But when I use " root@linux:/home/sercomm# echo 64 > /sys/class/gpio/export" command on our customized board base on the Nano production moudle, it turns out failure.
since you’re develop a customized board, had you refer to Jetson Nano Product Design Guide for recommendations and guidelines.
you may also access Jetson Nano Pinmux to have customize and to update the board configuration files.
thanks
This issue is solved. My solution was to convert the dtb into dts, find out the node entry which used this property (“i2c-mux-gpio”), remove the entry and recompile the dts back into dtb. Some camera i2c driver was reading this node and since we do not have any camera hardware on the custom board, removing it made sense. Perhaps not the most elegant solution but worked for me.
Now I have a different problem, on the “production” module, the software is not able to drive PI.00 sufficiently low. Opening a new issue for the same.