name : gpio-aggregator.sh #!/bin/sh # SPDX-License-Identifier: GPL-2.0 # Copyright (C) 2025 Bartosz Golaszewski<brgl@bgdev.pl> # Copyright (C) 2025 Koichiro Den<koichiro.den@canonical.com> BASE_DIR=$(dirname "$0") CONFIGFS_SIM_DIR="/sys/kernel/config/gpio-sim" CONFIGFS_AGG_DIR="/sys/kernel/config/gpio-aggregator" SYSFS_AGG_DIR="/sys/bus/platform/drivers/gpio-aggregator" MODULE="gpio-aggregator" fail() { echo "$*" >&2 echo "GPIO $MODULE test FAIL" exit 1 } skip() { echo "$*" >&2 echo "GPIO $MODULE test SKIP" exit 4 } # gpio-sim sim_enable_chip() { local CHIP=$1 echo 1 > "$CONFIGFS_SIM_DIR/$CHIP/live" || fail "Unable to enable the chip" } sim_disable_chip() { local CHIP=$1 echo 0 > "$CONFIGFS_SIM_DIR/$CHIP/live" || fail "Unable to disable the chip" } sim_configfs_cleanup() { local NOCHECK=${1:-0} for CHIP_DIR in "$CONFIGFS_SIM_DIR"/*; do [ -d "$CHIP_DIR" ] || continue echo 0 > "$CHIP_DIR/live" find "$CHIP_DIR" -depth -type d -exec rmdir {} \; done [ "$NOCHECK" -eq 1 ] && return; remaining=$(find "$CONFIGFS_SIM_DIR" -mindepth 1 -type d 2> /dev/null) if [ -n "$remaining" ]; then fail "Directories remain in $CONFIGFS_SIM_DIR: $remaining" fi } sim_get_chip_label() { local CHIP=$1 local BANK=$2 local CHIP_NAME=$(cat "$CONFIGFS_SIM_DIR/$CHIP/$BANK/chip_name" 2> /dev/null) || \ fail "Unable to read the chip name from configfs" $BASE_DIR/gpio-chip-info "/dev/$CHIP_NAME" label || \ fail "Unable to read the chip label from the character device" } # gpio-aggregator agg_create_chip() { local CHIP=$1 mkdir "$CONFIGFS_AGG_DIR/$CHIP" } agg_remove_chip() { local CHIP=$1 find "$CONFIGFS_AGG_DIR/$CHIP/" -depth -type d -exec rmdir {} \; || \ fail "Unable to remove $CONFIGFS_AGG_DIR/$CHIP" } agg_create_line() { local CHIP=$1 local LINE=$2 mkdir "$CONFIGFS_AGG_DIR/$CHIP/$LINE" } agg_remove_line() { local CHIP=$1 local LINE=$2 rmdir "$CONFIGFS_AGG_DIR/$CHIP/$LINE" } agg_set_key() { local CHIP=$1 local LINE=$2 local KEY=$3 echo "$KEY" > "$CONFIGFS_AGG_DIR/$CHIP/$LINE/key" || fail "Unable to set the lookup key" } agg_set_offset() { local CHIP=$1 local LINE=$2 local OFFSET=$3 echo "$OFFSET" > "$CONFIGFS_AGG_DIR/$CHIP/$LINE/offset" || \ fail "Unable to set the lookup offset" } agg_set_line_name() { local CHIP=$1 local LINE=$2 local NAME=$3 echo "$NAME" > "$CONFIGFS_AGG_DIR/$CHIP/$LINE/name" || fail "Unable to set the line name" } agg_enable_chip() { local CHIP=$1 echo 1 > "$CONFIGFS_AGG_DIR/$CHIP/live" || fail "Unable to enable the chip" } agg_disable_chip() { local CHIP=$1 echo 0 > "$CONFIGFS_AGG_DIR/$CHIP/live" || fail "Unable to disable the chip" } agg_configfs_cleanup() { local NOCHECK=${1:-0} for CHIP_DIR in "$CONFIGFS_AGG_DIR"/*; do [ -d "$CHIP_DIR" ] || continue echo 0 > "$CHIP_DIR/live" 2> /dev/null find "$CHIP_DIR" -depth -type d -exec rmdir {} \; done [ "$NOCHECK" -eq 1 ] && return; remaining=$(find "$CONFIGFS_AGG_DIR" -mindepth 1 -type d 2> /dev/null) if [ -n "$remaining" ]; then fail "Directories remain in $CONFIGFS_AGG_DIR: $remaining" fi } agg_configfs_dev_name() { local CHIP=$1 cat "$CONFIGFS_AGG_DIR/$CHIP/dev_name" 2> /dev/null || \ fail "Unable to read the device name from configfs" } agg_configfs_chip_name() { local CHIP=$1 local DEV_NAME=$(agg_configfs_dev_name "$CHIP") local CHIP_LIST=$(find "/sys/devices/platform/$DEV_NAME" \ -maxdepth 1 -type d -name "gpiochip[0-9]*" 2> /dev/null) local CHIP_COUNT=$(echo "$CHIP_LIST" | wc -l) if [ -z "$CHIP_LIST" ]; then fail "No gpiochip in/sys/devices/platform/$DEV_NAME/" elif [ "$CHIP_COUNT" -ne 1 ]; then fail "Multiple gpiochips unexpectedly found: $CHIP_LIST" fi basename "$CHIP_LIST" } agg_get_chip_num_lines() { local CHIP=$1 local N_DIR=$(ls -d $CONFIGFS_AGG_DIR/$CHIP/line[0-9]* 2> /dev/null | wc -l) local N_LINES if [ "$(cat $CONFIGFS_AGG_DIR/$CHIP/live)" = 0 ]; then echo "$N_DIR" else N_LINES=$( $BASE_DIR/gpio-chip-info \ "/dev/$(agg_configfs_chip_name "$CHIP")" num-lines ) || fail "Unable to read the number of lines from the character device" if [ $N_DIR != $N_LINES ]; then fail "Discrepancy between two sources for the number of lines" fi echo "$N_LINES" fi } agg_get_chip_label() { local CHIP=$1 $BASE_DIR/gpio-chip-info "/dev/$(agg_configfs_chip_name "$CHIP")" label || \ fail "Unable to read the chip label from the character device" } agg_get_line_name() { local CHIP=$1 local OFFSET=$2 local NAME_CONFIGFS=$(cat "$CONFIGFS_AGG_DIR/$CHIP/line${OFFSET}/name") local NAME_CDEV if [ "$(cat "$CONFIGFS_AGG_DIR/$CHIP/live")" = 0 ]; then echo "$NAME_CONFIGFS" else NAME_CDEV=$( $BASE_DIR/gpio-line-name \ "/dev/$(agg_configfs_chip_name "$CHIP")" "$OFFSET" ) || fail "Unable to read the line name from the character device" if [ "$NAME_CONFIGFS" != "$NAME_CDEV" ]; then fail "Discrepancy between two sources for the name of line" fi echo "$NAME_CDEV" fi } # Load the modules. This will pull in configfs if needed too. modprobe gpio-sim || skip "unable to load the gpio-sim module" modprobe gpio-aggregator || skip "unable to load the gpio-aggregator module" # Make sure configfs is mounted at /sys/kernel/config. Wait a bit if needed. for IDX in $(seq 5); do if [ "$IDX" -eq "5" ]; then skip "configfs not mounted at /sys/kernel/config" fi mountpoint -q /sys/kernel/config && break sleep 0.1 done # If the module was already loaded: remove all previous chips agg_configfs_cleanup sim_configfs_cleanup trap "exit 1" SIGTERM SIGINT trap "agg_configfs_cleanup 1; sim_configfs_cleanup 1" EXIT # Use gpio-sim chips as the test backend for CHIP in $(seq -f "chip%g" 0 1); do mkdir $CONFIGFS_SIM_DIR/$CHIP for BANK in $(seq -f "bank%g" 0 1); do mkdir -p "$CONFIGFS_SIM_DIR/$CHIP/$BANK" echo "${CHIP}_${BANK}" > "$CONFIGFS_SIM_DIR/$CHIP/$BANK/label" || \ fail "unable to set the