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diff --git a/src/include/usr/i2c/tpmddif.H b/src/include/usr/i2c/tpmddif.H
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+++ b/src/include/usr/i2c/tpmddif.H
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+/* IBM_PROLOG_BEGIN_TAG                                                   */
+/* This is an automatically generated prolog.                             */
+/*                                                                        */
+/* $Source: src/include/usr/i2c/tpmddif.H $                               */
+/*                                                                        */
+/* OpenPOWER HostBoot Project                                             */
+/*                                                                        */
+/* Contributors Listed Below - COPYRIGHT 2015                             */
+/* [+] International Business Machines Corp.                              */
+/*                                                                        */
+/*                                                                        */
+/* Licensed under the Apache License, Version 2.0 (the "License");        */
+/* you may not use this file except in compliance with the License.       */
+/* You may obtain a copy of the License at                                */
+/*                                                                        */
+/*     http://www.apache.org/licenses/LICENSE-2.0                         */
+/*                                                                        */
+/* Unless required by applicable law or agreed to in writing, software    */
+/* distributed under the License is distributed on an "AS IS" BASIS,      */
+/* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or        */
+/* implied. See the License for the specific language governing           */
+/* permissions and limitations under the License.                         */
+/*                                                                        */
+/* IBM_PROLOG_END_TAG                                                     */
+#ifndef __TPMDDIF_H
+#define __TPMDDIF_H
+
+namespace TPMDD
+{
+
+/**
+ * @brief Enumerations to select TPM
+*/
+enum tpm_chip_types_t
+{
+  TPM_PRIMARY   = 0,
+  TPM_BACKUP    = 1,
+  LAST_CHIP_TYPE,
+  FIRST_CHIP_TYPE = TPM_PRIMARY
+};
+
+/**
+ * @brief TPM Operation to perform
+*/
+enum tpm_op_types_t
+{
+    TPM_OP_READVENDORID = 0,   ///< Read Vendor/Dev ID from device, max 4 bytes
+    TPM_OP_TRANSMIT     = 1,   ///< Transmit/Receive command block to TPM
+    TPM_OP_LASTOP,
+    TPM_OP_FIRSTOP      = TPM_OP_READVENDORID
+};
+
+/**
+ *
+ * @brief Determine if targeted TPM is present and enabled in the system
+ *
+ * @param[in] i_target Target node
+ *
+ * @param[in] i_chip Select primary vs secondary TPM
+ *
+ * @return true if device is present
+ */
+bool tpmPresence ( TARGETING::Target * i_target,
+                   tpm_chip_types_t i_chip );
+
+
+};  // end namespace TPMDD
+
+#endif  // end __TPMDDIF_H
+