of: Introduce of_for_each_phandle() helper macro
With this macro any user can easily iterate over a list of
phandles. The patch also converts __of_parse_phandle_with_args()
to make use of the macro.
The of_count_phandle_with_args() function is not converted,
because the macro hides the return value of of_phandle_iterator_init(),
which is needed in there.
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 1f5e108..b0b8071 100644
--- a/include/linux/of.h
+++ b/include/linux/of.h
@@ -908,6 +908,12 @@
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); \