From mboxrd@z Thu Jan 1 00:00:00 1970 From: Rob Herring Subject: Re: [PATCH v2 3/8] dt-bindings: sdhci-omap: Add properties for using external dma Date: Mon, 18 Feb 2019 14:12:40 -0600 Message-ID: <20190218201240.GA14067@bogus> References: <20190215192033.24203-1-faiz_abbas@ti.com> <20190215192033.24203-4-faiz_abbas@ti.com> <20190215200718.GB15711@atomide.com> <2aa0f7e4-c880-ee88-2e88-dc2c3187f0c9@ti.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <2aa0f7e4-c880-ee88-2e88-dc2c3187f0c9@ti.com> Sender: linux-kernel-owner@vger.kernel.org To: Faiz Abbas Cc: Tony Lindgren , linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-mmc@vger.kernel.org, linux-omap@vger.kernel.org, ulf.hansson@linaro.org, mark.rutland@arm.com, adrian.hunter@intel.com, kishon@ti.com, zhang.chunyan@linaro.org List-Id: devicetree@vger.kernel.org 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 [190215 19:18]: > >> From: Chunyan Zhang > >> > >> 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