--- zzzz-none-000/linux-4.4.271/include/linux/of.h	2021-06-03 06:22:09.000000000 +0000
+++ hawkeye-5590-750/linux-4.4.271/include/linux/of.h	2023-04-19 10:22:30.000000000 +0000
@@ -75,6 +75,23 @@
 	uint32_t args[MAX_PHANDLE_ARGS];
 };
 
+struct of_phandle_iterator {
+	/* Common iterator information */
+	const char *cells_name;
+	int cell_count;
+	const struct device_node *parent;
+
+	/* List size information */
+	const __be32 *list_end;
+	const __be32 *phandle_end;
+
+	/* Current position state */
+	const __be32 *cur;
+	uint32_t cur_count;
+	phandle phandle;
+	struct device_node *node;
+};
+
 struct of_reconfig_data {
 	struct device_node	*dn;
 	struct property		*prop;
@@ -336,6 +353,18 @@
 extern int of_count_phandle_with_args(const struct device_node *np,
 	const char *list_name, const char *cells_name);
 
+/* phandle iterator functions */
+extern int of_phandle_iterator_init(struct of_phandle_iterator *it,
+				    const struct device_node *np,
+				    const char *list_name,
+				    const char *cells_name,
+				    int cell_count);
+
+extern int of_phandle_iterator_next(struct of_phandle_iterator *it);
+extern int of_phandle_iterator_args(struct of_phandle_iterator *it,
+				    uint32_t *args,
+				    int size);
+
 extern void of_alias_scan(void * (*dt_alloc)(u64 size, u64 align));
 extern int of_alias_get_id(struct device_node *np, const char *stem);
 extern int of_alias_get_highest_id(const char *stem);
@@ -616,6 +645,27 @@
 	return -ENOSYS;
 }
 
+static inline int of_phandle_iterator_init(struct of_phandle_iterator *it,
+					   const struct device_node *np,
+					   const char *list_name,
+					   const char *cells_name,
+					   int cell_count)
+{
+	return -ENOSYS;
+}
+
+static inline int of_phandle_iterator_next(struct of_phandle_iterator *it)
+{
+	return -ENOSYS;
+}
+
+static inline int of_phandle_iterator_args(struct of_phandle_iterator *it,
+					   uint32_t *args,
+					   int size)
+{
+	return 0;
+}
+
 static inline int of_alias_get_id(struct device_node *np, const char *stem)
 {
 	return -ENOSYS;
@@ -876,6 +926,12 @@
 	return of_property_read_u32(np, propname, (u32*) out_value);
 }
 
+#define of_for_each_phandle(it, err, np, ln, cn, cc)			\
+	for (of_phandle_iterator_init((it), (np), (ln), (cn), (cc)),	\
+	     err = of_phandle_iterator_next(it);			\
+	     err == 0;							\
+	     err = of_phandle_iterator_next(it))
+
 #define of_property_for_each_u32(np, propname, prop, p, u)	\
 	for (prop = of_find_property(np, propname, NULL),	\
 		p = of_prop_next_u32(prop, NULL, &u);		\