Manual fan control on iBook G4?
Nathan Whitehorn
nwhitehorn at freebsd.org
Mon Jul 28 17:01:23 UTC 2014
On 07/28/14 09:16, Alexey Dokuchaev wrote:
> On Mon, Jul 28, 2014 at 09:02:45AM -0700, Justin Hibbits wrote:
>> If you do 'ofwdump -ap', it'll list everything from Open Firmware,
>> including the fan data (likely i2c-based, look for adm* or adt*).
> Right, thanks for the hint! Some interesting data:
>
> 1) It is indeed PowerBook6,5 model
> 2) Fan data (it was adt*):
>
> Node 0xff963c08: fan
> name:
> 66 61 6e 00
> 'fan'
> device_type:
> 61 64 74 37 34 36 37 00
> 'adt7467'
> compatible:
> 61 64 74 37 34 36 37 00
> 'adt7467'
> ...
> Node 0xff964910: fan1
> name:
> 66 61 6e 31 00
> 'fan1'
> reg:
> 00 00 00 28
> sensor-id:
> 00 00 00 20
> version:
> 00 00 00 02
> ...
>
>> It's possible the CPU is starting in the reduced clock speed, so you
>> can check `dev.cpu' syctl to see what levels are supported.
> Again, seems you're correct:
>
> dev.cpu.0.%desc: Open Firmware CPU
> dev.cpu.0.%driver: cpu
> dev.cpu.0.%pnpinfo: name=PowerPC,G4
> dev.cpu.0.%parent: cpulist0
> dev.cpu.0.freq: 533
> dev.cpu.0.freq_levels: 1066/-1 533/-1
To be very explicit on this last point, doing sysctl dev.cpu.0.freq=1066
(or enabling powerd) will give you your full 1 GHz.
-Nathan
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