linux-kernel - Re: [PATCH v2 3/8] dt-bindings: sdhci-omap: Add properties for using external dma

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Date:   Tue, 19 Feb 2019 19:02:40 +0530
From:   Faiz Abbas <faiz_abbas@...com>
To:     Rob Herring <robh@...nel.org>
CC:     Tony Lindgren <tony@...mide.com>, <linux-kernel@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-mmc@...r.kernel.org>,
        <linux-omap@...r.kernel.org>, <ulf.hansson@...aro.org>,
        <mark.rutland@....com>, <adrian.hunter@...el.com>, <kishon@...com>,
        <zhang.chunyan@...aro.org>
Subject: Re: [PATCH v2 3/8] dt-bindings: sdhci-omap: Add properties for using
 external dma

Hi Rob,

On 19/02/19 1:42 AM, Rob Herring wrote:
> On Mon, Feb 18, 2019 at 07:11:32PM +0530, Faiz Abbas wrote:
>> Hi Tony,
>>
>> On 16/02/19 1:37 AM, Tony Lindgren wrote:
>>> * Faiz Abbas <faiz_abbas@...com> [190215 19:18]:
>>>> From: Chunyan Zhang <zhang.chunyan@...aro.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.
> 
> Then the properties should be optional.
> 

Will move it to optional in v3.

Thanks,
Faiz