of: Introduce struct of_phandle_iterator
This struct carrys all necessary information to iterate over
a list of phandles and extract the arguments. Add an
init-function for the iterator and make use of it in
__of_parse_phandle_with_args().
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Rob Herring <robh@kernel.org>
diff --git a/include/linux/of.h b/include/linux/of.h
index 7fcb681..0f187db 100644
--- a/include/linux/of.h
+++ b/include/linux/of.h
@@ -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;
@@ -334,6 +351,13 @@
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 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);
@@ -608,6 +632,15 @@
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_alias_get_id(struct device_node *np, const char *stem)
{
return -ENOSYS;