drivers/regulator/fan53880.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 #include <linux/module.h>
   3 #include <linux/i2c.h>
   4 #include <linux/regmap.h>
   5 #include <linux/regulator/driver.h>
   6
   7 enum fan53880_regulator_ids {
   8         FAN53880_LDO1,
   9         FAN53880_LDO2,
  10         FAN53880_LDO3,
  11         FAN53880_LDO4,
  12         FAN53880_BUCK,
  13         FAN53880_BOOST,
  14 };
  15
  16 enum fan53880_registers {
  17         FAN53880_PRODUCT_ID = 0x00,
  18         FAN53880_SILICON_REV,
  19         FAN53880_BUCKVOUT,
  20         FAN53880_BOOSTVOUT,
  21         FAN53880_LDO1VOUT,
  22         FAN53880_LDO2VOUT,
  23         FAN53880_LDO3VOUT,
  24         FAN53880_LDO4VOUT,
  25         FAN53880_IOUT,
  26         FAN53880_ENABLE,
  27         FAN53880_ENABLE_BOOST,
  28 };
  29
  30 #define FAN53880_ID     0x01
  31
  32 static const struct regulator_ops fan53880_ops = {
  33         .list_voltage = regulator_list_voltage_linear_range,
  34         .map_voltage = regulator_map_voltage_linear_range,
  35         .set_voltage_sel = regulator_set_voltage_sel_regmap,
  36         .get_voltage_sel = regulator_get_voltage_sel_regmap,
  37         .enable = regulator_enable_regmap,
  38         .disable = regulator_disable_regmap,
  39         .is_enabled = regulator_is_enabled_regmap,
  40 };
  41
  42 #define FAN53880_LDO(_num, _supply, _default)                           \
  43         [FAN53880_LDO ## _num] = {                                      \
  44                 .name =            "LDO"#_num,                          \
  45                 .of_match =        "LDO"#_num,          \
  46                 .regulators_node = "regulators",                \
  47                 .type =            REGULATOR_VOLTAGE,                   \
  48                 .owner =           THIS_MODULE,                         \
  49                 .linear_ranges =   (struct linear_range[]) {            \
  50                       REGULATOR_LINEAR_RANGE(_default, 0x0, 0x0, 0),    \
  51                       REGULATOR_LINEAR_RANGE(800000, 0xf, 0x73, 25000), \
  52                 },                                                      \
  53                 .n_linear_ranges = 2,                                   \
  54                 .n_voltages =      0x74,                                \
  55                 .vsel_reg =        FAN53880_LDO ## _num ## VOUT,        \
  56                 .vsel_mask =       0x7f,                                \
  57                 .enable_reg =      FAN53880_ENABLE,                     \
  58                 .enable_mask =     BIT(_num - 1),                       \
  59                 .enable_time =     150,                                 \
  60                 .supply_name =     _supply,                             \
  61                 .ops =             &fan53880_ops,                       \
  62         }
  63
  64 static const struct regulator_desc fan53880_regulators[] = {
  65         FAN53880_LDO(1, "VIN12", 2800000),
  66         FAN53880_LDO(2, "VIN12", 2800000),
  67         FAN53880_LDO(3, "VIN3", 1800000),
  68         FAN53880_LDO(4, "VIN4", 1800000),
  69         [FAN53880_BUCK] = {
  70                 .name =            "BUCK",
  71                 .of_match =        "BUCK",
  72                 .regulators_node = "regulators",
  73                 .type =            REGULATOR_VOLTAGE,
  74                 .owner =           THIS_MODULE,
  75                 .linear_ranges =   (struct linear_range[]) {
  76                       REGULATOR_LINEAR_RANGE(1100000, 0x0, 0x0, 0),
  77                       REGULATOR_LINEAR_RANGE(600000, 0x1f, 0xf7, 12500),
  78                 },
  79                 .n_linear_ranges = 2,
  80                 .n_voltages =      0xf8,
  81                 .vsel_reg =        FAN53880_BUCKVOUT,
  82                 .vsel_mask =       0xff,
  83                 .enable_reg =      FAN53880_ENABLE,
