gpio_led.c
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/*
* Status LED driver based on GPIO access conventions of Linux
*
* Copyright (C) 2010 Thomas Chou <thomas@wytron.com.tw>
* Licensed under the GPL-2 or later.
*/
#include <common.h>
#include <status_led.h>
#include <asm/gpio.h>
#ifndef CONFIG_GPIO_LED_INVERTED_TABLE
#define CONFIG_GPIO_LED_INVERTED_TABLE {}
#endif
static led_id_t gpio_led_inv[] = CONFIG_GPIO_LED_INVERTED_TABLE;
static int gpio_led_gpio_value(led_id_t mask, int state)
{
int i, gpio_value = (state == CONFIG_LED_STATUS_ON);
for (i = 0; i < ARRAY_SIZE(gpio_led_inv); i++) {
if (gpio_led_inv[i] == mask)
gpio_value = !gpio_value;
}
return gpio_value;
}
void __led_init(led_id_t mask, int state)
{
int gpio_value;
if (gpio_request(mask, "gpio_led") != 0) {
printf("%s: failed requesting GPIO%lu!\n", __func__, mask);
return;
}
gpio_value = gpio_led_gpio_value(mask, state);
gpio_direction_output(mask, gpio_value);
}
void __led_set(led_id_t mask, int state)
{
int gpio_value = gpio_led_gpio_value(mask, state);
gpio_set_value(mask, gpio_value);
}
void __led_toggle(led_id_t mask)
{
gpio_set_value(mask, !gpio_get_value(mask));
}
#ifdef CONFIG_GPIO_LED_STUBS
/* 'generic' override of colored LED stubs, to use GPIO functions instead */
#ifdef CONFIG_LED_STATUS_RED
void red_led_on(void)
{
__led_set(CONFIG_LED_STATUS_RED, CONFIG_LED_STATUS_ON);
}
void red_led_off(void)
{
__led_set(CONFIG_LED_STATUS_RED, CONFIG_LED_STATUS_OFF);
}
#endif
#ifdef CONFIG_LED_STATUS_GREEN
void green_led_on(void)
{
__led_set(CONFIG_LED_STATUS_GREEN, CONFIG_LED_STATUS_ON);
}
void green_led_off(void)
{
__led_set(CONFIG_LED_STATUS_GREEN, CONFIG_LED_STATUS_OFF);
}
#endif
#ifdef CONFIG_LED_STATUS_YELLOW
void yellow_led_on(void)
{
__led_set(CONFIG_LED_STATUS_YELLOW, CONFIG_LED_STATUS_ON);
}
void yellow_led_off(void)
{
__led_set(CONFIG_LED_STATUS_YELLOW, CONFIG_LED_STATUS_OFF);
}
#endif
#ifdef CONFIG_LED_STATUS_BLUE
void blue_led_on(void)
{
__led_set(CONFIG_LED_STATUS_BLUE, CONFIG_LED_STATUS_ON);
}
void blue_led_off(void)
{
__led_set(CONFIG_LED_STATUS_BLUE, CONFIG_LED_STATUS_OFF);
}
#endif
#endif /* CONFIG_GPIO_LED_STUBS */