Driver Validation

After system boot-up, you can run the following commands to verify if the GPIO driver is working properly.

# cd /sys/class/gpio/ 
# ls
export	gpiochipO	gpiochip64	unexport
# echo 44 > export		
# ls			
export	gpio44	gpiochipO	gpiochip64	unexport
# cd gpio44/		
# ls			
active_low	direction	subsystem	value
device	edge	uevent	
# cat direction 
in
# cat value
1