ASUS TinkerBoard Setup
Setup notes for Armbian.
I/O File Permissions
File /etc/udev/rules.d/70-gpio.rules
:
# Allow group gpio to access gpiomem device
SUBSYSTEM=="rk3288-gpiomem", GROUP="gpio", MODE="0660"
# Allow group gpio to access gpiochip files
SUBSYSTEM=="gpio", GROUP="gpio", MODE="0660"
# To allow additional features like edge detection
SUBSYSTEM=="gpio*", PROGRAM="/bin/sh -c '\
chown -R root:gpio /sys/class/gpio && chmod -R 770 /sys/class/gpio;\
chown -R root:gpio /sys/devices/virtual/gpio && chmod -R 770 /sys/devices/virtual/gpio;\
chown -R root:gpio /sys$devpath && chmod -R 770 /sys$devpath\
'"