chip label" echo 16 > "$CONFIGFS_SIM_DIR/$CHIP/$BANK/num_lines" || \ fail "unable to set the number of lines" for IDX in $(seq 0 15); do LINE_NAME="${CHIP}${BANK}_${IDX}" LINE_DIR="$CONFIGFS_SIM_DIR/$CHIP/$BANK/line$IDX" mkdir -p $LINE_DIR echo "$LINE_NAME" > "$LINE_DIR/name" || fail "unable to set the line name" done done sim_enable_chip "$CHIP" done echo "1. GPIO aggregator creation/deletion" echo "1.1. Creation/deletion via configfs" echo "1.1.1. Minimum creation/deletion" agg_create_chip agg0 agg_create_line agg0 line0 agg_set_key agg0 line0 "$(sim_get_chip_label chip0 bank0)" agg_set_offset agg0 line0 5 agg_set_line_name agg0 line0 test0 agg_enable_chip agg0 test "$(cat "$CONFIGFS_AGG_DIR/agg0/live")" = 1 || fail "chip unexpectedly dead" test "$(agg_get_chip_label agg0)" = "$(agg_configfs_dev_name agg0)" || \ fail "label is inconsistent" test "$(agg_get_chip_num_lines agg0)" = "1" || fail "number of lines is not 1" test "$(agg_get_line_name agg0 0)" = "test0" || fail "line name is unset" agg_disable_chip agg0 agg_remove_line agg0 line0 agg_remove_chip agg0 echo "1.1.2. Complex creation/deletion" agg_create_chip agg0 agg_create_line agg0 line0 agg_create_line agg0 line1 agg_create_line agg0 line2 agg_create_line agg0 line3 agg_set_key agg0 line0 "$(sim_get_chip_label chip0 bank0)" agg_set_key agg0 line1 "$(sim_get_chip_label chip0 bank1)" agg_set_key agg0 line2 "$(sim_get_chip_label chip1 bank0)" agg_set_key agg0 line3 "$(sim_get_chip_label chip1 bank1)" agg_set_offset agg0 line0 1 agg_set_offset agg0 line1 3 agg_set_offset agg0 line2 5 agg_set_offset agg0 line3 7 agg_set_line_name agg0 line0 test0 agg_set_line_name agg0 line1 test1 agg_set_line_name agg0 line2 test2 agg_set_line_name agg0 line3 test3 agg_enable_chip agg0 test "$(cat "$CONFIGFS_AGG_DIR/agg0/live")" = 1 || fail "chip unexpectedly dead" test "$(agg_get_chip_label agg0)" = "$(agg_configfs_dev_name agg0)" || \ fail "label is inconsistent" test "$(agg_get_chip_num_lines agg0)" = "4" || fail "number of lines is not 1" test "$(agg_get_line_name agg0 0)" = "test0" || fail "line name is unset" test "$(agg_get_line_name agg0 1)" = "test1" || fail "line name is unset" test "$(agg_get_line_name agg0 2)" = "test2" || fail "line name is unset" test "$(agg_get_line_name agg0 3)" = "test3" || fail "line name is unset" agg_disable_chip agg0 agg_remove_line agg0 line0 agg_remove_line agg0 line1 agg_remove_line agg0 line2 agg_remove_line agg0 line3 agg_remove_chip agg0 echo "1.1.3. Can't instantiate a chip without any line" agg_create_chip agg0 echo 1 > "$CONFIGFS_AGG_DIR/agg0/live" 2> /dev/null && fail "chip unexpectedly enabled" test "$(cat "$CONFIGFS_AGG_DIR/agg0/live")" = 0 || fail "chip unexpectedly alive" agg_remove_chip agg0 echo "1.1.4. Can't instantiate a chip with invalid configuration" agg_create_chip agg0 agg_create_line agg0 