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dm: fdt: Add a function to look up a chosen node

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Within /chosen we may have a node which points to another node, similar
to how /aliases works. Add a helper function to do this lookup.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass
2014-09-04 16:27:24 -06:00
parent addf9513d0
commit aac07d49d0
2 changed files with 27 additions and 0 deletions
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12
include/fdtdec.h
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@@ -374,6 +374,18 @@ int fdtdec_get_alias_seq(const void *blob, const char *base, int node,
*/
int fdtdec_get_alias_node(const void *blob, const char *name);
/**
* Get the offset of the given chosen node
*
* This looks up a property in /chosen containing the path to another node,
* then finds the offset of that node.
*
* @param blob Device tree blob (if NULL, then error is returned)
* @param name Property name, e.g. "stdout-path"
* @return Node offset referred to by that chosen node, or -ve FDT_ERR_...
*/
int fdtdec_get_chosen_node(const void *blob, const char *name);
/*
* Get the name for a compatible ID
*