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