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authorScott Wood <scottwood@freescale.com>2007-03-12 14:41:58 -0600
committerPaul Mackerras <paulus@samba.org>2007-03-16 15:49:14 +1100
commit8941c0c495e8765206ec1017b1e069ce41bf6e8f (patch)
tree587fb6d8ccfa949f22299058e0f04a6f0cc8d169 /arch/powerpc/boot/flatdevtree.c
parenta9ec7669fc07f80f6e39807f1ac319764a304319 (diff)
[POWERPC] bootwrapper: Add ft_find_node_by_prop_value().
ft_find_node_by_prop_value() finds nodes with the specified property/value pair. Signed-off-by: Scott Wood <scottwood@freescale.com> Acked-by: Mark A. Greer <mgreer@mvista.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/boot/flatdevtree.c')
-rw-r--r--arch/powerpc/boot/flatdevtree.c65
1 files changed, 65 insertions, 0 deletions
diff --git a/arch/powerpc/boot/flatdevtree.c b/arch/powerpc/boot/flatdevtree.c
index 88b178a77e8..f6e37c2ee4d 100644
--- a/arch/powerpc/boot/flatdevtree.c
+++ b/arch/powerpc/boot/flatdevtree.c
@@ -820,6 +820,71 @@ int ft_get_prop(struct ft_cxt *cxt, const void *phandle, const char *propname,
return -1;
}
+void *__ft_find_node_by_prop_value(struct ft_cxt *cxt, void *prev,
+ const char *propname, const char *propval,
+ unsigned int proplen)
+{
+ struct ft_atom atom;
+ char *p = ft_root_node(cxt);
+ char *next;
+ int past_prev = prev ? 0 : 1;
+ int depth = -1;
+
+ while ((next = ft_next(cxt, p, &atom)) != NULL) {
+ const void *data;
+ unsigned int size;
+
+ switch (atom.tag) {
+ case OF_DT_BEGIN_NODE:
+ depth++;
+
+ if (prev == p) {
+ past_prev = 1;
+ break;
+ }
+
+ if (!past_prev || depth < 1)
+ break;
+
+ data = __ft_get_prop(cxt, p, propname, &size);
+ if (!data || size != proplen)
+ break;
+ if (memcmp(data, propval, size))
+ break;
+
+ return p;
+
+ case OF_DT_END_NODE:
+ if (depth-- == 0)
+ return NULL;
+
+ break;
+ }
+
+ p = next;
+ }
+
+ return NULL;
+}
+
+void *ft_find_node_by_prop_value(struct ft_cxt *cxt, const void *prev,
+ const char *propname, const char *propval,
+ int proplen)
+{
+ void *node = NULL;
+
+ if (prev) {
+ node = ft_node_ph2node(cxt, prev);
+
+ if (!node)
+ return NULL;
+ }
+
+ node = __ft_find_node_by_prop_value(cxt, node, propname,
+ propval, proplen);
+ return ft_get_phandle(cxt, node);
+}
+
int ft_set_prop(struct ft_cxt *cxt, const void *phandle, const char *propname,
const void *buf, const unsigned int buflen)
{