From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from kirsty.vergenet.net ([202.4.237.240]:35486 "EHLO kirsty.vergenet.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753161AbcGVBrF (ORCPT ); Thu, 21 Jul 2016 21:47:05 -0400 Date: Fri, 22 Jul 2016 10:47:00 +0900 From: Simon Horman To: Dirk Behme Cc: linux-renesas-soc@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Geert Uytterhoeven , Khiem Nguyen , Magnus Damm Subject: Re: [PATCH v3 1/3] arm64: dts: r8a7796: Add Renesas R8A7796 SoC support Message-ID: <20160722014700.GE21943@verge.net.au> References: <20160525004825.GC7292@verge.net.au> <20160526022833.GE18393@verge.net.au> <59e6225a-6dfa-8bde-dd2e-3428d6fedfe2@de.bosch.com> <20160527004256.GD14269@verge.net.au> <20160720235154.GA21407@verge.net.au> <69c8673e-4f9f-9dac-42ab-2557ab62f8b2@de.bosch.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <69c8673e-4f9f-9dac-42ab-2557ab62f8b2@de.bosch.com> Sender: linux-renesas-soc-owner@vger.kernel.org List-ID: Hi Dirk, On Thu, Jul 21, 2016 at 07:20:30AM +0200, Dirk Behme wrote: > Hi Simon, > > On 21.07.2016 01:51, Simon Horman wrote: > >On Wed, Jun 29, 2016 at 10:15:27AM +0200, Dirk Behme wrote: > >>Hi Simon, > > > >... > > > >>Hmm, could you kindly help me to remember what's the recent status of your > >>discussion above regarding a hierarchical structure of the RCar3 device > >>trees? > > > >Hi Dirk, > > > >>From my point of view the most promising avenue at this time is work that > >Geert has been doing to explore making things more flexible by updating the > >DT automatically at run time. He can expand on this but the idea is to add > >per-soc compat strings and otherwise update the DT into a per-SoC version. > >This ought to allow significant portions of the DT to be common between > >SoCs in the same R-Car generation for at lest Gen 2 and Gen 3. > > > There are two topics: > > a) Hierarchical static structure of devices trees and clock definitions for > RCar3 SoCs > b) Detecting of RCar3 SoC type and engineering sample revisions at runtime > > About which topic do you talk here? I think we shouldn't mix them. I was referring to topic a) which I would describe as consolidation of static DT descriptions. However, I believe that the same or a similar approach to DT fixups can also be used for problem b). I agree we should discuss these topics separately. > Best regards > > Dirk > > P.S.: If you like, we could have a chat in #renesas-soc, too :) Sure. In general I am there when I am at my desk and not completely consumed by work at hand.