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: Xiaocheng Li <lix@codeaurora.org>
Signed-off-by: David Collins <collinsd@codeaurora.org>
diff --git a/kernel/time/alarmtimer.c b/kernel/time/alarmtimer.c
index 12dd190..1ea1deb 100644
--- a/kernel/time/alarmtimer.c
+++ b/kernel/time/alarmtimer.c
@@ -52,6 +52,18 @@
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 @@
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 @@
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 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)