diff --git a/drivers/net/phy/marvell10g.c b/drivers/net/phy/marvell10g.c
index daed73a..7d080d5 100644
--- a/drivers/net/phy/marvell10g.c
+++ b/drivers/net/phy/marvell10g.c
@@ -516,6 +516,7 @@ static void mv3310_update_interface(struct phy_device *phydev)
 
 	if ((phydev->interface == PHY_INTERFACE_MODE_SGMII ||
 	     phydev->interface == PHY_INTERFACE_MODE_2500BASEX ||
+	     phydev->interface == PHY_INTERFACE_MODE_5GBASER ||
 	     phydev->interface == PHY_INTERFACE_MODE_10GKR) && phydev->link) {
 		/* The PHY automatically switches its serdes interface (and
 		 * active PHYXS instance) between Cisco SGMII, 10GBase-KR and
@@ -527,6 +528,9 @@ static void mv3310_update_interface(struct phy_device *phydev)
 		case SPEED_10000:
 			phydev->interface = PHY_INTERFACE_MODE_10GKR;
 			break;
+		case SPEED_5000:
+			phydev->interface = PHY_INTERFACE_MODE_5GBASER;
+			break;
 		case SPEED_2500:
 			phydev->interface = PHY_INTERFACE_MODE_2500BASEX;
 			break;
diff --git a/drivers/net/phy/phylink.c b/drivers/net/phy/phylink.c
index b3f25a9..6a38a1c 100644
--- a/drivers/net/phy/phylink.c
+++ b/drivers/net/phy/phylink.c
@@ -299,6 +299,10 @@ static int phylink_parse_mode(struct phylink *pl, struct fwnode_handle *fwnode)
 			phylink_set(pl->supported, 2500baseX_Full);
 			break;
 
+		case PHY_INTERFACE_MODE_5GBASER:
+			phylink_set(pl->supported, 5000baseT_Full);
+			break;
+
 		case PHY_INTERFACE_MODE_10GKR:
 			phylink_set(pl->supported, 10baseT_Half);
 			phylink_set(pl->supported, 10baseT_Full);
diff --git a/drivers/net/phy/sfp-bus.c b/drivers/net/phy/sfp-bus.c
index 0d5ac2a..a702c9b 100644
--- a/drivers/net/phy/sfp-bus.c
+++ b/drivers/net/phy/sfp-bus.c
@@ -302,6 +302,9 @@ phy_interface_t sfp_select_interface(struct sfp_bus *bus,
 	    phylink_test(link_modes, 10000baseT_Full))
 		return PHY_INTERFACE_MODE_10GKR;
 
+	if (phylink_test(link_modes, 5000baseT_Full))
+		return PHY_INTERFACE_MODE_5GBASER;
+
 	if (phylink_test(link_modes, 2500baseX_Full))
 		return PHY_INTERFACE_MODE_2500BASEX;
 
diff --git a/include/linux/phy.h b/include/linux/phy.h
index 34bdd16..77fad08 100644
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
@@ -98,6 +98,7 @@ typedef enum {
 	PHY_INTERFACE_MODE_TRGMII,
 	PHY_INTERFACE_MODE_1000BASEX,
 	PHY_INTERFACE_MODE_2500BASEX,
+	PHY_INTERFACE_MODE_5GBASER,
 	PHY_INTERFACE_MODE_RXAUI,
 	PHY_INTERFACE_MODE_XAUI,
 	/* 10GBASE-KR, XFI, SFI - single lane 10G Serdes */
@@ -172,6 +173,8 @@ static inline const char *phy_modes(phy_interface_t interface)
 		return "1000base-x";
 	case PHY_INTERFACE_MODE_2500BASEX:
 		return "2500base-x";
+	case PHY_INTERFACE_MODE_5GBASER:
+		return "5gbase-r";
 	case PHY_INTERFACE_MODE_RXAUI:
 		return "rxaui";
 	case PHY_INTERFACE_MODE_XAUI: