Re: Acer Aspire One fan control
From: Peter Feuerer
Date: Fri Feb 13 2009 - 13:59:25 EST
Matthew Garrett writes:
That depends on how you're doing it. Is the code available somewhere?
Just cleaned up the code and released it on my homepage, you can download
it from: http://piie.net/files/acerhdf_kmod-0.2.tar.gz
If
these io ports are also used by the firmware then you'll need to find
ACPI methods to call to perform the fan control.
I get the temperature by calling ec_read(0x58) and can read/write the state
of the fan by ec_write to / ec_read from 0x55. Actually I don't know if
those embedded controller registers are used by the firmware. How can I find
it out?
If there aren't any
then it's not safe to have a driver to do this.
I think there should not be a problem when calling ec_write and ec_read
from my kernel module, as those functions are atomic. Or am I wrong?
--peter
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