diff --git a/drivers/staging/greybus/greybus_manifest.h b/drivers/staging/greybus/greybus_manifest.h
index b9504c723a75..86ebc0abe601 100644
--- a/drivers/staging/greybus/greybus_manifest.h
+++ b/drivers/staging/greybus/greybus_manifest.h
@@ -23,7 +23,7 @@ enum greybus_descriptor_type {
 
 enum greybus_protocol {
 	GREYBUS_PROTOCOL_CONTROL	= 0x00,
-	GREYBUS_PROTOCOL_AP		= 0x01,
+	/* 0x01 is unused */
 	GREYBUS_PROTOCOL_GPIO		= 0x02,
 	GREYBUS_PROTOCOL_I2C		= 0x03,
 	GREYBUS_PROTOCOL_UART		= 0x04,
@@ -52,7 +52,7 @@ enum greybus_protocol {
 
 enum greybus_class_type {
 	GREYBUS_CLASS_CONTROL		= 0x00,
-	GREYBUS_CLASS_AP		= 0x01,
+	/* 0x01 is unused */
 	GREYBUS_CLASS_GPIO		= 0x02,
 	GREYBUS_CLASS_I2C		= 0x03,
 	GREYBUS_CLASS_UART		= 0x04,