Re: Q: Probing for devices > buswidth???

Eric W. Biederman
2001-10-09T06:41:04Z

David Woodhouse <dwmw2@infradead.org> writes:

> ebiederman@lnxi.com said:
> > Trying to understand some anomolous results I discovered that
> > gen_probe_newchip is looking for: 16 bit devices on an 8 bit bus. byte
> > interleaved 16 bit devices on a 16 bit bus. And some really bizare
> > things for a 32 bit bus.
>
> > Is there any good reason for doing it that way?
>
> What it's probing for is a 16-bit device in 8-bit mode. This is _different_
> to an 8-bit device :)

Just so I understand. There are chips with a 16-bit interface that
you can put in a crippled mode such that they pretend use only an 8
bit bus. But the id logic is the same as when the are on a 16-bit
bus?

I'm just trying to comprehend this weird situation.

Eric