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Support ePAPR compliant phandle properties

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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>
This commit is contained in:
David Gibson 2009-11-26 15:37:13 +11:00 • committed by Jon Loeliger
parent 0ef21055ee
commit d75b33af67
13 changed files with 177 additions and 30 deletions
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6
tests/run_tests.sh
View file

@ -218,6 +218,12 @@ dtc_tests () {
run_dtc_test -I dts -O dtb -o dtc_path-references.test.dtb path-references.dts
run_test path-references dtc_path-references.test.dtb
run_test phandle_format dtc_references.test.dtb both
for f in legacy epapr both; do
run_dtc_test -I dts -O dtb -H $f -o dtc_references.test.$f.dtb references.dts
run_test phandle_format dtc_references.test.$f.dtb $f
done
run_dtc_test -I dts -O dtb -o dtc_comments.test.dtb comments.dts
run_dtc_test -I dts -O dtb -o dtc_comments-cmp.test.dtb comments-cmp.dts
run_test dtbs_equal_ordered dtc_comments.test.dtb dtc_comments-cmp.test.dtb