diff --git a/drivers/net/ethernet/renesas/ravb.h b/drivers/net/ethernet/renesas/ravb.h
index 1c6e4df94f01..ac9195add811 100644
--- a/drivers/net/ethernet/renesas/ravb.h
+++ b/drivers/net/ethernet/renesas/ravb.h
@@ -1032,7 +1032,6 @@ struct ravb_private {
 	phy_interface_t phy_interface;
 	int msg_enable;
 	int speed;
-	int duplex;
 	int emac_irq;
 	enum ravb_chip_id chip_id;
 	int rx_irqs[NUM_RX_QUEUE];
diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c
index defed0d0c51d..ffc1ada4e6da 100644
--- a/drivers/net/ethernet/renesas/ravb_main.c
+++ b/drivers/net/ethernet/renesas/ravb_main.c
@@ -82,13 +82,6 @@ static int ravb_config(struct net_device *ndev)
 	return error;
 }
 
-static void ravb_set_duplex(struct net_device *ndev)
-{
-	struct ravb_private *priv = netdev_priv(ndev);
-
-	ravb_modify(ndev, ECMR, ECMR_DM, priv->duplex ? ECMR_DM : 0);
-}
-
 static void ravb_set_rate(struct net_device *ndev)
 {
 	struct ravb_private *priv = netdev_priv(ndev);
@@ -406,13 +399,11 @@ error:
 /* E-MAC init function */
 static void ravb_emac_init(struct net_device *ndev)
 {
-	struct ravb_private *priv = netdev_priv(ndev);
-
 	/* Receive frame limit set register */
 	ravb_write(ndev, ndev->mtu + ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN, RFLR);
 
 	/* EMAC Mode: PAUSE prohibition; Duplex; RX Checksum; TX; RX */
-	ravb_write(ndev, ECMR_ZPF | (priv->duplex ? ECMR_DM : 0) |
+	ravb_write(ndev, ECMR_ZPF | ECMR_DM |
 		   (ndev->features & NETIF_F_RXCSUM ? ECMR_RCSC : 0) |
 		   ECMR_TE | ECMR_RE, ECMR);
 
@@ -995,12 +986,6 @@ static void ravb_adjust_link(struct net_device *ndev)
 		ravb_rcv_snd_disable(ndev);
 
 	if (phydev->link) {
-		if (phydev->duplex != priv->duplex) {
-			new_state = true;
-			priv->duplex = phydev->duplex;
-			ravb_set_duplex(ndev);
-		}
-
 		if (phydev->speed != priv->speed) {
 			new_state = true;
 			priv->speed = phydev->speed;
@@ -1015,7 +1000,6 @@ static void ravb_adjust_link(struct net_device *ndev)
 		new_state = true;
 		priv->link = 0;
 		priv->speed = 0;
-		priv->duplex = -1;
 	}
 
 	/* Enable TX and RX right over here, if E-MAC change is ignored */
@@ -1045,7 +1029,6 @@ static int ravb_phy_init(struct net_device *ndev)
 
 	priv->link = 0;
 	priv->speed = 0;
-	priv->duplex = -1;
 
 	/* Try connecting to PHY */
 	pn = of_parse_phandle(np, "phy-handle", 0);
@@ -1088,6 +1071,10 @@ static int ravb_phy_init(struct net_device *ndev)
 	phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_Pause_BIT);
 	phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_Asym_Pause_BIT);
 
+	/* Half Duplex is not supported */
+	phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_1000baseT_Half_BIT);
+	phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_100baseT_Half_BIT);
+
 	phy_attached_info(phydev);
 
 	return 0;