2 files changed, 17 insertions, 7 deletions
diff --git a/IntelFrameworkModulePkg/Universal/PcatSingleSegmentPciCfgPei/PciCfg.c b/IntelFrameworkModulePkg/Universal/PcatSingleSegmentPciCfgPei/PciCfg.c
index 2162b63557..5becfe4701 100644
--- a/IntelFrameworkModulePkg/Universal/PcatSingleSegmentPciCfgPei/PciCfg.c
+++ b/IntelFrameworkModulePkg/Universal/PcatSingleSegmentPciCfgPei/PciCfg.c
@@ -54,7 +54,7 @@ PciCfgRead (
   UINTN  PciLibAddress;
 
   PciLibAddress = PciCfgAddressConvert ((EFI_PEI_PCI_CFG_PPI_PCI_ADDRESS *) &Address);
-	switch (Width) {
+  switch (Width) {
     case EfiPeiPciCfgWidthUint8:
       * (UINT8 *) Buffer = PciRead8 (PciLibAddress);
       break;
@@ -70,7 +70,7 @@ PciCfgRead (
     default:
       return EFI_INVALID_PARAMETER;
   }
-	return EFI_SUCCESS;
+  return EFI_SUCCESS;
 }
 
 
@@ -119,8 +119,8 @@ PciCfgWrite (
 
     default:
       return EFI_INVALID_PARAMETER;
-	}
-	return EFI_SUCCESS;
+  }
+  return EFI_SUCCESS;
 }
 
 
@@ -154,7 +154,7 @@ PciCfgModify (
   UINTN  PciLibAddress;
 
   PciLibAddress = PciCfgAddressConvert ((EFI_PEI_PCI_CFG_PPI_PCI_ADDRESS *) &Address);
-	switch (Width) {
+  switch (Width) {
     case EfiPeiPciCfgWidthUint8:
       PciAndThenOr8 (PciLibAddress, (UINT8)~ClearBits, (UINT8)SetBits);
       break;
@@ -170,5 +170,6 @@ PciCfgModify (
     default:
       return EFI_INVALID_PARAMETER;
   }
-	return EFI_SUCCESS;
+  return EFI_SUCCESS;
 }
+
diff --git a/IntelFrameworkModulePkg/Universal/PcatSingleSegmentPciCfgPei/PciCfg2.c b/IntelFrameworkModulePkg/Universal/PcatSingleSegmentPciCfgPei/PciCfg2.c
index 2055db3f45..3ce363251b 100644
--- a/IntelFrameworkModulePkg/Universal/PcatSingleSegmentPciCfgPei/PciCfg2.c
+++ b/IntelFrameworkModulePkg/Universal/PcatSingleSegmentPciCfgPei/PciCfg2.c
@@ -260,7 +260,15 @@ PciCfg2Modify (
   return EFI_SUCCESS;
 }
 
-
+/**
+  Module's entry function. 
+  This routine will install EFI_PEI_PCI_CFG2_PPI or EFI_PEI_PCI_CFG_PPI
+  according to PeiServices's version.
+  
+  @param FfsHeader    Image's header
+  @param PeiServices  Pointer of EFI_PEI_SERVICES
+  @return Whether success to install service
+**/
 EFI_STATUS
 EFIAPI
 PeimInitializePciCfg (
@@ -298,3 +306,4 @@ PeimInitializePciCfg (
 
   return Status;
 }
+