1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0
2*4882a593Smuzhiyun //
3*4882a593Smuzhiyun // sky81452-regulator.c SKY81452 regulator driver
4*4882a593Smuzhiyun //
5*4882a593Smuzhiyun // Copyright 2014 Skyworks Solutions Inc.
6*4882a593Smuzhiyun // Author : Gyungoh Yoo <jack.yoo@skyworksinc.com>
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun #include <linux/module.h>
9*4882a593Smuzhiyun #include <linux/kernel.h>
10*4882a593Smuzhiyun #include <linux/platform_device.h>
11*4882a593Smuzhiyun #include <linux/init.h>
12*4882a593Smuzhiyun #include <linux/err.h>
13*4882a593Smuzhiyun #include <linux/of.h>
14*4882a593Smuzhiyun #include <linux/regulator/driver.h>
15*4882a593Smuzhiyun #include <linux/regulator/of_regulator.h>
16*4882a593Smuzhiyun
17*4882a593Smuzhiyun /* registers */
18*4882a593Smuzhiyun #define SKY81452_REG1 0x01
19*4882a593Smuzhiyun #define SKY81452_REG3 0x03
20*4882a593Smuzhiyun
21*4882a593Smuzhiyun /* bit mask */
22*4882a593Smuzhiyun #define SKY81452_LEN 0x40
23*4882a593Smuzhiyun #define SKY81452_LOUT 0x1F
24*4882a593Smuzhiyun
25*4882a593Smuzhiyun static const struct regulator_ops sky81452_reg_ops = {
26*4882a593Smuzhiyun .list_voltage = regulator_list_voltage_linear_range,
27*4882a593Smuzhiyun .map_voltage = regulator_map_voltage_linear_range,
28*4882a593Smuzhiyun .get_voltage_sel = regulator_get_voltage_sel_regmap,
29*4882a593Smuzhiyun .set_voltage_sel = regulator_set_voltage_sel_regmap,
30*4882a593Smuzhiyun .enable = regulator_enable_regmap,
31*4882a593Smuzhiyun .disable = regulator_disable_regmap,
32*4882a593Smuzhiyun .is_enabled = regulator_is_enabled_regmap,
33*4882a593Smuzhiyun };
34*4882a593Smuzhiyun
35*4882a593Smuzhiyun static const struct linear_range sky81452_reg_ranges[] = {
36*4882a593Smuzhiyun REGULATOR_LINEAR_RANGE(4500000, 0, 14, 250000),
37*4882a593Smuzhiyun REGULATOR_LINEAR_RANGE(9000000, 15, 31, 1000000),
38*4882a593Smuzhiyun };
39*4882a593Smuzhiyun
40*4882a593Smuzhiyun static const struct regulator_desc sky81452_reg = {
41*4882a593Smuzhiyun .name = "LOUT",
42*4882a593Smuzhiyun .of_match = of_match_ptr("lout"),
43*4882a593Smuzhiyun .regulators_node = of_match_ptr("regulator"),
44*4882a593Smuzhiyun .ops = &sky81452_reg_ops,
45*4882a593Smuzhiyun .type = REGULATOR_VOLTAGE,
46*4882a593Smuzhiyun .owner = THIS_MODULE,
47*4882a593Smuzhiyun .n_voltages = SKY81452_LOUT + 1,
48*4882a593Smuzhiyun .linear_ranges = sky81452_reg_ranges,
49*4882a593Smuzhiyun .n_linear_ranges = ARRAY_SIZE(sky81452_reg_ranges),
50*4882a593Smuzhiyun .vsel_reg = SKY81452_REG3,
51*4882a593Smuzhiyun .vsel_mask = SKY81452_LOUT,
52*4882a593Smuzhiyun .enable_reg = SKY81452_REG1,
53*4882a593Smuzhiyun .enable_mask = SKY81452_LEN,
54*4882a593Smuzhiyun };
55*4882a593Smuzhiyun
sky81452_reg_probe(struct platform_device * pdev)56*4882a593Smuzhiyun static int sky81452_reg_probe(struct platform_device *pdev)
57*4882a593Smuzhiyun {
58*4882a593Smuzhiyun struct device *dev = &pdev->dev;
59*4882a593Smuzhiyun const struct regulator_init_data *init_data = dev_get_platdata(dev);
60*4882a593Smuzhiyun struct regulator_config config = { };
61*4882a593Smuzhiyun struct regulator_dev *rdev;
62*4882a593Smuzhiyun
63*4882a593Smuzhiyun config.dev = dev->parent;
64*4882a593Smuzhiyun config.init_data = init_data;
65*4882a593Smuzhiyun config.of_node = dev->of_node;
66*4882a593Smuzhiyun config.regmap = dev_get_drvdata(dev->parent);
67*4882a593Smuzhiyun
68*4882a593Smuzhiyun rdev = devm_regulator_register(dev, &sky81452_reg, &config);
69*4882a593Smuzhiyun if (IS_ERR(rdev)) {
70*4882a593Smuzhiyun dev_err(dev, "failed to register. err=%ld\n", PTR_ERR(rdev));
71*4882a593Smuzhiyun return PTR_ERR(rdev);
72*4882a593Smuzhiyun }
73*4882a593Smuzhiyun
74*4882a593Smuzhiyun platform_set_drvdata(pdev, rdev);
75*4882a593Smuzhiyun
76*4882a593Smuzhiyun return 0;
77*4882a593Smuzhiyun }
78*4882a593Smuzhiyun
79*4882a593Smuzhiyun static struct platform_driver sky81452_reg_driver = {
80*4882a593Smuzhiyun .driver = {
81*4882a593Smuzhiyun .name = "sky81452-regulator",
82*4882a593Smuzhiyun },
83*4882a593Smuzhiyun .probe = sky81452_reg_probe,
84*4882a593Smuzhiyun };
85*4882a593Smuzhiyun
86*4882a593Smuzhiyun module_platform_driver(sky81452_reg_driver);
87*4882a593Smuzhiyun
88*4882a593Smuzhiyun MODULE_DESCRIPTION("Skyworks SKY81452 Regulator driver");
89*4882a593Smuzhiyun MODULE_AUTHOR("Gyungoh Yoo <jack.yoo@skyworksinc.com>");
90*4882a593Smuzhiyun MODULE_LICENSE("GPL v2");
91