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/*
* gpio LED support for barebox
*
* (C) Copyright 2010 Sascha Hauer, Pengutronix
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#include <led.h>
#include <asm/gpio.h>
static void led_gpio_set(struct led *led, unsigned int value)
{
struct gpio_led *gpio_led = container_of(led, struct gpio_led, led);
gpio_direction_output(gpio_led->gpio, !!value ^ gpio_led->active_low);
}
/**
* led_gpio_register - register a gpio controlled LED
* @param led The gpio LED
*
* This function registers a single gpio as a LED. led->gpio
* should be initialized to the gpio to control.
*/
int led_gpio_register(struct gpio_led *led)
{
led->led.set = led_gpio_set;
led->led.max_value = 1;
return led_register(&led->led);
}
/**
* led_gpio_unregister - remove a gpio controlled LED from the framework
* @param led The gpio LED
*/
void led_gpio_unregister(struct gpio_led *led)
{
led_unregister(&led->led);
}
#ifdef CONFIG_LED_GPIO_RGB
static void led_gpio_rgb_set(struct led *led, unsigned int value)
{
struct gpio_rgb_led *rgb = container_of(led, struct gpio_rgb_led, led);
int al = rgb->active_low;
gpio_direction_output(rgb->gpio_r, !!(value & 4) ^ al);
gpio_direction_output(rgb->gpio_g, !!(value & 2) ^ al);
gpio_direction_output(rgb->gpio_b, !!(value & 1) ^ al);
}
/**
* led_gpio_rgb_register - register three gpios as a rgb LED
* @param led The gpio rg LED
*
* This function registers three gpios as a rgb LED. led->gpio[rgb]
* should be initialized to the gpios to control.
*/
int led_gpio_rgb_register(struct gpio_rgb_led *led)
{
led->led.set = led_gpio_rgb_set;
led->led.max_value = 7;
return led_register(&led->led);
}
/**
* led_gpio_rgb_unregister - remove a gpio controlled rgb LED from the framework
* @param led The gpio LED
*/
void led_gpio_rgb_unregister(struct gpio_led *led)
{
led_unregister(&led->led);
}
#endif /* CONFIG_LED_GPIO_RGB */
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