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diff --git a/audio/hal/audio_extn/pm.h b/audio/hal/audio_extn/pm.h
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+++ b/audio/hal/audio_extn/pm.h
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+/* Copyright (c) 2014, The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ *       copyright notice, this list of conditions and the following
+ *       disclaimer in the documentation and/or other materials provided
+ *       with the distribution.
+ *     * Neither the name of The Linux Foundation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef AUDIO_EXTN_PM_H
+#define AUDIO_EXTN_PM_H
+
+#include <errno.h>
+#include <math.h>
+#include <pthread.h>
+#include <stdlib.h>
+#include <fcntl.h>
+#include <pm-service.h>
+#include "audio_hw.h"
+#include <platform.h>
+#include <cutils/properties.h>
+#include <cutils/log.h>
+
+
+/* Client name to be registered with PM */
+#define PM_CLIENT_NAME "audio"
+/* Command to sysfs to unload image */
+#define UNLOAD_IMAGE "0"
+#define MAX_NAME_LEN 32
+#define BOOT_IMG_SYSFS_PATH "/sys/kernel/boot_adsp/boot"
+
+typedef struct {
+    //MAX_NAME_LEN defined in mdm_detect.h
+    char img_name[MAX_NAME_LEN];
+    //this handle is used by peripheral mgr
+    void *pm_handle;
+}s_audio_subsys;
+
+/* Vote to peripheral manager for required subsystem */
+int audio_extn_pm_vote (void);
+
+/* Unvote to peripheral manager */
+void audio_extn_pm_unvote (void);
+
+/* Get subsytem status notification from PM */
+void audio_extn_pm_event_notifier (void *client_data, enum pm_event event);
+
+#endif // AUDIO_EXTN_PM_H