const void *of_get_mac_address(const struct device_node *np);
#define for_each_child_node(parent, child) \
for (child = of_get_next_child(parent, NULL); child != NULL; \
child = of_get_next_child(parent, child))
const void *of_get_mac_address(const struct device_node *np);
#define for_each_child_node(parent, child) \
for (child = of_get_next_child(parent, NULL); child != NULL; \
child = of_get_next_child(parent, child))