I’m trying to use GPIO3_PAA.00, GPIO3_PAA.01 as GPIO outputs - I was able to use GPIO3_PAA.01 easily, but GPIO3_PAA.00 is not driving an output signal.
I’ve used the pinmux spreadsheet to generate gpio / pinmux dtsi files, and included the relevant changes in my dtsi.
I can see in the following line in dmesg on boot:
GPIO line 296 (gpio3_paa.00) hogged as output/high
However, probing my board I do not see the output on that line being driven high.
I’ve also tried toggling the GPIO through sysfs, and while the output value gets reported as 1, I don’t see a change in voltage when probing the board.
> cd /sys/class/gpio/ /sys/class/gpio# echo 296 > export /sys/class/gpio# cd gpio296 /sys/class/gpio/gpio296# cat direction out /sys/class/gpio/gpio296# cat value 1 /sys/class/gpio/gpio296# echo 0 > value /sys/class/gpio/gpio296# echo 1 > value