Tool/software:
Hi TI,
I can't get gpio value, below is details:
1.get by gpio sysfs(gpio config has been added in dts )
echo 547 > /sys/class/gpio/export
echo out > /sys/class/gpio/gpio547/direction
echo 1 > /sys/class/gpio/gpio547/value
The gpio status is high checked by multimeter, and it become low by 'echo 0 > /sys/class/gpio/gpio547/value'.
But, use 'cat /sys/class/gpio/gpio547/value', it always return 0.
2.get by gpioget
gpioset -c /dev/gpiochip1 11=1 - need to ctrl+c to stop manually
The gpio status is high checked by multimeter, and it become low by 'gpioset -c /dev/gpiochip1 11=0'.
But, use 'gpioget -c /dev/gpiochip1 --numeric 11', it return '0', and the gpio status become low checked by multimeter,
I think 'gpioget' will set the gpio as input direction.
'gpioset -c /dev/gpiochip1 11=1' - gpio become output checked by 'gpioinfo'
'gpioget -c /dev/gpiochip1 --numeric 11' - gpio become input checked by 'gpioinfo'
So, which is the right way to get gpio value? Can you give me some advices.
Thanks.
Tao
