From mboxrd@z Thu Jan 1 00:00:00 1970 From: Arnd Bergmann Subject: Re: [PATCH V6 1/2] of: Add generic device tree DMA helpers Date: Tue, 18 Sep 2012 12:50:05 +0000 Message-ID: <201209181250.05647.arnd@arndb.de> References: <1347662517-4210-1-git-send-email-jon-hunter@ti.com> <201209172042.11860.arnd@arndb.de> <20120917230615.GA26502@codeaurora.org> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20120917230615.GA26502-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: devicetree-discuss-bounces+gldd-devicetree-discuss=m.gmane.org-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org Sender: "devicetree-discuss" To: David Brown Cc: Stephen Warren , Vinod Koul , device-tree , Rob Herring , Dan Williams , Russell King - ARM Linux , linux-omap , linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org List-Id: linux-omap@vger.kernel.org On Monday 17 September 2012, David Brown wrote: > There is also a lot of similarity between the mmci hardware and the > msm_sdcc hardware. Enough so, that it is probably better for us to > make the mmci driver work with our hardware, rather than trying to > keep msm_sdcc going. > > There is also an MSM nand device that appears to have not made it in. > It is heavily dependent on the weird features of the DMA hardware. I > don't have any current plans to support this device, since most boards > using MSMs these days are using mmc/sd instead of bare NAND. > > Our DMA hardware is really weird, but should be a bit reasonable. It > is also being gradually replaced in newer chips with a different DMA > framework. > > As far as I'm concerned, I consider making our DMA driver(s) use the > DMA engine API to be part of getting these platforms working with DT. > > It is planned, but there are quite a few things that need to be > tackled first. Ok, thanks for the information. Arnd From mboxrd@z Thu Jan 1 00:00:00 1970 From: arnd@arndb.de (Arnd Bergmann) Date: Tue, 18 Sep 2012 12:50:05 +0000 Subject: [PATCH V6 1/2] of: Add generic device tree DMA helpers In-Reply-To: <20120917230615.GA26502@codeaurora.org> References: <1347662517-4210-1-git-send-email-jon-hunter@ti.com> <201209172042.11860.arnd@arndb.de> <20120917230615.GA26502@codeaurora.org> Message-ID: <201209181250.05647.arnd@arndb.de> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Monday 17 September 2012, David Brown wrote: > There is also a lot of similarity between the mmci hardware and the > msm_sdcc hardware. Enough so, that it is probably better for us to > make the mmci driver work with our hardware, rather than trying to > keep msm_sdcc going. > > There is also an MSM nand device that appears to have not made it in. > It is heavily dependent on the weird features of the DMA hardware. I > don't have any current plans to support this device, since most boards > using MSMs these days are using mmc/sd instead of bare NAND. > > Our DMA hardware is really weird, but should be a bit reasonable. It > is also being gradually replaced in newer chips with a different DMA > framework. > > As far as I'm concerned, I consider making our DMA driver(s) use the > DMA engine API to be part of getting these platforms working with DT. > > It is planned, but there are quite a few things that need to be > tackled first. Ok, thanks for the information. Arnd