How to implement interrupts

[mehmetalianil]

The device driver can be ignorant on how the interrupt is handled. Interrupt functionality can be limited to the conditions of the irq.
@dirbao explained in chat:

tldr today you can either

leave it up to the user, ask them to call a fn on irq
This requires explicit user action.
use async WaitForHigh/WaitForLow
This requires to go for embassy hal
try to come up with a non-async IrqPin trait, but there's been heaps of discussion about this in e-h and it hasn't happened because it's nontrivial (impossible?)
dunno.

[mehmetalianil]

Also, we need to expose interrupt sources outside the INT register, as here:
https://github.com/zephyrproject-rtos/hal_st/blob/master/sensor/stmemsc/iis3dwb_STdC/driver/iis3dwb_reg.c