Andreas Tobler 0cb9915474 Add support for PWM controlled fans. I found these fans on my PowerMac9,1.
These fans are not located under the same node as the the RPM controlled ones,
So I had to adapt the current source to parse and fill the properties correctly.
To control the fans we can set the PWM ratio via sysctl between 20 and 100%.

Tested by:	nwhitehorn
MFC after:	3 weeks
2012-03-04 08:43:33 +00:00
..
2012-02-04 23:25:18 +00:00
2011-12-05 14:13:21 +00:00
2012-02-15 16:59:24 +00:00