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 16 DEFINE_LED_TRIGGER(ledtrig_disk); 17 DEFINE_LED_TRIGGER(ledtrig_disk_read); 18 DEFINE_LED_TRIGGER(ledtrig_disk_write); 19 DEFINE_LED_TRIGGER(ledtrig_ide); 20 21 void ledtrig_disk_activity(bool write) 22 { 23 unsigned long blink_delay = BLINK_DELAY; 24 25 led_trigger_blink_oneshot(ledtrig_disk, 26 &blink_delay, &blink_delay, 0); 27 led_trigger_blink_oneshot(ledtrig_ide, 28 &blink_delay, &blink_delay, 0); 29 if (write) 30 led_trigger_blink_oneshot(ledtrig_disk_write, 31 &blink_delay, &blink_delay, 0); 32 else 33 led_trigger_blink_oneshot(ledtrig_disk_read, 34 &blink_delay, &blink_delay, 0); 35 } 36 EXPORT_SYMBOL(ledtrig_disk_activity); 37 38 static int __init ledtrig_disk_init(void) 39 { 40 led_trigger_register_simple("disk-activity", &ledtrig_disk); 41 led_trigger_register_simple("disk-read", &ledtrig_disk_read); 42 led_trigger_register_simple("disk-write", &ledtrig_disk_write); 43 led_trigger_register_simple("ide-disk", &ledtrig_ide); 44 45 return 0; 46 } 47 device_initcall(ledtrig_disk_init); 48