Greetings @mi3,
First of all what version of our BSP are you working with here?
Based off the pin names being used in your device tree snippet it looks like something earlier than our current BSP 5.
It’s not obvious to me at the moment what could be wrong with your setup. However as a reference you could checkout this other thread where another customer accomplished a similar task: iMX8QXP Colibri and CONFIG_POWER_RESET_GPIO for powering off the board
I mean this is on the Colibri i.MX8X but it should be similar enough for the Apalis i.MX8. Also the work here is done on our BSP 5, I’m not sure how much of it transfers to this older version of the BSP you have.
Looking over the thread one easy thing to miss is maybe you don’t have CONFIG_POWER_RESET_GPIO enabled in the kernel?
Best Regards,
Jeremias