Re: [PATCH] MTD jedec_probe: Recognize Atmel AT49BV6416

From: Haavard Skinnemoen
Date: Fri Aug 04 2006 - 06:26:18 EST

On Fri, 04 Aug 2006 17:06:19 +0800
David Woodhouse <dwmw2@xxxxxxxxxxxxx> wrote:

> On Fri, 2006-08-04 at 10:52 +0200, Haavard Skinnemoen wrote:
> > It is actually a CFI chip. But I couldn't figure out how to install
> > the fixup in the other patch in the CFI code. The AT49BV6416 chip
> > identifies itself as using the AMD command set, so the fixup must be
> > installed based on the jedec ID...
> Er, note that the _correct_ answer is to advertise the availability of
> the lock functionality in the CFI 'extended query' information. Did
> the hardware designer screw that up? looks like the information is there, but the PRI page looks
different than the one defined by the kernel. Which could make sense,
depending on whether "vendor specific" refers to the JEDEC vendor ID of
the device or the command set ID.

I'll try to ask someone from the Atmel flash group about this.

Anyway, I could of course add a fixup based on manufacturer ID and
convert the PRI information into something the kernel understands.
Would that be a better idea?

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