GPIO Output about linux-udoo HOT 3 CLOSED

Please check it:

echo out > direction
[root@h4 gpio127]# cat value
0
[root@h4 gpio127]# echo 0 > active_low
[root@h4 gpio127]# cat value
0
[root@h4 gpio127]# echo 1 > active_low
[root@h4 gpio127]# cat value
1

If it not worki like you want please try revert gpio polarization commit and supply some feedback.

from linux-udoo.

root@bastus:/sys/class/gpio/gpio127# echo out > direction
root@bastus:/sys/class/gpio/gpio127# cat value
0
root@bastus:/sys/class/gpio/gpio127# echo 0 > active_low
root@bastus:/sys/class/gpio/gpio127# cat value
0
root@bastus:/sys/class/gpio/gpio127# echo 1 > active_low
root@bastus:/sys/class/gpio/gpio127# cat value
1
root@bastus:/sys/class/gpio/gpio127# echo 0 > value
root@bastus:/sys/class/gpio/gpio127# cat value
1
As you see is working but i need to change the 'value' not 'active low'.

It works like that on a respberry pi:

root@yo4:/sys/class/gpio/gpio21# echo out > direction
root@yo4:/sys/class/gpio/gpio21# cat value
0
root@yo4:/sys/class/gpio/gpio21# echo 0 > active_low
root@yo4:/sys/class/gpio/gpio21# cat value
0
root@yo4:/sys/class/gpio/gpio21# echo 1 > active_low
root@yo4:/sys/class/gpio/gpio21# cat value
1
root@yo4:/sys/class/gpio/gpio21# echo 0 > value
root@yo4:/sys/class/gpio/gpio21# cat value
0
root@yo4:/sys/class/gpio/gpio21#

from linux-udoo.

Do you have some patches on RPi ? Could you revert dd5bf16 and test it again?

from linux-udoo.