[edk2-devel] [edk2-platforms] [PATCH V2 3/4] CometlakeOpenBoardPkg: Indicate width of CLK duty cycle in FADT

[Nate DeSimone]

Set the location of the DUTY_CYCLE field in the P_CNT register
and indicate the width of the clock duty cycle to OS power management

Cc: Chasel Chiu <chasel.chiu at intel.com>
Cc: Michael Kubacki <michael.kubacki at microsoft.com>
Cc: Rangasai V Chaganty <rangasai.v.chaganty at intel.com>
Cc: Deepika Kethi Reddy <deepika.kethi.reddy at intel.com>
Cc: Kathappan Esakkithevar <kathappan.esakkithevar at intel.com>
Signed-off-by: Nate DeSimone <nathaniel.l.desimone at intel.com>
---
 .../CometlakeURvp/OpenBoardPkgPcd.dsc                    | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/Platform/Intel/CometlakeOpenBoardPkg/CometlakeURvp/OpenBoardPkgPcd.dsc b/Platform/Intel/CometlakeOpenBoardPkg/CometlakeURvp/OpenBoardPkgPcd.dsc
index 589b002d06..68dd08423b 100644
--- a/Platform/Intel/CometlakeOpenBoardPkg/CometlakeURvp/OpenBoardPkgPcd.dsc
+++ b/Platform/Intel/CometlakeOpenBoardPkg/CometlakeURvp/OpenBoardPkgPcd.dsc
@@ -1,7 +1,7 @@
 ## @file
 #  PCD configuration build description file for the CometlakeURvp board.
 #
-# Copyright (c) 2020, Intel Corporation. All rights reserved.<BR>
+# Copyright (c) 2020 - 2022, Intel Corporation. All rights reserved.<BR>
 #
 # SPDX-License-Identifier: BSD-2-Clause-Patent
 #
@@ -253,6 +253,13 @@
   gMinPlatformPkgTokenSpaceGuid.PcdMaxCpuCoreCount|8
   gMinPlatformPkgTokenSpaceGuid.PcdMaxCpuThreadCount|2
 
+  #
+  # Set the location of the DUTY_CYCLE field in the P_CNT register
+  # and indicate the width of the clock duty cycle to OS power management
+  #
+  gMinPlatformPkgTokenSpaceGuid.PcdFadtDutyOffset|0x1
+  gMinPlatformPkgTokenSpaceGuid.PcdFadtDutyWidth|0x3
+
   #
   # The PCDs are used to control the Windows SMM Security Mitigations Table - Protection Flags
   #
-- 
2.27.0.windows.1



-=-=-=-=-=-=-=-=-=-=-=-
Groups.io Links: You receive all messages sent to this group.
View/Reply Online (#90270): https://edk2.groups.io/g/devel/message/90270
Mute This Topic: https://groups.io/mt/91589976/1813853
Group Owner: devel+owner at edk2.groups.io
Unsubscribe: https://edk2.groups.io/g/devel/unsub [edk2-devel-archive at redhat.com]
-=-=-=-=-=-=-=-=-=-=-=-