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

Rob Herring
2019-02-18T20:12:40Z

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@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.

Then the properties should be optional.

Rob