From mboxrd@z Thu Jan 1 00:00:00 1970 From: Guenter Roeck Subject: Re: [Ksummit-2013-discuss] ARM topic: Is DT on ARM the solution, or is there something better? Date: Tue, 22 Oct 2013 12:16:00 -0700 Message-ID: <20131022191600.GA28630@roeck-us.net> References: <52644A9E.3060007@wwwdotorg.org> <20131020220839.GT2443@sirena.org.uk> <5264576F.6050307@wwwdotorg.org> <52658EBC.8020800@wwwdotorg.org> <20131022093923.GC15640@ulmo.nvidia.com> <20131022150426.GF29341@beef> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: Sender: devicetree-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Peter Maydell Cc: Nicolas Pitre , "devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org" , "ksummit-2013-discuss-cunTk1MwBs98uUxBSJOaYoYkZiVZrdSR2LY78lusg7I@public.gmane.org" , Thierry Reding , Matt Porter , "linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org" List-Id: devicetree@vger.kernel.org On Tue, Oct 22, 2013 at 07:21:46PM +0100, Peter Maydell wrote: > On 22 October 2013 18:42, Nicolas Pitre wrote: > > Having "stable" DT bindings is just a dream. Experience so far is > > showing that this is neither practical nor realistic. > > > > The unstructured free-for-all approach isn't good either. Some > > compromise between the two extremes needs to be found. > > While I entirely agree that the concept of DT bindings as stable > ABI is a complete pipe dream, it would be nice if we could have > some suitably restricted parts of it that are defined as stable, > for the benefit of tools like kvmtool and QEMU which construct > device tree blobs from scratch to describe the virtual machine > environment. (That means roughly CPUs, RAM, virtio-mmio > devices and a UART at least.) > > As the person who has to maintain the device-tree-writing > code for ARM QEMU, I'd actually trust a carefully limited > guarantee of ABI stability for specific bindings much more > than I do the current airy promises that everything is stable. > Agreed. I like the idea of Documentation/ABI, though of course it would help if its contents would move from testing/ to stable/ at some point ;-). Guenter -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html