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
sky81452_reg_probe(struct platform_device * pdev)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 },
83 .probe = sky81452_reg_probe,
84 };
85
86 module_platform_driver(sky81452_reg_driver);
87
88 MODULE_DESCRIPTION("Skyworks SKY81452 Regulator driver");
89 MODULE_AUTHOR("Gyungoh Yoo <jack.yoo@skyworksinc.com>");
90 MODULE_LICENSE("GPL v2");
91
