feature request: expose power button and shutdown command via i2c

[prokrypt]

Enables safe shutdown of system and paves the way for implementing sleep.

We probably need a discussion to determine how to expose the power button. As a keyboard keycode? Separate register?

[benklop]

I think a separate register is a better idea.

[madcock]

Related:
https://forum.clockworkpi.com/t/plans-for-keyboard-battery-stm32-firmware/17009/8

[sashimanu-san]

A keycode would be nice: power button is a button and handling an event is handier than polling a register

[prokrypt]

A keycode would be nice: power button is a button and handling an event is handier than polling a register

I agree. Technically a separate register is the right way to do it as keyboard and power button (handled by the axp chip) are separate systems, but just yeeting off a keycode is both simple to implement and requires minimal changes to software (picomite, micropython, etc) to handle.

Of course, I say simple, but I probably won't be the one to implement it 🤪