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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 | |
586b1514 GY |
8 | * under the terms of the GNU General Public License version 2 |
9 | * as published by the Free Software Foundation. | |
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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", | |
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54 | .of_match = of_match_ptr("lout"), |
55 | .regulators_node = of_match_ptr("regulator"), | |
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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 | ||
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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 | ||
586b1514 | 75 | config.dev = dev->parent; |
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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); | |
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81 | if (IS_ERR(rdev)) { |
82 | dev_err(dev, "failed to register. err=%ld\n", PTR_ERR(rdev)); | |
9839d627 | 83 | return PTR_ERR(rdev); |
586b1514 | 84 | } |
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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>"); | |
586b1514 | 102 | MODULE_LICENSE("GPL v2"); |