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git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
selftests: gpio: add test cases for gpio-aggregator
Add a set of tests for gpio-aggregator module. This test covers both
pre-existing new_device/delete_device interface and new configfs-based
interface.
Signed-off-by: Koichiro Den <koichiro.den@canonical.com>
Link: https://lore.kernel.org/r/20250407043019.4105613-10-koichiro.den@canonical.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
authored by
Koichiro Den
and committed by
Bartosz Golaszewski
6d7f0c11
10f94d09
+725
-1
+1
-1
tools/testing/selftests/gpio/Makefile
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-1
tools/testing/selftests/gpio/Makefile
···
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# SPDX-License-Identifier: GPL-2.0
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TEST_PROGS := gpio-mockup.sh gpio-sim.sh
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TEST_PROGS := gpio-mockup.sh gpio-sim.sh gpio-aggregator.sh
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TEST_FILES := gpio-mockup-sysfs.sh
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TEST_GEN_PROGS_EXTENDED := gpio-mockup-cdev gpio-chip-info gpio-line-name
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CFLAGS += -O2 -g -Wall $(KHDR_INCLUDES)
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tools/testing/selftests/gpio/config
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tools/testing/selftests/gpio/config
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tools/testing/selftests/gpio/gpio-aggregator.sh
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tools/testing/selftests/gpio/gpio-aggregator.sh
···
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#!/bin/sh
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# SPDX-License-Identifier: GPL-2.0
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# Copyright (C) 2025 Bartosz Golaszewski <brgl@bgdev.pl>
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# Copyright (C) 2025 Koichiro Den <koichiro.den@canonical.com>
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BASE_DIR=$(dirname "$0")
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CONFIGFS_SIM_DIR="/sys/kernel/config/gpio-sim"
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CONFIGFS_AGG_DIR="/sys/kernel/config/gpio-aggregator"
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SYSFS_AGG_DIR="/sys/bus/platform/drivers/gpio-aggregator"
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MODULE="gpio-aggregator"
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fail() {
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echo "$*" >&2
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echo "GPIO $MODULE test FAIL"
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exit 1
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}
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skip() {
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echo "$*" >&2
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echo "GPIO $MODULE test SKIP"
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exit 4
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}
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# gpio-sim
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sim_enable_chip() {
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local CHIP=$1
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echo 1 > "$CONFIGFS_SIM_DIR/$CHIP/live" || fail "Unable to enable the chip"
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}
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sim_disable_chip() {
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local CHIP=$1
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echo 0 > "$CONFIGFS_SIM_DIR/$CHIP/live" || fail "Unable to disable the chip"
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}
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sim_configfs_cleanup() {
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local NOCHECK=${1:-0}
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for CHIP_DIR in "$CONFIGFS_SIM_DIR"/*; do
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[ -d "$CHIP_DIR" ] || continue
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echo 0 > "$CHIP_DIR/live"
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find "$CHIP_DIR" -depth -type d -exec rmdir {} \;
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done
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[ "$NOCHECK" -eq 1 ] && return;
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remaining=$(find "$CONFIGFS_SIM_DIR" -mindepth 1 -type d 2> /dev/null)
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if [ -n "$remaining" ]; then
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fail "Directories remain in $CONFIGFS_SIM_DIR: $remaining"
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fi
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}
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sim_get_chip_label() {
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local CHIP=$1
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local BANK=$2
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local CHIP_NAME=$(cat "$CONFIGFS_SIM_DIR/$CHIP/$BANK/chip_name" 2> /dev/null) || \
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fail "Unable to read the chip name from configfs"
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$BASE_DIR/gpio-chip-info "/dev/$CHIP_NAME" label || \
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fail "Unable to read the chip label from the character device"
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}
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# gpio-aggregator
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agg_create_chip() {
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local CHIP=$1
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mkdir "$CONFIGFS_AGG_DIR/$CHIP"
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}
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agg_remove_chip() {
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local CHIP=$1
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find "$CONFIGFS_AGG_DIR/$CHIP/" -depth -type d -exec rmdir {} \; || \
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fail "Unable to remove $CONFIGFS_AGG_DIR/$CHIP"
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}
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agg_create_line() {
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local CHIP=$1
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local LINE=$2
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mkdir "$CONFIGFS_AGG_DIR/$CHIP/$LINE"
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}
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agg_remove_line() {
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local CHIP=$1
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local LINE=$2
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rmdir "$CONFIGFS_AGG_DIR/$CHIP/$LINE"
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}
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agg_set_key() {
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local CHIP=$1
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local LINE=$2
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local KEY=$3
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echo "$KEY" > "$CONFIGFS_AGG_DIR/$CHIP/$LINE/key" || fail "Unable to set the lookup key"
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}
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agg_set_offset() {
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local CHIP=$1
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local LINE=$2
