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Commit 8941c0c4 authored by Scott Wood's avatar Scott Wood Committed by Paul Mackerras
Browse files

[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: default avatarScott Wood <scottwood@freescale.com>
Acked-by: default avatarMark A. Greer <mgreer@mvista.com>
Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
parent a9ec7669

arch/powerpc/boot/flatdevtree.c

+65 −0
Original line number Diff line number Diff line
@@ -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)

{

arch/powerpc/boot/flatdevtree.h

+3 −0
Original line number Diff line number Diff line
@@ -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 */