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Commit 2ad451a7 authored by Mao Jinlong's avatar Mao Jinlong
Browse files

alarmtimer: add rtc irq support for alarm 



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

CRs-Fixed: 2261309
Change-Id: I41b774ed4e788359321e1c6a564551cc9cd40c8e
Signed-off-by: default avatarMao Jinlong <jinlmao@codeaurora.org>
parent c2bb0648

kernel/time/alarmtimer.c

+31 −4
Original line number Diff line number Diff line
@@ -65,6 +65,19 @@ 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

 *
@@ -75,7 +88,7 @@ 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;
@@ -89,6 +102,7 @@ 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);

	struct wakeup_source *__ws;
@@ -97,8 +111,6 @@ static int alarmtimer_rtc_add_device(struct device *dev, 


	if (!rtc->ops->set_alarm)

		return -1;

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

		return -1;



	__ws = wakeup_source_register("alarmtimer");
@@ -109,17 +121,31 @@ static int alarmtimer_rtc_add_device(struct device *dev, 
			return -1;

		}



		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);

		ws = __ws;

		__ws = NULL;

	}



rtc_irq_reg_err:

	spin_unlock_irqrestore(&rtcdev_lock, flags);



	wakeup_source_unregister(__ws);

	return err;

}



	return 0;

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)
@@ -129,6 +155,7 @@ 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)