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local OFFSET=$3
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echo "$OFFSET" > "$CONFIGFS_AGG_DIR/$CHIP/$LINE/offset" || \
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fail "Unable to set the lookup offset"
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}
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agg_set_line_name() {
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local CHIP=$1
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local LINE=$2
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local NAME=$3
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echo "$NAME" > "$CONFIGFS_AGG_DIR/$CHIP/$LINE/name" || fail "Unable to set the line name"
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}
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agg_enable_chip() {
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local CHIP=$1
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echo 1 > "$CONFIGFS_AGG_DIR/$CHIP/live" || fail "Unable to enable the chip"
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}
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agg_disable_chip() {
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local CHIP=$1
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echo 0 > "$CONFIGFS_AGG_DIR/$CHIP/live" || fail "Unable to disable the chip"
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}
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agg_configfs_cleanup() {
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local NOCHECK=${1:-0}
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for CHIP_DIR in "$CONFIGFS_AGG_DIR"/*; do
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[ -d "$CHIP_DIR" ] || continue
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echo 0 > "$CHIP_DIR/live" 2> /dev/null
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find "$CHIP_DIR" -depth -type d -exec rmdir {} \;
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done
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[ "$NOCHECK" -eq 1 ] && return;
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remaining=$(find "$CONFIGFS_AGG_DIR" -mindepth 1 -type d 2> /dev/null)
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if [ -n "$remaining" ]; then
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fail "Directories remain in $CONFIGFS_AGG_DIR: $remaining"
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fi
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}
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agg_configfs_dev_name() {
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local CHIP=$1
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cat "$CONFIGFS_AGG_DIR/$CHIP/dev_name" 2> /dev/null || \
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fail "Unable to read the device name from configfs"
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}
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agg_configfs_chip_name() {
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local CHIP=$1
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local DEV_NAME=$(agg_configfs_dev_name "$CHIP")
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local CHIP_LIST=$(find "/sys/devices/platform/$DEV_NAME" \
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-maxdepth 1 -type d -name "gpiochip[0-9]*" 2> /dev/null)
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local CHIP_COUNT=$(echo "$CHIP_LIST" | wc -l)
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if [ -z "$CHIP_LIST" ]; then
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fail "No gpiochip in /sys/devices/platform/$DEV_NAME/"
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elif [ "$CHIP_COUNT" -ne 1 ]; then
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fail "Multiple gpiochips unexpectedly found: $CHIP_LIST"
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fi
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basename "$CHIP_LIST"
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}
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agg_get_chip_num_lines() {
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local CHIP=$1
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local N_DIR=$(ls -d $CONFIGFS_AGG_DIR/$CHIP/line[0-9]* 2> /dev/null | wc -l)
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local N_LINES
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if [ "$(cat $CONFIGFS_AGG_DIR/$CHIP/live)" = 0 ]; then
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echo "$N_DIR"
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else
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N_LINES=$(
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$BASE_DIR/gpio-chip-info \
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"/dev/$(agg_configfs_chip_name "$CHIP")" num-lines
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) || fail "Unable to read the number of lines from the character device"
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if [ $N_DIR != $N_LINES ]; then
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fail "Discrepancy between two sources for the number of lines"
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fi
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echo "$N_LINES"
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fi
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}
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agg_get_chip_label() {
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local CHIP=$1
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$BASE_DIR/gpio-chip-info "/dev/$(agg_configfs_chip_name "$CHIP")" label || \
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fail "Unable to read the chip label from the character device"
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}
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agg_get_line_name() {
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local CHIP=$1
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local OFFSET=$2
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local NAME_CONFIGFS=$(cat "$CONFIGFS_AGG_DIR/$CHIP/line${OFFSET}/name")
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local NAME_CDEV
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if [ "$(cat "$CONFIGFS_AGG_DIR/$CHIP/live")" = 0 ]; then
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echo "$NAME_CONFIGFS"
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else
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NAME_CDEV=$(
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$BASE_DIR/gpio-line-name \
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"/dev/$(agg_configfs_chip_name "$CHIP")" "$OFFSET"
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) || fail "Unable to read the line name from the character device"
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if [ "$NAME_CONFIGFS" != "$NAME_CDEV" ]; then
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fail "Discrepancy between two sources for the name of line"
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fi
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echo "$NAME_CDEV"
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fi
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}
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# Load the modules. This will pull in configfs if needed too.
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modprobe gpio-sim || skip "unable to load the gpio-sim module"
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modprobe gpio-aggregator || skip "unable to load the gpio-aggregator module"
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# Make sure configfs is mounted at /sys/kernel/config. Wait a bit if needed.
