of_phandle_iterator_next
EXPORT_SYMBOL_GPL(of_phandle_iterator_next);
while ((rc = of_phandle_iterator_next(&it)) == 0)
err = of_phandle_iterator_next(it); \
err = of_phandle_iterator_next(it))
extern int of_phandle_iterator_next(struct of_phandle_iterator *it);