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_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(1000000, 0x0, 0x18, 0),
  81         REGULATOR_LINEAR_RANGE(1025000, 0x19, 0x7F, 25000),
  82 };
  83
  84 static const struct regulator_linear_range tps65086_buck345_25mv_ranges[] = {
  85         REGULATOR_LINEAR_RANGE(0, 0x0, 0x0, 0),
  86         REGULATOR_LINEAR_RANGE(425000, 0x1, 0x7F, 25000),
  87 };
  88
  89 static const struct regulator_linear_range tps65086_ldoa1_ranges[] = {
  90         REGULATOR_LINEAR_RANGE(1350000, 0x0, 0x0, 0),
  91         REGULATOR_LINEAR_RANGE(1500000, 0x1, 0x7, 100000),
  92         REGULATOR_LINEAR_RANGE(2300000, 0x8, 0xB, 100000),
  93         REGULATOR_LINEAR_RANGE(2850000, 0xC, 0xD, 150000),
  94         REGULATOR_LINEAR_RANGE(3300000, 0xE, 0xE, 0),
  95 };
  96
  97 static const struct regulator_linear_range tps65086_ldoa23_ranges[] = {
  98         REGULATOR_LINEAR_RANGE(700000, 0x0, 0xD, 50000),
  99         REGULATOR_LINEAR_RANGE(1400000, 0xE, 0xF, 100000),
 100 };
 101
 102 /* Operations permitted on regulators */
 103 static struct regulator_ops reg_ops = {
 104         .enable                 = regulator_enable_regmap,
 105         .disable                = regulator_disable_regmap,
 106         .is_enabled             = regulator_is_enabled_regmap,
 107         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 108         .map_voltage            = regulator_map_voltage_linear_range,
 109         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 110         .list_voltage           = regulator_list_voltage_linear_range,
 111 };
 112
 113 /* Operations permitted on load switches */
 114 static struct regulator_ops switch_ops = {
 115         .enable                 = regulator_enable_regmap,
 116         .disable                = regulator_disable_regmap,
 117         .is_enabled             = regulator_is_enabled_regmap,
 118 };
 119
 120 static int tps65086_of_parse_cb(struct device_node *dev,
 121                                 const struct regulator_desc *desc,
 122                                 struct regulator_config *config);
 123
 124 static struct tps65086_regulator regulators[] = {
 125         TPS65086_REGULATOR("BUCK1", "buck1", BUCK1, 0x80, TPS65086_BUCK1CTRL,
 126                            BUCK_VID_MASK, TPS65086_BUCK123CTRL, BIT(0),
 127                            tps65086_10mv_ranges, TPS65086_BUCK1CTRL,
 128                            BIT(0)),
 129         TPS65086_REGULATOR("BUCK2", "buck2", BUCK2, 0x80, TPS65086_BUCK2CTRL,
 130                            BUCK_VID_MASK, TPS65086_BUCK123CTRL, BIT(1),
 131                            tps65086_10mv_ranges, TPS65086_BUCK2CTRL,
 132                            BIT(0)),
 133         TPS65086_REGULATOR("BUCK3", "buck3", BUCK3, 0x80, TPS65086_BUCK3VID,
 134                            BUCK_VID_MASK, TPS65086_BUCK123CTRL, BIT(2),
 135                            tps65086_10mv_ranges, TPS65086_BUCK3DECAY,
 136                            BIT(0)),
 137         TPS65086_REGULATOR("BUCK4", "buck4", BUCK4, 0x80, TPS65086_BUCK4VID,
 138                            BUCK_VID_MASK, TPS65086_BUCK4CTRL, BIT(0),
 139                            tps65086_10mv_ranges, TPS65086_BUCK4VID,
 140                            BIT(0)),
 141         TPS65086_REGULATOR("BUCK5", "buck5", BUCK5, 0x80, TPS65086_BUCK5VID,
 142                            BUCK_VID_MASK, TPS65086_BUCK5CTRL, BIT(0),
 143                            tps65086_10mv_ranges, TPS65086_BUCK5CTRL,
 144                            BIT(0)),
 145         TPS65086_REGULATOR("BUCK6", "buck6", BUCK6, 0x80, TPS65086_BUCK6VID,
 146                            BUCK_VID_MASK, TPS65086_BUCK6CTRL, BIT(0),
 147                            tps65086_10mv_ranges, TPS65086_BUCK6CTRL,
 148                            BIT(0)),
 149         TPS65086_REGULATOR("LDOA1", "ldoa1", LDOA1, 0xF, TPS65086_LDOA1CTRL,
 150                            VDOA1_VID_MASK, TPS65086_LDOA1CTRL, BIT(0),
 151                            tps65086_ldoa1_ranges, 0, 0),
 152         TPS65086_REGULATOR("LDOA2", "ldoa2", LDOA2, 0x10, TPS65086_LDOA2VID,
 153                            VDOA23_VID_MASK, TPS65086_LDOA2CTRL, BIT(0),
 154                            tps65086_ldoa23_ranges, 0, 0),
