From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mho-01-ewr.mailhop.org (mho-03-ewr.mailhop.org [204.13.248.66]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id 33FFC2C0087 for ; Sun, 21 Oct 2012 13:46:34 +1100 (EST) Date: Sat, 20 Oct 2012 21:52:34 -0400 From: Jason Cooper To: Benjamin Herrenschmidt Subject: Re: [PATCH v3 0/7] mv643xx.c: Add basic device tree support. Message-ID: <20121021015234.GE25828@titan.lakedaemon.net> References: <1344350092-24050-1-git-send-email-ian.molton@codethink.co.uk> <5028D040.60604@codethink.co.uk> <502D201E.9030304@codethink.co.uk> <201209101422.13875.arnd@arndb.de> <1347343411.2603.42.camel@pasglop> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii In-Reply-To: <1347343411.2603.42.camel@pasglop> Cc: thomas.petazzoni@free-electrons.com, andrew@lunn.ch, Arnd Bergmann , netdev@vger.kernel.org, devicetree-discuss@lists.ozlabs.org, ben.dooks@codethink.co.uk, Ian Molton , dale@farnsworth.org, linuxppc-dev@lists.ozlabs.org, David Miller , linux-arm-kernel@lists.infradead.org List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Pong. ;-) On Tue, Sep 11, 2012 at 04:03:31PM +1000, Benjamin Herrenschmidt wrote: > On Mon, 2012-09-10 at 14:22 +0000, Arnd Bergmann wrote: > > Following up on the old discussion, I talked briefly about this > > issue with BenH at the kernel summit. The outcome basically is that > > it's a bit sad to have incompatible bindings, but it's not the end > > of the world,and it's more important to do it right this time. > > > > Just make sure that you use different values for the 'compatible' > > strings and then do what you need to get the ARM hardware working. > > > > Ideally, the new binding should be written in a way that powerpc > > machines can use the same one, but the existing ones all use > > an version of Open Firmware that is not going to get updated > > and it's also not too likely that we are going to see new > > powerpc machines based on this chip. > > Right, mostly these machines where the Pegasos. Those came with a fairly > busted variant of Open Firmware which generated a pretty gross > device-tree. > > For some reason, the manufacturer of those things was never willing to > fix anything in their firmware (despite the distributor providing > patches etc...), seemingly on the assumption that whatever they were > doing was perfect and operating system people like us didn't matter one > little bit :-) > > So I don't care much about it. It would be nice to keep them working > since people in the community still have them but if it goes through > some "compat" code that detects old/broken device-trees and eventually > disappears when we finally drop support, then so be it. Ian, What is the status of this work? thx, Jason.