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At present, unless OF_LIVE is enabled, ofnode only supports access to one
device tree, the control FDT. This is because only the node offset is
encoded in ofnode, with the tree being implicit.
This makes ofnode (without OF_LIVE) unsuitable for device tree fixups, as
implemented by ft_board_setup() and other such functions.
To solve this, we can use the top bits of the node offset to hold a tree
ID.
Add the definitions for this.
Signed-off-by: Simon Glass <sjg@chromium.org>
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Add a 'for_each' macro like we have for nodes.
Fix the comment for struct ofprop while we are here.
Signed-off-by: Simon Glass <sjg@chromium.org>
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Now that we support writing to ofnodes, the const is not accurate. Drop
it to avoid undesirable casting.
Also drop the ofnode_to_npw() which is now the same as ofnode_to_np().
Signed-off-by: Simon Glass <sjg@chromium.org>
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At present ofnode only works with a single device tree, for the most part.
This is the control FDT used by U-Boot.
When booting an OS we may obtain a different device tree and want to
modify it. Add some initial support for this into the ofnode API.
Note that we don't permit aliases in this other device tree, since the
of_access implementation maintains a list of aliases collected at
start-up. Also, we don't need aliases to do fixups in the other FDT. So
make sure that flat tree and live tree processing are consistent in this
area.
Signed-off-by: Simon Glass <sjg@chromium.org>
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This is used by a lot of files, but ofnode.h needs to include a lot of
header files. This can create dependency cycles, particularly with
global_data.h which must include various declarations.
Split the core delcarations into a separate file to fix this.
Signed-off-by: Simon Glass <sjg@chromium.org>
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