drivers/regulator/lp87565-regulator.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Regulator driver for LP87565 PMIC
   4  *
   5  * Copyright (C) 2017 Texas Instruments Incorporated - https://www.ti.com/
   6  */
   7
   8 #include <linux/module.h>
   9 #include <linux/platform_device.h>
  10 #include <linux/regmap.h>
  11
  12 #include <linux/mfd/lp87565.h>
  13
  14 #define LP87565_REGULATOR(_name, _id, _of, _ops, _n, _vr, _vm,          \
  15                           _er, _em, _ev, _delay, _lr, _cr)              \
  16         [_id] = {                                                       \
  17                 .desc = {                                               \
  18                         .name                   = _name,                \
  19                         .supply_name            = _of "-in",            \
  20                         .id                     = _id,                  \
  21                         .of_match               = of_match_ptr(_of),    \
  22                         .regulators_node        = of_match_ptr("regulators"),\
  23                         .ops                    = &_ops,                \
  24                         .n_voltages             = _n,                   \
  25                         .type                   = REGULATOR_VOLTAGE,    \
  26                         .owner                  = THIS_MODULE,          \
  27                         .vsel_reg               = _vr,                  \
  28                         .vsel_mask              = _vm,                  \
  29                         .enable_reg             = _er,                  \
  30                         .enable_mask            = _em,                  \
  31                         .enable_val             = _ev,                  \
  32                         .ramp_delay             = _delay,               \
  33                         .linear_ranges          = _lr,                  \
  34                         .n_linear_ranges        = ARRAY_SIZE(_lr),      \
  35                         .curr_table = lp87565_buck_uA,                  \
  36                         .n_current_limits = ARRAY_SIZE(lp87565_buck_uA),\
  37                         .csel_reg = (_cr),                              \
  38                         .csel_mask = LP87565_BUCK_CTRL_2_ILIM,          \
  39                 },                                                      \
  40                 .ctrl2_reg = _cr,                                       \
  41         }
  42
  43 struct lp87565_regulator {
  44         struct regulator_desc desc;
  45         unsigned int ctrl2_reg;
  46 };
  47
  48 static const struct lp87565_regulator regulators[];
  49
  50 static const struct linear_range buck0_1_2_3_ranges[] = {
  51         REGULATOR_LINEAR_RANGE(600000, 0xA, 0x17, 10000),
  52         REGULATOR_LINEAR_RANGE(735000, 0x18, 0x9d, 5000),
  53         REGULATOR_LINEAR_RANGE(1420000, 0x9e, 0xff, 20000),
  54 };
  55
  56 static const unsigned int lp87565_buck_ramp_delay[] = {
  57         30000, 15000, 10000, 7500, 3800, 1900, 940, 470
  58 };
  59
  60 /* LP87565 BUCK current limit */
  61 static const unsigned int lp87565_buck_uA[] = {
  62         1500000, 2000000, 2500000, 3000000, 3500000, 4000000, 4500000, 5000000,
  63 };
  64
  65 static int lp87565_buck_set_ramp_delay(struct regulator_dev *rdev,
  66                                        int ramp_delay)
  67 {
  68         int id = rdev_get_id(rdev);
  69         unsigned int reg;
  70         int ret;
  71
  72         if (ramp_delay <= 470)
  73                 reg = 7;
  74         else if (ramp_delay <= 940)
  75                 reg = 6;
  76         else if (ramp_delay <= 1900)
  77                 reg = 5;
  78         else if (ramp_delay <= 3800)
  79                 reg = 4;
  80         else if (ramp_delay <= 7500)
  81                 reg = 3;
