diff --git a/plat/mediatek/drivers/apusys/apusys.h b/plat/mediatek/drivers/apusys/apusys.h
index 5fdd2ec..1592cff 100644
--- a/plat/mediatek/drivers/apusys/apusys.h
+++ b/plat/mediatek/drivers/apusys/apusys.h
@@ -9,4 +9,10 @@
 
 #define MODULE_TAG "[APUSYS]"
 
+enum MTK_APUSYS_KERNEL_OP {
+	MTK_APUSYS_KERNEL_OP_APUSYS_PWR_TOP_ON,	/*  0 */
+	MTK_APUSYS_KERNEL_OP_APUSYS_PWR_TOP_OFF,/*  1 */
+	MTK_APUSYS_KERNEL_OP_NUM,
+};
+
 #endif