drivers/regulator/sky81452-regulator.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 //
   3 // sky81452-regulator.c SKY81452 regulator driver
   4 //
   5 // Copyright 2014 Skyworks Solutions Inc.
   6 // Author : Gyungoh Yoo <jack.yoo@skyworksinc.com>
   7
   8 #include <linux/module.h>
   9 #include <linux/kernel.h>
  10 #include <linux/platform_device.h>
  11 #include <linux/init.h>
  12 #include <linux/err.h>
  13 #include <linux/of.h>
  14 #include <linux/regulator/driver.h>
  15 #include <linux/regulator/of_regulator.h>
  16
  17 /* registers */
  18 #define SKY81452_REG1   0x01
  19 #define SKY81452_REG3   0x03
  20
  21 /* bit mask */
  22 #define SKY81452_LEN    0x40
  23 #define SKY81452_LOUT   0x1F
  24
  25 static const struct regulator_ops sky81452_reg_ops = {
  26         .list_voltage = regulator_list_voltage_linear_range,
  27         .map_voltage = regulator_map_voltage_linear_range,
  28         .get_voltage_sel = regulator_get_voltage_sel_regmap,
  29         .set_voltage_sel = regulator_set_voltage_sel_regmap,
  30         .enable = regulator_enable_regmap,
  31         .disable = regulator_disable_regmap,
  32         .is_enabled = regulator_is_enabled_regmap,
  33 };
  34
  35 static const struct linear_range sky81452_reg_ranges[] = {
  36         REGULATOR_LINEAR_RANGE(4500000, 0, 14, 250000),
  37         REGULATOR_LINEAR_RANGE(9000000, 15, 31, 1000000),
  38 };
  39
  40 static const struct regulator_desc sky81452_reg = {
  41         .name = "LOUT",
  42         .of_match = of_match_ptr("lout"),
  43         .regulators_node = of_match_ptr("regulator"),
  44         .ops = &sky81452_reg_ops,
  45         .type = REGULATOR_VOLTAGE,
  46         .owner = THIS_MODULE,
  47         .n_voltages = SKY81452_LOUT + 1,
  48         .linear_ranges = sky81452_reg_ranges,
  49         .n_linear_ranges = ARRAY_SIZE(sky81452_reg_ranges),
  50         .vsel_reg = SKY81452_REG3,
  51         .vsel_mask = SKY81452_LOUT,
  52         .enable_reg = SKY81452_REG1,
  53         .enable_mask = SKY81452_LEN,
  54 };
  55
  56 static int sky81452_reg_probe(struct platform_device *pdev)
  57 {
  58         struct device *dev = &pdev->dev;
  59         const struct regulator_init_data *init_data = dev_get_platdata(dev);
  60         struct regulator_config config = { };
  61         struct regulator_dev *rdev;
  62
  63         config.dev = dev->parent;
  64         config.init_data = init_data;
  65         config.of_node = dev->of_node;
  66         config.regmap = dev_get_drvdata(dev->parent);
  67
  68         rdev = devm_regulator_register(dev, &sky81452_reg, &config);
  69         if (IS_ERR(rdev)) {
  70                 dev_err(dev, "failed to register. err=%ld\n", PTR_ERR(rdev));
  71                 return PTR_ERR(rdev);
  72         }
  73
  74         platform_set_drvdata(pdev, rdev);
  75
  76         return 0;
  77 }
  78
  79 static struct platform_driver sky81452_reg_driver = {
  80         .driver = {
  81                 .name = "sky81452-regulator",
  82                 .probe_type = PROBE_PREFER_ASYNCHRONOUS,
  83         },
  84         .probe = sky81452_reg_probe,
  85 };
  86
  87 module_platform_driver(sky81452_reg_driver);
  88
  89 MODULE_DESCRIPTION("Skyworks SKY81452 Regulator driver");
  90 MODULE_AUTHOR("Gyungoh Yoo <jack.yoo@skyworksinc.com>");
  91 MODULE_LICENSE("GPL v2");