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(error: -EINVAL);
31
32 _pdata.leds = kmemdup(p: pdata->leds,
33 size: pdata->num_leds * sizeof(*pdata->leds), GFP_KERNEL);
34 if (!_pdata.leds)
35 return ERR_PTR(error: -ENOMEM);
36
37 ret = platform_device_register_resndata(NULL, name: "leds-gpio", id,
38 NULL, num: 0, data: &_pdata, size: sizeof(_pdata));
39 if (IS_ERR(ptr: ret))
40 kfree(objp: _pdata.leds);
41
42 return ret;
43}
44

source code of linux/drivers/leds/leds-gpio-register.c