Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
[linux-2.6.git] / drivers / platform / x86 / xo1-rfkill.c
1 /*
2  * Support for rfkill through the OLPC XO-1 laptop embedded controller
3  *
4  * Copyright (C) 2010 One Laptop per Child
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; either version 2 of the License, or
9  * (at your option) any later version.
10  */
11
12 #include <linux/module.h>
13 #include <linux/platform_device.h>
14 #include <linux/rfkill.h>
15
16 #include <asm/olpc.h>
17
18 static int rfkill_set_block(void *data, bool blocked)
19 {
20         unsigned char cmd;
21         if (blocked)
22                 cmd = EC_WLAN_ENTER_RESET;
23         else
24                 cmd = EC_WLAN_LEAVE_RESET;
25
26         return olpc_ec_cmd(cmd, NULL, 0, NULL, 0);
27 }
28
29 static const struct rfkill_ops rfkill_ops = {
30         .set_block = rfkill_set_block,
31 };
32
33 static int __devinit xo1_rfkill_probe(struct platform_device *pdev)
34 {
35         struct rfkill *rfk;
36         int r;
37
38         rfk = rfkill_alloc(pdev->name, &pdev->dev, RFKILL_TYPE_WLAN,
39                            &rfkill_ops, NULL);
40         if (!rfk)
41                 return -ENOMEM;
42
43         r = rfkill_register(rfk);
44         if (r) {
45                 rfkill_destroy(rfk);
46                 return r;
47         }
48
49         platform_set_drvdata(pdev, rfk);
50         return 0;
51 }
52
53 static int __devexit xo1_rfkill_remove(struct platform_device *pdev)
54 {
55         struct rfkill *rfk = platform_get_drvdata(pdev);
56         rfkill_unregister(rfk);
57         rfkill_destroy(rfk);
58         return 0;
59 }
60
61 static struct platform_driver xo1_rfkill_driver = {
62         .driver = {
63                 .name = "xo1-rfkill",
64                 .owner = THIS_MODULE,
65         },
66         .probe          = xo1_rfkill_probe,
67         .remove         = __devexit_p(xo1_rfkill_remove),
68 };
69
70 static int __init xo1_rfkill_init(void)
71 {
72         return platform_driver_register(&xo1_rfkill_driver);
73 }
74
75 static void __exit xo1_rfkill_exit(void)
76 {
77         platform_driver_unregister(&xo1_rfkill_driver);
78 }
79
80 MODULE_AUTHOR("Daniel Drake <dsd@laptop.org>");
81 MODULE_LICENSE("GPL");
82 MODULE_ALIAS("platform:xo1-rfkill");
83
84 module_init(xo1_rfkill_init);
85 module_exit(xo1_rfkill_exit);