linux_kernel/drivers/leds/trigger/ledtrig-ide-disk.c

/*
 * LED IDE-Disk Activity Trigger
 *
 * Copyright 2006 Openedhand Ltd.
 *
 * Author: Richard Purdie <rpurdie@openedhand.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 */

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/leds.h>

#define BLINK_DELAY 30

DEFINE_LED_TRIGGER(ledtrig_ide);
static unsigned long ide_blink_delay = BLINK_DELAY;

void ledtrig_ide_activity(void)
{
	led_trigger_blink_oneshot(ledtrig_ide,
				  &ide_blink_delay, &ide_blink_delay, 0);
}
EXPORT_SYMBOL(ledtrig_ide_activity);

static int __init ledtrig_ide_init(void)
{
	led_trigger_register_simple("ide-disk", &ledtrig_ide);
	return 0;
}
device_initcall(ledtrig_ide_init);