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for IDX in $(seq 5); do
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if [ "$IDX" -eq "5" ]; then
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skip "configfs not mounted at /sys/kernel/config"
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fi
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mountpoint -q /sys/kernel/config && break
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sleep 0.1
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done
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# If the module was already loaded: remove all previous chips
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agg_configfs_cleanup
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sim_configfs_cleanup
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trap "exit 1" SIGTERM SIGINT
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trap "agg_configfs_cleanup 1; sim_configfs_cleanup 1" EXIT
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# Use gpio-sim chips as the test backend
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for CHIP in $(seq -f "chip%g" 0 1); do
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mkdir $CONFIGFS_SIM_DIR/$CHIP
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for BANK in $(seq -f "bank%g" 0 1); do
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mkdir -p "$CONFIGFS_SIM_DIR/$CHIP/$BANK"
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echo "${CHIP}_${BANK}" > "$CONFIGFS_SIM_DIR/$CHIP/$BANK/label" || \
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fail "unable to set the chip label"
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echo 16 > "$CONFIGFS_SIM_DIR/$CHIP/$BANK/num_lines" || \
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fail "unable to set the number of lines"
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for IDX in $(seq 0 15); do
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LINE_NAME="${CHIP}${BANK}_${IDX}"
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LINE_DIR="$CONFIGFS_SIM_DIR/$CHIP/$BANK/line$IDX"
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mkdir -p $LINE_DIR
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echo "$LINE_NAME" > "$LINE_DIR/name" || fail "unable to set the line name"
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done
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done
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sim_enable_chip "$CHIP"
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done
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echo "1. GPIO aggregator creation/deletion"
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echo "1.1. Creation/deletion via configfs"
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echo "1.1.1. Minimum creation/deletion"
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agg_create_chip agg0
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agg_create_line agg0 line0
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agg_set_key agg0 line0 "$(sim_get_chip_label chip0 bank0)"
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agg_set_offset agg0 line0 5
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agg_set_line_name agg0 line0 test0
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agg_enable_chip agg0
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test "$(cat "$CONFIGFS_AGG_DIR/agg0/live")" = 1 || fail "chip unexpectedly dead"
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test "$(agg_get_chip_label agg0)" = "$(agg_configfs_dev_name agg0)" || \
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fail "label is inconsistent"
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test "$(agg_get_chip_num_lines agg0)" = "1" || fail "number of lines is not 1"
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test "$(agg_get_line_name agg0 0)" = "test0" || fail "line name is unset"
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agg_disable_chip agg0
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agg_remove_line agg0 line0
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agg_remove_chip agg0
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echo "1.1.2. Complex creation/deletion"
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agg_create_chip agg0
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agg_create_line agg0 line0
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agg_create_line agg0 line1
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agg_create_line agg0 line2
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agg_create_line agg0 line3
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agg_set_key agg0 line0 "$(sim_get_chip_label chip0 bank0)"
