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