line0 agg_set_key agg0 line0 "chipX_bankX" agg_set_offset agg0 line0 99 agg_set_line_name agg0 line0 test0 echo 1 > "$CONFIGFS_AGG_DIR/agg0/live" 2> /dev/null && fail "chip unexpectedly enabled" test "$(cat "$CONFIGFS_AGG_DIR/agg0/live")" = 0 || fail "chip unexpectedly alive" agg_remove_line agg0 line0 agg_remove_chip agg0 echo "1.1.5. Can't instantiate a chip asynchronously via deferred probe" agg_create_chip agg0 agg_create_line agg0 line0 agg_set_key agg0 line0 "chip0_bank0" agg_set_offset agg0 line0 5 agg_set_line_name agg0 line0 test0 sim_disable_chip chip0 echo 1 > "$CONFIGFS_AGG_DIR/agg0/live" 2> /dev/null && fail "chip unexpectedly enabled" test "$(cat "$CONFIGFS_AGG_DIR/agg0/live")" = 0 || fail "chip unexpectedly alive" sim_enable_chip chip0 sleep 1 test "$(cat "$CONFIGFS_AGG_DIR/agg0/live")" = 0 || \ fail "chip unexpectedly transitioned to 'live' state" agg_remove_line agg0 line0 agg_remove_chip agg0 echo "1.1.6. Can't instantiate a chip with _sysfs prefix" mkdir "$CONFIGFS_AGG_DIR/_sysfs" 2> /dev/null && fail "chip _sysfs unexpectedly created" mkdir "$CONFIGFS_AGG_DIR/_sysfs.foo" 2> /dev/null && fail "chip _sysfs.foo unexpectedly created" echo "1.2. Creation/deletion via sysfs" echo "1.2.1. Minimum creation/deletion" echo "chip0_bank0 0" > "$SYSFS_AGG_DIR/new_device" CHIPNAME=$(agg_configfs_chip_name _sysfs.0) test "$(cat "$CONFIGFS_AGG_DIR/_sysfs.0/live")" = 1 || fail "chip unexpectedly dead" test "$(agg_get_chip_label _sysfs.0)" = "$(agg_configfs_dev_name _sysfs.0)" || \ fail "label is inconsistent" test "$(agg_get_chip_num_lines _sysfs.0)" = "1" || fail "number of lines is not 1" test "$(agg_get_line_name _sysfs.0 0)" = "" || fail "line name is unset" echo "$(agg_configfs_dev_name _sysfs.0)" > "$SYSFS_AGG_DIR/delete_device" test -d $CONFIGFS_AGG_DIR/_sysfs.0 && fail "_sysfs.0 unexpectedly remains" test -d/dev/${CHIPNAME} && fail "/dev/${CHIPNAME} unexpectedly remains" echo "1.2.2. Complex creation/deletion" echo "chip0bank0_0 chip1_bank1 10-11" > "$SYSFS_AGG_DIR/new_device" CHIPNAME=$(agg_configfs_chip_name _sysfs.0) test "$(cat "$CONFIGFS_AGG_DIR/_sysfs.0/live")" = 1 || fail "chip unexpectedly dead" test "$(agg_get_chip_label _sysfs.0)" = "$(agg_configfs_dev_name _sysfs.0)" || \ fail "label is inconsistent" test "$(agg_get_chip_num_lines _sysfs.0)" = "3" || fail "number of lines is not 3" test "$(agg_get_line_name _sysfs.0 0)" = "" || fail "line name is unset" test "$(agg_get_line_name _sysfs.0 1)" = "" || fail "line name is unset" test "$(agg_get_line_name _sysfs.0 2)" = "" || fail "line name is unset" echo "$(agg_configfs_dev_name _sysfs.0)" > "$SYSFS_AGG_DIR/delete_device" test -d $CONFIGFS_AGG_DIR/_sysfs.0 && fail "_sysfs.0 unexpectedly remains" test -d/dev/${CHIPNAME} && fail "/dev/${CHIPNAME} unexpectedly remains" echo "1.2.3. Asynchronous creation with deferred