1 /* 2 * Copyright (C) 2011 Pengutronix 3 * Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de> 4 * 5 * This program is free software; you can redistribute it and/or modify it under 6 * the terms of the GNU General Public License version 2 as published by the 7 * Free Software Foundation. 8 */ 9 #include <linux/err.h> 10 #include <linux/leds.h> 11 #include <linux/platform_device.h> 12 #include <linux/slab.h> 13 14 /** 15 * gpio_led_register_device - register a gpio-led device 16 * @pdata: the platform data used for the new device 17 * 18 * Makes a copy of pdata and pdata->leds and registers a new leds-gpio device 19 * with the result. This allows to have pdata and pdata-leds in .init.rodata 20 * and so saves some bytes compared to a static struct platform_device with 21 * static platform data. 22 * 23 * Returns the registered device or an error pointer. 24 */ 25 struct platform_device *__init gpio_led_register_device( 26 int id, const struct gpio_led_platform_data *pdata) 27 { 28 struct platform_device *ret; 29 struct gpio_led_platform_data _pdata = *pdata; 30 31 if (!pdata->num_leds) 32 return ERR_PTR(-EINVAL); 33 34 _pdata.leds = kmemdup(pdata->leds, 35 pdata->num_leds * sizeof(*pdata->leds), GFP_KERNEL); 36 if (!_pdata.leds) 37 return ERR_PTR(-ENOMEM); 38 39 ret = platform_device_register_resndata(NULL, "leds-gpio", id, 40 NULL, 0, &_pdata, sizeof(_pdata)); 41 if (IS_ERR(ret)) 42 kfree(_pdata.leds); 43 44 return ret; 45 } 46