From c39c3e219079893c1607babd40b8510c2ad6c502 Mon Sep 17 00:00:00 2001
From: niruiyu <niruiyu@6f19259b-4bc3-4df7-8a09-765794883524>
Date: Sat, 20 Feb 2010 07:11:13 +0000
Subject: [PATCH] add more comments for
 gEfiMdeModulePkgTokenSpaceGuid.PcdTurnOffUsbLegacySupport.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@10032 6f19259b-4bc3-4df7-8a09-765794883524
---
 MdeModulePkg/Bus/Pci/EhciDxe/Ehci.c | 2 +-
 MdeModulePkg/MdeModulePkg.dec       | 3 ++-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/MdeModulePkg/Bus/Pci/EhciDxe/Ehci.c b/MdeModulePkg/Bus/Pci/EhciDxe/Ehci.c
index aded0b3acb..3161ede949 100644
--- a/MdeModulePkg/Bus/Pci/EhciDxe/Ehci.c
+++ b/MdeModulePkg/Bus/Pci/EhciDxe/Ehci.c
@@ -1704,7 +1704,7 @@ EhcDriverBindingStart (
   }
 
   //
-  // Robustnesss improvement such as for UoL
+  // Robustnesss improvement such as for Duet platform
   // Default is not required.
   //
   if (FeaturePcdGet (PcdTurnOffUsbLegacySupport)) {
diff --git a/MdeModulePkg/MdeModulePkg.dec b/MdeModulePkg/MdeModulePkg.dec
index d14cf8b56b..51bafbb44e 100644
--- a/MdeModulePkg/MdeModulePkg.dec
+++ b/MdeModulePkg/MdeModulePkg.dec
@@ -219,7 +219,8 @@
   gEfiMdeModulePkgTokenSpaceGuid.PcdPeiCoreImageLoaderSearchTeSectionFirst|TRUE|BOOLEAN|0x00010044
 
   ## If TRUE, force to switch off the support of legacy usb. So legacy usb device driver can not make use of SMI
-  #  interrupt to access usb device in the case of absence of usb stack.
+  #  interrupt to access usb device in the case of absence of usb stack. 
+  #  DUET platform requires the token to be TRUE.
   gEfiMdeModulePkgTokenSpaceGuid.PcdTurnOffUsbLegacySupport|FALSE|BOOLEAN|0x00010047
 
   ## If TRUE, HiiImageProtocol will be installed.