GPIO I2C SPI

[fabiodive <fabiodive%gmail.com@localhost>]

Hello all,

at http://wiki.netbsd.org/ports/evbarm/raspberry_pi/
there is a nice table with the current features of NetBSD on RPI,

I would like to know if NetBSD supports to writing/receiving to:

GPIO pins
SPI bus
I2C bus

if somebody has experience..which directives should I use to enable
the above features into the kernel and provide the user-space of the 
interfaces? 

Thank you
Fabio Balzano