Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932493AbcCCIMM (ORCPT ); Thu, 3 Mar 2016 03:12:12 -0500 Received: from mail-io0-f195.google.com ([209.85.223.195]:35808 "EHLO mail-io0-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757209AbcCCIMJ (ORCPT ); Thu, 3 Mar 2016 03:12:09 -0500 MIME-Version: 1.0 In-Reply-To: <1456965518-13615-2-git-send-email-horms+renesas@verge.net.au> References: <1456965518-13615-1-git-send-email-horms+renesas@verge.net.au> <1456965518-13615-2-git-send-email-horms+renesas@verge.net.au> Date: Thu, 3 Mar 2016 09:12:08 +0100 X-Google-Sender-Auth: Y66ADLosJWdgqRlQJXk4dpGCUgs Message-ID: Subject: Re: [PATCH v2 1/2] phy: rcar-gen2: add fallback binding From: Geert Uytterhoeven To: Simon Horman Cc: Kishon Vijay Abraham I , Yoshihiro Shimoda , Magnus Damm , "linux-kernel@vger.kernel.org" , linux-renesas-soc@vger.kernel.org, "devicetree@vger.kernel.org" Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1268 Lines: 29 On Thu, Mar 3, 2016 at 1:38 AM, Simon Horman wrote: > In the case of Renesas R-Car hardware we know that there are generations of > SoCs, e.g. Gen 2 and Gen 3. But beyond that its not clear what the > relationship between IP blocks might be. For example, I believe that > r8a7790 is older than r8a7791 but that doesn't imply that the latter is a > descendant of the former or vice versa. > > We can, however, by examining the documentation and behaviour of the > hardware at run-time observe that the current driver implementation appears > to be compatible with the IP blocks on SoCs within a given generation. > > For the above reasons and convenience when enabling new SoCs a > per-generation fallback compatibility string scheme being adopted for > drivers for Renesas SoCs. > > Signed-off-by: Simon Horman Acked-by: Geert Uytterhoeven Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds