From: Ard Biesheuvel <ard.biesheuvel@linaro.org>

Utilise the new HardwareInterrupt2 protocol to adjust the
Edge/Level characteristics of the Watchdog interrupt.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Girish Pathak <girish.pathak@arm.com>
Signed-off-by: Evan Lloyd <evan.lloyd@arm.com>
Tested-by: Girish Pathak <girish.pathak@arm.com>
Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org>
---
 ArmPkg/Drivers/GenericWatchdogDxe/GenericWatchdogDxe.inf |  6 ++--
 ArmPkg/Drivers/GenericWatchdogDxe/GenericWatchdogDxe.c   | 29 ++++++++++++--------
 2 files changed, 21 insertions(+), 14 deletions(-)

diff --git a/ArmPkg/Drivers/GenericWatchdogDxe/GenericWatchdogDxe.inf b/ArmPkg/Drivers/GenericWatchdogDxe/GenericWatchdogDxe.inf
index fece14cc18315cd15510680c438288687b60c018..ba0403d7fdc3589803c643c27a44918e73afa97e 100644
--- a/ArmPkg/Drivers/GenericWatchdogDxe/GenericWatchdogDxe.inf
+++ b/ArmPkg/Drivers/GenericWatchdogDxe/GenericWatchdogDxe.inf
@@ -1,5 +1,5 @@
 #
-#  Copyright (c) 2013-2014, ARM Limited. All rights reserved.
+#  Copyright (c) 2013-2017, ARM Limited. All rights reserved.
 #
 #  This program and the accompanying materials
 #  are licensed and made available under the terms and conditions of the BSD License
@@ -47,7 +47,7 @@ [Pcd.common]
 
 [Protocols]
   gEfiWatchdogTimerArchProtocolGuid
-  gHardwareInterruptProtocolGuid
+  gHardwareInterrupt2ProtocolGuid
 
 [Depex]
-  gHardwareInterruptProtocolGuid
+  gHardwareInterrupt2ProtocolGuid
diff --git a/ArmPkg/Drivers/GenericWatchdogDxe/GenericWatchdogDxe.c b/ArmPkg/Drivers/GenericWatchdogDxe/GenericWatchdogDxe.c
index c5372056f3ea080c350ff67ce8f78f0a77663343..252ba5bf321e379ef440830cab468af7c55905b3 100644
--- a/ArmPkg/Drivers/GenericWatchdogDxe/GenericWatchdogDxe.c
+++ b/ArmPkg/Drivers/GenericWatchdogDxe/GenericWatchdogDxe.c
@@ -24,8 +24,8 @@
 #include <Library/UefiLib.h>
 #include <Library/ArmGenericTimerCounterLib.h>
 
+#include <Protocol/HardwareInterrupt2.h>
 #include <Protocol/WatchdogTimer.h>
-#include <Protocol/HardwareInterrupt.h>
 
 #include "GenericWatchdog.h"
 
@@ -41,7 +41,7 @@ UINTN mTimerFrequencyHz = 0;
    It is therefore stored here. 0 means the timer is not running. */
 UINT64 mNumTimerTicks = 0;
 
-EFI_HARDWARE_INTERRUPT_PROTOCOL *mInterruptProtocol;
+EFI_HARDWARE_INTERRUPT2_PROTOCOL *mInterruptProtocol;
 
 EFI_STATUS
 WatchdogWriteOffsetRegister (
@@ -311,7 +311,7 @@ GenericWatchdogEntry (
   if (!EFI_ERROR (Status)) {
     // Install interrupt handler
     Status = gBS->LocateProtocol (
-                    &gHardwareInterruptProtocolGuid,
+                    &gHardwareInterrupt2ProtocolGuid,
                     NULL,
                     (VOID **)&mInterruptProtocol
                     );
@@ -322,14 +322,21 @@ GenericWatchdogEntry (
                  WatchdogInterruptHandler
                  );
       if (!EFI_ERROR (Status)) {
-        // Install the Timer Architectural Protocol onto a new handle
-        Handle = NULL;
-        Status = gBS->InstallMultipleProtocolInterfaces (
-                        &Handle,
-                        &gEfiWatchdogTimerArchProtocolGuid,
-                        &gWatchdogTimer,
-                        NULL
-                        );
+        Status = mInterruptProtocol->SetTriggerType (
+                   mInterruptProtocol,
+                   FixedPcdGet32 (PcdGenericWatchdogEl2IntrNum),
+                   EFI_HARDWARE_INTERRUPT2_TRIGGER_EDGE_RISING
+                   );
+        if (!EFI_ERROR (Status)) {
+          // Install the Timer Architectural Protocol onto a new handle
+          Handle = NULL;
+          Status = gBS->InstallMultipleProtocolInterfaces (
+                          &Handle,
+                          &gEfiWatchdogTimerArchProtocolGuid,
+                          &gWatchdogTimer,
+                          NULL
+                          );
+        }
       }
     }
   }
-- 
Guid("CE165669-3EF3-493F-B85D-6190EE5B9759")

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