drivers/regulator/sm5703-regulator.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2
   3 #include <linux/mfd/sm5703.h>
   4 #include <linux/module.h>
   5 #include <linux/mod_devicetable.h>
   6 #include <linux/platform_device.h>
   7 #include <linux/regmap.h>
   8 #include <linux/regulator/driver.h>
   9 #include <linux/regulator/of_regulator.h>
  10
  11 enum sm5703_regulators {
  12         SM5703_BUCK,
  13         SM5703_LDO1,
  14         SM5703_LDO2,
  15         SM5703_LDO3,
  16         SM5703_USBLDO1,
  17         SM5703_USBLDO2,
  18         SM5703_VBUS,
  19         SM5703_MAX_REGULATORS,
  20 };
  21
  22 static const int sm5703_ldo_voltagemap[] = {
  23         1500000, 1800000, 2600000, 2800000, 3000000, 3300000,
  24 };
  25
  26 static const int sm5703_buck_voltagemap[] = {
  27         1000000, 1000000, 1000000, 1000000,
  28         1000000, 1000000, 1000000, 1000000,
  29         1000000, 1000000, 1000000, 1100000,
  30         1200000, 1300000, 1400000, 1500000,
  31         1600000, 1700000, 1800000, 1900000,
  32         2000000, 2100000, 2200000, 2300000,
  33         2400000, 2500000, 2600000, 2700000,
  34         2800000, 2900000, 3000000, 3000000,
  35 };
  36
  37 #define SM5703USBLDO(_name, _id)                                        \
  38         [SM5703_USBLDO ## _id] = {                                      \
  39                 .name = _name,                                          \
  40                 .of_match = _name,                                      \
  41                 .regulators_node = "regulators",                        \
  42                 .type = REGULATOR_VOLTAGE,                              \
  43                 .id = SM5703_USBLDO ## _id,                             \
  44                 .ops = &sm5703_regulator_ops_fixed,                     \
  45                 .fixed_uV = SM5703_USBLDO_MICROVOLT,                    \
  46                 .enable_reg = SM5703_REG_USBLDO12,                      \
  47                 .enable_mask = SM5703_REG_EN_USBLDO ##_id,              \
  48                 .owner                  = THIS_MODULE,                  \
  49         }
  50
  51 #define SM5703VBUS(_name)                                               \
  52         [SM5703_VBUS] = {                                               \
  53                 .name = _name,                                          \
  54                 .of_match = _name,                                      \
  55                 .regulators_node = "regulators",                        \
  56                 .type = REGULATOR_VOLTAGE,                              \
  57                 .id = SM5703_VBUS,                                      \
  58                 .ops = &sm5703_regulator_ops_fixed,                     \
  59                 .fixed_uV = SM5703_VBUS_MICROVOLT,                      \
  60                 .enable_reg = SM5703_REG_CNTL,                          \
  61                 .enable_mask = SM5703_OPERATION_MODE_MASK,              \
  62                 .enable_val = SM5703_OPERATION_MODE_USB_OTG_MODE,       \
  63                 .disable_val = SM5703_OPERATION_MODE_CHARGING_ON,       \
  64                 .owner                  = THIS_MODULE,                  \
  65         }
  66
  67 #define SM5703BUCK(_name)                                               \
  68         [SM5703_BUCK] = {                                               \
  69                 .name = _name,                                          \
  70                 .of_match = _name,                                      \
  71                 .regulators_node = "regulators",                        \
  72                 .type = REGULATOR_VOLTAGE,                              \
  73                 .id = SM5703_BUCK,                                      \
  74                 .ops = &sm5703_regulator_ops,                           \
  75                 .n_voltages = ARRAY_SIZE(sm5703_buck_voltagemap),       \
  76                 .volt_table = sm5703_buck_voltagemap,                   \
  77                 .vsel_reg = SM5703_REG_BUCK,                            \