probe" sim_disable_chip chip0 echo 'chip0_bank0 0' > $SYSFS_AGG_DIR/new_device sleep 1 test "$(cat "$CONFIGFS_AGG_DIR/_sysfs.0/live")" = 0 || fail "chip unexpectedly alive" sim_enable_chip chip0 sleep 1 CHIPNAME=$(agg_configfs_chip_name _sysfs.0) test "$(cat "$CONFIGFS_AGG_DIR/_sysfs.0/live")" = 1 || fail "chip unexpectedly remains dead" test "$(agg_get_chip_label _sysfs.0)" = "$(agg_configfs_dev_name _sysfs.0)" || \ fail "label is inconsistent" test "$(agg_get_chip_num_lines _sysfs.0)" = "1" || fail "number of lines is not 1" test "$(agg_get_line_name _sysfs.0 0)" = "" || fail "line name unexpectedly set" echo "$(agg_configfs_dev_name _sysfs.0)" > "$SYSFS_AGG_DIR/delete_device" test -d $CONFIGFS_AGG_DIR/_sysfs.0 && fail "_sysfs.0 unexpectedly remains" test -d/dev/${CHIPNAME} && fail "/dev/${CHIPNAME} unexpectedly remains" echo "1.2.4. Can't instantiate a chip with invalid configuration" echo "xyz 0" > "$SYSFS_AGG_DIR/new_device" test "$(cat $CONFIGFS_AGG_DIR/_sysfs.0/live)" = 0 || fail "chip unexpectedly alive" echo "$(agg_configfs_dev_name _sysfs.0)" > "$SYSFS_AGG_DIR/delete_device" echo "2. GPIO aggregator configuration" echo "2.1. Configuring aggregators instantiated via configfs" setup_2_1() { agg_create_chip agg0 agg_create_line agg0 line0 agg_create_line agg0 line1 agg_set_key agg0 line0 "$(sim_get_chip_label chip0 bank0)" agg_set_key agg0 line1 "$(sim_get_chip_label chip1 bank0)" agg_set_offset agg0 line0 1 agg_set_offset agg0 line1 3 agg_set_line_name agg0 line0 test0 agg_set_line_name agg0 line1 test1 agg_enable_chip agg0 } teardown_2_1() { agg_configfs_cleanup } echo "2.1.1. While offline" echo "2.1.1.1. Line can be added/removed" setup_2_1 agg_disable_chip agg0 agg_create_line agg0 line2 agg_set_key agg0 line2 "$(sim_get_chip_label chip0 bank1)" agg_set_offset agg0 line2 5 agg_enable_chip agg0 test "$(agg_get_chip_num_lines agg0)" = "3" || fail "number of lines is not 1" teardown_2_1 echo "2.1.1.2. Line key can be modified" setup_2_1 agg_disable_chip agg0 agg_set_key agg0 line0 "$(sim_get_chip_label chip0 bank1)" agg_set_key agg0 line1 "$(sim_get_chip_label chip1 bank1)" agg_enable_chip agg0 teardown_2_1 echo "2.1.1.3. Line name can be modified" setup_2_1 agg_disable_chip agg0 agg_set_line_name agg0 line0 new0 agg_set_line_name agg0 line1 new1 agg_enable_chip agg0 test "$(agg_get_line_name agg0 0)" = "new0" || fail "line name is unset" test "$(agg_get_line_name agg0 1)" = "new1" || fail "line name is unset" teardown_2_1 echo "2.1.1.4. Line offset can be modified" setup_2_1 agg_disable_chip agg0 agg_set_offset agg0 line0 5 agg_set_offset agg0 line1 7 agg_enable_chip agg0 teardown_2_1 echo "2.1.1.5. Can re-enable a chip after valid reconfiguration" setup_2_1 agg_disable_chip agg0 agg_set_key agg0 line0 "$(sim_get_chip_label chip1 bank1)" agg_set_offset agg0 line0 15 agg_set_key agg0 