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                 .n_voltages = 1,                                        \
  46                 .fixed_uV = SM5703_USBLDO_MICROVOLT,                    \
  47                 .enable_reg = SM5703_REG_USBLDO12,                      \
  48                 .enable_mask = SM5703_REG_EN_USBLDO ##_id,              \
  49                 .owner                  = THIS_MODULE,                  \
  50         }
  51
  52 #define SM5703VBUS(_name)                                               \
  53         [SM5703_VBUS] = {                                               \
  54                 .name = _name,                                          \
  55                 .of_match = _name,                                      \
  56                 .regulators_node = "regulators",                        \
  57                 .type = REGULATOR_VOLTAGE,                              \
  58                 .id = SM5703_VBUS,                                      \
  59                 .ops = &sm5703_regulator_ops_fixed,                     \
  60                 .n_voltages = 1,                                        \
  61                 .fixed_uV = SM5703_VBUS_MICROVOLT,                      \
  62                 .enable_reg = SM5703_REG_CNTL,                          \
  63                 .enable_mask = SM5703_OPERATION_MODE_MASK,              \
  64                 .enable_val = SM5703_OPERATION_MODE_USB_OTG_MODE,       \
  65                 .disable_val = SM5703_OPERATION_MODE_CHARGING_ON,       \
  66                 .owner                  = THIS_MODULE,                  \
  67         }
  68
  69 #define SM5703BUCK(_name)                                               \
  70         [SM5703_BUCK] = {                                               \
  71                 .name = _name,                                          \
  72                 .of_match = _name,                                      \
  73                 .regulators_node = "regulators",                        \
  74                 .type = REGULATOR_VOLTAGE,                              \
  75                 .id = SM5703_BUCK,                                      \
  76                 .ops = &sm5703_regulator_ops,                           \
  77                 .n_voltages = ARRAY_SIZE(sm5703_buck_voltagemap),       \
  78                 .volt_table = sm5703_buck_voltagemap,                   \
  79                 .vsel_reg = SM5703_REG_BUCK,                            \
  80                 .vsel_mask = SM5703_BUCK_VOLT_MASK,                     \
  81                 .enable_reg = SM5703_REG_BUCK,                          \
  82                 .enable_mask = SM5703_REG_EN_BUCK,                      \
  83                 .owner                  = THIS_MODULE,                  \
  84         }
  85
  86 #define SM5703LDO(_name, _id)                                           \
  87         [SM5703_LDO ## _id] = {                                         \
  88                 .name = _name,                                          \
  89                 .of_match = _name,                                      \
  90                 .regulators_node = "regulators",                        \
  91                 .type = REGULATOR_VOLTAGE,                              \
  92                 .id = SM5703_LDO ## _id,                                \
  93                 .ops = &sm5703_regulator_ops,                           \
  94                 .n_voltages = ARRAY_SIZE(sm5703_ldo_voltagemap),        \
  95                 .volt_table = sm5703_ldo_voltagemap,                    \
  96                 .vsel_reg = SM5703_REG_LDO ##_id,                       \
  97                 .vsel_mask = SM5703_LDO_VOLT_MASK,                      \
  98                 .enable_reg = SM5703_REG_LDO ##_id,                     \
  99                 .enable_mask = SM5703_LDO_EN,                           \
 100                 .owner                  = THIS_MODULE,                  \
 101         }
 102
 103 static const struct regulator_ops sm5703_regulator_ops = {
 104         .enable                 = regulator_enable_regmap,
 105         .disable                = regulator_disable_regmap,
 106         .is_enabled             = regulator_is_enabled_regmap,
 107         .list_voltage           = regulator_list_voltage_table,
 108         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 109         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 110 };
 111
 112 static const struct regulator_ops sm5703_regulator_ops_fixed = {
 113         .enable                 = regulator_enable_regmap,
 114         .disable                = regulator_disable_regmap,
 115         .is_enabled             = regulator_is_enabled_regmap,
 116 };
 117
 118 static struct regulator_desc sm5703_regulators_desc[SM5703_MAX_REGULATORS] = {
 119         SM5703BUCK("buck"),
 120         SM5703LDO("ldo1", 1),
 121         SM5703LDO("ldo2", 2),
 122         SM5703LDO("ldo3", 3),
 123         SM5703USBLDO("usbldo1", 1),
 124         SM5703USBLDO("usbldo2", 2),
 125         SM5703VBUS("vbus"),
 126 };
 127
 128 static int sm5703_regulator_probe(struct platform_device *pdev)
 129 {
 130         struct device *dev = &pdev->dev;
 131         struct regulator_config config = { NULL, };
 132         struct regulator_dev *rdev;
 133         struct sm5703_dev *sm5703 = dev_get_drvdata(pdev->dev.parent);
 134         int i;
 135
 136         config.dev = dev->parent;
 137         config.regmap = sm5703->regmap;
 138
 139         for (i = 0; i < SM5703_MAX_REGULATORS; i++) {
 140                 rdev = devm_regulator_register(dev,
 141                                                &sm5703_regulators_desc[i],
 142                                                &config);
 143                 if (IS_ERR(rdev))
 144                         return dev_err_probe(dev, PTR_ERR(rdev),
 145                                              "Failed to register a regulator\n");
 146         }
 147
 148         return 0;
 149 }
 150
 151 static const struct platform_device_id sm5703_regulator_id[] = {
 152         { "sm5703-regulator", 0 },
 153         {}
 154 };
 155 MODULE_DEVICE_TABLE(platform, sm5703_regulator_id);
 156
 157 static struct platform_driver sm5703_regulator_driver = {
 158         .driver = {
 159                 .name = "sm5703-regulator",
 160                 .probe_type = PROBE_PREFER_ASYNCHRONOUS,
 161         },
 162         .probe  = sm5703_regulator_probe,
 163         .id_table       = sm5703_regulator_id,
 164 };
 165
 166 module_platform_driver(sm5703_regulator_driver);
 167
 168 MODULE_DESCRIPTION("Silicon Mitus SM5703 LDO/Buck/USB regulator driver");
 169 MODULE_AUTHOR("Markuss Broks <markuss.broks@gmail.com>");
 170 MODULE_LICENSE("GPL");