drivers/regulator/88pg86x.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <linux/module.h>
   3 #include <linux/i2c.h>
   4 #include <linux/of.h>
   5 #include <linux/regulator/driver.h>
   6 #include <linux/regmap.h>
   7
   8 static const struct regulator_ops pg86x_ops = {
   9         .set_voltage_sel = regulator_set_voltage_sel_regmap,
  10         .get_voltage_sel = regulator_get_voltage_sel_regmap,
  11         .list_voltage = regulator_list_voltage_linear_range,
  12 };
  13
  14 static const struct regulator_linear_range pg86x_buck1_ranges[] = {
  15         REGULATOR_LINEAR_RANGE(      0,  0, 10,     0),
  16         REGULATOR_LINEAR_RANGE(1000000, 11, 34, 25000),
  17         REGULATOR_LINEAR_RANGE(1600000, 35, 47, 50000),
  18 };
  19
  20 static const struct regulator_linear_range pg86x_buck2_ranges[] = {
  21         REGULATOR_LINEAR_RANGE(      0,  0, 15,     0),
  22         REGULATOR_LINEAR_RANGE(1000000, 16, 39, 25000),
  23         REGULATOR_LINEAR_RANGE(1600000, 40, 52, 50000),
  24 };
  25
  26 static const struct regulator_desc pg86x_regulators[] = {
  27         {
  28                 .id = 0,
  29                 .type = REGULATOR_VOLTAGE,
  30                 .name = "buck1",
  31                 .of_match = of_match_ptr("buck1"),
  32                 .n_voltages = 11 + 24 + 13,
  33                 .linear_ranges = pg86x_buck1_ranges,
  34                 .n_linear_ranges = 3,
  35                 .vsel_reg  = 0x24,
  36                 .vsel_mask = 0xff,
  37                 .ops = &pg86x_ops,
  38                 .owner = THIS_MODULE
  39         },
  40         {
  41                 .id = 1,
  42                 .type = REGULATOR_VOLTAGE,
  43                 .name = "buck2",
  44                 .of_match = of_match_ptr("buck2"),
  45                 .n_voltages = 16 + 24 + 13,
  46                 .linear_ranges = pg86x_buck2_ranges,
  47                 .n_linear_ranges = 3,
  48                 .vsel_reg  = 0x13,
  49                 .vsel_mask = 0xff,
  50                 .ops = &pg86x_ops,
  51                 .owner = THIS_MODULE
  52         },
  53 };
  54
  55 static const struct regmap_config pg86x_regmap = {
  56         .reg_bits = 8,
  57         .val_bits = 8,
  58 };
  59
  60 static int pg86x_i2c_probe(struct i2c_client *i2c)
  61 {
  62         int id, ret;
  63         struct regulator_config config = {.dev = &i2c->dev};
  64         struct regmap *regmap = devm_regmap_init_i2c(i2c, &pg86x_regmap);
  65
  66         if (IS_ERR(regmap)) {
  67                 ret = PTR_ERR(regmap);
  68                 dev_err(&i2c->dev, "regmap init failed: %d\n", ret);
  69                 return ret;
  70         }
  71
  72         for (id = 0; id < ARRAY_SIZE(pg86x_regulators); id++) {
  73                 struct regulator_dev *rdev;
  74                 rdev = devm_regulator_register(&i2c->dev,
  75                                                &pg86x_regulators[id],
  76                                                &config);
  77                 if (IS_ERR(rdev)) {
  78                         ret = PTR_ERR(rdev);
  79                         dev_err(&i2c->dev, "failed to register %s: %d\n",
  80                                 pg86x_regulators[id].name, ret);
  81                         return ret;
  82                 }
  83         }
  84         return 0;
  85 }
  86
  87 static const struct of_device_id pg86x_dt_ids [] = {
  88         { .compatible = "marvell,88pg867" },
  89         { .compatible = "marvell,88pg868" },
  90         { }
  91 };
  92 MODULE_DEVICE_TABLE(of, pg86x_dt_ids);
  93
  94 static const struct i2c_device_id pg86x_i2c_id[] = {
  95         { "88pg867", },
  96         { "88pg868", },
  97         { }
  98 };
  99 MODULE_DEVICE_TABLE(i2c, pg86x_i2c_id);
 100
 101 static struct i2c_driver pg86x_regulator_driver = {
 102         .driver = {
 103                 .name = "88pg86x",
 104                 .of_match_table = of_match_ptr(pg86x_dt_ids),
 105         },
 106         .probe_new = pg86x_i2c_probe,
 107         .id_table = pg86x_i2c_id,
 108 };
 109
 110 module_i2c_driver(pg86x_regulator_driver);
 111
 112 MODULE_DESCRIPTION("Marvell 88PG86X voltage regulator");
 113 MODULE_AUTHOR("Alexander Monakov <amonakov@gmail.com>");
 114 MODULE_LICENSE("GPL");