diff --git a/drivers/staging/greybus/greybus_manifest.h b/drivers/staging/greybus/greybus_manifest.h
index c36c4d1d30f9..947b71c88134 100644
--- a/drivers/staging/greybus/greybus_manifest.h
+++ b/drivers/staging/greybus/greybus_manifest.h
@@ -40,8 +40,8 @@ enum greybus_protocol {
 	GREYBUS_PROTOCOL_LIGHTS		= 0x0f,
 	GREYBUS_PROTOCOL_VIBRATOR	= 0x10,
 	GREYBUS_PROTOCOL_LOOPBACK	= 0x11,
-	/* 0x12 is unused */
-	/* 0x13 is unused */
+	GREYBUS_PROTOCOL_AUDIO_MGMT	= 0x12,
+	GREYBUS_PROTOCOL_AUDIO_DATA	= 0x13,
 	GREYBUS_PROTOCOL_SVC            = 0x14,
 	GREYBUS_PROTOCOL_FIRMWARE	= 0x15,
 		/* ... */
@@ -68,8 +68,8 @@ enum greybus_class_type {
 	GREYBUS_CLASS_LIGHTS		= 0x0f,
 	GREYBUS_CLASS_VIBRATOR		= 0x10,
 	GREYBUS_CLASS_LOOPBACK		= 0x11,
-	/* 0x12 is unused */
-	/* 0x13 is unused */
+	GREYBUS_CLASS_AUDIO_MGMT	= 0x12,
+	GREYBUS_CLASS_AUDIO_DATA	= 0x13,
 	GREYBUS_CLASS_SVC		= 0x14,
 	GREYBUS_CLASS_FIRMWARE		= 0x15,
 		/* ... */