Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=8941c0c495e8765206ec1017b1e069ce41bf6e8f
Commit: 8941c0c495e8765206ec1017b1e069ce41bf6e8f
Parent: a9ec7669fc07f80f6e39807f1ac319764a304319
Author: Scott Wood <[EMAIL PROTECTED]>
AuthorDate: Mon Mar 12 14:41:58 2007 -0600
Committer: Paul Mackerras <[EMAIL PROTECTED]>
CommitDate: Fri Mar 16 15:49:14 2007 +1100
[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 <[EMAIL PROTECTED]>
Acked-by: Mark A. Greer <[EMAIL PROTECTED]>
Signed-off-by: Paul Mackerras <[EMAIL PROTECTED]>
---
arch/powerpc/boot/flatdevtree.c | 65 +++++++++++++++++++++++++++++++++++++++
arch/powerpc/boot/flatdevtree.h | 3 ++
2 files changed, 68 insertions(+), 0 deletions(-)
diff --git a/arch/powerpc/boot/flatdevtree.c b/arch/powerpc/boot/flatdevtree.c
index 88b178a..f6e37c2 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)
{
diff --git a/arch/powerpc/boot/flatdevtree.h b/arch/powerpc/boot/flatdevtree.h
index 9500424..e3e3e79 100644
--- a/arch/powerpc/boot/flatdevtree.h
+++ b/arch/powerpc/boot/flatdevtree.h
@@ -105,5 +105,8 @@ int ft_get_prop(struct ft_cxt *cxt, const void *phandle,
const char *propname,
int ft_set_prop(struct ft_cxt *cxt, const void *phandle, const char *propname,
const void *buf, const unsigned int buflen);
void *ft_get_parent(struct ft_cxt *cxt, const void *phandle);
+void *ft_find_node_by_prop_value(struct ft_cxt *cxt, const void *prev,
+ const char *propname, const char *propval,
+ int proplen);
#endif /* FLATDEVTREE_H */
-
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