drivers/regulator/tps65086-regulator.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (C) 2015 Texas Instruments Incorporated - https://www.ti.com/
   4  *
   5  * Author: Andrew F. Davis <afd@ti.com>
   6  *
   7  * Based on the TPS65912 driver
   8  */
   9
  10 #include <linux/module.h>
  11 #include <linux/of.h>
  12 #include <linux/platform_device.h>
  13 #include <linux/regulator/driver.h>
  14
  15 #include <linux/mfd/tps65086.h>
  16
  17 enum tps65086_regulators { BUCK1, BUCK2, BUCK3, BUCK4, BUCK5, BUCK6, LDOA1,
  18         LDOA2, LDOA3, SWA1, SWB1, SWB2, VTT };
  19
  20 #define TPS65086_REGULATOR(_name, _of, _id, _nv, _vr, _vm, _er, _em, _lr, _dr, _dm)     \
  21         [_id] = {                                                       \
  22                 .desc = {                                               \
  23                         .name                   = _name,                \
  24                         .of_match               = of_match_ptr(_of),    \
  25                         .regulators_node        = "regulators",         \
  26                         .of_parse_cb            = tps65086_of_parse_cb, \
  27                         .id                     = _id,                  \
  28                         .ops                    = &reg_ops,             \
  29                         .n_voltages             = _nv,                  \
  30                         .type                   = REGULATOR_VOLTAGE,    \
  31                         .owner                  = THIS_MODULE,          \
  32                         .vsel_reg               = _vr,                  \
  33                         .vsel_mask              = _vm,                  \
  34                         .enable_reg             = _er,                  \
  35                         .enable_mask            = _em,                  \
  36                         .volt_table             = NULL,                 \
  37                         .linear_ranges          = _lr,                  \
  38                         .n_linear_ranges        = ARRAY_SIZE(_lr),      \
  39                 },                                                      \
  40                 .decay_reg = _dr,                                       \
  41                 .decay_mask = _dm,                                      \
  42         }
  43
  44 #define TPS65086_SWITCH(_name, _of, _id, _er, _em)                      \
  45         [_id] = {                                                       \
  46                 .desc = {                                               \
  47                         .name                   = _name,                \
  48                         .of_match               = of_match_ptr(_of),    \
  49                         .regulators_node        = "regulators",         \
  50                         .of_parse_cb            = tps65086_of_parse_cb, \
  51                         .id                     = _id,                  \
  52                         .ops                    = &switch_ops,          \
  53                         .type                   = REGULATOR_VOLTAGE,    \
  54                         .owner                  = THIS_MODULE,          \
  55                         .enable_reg             = _er,                  \
  56                         .enable_mask            = _em,                  \
  57                 },                                                      \
  58         }
  59
  60 struct tps65086_regulator {
  61         struct regulator_desc desc;
  62         unsigned int decay_reg;
  63         unsigned int decay_mask;
  64 };
  65
  66 static const struct linear_range tps65086_10mv_ranges[] = {
  67         REGULATOR_LINEAR_RANGE(0, 0x0, 0x0, 0),
  68         REGULATOR_LINEAR_RANGE(410000, 0x1, 0x7F, 10000),
  69 };
  70
  71 static const struct linear_range tps65086_buck126_25mv_ranges[] = {
  72         REGULATOR_LINEAR_RANGE(0, 0x0, 0x0, 0),
  73         REGULATOR_LINEAR_RANGE(1000000, 0x1, 0x18, 0),
  74         REGULATOR_LINEAR_RANGE(1025000, 0x19, 0x7F, 25000),
  75 };
  76
  77 static const struct linear_range tps65086_buck345_25mv_ranges[] = {
