1 #!/bin/bash
2 # SPDX-License-Identifier: GPL-2.0
3 #
4 # Copyright (c) 2023 Collabora Ltd
5 #
6 # Based on Frank Rowand's dt_stat script.
7 #
8 # This script tests for devices that were declared on the Devicetree and are
9 # expected to bind to a driver, but didn't.
10 #
11 # To achieve this, two lists are used:
12 # * a list of the compatibles that can be matched by a Devicetree node
13 # * a list of compatibles that should be ignored
14 #
15
16 DIR="$(dirname $(readlink -f "$0"))"
17
18 source "${DIR}"/../kselftest/ktap_helpers.sh
19
20 PDT=/proc/device-tree/
21 COMPAT_LIST="${DIR}"/compatible_list
22 IGNORE_LIST="${DIR}"/compatible_ignore_list
23
24 ktap_print_header
25
26 if [[ ! -d "${PDT}" ]]; then
27 ktap_skip_all "${PDT} doesn't exist."
28 exit "${KSFT_SKIP}"
29 fi
30
31 nodes_compatible=$(
32 for node in $(find ${PDT} -type d); do
33 [ ! -f "${node}"/compatible ] && continue
34 # Check if node is available
35 if [[ -e "${node}"/status ]]; then
36 status=$(tr -d '\000' < "${node}"/status)
37 if [[ "${status}" != "okay" && "${status}" != "ok" ]]; then
38 if [ -n "${disabled_nodes_regex}" ]; then
39 disabled_nodes_regex="${disabled_nodes_regex}|${node}"
40 else
41 disabled_nodes_regex="${node}"
42 fi
43 continue
44 fi
45 fi
46
47 # Ignore this node if one of its ancestors was disabled
48 if [ -n "${disabled_nodes_regex}" ]; then
49 echo "${node}" | grep -q -E "${disabled_nodes_regex}" && continue
50 fi
51
52 echo "${node}" | sed -e 's|\/proc\/device-tree||'
53 done | sort
54 )
55
56 nodes_dev_bound=$(
57 IFS=$'\n'
58 for dev_dir in $(find /sys/devices -type d); do
59 [ ! -f "${dev_dir}"/uevent ] && continue
60 [ ! -d "${dev_dir}"/driver ] && continue
61
62 grep '^OF_FULLNAME=' "${dev_dir}"/uevent | sed -e 's|OF_FULLNAME=||'
63 done
64 )
65
66 num_tests=$(echo ${nodes_compatible} | wc -w)
67 ktap_set_plan "${num_tests}"
68
69 retval="${KSFT_PASS}"
70 for node in ${nodes_compatible}; do
71 if ! echo "${nodes_dev_bound}" | grep -E -q "(^| )${node}( |\$)"; then
72 compatibles=$(tr '\000' '\n' < "${PDT}"/"${node}"/compatible)
73
74 for compatible in ${compatibles}; do
75 if grep -x -q "${compatible}" "${IGNORE_LIST}"; then
76 continue
77 fi
78
79 if grep -x -q "${compatible}" "${COMPAT_LIST}"; then
80 ktap_test_fail "${node}"
81 retval="${KSFT_FAIL}"
82 continue 2
83 fi
84 done
85 ktap_test_skip "${node}"
86 else
87 ktap_test_pass "${node}"
88 fi
89
90 done
91
92 ktap_print_totals
93 exit "${retval}"
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