122f6592bSBamvor Jian Zhang 2b2441318SGreg Kroah-Hartman# SPDX-License-Identifier: GPL-2.0 3*8bc395a6SKent Gibson 4*8bc395a6SKent Gibson# Overrides functions in gpio-mockup.sh to test using the GPIO SYSFS uAPI 5*8bc395a6SKent Gibson 6*8bc395a6SKent GibsonSYSFS=`grep -w sysfs /proc/mounts | cut -f2 -d' '` 7*8bc395a6SKent Gibson[ -d "$SYSFS" ] || skip "sysfs is not mounted" 8*8bc395a6SKent Gibson 9*8bc395a6SKent GibsonGPIO_SYSFS="${SYSFS}/class/gpio" 10*8bc395a6SKent Gibson[ -d "$GPIO_SYSFS" ] || skip "CONFIG_GPIO_SYSFS is not selected" 11*8bc395a6SKent Gibson 12*8bc395a6SKent GibsonPLATFORM_SYSFS=$SYSFS/devices/platform 13*8bc395a6SKent Gibson 14*8bc395a6SKent Gibsonsysfs_nr= 15*8bc395a6SKent Gibsonsysfs_ldir= 16*8bc395a6SKent Gibson 17*8bc395a6SKent Gibson# determine the sysfs GPIO number given the $chip and $offset 18*8bc395a6SKent Gibson# e.g. gpiochip1:32 19*8bc395a6SKent Gibsonfind_sysfs_nr() 2022f6592bSBamvor Jian Zhang{ 21*8bc395a6SKent Gibson # e.g. /sys/devices/platform/gpio-mockup.1/gpiochip1 22*8bc395a6SKent Gibson local platform=$(find $PLATFORM_SYSFS -mindepth 2 -maxdepth 2 -type d -name $chip) 23*8bc395a6SKent Gibson [ "$platform" ] || fail "can't find platform of $chip" 24*8bc395a6SKent Gibson # e.g. /sys/devices/platform/gpio-mockup.1/gpio/gpiochip508/base 25*8bc395a6SKent Gibson local base=$(find ${platform%/*}/gpio/ -mindepth 2 -maxdepth 2 -type f -name base) 26*8bc395a6SKent Gibson [ "$base" ] || fail "can't find base of $chip" 27*8bc395a6SKent Gibson sysfs_nr=$(($(< "$base") + $offset)) 28*8bc395a6SKent Gibson sysfs_ldir="$GPIO_SYSFS/gpio$sysfs_nr" 2922f6592bSBamvor Jian Zhang} 3022f6592bSBamvor Jian Zhang 31*8bc395a6SKent Gibsonacquire_line() 3222f6592bSBamvor Jian Zhang{ 33*8bc395a6SKent Gibson [ "$sysfs_nr" ] && return 34*8bc395a6SKent Gibson find_sysfs_nr 35*8bc395a6SKent Gibson echo "$sysfs_nr" > "$GPIO_SYSFS/export" 3622f6592bSBamvor Jian Zhang} 3722f6592bSBamvor Jian Zhang 38*8bc395a6SKent Gibson# The helpers being overridden... 39*8bc395a6SKent Gibsonget_line() 4022f6592bSBamvor Jian Zhang{ 41*8bc395a6SKent Gibson [ -e "$sysfs_ldir/value" ] && echo $(< "$sysfs_ldir/value") 4222f6592bSBamvor Jian Zhang} 4322f6592bSBamvor Jian Zhang 44*8bc395a6SKent Gibsonset_line() 4522f6592bSBamvor Jian Zhang{ 46*8bc395a6SKent Gibson acquire_line 4722f6592bSBamvor Jian Zhang 48*8bc395a6SKent Gibson for option in $*; do 49*8bc395a6SKent Gibson case $option in 50*8bc395a6SKent Gibson active-high) 51*8bc395a6SKent Gibson echo 0 > "$sysfs_ldir/active_low" 52*8bc395a6SKent Gibson ;; 53*8bc395a6SKent Gibson active-low) 54*8bc395a6SKent Gibson echo 1 > "$sysfs_ldir/active_low" 55*8bc395a6SKent Gibson ;; 56*8bc395a6SKent Gibson input) 57*8bc395a6SKent Gibson echo "in" > "$sysfs_ldir/direction" 58*8bc395a6SKent Gibson ;; 59*8bc395a6SKent Gibson 0) 60*8bc395a6SKent Gibson echo "out" > "$sysfs_ldir/direction" 61*8bc395a6SKent Gibson echo 0 > "$sysfs_ldir/value" 62*8bc395a6SKent Gibson ;; 63*8bc395a6SKent Gibson 1) 64*8bc395a6SKent Gibson echo "out" > "$sysfs_ldir/direction" 65*8bc395a6SKent Gibson echo 1 > "$sysfs_ldir/value" 66*8bc395a6SKent Gibson ;; 67*8bc395a6SKent Gibson esac 6822f6592bSBamvor Jian Zhang done 6922f6592bSBamvor Jian Zhang} 7022f6592bSBamvor Jian Zhang 71*8bc395a6SKent Gibsonrelease_line() 72*8bc395a6SKent Gibson{ 73*8bc395a6SKent Gibson [ "$sysfs_nr" ] || return 0 74*8bc395a6SKent Gibson echo "$sysfs_nr" > "$GPIO_SYSFS/unexport" 75*8bc395a6SKent Gibson sysfs_nr= 76*8bc395a6SKent Gibson sysfs_ldir= 77*8bc395a6SKent Gibson} 78