PCI quirk

[Igor Pokrovsky]

On Mon, Aug 18, 2003 at 03:12:17PM +0100, Bruce M Simpson wrote:
> On Mon, Aug 18, 2003 at 02:48:41PM +0200, Igor Pokrovsky wrote:
> > Hello all,
> > 
> > I'd like to add a PCI quirk, which will enable SMBus on boot
> > (it gets disabled by BIOS). What is the best place in kernel
> > to do this? I looked through PCI sources, but haven't found
> > any suitable place for that (not like in USB case).
> 
> This sounds like perhaps you need to add a patch tied to your southbridge.
> 
> Generally the SMBus interface hangs off the southbridge or a power management
> controller. But you haven't told us which one, so any advice we may be able
> to give you is largely academic.
> 
> Do you know the PCI ID of the *function* that implements the SMBus interface
> in your system? If so, grep through the kernel source and find which driver
> is attached to it, if any. If not, pciconf -lv is a good place to start.

Yes, I have all information.

I need to do the similar thing in kernel:
pciconf -w -h pci0:31:0 0xf2 0

Generally according to datashit I have to turn off zero and third bits of 0xf2,
but in fact zeroing whole 2 bytes of 0xf2 works also. And I'm searching for a
right place to add this.

-ip

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