  78                 .vsel_mask = SM5703_BUCK_VOLT_MASK,                     \
  79                 .enable_reg = SM5703_REG_BUCK,                          \
  80                 .enable_mask = SM5703_REG_EN_BUCK,                      \
  81                 .owner                  = THIS_MODULE,                  \
  82         }
  83
  84 #define SM5703LDO(_name, _id)                                           \
  85         [SM5703_LDO ## _id] = {                                         \
  86                 .name = _name,                                          \
  87                 .of_match = _name,                                      \
  88                 .regulators_node = "regulators",                        \
  89                 .type = REGULATOR_VOLTAGE,                              \
  90                 .id = SM5703_LDO ## _id,                                \
  91                 .ops = &sm5703_regulator_ops,                           \
  92                 .n_voltages = ARRAY_SIZE(sm5703_ldo_voltagemap),        \
  93                 .volt_table = sm5703_ldo_voltagemap,                    \
  94                 .vsel_reg = SM5703_REG_LDO ##_id,                       \
  95                 .vsel_mask = SM5703_LDO_VOLT_MASK,                      \
  96                 .enable_reg = SM5703_REG_LDO ##_id,                     \
  97                 .enable_mask = SM5703_LDO_EN,                           \
  98                 .owner                  = THIS_MODULE,                  \
  99         }
 100
 101 static const struct regulator_ops sm5703_regulator_ops = {
 102         .enable                 = regulator_enable_regmap,
 103         .disable                = regulator_disable_regmap,
 104         .is_enabled             = regulator_is_enabled_regmap,
 105         .list_voltage           = regulator_list_voltage_table,
 106         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 107         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 108 };
 109
 110 static const struct regulator_ops sm5703_regulator_ops_fixed = {
 111         .enable                 = regulator_enable_regmap,
 112         .disable                = regulator_disable_regmap,
 113         .is_enabled             = regulator_is_enabled_regmap,
 114 };
 115
 116 static struct regulator_desc sm5703_regulators_desc[SM5703_MAX_REGULATORS] = {
 117         SM5703BUCK("buck"),
 118         SM5703LDO("ldo1", 1),
 119         SM5703LDO("ldo2", 2),
 120         SM5703LDO("ldo3", 3),
 121         SM5703USBLDO("usbldo1", 1),
 122         SM5703USBLDO("usbldo2", 2),
 123         SM5703VBUS("vbus"),
 124 };
 125
 126 static int sm5703_regulator_probe(struct platform_device *pdev)
 127 {
 128         struct device *dev = &pdev->dev;
 129         struct regulator_config config = { NULL, };
 130         struct regulator_dev *rdev;
 131         struct sm5703_dev *sm5703 = dev_get_drvdata(pdev->dev.parent);
 132         int i;
 133
 134         config.dev = dev->parent;
 135         config.regmap = sm5703->regmap;
 136
 137         for (i = 0; i < SM5703_MAX_REGULATORS; i++) {
 138                 rdev = devm_regulator_register(dev,
 139                                                &sm5703_regulators_desc[i],
 140                                                &config);
 141                 if (IS_ERR(rdev))
 142                         return dev_err_probe(dev, PTR_ERR(rdev),
 143                                              "Failed to register a regulator\n");
 144         }
 145
 146         return 0;
 147 }
 148
 149 static const struct platform_device_id sm5703_regulator_id[] = {
 150         { "sm5703-regulator", 0 },
 151         {}
 152 };
 153 MODULE_DEVICE_TABLE(platform, sm5703_regulator_id);
 154
 155 static struct platform_driver sm5703_regulator_driver = {
 156         .driver = {
 157                 .name = "sm5703-regulator",
 158         },
 159         .probe  = sm5703_regulator_probe,
 160         .id_table       = sm5703_regulator_id,
 161 };
 162
 163 module_platform_driver(sm5703_regulator_driver);
 164
 165 MODULE_DESCRIPTION("Silicon Mitus SM5703 LDO/Buck/USB regulator driver");
 166 MODULE_AUTHOR("Markuss Broks <markuss.broks@gmail.com>");
 167 MODULE_LICENSE("GPL");