From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Jon Smirl" Subject: Re: [RFC PATCH 0/4] Describe SPI devices in the OF device tree and add mpc5200-spi driver Date: Fri, 16 May 2008 17:25:28 -0400 Message-ID: <9e4733910805161425i2d6cc034y3377af053a4198b5@mail.gmail.com> References: <20080516193054.28030.35126.stgit@trillian.secretlab.ca> <9e4733910805161327u4c42fd1dg5b09319d89db447c@mail.gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: fabrizio.garetto-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org, linuxppc-dev-mnsaURCQ41sdnm+yROfE0A@public.gmane.org, dbrownell-Rn4VEauK+AKRv+LV9MX5uipxlwaOVQ5f@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, spi-devel-general-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org To: "Grant Likely" Return-path: In-Reply-To: Content-Disposition: inline List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: spi-devel-general-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Errors-To: spi-devel-general-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Id: linux-spi.vger.kernel.org On 5/16/08, Grant Likely wrote: > On Fri, May 16, 2008 at 2:27 PM, Jon Smirl wrote: > > On 5/16/08, Grant Likely wrote: > >> This series is a set of changes to allow the slaves on an SPI bus to be > >> described in the OF device tree (useful in arch/powerpc) and adds a driver > >> that uses it (the Freescale MPC5200 SoC's SPI device). > > > > Right now we have SPI hooked up to PSC3. Hardware engineer is gone but > > I'll see if I can get him to alter things to use the SPI controller. I > > have an old mail from him where he thinks the Phytec board is missing > > a signal needed to use the SPI controller. > > > While I'd appreciate the testing, I suspect that you really don't want > to do that. The dedicated SPI controller isn't very good. It only > does a byte at a time and so is rather slow. A PSC is SPI mode should > be better (but I haven't tried it personally it yet). What is the device tree node for PSC3 supposed to look like when it has both serial and spi enabled? -- Jon Smirl jonsmirl-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/