drivers/regulator/tps65086-regulator.c

   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
  25 enum 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
  68 struct tps65086_regulator {
  69         struct regulator_desc desc;
  70         unsigned int decay_reg;
  71         unsigned int decay_mask;
  72 };
  73
  74 static const struct regulator_linear_range tps65086_buck126_10mv_ranges[] = {
  75         REGULATOR_LINEAR_RANGE(0, 0x0, 0x0, 0),
  76         REGULATOR_LINEAR_RANGE(410000, 0x1, 0x7F, 10000),
  77 };
  78
  79 static 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
  85 static const struct regulator_linear_range tps65086_buck345_ranges[] = {
  86         REGULATOR_LINEAR_RANGE(0, 0x0, 0x0, 0),
  87         REGULATOR_LINEAR_RANGE(425000, 0x1, 0x7F, 25000),
  88 };
  89
  90 static 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, 0xA, 100000),
  94         REGULATOR_LINEAR_RANGE(2700000, 0xB, 0xD, 150000),
  95         REGULATOR_LINEAR_RANGE(3300000, 0xE, 0xE, 0),
  96 };
  97
  98 static 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 */
 104 static 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 */
 115 static struct regulator_ops switch_ops = {
 116         .enable                 = regulator_enable_regmap,
 117         .disable                = regulator_disable_regmap,
 118         .is_enabled             = regulator_is_enabled_regmap,
 119 };
 120
 121 static int tps65086_of_parse_cb(struct device_node *dev,
 122                                 const struct regulator_desc *desc,
 123                                 struct regulator_config *config);
 124
 125 static struct tps65086_regulator regulators[] = {
 126         TPS65086_REGULATOR("BUCK1", "buck1", BUCK1, 0x80, TPS65086_BUCK1CTRL,
 127                            BUCK_VID_MASK, TPS65086_BUCK123CTRL, BIT(0),
 128                            tps65086_buck126_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_buck126_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_buck345_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_buck345_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_buck345_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_buck126_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", "swa2", SWB1, TPS65086_SWVTT_EN, BIT(6)),
 161         TPS65086_SWITCH("SWB2", "swa3", SWB2, TPS65086_SWVTT_EN, BIT(7)),
 162         TPS65086_SWITCH("VTT", "vtt", VTT, TPS65086_SWVTT_EN, BIT(4)),
 163 };
 164
 165 static inline bool has_25mv_mode(int id)
 166 {
 167         switch (id) {
 168         case BUCK1:
 169         case BUCK2:
 170         case BUCK6:
 171                 return true;
 172         default:
 173                 return false;
 174         }
 175 }
 176
 177 static int tps65086_of_parse_cb(struct device_node *dev,
 178                                 const struct regulator_desc *desc,
 179                                 struct regulator_config *config)
 180 {
 181         int ret;
 182
 183         /* Check for 25mV step mode */
 184         if (has_25mv_mode(desc->id) &&
 185                         of_property_read_bool(config->of_node, "ti,regulator-step-size-25mv")) {
 186                 regulators[desc->id].desc.linear_ranges =
 187                                 tps65086_buck126_25mv_ranges;
 188                 regulators[desc->id].desc.n_linear_ranges =
 189                                 ARRAY_SIZE(tps65086_buck126_25mv_ranges);
 190         }
 191
 192         /* Check for decay mode */
 193         if (desc->id <= BUCK6 && of_property_read_bool(config->of_node, "ti,regulator-decay")) {
 194                 ret = regmap_write_bits(config->regmap,
 195                                         regulators[desc->id].decay_reg,
 196                                         regulators[desc->id].decay_mask,
 197                                         regulators[desc->id].decay_mask);
 198                 if (ret) {
 199                         dev_err(config->dev, "Error setting decay\n");
 200                         return ret;
 201                 }
 202         }
 203
 204         return 0;
 205 }
 206
 207 static int tps65086_regulator_probe(struct platform_device *pdev)
 208 {
 209         struct tps65086 *tps = dev_get_drvdata(pdev->dev.parent);
 210         struct regulator_config config = { };
 211         struct regulator_dev *rdev;
 212         int i;
 213
 214         platform_set_drvdata(pdev, tps);
 215
 216         config.dev = &pdev->dev;
 217         config.dev->of_node = tps->dev->of_node;
 218         config.driver_data = tps;
 219         config.regmap = tps->regmap;
 220
 221         for (i = 0; i < ARRAY_SIZE(regulators); i++) {
 222                 rdev = devm_regulator_register(&pdev->dev, &regulators[i].desc,
 223                                                &config);
 224                 if (IS_ERR(rdev)) {
 225                         dev_err(tps->dev, "failed to register %s regulator\n",
 226                                 pdev->name);
 227                         return PTR_ERR(rdev);
 228                 }
 229         }
 230
 231         return 0;
 232 }
 233
 234 static const struct platform_device_id tps65086_regulator_id_table[] = {
 235         { "tps65086-regulator", },
 236         { /* sentinel */ }
 237 };
 238 MODULE_DEVICE_TABLE(platform, tps65086_regulator_id_table);
 239
 240 static struct platform_driver tps65086_regulator_driver = {
 241         .driver = {
 242                 .name = "tps65086-regulator",
 243         },
 244         .probe = tps65086_regulator_probe,
 245         .id_table = tps65086_regulator_id_table,
 246 };
 247 module_platform_driver(tps65086_regulator_driver);
 248
 249 MODULE_AUTHOR("Andrew F. Davis <afd@ti.com>");
 250 MODULE_DESCRIPTION("TPS65086 Regulator driver");
 251 MODULE_LICENSE("GPL v2");