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core: ofnode: add ofnode_get_parent function

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The Rockchip video drivers need to walk the ofnode-parrents to find
an enclosing device that has a UCLASS_DISPLAY driver bound.  This
adds a ofnode_get_parent()-function that returns the parent-node.

Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Tested-by: Klaus Goger <klaus.goger@theobroma-systems.com>
Reviewed-by: Anatolij Gustschin <agust@denx.de>
This commit is contained in:
Philipp Tomsich 2018-02-23 17:38:49 +01:00 committed by Anatolij Gustschin
parent f0f6917188
commit e2d5997ffd
2 changed files with 22 additions and 0 deletions
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14
drivers/core/ofnode.c
View file

@ -165,6 +165,20 @@ ofnode ofnode_next_subnode(ofnode node)
fdt_next_subnode(gd->fdt_blob, ofnode_to_offset(node))); fdt_next_subnode(gd->fdt_blob, ofnode_to_offset(node)));
} }
ofnode ofnode_get_parent(ofnode node)
{
ofnode parent;
assert(ofnode_valid(node));
if (ofnode_is_np(node))
parent = np_to_ofnode(of_get_parent(ofnode_to_np(node)));
else
parent.of_offset = fdt_parent_offset(gd->fdt_blob,
ofnode_to_offset(node));
return parent;
}
const char *ofnode_get_name(ofnode node) const char *ofnode_get_name(ofnode node)
{ {
assert(ofnode_valid(node)); assert(ofnode_valid(node));

8
include/dm/ofnode.h
View file

@ -301,6 +301,14 @@ ofnode ofnode_first_subnode(ofnode node);
*/ */
ofnode ofnode_next_subnode(ofnode node); ofnode ofnode_next_subnode(ofnode node);
/**
* ofnode_get_parent() - get the ofnode's parent (enclosing ofnode)
*
* @node: valid node to look up
* @return ofnode reference of the parent node
*/
ofnode ofnode_get_parent(ofnode node);
/** /**
* ofnode_get_name() - get the name of a node * ofnode_get_name() - get the name of a node
* *