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 */ 23 struct 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 } 44