  82         else if (ramp_delay <= 10000)
  83                 reg = 2;
  84         else if (ramp_delay <= 15000)
  85                 reg = 1;
  86         else
  87                 reg = 0;
  88
  89         ret = regmap_update_bits(rdev->regmap, regulators[id].ctrl2_reg,
  90                                  LP87565_BUCK_CTRL_2_SLEW_RATE,
  91                                  reg << __ffs(LP87565_BUCK_CTRL_2_SLEW_RATE));
  92         if (ret) {
  93                 dev_err(&rdev->dev, "SLEW RATE write failed: %d\n", ret);
  94                 return ret;
  95         }
  96
  97         rdev->constraints->ramp_delay = lp87565_buck_ramp_delay[reg];
  98
  99         /* Conservatively give a 15% margin */
 100         rdev->constraints->ramp_delay =
 101                                 rdev->constraints->ramp_delay * 85 / 100;
 102
 103         return 0;
 104 }
 105
 106 /* Operations permitted on BUCKs */
 107 static const struct regulator_ops lp87565_buck_ops = {
 108         .is_enabled             = regulator_is_enabled_regmap,
 109         .enable                 = regulator_enable_regmap,
 110         .disable                = regulator_disable_regmap,
 111         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 112         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 113         .list_voltage           = regulator_list_voltage_linear_range,
 114         .map_voltage            = regulator_map_voltage_linear_range,
 115         .set_voltage_time_sel   = regulator_set_voltage_time_sel,
 116         .set_ramp_delay         = lp87565_buck_set_ramp_delay,
 117         .set_current_limit      = regulator_set_current_limit_regmap,
 118         .get_current_limit      = regulator_get_current_limit_regmap,
 119 };
 120
 121 static const struct lp87565_regulator regulators[] = {
 122         LP87565_REGULATOR("BUCK0", LP87565_BUCK_0, "buck0", lp87565_buck_ops,
 123                           256, LP87565_REG_BUCK0_VOUT, LP87565_BUCK_VSET,
 124                           LP87565_REG_BUCK0_CTRL_1,
 125                           LP87565_BUCK_CTRL_1_EN |
 126                           LP87565_BUCK_CTRL_1_EN_PIN_CTRL,
 127                           LP87565_BUCK_CTRL_1_EN, 3230,
 128                           buck0_1_2_3_ranges, LP87565_REG_BUCK0_CTRL_2),
 129         LP87565_REGULATOR("BUCK1", LP87565_BUCK_1, "buck1", lp87565_buck_ops,
 130                           256, LP87565_REG_BUCK1_VOUT, LP87565_BUCK_VSET,
 131                           LP87565_REG_BUCK1_CTRL_1,
 132                           LP87565_BUCK_CTRL_1_EN |
 133                           LP87565_BUCK_CTRL_1_EN_PIN_CTRL,
 134                           LP87565_BUCK_CTRL_1_EN, 3230,
 135                           buck0_1_2_3_ranges, LP87565_REG_BUCK1_CTRL_2),
 136         LP87565_REGULATOR("BUCK2", LP87565_BUCK_2, "buck2", lp87565_buck_ops,
 137                           256, LP87565_REG_BUCK2_VOUT, LP87565_BUCK_VSET,
 138                           LP87565_REG_BUCK2_CTRL_1,
 139                           LP87565_BUCK_CTRL_1_EN |
 140                           LP87565_BUCK_CTRL_1_EN_PIN_CTRL,
 141                           LP87565_BUCK_CTRL_1_EN, 3230,
 142                           buck0_1_2_3_ranges, LP87565_REG_BUCK2_CTRL_2),
 143         LP87565_REGULATOR("BUCK3", LP87565_BUCK_3, "buck3", lp87565_buck_ops,
 144                           256, LP87565_REG_BUCK3_VOUT, LP87565_BUCK_VSET,
 145                           LP87565_REG_BUCK3_CTRL_1,
 146                           LP87565_BUCK_CTRL_1_EN |
 147                           LP87565_BUCK_CTRL_1_EN_PIN_CTRL,
 148                           LP87565_BUCK_CTRL_1_EN, 3230,
 149                           buck0_1_2_3_ranges, LP87565_REG_BUCK3_CTRL_2),
 150         LP87565_REGULATOR("BUCK10", LP87565_BUCK_10, "buck10", lp87565_buck_ops,
 151                           256, LP87565_REG_BUCK0_VOUT, LP87565_BUCK_VSET,
