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Introduce a new kselftest to detect devices that were declared in the Devicetree, and are expected to be probed by a driver, but weren't. The test uses two lists: a list of compatibles that can match a Devicetree device to a driver, and a list of compatibles that should be ignored. The first is automatically generated by the dt-extract-compatibles script, and is run as part of building this test. The list of compatibles to ignore is a hand-crafted list to capture the few exceptions of compatibles that are expected to match a driver but not be bound to it. Signed-off-by: Nícolas F. R. A. Prado <nfraprado@collabora.com> Reviewed-by: Shuah Khan <skhan@linuxfoundation.org> Link: https://lore.kernel.org/r/20230828211424.2964562-4-nfraprado@collabora.com Signed-off-by: Rob Herring <robh@kernel.org>
84 lines
1.9 KiB
Bash
Executable File
84 lines
1.9 KiB
Bash
Executable File
#!/bin/bash
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# SPDX-License-Identifier: GPL-2.0
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#
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# Copyright (c) 2023 Collabora Ltd
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#
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# Based on Frank Rowand's dt_stat script.
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#
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# This script tests for devices that were declared on the Devicetree and are
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# expected to bind to a driver, but didn't.
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#
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# To achieve this, two lists are used:
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# * a list of the compatibles that can be matched by a Devicetree node
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# * a list of compatibles that should be ignored
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#
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DIR="$(dirname $(readlink -f "$0"))"
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source "${DIR}"/ktap_helpers.sh
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PDT=/proc/device-tree/
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COMPAT_LIST="${DIR}"/compatible_list
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IGNORE_LIST="${DIR}"/compatible_ignore_list
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KSFT_PASS=0
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KSFT_FAIL=1
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KSFT_SKIP=4
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ktap_print_header
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if [[ ! -d "${PDT}" ]]; then
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ktap_skip_all "${PDT} doesn't exist."
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exit "${KSFT_SKIP}"
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fi
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nodes_compatible=$(
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for node_compat in $(find ${PDT} -name compatible); do
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node=$(dirname "${node_compat}")
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# Check if node is available
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if [[ -e "${node}"/status ]]; then
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status=$(tr -d '\000' < "${node}"/status)
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[[ "${status}" != "okay" && "${status}" != "ok" ]] && continue
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fi
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echo "${node}" | sed -e 's|\/proc\/device-tree||'
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done | sort
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)
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nodes_dev_bound=$(
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IFS=$'\n'
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for uevent in $(find /sys/devices -name uevent); do
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if [[ -d "$(dirname "${uevent}")"/driver ]]; then
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grep '^OF_FULLNAME=' "${uevent}" | sed -e 's|OF_FULLNAME=||'
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fi
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done
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)
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num_tests=$(echo ${nodes_compatible} | wc -w)
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ktap_set_plan "${num_tests}"
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retval="${KSFT_PASS}"
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for node in ${nodes_compatible}; do
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if ! echo "${nodes_dev_bound}" | grep -E -q "(^| )${node}( |\$)"; then
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compatibles=$(tr '\000' '\n' < "${PDT}"/"${node}"/compatible)
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for compatible in ${compatibles}; do
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if grep -x -q "${compatible}" "${IGNORE_LIST}"; then
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continue
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fi
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if grep -x -q "${compatible}" "${COMPAT_LIST}"; then
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ktap_test_fail "${node}"
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retval="${KSFT_FAIL}"
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continue 2
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fi
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done
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ktap_test_skip "${node}"
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else
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ktap_test_pass "${node}"
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fi
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done
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ktap_print_totals
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exit "${retval}"
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