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| author | Andi Kleen <ak@novell.com> | 2007-05-08 09:29:55 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-05-08 20:15:10 +0200 |
| commit | f038f9a361a764ed013447174b7170073f89cbe9 (patch) | |
| tree | 63963a1c5e8e0228d601637e9c96ebffd152a942 /drivers/misc/blink.c | |
| parent | Add webpages' URL and summarize 3 lines. (diff) | |
| download | linux-f038f9a361a764ed013447174b7170073f89cbe9.tar.xz linux-f038f9a361a764ed013447174b7170073f89cbe9.zip | |
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>
Diffstat (limited to '')
| -rw-r--r-- | drivers/misc/blink.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/drivers/misc/blink.c b/drivers/misc/blink.c new file mode 100644 index 000000000000..634431ce1184 --- /dev/null +++ b/drivers/misc/blink.c @@ -0,0 +1,27 @@ +#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); + |