nfsd4: typo logical vs bitwise negate for want_mask
[linux-btrfs-devel.git] / net / rfkill / rfkill-regulator.c
blob18dc512a10f3b5a39886b99e0536c3d2df706f78
1 /*
2 * rfkill-regulator.c - Regulator consumer driver for rfkill
4 * Copyright (C) 2009 Guiming Zhuo <gmzhuo@gmail.com>
5 * Copyright (C) 2011 Antonio Ospite <ospite@studenti.unina.it>
7 * Implementation inspired by leds-regulator driver.
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
15 #include <linux/module.h>
16 #include <linux/err.h>
17 #include <linux/slab.h>
18 #include <linux/platform_device.h>
19 #include <linux/regulator/consumer.h>
20 #include <linux/rfkill.h>
21 #include <linux/rfkill-regulator.h>
23 struct rfkill_regulator_data {
24 struct rfkill *rf_kill;
25 bool reg_enabled;
27 struct regulator *vcc;
30 static int rfkill_regulator_set_block(void *data, bool blocked)
32 struct rfkill_regulator_data *rfkill_data = data;
34 pr_debug("%s: blocked: %d\n", __func__, blocked);
36 if (blocked) {
37 if (rfkill_data->reg_enabled) {
38 regulator_disable(rfkill_data->vcc);
39 rfkill_data->reg_enabled = 0;
41 } else {
42 if (!rfkill_data->reg_enabled) {
43 regulator_enable(rfkill_data->vcc);
44 rfkill_data->reg_enabled = 1;
48 pr_debug("%s: regulator_is_enabled after set_block: %d\n", __func__,
49 regulator_is_enabled(rfkill_data->vcc));
51 return 0;
54 struct rfkill_ops rfkill_regulator_ops = {
55 .set_block = rfkill_regulator_set_block,
58 static int __devinit rfkill_regulator_probe(struct platform_device *pdev)
60 struct rfkill_regulator_platform_data *pdata = pdev->dev.platform_data;
61 struct rfkill_regulator_data *rfkill_data;
62 struct regulator *vcc;
63 struct rfkill *rf_kill;
64 int ret = 0;
66 if (pdata == NULL) {
67 dev_err(&pdev->dev, "no platform data\n");
68 return -ENODEV;
71 if (pdata->name == NULL || pdata->type == 0) {
72 dev_err(&pdev->dev, "invalid name or type in platform data\n");
73 return -EINVAL;
76 vcc = regulator_get_exclusive(&pdev->dev, "vrfkill");
77 if (IS_ERR(vcc)) {
78 dev_err(&pdev->dev, "Cannot get vcc for %s\n", pdata->name);
79 ret = PTR_ERR(vcc);
80 goto out;
83 rfkill_data = kzalloc(sizeof(*rfkill_data), GFP_KERNEL);
84 if (rfkill_data == NULL) {
85 ret = -ENOMEM;
86 goto err_data_alloc;
89 rf_kill = rfkill_alloc(pdata->name, &pdev->dev,
90 pdata->type,
91 &rfkill_regulator_ops, rfkill_data);
92 if (rf_kill == NULL) {
93 dev_err(&pdev->dev, "Cannot alloc rfkill device\n");
94 ret = -ENOMEM;
95 goto err_rfkill_alloc;
98 if (regulator_is_enabled(vcc)) {
99 dev_dbg(&pdev->dev, "Regulator already enabled\n");
100 rfkill_data->reg_enabled = 1;
102 rfkill_data->vcc = vcc;
103 rfkill_data->rf_kill = rf_kill;
105 ret = rfkill_register(rf_kill);
106 if (ret) {
107 dev_err(&pdev->dev, "Cannot register rfkill device\n");
108 goto err_rfkill_register;
111 platform_set_drvdata(pdev, rfkill_data);
112 dev_info(&pdev->dev, "%s initialized\n", pdata->name);
114 return 0;
116 err_rfkill_register:
117 rfkill_destroy(rf_kill);
118 err_rfkill_alloc:
119 kfree(rfkill_data);
120 err_data_alloc:
121 regulator_put(vcc);
122 out:
123 return ret;
126 static int __devexit rfkill_regulator_remove(struct platform_device *pdev)
128 struct rfkill_regulator_data *rfkill_data = platform_get_drvdata(pdev);
129 struct rfkill *rf_kill = rfkill_data->rf_kill;
131 rfkill_unregister(rf_kill);
132 rfkill_destroy(rf_kill);
133 regulator_put(rfkill_data->vcc);
134 kfree(rfkill_data);
136 return 0;
139 static struct platform_driver rfkill_regulator_driver = {
140 .probe = rfkill_regulator_probe,
141 .remove = __devexit_p(rfkill_regulator_remove),
142 .driver = {
143 .name = "rfkill-regulator",
144 .owner = THIS_MODULE,
148 static int __init rfkill_regulator_init(void)
150 return platform_driver_register(&rfkill_regulator_driver);
152 module_init(rfkill_regulator_init);
154 static void __exit rfkill_regulator_exit(void)
156 platform_driver_unregister(&rfkill_regulator_driver);
158 module_exit(rfkill_regulator_exit);
160 MODULE_AUTHOR("Guiming Zhuo <gmzhuo@gmail.com>");
161 MODULE_AUTHOR("Antonio Ospite <ospite@studenti.unina.it>");
162 MODULE_DESCRIPTION("Regulator consumer driver for rfkill");
163 MODULE_LICENSE("GPL");
164 MODULE_ALIAS("platform:rfkill-regulator");