projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 2bfb646c RP |
1 | /* |
| 2 | * LED IDE-Disk Activity Trigger | |
| 3 | * | |
| 4 | * Copyright 2006 Openedhand Ltd. | |
| 5 | * | |
| 6 | * Author: Richard Purdie <[email protected]> | |
| 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/module.h> | |
| f6a57033 | 15 | #include <linux/jiffies.h> |
| 2bfb646c RP |
16 | #include <linux/kernel.h> |
| 17 | #include <linux/init.h> | |
| 18 | #include <linux/timer.h> | |
| 19 | #include <linux/leds.h> | |
| 20 | ||
| 21 | static void ledtrig_ide_timerfunc(unsigned long data); | |
| 22 | ||
| 23 | DEFINE_LED_TRIGGER(ledtrig_ide); | |
| 24 | static DEFINE_TIMER(ledtrig_ide_timer, ledtrig_ide_timerfunc, 0, 0); | |
| 25 | static int ide_activity; | |
| 26 | static int ide_lastactivity; | |
| 27 | ||
| 28 | void ledtrig_ide_activity(void) | |
| 29 | { | |
| 30 | ide_activity++; | |
| 31 | if (!timer_pending(&ledtrig_ide_timer)) | |
| 32 | mod_timer(&ledtrig_ide_timer, jiffies + msecs_to_jiffies(10)); | |
| 33 | } | |
| 34 | EXPORT_SYMBOL(ledtrig_ide_activity); | |
| 35 | ||
| 36 | static void ledtrig_ide_timerfunc(unsigned long data) | |
| 37 | { | |
| 38 | if (ide_lastactivity != ide_activity) { | |
| 39 | ide_lastactivity = ide_activity; | |
| 1bd465e6 GL |
40 | /* INT_MAX will set each LED to its maximum brightness */ |
| 41 | led_trigger_event(ledtrig_ide, INT_MAX); | |
| 4d404fd5 | 42 | mod_timer(&ledtrig_ide_timer, jiffies + msecs_to_jiffies(10)); |
| 2bfb646c RP |
43 | } else { |
| 44 | led_trigger_event(ledtrig_ide, LED_OFF); | |
| 45 | } | |
| 46 | } | |
| 47 | ||
| 48 | static int __init ledtrig_ide_init(void) | |
| 49 | { | |
| 50 | led_trigger_register_simple("ide-disk", &ledtrig_ide); | |
| 51 | return 0; | |
| 52 | } | |
| 53 | ||
| 54 | static void __exit ledtrig_ide_exit(void) | |
| 55 | { | |
| 56 | led_trigger_unregister_simple(ledtrig_ide); | |
| 57 | } | |
| 58 | ||
| 59 | module_init(ledtrig_ide_init); | |
| 60 | module_exit(ledtrig_ide_exit); | |
| 61 | ||
| 62 | MODULE_AUTHOR("Richard Purdie <[email protected]>"); | |
| 63 | MODULE_DESCRIPTION("LED IDE Disk Activity Trigger"); | |
| 64 | MODULE_LICENSE("GPL"); |