1 /*
2 * Atheros AR71XX/AR724X/AR913X GPIO button support
3 *
4 * Copyright (C) 2008-2010 Gabor Juhos <juhosg@openwrt.org>
5 * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License version 2 as published
9 * by the Free Software Foundation.
10 */
11
12 #include "linux/init.h"
13 #include "linux/slab.h"
14 #include <linux/platform_device.h>
15
16 #include "dev-gpio-buttons.h"
17
ath79_register_gpio_keys_polled(int id,unsigned poll_interval,unsigned nbuttons,struct gpio_keys_button * buttons)18 void __init ath79_register_gpio_keys_polled(int id,
19 unsigned poll_interval,
20 unsigned nbuttons,
21 struct gpio_keys_button *buttons)
22 {
23 struct platform_device *pdev;
24 struct gpio_keys_platform_data pdata;
25 struct gpio_keys_button *p;
26 int err;
27
28 p = kmalloc(nbuttons * sizeof(*p), GFP_KERNEL);
29 if (!p)
30 return;
31
32 memcpy(p, buttons, nbuttons * sizeof(*p));
33
34 pdev = platform_device_alloc("gpio-keys-polled", id);
35 if (!pdev)
36 goto err_free_buttons;
37
38 memset(&pdata, 0, sizeof(pdata));
39 pdata.poll_interval = poll_interval;
40 pdata.nbuttons = nbuttons;
41 pdata.buttons = p;
42
43 err = platform_device_add_data(pdev, &pdata, sizeof(pdata));
44 if (err)
45 goto err_put_pdev;
46
47 err = platform_device_add(pdev);
48 if (err)
49 goto err_put_pdev;
50
51 return;
52
53 err_put_pdev:
54 platform_device_put(pdev);
55
56 err_free_buttons:
57 kfree(p);
58 }
59