diff --git a/include/linux/mdio.h b/include/linux/mdio.h
index 00177567cfef..f7fbbf3069e7 100644
--- a/include/linux/mdio.h
+++ b/include/linux/mdio.h
@@ -488,6 +488,19 @@ static inline int mdiobus_c45_write(struct mii_bus *bus, int prtad, int devad,
 	return mdiobus_write(bus, prtad, mdiobus_c45_addr(devad, regnum), val);
 }
 
+static inline int mdiodev_c45_read(struct mdio_device *mdiodev, int devad,
+				   u16 regnum)
+{
+	return mdiobus_c45_read(mdiodev->bus, mdiodev->addr, devad, regnum);
+}
+
+static inline int mdiodev_c45_write(struct mdio_device *mdiodev, u32 devad,
+				    u16 regnum, u16 val)
+{
+	return mdiobus_c45_write(mdiodev->bus, mdiodev->addr, devad, regnum,
+				 val);
+}
+
 int mdiobus_register_device(struct mdio_device *mdiodev);
 int mdiobus_unregister_device(struct mdio_device *mdiodev);
 bool mdiobus_is_registered_device(struct mii_bus *bus, int addr);