net/mlx4_en: Fix mixed PFC and Global pause user control requests
[pandora-kernel.git] / net / rfkill / rfkill-regulator.c
1 /*
2  * rfkill-regulator.c - Regulator consumer driver for rfkill
3  *
4  * Copyright (C) 2009  Guiming Zhuo <gmzhuo@gmail.com>
5  * Copyright (C) 2011  Antonio Ospite <ospite@studenti.unina.it>
6  *
7  * Implementation inspired by leds-regulator driver.
8  *
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.
12  *
13  */
14
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>
22
23 struct rfkill_regulator_data {
24         struct rfkill *rf_kill;
25         bool reg_enabled;
26
27         struct regulator *vcc;
28 };
29
30 static int rfkill_regulator_set_block(void *data, bool blocked)
31 {
32         struct rfkill_regulator_data *rfkill_data = data;
33
34         pr_debug("%s: blocked: %d\n", __func__, blocked);
35
36         if (blocked) {
37                 if (rfkill_data->reg_enabled) {
38                         regulator_disable(rfkill_data->vcc);
39                         rfkill_data->reg_enabled = 0;
40                 }
41         } else {
42                 if (!rfkill_data->reg_enabled) {
43                         regulator_enable(rfkill_data->vcc);
44                         rfkill_data->reg_enabled = 1;
45                 }
46         }
47
48         pr_debug("%s: regulator_is_enabled after set_block: %d\n", __func__,
49                 regulator_is_enabled(rfkill_data->vcc));
50
51         return 0;
52 }
53
54 struct rfkill_ops rfkill_regulator_ops = {
55         .set_block = rfkill_regulator_set_block,
56 };
57
58 static int __devinit rfkill_regulator_probe(struct platform_device *pdev)
59 {
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;
65
66         if (pdata == NULL) {
67                 dev_err(&pdev->dev, "no platform data\n");
68                 return -ENODEV;
69         }
70
71         if (pdata->name == NULL || pdata->type == 0) {
72                 dev_err(&pdev->dev, "invalid name or type in platform data\n");
73                 return -EINVAL;
74         }
75
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;
81         }
82
83         rfkill_data = kzalloc(sizeof(*rfkill_data), GFP_KERNEL);
84         if (rfkill_data == NULL) {
85                 ret = -ENOMEM;
86                 goto err_data_alloc;
87         }
88
89         rf_kill = rfkill_alloc(pdata->name, &pdev->dev,
90                                 pdata->type,
91                                 &rfkill_regulator_ops, rfkill_data);
92         if (rf_kill == NULL) {
93                 ret = -ENOMEM;
94                 goto err_rfkill_alloc;
95         }
96
97         if (regulator_is_enabled(vcc)) {
98                 dev_dbg(&pdev->dev, "Regulator already enabled\n");
99                 rfkill_data->reg_enabled = 1;
100         }
101         rfkill_data->vcc = vcc;
102         rfkill_data->rf_kill = rf_kill;
103
104         ret = rfkill_register(rf_kill);
105         if (ret) {
106                 dev_err(&pdev->dev, "Cannot register rfkill device\n");
107                 goto err_rfkill_register;
108         }
109
110         platform_set_drvdata(pdev, rfkill_data);
111         dev_info(&pdev->dev, "%s initialized\n", pdata->name);
112
113         return 0;
114
115 err_rfkill_register:
116         rfkill_destroy(rf_kill);
117 err_rfkill_alloc:
118         kfree(rfkill_data);
119 err_data_alloc:
120         regulator_put(vcc);
121 out:
122         return ret;
123 }
124
125 static int __devexit rfkill_regulator_remove(struct platform_device *pdev)
126 {
127         struct rfkill_regulator_data *rfkill_data = platform_get_drvdata(pdev);
128         struct rfkill *rf_kill = rfkill_data->rf_kill;
129
130         rfkill_unregister(rf_kill);
131         rfkill_destroy(rf_kill);
132         regulator_put(rfkill_data->vcc);
133         kfree(rfkill_data);
134
135         return 0;
136 }
137
138 static struct platform_driver rfkill_regulator_driver = {
139         .probe = rfkill_regulator_probe,
140         .remove = __devexit_p(rfkill_regulator_remove),
141         .driver = {
142                 .name = "rfkill-regulator",
143                 .owner = THIS_MODULE,
144         },
145 };
146
147 static int __init rfkill_regulator_init(void)
148 {
149         return platform_driver_register(&rfkill_regulator_driver);
150 }
151 module_init(rfkill_regulator_init);
152
153 static void __exit rfkill_regulator_exit(void)
154 {
155         platform_driver_unregister(&rfkill_regulator_driver);
156 }
157 module_exit(rfkill_regulator_exit);
158
159 MODULE_AUTHOR("Guiming Zhuo <gmzhuo@gmail.com>");
160 MODULE_AUTHOR("Antonio Ospite <ospite@studenti.unina.it>");
161 MODULE_DESCRIPTION("Regulator consumer driver for rfkill");
162 MODULE_LICENSE("GPL");
163 MODULE_ALIAS("platform:rfkill-regulator");