linux-kernel - Re: [PATCH v5 0/4] ARM: ep93xx: ts72xx: Add support for BK3 board

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Message-ID: <20171213095257.5cf424fb@jawa>
Date:   Wed, 13 Dec 2017 09:52:57 +0100
From:   Lukasz Majewski <lukma@...x.de>
To:     Alexander Sverdlin <alexander.sverdlin@...il.com>
Cc:     Linus Walleij <linus.walleij@...aro.org>,
        Arnd Bergmann <arnd@...db.de>,
        Arnd Bergmann <arndbergmann@...il.com>,
        Hartley Sweeten <hsweeten@...ionengravers.com>,
        Russell King <linux@...linux.org.uk>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        linux-kernel@...r.kernel.org, Olof Johansson <olof@...om.net>
Subject: Re: [PATCH v5 0/4] ARM: ep93xx: ts72xx: Add support for BK3 board

Hi Alexander, Linus

> Hello Linus!
> 
> On Wed Dec 13 08:34:22 2017 Linus Walleij <linus.walleij@...aro.org>
> wrote:
> > On Tue, Dec 12, 2017 at 12:36 AM, Lukasz Majewski <lukma@...x.de>
> > 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. 

> 
> > 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

> 
> > We also need to think about upholding support in GCC for
> > ARMv4(t) for the foreseeable future if there is a big web of
> > random deeply embedded systems out there that will need
> > updates.  
> 
> But we should definitely preserve at least what we have.

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 ....

> 
> --
> Alexander.
> 



Best regards,

Lukasz Majewski

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