--- a/drivers/net/ethernet/lantiq_xrx200.c
+++ b/drivers/net/ethernet/lantiq_xrx200.c
@@ -101,8 +101,8 @@
 #define MDIO_PHY_SPEED_M100	0x0800
 #define MDIO_PHY_SPEED_G1	0x1000
 
-#define MDIO_PHY_FDUP_EN	0x0600
-#define MDIO_PHY_FDUP_DIS	0x0200
+#define MDIO_PHY_FDUP_EN	0x0200
+#define MDIO_PHY_FDUP_DIS	0x0600
 
 #define MDIO_PHY_LINK_MASK	0x6000
 #define MDIO_PHY_SPEED_MASK	0x1800