line1 "$(sim_get_chip_label chip0 bank1)" agg_set_offset agg0 line0 14 agg_create_line agg0 line2 agg_set_key agg0 line2 "$(sim_get_chip_label chip0 bank1)" agg_set_offset agg0 line2 13 agg_enable_chip agg0 test "$(agg_get_chip_num_lines agg0)" = "3" || fail "number of lines is not 1" teardown_2_1 echo "2.1.1.7. Can't re-enable a chip with invalid reconfiguration" setup_2_1 agg_disable_chip agg0 agg_set_key agg0 line0 invalidkey echo 1 > "$CONFIGFS_AGG_DIR/agg0/live" 2> /dev/null && fail "chip unexpectedly enabled" teardown_2_1 setup_2_1 agg_disable_chip agg0 agg_set_offset agg0 line0 99 echo 1 > "$CONFIGFS_AGG_DIR/agg0/live" 2> /dev/null && fail "chip unexpectedly enabled" teardown_2_1 echo "2.1.2. While online" echo "2.1.2.1. Can't add/remove line" setup_2_1 mkdir "$CONFIGFS_AGG_DIR/agg0/line2" 2> /dev/null && fail "line unexpectedly added" rmdir "$CONFIGFS_AGG_DIR/agg0/line1" 2> /dev/null && fail "line unexpectedly removed" teardown_2_1 echo "2.1.2.2. Can't modify line key" setup_2_1 echo "chip1_bank1" > "$CONFIGFS_AGG_DIR/agg0/line0/key" 2> /dev/null && \ fail "lookup key unexpectedly updated" teardown_2_1 echo "2.1.2.3. Can't modify line name" setup_2_1 echo "new0" > "$CONFIGFS_AGG_DIR/agg0/line0/name" 2> /dev/null && \ fail "name unexpectedly updated" teardown_2_1 echo "2.1.2.4. Can't modify line offset" setup_2_1 echo "5" > "$CONFIGFS_AGG_DIR/agg0/line0/offset" 2> /dev/null && \ fail "offset unexpectedly updated" teardown_2_1 echo "2.2. Configuring aggregators instantiated via sysfs" setup_2_2() { echo "chip0_bank0 1 chip1_bank0 3" > "$SYSFS_AGG_DIR/new_device" } teardown_2_2() { echo "$(agg_configfs_dev_name _sysfs.0)" > "$SYSFS_AGG_DIR/delete_device" } echo "2.2.1. While online" echo "2.2.1.1. Can toggle live" setup_2_2 agg_disable_chip _sysfs.0 agg_enable_chip _sysfs.0 teardown_2_2 echo "2.2.1.2. Can't add/remove line" setup_2_2 mkdir "$CONFIGFS_AGG_DIR/_sysfs.0/line2" 2> /dev/null && fail "line unexpectedly added" rmdir "$CONFIGFS_AGG_DIR/_sysfs.0/line1" 2> /dev/null && fail "line unexpectedly removed" teardown_2_2 echo "2.2.1.3. Can't modify line key" setup_2_2 echo "chip1_bank1" > "$CONFIGFS_AGG_DIR/_sysfs.0/line0/key" 2> /dev/null && \ fail "lookup key unexpectedly updated" teardown_2_2 echo "2.2.1.4. Can't modify line name" setup_2_2 echo "new0" > "$CONFIGFS_AGG_DIR/_sysfs.0/line0/name" 2> /dev/null && \ fail "name unexpectedly updated" teardown_2_2 echo "2.2.1.5. Can't modify line offset" setup_2_2 echo "5" > "$CONFIGFS_AGG_DIR/_sysfs.0/line0/offset" 2> /dev/null && \ fail "offset unexpectedly updated" teardown_2_2 echo "2.2.2. While waiting for deferred probe" echo "2.2.2.1. Can't add/remove line despite live = 0" sim_disable_chip chip0 setup_2_2 mkdir "$CONFIGFS_AGG_DIR/_sysfs.0/line2" 2> /dev/null && fail "line unexpectedly added" rmdir "$CONFIGFS_AGG_DIR/_sysfs.0/line1" 