 155         TPS65086_REGULATOR("LDOA3", "ldoa3", LDOA3, 0x10, TPS65086_LDOA3VID,
 156                            VDOA23_VID_MASK, TPS65086_LDOA3CTRL, BIT(0),
 157                            tps65086_ldoa23_ranges, 0, 0),
 158         TPS65086_SWITCH("SWA1", "swa1", SWA1, TPS65086_SWVTT_EN, BIT(5)),
 159         TPS65086_SWITCH("SWB1", "swb1", SWB1, TPS65086_SWVTT_EN, BIT(6)),
 160         TPS65086_SWITCH("SWB2", "swb2", SWB2, TPS65086_SWVTT_EN, BIT(7)),
 161         TPS65086_SWITCH("VTT", "vtt", VTT, TPS65086_SWVTT_EN, BIT(4)),
 162 };
 163
 164 static int tps65086_of_parse_cb(struct device_node *node,
 165                                 const struct regulator_desc *desc,
 166                                 struct regulator_config *config)
 167 {
 168         int ret;
 169
 170         /* Check for 25mV step mode */
 171         if (of_property_read_bool(node, "ti,regulator-step-size-25mv")) {
 172                 switch (desc->id) {
 173                 case BUCK1:
 174                 case BUCK2:
 175                 case BUCK6:
 176                         regulators[desc->id].desc.linear_ranges =
 177                                 tps65086_buck126_25mv_ranges;
 178                         regulators[desc->id].desc.n_linear_ranges =
 179                                 ARRAY_SIZE(tps65086_buck126_25mv_ranges);
 180                         break;
 181                 case BUCK3:
 182                 case BUCK4:
 183                 case BUCK5:
 184                         regulators[desc->id].desc.linear_ranges =
 185                                 tps65086_buck345_25mv_ranges;
 186                         regulators[desc->id].desc.n_linear_ranges =
 187                                 ARRAY_SIZE(tps65086_buck345_25mv_ranges);
 188                         break;
 189                 default:
 190                         dev_warn(config->dev, "25mV step mode only valid for BUCK regulators\n");
 191                 }
 192         }
 193
 194         /* Check for decay mode */
 195         if (desc->id <= BUCK6 && of_property_read_bool(node, "ti,regulator-decay")) {
 196                 ret = regmap_write_bits(config->regmap,
 197                                         regulators[desc->id].decay_reg,
 198                                         regulators[desc->id].decay_mask,
 199                                         regulators[desc->id].decay_mask);
 200                 if (ret) {
 201                         dev_err(config->dev, "Error setting decay\n");
 202                         return ret;
 203                 }
 204         }
 205
 206         return 0;
 207 }
 208
 209 static int tps65086_regulator_probe(struct platform_device *pdev)
 210 {
 211         struct tps65086 *tps = dev_get_drvdata(pdev->dev.parent);
 212         struct regulator_config config = { };
 213         struct regulator_dev *rdev;
 214         int i;
 215
 216         platform_set_drvdata(pdev, tps);
 217
 218         config.dev = &pdev->dev;
 219         config.dev->of_node = tps->dev->of_node;
 220         config.driver_data = tps;
 221         config.regmap = tps->regmap;
 222
 223         for (i = 0; i < ARRAY_SIZE(regulators); i++) {
 224                 rdev = devm_regulator_register(&pdev->dev, &regulators[i].desc,
 225                                                &config);
 226                 if (IS_ERR(rdev)) {
 227                         dev_err(tps->dev, "failed to register %s regulator\n",
 228                                 pdev->name);
 229                         return PTR_ERR(rdev);
 230                 }
 231         }
 232
 233         return 0;
 234 }
 235
 236 static const struct platform_device_id tps65086_regulator_id_table[] = {
 237         { "tps65086-regulator", },
 238         { /* sentinel */ }
 239 };
 240 MODULE_DEVICE_TABLE(platform, tps65086_regulator_id_table);
 241
 242 static struct platform_driver tps65086_regulator_driver = {
 243         .driver = {
 244                 .name = "tps65086-regulator",
 245         },
 246         .probe = tps65086_regulator_probe,
 247         .id_table = tps65086_regulator_id_table,
 248 };
 249 module_platform_driver(tps65086_regulator_driver);
 250
 251 MODULE_AUTHOR("Andrew F. Davis <afd@ti.com>");
 252 MODULE_DESCRIPTION("TPS65086 Regulator driver");
 253 MODULE_LICENSE("GPL v2");