diff --git a/common/hw-gfx-gma-i2c.ads b/common/hw-gfx-gma-i2c.ads
new file mode 100644
index 0000000..85f90dc
--- /dev/null
+++ b/common/hw-gfx-gma-i2c.ads
@@ -0,0 +1,25 @@
+--
+-- Copyright (C) 2016 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; version 2 of the License.
+--
+-- 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.
+--
+
+with HW.GFX.I2C;
+
+private package HW.GFX.GMA.I2C is
+
+   procedure I2C_Read
+     (Port     : in     PCH_Port;
+      Address  : in     HW.GFX.I2C.Transfer_Address;
+      Length   : in out HW.GFX.I2C.Transfer_Length;
+      Data     :    out HW.GFX.I2C.Transfer_Data;
+      Success  :    out Boolean);
+
+end HW.GFX.GMA.I2C;