From mboxrd@z Thu Jan  1 00:00:00 1970
From: Faiz Abbas <faiz_abbas@ti.com>
Subject: Re: [PATCH v2 3/8] dt-bindings: sdhci-omap: Add properties for using
 external dma
Date: Mon, 18 Feb 2019 19:11:32 +0530
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 <20190215200718.GB15711@atomide.com>
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To: Tony Lindgren <tony@atomide.com>
Cc: linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-mmc@vger.kernel.org, linux-omap@vger.kernel.org, ulf.hansson@linaro.org, robh+dt@kernel.org, mark.rutland@arm.com, adrian.hunter@intel.com, kishon@ti.com, zhang.chunyan@linaro.org
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Hi Tony,

On 16/02/19 1:37 AM, Tony Lindgren wrote:
> * Faiz Abbas <faiz_abbas@ti.com> [190215 19:18]:
>> From: Chunyan Zhang <zhang.chunyan@linaro.org>
>>
>> sdhci-omap can support both external dma controller via dmaengine
>> framework as well as ADMA which standard SD host controller
>> provides.
> 
> Care to describe here also how to configure things for ADMA and
> instead of DMA? Just leave out dmas property?
> 

That's correct. If dmas property is populated, then use external DMA.
Otherwise use ADMA/SDMA depending on what you read from the CAPS register.

Thanks,
Faiz