Messages in this thread Patch in this message | | | Date | Sun, 1 Jul 2007 12:50:35 -0400 | From | Stephen Hemminger <> | Subject | blink driver power saving |
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The blink driver wakes up every jiffies which wastes power unnecessarily. Using a notifier gives same effect. Also add ability to unload module.
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
--- a/drivers/misc/blink.c 2007-06-29 22:56:20.000000000 -0400 +++ b/drivers/misc/blink.c 2007-07-01 12:44:37.000000000 -0400 @@ -16,12 +16,30 @@ static void do_blink(unsigned long data) add_timer(&blink_timer); } -static int blink_init(void) +static int blink_panic_event(struct notifier_block *blk, + unsigned long event, void *arg) { - printk(KERN_INFO "Enabling keyboard blinking\n"); do_blink(0); return 0; } +static struct notifier_block blink_notify = { + .notifier_call = blink_panic_event, +}; + +static __init int blink_init(void) +{ + printk(KERN_INFO "Enabling keyboard blinking\n"); + atomic_notifier_chain_register(&panic_notifier_list, &blink_notify); + return 0; +} + +static __exit void blink_remove(void) +{ + del_timer_sync(&blink_timer); + atomic_notifier_chain_unregister(&panic_notifier_list, &blink_notify); +} + module_init(blink_init); +module_exit(blink_remove); - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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