[PATCH] rtc: vt8500: Fix year field in vt8500_rtc_set_time

[Tony Prisk]

year field is incorrectly masked when setting the date. If the year
is beyond 2099, the year field will be incorrectly updated in hardware.

This patch masks the year field correctly.

Signed-off-by: Edgar Toernig <froese at gmx.de>
Signed-off-by: Tony Prisk <linux at prisktech.co.nz>
---
Patch based on 3.8-rc1

 drivers/rtc/rtc-vt8500.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/rtc/rtc-vt8500.c b/drivers/rtc/rtc-vt8500.c
index 14e2d8c..37b42a4 100644
--- a/drivers/rtc/rtc-vt8500.c
+++ b/drivers/rtc/rtc-vt8500.c
@@ -137,7 +137,7 @@ static int vt8500_rtc_set_time(struct device *dev, struct rtc_time *tm)
 		return -EINVAL;
 	}
 
-	writel((bin2bcd(tm->tm_year - 100) << DATE_YEAR_S)
+	writel((bin2bcd(tm->tm_year % 100) << DATE_YEAR_S)
 		| (bin2bcd(tm->tm_mon) << DATE_MONTH_S)
 		| (bin2bcd(tm->tm_mday)),
 		vt8500_rtc->regbase + VT8500_RTC_DS);
-- 
1.7.9.5