d75b33af67
Currently, the Linux kernel, libfdt and dtc, when using flattened
device trees encode a node's phandle into a property named
"linux,phandle". The ePAPR specification, however - aiming as it is
to not be a Linux specific spec - requires that phandles be encoded in
a property named simply "phandle".
This patch adds support for this newer approach to dtc and libfdt.
Specifically:
- fdt_get_phandle() will now return the correct phandle if it
is supplied in either of these properties
- fdt_node_offset_by_phandle() will correctly find a node with
the given phandle encoded in either property.
- By default, when auto-generating phandles, dtc will encode
it into both properties for maximum compatibility. A new -H
option allows either only old-style or only new-style
properties to be generated.
- If phandle properties are explicitly supplied in the dts
file, dtc will not auto-generate ones in the alternate format.
- If both properties are supplied, dtc will check that they
have the same value.
- Some existing testcases are updated to use a mix of old and
new-style phandles, partially testing the changes.
- A new phandle_format test further tests the libfdt support,
and the -H option.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
37 lines
556 B
Text
37 lines
556 B
Text
/dts-v1/;
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/memreserve/ 0xdeadbeef00000000 0x100000;
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/memreserve/ 123456789 010000;
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/ {
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compatible = "test_tree1";
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prop-int = <0xdeadbeef>;
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prop-str = "hello world";
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subnode@1 {
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compatible = "subnode1";
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prop-int = [deadbeef];
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subsubnode {
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compatible = "subsubnode1", "subsubnode";
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prop-int = <0xdeadbeef>;
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};
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ss1 {
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};
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};
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subnode@2 {
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linux,phandle = <0x2000>;
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prop-int = <123456789>;
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subsubnode@0 {
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phandle = <0x2001>;
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compatible = "subsubnode2", "subsubnode";
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prop-int = <0726746425>;
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};
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ss2 {
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};
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};
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};
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