tools/testing/selftests/dt/test_unprobed_devices.sh

   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}"/ktap_helpers.sh
  19
  20 PDT=/proc/device-tree/
  21 COMPAT_LIST="${DIR}"/compatible_list
  22 IGNORE_LIST="${DIR}"/compatible_ignore_list
  23
  24 KSFT_PASS=0
  25 KSFT_FAIL=1
  26 KSFT_SKIP=4
  27
  28 ktap_print_header
  29
  30 if [[ ! -d "${PDT}" ]]; then
  31         ktap_skip_all "${PDT} doesn't exist."
  32         exit "${KSFT_SKIP}"
  33 fi
  34
  35 nodes_compatible=$(
  36         for node_compat in $(find ${PDT} -name compatible); do
  37                 node=$(dirname "${node_compat}")
  38                 # Check if node is available
  39                 if [[ -e "${node}"/status ]]; then
  40                         status=$(tr -d '\000' < "${node}"/status)
  41                         [[ "${status}" != "okay" && "${status}" != "ok" ]] && continue
  42                 fi
  43                 echo "${node}" | sed -e 's|\/proc\/device-tree||'
  44         done | sort
  45         )
  46
  47 nodes_dev_bound=$(
  48         IFS=$'\n'
  49         for uevent in $(find /sys/devices -name uevent); do
  50                 if [[ -d "$(dirname "${uevent}")"/driver ]]; then
  51                         grep '^OF_FULLNAME=' "${uevent}" | sed -e 's|OF_FULLNAME=||'
  52                 fi
  53         done
  54         )
  55
  56 num_tests=$(echo ${nodes_compatible} | wc -w)
  57 ktap_set_plan "${num_tests}"
  58
  59 retval="${KSFT_PASS}"
  60 for node in ${nodes_compatible}; do
  61         if ! echo "${nodes_dev_bound}" | grep -E -q "(^| )${node}( |\$)"; then
  62                 compatibles=$(tr '\000' '\n' < "${PDT}"/"${node}"/compatible)
  63
  64                 for compatible in ${compatibles}; do
  65                         if grep -x -q "${compatible}" "${IGNORE_LIST}"; then
  66                                 continue
  67                         fi
  68
  69                         if grep -x -q "${compatible}" "${COMPAT_LIST}"; then
  70                                 ktap_test_fail "${node}"
  71                                 retval="${KSFT_FAIL}"
  72                                 continue 2
  73                         fi
  74                 done
  75                 ktap_test_skip "${node}"
  76         else
  77                 ktap_test_pass "${node}"
  78         fi
  79
  80 done
  81
  82 ktap_print_totals
  83 exit "${retval}"