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#!/bin/bash
# SPDX-License-Identifier: GPL-2.0
#
# Copyright (c) 2023 Collabora Ltd
#
# Based on Frank Rowand's dt_stat script.
#
# This script tests for devices that were declared on the Devicetree and are
# expected to bind to a driver, but didn't.
#
# To achieve this, two lists are used:
# * a list of the compatibles that can be matched by a Devicetree node
# * a list of compatibles that should be ignored
#
DIR="$(dirname $(readlink -f "$0"))"
source "${DIR}"/../kselftest/ktap_helpers.sh
PDT=/proc/device-tree/
COMPAT_LIST="${DIR}"/compatible_list
IGNORE_LIST="${DIR}"/compatible_ignore_list
ktap_print_header
if [[ ! -d "${PDT}" ]]; then
ktap_skip_all "${PDT} doesn't exist."
exit "${KSFT_SKIP}"
fi
nodes_compatible=$(
for node in $(find ${PDT} -type d); do
[ ! -f "${node}"/compatible ] && continue
# Check if node is available
if [[ -e "${node}"/status ]]; then
status=$(tr -d '\000' < "${node}"/status)
[[ "${status}" != "okay" && "${status}" != "ok" ]] && continue
fi
echo "${node}" | sed -e 's|\/proc\/device-tree||'
done | sort
)
nodes_dev_bound=$(
IFS=$'\n'
for dev_dir in $(find /sys/devices -type d); do
[ ! -f "${dev_dir}"/uevent ] && continue
[ ! -d "${dev_dir}"/driver ] && continue
grep '^OF_FULLNAME=' "${dev_dir}"/uevent | sed -e 's|OF_FULLNAME=||'
done
)
num_tests=$(echo ${nodes_compatible} | wc -w)
ktap_set_plan "${num_tests}"
retval="${KSFT_PASS}"
for node in ${nodes_compatible}; do
if ! echo "${nodes_dev_bound}" | grep -E -q "(^| )${node}( |\$)"; then
compatibles=$(tr '\000' '\n' < "${PDT}"/"${node}"/compatible)
for compatible in ${compatibles}; do
if grep -x -q "${compatible}" "${IGNORE_LIST}"; then
continue
fi
if grep -x -q "${compatible}" "${COMPAT_LIST}"; then
ktap_test_fail "${node}"
retval="${KSFT_FAIL}"
continue 2
fi
done
ktap_test_skip "${node}"
else
ktap_test_pass "${node}"
fi
done
ktap_print_totals
exit "${retval}"
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