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agg_set_key agg0 line1 "$(sim_get_chip_label chip0 bank1)"
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agg_set_key agg0 line2 "$(sim_get_chip_label chip1 bank0)"
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agg_set_key agg0 line3 "$(sim_get_chip_label chip1 bank1)"
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agg_set_offset agg0 line0 1
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agg_set_offset agg0 line1 3
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agg_set_offset agg0 line2 5
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agg_set_offset agg0 line3 7
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agg_set_line_name agg0 line0 test0
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agg_set_line_name agg0 line1 test1
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agg_set_line_name agg0 line2 test2
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agg_set_line_name agg0 line3 test3
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agg_enable_chip agg0
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test "$(cat "$CONFIGFS_AGG_DIR/agg0/live")" = 1 || fail "chip unexpectedly dead"
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test "$(agg_get_chip_label agg0)" = "$(agg_configfs_dev_name agg0)" || \
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fail "label is inconsistent"
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test "$(agg_get_chip_num_lines agg0)" = "4" || fail "number of lines is not 1"
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test "$(agg_get_line_name agg0 0)" = "test0" || fail "line name is unset"
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test "$(agg_get_line_name agg0 1)" = "test1" || fail "line name is unset"
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test "$(agg_get_line_name agg0 2)" = "test2" || fail "line name is unset"
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test "$(agg_get_line_name agg0 3)" = "test3" || fail "line name is unset"
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agg_disable_chip agg0
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agg_remove_line agg0 line0
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agg_remove_line agg0 line1
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agg_remove_line agg0 line2
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agg_remove_line agg0 line3
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agg_remove_chip agg0
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echo "1.1.3. Can't instantiate a chip without any line"
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agg_create_chip agg0
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echo 1 > "$CONFIGFS_AGG_DIR/agg0/live" 2> /dev/null && fail "chip unexpectedly enabled"
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test "$(cat "$CONFIGFS_AGG_DIR/agg0/live")" = 0 || fail "chip unexpectedly alive"
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agg_remove_chip agg0
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echo "1.1.4. Can't instantiate a chip with invalid configuration"
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agg_create_chip agg0
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agg_create_line agg0 line0
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agg_set_key agg0 line0 "chipX_bankX"
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agg_set_offset agg0 line0 99
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agg_set_line_name agg0 line0 test0
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echo 1 > "$CONFIGFS_AGG_DIR/agg0/live" 2> /dev/null && fail "chip unexpectedly enabled"
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test "$(cat "$CONFIGFS_AGG_DIR/agg0/live")" = 0 || fail "chip unexpectedly alive"
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agg_remove_line agg0 line0
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agg_remove_chip agg0
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echo "1.1.5. Can't instantiate a chip asynchronously via deferred probe"
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agg_create_chip agg0
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agg_create_line agg0 line0
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agg_set_key agg0 line0 "chip0_bank0"
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agg_set_offset agg0 line0 5
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agg_set_line_name agg0 line0 test0
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sim_disable_chip chip0
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echo 1 > "$CONFIGFS_AGG_DIR/agg0/live" 2> /dev/null && fail "chip unexpectedly enabled"
