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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /tools/testing/selftests/gpio/gpio-mockup-sysfs.sh
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tools/testing/selftests/gpio/gpio-mockup-sysfs.sh')
-rwxr-xr-xtools/testing/selftests/gpio/gpio-mockup-sysfs.sh77
1 files changed, 77 insertions, 0 deletions
diff --git a/tools/testing/selftests/gpio/gpio-mockup-sysfs.sh b/tools/testing/selftests/gpio/gpio-mockup-sysfs.sh
new file mode 100755
index 000000000..2d2e5d876
--- /dev/null
+++ b/tools/testing/selftests/gpio/gpio-mockup-sysfs.sh
@@ -0,0 +1,77 @@
+
+# SPDX-License-Identifier: GPL-2.0
+
+# Overrides functions in gpio-mockup.sh to test using the GPIO SYSFS uAPI
+
+SYSFS=`grep -w sysfs /proc/mounts | cut -f2 -d' '`
+[ -d "$SYSFS" ] || skip "sysfs is not mounted"
+
+GPIO_SYSFS="${SYSFS}/class/gpio"
+[ -d "$GPIO_SYSFS" ] || skip "CONFIG_GPIO_SYSFS is not selected"
+
+PLATFORM_SYSFS=$SYSFS/devices/platform
+
+sysfs_nr=
+sysfs_ldir=
+
+# determine the sysfs GPIO number given the $chip and $offset
+# e.g. gpiochip1:32
+find_sysfs_nr()
+{
+ # e.g. /sys/devices/platform/gpio-mockup.1/gpiochip1
+ local platform=$(find $PLATFORM_SYSFS -mindepth 2 -maxdepth 2 -type d -name $chip)
+ [ "$platform" ] || fail "can't find platform of $chip"
+ # e.g. /sys/devices/platform/gpio-mockup.1/gpio/gpiochip508/base
+ local base=$(find ${platform%/*}/gpio/ -mindepth 2 -maxdepth 2 -type f -name base)
+ [ "$base" ] || fail "can't find base of $chip"
+ sysfs_nr=$(($(< "$base") + $offset))
+ sysfs_ldir="$GPIO_SYSFS/gpio$sysfs_nr"
+}
+
+acquire_line()
+{
+ [ "$sysfs_nr" ] && return
+ find_sysfs_nr
+ echo "$sysfs_nr" > "$GPIO_SYSFS/export"
+}
+
+# The helpers being overridden...
+get_line()
+{
+ [ -e "$sysfs_ldir/value" ] && echo $(< "$sysfs_ldir/value")
+}
+
+set_line()
+{
+ acquire_line
+
+ for option in $*; do
+ case $option in
+ active-high)
+ echo 0 > "$sysfs_ldir/active_low"
+ ;;
+ active-low)
+ echo 1 > "$sysfs_ldir/active_low"
+ ;;
+ input)
+ echo "in" > "$sysfs_ldir/direction"
+ ;;
+ 0)
+ echo "out" > "$sysfs_ldir/direction"
+ echo 0 > "$sysfs_ldir/value"
+ ;;
+ 1)
+ echo "out" > "$sysfs_ldir/direction"
+ echo 1 > "$sysfs_ldir/value"
+ ;;
+ esac
+ done
+}
+
+release_line()
+{
+ [ "$sysfs_nr" ] || return 0
+ echo "$sysfs_nr" > "$GPIO_SYSFS/unexport"
+ sysfs_nr=
+ sysfs_ldir=
+}