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diff --git a/Vlv2DeviceRefCodePkg/ValleyView2Soc/SouthCluster/Include/PchRegs/PchRegsHda.h b/Vlv2DeviceRefCodePkg/ValleyView2Soc/SouthCluster/Include/PchRegs/PchRegsHda.h
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+/**
+
+Copyright (c) 2012  - 2014, Intel Corporation. All rights reserved
+
+  This program and the accompanying materials are licensed and made available under
+  the terms and conditions of the BSD License that accompanies this distribution.
+  The full text of the license may be found at
+  http://opensource.org/licenses/bsd-license.php.
+
+  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+
+
+  @file
+  PchRegsHda.h
+
+  @brief
+  Register names for PCH High Definition Audio device.
+
+  Conventions:
+
+  - Prefixes:
+    Definitions beginning with "R_" are registers
+    Definitions beginning with "B_" are bits within registers
+    Definitions beginning with "V_" are meaningful values of bits within the registers
+    Definitions beginning with "S_" are register sizes
+    Definitions beginning with "N_" are the bit position
+  - In general, PCH registers are denoted by "_PCH_" in register names
+  - Registers / bits that are different between PCH generations are denoted by
+    "_PCH_<generation_name>_" in register/bit names. e.g., "_PCH_VLV_"
+  - Registers / bits that are different between SKUs are denoted by "_<SKU_name>"
+    at the end of the register/bit names
+  - Registers / bits of new devices introduced in a PCH generation will be just named
+    as "_PCH_" without <generation_name> inserted.
+
+**/
+#ifndef _PCH_REGS_HDA_H_
+#define _PCH_REGS_HDA_H_
+
+///
+/// Azalia Controller Registers (D27:F0)
+///
+#define PCI_DEVICE_NUMBER_PCH_AZALIA       27
+#define PCI_FUNCTION_NUMBER_PCH_AZALIA     0
+
+#define R_PCH_HDA_PCS                      0x54  // Power Management Control and Status
+#define B_PCH_HDA_PCS_DATA                 0xFF000000 // Data, does not apply
+#define B_PCH_HDA_PCS_CCE                  BIT23 // Bus Power Control Enable, does not apply
+#define B_PCH_HDA_PCS_PMES                 BIT15 // PME Status
+#define B_PCH_HDA_PCS_PMEE                 BIT8  // PME Enable
+#define B_PCH_HDA_PCS_PS                   (BIT1 | BIT0) // Power State - D0/D3 Hot
+#define V_PCH_HDA_PCS_PS0                  0x00
+#define V_PCH_HDA_PCS_PS3                  0x03
+
+#endif