drivers/rtc/mxc: Modify rtc_update_alarm() not to touch the alarm time

rtc_class_ops's set_alarm() shouldn't deal with the alarm date,
as this is handled in the rtc core.

See rtc_dev_ioctl()'s RTC_ALM_SET and RTC_WKALM_SET cases.

Signed-off-by: Xunlei Pang <pang.xunlei@linaro.org>
Signed-off-by: John Stultz <john.stultz@linaro.org>
Acked-by: Alessandro Zummo <a.zummo@towertech.it>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1427945681-29972-12-git-send-email-john.stultz@linaro.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>

1 files changed, 4 insertions, 18 deletions

diff --git a/drivers/rtc/rtc-mxc.c b/drivers/rtc/rtc-mxc.c
index 3c3f8d10ab43..a7b218ff078d 100644
--- a/drivers/rtc/rtc-mxc.c
+++ b/drivers/rtc/rtc-mxc.c
@@ -173,29 +173,18 @@ static void set_alarm_or_time(struct device *dev, int time_alarm, u32 time)
  * This function updates the RTC alarm registers and then clears all the
  * interrupt status bits.
  */
-static int rtc_update_alarm(struct device *dev, struct rtc_time *alrm)
+static void rtc_update_alarm(struct device *dev, struct rtc_time *alrm)
 {
-        struct rtc_time alarm_tm, now_tm;
-        unsigned long now, time;
+        unsigned long time;
         struct platform_device *pdev = to_platform_device(dev);
         struct rtc_plat_data *pdata = platform_get_drvdata(pdev);
         void __iomem *ioaddr = pdata->ioaddr;
 
-        now = get_alarm_or_time(dev, MXC_RTC_TIME);
-        rtc_time_to_tm(now, &now_tm);
-        alarm_tm.tm_year = now_tm.tm_year;
-        alarm_tm.tm_mon = now_tm.tm_mon;
-        alarm_tm.tm_mday = now_tm.tm_mday;
-        alarm_tm.tm_hour = alrm->tm_hour;
-        alarm_tm.tm_min = alrm->tm_min;
-        alarm_tm.tm_sec = alrm->tm_sec;
-        rtc_tm_to_time(&alarm_tm, &time);
+        rtc_tm_to_time(alrm, &time);
 
         /* clear all the interrupt status bits */
         writew(readw(ioaddr + RTC_RTCISR), ioaddr + RTC_RTCISR);
         set_alarm_or_time(dev, MXC_RTC_ALARM, time);
-
-        return 0;
 }
 
 static void mxc_rtc_irq_enable(struct device *dev, unsigned int bit,
@@ -346,11 +335,8 @@ static int mxc_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
 {
         struct platform_device *pdev = to_platform_device(dev);
         struct rtc_plat_data *pdata = platform_get_drvdata(pdev);
-        int ret;
 
-        ret = rtc_update_alarm(dev, &alrm->time);
-        if (ret)
-                return ret;
+        rtc_update_alarm(dev, &alrm->time);
 
         memcpy(&pdata->g_rtc_alarm, &alrm->time, sizeof(struct rtc_time));
         mxc_rtc_irq_enable(dev, RTC_ALM_BIT, alrm->enabled);