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authorAndi Kleen <ak@novell.com>2007-05-08 00:29:55 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-05-08 11:15:10 -0700
commitf038f9a361a764ed013447174b7170073f89cbe9 (patch)
tree63963a1c5e8e0228d601637e9c96ebffd152a942 /drivers/misc/blink.c
parent6b9686211374a9751ae70a95fd1fcfb8c2a80698 (diff)
downloadlinux-stericsson-f038f9a361a764ed013447174b7170073f89cbe9.tar.gz
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 'drivers/misc/blink.c')
-rw-r--r--drivers/misc/blink.c27
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);
+