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
17void __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
52err_put_pdev:
53	platform_device_put(pdev);
54
55err_free_buttons:
56	kfree(p);
57}
58