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test "$(cat "$CONFIGFS_AGG_DIR/agg0/live")" = 0 || fail "chip unexpectedly alive"
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sim_enable_chip chip0
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sleep 1
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test "$(cat "$CONFIGFS_AGG_DIR/agg0/live")" = 0 || \
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fail "chip unexpectedly transitioned to 'live' state"
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agg_remove_line agg0 line0
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agg_remove_chip agg0
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echo "1.2. Creation/deletion via sysfs"
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echo "1.2.1. Minimum creation/deletion"
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echo "chip0_bank0 0" > "$SYSFS_AGG_DIR/new_device"
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CHIPNAME=$(agg_configfs_chip_name _sysfs.0)
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test "$(cat "$CONFIGFS_AGG_DIR/_sysfs.0/live")" = 1 || fail "chip unexpectedly dead"
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test "$(agg_get_chip_label _sysfs.0)" = "$(agg_configfs_dev_name _sysfs.0)" || \
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fail "label is inconsistent"
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test "$(agg_get_chip_num_lines _sysfs.0)" = "1" || fail "number of lines is not 1"
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test "$(agg_get_line_name _sysfs.0 0)" = "" || fail "line name is unset"
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echo "$(agg_configfs_dev_name _sysfs.0)" > "$SYSFS_AGG_DIR/delete_device"
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test -d $CONFIGFS_AGG_DIR/_sysfs.0 && fail "_sysfs.0 unexpectedly remains"
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test -d /dev/${CHIPNAME} && fail "/dev/${CHIPNAME} unexpectedly remains"
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echo "1.2.2. Complex creation/deletion"
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echo "chip0bank0_0 chip1_bank1 10-11" > "$SYSFS_AGG_DIR/new_device"
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CHIPNAME=$(agg_configfs_chip_name _sysfs.0)
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test "$(cat "$CONFIGFS_AGG_DIR/_sysfs.0/live")" = 1 || fail "chip unexpectedly dead"
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test "$(agg_get_chip_label _sysfs.0)" = "$(agg_configfs_dev_name _sysfs.0)" || \
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fail "label is inconsistent"
358
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test "$(agg_get_chip_num_lines _sysfs.0)" = "3" || fail "number of lines is not 3"
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test "$(agg_get_line_name _sysfs.0 0)" = "" || fail "line name is unset"
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test "$(agg_get_line_name _sysfs.0 1)" = "" || fail "line name is unset"
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test "$(agg_get_line_name _sysfs.0 2)" = "" || fail "line name is unset"
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echo "$(agg_configfs_dev_name _sysfs.0)" > "$SYSFS_AGG_DIR/delete_device"
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test -d $CONFIGFS_AGG_DIR/_sysfs.0 && fail "_sysfs.0 unexpectedly remains"
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test -d /dev/${CHIPNAME} && fail "/dev/${CHIPNAME} unexpectedly remains"
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+
366
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echo "1.2.3. Asynchronous creation with deferred probe"
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sim_disable_chip chip0
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echo 'chip0_bank0 0' > $SYSFS_AGG_DIR/new_device
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sleep 1
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test "$(cat "$CONFIGFS_AGG_DIR/_sysfs.0/live")" = 0 || fail "chip unexpectedly alive"
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sim_enable_chip chip0
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sleep 1
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CHIPNAME=$(agg_configfs_chip_name _sysfs.0)
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test "$(cat "$CONFIGFS_AGG_DIR/_sysfs.0/live")" = 1 || fail "chip unexpectedly remains dead"
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test "$(agg_get_chip_label _sysfs.0)" = "$(agg_configfs_dev_name _sysfs.0)" || \
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fail "label is inconsistent"
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test "$(agg_get_chip_num_lines _sysfs.0)" = "1" || fail "number of lines is not 1"
