diff --git a/common/broxton/hw-gfx-gma-ddi_phy.ads b/common/broxton/hw-gfx-gma-ddi_phy.ads
new file mode 100644
index 0000000..89f19f0
--- /dev/null
+++ b/common/broxton/hw-gfx-gma-ddi_phy.ads
@@ -0,0 +1,22 @@
+--
+-- Copyright (C) 2017 secunet Security Networks AG
+--
+-- This program is free software; you can redistribute it and/or modify
+-- it under the terms of the GNU General Public License as published by
+-- the Free Software Foundation; either version 2 of the License, or
+-- (at your option) any later version.
+--
+-- This program is distributed in the hope that it will be useful,
+-- but WITHOUT ANY WARRANTY; without even the implied warranty of
+-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+-- GNU General Public License for more details.
+--
+
+private package HW.GFX.GMA.DDI_Phy is
+
+   type T is (BC, A);
+
+   procedure Power_On (Phy : T) is null;
+   procedure Power_Off (Phy : T) is null;
+
+end HW.GFX.GMA.DDI_Phy;