1/*
2 * sky81452-regulator.c	SKY81452 regulator driver
3 *
4 * Copyright 2014 Skyworks Solutions Inc.
5 * Author : Gyungoh Yoo <jack.yoo@skyworksinc.com>
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License version 2
9 * as published by the Free Software Foundation.
10 *
11 * This program is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14 * General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License along
17 * with this program; if not, see <http://www.gnu.org/licenses/>.
18 */
19
20#include <linux/module.h>
21#include <linux/kernel.h>
22#include <linux/platform_device.h>
23#include <linux/init.h>
24#include <linux/err.h>
25#include <linux/of.h>
26#include <linux/regulator/driver.h>
27#include <linux/regulator/of_regulator.h>
28
29/* registers */
30#define SKY81452_REG1	0x01
31#define SKY81452_REG3	0x03
32
33/* bit mask */
34#define SKY81452_LEN	0x40
35#define SKY81452_LOUT	0x1F
36
37static struct regulator_ops sky81452_reg_ops = {
38	.list_voltage = regulator_list_voltage_linear_range,
39	.map_voltage = regulator_map_voltage_linear_range,
40	.get_voltage_sel = regulator_get_voltage_sel_regmap,
41	.set_voltage_sel = regulator_set_voltage_sel_regmap,
42	.enable = regulator_enable_regmap,
43	.disable = regulator_disable_regmap,
44	.is_enabled = regulator_is_enabled_regmap,
45};
46
47static const struct regulator_linear_range sky81452_reg_ranges[] = {
48	REGULATOR_LINEAR_RANGE(4500000, 0, 14, 250000),
49	REGULATOR_LINEAR_RANGE(9000000, 15, 31, 1000000),
50};
51
52static const struct regulator_desc sky81452_reg = {
53	.name = "LOUT",
54	.of_match = of_match_ptr("lout"),
55	.regulators_node = of_match_ptr("regulator"),
56	.ops = &sky81452_reg_ops,
57	.type = REGULATOR_VOLTAGE,
58	.owner = THIS_MODULE,
59	.n_voltages = SKY81452_LOUT + 1,
60	.linear_ranges = sky81452_reg_ranges,
61	.n_linear_ranges = ARRAY_SIZE(sky81452_reg_ranges),
62	.vsel_reg = SKY81452_REG3,
63	.vsel_mask = SKY81452_LOUT,
64	.enable_reg = SKY81452_REG1,
65	.enable_mask = SKY81452_LEN,
66};
67
68static int sky81452_reg_probe(struct platform_device *pdev)
69{
70	struct device *dev = &pdev->dev;
71	const struct regulator_init_data *init_data = dev_get_platdata(dev);
72	struct regulator_config config = { };
73	struct regulator_dev *rdev;
74
75	config.dev = dev->parent;
76	config.init_data = init_data;
77	config.of_node = dev->of_node;
78	config.regmap = dev_get_drvdata(dev->parent);
79
80	rdev = devm_regulator_register(dev, &sky81452_reg, &config);
81	if (IS_ERR(rdev)) {
82		dev_err(dev, "failed to register. err=%ld\n", PTR_ERR(rdev));
83		return PTR_ERR(rdev);
84	}
85
86	platform_set_drvdata(pdev, rdev);
87
88	return 0;
89}
90
91static struct platform_driver sky81452_reg_driver = {
92	.driver = {
93		.name = "sky81452-regulator",
94	},
95	.probe = sky81452_reg_probe,
96};
97
98module_platform_driver(sky81452_reg_driver);
99
100MODULE_DESCRIPTION("Skyworks SKY81452 Regulator driver");
101MODULE_AUTHOR("Gyungoh Yoo <jack.yoo@skyworksinc.com>");
102MODULE_LICENSE("GPL v2");
103