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test "$(agg_get_line_name _sysfs.0 0)" = "" || fail "line name unexpectedly set"
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echo "$(agg_configfs_dev_name _sysfs.0)" > "$SYSFS_AGG_DIR/delete_device"
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test -d $CONFIGFS_AGG_DIR/_sysfs.0 && fail "_sysfs.0 unexpectedly remains"
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test -d /dev/${CHIPNAME} && fail "/dev/${CHIPNAME} unexpectedly remains"
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+
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echo "1.2.4. Can't instantiate a chip with invalid configuration"
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echo "xyz 0" > "$SYSFS_AGG_DIR/new_device"
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test "$(cat $CONFIGFS_AGG_DIR/_sysfs.0/live)" = 0 || fail "chip unexpectedly alive"
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echo "$(agg_configfs_dev_name _sysfs.0)" > "$SYSFS_AGG_DIR/delete_device"
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+
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echo "2. GPIO aggregator configuration"
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+
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echo "2.1. Configuring aggregators instantiated via configfs"
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setup_2_1() {
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agg_create_chip agg0
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agg_create_line agg0 line0
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agg_create_line agg0 line1
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+
agg_set_key agg0 line0 "$(sim_get_chip_label chip0 bank0)"
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+
agg_set_key agg0 line1 "$(sim_get_chip_label chip1 bank0)"
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agg_set_offset agg0 line0 1
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+
agg_set_offset agg0 line1 3
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agg_set_line_name agg0 line0 test0
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+
agg_set_line_name agg0 line1 test1
401
+
agg_enable_chip agg0
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}
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teardown_2_1() {
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agg_configfs_cleanup
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}
406
+
407
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echo "2.1.1. While offline"
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+
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echo "2.1.1.1. Line can be added/removed"
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+
setup_2_1
411
+
agg_disable_chip agg0
412
+
agg_create_line agg0 line2
413
+
agg_set_key agg0 line2 "$(sim_get_chip_label chip0 bank1)"
414
+
agg_set_offset agg0 line2 5
415
+
agg_enable_chip agg0
416
+
test "$(agg_get_chip_num_lines agg0)" = "3" || fail "number of lines is not 1"
417
+
teardown_2_1
418
+
419
+
echo "2.1.1.2. Line key can be modified"
420
+
setup_2_1
421
+
agg_disable_chip agg0
422
+
agg_set_key agg0 line0 "$(sim_get_chip_label chip0 bank1)"
423
+
agg_set_key agg0 line1 "$(sim_get_chip_label chip1 bank1)"
424
+
agg_enable_chip agg0
425
+
teardown_2_1
426
+
427
+
echo "2.1.1.3. Line name can be modified"
428
+
setup_2_1
429
+
agg_disable_chip agg0
430
+
agg_set_line_name agg0 line0 new0
431
+
agg_set_line_name agg0 line1 new1
432
+
agg_enable_chip agg0
433
+
test "$(agg_get_line_name agg0 0)" = "new0" || fail "line name is unset"
434
+
test "$(agg_get_line_name agg0 1)" = "new1" || fail "line name is unset"
435
+
teardown_2_1
436
+
437
+
echo "2.1.1.4. Line offset can be modified"
438
+
setup_2_1
439
+
agg_disable_chip agg0
440
+
agg_set_offset agg0 line0 5
441
+
agg_set_offset agg0 line1 7
442
+
agg_enable_chip agg0
443
+
teardown_2_1
444
+
445
+
echo "2.1.1.5. Can re-enable a chip after valid reconfiguration"
446
+
setup_2_1
447
+
agg_disable_chip agg0
448
+
agg_set_key agg0 line0 "$(sim_get_chip_label chip1 bank1)"
449
+
agg_set_offset agg0 line0 15
450
+
agg_set_key agg0 line1 "$(sim_get_chip_label chip0 bank1)"
451
+
agg_set_offset agg0 line0 14
452
+
agg_create_line agg0 line2
453
+
agg_set_key agg0 line2 "$(sim_get_chip_label chip0 bank1)"
454
+
agg_set_offset agg0 line2 13
455
+
agg_enable_chip agg0
456
+
test "$(agg_get_chip_num_lines agg0)" = "3" || fail "number of lines is not 1"
457
+
teardown_2_1
458
+
459
+
echo "2.1.1.7. Can't re-enable a chip with invalid reconfiguration"
460
+
setup_2_1
461
+
agg_disable_chip agg0
462
+
agg_set_key agg0 line0 invalidkey
463
+
