From 3e2744e41f07066bfa72e77c150251b5d59ca5cc Mon Sep 17 00:00:00 2001 From: Ruiyu Ni Date: Tue, 7 Jul 2015 05:41:43 +0000 Subject: [PATCH 1/1] PcRtc: Fix PcRtcInit() to not clear RegisterB Hour Format bit (BIT1) sometimes Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Ruiyu Ni Reviewed-by: Feng Tian git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@17848 6f19259b-4bc3-4df7-8a09-765794883524 --- PcAtChipsetPkg/PcatRealTimeClockRuntimeDxe/PcRtc.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/PcAtChipsetPkg/PcatRealTimeClockRuntimeDxe/PcRtc.c b/PcAtChipsetPkg/PcatRealTimeClockRuntimeDxe/PcRtc.c index 9ec309c6b9..5abb71c032 100644 --- a/PcAtChipsetPkg/PcatRealTimeClockRuntimeDxe/PcRtc.c +++ b/PcAtChipsetPkg/PcatRealTimeClockRuntimeDxe/PcRtc.c @@ -166,7 +166,8 @@ PcRtcInit ( // Set RTC configuration after get original time // The value of bit AIE should be reserved. // - RtcWrite (RTC_ADDRESS_REGISTER_B, (UINT8)(RTC_INIT_REGISTER_B | (RegisterB.Data & BIT5))); + RegisterB.Data = RTC_INIT_REGISTER_B | (RegisterB.Data & BIT5); + RtcWrite (RTC_ADDRESS_REGISTER_B, RegisterB.Data); // // Release RTC Lock. -- 2.39.2