  84                 .enable_mask =     0x10,
  85                 .enable_time =     480,
  86                 .supply_name =     "PVIN",
  87                 .ops =             &fan53880_ops,
  88         },
  89         [FAN53880_BOOST] = {
  90                 .name =            "BOOST",
  91                 .of_match =        "BOOST",
  92                 .regulators_node = "regulators",
  93                 .type =            REGULATOR_VOLTAGE,
  94                 .owner =           THIS_MODULE,
  95                 .linear_ranges =   (struct linear_range[]) {
  96                       REGULATOR_LINEAR_RANGE(5000000, 0x0, 0x0, 0),
  97                       REGULATOR_LINEAR_RANGE(3000000, 0x4, 0x70, 25000),
  98                 },
  99                 .n_linear_ranges = 2,
 100                 .n_voltages =      0x71,
 101                 .vsel_reg =        FAN53880_BOOSTVOUT,
 102                 .vsel_mask =       0x7f,
 103                 .enable_reg =      FAN53880_ENABLE_BOOST,
 104                 .enable_mask =     0xff,
 105                 .enable_time =     580,
 106                 .supply_name =     "PVIN",
 107                 .ops =             &fan53880_ops,
 108         },
 109 };
 110
 111 static const struct regmap_config fan53880_regmap = {
 112         .reg_bits = 8,
 113         .val_bits = 8,
 114         .max_register = FAN53880_ENABLE_BOOST,
 115 };
 116
 117 static int fan53880_i2c_probe(struct i2c_client *i2c)
 118 {
 119         struct regulator_config config = { };
 120         struct regulator_dev *rdev;
 121         struct regmap *regmap;
 122         int i, ret;
 123         unsigned int data;
 124
 125         regmap = devm_regmap_init_i2c(i2c, &fan53880_regmap);
 126         if (IS_ERR(regmap)) {
 127                 ret = PTR_ERR(regmap);
 128                 dev_err(&i2c->dev, "Failed to create regmap: %d\n", ret);
 129                 return ret;
 130         }
 131
 132         ret = regmap_read(regmap, FAN53880_PRODUCT_ID, &data);
 133         if (ret < 0) {
 134                 dev_err(&i2c->dev, "Failed to read PRODUCT_ID: %d\n", ret);
 135                 return ret;
 136         }
 137         if (data != FAN53880_ID) {
 138                 dev_err(&i2c->dev, "Unsupported device id: 0x%x.\n", data);
 139                 return -ENODEV;
 140         }
 141
 142         config.dev = &i2c->dev;
 143         config.init_data = NULL;
 144
 145         for (i = 0; i < ARRAY_SIZE(fan53880_regulators); i++) {
 146                 rdev = devm_regulator_register(&i2c->dev,
 147                                                &fan53880_regulators[i],
 148                                                &config);
 149                 if (IS_ERR(rdev)) {
 150                         ret = PTR_ERR(rdev);
 151                         dev_err(&i2c->dev, "Failed to register %s: %d\n",
 152                                 fan53880_regulators[i].name, ret);
 153                         return ret;
 154                 }
 155         }
 156
 157         return 0;
 158 }
 159
 160 static const struct of_device_id fan53880_dt_ids[] = {
 161         { .compatible = "onnn,fan53880", },
 162         {}
 163 };
 164 MODULE_DEVICE_TABLE(of, fan53880_dt_ids);
 165
 166 static const struct i2c_device_id fan53880_i2c_id[] = {
 167         { "fan53880", },
 168         {}
 169 };
 170 MODULE_DEVICE_TABLE(i2c, fan53880_i2c_id);
 171
 172 static struct i2c_driver fan53880_regulator_driver = {
 173         .driver = {
 174                 .name = "fan53880",
 175                 .probe_type = PROBE_PREFER_ASYNCHRONOUS,
 176                 .of_match_table = fan53880_dt_ids,
 177         },
 178         .probe = fan53880_i2c_probe,
 179         .id_table = fan53880_i2c_id,
 180 };
 181 module_i2c_driver(fan53880_regulator_driver);
 182
 183 MODULE_DESCRIPTION("FAN53880 PMIC voltage regulator driver");
 184 MODULE_AUTHOR("Christoph Fritz <chf.fritz@googlemail.com>");
 185 MODULE_LICENSE("GPL");