[POWERPC] bootwrapper: Make ft_get_parent() return a phandle, and NULL if already top-level.

Most of ft_get_parent() is factored out into __ft_get_parent(), which
deals only in internal node pointers.  The ft_get_parent() wrapper
handles phandle conversion in both directions (previously,
ft_get_parent() did not convert its return value).

It also now returns NULL as the parent of the toplevel node, rather than
just returning the toplevel node again (which made it rather useless in
loops).

Signed-off-by: Scott Wood <scottwood@freescale.com>
Acked-by: Mark A. Greer <mgreer@mvista.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/arch/powerpc/boot/flatdevtree.h b/arch/powerpc/boot/flatdevtree.h
index 1f37ca2d34f6..950042493fb7 100644
--- a/arch/powerpc/boot/flatdevtree.h
+++ b/arch/powerpc/boot/flatdevtree.h
@@ -104,5 +104,6 @@ int ft_get_prop(struct ft_cxt *cxt, const void *phandle, const char *propname,
                 void *buf, const unsigned int buflen);
 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);
 
 #endif /* FLATDEVTREE_H */