linux-kernel - Re: [PATCH 7/7] spi: spi-fsl-dspi: Add support for TCFQ transfer mode

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Message-ID: <20150130123033.GC26617@finisterre.sirena.org.uk>
Date:	Fri, 30 Jan 2015 13:30:33 +0100
From:	Mark Brown <broonie@...nel.org>
To:	Stefan Agner <stefan@...er.ch>
Cc:	"BhuvanChandra.DV" <bhuvanchandra.dv@...adex.com>,
	Li.Xiubo@...escale.com, mark.rutland@....com, shawn.guo@...aro.org,
	robh+dt@...nel.org, pawel.moll@....com,
	ijc+devicetree@...lion.org.uk, galak@...eaurora.org,
	linux@....linux.org.uk, B44548@...escale.com,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-spi@...r.kernel.org
Subject: Re: [PATCH 7/7] spi: spi-fsl-dspi: Add support for TCFQ transfer mode

On Thu, Jan 29, 2015 at 07:10:31PM +0100, Stefan Agner wrote:

> It would be interesting to know what the authors original motivation
> implementing this feature was. Reading the email of the original
> patchset indicates that there are platforms where only TCF is supported:

> <quote>
> For adopting of different platform, either of them is a way of DSPI
> transfer data.
> </quote>

> However, I don't know which platform that would be. Also, it seems that
> Chao Fu's email is not valid anymore. 

It's not clear to me if the above means that this is due to hardware
differences or due to tuning for the platform.

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