1// SPDX-License-Identifier: GPL-2.0-only 2/* 3 * LED Disk Activity Trigger 4 * 5 * Copyright 2006 Openedhand Ltd. 6 * 7 * Author: Richard Purdie <rpurdie@openedhand.com> 8 */ 9 10#include <linux/kernel.h> 11#include <linux/init.h> 12#include <linux/leds.h> 13 14#define BLINK_DELAY 30 15 16DEFINE_LED_TRIGGER(ledtrig_disk); 17DEFINE_LED_TRIGGER(ledtrig_disk_read); 18DEFINE_LED_TRIGGER(ledtrig_disk_write); 19 20void ledtrig_disk_activity(bool write) 21{ 22 led_trigger_blink_oneshot(ledtrig_disk, BLINK_DELAY, BLINK_DELAY, 0); 23 if (write) 24 led_trigger_blink_oneshot(ledtrig_disk_write, 25 BLINK_DELAY, BLINK_DELAY, 0); 26 else 27 led_trigger_blink_oneshot(ledtrig_disk_read, 28 BLINK_DELAY, BLINK_DELAY, 0); 29} 30EXPORT_SYMBOL(ledtrig_disk_activity); 31 32static int __init ledtrig_disk_init(void) 33{ 34 led_trigger_register_simple("disk-activity", &ledtrig_disk); 35 led_trigger_register_simple("disk-read", &ledtrig_disk_read); 36 led_trigger_register_simple("disk-write", &ledtrig_disk_write); 37 38 return 0; 39} 40device_initcall(ledtrig_disk_init); 41