Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755237AbdLTMdG (ORCPT ); Wed, 20 Dec 2017 07:33:06 -0500 Received: from mail-io0-f194.google.com ([209.85.223.194]:33415 "EHLO mail-io0-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755145AbdLTMdB (ORCPT ); Wed, 20 Dec 2017 07:33:01 -0500 X-Google-Smtp-Source: ACJfBou+8Tnx03kSzzhGPQ3vdPxcyJvtCWfi/QMbwNYyf24Kdq+vvJMPM0KkVEKXzS4wwGSgdBWLsT9vIja4ZvNVYds= MIME-Version: 1.0 In-Reply-To: <20171213095257.5cf424fb@jawa> References: <20171116232239.16823-1-lukma@denx.de> <20171211233625.5689-1-lukma@denx.de> <1513153607.2439.2.camel@Nokia-N900> <20171213095257.5cf424fb@jawa> From: Linus Walleij Date: Wed, 20 Dec 2017 13:33:00 +0100 Message-ID: Subject: Re: [PATCH v5 0/4] ARM: ep93xx: ts72xx: Add support for BK3 board To: Lukasz Majewski Cc: Alexander Sverdlin , Arnd Bergmann , Arnd Bergmann , Hartley Sweeten , Russell King , Linux ARM , "linux-kernel@vger.kernel.org" , Olof Johansson 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: 1785 Lines: 49 On Wed, Dec 13, 2017 at 9:52 AM, Lukasz Majewski wrote: >> On Wed Dec 13 08:34:22 2017 Linus Walleij >> wrote: >> > On Tue, Dec 12, 2017 at 12:36 AM, Lukasz Majewski >> > wrote: Out of curiosity: Liebherr is obviously doing heavy-duty >> > industrial control systems. Likewise Hartley is doing similar >> > business over at Vision Engravings. >> > >> > Is the situation such that there is a whole bunch of industrial >> > systems out there, in active use and needing future upgrades, >> > that use the EP93xx? >> >> That's definitely the case. I'm as well aware of several thousands of >> industrial devices which are expected to run 24/7 for the next 5 >> years at least. And they are updated from time to time. > > I can agree with this statement. OK I'm coloring this platform with a highlight for ARM32 maintenance. >> > Arnd has been nudging me to do DT conversion for EP93xx >> > so if there are many active industrial users of these >> > I should prioritize it, because these things have 20+ years >> > support cycles. >> >> I'm not sure how important or necessary at all is to change anything >> in these legacy platforms. > > +1 That is an understandable conservative stance. There is a fine line between "it works, don't touch it" and "modernize the ARM32 ecosystem". There is a point where supporting old board files will stand in the way and cost a lot in maintenance (like moving drivers our of arch/arm, or modernizing misc subsystems). Then moving the platform over to device tree should be preferred. > I'm using OE to build toolchain (SDK). I can confirm that gcc 7.2 works > with it. > > And yes, armv4 support shall be preserved in GCC .... Yes that is the same toochain I use. Yours, Linus Walleij