// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (C) 2011 Pengutronix
 * Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de>
 */
#include <linux/err.h>
#include <linux/leds.h>
#include <linux/platform_device.h>
#include <linux/slab.h>

/**
 * gpio_led_register_device - register a gpio-led device
 * @id: platform ID
 * @pdata: the platform data used for the new device
 *
 * Makes a copy of pdata and pdata->leds and registers a new leds-gpio device
 * with the result. This allows to have pdata and pdata-leds in .init.rodata
 * and so saves some bytes compared to a static struct platform_device with
 * static platform data.
 *
 * Returns the registered device or an error pointer.
 */
struct platform_device *__init gpio_led_register_device(
                int id, const struct gpio_led_platform_data *pdata)
{
        struct platform_device *ret;
        struct gpio_led_platform_data _pdata = *pdata;

        if (!pdata->num_leds)
                return ERR_PTR(-EINVAL);

        _pdata.leds = kmemdup(pdata->leds,
                        pdata->num_leds * sizeof(*pdata->leds), GFP_KERNEL);
        if (!_pdata.leds)
                return ERR_PTR(-ENOMEM);

        ret = platform_device_register_resndata(NULL, "leds-gpio", id,
                        NULL, 0, &_pdata, sizeof(_pdata));
        if (IS_ERR(ret))
                kfree(_pdata.leds);

        return ret;
}