From mboxrd@z Thu Jan  1 00:00:00 1970
From: Brian Norris <computersforpeace-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Subject: Re: [PATCH 3/3] MTD: m25p80: Add option to limit SPI
 transfer size.
Date: Wed, 20 May 2015 16:27:59 -0700
Message-ID: <20150520232759.GW11598@ld-irv-0074>
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To: Julian Calaby <julian.calaby-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Cc: Michal Suchanek <hramrach-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>, linux-sunxi <linux-sunxi-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org>, Rob Herring <robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>, Pawel Moll <pawel.moll-5wv7dgnIgG8@public.gmane.org>, Mark Rutland <mark.rutland-5wv7dgnIgG8@public.gmane.org>, Ian Campbell <ijc+devicetree-KcIKpvwj1kUDXYZnReoRVg@public.gmane.org>, Kumar Gala <galak-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>, David Woodhouse <dwmw2-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>, Marek Vasut <marex-ynQEQJNshbs@public.gmane.org>, Huang Shijie <b32955-KZfg59tc24xl57MIdRCFDg@public.gmane.org>, =?utf-8?B?UmFmYcWCIE1pxYJlY2tp?= <zajec5-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>, Ben Hutchings <ben-/+tVBieCtBitmTQ+vhA3Yw@public.gmane.org>, Alison Chaiken <alison_chaiken-nmGgyN9QBj3QT0dZR+AlfA@public.gmane.org>, Mika Westerberg <mika.westerberg-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>, Bean Huo =?utf-8?B?6ZyN5paM5paMIChiZWFuaHVvKQ==?= <beanhuo-AL4WhLSQfzjQT0dZR+AlfA@public.gmane.org>, "grmoore-EIB2kfCEclfQT0dZR+AlfA@public.gmane.org" <grmoore-EIB2kfCEclfQT0dZR+AlfA@public.gmane.org>, devicetree <devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>, "linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org" <linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>, linux-mtd-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org
List-Id: devicetree@vger.kernel.org

On Fri, May 01, 2015 at 12:58:52AM +1000, Julian Calaby wrote:
> On Thu, Apr 30, 2015 at 11:46 PM, Michal Suchanek <hramrach-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> > My SPI driver does not support DMA so sizes larger than 64 bytes return
> > an error. Add an option to limit transfer size so m25p80 can be used
> > with reduced speed with such controller.
> 
> I suspect that this will be rejected as the maximum transfer size is a
> property of the SPI controller, not the device and should be exported
> to the device driver from the controller, not specified in the
> device's binding.

Absolutely correct. This does not belong in the device tree.

Brian