echo 1 > "$CONFIGFS_AGG_DIR/agg0/live" 2> /dev/null && fail "chip unexpectedly enabled"
464
+
teardown_2_1
465
+
setup_2_1
466
+
agg_disable_chip agg0
467
+
agg_set_offset agg0 line0 99
468
+
echo 1 > "$CONFIGFS_AGG_DIR/agg0/live" 2> /dev/null && fail "chip unexpectedly enabled"
469
+
teardown_2_1
470
+
471
+
echo "2.1.2. While online"
472
+
473
+
echo "2.1.2.1. Can't add/remove line"
474
+
setup_2_1
475
+
mkdir "$CONFIGFS_AGG_DIR/agg0/line2" 2> /dev/null && fail "line unexpectedly added"
476
+
rmdir "$CONFIGFS_AGG_DIR/agg0/line1" 2> /dev/null && fail "line unexpectedly removed"
477
+
teardown_2_1
478
+
479
+
echo "2.1.2.2. Can't modify line key"
480
+
setup_2_1
481
+
echo "chip1_bank1" > "$CONFIGFS_AGG_DIR/agg0/line0/key" 2> /dev/null && \
482
+
fail "lookup key unexpectedly updated"
483
+
teardown_2_1
484
+
485
+
echo "2.1.2.3. Can't modify line name"
486
+
setup_2_1
487
+
echo "new0" > "$CONFIGFS_AGG_DIR/agg0/line0/name" 2> /dev/null && \
488
+
fail "name unexpectedly updated"
489
+
teardown_2_1
490
+
491
+
echo "2.1.2.4. Can't modify line offset"
492
+
setup_2_1
493
+
echo "5" > "$CONFIGFS_AGG_DIR/agg0/line0/offset" 2> /dev/null && \
494
+
fail "offset unexpectedly updated"
495
+
teardown_2_1
496
+
497
+
echo "2.2. Configuring aggregators instantiated via sysfs"
498
+
setup_2_2() {
499
+
echo "chip0_bank0 1 chip1_bank0 3" > "$SYSFS_AGG_DIR/new_device"
500
+
}
501
+
teardown_2_2() {
502
+
echo "$(agg_configfs_dev_name _sysfs.0)" > "$SYSFS_AGG_DIR/delete_device"
503
+
}
504
+
505
+
echo "2.2.1. While online"
506
+
507
+
echo "2.2.1.1. Can toggle live"
508
+
setup_2_2
509
+
agg_disable_chip _sysfs.0
510
+
agg_enable_chip _sysfs.0
511
+
teardown_2_2
512
+
513
+
echo "2.2.1.2. Can't add/remove line"
514
+
setup_2_2
515
+
mkdir "$CONFIGFS_AGG_DIR/_sysfs.0/line2" 2> /dev/null && fail "line unexpectedly added"
516
+
rmdir "$CONFIGFS_AGG_DIR/_sysfs.0/line1" 2> /dev/null && fail "line unexpectedly removed"
517
+
teardown_2_2
518
+
519
+
echo "2.2.1.3. Can't modify line key"
520
+
setup_2_2
521
+
echo "chip1_bank1" > "$CONFIGFS_AGG_DIR/_sysfs.0/line0/key" 2> /dev/null && \
522
+
fail "lookup key unexpectedly updated"
523
+
teardown_2_2
524
+
525
+
echo "2.2.1.4. Can't modify line name"
526
+
setup_2_2
527
+
echo "new0" > "$CONFIGFS_AGG_DIR/_sysfs.0/line0/name" 2> /dev/null && \
528
+
fail "name unexpectedly updated"
529
+
teardown_2_2
530
+
531
+
echo "2.2.1.5. Can't modify line offset"
532
+
setup_2_2
533
+
echo "5" > "$CONFIGFS_AGG_DIR/_sysfs.0/line0/offset" 2> /dev/null && \
534
+
fail "offset unexpectedly updated"
535
+
teardown_2_2
536
+
537
+
echo "2.2.2. While waiting for deferred probe"
538
+
539
+
echo "2.2.2.1. Can't add/remove line despite live = 0"
540
+
sim_disable_chip chip0
541
+
setup_2_2
542
+
mkdir "$CONFIGFS_AGG_DIR/_sysfs.0/line2" 2> /dev/null && fail "line unexpectedly added"
543
+
rmdir "$CONFIGFS_AGG_DIR/_sysfs.0/line1" 2> /dev/null && fail "line unexpectedly removed"
544
+
teardown_2_2
545
+
sim_enable_chip chip0
546
+
547
+
echo "2.2.2.2. Can't modify line key"
548
+
sim_disable_chip chip0
549
+
setup_2_2
550
+
echo "chip1_bank1" > "$CONFIGFS_AGG_DIR/_sysfs.0/line0/key" 2> /dev/null && \
551
+
fail "lookup key unexpectedly updated"
552
+
teardown_2_2
553
+
sim_enable_chip chip0
554
+
555
+
echo "2.2.2.3. Can't modify line name"
556
+
sim_disable_chip chip0
557
+
setup_2_2
558
+
echo "new0" > "$CONFIGFS_AGG_DIR/_sysfs.0/line0/name" 2> /dev/null && \
559
+
fail "name unexpectedly updated"
560
+
teardown_2_2
561
+
sim_enable_chip chip0
562
+
563
+
echo "2.2.2.4. Can't modify line offset"
564
+
sim_disable_chip chip0
565
+
setup_2_2
566
+
echo 5 > "$CONFIGFS_AGG_DIR/_sysfs.0/line0/offset" 2> /dev/null && \
567
+
fail "offset unexpectedly updated"
568
+
teardown_2_2
569
+
sim_enable_chip chip0
570
+
571
+
echo "2.2.2.5. Can't toggle live"
572
+
sim_disable_chip chip0
573
+
setup_2_2
574
+
test "$(cat "$CONFIGFS_AGG_DIR/_sysfs.0/live")" = 0 || fail "chip unexpectedly alive"
575
+
echo 1 > "$CONFIGFS_AGG_DIR/_sysfs.0/live" 2> /dev/null && fail "chip unexpectedly enabled"
576
+
teardown_2_2
577
+
sim_enable_chip chip0
578
+
579
+
echo "2.2.3. While offline"
580
+
581
+
echo "2.2.3.1. Can't add/remove line despite live = 0"
582
+
setup_2_2
583
+
agg_disable_chip _sysfs.0
584
+
mkdir "$CONFIGFS_AGG_DIR/_sysfs.0/line2" 2> /dev/null && fail "line unexpectedly added"
585
+
rmdir "$CONFIGFS_AGG_DIR/_sysfs.0/line1" 2> /dev/null && fail "line unexpectedly removed"
586
+
teardown_2_2
587
+
588
+
echo "2.2.3.2. Line key can be modified"
589
+
setup_2_2
590
+
agg_disable_chip _sysfs.0
591
+
agg_set_key _sysfs.0 line0 "$(sim_get_chip_label chip0 bank1)"
592
+
agg_set_key _sysfs.0 line1 "$(sim_get_chip_label chip1 bank1)"
593
+
agg_enable_chip _sysfs.0
594
+
teardown_2_2
595
+
596
+
echo "2.2.3.3. Line name can be modified"
597
+
setup_2_2
598
+
