mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-21 11:44:01 +08:00
1bd465e6b0
This patch allows drivers to override the default maximum brightness value of 255. We take care to preserve backwards-compatibility as much as possible, so that user-space ABI doesn't change for existing drivers. LED trigger code has also been updated to use the per-LED maximum. Signed-off-by: Guennadi Liakhovetski <lg@denx.de> Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
65 lines
1.6 KiB
C
65 lines
1.6 KiB
C
/*
|
|
* 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/jiffies.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;
|
|
/* INT_MAX will set each LED to its maximum brightness */
|
|
led_trigger_event(ledtrig_ide, INT_MAX);
|
|
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");
|