Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754056Ab3G2JT0 (ORCPT ); Mon, 29 Jul 2013 05:19:26 -0400 Received: from mms1.broadcom.com ([216.31.210.17]:4194 "EHLO mms1.broadcom.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752808Ab3G2JTY (ORCPT ); Mon, 29 Jul 2013 05:19:24 -0400 X-Server-Uuid: 06151B78-6688-425E-9DE2-57CB27892261 Message-ID: <51F6338E.8020101@broadcom.com> Date: Mon, 29 Jul 2013 11:19:10 +0200 From: "Arend van Spriel" User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130623 Thunderbird/17.0.7 MIME-Version: 1.0 To: "jonsmirl@gmail.com" cc: "Grant Likely" , "Tomasz Figa" , "Richard Cochran" , "Olof Johansson" , "Mark Brown" , "Mark Rutland" , "devicetree@vger.kernel.org" , "ksummit-2013-discuss@lists.linuxfoundation.org" , "Russell King - ARM Linux" , "Ian Campbell" , "Pawel Moll" , "Stephen Warren" , "Domenico Andreoli" , "rob.herring@calxeda.com" , "linux-kernel@vger.kernel.org" , "Jason Gunthorpe" , "Dave P Martin" , "linux-arm-kernel@lists.infradead.org" Subject: Re: [Ksummit-2013-discuss] DT bindings as ABI [was: Do we have people interested in device tree janitoring / cleanup?] References: <20130725175702.GC22291@e106331-lin.cambridge.arm.com> <2007664.vYsECFSKrV@flatron> <51F39FD8.6080808@broadcom.com> <2460092.aLmjrOVh1g@flatron> <51F3A82E.2000907@broadcom.com> In-Reply-To: X-WSS-ID: 7DE8ED2431W62858550-01-01 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2205 Lines: 47 On 07/27/2013 10:01 PM, jonsmirl@gmail.com wrote: > On Sat, Jul 27, 2013 at 3:45 PM, Grant Likely wrote: >> On Sat, Jul 27, 2013 at 4:59 AM, Arend van Spriel wrote: >>> Let's see how many people go and scream if I say this: Too bad .dts files >>> are not done using XML format as DT bindings could be described using XML >>> Schema. >> >> Draft an example and show us how it would look! :-) There is >> absolutely nothing preventing us from expressing a DT in XML format, >> or even using XSLT to define DT schema while still using our current >> .dts syntax. It would be trivial to do lossless translation between >> .dts syntax and xml. >> >> The problem that I have with XML and XSLT is that it is very verbose >> and not entirely friendly to mere-mortals. However, I'm more than >> willing to be proved wrong on this point. > > I considered this approach a while ago and discarded it. It would work > but it is just too much of a Frankenstein monster. Ah, but he is so cute. At least I do not think it is more monstrous as the bindings files. I just browsed through a couple of arm binding files as I felt challenged to come up with an example. I did not get the impression that there is some kind of template in place to get consitent bindings descriptions. > Much cleaner to modify dtc to take a schema as part of the compilation > process. The schema language itself has no requirement to look like > DTS syntax. Whoever wrote dtc probably has a favorite language that > would be good for writing schemas in. Not sure if I can follow here. I guess you mean the dts compilation, right? There are tools freely available to validate XML files against XSD specification files. As an example libxml2 has support for it. I suspect it is not desired to have a dependency for DTC with an out-of-tree library, but it could be incorporated and have DTC spew the validation results. Regards, Arend -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/