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 		.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");
92