Shouldn’t the firmware be open source? That would at least allow people to improve upon it and add features like booting the pi when power is re-supplied to the hat.
Try this:
In a quest not to need an external button press, have the system boot as soon as DC power is available, and allow the system to shutdown gracefully, I have developed the following method and want to share for those that will benefit.
This aims to:
Safely (gracefully) shutdown the pi
Enter EDM mode, just before halt, reboot, or poweroff (as catch alls, the behavior is the same)
Allow the system to boot without external intervention as soon as power is applied (no button press)
As mentioned in…
It will put the unit in EDM mode, which means once power is resupplied, it will power back on.