Support ePAPR compliant phandle properties
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>
diff --git a/tests/run_tests.sh b/tests/run_tests.sh
index 5d901c2..c532030 100755
--- a/tests/run_tests.sh
+++ b/tests/run_tests.sh
@@ -218,6 +218,12 @@
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