diff options
| author | John Stultz <john.stultz@linaro.org> | 2011-01-11 09:42:13 -0800 |
|---|---|---|
| committer | John Stultz <john.stultz@linaro.org> | 2011-04-26 14:01:44 -0700 |
| commit | ff3ead96d17f47ee70c294a5cc2cce9b61e82f0f (patch) | |
| tree | e87fc16e1fc4a80b9591c2b1d02c99459254aa95 /include | |
| parent | 88d19cf37952a7e1e38b2bf87a00f0e857e63180 (diff) | |
timers: Introduce in-kernel alarm-timer interface
This provides the in kernel interface and infrastructure for
alarm-timers.
Alarm-timers are a hybrid style timer, similar to hrtimers,
but when the system is suspended, the RTC device is set to
fire and wake the system for when the soonest alarm-timer
expires.
The concept for Alarm-timers was inspired by the Android Alarm
driver (by Arve Hjønnevåg) found in the Android kernel tree.
See: http://android.git.kernel.org/?p=kernel/common.git;a=blob;f=drivers/rtc/alarm.c;h=1250edfbdf3302f5e4ea6194847c6ef4bb7beb1c;hb=android-2.6.36
This in-kernel interface should be fairly compatible with the
Android alarm driver in-kernel interface, but has the advantage
of utilizing the new RTC timerqueue code instead of doing direct
RTC manipulation.
CC: Arve Hjønnevåg <arve@android.com>
CC: Thomas Gleixner <tglx@linutronix.de>
CC: Alessandro Zummo <a.zummo@towertech.it>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: John Stultz <john.stultz@linaro.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/alarmtimer.h | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/include/linux/alarmtimer.h b/include/linux/alarmtimer.h new file mode 100644 index 000000000000..6b364b2e2074 --- /dev/null +++ b/include/linux/alarmtimer.h @@ -0,0 +1,30 @@ +#ifndef _LINUX_ALARMTIMER_H +#define _LINUX_ALARMTIMER_H + +#include <linux/time.h> +#include <linux/hrtimer.h> +#include <linux/timerqueue.h> +#include <linux/rtc.h> + +enum alarmtimer_type { + ALARM_REALTIME, + ALARM_BOOTTIME, + + ALARM_NUMTYPE, +}; + +struct alarm { + struct timerqueue_node node; + ktime_t period; + void (*function)(struct alarm *); + enum alarmtimer_type type; + char enabled; + void *data; +}; + +void alarm_init(struct alarm *alarm, enum alarmtimer_type type, + void (*function)(struct alarm *)); +void alarm_start(struct alarm *alarm, ktime_t start, ktime_t period); +void alarm_cancel(struct alarm *alarm); + +#endif |