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alarmtimer: Provide accessor to alarmtimer rtc device 

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>
This commit is contained in:
John Stultz 2012-04-20 12:31:45 -07:00 committed by Greg Kroah-Hartman
parent e2d8ccef0a
commit 57c498fa5d
2 changed files with 5 additions and 2 deletions
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3
include/linux/alarmtimer.h
View File

@ -76,4 +76,7 @@ static inline int alarmtimer_callback_running(struct alarm *timer)
} }
/* Provide way to access the rtc device being used by alarmtimers */
struct rtc_device *alarmtimer_get_rtcdev(void);
#endif #endif

4
kernel/time/alarmtimer.c
View File

@ -59,7 +59,7 @@ static DEFINE_SPINLOCK(rtcdev_lock);
* If one has not already been chosen, it checks to see if a * If one has not already been chosen, it checks to see if a
* functional rtc device is available. * functional rtc device is available.
*/ */
static struct rtc_device *alarmtimer_get_rtcdev(void) struct rtc_device *alarmtimer_get_rtcdev(void)
{ {
unsigned long flags; unsigned long flags;
struct rtc_device *ret; struct rtc_device *ret;
@ -115,7 +115,7 @@ static void alarmtimer_rtc_interface_remove(void)
class_interface_unregister(&alarmtimer_rtc_interface); class_interface_unregister(&alarmtimer_rtc_interface);
} }
#else #else
static inline struct rtc_device *alarmtimer_get_rtcdev(void) struct rtc_device *alarmtimer_get_rtcdev(void)
{ {
return NULL; return NULL;
} }