 152                           LP87565_REG_BUCK0_CTRL_1,
 153                           LP87565_BUCK_CTRL_1_EN |
 154                           LP87565_BUCK_CTRL_1_EN_PIN_CTRL |
 155                           LP87565_BUCK_CTRL_1_FPWM_MP_0_2,
 156                           LP87565_BUCK_CTRL_1_EN |
 157                           LP87565_BUCK_CTRL_1_FPWM_MP_0_2, 3230,
 158                           buck0_1_2_3_ranges, LP87565_REG_BUCK0_CTRL_2),
 159         LP87565_REGULATOR("BUCK23", LP87565_BUCK_23, "buck23", lp87565_buck_ops,
 160                           256, LP87565_REG_BUCK2_VOUT, LP87565_BUCK_VSET,
 161                           LP87565_REG_BUCK2_CTRL_1,
 162                           LP87565_BUCK_CTRL_1_EN |
 163                           LP87565_BUCK_CTRL_1_EN_PIN_CTRL,
 164                           LP87565_BUCK_CTRL_1_EN, 3230,
 165                           buck0_1_2_3_ranges, LP87565_REG_BUCK2_CTRL_2),
 166         LP87565_REGULATOR("BUCK3210", LP87565_BUCK_3210, "buck3210",
 167                           lp87565_buck_ops, 256, LP87565_REG_BUCK0_VOUT,
 168                           LP87565_BUCK_VSET, LP87565_REG_BUCK0_CTRL_1,
 169                           LP87565_BUCK_CTRL_1_EN |
 170                           LP87565_BUCK_CTRL_1_EN_PIN_CTRL |
 171                           LP87565_BUCK_CTRL_1_FPWM_MP_0_2,
 172                           LP87565_BUCK_CTRL_1_EN |
 173                           LP87565_BUCK_CTRL_1_FPWM_MP_0_2, 3230,
 174                           buck0_1_2_3_ranges, LP87565_REG_BUCK0_CTRL_2),
 175 };
 176
 177 static int lp87565_regulator_probe(struct platform_device *pdev)
 178 {
 179         struct lp87565 *lp87565 = dev_get_drvdata(pdev->dev.parent);
 180         struct regulator_config config = { };
 181         struct regulator_dev *rdev;
 182         int i, min_idx, max_idx;
 183
 184         platform_set_drvdata(pdev, lp87565);
 185
 186         config.dev = &pdev->dev;
 187         config.dev->of_node = lp87565->dev->of_node;
 188         config.driver_data = lp87565;
 189         config.regmap = lp87565->regmap;
 190
 191         switch (lp87565->dev_type) {
 192         case LP87565_DEVICE_TYPE_LP87565_Q1:
 193                 min_idx = LP87565_BUCK_10;
 194                 max_idx = LP87565_BUCK_23;
 195                 break;
 196         case LP87565_DEVICE_TYPE_LP87561_Q1:
 197                 min_idx = LP87565_BUCK_3210;
 198                 max_idx = LP87565_BUCK_3210;
 199                 break;
 200         default:
 201                 min_idx = LP87565_BUCK_0;
 202                 max_idx = LP87565_BUCK_3;
 203                 break;
 204         }
 205
 206         for (i = min_idx; i <= max_idx; i++) {
 207                 rdev = devm_regulator_register(&pdev->dev, &regulators[i].desc,
 208                                                &config);
 209                 if (IS_ERR(rdev)) {
 210                         dev_err(lp87565->dev, "failed to register %s regulator\n",
 211                                 pdev->name);
 212                         return PTR_ERR(rdev);
 213                 }
 214         }
 215
 216         return 0;
 217 }
 218
 219 static const struct platform_device_id lp87565_regulator_id_table[] = {
 220         { "lp87565-regulator", },
 221         { "lp87565-q1-regulator", },
 222         { /* sentinel */ }
 223 };
 224 MODULE_DEVICE_TABLE(platform, lp87565_regulator_id_table);
 225
 226 static struct platform_driver lp87565_regulator_driver = {
 227         .driver = {
 228                 .name = "lp87565-pmic",
 229         },
 230         .probe = lp87565_regulator_probe,
 231         .id_table = lp87565_regulator_id_table,
 232 };
 233 module_platform_driver(lp87565_regulator_driver);
 234
 235 MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>");
 236 MODULE_DESCRIPTION("LP87565 voltage regulator driver");
 237 MODULE_LICENSE("GPL v2");