From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-oi0-f49.google.com (mail-oi0-f49.google.com [209.85.218.49]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 91F031A0A5F for ; Wed, 8 Oct 2014 04:11:07 +1100 (EST) Received: by mail-oi0-f49.google.com with SMTP id a3so2612821oib.8 for ; Tue, 07 Oct 2014 10:11:05 -0700 (PDT) Message-ID: <54341EA2.6010806@landley.net> Date: Tue, 07 Oct 2014 12:10:58 -0500 From: Rob Landley MIME-Version: 1.0 To: David Daney , Guenter Roeck Subject: Re: [PATCH 05/44] mfd: as3722: Drop reference to pm_power_off from devicetree bindings References: <1412659726-29957-1-git-send-email-linux@roeck-us.net> <1412659726-29957-6-git-send-email-linux@roeck-us.net> <543412F7.8040909@landley.net> <20141007163131.GE28835@roeck-us.net> <54341BF1.9020001@gmail.com> In-Reply-To: <54341BF1.9020001@gmail.com> Content-Type: text/plain; charset=ISO-8859-1 Cc: linux-m32r-ja@ml.linux-m32r.org, linux-mips@linux-mips.org, linux-efi@vger.kernel.org, linux-ia64@vger.kernel.org, linux-xtensa@linux-xtensa.org, Mark Rutland , devel@driverdev.osuosl.org, linux-s390@vger.kernel.org, lguest@lists.ozlabs.org, linux-c6x-dev@linux-c6x.org, linux-hexagon@vger.kernel.org, linux-sh@vger.kernel.org, linux-acpi@vger.kernel.org, Pawel Moll , xen-devel@lists.xenproject.org, devicetree@vger.kernel.org, user-mode-linux-devel@lists.sourceforge.net, linux-pm@vger.kernel.org, adi-buildroot-devel@lists.sourceforge.net, linux-m68k@lists.linux-m68k.org, linux-am33-list@redhat.com, linux-tegra@vger.kernel.org, openipmi-developer@lists.sourceforge.net, linux-metag@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-parisc@vger.kernel.org, linux-cris-kernel@axis.com, linux-kernel@vger.kernel.org, Rob Herring , linux-alpha@vger.kernel.org, linuxppc-dev@lists.ozlabs.org List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On 10/07/14 11:59, David Daney wrote: > On 10/07/2014 09:31 AM, Guenter Roeck wrote: >> On Tue, Oct 07, 2014 at 11:21:11AM -0500, Rob Landley wrote: >>> On 10/07/14 00:28, Guenter Roeck wrote: >>>> Devicetree bindings are supposed to be operating system independent >>>> and should thus not describe how a specific functionality is >>>> implemented >>>> in Linux. >>> >>> So your argument is that linux/Documentation/devicetree/bindings should >>> not be specific to Linux. Merely hosted in the Linux kernel source >>> repository. >>> >>> Well that's certainly a point of view. >>> >> Not specifically my argument, really, and nothing new either. But, >> yes, I do >> think that devicetree bindings descriptions should not include >> implementation >> details, especially since those may change over time (as is the case >> here). >> > > I fully agree. > > Many device trees come from outside the kernel (i.e. they are supplied > by the system boot environment). Obviously these device trees cannot be > changed at the whim of kernel developers, *and* it is perfectly > reasonable to think that software other than the Linux kernel will run > on this type of system too. > > So yes, it is really true, device trees are not a Linux kernel private > implementation detail, they are really an external ABI that, although > documented in the kernel source tree, cannot be changed in incompatible > ways as time progresses. Ah. Existing thing with backstory among the in-crowd, so I'll assume "git subtree" was previously suggested and you had that discussion already and decided against it. Carry on, Rob