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 | |
25 | static 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 | |
35 | static 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 | |
40 | static 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 | |
56 | static 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: dev->parent); |
67 | |
68 | rdev = devm_regulator_register(dev, regulator_desc: &sky81452_reg, config: &config); |
69 | if (IS_ERR(ptr: rdev)) { |
70 | dev_err(dev, "failed to register. err=%ld\n" , PTR_ERR(rdev)); |
71 | return PTR_ERR(ptr: rdev); |
72 | } |
73 | |
74 | platform_set_drvdata(pdev, data: rdev); |
75 | |
76 | return 0; |
77 | } |
78 | |
79 | static 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 | |
87 | module_platform_driver(sky81452_reg_driver); |
88 | |
89 | MODULE_DESCRIPTION("Skyworks SKY81452 Regulator driver" ); |
90 | MODULE_AUTHOR("Gyungoh Yoo <jack.yoo@skyworksinc.com>" ); |
91 | MODULE_LICENSE("GPL v2" ); |
92 | |