  78         REGULATOR_LINEAR_RANGE(0, 0x0, 0x0, 0),
  79         REGULATOR_LINEAR_RANGE(425000, 0x1, 0x7F, 25000),
  80 };
  81
  82 static const struct linear_range tps65086_ldoa1_ranges[] = {
  83         REGULATOR_LINEAR_RANGE(1350000, 0x0, 0x0, 0),
  84         REGULATOR_LINEAR_RANGE(1500000, 0x1, 0x7, 100000),
  85         REGULATOR_LINEAR_RANGE(2300000, 0x8, 0xB, 100000),
  86         REGULATOR_LINEAR_RANGE(2850000, 0xC, 0xD, 150000),
  87         REGULATOR_LINEAR_RANGE(3300000, 0xE, 0xE, 0),
  88 };
  89
  90 static const struct linear_range tps65086_ldoa23_ranges[] = {
  91         REGULATOR_LINEAR_RANGE(700000, 0x0, 0xD, 50000),
  92         REGULATOR_LINEAR_RANGE(1400000, 0xE, 0xF, 100000),
  93 };
  94
  95 /* Operations permitted on regulators */
  96 static const struct regulator_ops reg_ops = {
  97         .enable                 = regulator_enable_regmap,
  98         .disable                = regulator_disable_regmap,
  99         .is_enabled             = regulator_is_enabled_regmap,
 100         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 101         .map_voltage            = regulator_map_voltage_linear_range,
 102         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 103         .list_voltage           = regulator_list_voltage_linear_range,
 104 };
 105
 106 /* Operations permitted on load switches */
 107 static const struct regulator_ops switch_ops = {
 108         .enable                 = regulator_enable_regmap,
 109         .disable                = regulator_disable_regmap,
 110         .is_enabled             = regulator_is_enabled_regmap,
 111 };
 112
 113 static int tps65086_of_parse_cb(struct device_node *dev,
 114                                 const struct regulator_desc *desc,
 115                                 struct regulator_config *config);
 116
 117 static struct tps65086_regulator regulators[] = {
 118         TPS65086_REGULATOR("BUCK1", "buck1", BUCK1, 0x80, TPS65086_BUCK1CTRL,
 119                            BUCK_VID_MASK, TPS65086_BUCK123CTRL, BIT(0),
 120                            tps65086_10mv_ranges, TPS65086_BUCK1CTRL,
 121                            BIT(0)),
 122         TPS65086_REGULATOR("BUCK2", "buck2", BUCK2, 0x80, TPS65086_BUCK2CTRL,
 123                            BUCK_VID_MASK, TPS65086_BUCK123CTRL, BIT(1),
 124                            tps65086_10mv_ranges, TPS65086_BUCK2CTRL,
 125                            BIT(0)),
 126         TPS65086_REGULATOR("BUCK3", "buck3", BUCK3, 0x80, TPS65086_BUCK3VID,
 127                            BUCK_VID_MASK, TPS65086_BUCK123CTRL, BIT(2),
 128                            tps65086_10mv_ranges, TPS65086_BUCK3DECAY,
 129                            BIT(0)),
 130         TPS65086_REGULATOR("BUCK4", "buck4", BUCK4, 0x80, TPS65086_BUCK4VID,
 131                            BUCK_VID_MASK, TPS65086_BUCK4CTRL, BIT(0),
 132                            tps65086_10mv_ranges, TPS65086_BUCK4VID,
 133                            BIT(0)),
 134         TPS65086_REGULATOR("BUCK5", "buck5", BUCK5, 0x80, TPS65086_BUCK5VID,
 135                            BUCK_VID_MASK, TPS65086_BUCK5CTRL, BIT(0),
 136                            tps65086_10mv_ranges, TPS65086_BUCK5CTRL,
 137                            BIT(0)),
 138         TPS65086_REGULATOR("BUCK6", "buck6", BUCK6, 0x80, TPS65086_BUCK6VID,
 139                            BUCK_VID_MASK, TPS65086_BUCK6CTRL, BIT(0),
 140                            tps65086_10mv_ranges, TPS65086_BUCK6CTRL,
 141                            BIT(0)),
 142         TPS65086_REGULATOR("LDOA1", "ldoa1", LDOA1, 0xF, TPS65086_LDOA1CTRL,
 143                            VDOA1_VID_MASK, TPS65086_LDOA1CTRL, BIT(0),
 144                            tps65086_ldoa1_ranges, 0, 0),
 145         TPS65086_REGULATOR("LDOA2", "ldoa2", LDOA2, 0x10, TPS65086_LDOA2VID,
 146                            VDOA23_VID_MASK, TPS65086_LDOA2CTRL, BIT(0),
 147                            tps65086_ldoa23_ranges, 0, 0),
 148         TPS65086_REGULATOR("LDOA3", "ldoa3", LDOA3, 0x10, TPS65086_LDOA3VID,
 149                            VDOA23_VID_MASK, TPS65086_LDOA3CTRL, BIT(0),
 150                            tps65086_ldoa23_ranges, 0, 0),
