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Hello,

On Oct 27, 2006, at 17:49, Marco Trillo wrote:
>
> I've found a 'fan' node on /pci@f2000000/mac-io@17/gpio@50/fan@0 .
> It has a 'compatible' property with value 'fan-gpio':
>
> 0 > dev fan ok
> 0 > .properties
> name                    fan
> device_type             fan
> compatible              fan-gpio
>                        fan
>
> built-in
> reg                     00000000
> platform-GetFanSpeed    ff97a768

Probably a gpio to turn the fan on and off.

> It appears like a simple controller. The value "ff97a768" appears to
> be constant and independent of any system load or temperature...

I guess it's the OF node number for whatever you're supposed to use to 
read fan speed. Just ofctl -p |grep ff97a768 to see which node it 
refers to.

have fun
Michael
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