--- zzzz-none-000/linux-4.4.60/drivers/of/of_mdio.c	2017-04-08 07:53:53.000000000 +0000
+++ hawkeye-5590-729/linux-4.4.60/drivers/of/of_mdio.c	2022-03-30 14:21:52.000000000 +0000
@@ -41,7 +41,7 @@
 	return -EINVAL;
 }
 
-static int of_mdiobus_register_phy(struct mii_bus *mdio, struct device_node *child,
+int of_mdiobus_register_phy(struct mii_bus *mdio, struct device_node *child,
 				   u32 addr)
 {
 	struct phy_device *phy;
@@ -91,6 +91,7 @@
 
 	return 0;
 }
+EXPORT_SYMBOL(of_mdiobus_register_phy);
 
 int of_mdio_parse_addr(struct device *dev, const struct device_node *np)
 {