2> /dev/null && fail "line unexpectedly removed" teardown_2_2 sim_enable_chip chip0 echo "2.2.2.2. Can't modify line key" sim_disable_chip chip0 setup_2_2 echo "chip1_bank1" > "$CONFIGFS_AGG_DIR/_sysfs.0/line0/key" 2> /dev/null && \ fail "lookup key unexpectedly updated" teardown_2_2 sim_enable_chip chip0 echo "2.2.2.3. Can't modify line name" sim_disable_chip chip0 setup_2_2 echo "new0" > "$CONFIGFS_AGG_DIR/_sysfs.0/line0/name" 2> /dev/null && \ fail "name unexpectedly updated" teardown_2_2 sim_enable_chip chip0 echo "2.2.2.4. Can't modify line offset" sim_disable_chip chip0 setup_2_2 echo 5 > "$CONFIGFS_AGG_DIR/_sysfs.0/line0/offset" 2> /dev/null && \ fail "offset unexpectedly updated" teardown_2_2 sim_enable_chip chip0 echo "2.2.2.5. Can't toggle live" sim_disable_chip chip0 setup_2_2 test "$(cat "$CONFIGFS_AGG_DIR/_sysfs.0/live")" = 0 || fail "chip unexpectedly alive" echo 1 > "$CONFIGFS_AGG_DIR/_sysfs.0/live" 2> /dev/null && fail "chip unexpectedly enabled" teardown_2_2 sim_enable_chip chip0 echo "2.2.3. While offline" echo "2.2.3.1. Can't add/remove line despite live = 0" setup_2_2 agg_disable_chip _sysfs.0 mkdir "$CONFIGFS_AGG_DIR/_sysfs.0/line2" 2> /dev/null && fail "line unexpectedly added" rmdir "$CONFIGFS_AGG_DIR/_sysfs.0/line1" 2> /dev/null && fail "line unexpectedly removed" teardown_2_2 echo "2.2.3.2. Line key can be modified" setup_2_2 agg_disable_chip _sysfs.0 agg_set_key _sysfs.0 line0 "$(sim_get_chip_label chip0 bank1)" agg_set_key _sysfs.0 line1 "$(sim_get_chip_label chip1 bank1)" agg_enable_chip _sysfs.0 teardown_2_2 echo "2.2.3.3. Line name can be modified" setup_2_2 agg_disable_chip _sysfs.0 agg_set_line_name _sysfs.0 line0 new0 agg_set_line_name _sysfs.0 line1 new1 agg_enable_chip _sysfs.0 test "$(agg_get_line_name _sysfs.0 0)" = "new0" || fail "line name is unset" test "$(agg_get_line_name _sysfs.0 1)" = "new1" || fail "line name is unset" teardown_2_2 echo "2.2.3.4. Line offset can be modified" setup_2_2 agg_disable_chip _sysfs.0 agg_set_offset _sysfs.0 line0 5 agg_set_offset _sysfs.0 line1 7 agg_enable_chip _sysfs.0 teardown_2_2 echo "2.2.3.5. Can re-enable a chip with valid reconfiguration" setup_2_2 agg_disable_chip _sysfs.0 agg_set_key _sysfs.0 line0 "$(sim_get_chip_label chip1 bank1)" agg_set_offset _sysfs.0 line0 15 agg_set_key _sysfs.0 line1 "$(sim_get_chip_label chip0 bank1)" agg_set_offset _sysfs.0 line0 14 agg_enable_chip _sysfs.0 teardown_2_2 echo "2.2.3.6. Can't re-enable a chip with invalid reconfiguration" setup_2_2 agg_disable_chip _sysfs.0 agg_set_key _sysfs.0 line0 invalidkey echo 1 > "$CONFIGFS_AGG_DIR/_sysfs.0/live" 2> /dev/null && fail "chip unexpectedly enabled" teardown_2_2 setup_2_2 agg_disable_chip _sysfs.0 agg_set_offset _sysfs.0 line0 99 echo 1 > "$CONFIGFS_AGG_DIR/_sysfs.0/live" 2> /dev/null && fail "chip unexpectedly enabled" teardown_2_2 