My Pi Zero is powered by a small ATX PC power supply that is also powering a few other components: projector, audio amplifier. I'm using the
gpio-shutdown device tree overlay to add a power button on the BCM pin 3 interrupt.
This works great, except that the Pi initiates the boot sequence when the PC power supply is turned on. This is not what I want; I want the boot sequence to start only after power is applied AND the power button attached to BCM 3 is pressed.
Is there a way to accomplish this - to start the Pi when the power button attached to BCM 3 is pressed?