mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-23 04:34:11 +08:00
57c498fa5d
The Android alarm interface provides a settime call that sets both the alarmtimer RTC device and CLOCK_REALTIME to the same value. Since there may be multiple rtc devices, provide a hook to access the one the alarmtimer infrastructure is using. CC: Colin Cross <ccross@android.com> CC: Thomas Gleixner <tglx@linutronix.de> CC: Android Kernel Team <kernel-team@android.com> Signed-off-by: John Stultz <john.stultz@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
83 lines
2.1 KiB
C
83 lines
2.1 KiB
C
#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,
|
|
};
|
|
|
|
enum alarmtimer_restart {
|
|
ALARMTIMER_NORESTART,
|
|
ALARMTIMER_RESTART,
|
|
};
|
|
|
|
|
|
#define ALARMTIMER_STATE_INACTIVE 0x00
|
|
#define ALARMTIMER_STATE_ENQUEUED 0x01
|
|
#define ALARMTIMER_STATE_CALLBACK 0x02
|
|
|
|
/**
|
|
* struct alarm - Alarm timer structure
|
|
* @node: timerqueue node for adding to the event list this value
|
|
* also includes the expiration time.
|
|
* @period: Period for recuring alarms
|
|
* @function: Function pointer to be executed when the timer fires.
|
|
* @type: Alarm type (BOOTTIME/REALTIME)
|
|
* @enabled: Flag that represents if the alarm is set to fire or not
|
|
* @data: Internal data value.
|
|
*/
|
|
struct alarm {
|
|
struct timerqueue_node node;
|
|
enum alarmtimer_restart (*function)(struct alarm *, ktime_t now);
|
|
enum alarmtimer_type type;
|
|
int state;
|
|
void *data;
|
|
};
|
|
|
|
void alarm_init(struct alarm *alarm, enum alarmtimer_type type,
|
|
enum alarmtimer_restart (*function)(struct alarm *, ktime_t));
|
|
void alarm_start(struct alarm *alarm, ktime_t start);
|
|
int alarm_try_to_cancel(struct alarm *alarm);
|
|
int alarm_cancel(struct alarm *alarm);
|
|
|
|
u64 alarm_forward(struct alarm *alarm, ktime_t now, ktime_t interval);
|
|
|
|
/*
|
|
* A alarmtimer is active, when it is enqueued into timerqueue or the
|
|
* callback function is running.
|
|
*/
|
|
static inline int alarmtimer_active(const struct alarm *timer)
|
|
{
|
|
return timer->state != ALARMTIMER_STATE_INACTIVE;
|
|
}
|
|
|
|
/*
|
|
* Helper function to check, whether the timer is on one of the queues
|
|
*/
|
|
static inline int alarmtimer_is_queued(struct alarm *timer)
|
|
{
|
|
return timer->state & ALARMTIMER_STATE_ENQUEUED;
|
|
}
|
|
|
|
/*
|
|
* Helper function to check, whether the timer is running the callback
|
|
* function
|
|
*/
|
|
static inline int alarmtimer_callback_running(struct alarm *timer)
|
|
{
|
|
return timer->state & ALARMTIMER_STATE_CALLBACK;
|
|
}
|
|
|
|
|
|
/* Provide way to access the rtc device being used by alarmtimers */
|
|
struct rtc_device *alarmtimer_get_rtcdev(void);
|
|
|
|
#endif
|