echo "3. Module unload" echo "3.1. Can't unload module if there is at least one device created via configfs" agg_create_chip agg0 modprobe -r gpio-aggregator 2> /dev/null test -d /sys/module/gpio_aggregator || fail "module unexpectedly unloaded" agg_remove_chip agg0 echo "3.2. Can unload module if there is no device created via configfs" echo "chip0_bank0 1 chip1_bank0 3" > "$SYSFS_AGG_DIR/new_device" modprobe -r gpio-aggregator 2> /dev/null test -d /sys/module/gpio_aggregator && fail "module unexpectedly remains to be loaded" modprobe gpio-aggregator 2> /dev/null echo "4. GPIO forwarder functional" SETTINGS="chip0:bank0:2 chip0:bank1:4 chip1:bank0:6 chip1:bank1:8" setup_4() { local OFFSET=0 agg_create_chip agg0 for SETTING in $SETTINGS; do CHIP=$(echo "$SETTING" | cut -d: -f1) BANK=$(echo "$SETTING" | cut -d: -f2) LINE=$(echo "$SETTING" | cut -d: -f3) agg_create_line agg0 "line${OFFSET}" agg_set_key agg0 "line${OFFSET}" "$(sim_get_chip_label "$CHIP" "$BANK")" agg_set_offset agg0 "line${OFFSET}" "$LINE" OFFSET=$(expr $OFFSET + 1) done agg_enable_chip agg0 } teardown_4() { agg_configfs_cleanup } echo "4.1. Forwarding set values" setup_4 OFFSET=0 for SETTING in $SETTINGS; do CHIP=$(echo "$SETTING" | cut -d: -f1) BANK=$(echo "$SETTING" | cut -d: -f2) LINE=$(echo "$SETTING" | cut -d: -f3) DEVNAME=$(cat "$CONFIGFS_SIM_DIR/$CHIP/dev_name") CHIPNAME=$(cat "$CONFIGFS_SIM_DIR/$CHIP/$BANK/chip_name") VAL_PATH="/sys/devices/platform/$DEVNAME/$CHIPNAME/sim_gpio${LINE}/value" test $(cat $VAL_PATH) = "0" || fail "incorrect value read from sysfs" $BASE_DIR/gpio-mockup-cdev -s 1 "/dev/$(agg_configfs_chip_name agg0)" "$OFFSET" & mock_pid=$! sleep 0.1 # FIXME Any better way? test "$(cat $VAL_PATH)" = "1" || fail "incorrect value read from sysfs" kill "$mock_pid" OFFSET=$(expr $OFFSET + 1) done teardown_4 echo "4.2. Forwarding set config" setup_4 OFFSET=0 for SETTING in $SETTINGS; do CHIP=$(echo "$SETTING" | cut -d: -f1) BANK=$(echo "$SETTING" | cut -d: -f2) LINE=$(echo "$SETTING" | cut -d: -f3) DEVNAME=$(cat "$CONFIGFS_SIM_DIR/$CHIP/dev_name") CHIPNAME=$(cat "$CONFIGFS_SIM_DIR/$CHIP/$BANK/chip_name") VAL_PATH="/sys/devices/platform/$DEVNAME/$CHIPNAME/sim_gpio${LINE}/value" $BASE_DIR/gpio-mockup-cdev -b pull-up "/dev/$(agg_configfs_chip_name agg0)" "$OFFSET" test $(cat "$VAL_PATH") = "1" || fail "incorrect value read from sysfs" OFFSET=$(expr $OFFSET + 1) done teardown_4 echo "5. Race condition verification" echo "5.1. Stress test of new_device/delete_device and module load/unload" for _ in $(seq 1000); do { echo "dummy 0" > "$SYSFS_AGG_DIR/new_device" cat "$CONFIGFS_AGG_DIR/_sysfs.0/dev_name" > "$SYSFS_AGG_DIR/delete_device" } 2> /dev/null done & writer_pid=$! while kill -0 "$writer_pid" 2> /dev/null; do { modprobe gpio-aggregator modprobe -r gpio-aggregator } 2> /dev/null done echo "GPIO $MODULE test PASS"