Hello all,
And so our dirty laundry is out... :)
We have a sad history here - back a few parts, we had less descriptors to
describe IO, so we opted to combine several components under the same PCI
header to save resources. So the bottom line is that we have at least three
desirable devices (timers, GPIO pins and the SMBus) that all lay claim to
the same device. So a proper PCI header would be difficult to implement -
either we would have 1 device that registered with three different
subsystems, or we would have three individual devices, the first of which
would get the PCI resources to the ruin of the others.
Well we had the problem with i2c-viapro and vi686a. Best solution was
to fail from the probe function - like this:
/* Always return failure here. This is to allow other drivers to bind
* to this pci device. We don't really want to have control over the
* pci device, we only wanted to read as few register values from it.
*/
return -ENODEV;
release_region:
release_region(vt596_smba, 8);
return error;
}
So this is the solution I came up with, for older parts. For newer parts,
I sat the BIOS guys down in a room with a guy name Bruno, and they agreed
to make a separate header for each component.
This is good ;)
Regards
Rudolf
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