diff --git a/include/linux/phy/phy.h b/include/linux/phy/phy.h
index b1413757fcc3..87ae8c27ec57 100644
--- a/include/linux/phy/phy.h
+++ b/include/linux/phy/phy.h
@@ -42,7 +42,8 @@ enum phy_mode {
 	PHY_MODE_MIPI_DPHY,
 	PHY_MODE_SATA,
 	PHY_MODE_LVDS,
-	PHY_MODE_DP
+	PHY_MODE_DP,
+	PHY_MODE_TTL
 };
 
 enum phy_media {