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authorMichael Ellerman <michael@ellerman.id.au>2008-11-12 18:54:42 +0000
committerPaul Mackerras <paulus@samba.org>2008-11-19 16:05:00 +1100
commit1e291b14c8f1101b9093434489bd4dc0e03f3d0f (patch)
treeea602cce082e847d693b021d83f1314e9494c9a9 /include/linux/of.h
parentae564c63b8311fa73c21e456e00dba1f4b1ff6bc (diff)
of: Add helpers for finding device nodes which have a given property
This commit adds a routine for finding a device node which has a certain property. The contents of the property are not taken into account, merely the presence or absence of the property. Based on that routine, we add a for_each_ macro for iterating over all nodes that have a certain property. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'include/linux/of.h')
-rw-r--r--include/linux/of.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/of.h b/include/linux/of.h
index e2488f5e7cb2..6a7efa242f5e 100644
--- a/include/linux/of.h
+++ b/include/linux/of.h
@@ -57,6 +57,12 @@ extern struct device_node *of_get_next_child(const struct device_node *node,
for (child = of_get_next_child(parent, NULL); child != NULL; \
child = of_get_next_child(parent, child))
+extern struct device_node *of_find_node_with_property(
+ struct device_node *from, const char *prop_name);
+#define for_each_node_with_property(dn, prop_name) \
+ for (dn = of_find_node_with_property(NULL, prop_name); dn; \
+ dn = of_find_node_with_property(dn, prop_name))
+
extern struct property *of_find_property(const struct device_node *np,
const char *name,
int *lenp);