agg_disable_chip _sysfs.0
599
+
agg_set_line_name _sysfs.0 line0 new0
600
+
agg_set_line_name _sysfs.0 line1 new1
601
+
agg_enable_chip _sysfs.0
602
+
test "$(agg_get_line_name _sysfs.0 0)" = "new0" || fail "line name is unset"
603
+
test "$(agg_get_line_name _sysfs.0 1)" = "new1" || fail "line name is unset"
604
+
teardown_2_2
605
+
606
+
echo "2.2.3.4. Line offset can be modified"
607
+
setup_2_2
608
+
agg_disable_chip _sysfs.0
609
+
agg_set_offset _sysfs.0 line0 5
610
+
agg_set_offset _sysfs.0 line1 7
611
+
agg_enable_chip _sysfs.0
612
+
teardown_2_2
613
+
614
+
echo "2.2.3.5. Can re-enable a chip with valid reconfiguration"
615
+
setup_2_2
616
+
agg_disable_chip _sysfs.0
617
+
agg_set_key _sysfs.0 line0 "$(sim_get_chip_label chip1 bank1)"
618
+
agg_set_offset _sysfs.0 line0 15
619
+
agg_set_key _sysfs.0 line1 "$(sim_get_chip_label chip0 bank1)"
620
+
agg_set_offset _sysfs.0 line0 14
621
+
agg_enable_chip _sysfs.0
622
+
teardown_2_2
623
+
624
+
echo "2.2.3.6. Can't re-enable a chip with invalid reconfiguration"
625
+
setup_2_2
626
+
agg_disable_chip _sysfs.0
627
+
agg_set_key _sysfs.0 line0 invalidkey
628
+
echo 1 > "$CONFIGFS_AGG_DIR/_sysfs.0/live" 2> /dev/null && fail "chip unexpectedly enabled"
629
+
teardown_2_2
630
+
setup_2_2
631
+
agg_disable_chip _sysfs.0
632
+
agg_set_offset _sysfs.0 line0 99
633
+
echo 1 > "$CONFIGFS_AGG_DIR/_sysfs.0/live" 2> /dev/null && fail "chip unexpectedly enabled"
634
+
teardown_2_2
635
+
636
+
echo "3. Module unload"
637
+
638
+
echo "3.1. Can't unload module if there is at least one device created via configfs"
639
+
agg_create_chip agg0
640
+
modprobe -r gpio-aggregator 2> /dev/null
641
+
test -d /sys/module/gpio_aggregator || fail "module unexpectedly unloaded"
642
+
agg_remove_chip agg0
643
+
644
+
echo "3.2. Can unload module if there is no device created via configfs"
645
+
echo "chip0_bank0 1 chip1_bank0 3" > "$SYSFS_AGG_DIR/new_device"
646
+
modprobe -r gpio-aggregator 2> /dev/null
647
+
test -d /sys/module/gpio_aggregator && fail "module unexpectedly remains to be loaded"
648
+
modprobe gpio-aggregator 2> /dev/null
649
+
650
+
echo "4. GPIO forwarder functional"
651
+
SETTINGS="chip0:bank0:2 chip0:bank1:4 chip1:bank0:6 chip1:bank1:8"
652
+
setup_4() {
653
+
local OFFSET=0
654
+
agg_create_chip agg0
655
+
for SETTING in $SETTINGS; do
656
+
CHIP=$(echo "$SETTING" | cut -d: -f1)
657
+
BANK=$(echo "$SETTING" | cut -d: -f2)
658
+
LINE=$(echo "$SETTING" | cut -d: -f3)
659
+
agg_create_line agg0 "line${OFFSET}"
660
+
agg_set_key agg0 "line${OFFSET}" "$(sim_get_chip_label "$CHIP" "$BANK")"
661
+
agg_set_offset agg0 "line${OFFSET}" "$LINE"
662
+
OFFSET=$(expr $OFFSET + 1)
663
+
done
664
+
agg_enable_chip agg0
665
+
}
666
+
teardown_4() {
667
+
agg_configfs_cleanup
668
+
}
669
+
670
+
echo "4.1. Forwarding set values"
671
+
setup_4
672
+
OFFSET=0
673
+
for SETTING in $SETTINGS; do
674
+
CHIP=$(echo "$SETTING" | cut -d: -f1)
675
+
BANK=$(echo "$SETTING" | cut -d: -f2)
676
+
LINE=$(echo "$SETTING" | cut -d: -f3)
677
+
DEVNAME=$(cat "$CONFIGFS_SIM_DIR/$CHIP/dev_name")
678
+
CHIPNAME=$(cat "$CONFIGFS_SIM_DIR/$CHIP/$BANK/chip_name")
679
+
VAL_PATH="/sys/devices/platform/$DEVNAME/$CHIPNAME/sim_gpio${LINE}/value"
680
+
test $(cat $VAL_PATH) = "0" || fail "incorrect value read from sysfs"
681
+
$BASE_DIR/gpio-mockup-cdev -s 1 "/dev/$(agg_configfs_chip_name agg0)" "$OFFSET" &
682
+
mock_pid=$!
683
+
sleep 0.1 # FIXME Any better way?
684
+
test "$(cat $VAL_PATH)" = "1" || fail "incorrect value read from sysfs"
685
+
kill "$mock_pid"
686
+
OFFSET=$(expr $OFFSET + 1)
687
+
done
688
+
teardown_4
689
+
690
+
echo "4.2. Forwarding set config"
691
+
setup_4
692
+
OFFSET=0
693
+
for SETTING in $SETTINGS; do
694
+
CHIP=$(echo "$SETTING" | cut -d: -f1)
695
+
BANK=$(echo "$SETTING" | cut -d: -f2)
696
+
LINE=$(echo "$SETTING" | cut -d: -f3)
697
+
DEVNAME=$(cat "$CONFIGFS_SIM_DIR/$CHIP/dev_name")
698
+
CHIPNAME=$(cat "$CONFIGFS_SIM_DIR/$CHIP/$BANK/chip_name")
699
+
VAL_PATH="/sys/devices/platform/$DEVNAME/$CHIPNAME/sim_gpio${LINE}/value"
700
+
$BASE_DIR/gpio-mockup-cdev -b pull-up "/dev/$(agg_configfs_chip_name agg0)" "$OFFSET"
701
+
test $(cat "$VAL_PATH") = "1" || fail "incorrect value read from sysfs"
702
+
OFFSET=$(expr $OFFSET + 1)
703
+
done
704
+
teardown_4
705
+
706
+
echo "5. Race condition verification"
707
+
708
+
echo "5.1. Stress test of new_device/delete_device and module load/unload"
709
+
for _ in $(seq 1000); do
710
+
{
711
+
echo "dummy 0" > "$SYSFS_AGG_DIR/new_device"
712
+
cat "$CONFIGFS_AGG_DIR/_sysfs.0/dev_name" > "$SYSFS_AGG_DIR/delete_device"
713
+
} 2> /dev/null
714
+
done &
715
+
writer_pid=$!
716
+
while kill -0 "$writer_pid" 2> /dev/null; do
717
+
{
718
+
modprobe gpio-aggregator
719
+
modprobe -r gpio-aggregator
720
+
} 2> /dev/null
721
+
done
722
+
723
+
echo "GPIO $MODULE test PASS"