High Precision Timer on JS20

[Segher Boessenkool]

> I'm now trying to use the High Precision Timer (HPET) of the 8111
> Hypertransport IO hub. This function is part of the LPC sub-device
> which
> is supposed to be probed as a pci sub-device (device B, function 0 in
> the IO Hub doc.).

You'll have to enable it first (DevB:0xa0).

> But it seems that the only sub-device listed in the device tree and
> detected through the pci scan is the IDE controller which is the
> function 1 of this part of the IO hub.
>
> Even trying to reach the function 0 (and the other available functions)
> through pci_config_read call is failing (returning 0xffffffff).

Function 0 can't be disabled; you must be doing something wrong.
Maybe you're trying for the wrong address?  Bus 0 dev 4 func 0 is
what you're after...


Segher


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