if (fm_info_get_enet_if(port) == PHY_INTERFACE_MODE_RGMII) {
                if (port == FM1_DTSEC3) {
                        fdt_set_phy_handle(fdt, compat, addr, "rgmii_phy2");
-                       fdt_setprop(fdt, offset, "phy-connection-type",
-                                   "rgmii", 5);
+                       fdt_setprop_string(fdt, offset, "phy-connection-type",
+                                          "rgmii");
                        fdt_status_okay_by_alias(fdt, "emi1_rgmii1");
                }
        } else if (fm_info_get_enet_if(port) == PHY_INTERFACE_MODE_SGMII) {
                        break;
                }
                fdt_delprop(fdt, offset, "phy-connection-type");
-               fdt_setprop(fdt, offset, "phy-connection-type", "qsgmii", 6);
+               fdt_setprop_string(fdt, offset, "phy-connection-type",
+                                  "qsgmii");
                fdt_status_okay_by_alias(fdt, "emi1_slot2");
        } else if (fm_info_get_enet_if(port) == PHY_INTERFACE_MODE_XGMII) {
                /* XFI interface */
                /* no PHY for XFI */
                fdt_delprop(fdt, offset, "phy-handle");
                fdt_setprop(fdt, offset, "fixed-link", &f_link, sizeof(f_link));
-               fdt_setprop(fdt, offset, "phy-connection-type", "xgmii", 5);
+               fdt_setprop_string(fdt, offset, "phy-connection-type", "xgmii");
        }
 }
 
 
             (fm_info_get_enet_if(port) == PHY_INTERFACE_MODE_SGMII)) &&
                        (port == FM1_DTSEC3)) {
                fdt_set_phy_handle(fdt, compat, addr, "sg_2500_aqr105_phy4");
-               fdt_setprop(fdt, offset, "phy-connection-type",
-                           "sgmii-2500", 10);
+               fdt_setprop_string(fdt, offset, "phy-connection-type",
+                                  "sgmii-2500");
                fdt_status_disabled_by_alias(fdt, "xg_aqr105_phy3");
        }
 #endif