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Allow device tree to be modified by additonal device tree sections

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This patch allows the following construct:

/ {
	property-a = "old";
	property-b = "does not change";
};

/ {
	property-a = "changed";
	property-c = "new";
	node-a {
	};
};

Where the later device tree overrides the properties found in the
earlier tree.  This is useful for laying down a template device tree
in an include file and modifying it for a specific board without having
to clone the entire tree.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
This commit is contained in:
Grant Likely 2010-02-25 09:58:29 -07:00 • committed by Jon Loeliger
parent 716418849a
commit 83da1b2a4e
7 changed files with 214 additions and 6 deletions
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dtc.h
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@ -174,6 +174,7 @@ struct property *reverse_properties(struct property *first);
struct node *build_node(struct property *proplist, struct node *children);
struct node *name_node(struct node *node, char *name);
struct node *chain_node(struct node *first, struct node *list);
struct node *merge_nodes(struct node *old_node, struct node *new_node);
void add_property(struct node *node, struct property *prop);
void add_child(struct node *parent, struct node *child);