65086_REGULATOR("BUCK5", "buck5", BUCK5, 0x80, TPS65086_BUCK5VID,
 143                           BUCK_VID_MASK, TPS65086_BUCK5CTRL, BIT(0),
 144                           tps65086_10mv_ranges, TPS65086_BUCK5CTRL,
 145                           BIT(0)),
 146        TPS65086_REGULATOR("BUCK6", "buck6", BUCK6, 0x80, TPS65086_BUCK6VID,
 147                           BUCK_VID_MASK, TPS65086_BUCK6CTRL, BIT(0),
 148                           tps65086_10mv_ranges, TPS65086_BUCK6CTRL,
 149                           BIT(0)),
 150        TPS65086_REGULATOR("LDOA1", "ldoa1", LDOA1, 0xF, TPS65086_LDOA1CTRL,
 151                           VDOA1_VID_MASK, TPS65086_LDOA1CTRL, BIT(0),
 152                           tps65086_ldoa1_ranges, 0, 0),
 153        TPS65086_REGULATOR("LDOA2", "ldoa2", LDOA2, 0x10, TPS65086_LDOA2VID,
 154                           VDOA23_VID_MASK, TPS65086_LDOA2CTRL, BIT(0),
 155                           tps65086_ldoa23_ranges, 0, 0),
 156        TPS65086_REGULATOR("LDOA3", "ldoa3", LDOA3, 0x10, TPS65086_LDOA3VID,
 157                           VDOA23_VID_MASK, TPS65086_LDOA3CTRL, BIT(0),
 158                           tps65086_ldoa23_ranges, 0, 0),
 159        TPS65086_SWITCH("SWA1", "swa1", SWA1, TPS65086_SWVTT_EN, BIT(5)),
 160        TPS65086_SWITCH("SWB1", "swb1", SWB1, TPS65086_SWVTT_EN, BIT(6)),
 161        TPS65086_SWITCH("SWB2", "swb2", SWB2, TPS65086_SWVTT_EN, BIT(7)),
 162        TPS65086_SWITCH("VTT", "vtt", VTT, TPS65086_SWVTT_EN, BIT(4)),
 163};
 164
 165static int tps65086_of_parse_cb(struct device_node *node,
 166                                const struct regulator_desc *desc,
 167                                struct regulator_config *config)
 168{
 169        int ret;
 170
 171        /* Check for 25mV step mode */
 172        if (of_property_read_bool(node, "ti,regulator-step-size-25mv")) {
 173                switch (desc->id) {
 174                case BUCK1:
 175                case BUCK2:
 176                case BUCK6:
 177                        regulators[desc->id].desc.linear_ranges =
 178                                tps65086_buck126_25mv_ranges;
 179                        regulators[desc->id].desc.n_linear_ranges =
 180                                ARRAY_SIZE(tps65086_buck126_25mv_ranges);
 181                        break;
 182                case BUCK3:
 183                case BUCK4:
 184                case BUCK5:
 185                        regulators[desc->id].desc.linear_ranges =
 186                                tps65086_buck345_25mv_ranges;
 187                        regulators[desc->id].desc.n_linear_ranges =
 188                                ARRAY_SIZE(tps65086_buck345_25mv_ranges);
 189                        break;
 190                default:
 191                        dev_warn(config->dev, "25mV step mode only valid for BUCK regulators\n");
 192                }
 193        }
 194
 195        /* Check for decay mode */
 196        if (desc->id <= BUCK6 && of_property_read_bool(node, "ti,regulator-decay")) {
 197                ret = regmap_write_bits(config->regmap,
 198                                        regulators[desc->id].decay_reg,
 199                                        regulators[desc->id].decay_mask,
 200                                        regulators[desc->id].decay_mask);
 201                if (ret) {
 202                        dev_err(config->dev, "Error setting decay\n");
 203                        return ret;
 204                }
 205        }
 206
 207        return 0;
 208}
 209
 210static int tps65086_regulator_probe(struct platform_device *pdev)
 211{
 212        struct tps65086 *tps = dev_get_drvdata(pdev->dev.parent);
 213        struct regulator_config config = { };
 214        struct regulator_dev *rdev;
 215        int i;
 216
 217        platform_set_drvdata(pdev, tps);
 218
 219        config.dev = &pdev->dev;
 220        config.dev->of_node = tps->dev->of_node;
 221        config.driver_data = tps;
 222        config.regmap = tps->regmap;
 223
 224        for (i = 0; i < ARRAY_SIZE(regulators); i++) {
 225                rdev = devm_regulator_register(&pdev->dev, &regulators[i].desc,
 226                                               &config);
 227                if (IS_ERR(rdev)) {
 228                        dev_err(tps->dev, "failed to register %s regulator\n",
 229                                pdev->name);
 230                        return PTR_ERR(rdev);
 231                }
 232        }
 233
 234        return 0;
 235}
 236
 237static const struct platform_device_id tps65086_regulator_id_table[] = {
 238        { "tps65086-regulator", },
 239        { /* sentinel */ }
 240};
 241MODULE_DEVICE_TABLE(platform, tps65086_regulator_id_table);
 242
 243static struct platform_driver tps65086_regulator_driver = {
 244        .driver = {
 245                .name = "tps65086-regulator",
 246        },
 247        .probe = tps65086_regulator_probe,
 248        .id_table = tps65086_regulator_id_table,
 249};
 250module_platform_driver(tps65086_regulator_driver);
 251
 252MODULE_AUTHOR("Andrew F. Davis <afd@ti.com>");
 253MODULE_DESCRIPTION("TPS65086 Regulator driver");
 254MODULE_LICENSE("GPL v2");
 255