[PATCH] powerpc: Create "rom" (MTD) device prpmc2800
David Gibson
david at gibson.dropbear.id.au
Wed Jun 13 02:11:52 EDT 2007
On Wed, Jun 13, 2007 at 07:05:31AM +0200, Segher Boessenkool wrote:
> >>> Of course, Ebony has flash which is JEDEC rather than CFI probed, so
> >>> I
> >>> have an interest in a binding for that, too.
> >>
> >> For JEDEC flash, you probably want extra properties
> >> for manufacturing ID and chip ID. Also, you need
> >> to describe the block sizes in some way (on CFI, this
> >> can be probed; on JEDEC, not). Anything else?
> >
> > Hrm. At the moment it appears to work without supplying this
> > information for the Ebony flash... I wonder if there are defaults in
> > the mtd layer or something.
>
> MTD does a lot of heuristic probing. It is pretty good,
> but it would be nice if you could skip that and hand it
> the exact values it needs. Also, this information should
> be in the device tree no matter what, even if Linux
> doesn't use it yet ;-)
I agree. Of course, this means figuring out what the values actually
are for Ebony. I presently have no idea, since the heuristic probing
appears to work without problem.
--
David Gibson | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_
| _way_ _around_!
http://www.ozlabs.org/~dgibson
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