Thanks. I get this, but even Uboot is likely too late. I have some HAT boards that require a pin to be high to enable a power supply. Hence, if that pin is low on power-up, the supply will turn off before the CPU boots far enough to keep the supply on. I can modify my boards, but I want them to work...

I have a need to configure some of the GPIOs on the NanoPI M4 to use their internal pullups at power up. Is there a way to do that? Or am I stuck based on the specific GPIOs brought out to the header on this board? I'm trying to sue an existing HAT board which is why I ask. I know I can add the resi...