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[PATCH] LED: Add IDE disk activity LED trigger

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Add an LED trigger for IDE disk activity to the ide-disk driver.

Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
Acked-by: Bartlomiej Zolnierkiewicz <B.Zolnierkiewicz@elka.pw.edu.pl>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Richard Purdie 2006-03-31 02:31:16 -08:00 committed by Linus Torvalds
parent 03731fbdd0
commit 2bfb646cdf
5 changed files with 81 additions and 0 deletions
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3
drivers/ide/ide-disk.c
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@ -61,6 +61,7 @@
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/mutex.h>
#include <linux/leds.h>
#define _IDE_DISK
@ -317,6 +318,8 @@ static ide_startstop_t ide_do_rw_disk (ide_drive_t *drive, struct request *rq, s
return ide_stopped;
}
ledtrig_ide_activity();
pr_debug("%s: %sing: block=%llu, sectors=%lu, buffer=0x%08lx\n",
drive->name, rq_data_dir(rq) == READ ? "read" : "writ",
(unsigned long long)block, rq->nr_sectors,

7
drivers/leds/Kconfig
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@ -66,5 +66,12 @@ config LEDS_TRIGGER_TIMER
This allows LEDs to be controlled by a programmable timer
via sysfs. If unsure, say Y.
config LEDS_TRIGGER_IDE_DISK
bool "LED Timer Trigger"
depends LEDS_TRIGGERS && BLK_DEV_IDEDISK
help
This allows LEDs to be controlled by IDE disk activity.
If unsure, say Y.
endmenu

1
drivers/leds/Makefile
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@ -13,3 +13,4 @@ obj-$(CONFIG_LEDS_TOSA) += leds-tosa.o
# LED Triggers
obj-$(CONFIG_LEDS_TRIGGER_TIMER) += ledtrig-timer.o
obj-$(CONFIG_LEDS_TRIGGER_IDE_DISK) += ledtrig-ide-disk.o

62
drivers/leds/ledtrig-ide-disk.c Normal file
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@ -0,0 +1,62 @@
/*
* 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/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/timer.h>
#include <linux/leds.h>
static void ledtrig_ide_timerfunc(unsigned long data);
DEFINE_LED_TRIGGER(ledtrig_ide);
static DEFINE_TIMER(ledtrig_ide_timer, ledtrig_ide_timerfunc, 0, 0);
static int ide_activity;
static int ide_lastactivity;
void ledtrig_ide_activity(void)
{
ide_activity++;
if (!timer_pending(&ledtrig_ide_timer))
mod_timer(&ledtrig_ide_timer, jiffies + msecs_to_jiffies(10));
}
EXPORT_SYMBOL(ledtrig_ide_activity);
static void ledtrig_ide_timerfunc(unsigned long data)
{
if (ide_lastactivity != ide_activity) {
ide_lastactivity = ide_activity;
led_trigger_event(ledtrig_ide, LED_FULL);
mod_timer(&ledtrig_ide_timer, jiffies + msecs_to_jiffies(10));
} else {
led_trigger_event(ledtrig_ide, LED_OFF);
}
}
static int __init ledtrig_ide_init(void)
{
led_trigger_register_simple("ide-disk", &ledtrig_ide);
return 0;
}
static void __exit ledtrig_ide_exit(void)
{
led_trigger_unregister_simple(ledtrig_ide);
}
module_init(ledtrig_ide_init);
module_exit(ledtrig_ide_exit);
MODULE_AUTHOR("Richard Purdie <rpurdie@openedhand.com>");
MODULE_DESCRIPTION("LED IDE Disk Activity Trigger");
MODULE_LICENSE("GPL");

8
include/linux/leds.h
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@ -100,4 +100,12 @@ extern void led_trigger_event(struct led_trigger *trigger,
#define led_trigger_event(x, y) do {} while(0)
#endif
/* Trigger specific functions */
#ifdef CONFIG_LEDS_TRIGGER_IDE_DISK
extern void ledtrig_ide_activity(void);
#else
#define ledtrig_ide_activity() do {} while(0)
#endif
#endif /* __LINUX_LEDS_H_INCLUDED */