Re: [PATCH] hpet: Enable hidden HPET on NVidia motherboards

[Alistair John Strachan <s0348365@sms.ed.ac.uk>]

On Sunday 15 April 2007 21:14, Mikko Tiihonen wrote:
> Enables HPET for NVidia motherboards with broken BIOS. The patch reads the
> HPET address from the pci config space. The patch should also work if ACPI
> is disabled.
>
> The HPET search is done in early-quirks because even
> DECLARE_PCI_FIXUP_EARLY was too late. If the new quirk causes problems it
> can be disabled with the nohpet boot option.
>
> The patch assumes that the BIOS has done the basic setup of HPET, but has
> not published the result in ACPI tables. This is at least true for some
> Asus and Gigabyte motherboards.

This works fine on my DFI Lanparty UT nForce4 CK804 mainboard:

alistair@damocles:~$ dmesg | grep hpet
[   25.677099] hpet0: at MMIO 0xfefff000, IRQs 2, 8, 31
[   25.677102] hpet0: 3 32-bit timers, 25000000 Hz
[   25.678799] Time: hpet clocksource has been installed.

I've been wanting hpets for a while, this patch is extremely useful to me.

Unfortunately your patch does not seem to apply with standard tools, perhaps 
your mailer corrupted it (I just hand applied it).

Thanks Mikko.

-- 
Cheers,
Alistair.

Final year Computer Science undergraduate.
1F2 55 South Clerk Street, Edinburgh, UK.
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