power(4) – hppa power button and power fail support
power(4) – landisk power switch
power(4) – sparc64 power button
POWER(4) Device Drivers Manual (sparc64) POWER(4)

powerpower button

power* at ebus?

Some UltraSPARC host bridges provide an interrupt when the power button is depressed. The power driver catches that interrupt. If the hw.allowpowerdown sysctl(8) is set to 1, power will signal init(8) to do a clean shutdown.

ebus(4), intro(4), init(8), rc.shutdown(8), sysctl(8)

The power driver was first supported in OpenBSD 4.0.

The driver was written by Jason Wright <jason@thought.net>.

July 16, 2013 OpenBSD 7.5