--- zzzz-none-000/linux-4.4.271/include/linux/of_net.h	2021-06-03 06:22:09.000000000 +0000
+++ hawkeye-5590-750/linux-4.4.271/include/linux/of_net.h	2023-04-19 10:22:30.000000000 +0000
@@ -13,6 +13,14 @@
 struct net_device;
 extern int of_get_phy_mode(struct device_node *np);
 extern const void *of_get_mac_address(struct device_node *np);
+#ifdef CONFIG_MTD
+extern int of_get_mac_address_mtd(struct device_node *np, unsigned char *mac);
+#else
+static inline int of_get_mac_address_mtd(struct device_node *np, unsigned char *mac)
+{
+	return -ENOENT;
+}
+#endif
 extern struct net_device *of_find_net_device_by_node(struct device_node *np);
 #else
 static inline int of_get_phy_mode(struct device_node *np)