kselftest: dt: Ignore nodes that have ancestors disabled

Filter out nodes that have one of its ancestors disabled as they aren't
expected to probe.

This removes the following false-positive failures on the
sc7180-trogdor-lazor-limozeen-nots-r5 platform:

/soc@0/geniqup@8c0000/i2c@894000/proximity@28
/soc@0/geniqup@ac0000/spi@a90000/ec@0
/soc@0/remoteproc@62400000/glink-edge/apr
/soc@0/remoteproc@62400000/glink-edge/apr/service@3
/soc@0/remoteproc@62400000/glink-edge/apr/service@4
/soc@0/remoteproc@62400000/glink-edge/apr/service@4/clock-controller
/soc@0/remoteproc@62400000/glink-edge/apr/service@4/dais
/soc@0/remoteproc@62400000/glink-edge/apr/service@7
/soc@0/remoteproc@62400000/glink-edge/apr/service@7/dais
/soc@0/remoteproc@62400000/glink-edge/apr/service@8
/soc@0/remoteproc@62400000/glink-edge/apr/service@8/routing
/soc@0/remoteproc@62400000/glink-edge/fastrpc
/soc@0/remoteproc@62400000/glink-edge/fastrpc/compute-cb@3
/soc@0/remoteproc@62400000/glink-edge/fastrpc/compute-cb@4
/soc@0/remoteproc@62400000/glink-edge/fastrpc/compute-cb@5
/soc@0/spmi@c440000/pmic@0/pon@800/pwrkey

Fixes: 14571ab1ad21 ("kselftest: Add new test for detecting unprobed Devicetree devices")
Signed-off-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
Link: https://lore.kernel.org/r/20240729-dt-kselftest-parent-disabled-v2-1-d7a001c4930d@collabora.com
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>

diff --git a/tools/testing/selftests/dt/test_unprobed_devices.sh b/tools/testing/selftests/dt/test_unprobed_devices.sh
index 2d7e70c5ad2d36d0849a4c923fff64156e3841ca..5e3f42ef249eec7af1695c82a81df99e91ed1c98 100755 (executable)
--- a/tools/testing/selftests/dt/test_unprobed_devices.sh
+++ b/tools/testing/selftests/dt/test_unprobed_devices.sh
@@ -34,8 +34,21 @@ nodes_compatible=$(
                # Check if node is available
                if [[ -e "${node}"/status ]]; then
                        status=$(tr -d '\000' < "${node}"/status)
-                       [[ "${status}" != "okay" && "${status}" != "ok" ]] && continue
+                       if [[ "${status}" != "okay" && "${status}" != "ok" ]]; then
+                               if [ -n "${disabled_nodes_regex}" ]; then
+                                       disabled_nodes_regex="${disabled_nodes_regex}|${node}"
+                               else
+                                       disabled_nodes_regex="${node}"
+                               fi
+                               continue
+                       fi
                fi
+
+               # Ignore this node if one of its ancestors was disabled
+               if [ -n "${disabled_nodes_regex}" ]; then
+                       echo "${node}" | grep -q -E "${disabled_nodes_regex}" && continue
+               fi
+
                echo "${node}" | sed -e 's|\/proc\/device-tree||'
        done | sort
        )