[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>
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@ -820,6 +820,71 @@ int ft_get_prop(struct ft_cxt *cxt, const void *phandle, const char *propname,
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return -1;
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}
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void *__ft_find_node_by_prop_value(struct ft_cxt *cxt, void *prev,
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const char *propname, const char *propval,
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unsigned int proplen)
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{
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struct ft_atom atom;
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char *p = ft_root_node(cxt);
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char *next;
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int past_prev = prev ? 0 : 1;
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int depth = -1;
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while ((next = ft_next(cxt, p, &atom)) != NULL) {
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const void *data;
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unsigned int size;
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switch (atom.tag) {
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case OF_DT_BEGIN_NODE:
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depth++;
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if (prev == p) {
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past_prev = 1;
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break;
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}
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if (!past_prev || depth < 1)
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break;
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data = __ft_get_prop(cxt, p, propname, &size);
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if (!data || size != proplen)
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break;
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if (memcmp(data, propval, size))
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break;
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return p;
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case OF_DT_END_NODE:
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if (depth-- == 0)
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return NULL;
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break;
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}
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p = next;
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}
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return NULL;
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}
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void *ft_find_node_by_prop_value(struct ft_cxt *cxt, const void *prev,
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const char *propname, const char *propval,
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int proplen)
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{
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void *node = NULL;
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if (prev) {
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node = ft_node_ph2node(cxt, prev);
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if (!node)
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return NULL;
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}
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node = __ft_find_node_by_prop_value(cxt, node, propname,
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propval, proplen);
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return ft_get_phandle(cxt, node);
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}
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int ft_set_prop(struct ft_cxt *cxt, const void *phandle, const char *propname,
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const void *buf, const unsigned int buflen)
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{
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@ -105,5 +105,8 @@ int ft_get_prop(struct ft_cxt *cxt, const void *phandle, const char *propname,
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int ft_set_prop(struct ft_cxt *cxt, const void *phandle, const char *propname,
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const void *buf, const unsigned int buflen);
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void *ft_get_parent(struct ft_cxt *cxt, const void *phandle);
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void *ft_find_node_by_prop_value(struct ft_cxt *cxt, const void *prev,
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const char *propname, const char *propval,
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int proplen);
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#endif /* FLATDEVTREE_H */
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