lkml.org 
[lkml]   [2017]   [Dec]   [17]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH v5 0/4] ARM: ep93xx: ts72xx: Add support for BK3 board
Hi Arnd,

> On Wed, Dec 13, 2017 at 9:26 AM, Alexander Sverdlin
> <alexander.sverdlin@gmail.com> wrote:
> > On Wed Dec 13 08:34:22 2017 Linus Walleij
> > <linus.walleij@linaro.org> wrote:
> >> 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.
>
> I suspect that at several points in the next 5 to 10 years, we will
> remove additional platforms or CPU types, as we tend to do when a
> platform becomes a maintenance burden and is clearly not used by
> anyone.

I suppose that at least the last argument is not the case here :-).

>
> It's hard to predict in advance what triggers the removal, but as the
> number of platforms that are not using DT or ARCH_MULTIPLATFORM
> goes down to a small number, there will be increased interested in
> either removing or converting the remaining ones. This is not an
> immediate danger at the moment, since we still have 14 platforms that
> are not using ARCH_MULTIPLATFORM, and 23 that have remaining
> board files, but you don't want to be the last user of the last
> platform after the other ones are done ;-)

:-)

>
> >> 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.
>
> Plain ARMv4 (and earlier) support in gcc is already marked
> 'deprecated' and will likely be gone in gcc-8 (it's still there as of
> last week). ARMv4T is going to be around for a while, and you can
> even keep building for ARMv4 using "-march=armv4t -marm" when linking
> with 'ld --fix-v4bx'.

I think that we shall start complaining on the gcc-devel mailing list
now.

I would be hard to wake up in 2 years time and realise that we don't
have a modern compiler.

>
> Debian recently did a survey to find out whether there were still
> users on ARMv4 or ARMv4T, and the result was that probably everyone is
> on ARMv5E or ARMv6 for the ARM port (which is separate from the
> ARMHF port that is ARMv7+). See also
> https://lists.debian.org/debian-user/2017/11/msg00379.html
> and let them know quickly if you use Debian stable releases and
> plan to update to Debian 10 (Buster) in the future.
>
> Arnd



Best regards,

Lukasz Majewski

--

DENX Software Engineering GmbH, Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd@denx.de
[unhandled content-type:application/pgp-signature]
\
 
 \ /
  Last update: 2017-12-17 20:41    [W:0.241 / U:0.880 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site