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