Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma
[linux-2.6-microblaze.git] / drivers / regulator / sky81452-regulator.c
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
37 static 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
47 static 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
52 static 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
68 static 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
91 static struct platform_driver sky81452_reg_driver = {
92         .driver = {
93                 .name = "sky81452-regulator",
94         },
95         .probe = sky81452_reg_probe,
96 };
97
98 module_platform_driver(sky81452_reg_driver);
99
100 MODULE_DESCRIPTION("Skyworks SKY81452 Regulator driver");
101 MODULE_AUTHOR("Gyungoh Yoo <jack.yoo@skyworksinc.com>");
102 MODULE_LICENSE("GPL v2");