linux-kernel - Re: [PATCH v13 0/6] Cavium MMC driver

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Message-ID: <44e49a3b-ec51-7318-f6c1-911712127ddb@cavium.com>
Date:   Wed, 12 Apr 2017 18:21:32 -0500
From:   "Steven J. Hill" <Steven.Hill@...ium.com>
To:     Aaro Koskinen <aaro.koskinen@....fi>,
        Jan Glauber <jglauber@...ium.com>
Cc:     Ulf Hansson <ulf.hansson@...aro.org>,
        David Daney <david.daney@...ium.com>,
        linux-mmc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v13 0/6] Cavium MMC driver

On 04/12/2017 05:37 PM, Aaro Koskinen wrote:
> 
> Please rather post a new version that also works with OCTEON. I don't
> think a partial driver should be merged; originally this driver was
> working fine with OCTEON so there should be no issue supporting that?!
>
Hey Aaro.

The difference is that Jan added scatter/gather support to take
advantage of the DMA FIFOs on Thunder. The same FIFOs exist on
Octeon parts 73xx, 76xx, 78xx, CNF73xx, and CNF75xx to name a
few. In order to support those, portions of the Octeon platform
code had to be rewritten as well as minor changes in the core
Cavium driver code. I have a fully tested patchset that cleanly
applies on top of Jan's v13 driver. My personal preference is
for the Octeon code to be a separate patch. I will defer that
decision to Jan, David and the MMC maintainers.

Steve