kernel-ark/drivers/misc/blink.c
Andi Kleen f038f9a361 Add keyboard blink driver
Simple driver that blinks the keyboard LEDs when loaded.  Useful for
checking that the kernel is still alive or for crashdumping

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-08 11:15:10 -07:00

28 lines
522 B
C

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/timer.h>
#include <linux/jiffies.h>
static void do_blink(unsigned long data);
static DEFINE_TIMER(blink_timer, do_blink, 0 ,0);
static void do_blink(unsigned long data)
{
static long count;
if (panic_blink)
panic_blink(count++);
blink_timer.expires = jiffies + msecs_to_jiffies(1);
add_timer(&blink_timer);
}
static int blink_init(void)
{
printk(KERN_INFO "Enabling keyboard blinking\n");
do_blink(0);
return 0;
}
module_init(blink_init);