1/*
2 * Copyright (C) 2011 Pengutronix
3 * Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de>
4 *
5 * This program is free software; you can redistribute it and/or modify it under
6 * the terms of the GNU General Public License version 2 as published by the
7 * Free Software Foundation.
8 */
9#include <linux/err.h>
10#include <linux/leds.h>
11#include <linux/platform_device.h>
12#include <linux/slab.h>
13
14/**
15 * gpio_led_register_device - register a gpio-led device
16 * @pdata: the platform data used for the new device
17 *
18 * Makes a copy of pdata and pdata->leds and registers a new leds-gpio device
19 * with the result. This allows to have pdata and pdata-leds in .init.rodata
20 * and so saves some bytes compared to a static struct platform_device with
21 * static platform data.
22 *
23 * Returns the registered device or an error pointer.
24 */
25struct platform_device *__init gpio_led_register_device(
26		int id, const struct gpio_led_platform_data *pdata)
27{
28	struct platform_device *ret;
29	struct gpio_led_platform_data _pdata = *pdata;
30
31	if (!pdata->num_leds)
32		return ERR_PTR(-EINVAL);
33
34	_pdata.leds = kmemdup(pdata->leds,
35			pdata->num_leds * sizeof(*pdata->leds), GFP_KERNEL);
36	if (!_pdata.leds)
37		return ERR_PTR(-ENOMEM);
38
39	ret = platform_device_register_resndata(NULL, "leds-gpio", id,
40			NULL, 0, &_pdata, sizeof(_pdata));
41	if (IS_ERR(ret))
42		kfree(_pdata.leds);
43
44	return ret;
45}
46