linux-kernel - Re: [v2] Old platforms: bring out your dead

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Message-ID: <CAK8P3a26Ca_59NiGGGv+CHYZSmkTRESpgV4aGFPhrY=KBa8aBA@mail.gmail.com>
Date:   Fri, 15 Jan 2021 10:26:15 +0100
From:   Arnd Bergmann <arnd@...nel.org>
To:     Wei Xu <xuwei5@...ilicon.com>
Cc:     Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Krzysztof Adamski <krzysztof.adamski@...ia.com>,
        Oleksij Rempel <o.rempel@...gutronix.de>,
        Baruch Siach <baruch@...s.co.il>,
        Russell King - ARM Linux <linux@...linux.org.uk>,
        Daniel Tang <dt.tangr@...il.com>,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>, Jamie Iles <jamie@...ieiles.com>,
        Barry Song <song.bao.hua@...ilicon.com>,
        Viresh Kumar <viresh.kumar@...aro.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Jonas Jensen <jonas.jensen@...il.com>,
        Marc Gonzalez <marc.w.gonzalez@...e.fr>,
        Hartley Sweeten <hsweeten@...ionengravers.com>,
        Lubomir Rintel <lkundrak@...sk>,
        Neil Armstrong <narmstrong@...libre.com>,
        Shawn Guo <shawnguo@...nel.org>, Alex Elder <elder@...aro.org>,
        Alexander Shiyan <shc_work@...l.ru>,
        Koen Vandeputte <koen.vandeputte@...ntric.com>,
        Hans Ulli Kroll <ulli.kroll@...glemail.com>,
        Vladimir Zapolskiy <vz@...ia.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Yoshinori Sato <ysato@...rs.sourceforge.jp>,
        Mark Salter <msalter@...hat.com>,
        Michael Ellerman <mpe@...erman.id.au>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Tony Prisk <linux@...sktech.co.nz>,
        Krzysztof Halasa <khalasa@...p.pl>,
        "Leizhen (ThunderTown)" <thunder.leizhen@...wei.com>
Subject: Re: [v2] Old platforms: bring out your dead

On Fri, Jan 15, 2021 at 8:08 AM Wei Xu <xuwei5@...ilicon.com> wrote:
> On 2021/1/14 0:14, Arnd Bergmann wrote:
> > On Fri, Jan 8, 2021 at 11:55 PM Arnd Bergmann <arnd@...nel.org> wrote:
> > * mmp -- added in 2009, DT support is active, but board files might go
> > * cns3xxx -- added in 2010, last fixed in 2019, probably no users left
> > * hisi (hip01/hip05) -- servers added in 2013, replaced with arm64 in 2016
>
> I think it is OK to drop the support of the hip01(arm32) and hip05(arm64).
> Could you also help to drop the support of the hip04(arm32) which I think nobody use as well?

Thank you for your reply! I actually meant to write hip04 instead of hip05,
so I was only asking about the two 32-bit targets. I would expect that
hip05 still has a few users, but wouldn't mind removing that as well if you
are sure there are none.

Since Zhen Lei is starting to upstream Kunpeng506 and Kunpeng509
support, can you clarify how much reuse of IP blocks there is between
hip04 and those? In particular, hip04 has custom code for (at least)
platmcpm, clk, irqchip, ethernet, and hw_rng, probably more as those
were only the ones I see on a quick grep.

If we remove hip04, should we remove all these drivers right away,
or keep some of them around?

      Arnd