K 10
svn:author
V 10
nwhitehorn
K 8
svn:date
V 27
2009-01-12T01:36:01.308298Z
K 7
svn:log
V 209
Some early Macintosh GPIO controllers don't provide reg properties for
interrupt-only GPIOs. Honor this, and allow interrupt attachment, but not
read/write access for such devices.

Reported by:	Niels Eliasen

END