From mboxrd@z Thu Jan 1 00:00:00 1970 From: Will Deacon Subject: Re: [PATCH] documentation: iommu: add description of ARM System MMU binding Date: Mon, 8 Apr 2013 09:59:46 +0100 Message-ID: <20130408085946.GA17208@mudshark.cambridge.arm.com> References: <1365094259-24847-1-git-send-email-will.deacon@arm.com> <515EFF1A.5030705@gmail.com> <20130405165745.GB17151@mudshark.cambridge.arm.com> <515F1716.70309@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Content-Disposition: inline In-Reply-To: <515F1716.70309-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org Errors-To: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org To: Rob Herring Cc: Andreas Herrmann , "devicetree-discuss-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org" , "iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org" , "linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org" List-Id: devicetree@vger.kernel.org On Fri, Apr 05, 2013 at 07:25:26PM +0100, Rob Herring wrote: > On 04/05/2013 11:57 AM, Will Deacon wrote: > > Hi Rob, > > > > On Fri, Apr 05, 2013 at 05:43:06PM +0100, Rob Herring wrote: > > [...] > > >>> +- compatible : Should be one of "arm,smmu-v1" or "arm,smmu-v2" > >>> + depending on the version of the architecture > >>> + implemented. > >> > >> We can keep these, but we should have specific models like arm,smmu-400, > >> etc. as well. > > > > Ok, if distinctions need to be between MMU-400 and a v1 implementation, then > > we can add those strings later. > > No, you want to have specific values in the dtb's up front. If there is > something needed later in the kernel, you don't want to require a dtb > update then. Adding future parts later is fine, but we already know what > blocks we have. Yes, you're right. I'll add those for v2. Cheers, Will