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Commit a0adcbc0 authored by Mao Jinlong's avatar Mao Jinlong Committed by David Collins
Browse files

alarmtimer: add rtc irq support for alarm 



Add the rtc irq support for alarmtimer to wakeup the
alarm during system suspend.

Change-Id: I41b774ed4e788359321e1c6a564551cc9cd40c8e
Signed-off-by: default avatarXiaocheng Li <lix@codeaurora.org>
Signed-off-by: default avatarDavid Collins <collinsd@codeaurora.org>
parent 09055697

kernel/time/alarmtimer.c

+31 −6
Original line number Diff line number Diff line
@@ -52,6 +52,18 @@ static struct rtc_timer rtctimer; 
static struct rtc_device	*rtcdev;

static DEFINE_SPINLOCK(rtcdev_lock);



static void alarmtimer_triggered_func(void *p)

{

	struct rtc_device *rtc = rtcdev;



	if (!(rtc->irq_data & RTC_AF))

		return;

	__pm_wakeup_event(ws, 2 * MSEC_PER_SEC);

}



static struct rtc_task alarmtimer_rtc_task = {

	.func = alarmtimer_triggered_func

};

/**

 * alarmtimer_get_rtcdev - Return selected rtcdevice

 *
@@ -62,7 +74,7 @@ static DEFINE_SPINLOCK(rtcdev_lock); 
struct rtc_device *alarmtimer_get_rtcdev(void)

{

	unsigned long flags;

	struct rtc_device *ret;

	struct rtc_device *ret = NULL;



	spin_lock_irqsave(&rtcdev_lock, flags);

	ret = rtcdev;
@@ -76,24 +88,36 @@ static int alarmtimer_rtc_add_device(struct device *dev, 
				struct class_interface *class_intf)

{

	unsigned long flags;

	int err = 0;

	struct rtc_device *rtc = to_rtc_device(dev);



	if (rtcdev)

		return -EBUSY;



	if (!rtc->ops->set_alarm)

		return -1;

	if (!device_may_wakeup(rtc->dev.parent))

		return -1;



	spin_lock_irqsave(&rtcdev_lock, flags);

	if (!rtcdev) {

		err = rtc_irq_register(rtc, &alarmtimer_rtc_task);

		if (err)

			goto rtc_irq_reg_err;

		rtcdev = rtc;

		/* hold a reference so it doesn't go away */

		get_device(dev);

	}



rtc_irq_reg_err:

	spin_unlock_irqrestore(&rtcdev_lock, flags);

	return 0;

	return err;



}



static void alarmtimer_rtc_remove_device(struct device *dev,

				struct class_interface *class_intf)

{

	if (rtcdev && dev == &rtcdev->dev) {

		rtc_irq_unregister(rtcdev, &alarmtimer_rtc_task);

		rtcdev = NULL;

	}

}



static inline void alarmtimer_rtc_timer_init(void)
@@ -103,6 +127,7 @@ static inline void alarmtimer_rtc_timer_init(void) 


static struct class_interface alarmtimer_rtc_interface = {

	.add_dev = &alarmtimer_rtc_add_device,

	.remove_dev = &alarmtimer_rtc_remove_device,

};



static int alarmtimer_rtc_interface_setup(void)