1 /* 2 * LED Disk Activity Trigger 3 * 4 * Copyright 2006 Openedhand Ltd. 5 * 6 * Author: Richard Purdie <rpurdie@openedhand.com> 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License version 2 as 10 * published by the Free Software Foundation. 11 * 12 */ 13 14 #include <linux/kernel.h> 15 #include <linux/init.h> 16 #include <linux/leds.h> 17 18 #define BLINK_DELAY 30 19 20 DEFINE_LED_TRIGGER(ledtrig_disk); 21 DEFINE_LED_TRIGGER(ledtrig_disk_read); 22 DEFINE_LED_TRIGGER(ledtrig_disk_write); 23 DEFINE_LED_TRIGGER(ledtrig_ide); 24 25 void ledtrig_disk_activity(bool write) 26 { 27 unsigned long blink_delay = BLINK_DELAY; 28 29 led_trigger_blink_oneshot(ledtrig_disk, 30 &blink_delay, &blink_delay, 0); 31 led_trigger_blink_oneshot(ledtrig_ide, 32 &blink_delay, &blink_delay, 0); 33 if (write) 34 led_trigger_blink_oneshot(ledtrig_disk_write, 35 &blink_delay, &blink_delay, 0); 36 else 37 led_trigger_blink_oneshot(ledtrig_disk_read, 38 &blink_delay, &blink_delay, 0); 39 } 40 EXPORT_SYMBOL(ledtrig_disk_activity); 41 42 static int __init ledtrig_disk_init(void) 43 { 44 led_trigger_register_simple("disk-activity", &ledtrig_disk); 45 led_trigger_register_simple("disk-read", &ledtrig_disk_read); 46 led_trigger_register_simple("disk-write", &ledtrig_disk_write); 47 led_trigger_register_simple("ide-disk", &ledtrig_ide); 48 49 return 0; 50 } 51 device_initcall(ledtrig_disk_init); 52