 151         TPS65086_SWITCH("SWA1", "swa1", SWA1, TPS65086_SWVTT_EN, BIT(5)),
 152         TPS65086_SWITCH("SWB1", "swb1", SWB1, TPS65086_SWVTT_EN, BIT(6)),
 153         TPS65086_SWITCH("SWB2", "swb2", SWB2, TPS65086_SWVTT_EN, BIT(7)),
 154         TPS65086_SWITCH("VTT", "vtt", VTT, TPS65086_SWVTT_EN, BIT(4)),
 155 };
 156
 157 static int tps65086_of_parse_cb(struct device_node *node,
 158                                 const struct regulator_desc *desc,
 159                                 struct regulator_config *config)
 160 {
 161         int ret;
 162
 163         /* Check for 25mV step mode */
 164         if (of_property_read_bool(node, "ti,regulator-step-size-25mv")) {
 165                 switch (desc->id) {
 166                 case BUCK1:
 167                 case BUCK2:
 168                 case BUCK6:
 169                         regulators[desc->id].desc.linear_ranges =
 170                                 tps65086_buck126_25mv_ranges;
 171                         regulators[desc->id].desc.n_linear_ranges =
 172                                 ARRAY_SIZE(tps65086_buck126_25mv_ranges);
 173                         break;
 174                 case BUCK3:
 175                 case BUCK4:
 176                 case BUCK5:
 177                         regulators[desc->id].desc.linear_ranges =
 178                                 tps65086_buck345_25mv_ranges;
 179                         regulators[desc->id].desc.n_linear_ranges =
 180                                 ARRAY_SIZE(tps65086_buck345_25mv_ranges);
 181                         break;
 182                 default:
 183                         dev_warn(config->dev, "25mV step mode only valid for BUCK regulators\n");
 184                 }
 185         }
 186
 187         /* Check for decay mode */
 188         if (desc->id <= BUCK6 && of_property_read_bool(node, "ti,regulator-decay")) {
 189                 ret = regmap_write_bits(config->regmap,
 190                                         regulators[desc->id].decay_reg,
 191                                         regulators[desc->id].decay_mask,
 192                                         regulators[desc->id].decay_mask);
 193                 if (ret) {
 194                         dev_err(config->dev, "Error setting decay\n");
 195                         return ret;
 196                 }
 197         }
 198
 199         return 0;
 200 }
 201
 202 static int tps65086_regulator_probe(struct platform_device *pdev)
 203 {
 204         struct tps65086 *tps = dev_get_drvdata(pdev->dev.parent);
 205         struct regulator_config config = { };
 206         struct regulator_dev *rdev;
 207         int i;
 208
 209         platform_set_drvdata(pdev, tps);
 210
 211         config.dev = &pdev->dev;
 212         config.dev->of_node = tps->dev->of_node;
 213         config.driver_data = tps;
 214         config.regmap = tps->regmap;
 215
 216         for (i = 0; i < ARRAY_SIZE(regulators); i++) {
 217                 rdev = devm_regulator_register(&pdev->dev, &regulators[i].desc,
 218                                                &config);
 219                 if (IS_ERR(rdev)) {
 220                         dev_err(tps->dev, "failed to register %s regulator\n",
 221                                 pdev->name);
 222                         return PTR_ERR(rdev);
 223                 }
 224         }
 225
 226         return 0;
 227 }
 228
 229 static const struct platform_device_id tps65086_regulator_id_table[] = {
 230         { "tps65086-regulator", },
 231         { /* sentinel */ }
 232 };
 233 MODULE_DEVICE_TABLE(platform, tps65086_regulator_id_table);
 234
 235 static struct platform_driver tps65086_regulator_driver = {
 236         .driver = {
 237                 .name = "tps65086-regulator",
 238                 .probe_type = PROBE_PREFER_ASYNCHRONOUS,
 239         },
 240         .probe = tps65086_regulator_probe,
 241         .id_table = tps65086_regulator_id_table,
 242 };
 243 module_platform_driver(tps65086_regulator_driver);
 244
 245 MODULE_AUTHOR("Andrew F. Davis <afd@ti.com>");
 246 MODULE_DESCRIPTION("TPS65086 Regulator driver");
 247 MODULE_LICENSE("GPL v2");