In the Orin Nano, the SPE R5 can only access modules within the AON cluster. How can we determine which GPIOs belong to the AON cluster?
You can check the Orin TRM for the details about AON cluster, and modules in AON.
A simple way to list AON GPIOs is to dump the sys-FS node directly.
root@tegra-ubuntu:/home/nvidia# cat /sys/kernel/debug/gpio
gpiochip1: GPIOs 316-347, parent: platform/c2f0000.gpio, tegra234-gpio-aon:
gpio-316 (PAA.00 )
gpio-317 (PAA.01 )
gpio-318 (PAA.02 )
…
br
ChenJian