On Tuesday, February 11, 2003, at 09:59  AM, Jaromir Dolecek wrote:

> Jared D. McNeill wrote:
>> How are you associating the acpifan driver with acpitz?
>
> Not at all at this moment. I'm not sure how properly
> export the fan list from ACPI thermal zone. I didn't think
> about this too hard yet, to be honest.

Each ACPI thermal zone has a control method (can't remember the name 
off-hand, sorry) to return a list of 'ACPI handles' to devices in that 
zone.

My idea was to have the acpifan driver register a list of callbacks, 
something like:
    thermal_zone_register(sc->sc_acpihandle, &fan_tz_if, sc);
And when the device is detached:
    thermal_zone_unregister(sc->sc_acpihandle);

That way different instances of acpitz (ie different "zones") can 
lookup in a list that thermal_zone_register creates the devices that 
are present in its zone, and execute callbacks for them. This makes it 
a bit more flexible than having acpitz call the fan _ON/_OFF CMs 
explicitly (it also allows us to hook in other devices, such as an 
'ACPI processor').

Cheers,
Jared