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
25static 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
35static 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
40static 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
56static 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
79static 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
87module_platform_driver(sky81452_reg_driver);
88
89MODULE_DESCRIPTION("Skyworks SKY81452 Regulator driver");
90MODULE_AUTHOR("Gyungoh Yoo <jack.yoo@skyworksinc.com>");
91MODULE_LICENSE("GPL v2");
92