1// SPDX-License-Identifier: GPL-2.0-only
 2/*
 3 * Copyright (C) 2011 Pengutronix
 4 * Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de>
 
 
 
 
 5 */
 6#include <linux/err.h>
 7#include <linux/leds.h>
 8#include <linux/platform_device.h>
 9#include <linux/slab.h>
 
10
11/**
12 * gpio_led_register_device - register a gpio-led device
13 * @pdata: the platform data used for the new device
14 * @id: platform ID
15 *
16 * Makes a copy of pdata and pdata->leds and registers a new leds-gpio device
17 * with the result. This allows to have pdata and pdata-leds in .init.rodata
18 * and so saves some bytes compared to a static struct platform_device with
19 * static platform data.
20 *
21 * Returns the registered device or an error pointer.
22 */
23struct platform_device *__init gpio_led_register_device(
24		int id, const struct gpio_led_platform_data *pdata)
25{
26	struct platform_device *ret;
27	struct gpio_led_platform_data _pdata = *pdata;
28
29	if (!pdata->num_leds)
30		return ERR_PTR(-EINVAL);
31
32	_pdata.leds = kmemdup(pdata->leds,
33			pdata->num_leds * sizeof(*pdata->leds), GFP_KERNEL);
34	if (!_pdata.leds)
35		return ERR_PTR(-ENOMEM);
36
37	ret = platform_device_register_resndata(NULL, "leds-gpio", id,
38			NULL, 0, &_pdata, sizeof(_pdata));
39	if (IS_ERR(ret))
40		kfree(_pdata.leds);
41
42	return ret;
43}

 
 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/platform_device.h>
11#include <linux/slab.h>
12#include <linux/leds.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	_pdata.leds = kmemdup(pdata->leds,
32			pdata->num_leds * sizeof(*pdata->leds), GFP_KERNEL);
33	if (!_pdata.leds)
34		return ERR_PTR(-ENOMEM);
35
36	ret = platform_device_register_resndata(NULL, "leds-gpio", id,
37			NULL, 0, &_pdata, sizeof(_pdata));
38	if (IS_ERR(ret))
39		kfree(_pdata.leds);
40
41	return ret;
42}