Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760144Ab3GaPHg (ORCPT ); Wed, 31 Jul 2013 11:07:36 -0400 Received: from mail-ea0-f178.google.com ([209.85.215.178]:49757 "EHLO mail-ea0-f178.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756583Ab3GaPHf (ORCPT ); Wed, 31 Jul 2013 11:07:35 -0400 Date: Wed, 31 Jul 2013 17:07:19 +0200 From: Richard Cochran To: Tomasz Figa Cc: mbizon@freebox.fr, 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 , Olof Johansson , Mark Brown , Arend van Spriel , 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?] Message-ID: <20130731150717.GD4904@netboy> References: <20130725175702.GC22291@e106331-lin.cambridge.arm.com> <1441731.8CGUI1tUxh@flatron> <1375267057.20042.52.camel@sakura.staff.proxad.net> <1479410.BSGDrOcRvP@thinkpad> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1479410.BSGDrOcRvP@thinkpad> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1657 Lines: 42 On Wed, Jul 31, 2013 at 12:59:59PM +0200, Tomasz Figa wrote: > On Wednesday 31 of July 2013 12:37:37 Maxime Bizon wrote: > > > > Board files are C code anyone has the skill to edit/understand/refactor. > > Moving to DT and keep them in tree tightly coupled with the kernel > > version just adds another layer of indirection for *no purpose*. +1 That is exactly what I tried to say. > > Linus started the whole thing some years ago by refusing to pull ARM > > tree [1]. Reread his post, what he wants is clearly b). > > > > Going a) does not solve any problem. You are just moving churn to > > somewhere else. We had board files churn, then defconfigs churn, DTS > > files (and associated drivers) will be next. And at this rate, we are headed for another Linus ultimatum, sooner or later. > > DT is self inflicted pain. It has to be for the greater good. > > It has several benefits over board files that I mentioned above, possible > without fully separating them from kernel tree. Every time a criticism is voiced about DT, the DT people stick their fingers in their ears and say, "NAH, NAH, NAH, I CAN'T HEAR YOU!" WRT to DT-as-platform-device, we would rather stick with the C code, please. Just pushing the configuration tables into an external form does not simplify the problem. In fact, it creates new problems by inviting the possibility of a bootloader/DT/kernel mismatch. Thanks, Richard -- 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/