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Multiple overlay fragments adding or deleting the same node is not
supported. An attempt to do so results in an incorrect devicetree.
The node name will be munged for the second add.
After adding this patch, the unittest messages will show:
Duplicate name in motor-1, renamed to "controller#1"
OF: overlay: of_overlay_apply() err=0
### dt-test ### of_overlay_fdt_apply() expected -22, ret=0, overlay_bad_add_dup_node
### dt-test ### FAIL of_unittest_overlay_high_level():2419 Adding overlay 'overlay_bad_add_dup_node' failed
...
### dt-test ### end of unittest - 210 passed, 1 failed
The incorrect (munged) node name "controller#1" can be seen in the
/proc filesystem:
$ pwd
/proc/device-tree/testcase-data-2/substation@100/motor-1
$ ls
compatible controller controller#1 name phandle spin
$ ls controller
power_bus
$ ls controller#1
power_bus_emergency
Tested-by: Alan Tull <atull@kernel.org>
Signed-off-by: Frank Rowand <frank.rowand@sony.com>
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