From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sascha Hauer Subject: Re: i.MX SPI driver Date: Thu, 18 Jun 2009 09:01:24 +0200 Message-ID: <20090618070124.GU31396@pengutronix.de> References: <1245235220-23816-1-git-send-email-s.hauer@pengutronix.de> <4A39E2BF.8060104@swapp-eng.it> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: VISCOUNT - Larcher Alessandro , VISCOUNT - Zinato Carlo , VISCOUNT - Gabrielli Sandro , David Brownell , spi-devel-general-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org, linux-arm-kernel-xIg/pKzrS19vn6HldHNs0ANdhmdF6hFW@public.gmane.org To: Andrea Paterniani Return-path: Content-Disposition: inline In-Reply-To: <4A39E2BF.8060104-03BXCEkGbFHYGGNLXY5/rw@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: spi-devel-general-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Id: linux-spi.vger.kernel.org Hi Andrea, On Thu, Jun 18, 2009 at 08:46:23AM +0200, Andrea Paterniani wrote: > Hi Sascha, > > Sorry for late replay! > The current driver support DMA transfers. > Surely for our design this feature is mandatory since we need to sustain > heavy SPI traffic. > I suggest to not remove the driver even if it only supports iMX1 device > and not the entire family. > Is it possible to have both current and new drivers? I really wouldn't suggest that. The current driver does not work anymore anyway since arch-imx is gone and the DMA API has changed on arch-mx1. We have to do some work anyway, so I suggest to put the effort into DMA support for the new driver. Since it's a bitbang driver it shouldn't be hard. Sascha -- Pengutronix e.K. | | Industrial Linux Solutions | http://www.pengutronix.de/ | Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | ------------------------------------------------------------------------------ Crystal Reports - New Free Runtime and 30 Day Trial Check out the new simplified licensing option that enables unlimited royalty-free distribution of the report engine for externally facing server and web deployment. http://p.sf.net/sfu/businessobjects