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  *
15  * Makes a copy of pdata and pdata->leds and registers a new leds-gpio device
16  * with the result. This allows to have pdata and pdata-leds in .init.rodata
17  * and so saves some bytes compared to a static struct platform_device with
18  * static platform data.
19  *
20  * Returns the registered device or an error pointer.
21  */
22 struct platform_device *__init gpio_led_register_device(
23 		int id, const struct gpio_led_platform_data *pdata)
24 {
25 	struct platform_device *ret;
26 	struct gpio_led_platform_data _pdata = *pdata;
27 
28 	if (!pdata->num_leds)
29 		return ERR_PTR(-EINVAL);
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 }
43