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fdt: Add function to return next compatible subnode

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We need to iterate through subnodes of a parent, looking only at
compatible nodes. Add a utility function to do this for us.

Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Tom Warren <twarren@nvidia.com>
This commit is contained in:
Simon Glass
2012-04-02 13:18:42 +00:00
committed by Albert ARIBAUD
parent 96875e7d3b
commit 3ddecfc740
2 changed files with 32 additions and 0 deletions
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15
lib/fdtdec.c
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@@ -133,6 +133,21 @@ int fdtdec_next_compatible(const void *blob, int node,
return fdt_node_offset_by_compatible(blob, node, compat_names[id]);
}
int fdtdec_next_compatible_subnode(const void *blob, int node,
enum fdt_compat_id id, int *depthp)
{
do {
node = fdt_next_node(blob, node, depthp);
} while (*depthp > 1);
/* If this is a direct subnode, and compatible, return it */
if (*depthp == 1 && 0 == fdt_node_check_compatible(
blob, node, compat_names[id]))
return node;
return -FDT_ERR_NOTFOUND;
}
int fdtdec_next_alias(const void *blob, const char *name,
enum fdt_compat_id id, int *upto)
{