linux-kernel - Re: [RFC PATCH v2 04/14] mtd: nand: define struct nand

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Date:	Wed, 12 Mar 2014 14:18:27 -0600
From:	Warner Losh <imp@...imp.com>
To:	Jason Gunthorpe <jgunthorpe@...idianresearch.com>
Cc:	Boris BREZILLON <b.brezillon.dev@...il.com>,
	Maxime Ripard <maxime.ripard@...e-electrons.com>,
	David Woodhouse <dwmw2@...radead.org>,
	Grant Likely <grant.likely@...aro.org>,
	Brian Norris <computersforpeace@...il.com>,
	Rob Herring <rob.herring@...xeda.com>,
	devicetree@...r.kernel.org, linux-doc@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-mtd@...ts.infradead.org, dev@...ux-sunxi.org
Subject: Re: [RFC PATCH v2 04/14] mtd: nand: define struct nand_timings


On Mar 12, 2014, at 1:07 PM, Jason Gunthorpe <jgunthorpe@...idianresearch.com> wrote:

> On Wed, Mar 12, 2014 at 05:46:53PM +0100, Boris BREZILLON wrote:
>> I'm not a big fan of this name. I think timing structs should not
>> contain onfi in their names, because these timings are also
>> available on non ONFI chips.
> 
> Explicitly defering to the ONFI spec makes it clear what the
> definition of the timing parameter actually is.

This is good, since ONFI is a very public spec.

> If JEDEC has a different model then drivers will need to configure
> their interfaces a little differently.

JEDEC’s spec is just a public as ONFI’s, but in the past at least it has been difficult
to get without purchase.

> So we might end up with a jedec_sdr_timings too :|

And onfi_ddr_timings and jedec_ddr_timings since those timing modes are appearing
on shipping parts.

Warner

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