linux-kernel - Re: [PATCH 0/2] powerpc: Remove support for ppc405/440 Xilinx platforms

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Date:   Sat, 28 Mar 2020 16:06:54 +0100
From:   Christian Lamparter <chunkeey@...il.com>
To:     linuxppc-dev@...ts.ozlabs.org,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Enrico Weigelt <info@...ux.net>,
        Mark Brown <broonie@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>
Cc:     Christophe Leroy <christophe.leroy@....fr>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Arnd Bergmann <arnd@...db.de>,
        Michael Ellerman <mpe@...erman.id.au>,
        linux-kernel@...r.kernel.org,
        "David S. Miller" <davem@...emloft.net>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jonathan Corbet <corbet@....net>,
        Masahiro Yamada <masahiroy@...nel.org>,
        Matt Porter <mporter@...nel.crashing.org>,
        Mauro Carvalho Chehab <mchehab+samsung@...nel.org>,
        Nicholas Piggin <npiggin@...il.com>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Paul Mackerras <paulus@...ba.org>,
        Rob Herring <robh+dt@...nel.org>,
        Sasha Levin <sashal@...nel.org>,
        DTML <devicetree@...r.kernel.org>, ewald_comhaire@...mail.com
Subject: Re: [PATCH 0/2] powerpc: Remove support for ppc405/440 Xilinx platforms

(Sorry for the bounces, yes my smarthost mail setup breaks from time to time
and I had to cut the CC since it complained about the length.)

On Saturday, 28 March 2020 12:17:58 CET Christophe Leroy wrote:
> 
> Le 27/03/2020 à 15:14, Andy Shevchenko a écrit :
>> On Fri, Mar 27, 2020 at 02:22:55PM +0100, Arnd Bergmann wrote:
>>> On Fri, Mar 27, 2020 at 2:15 PM Andy Shevchenko
>>> <andriy.shevchenko@...ux.intel.com> wrote:
>>>> On Fri, Mar 27, 2020 at 03:10:26PM +0200, Andy Shevchenko wrote:
>>>>> On Fri, Mar 27, 2020 at 01:54:33PM +0100, Arnd Bergmann wrote:
>>>>>> On Fri, Mar 27, 2020 at 1:12 PM Michal Simek 
>>>>>> <michal.simek@...inx.com> wrote:
>>>>>> It does raise a follow-up question about ppc40x though: is it time to
>>>>>> retire all of it?
>>>>>
>>>>> Who knows?
>>>>>
>>>>> I have in possession nice WD My Book Live, based on this 
>>>>> architecture, and I won't it gone from modern kernel support.
>>>>> OTOH I understand that amount of real users not too big.
Hm, can't add much to Xilinx ppc405/440 removal patch debate. 

But as for the APM82181 with it's PPC464:

The last time I checked was with 5.6-rc4, it worked fine on the APM82181
(a MyBook Live) device. I've made a "build your own powerpc debian sid"
image thing that takes the latest kernel git and up-to-date packages
from debian ports (they still make powerpc packages!): 
<https://github.com/chunkeey/mbl-debian> .

Though, this is small potatoes. There exists a much more popular project
by Ewald Comhaire (CCed): <https://github.com/ewaldc/My-Book-Live>
that serves the largest userbase:
<https://community.wd.com/c/wd-legacy-products>

I guess we should think about upstreaming the MyBook Live DTS. Problem here
is that we deviated a bit from the canyonlands.dts/bluestone.dts structure
by having a skeleton apm82181.dtsi with most of the SoC defintition and a
wd-mybooklive.dts for the device.

<https://github.com/chunkeey/mbl-debian/blob/master/dts/apm82181.dtsi> 
<https://github.com/chunkeey/mbl-debian/blob/master/dts/wd-mybooklive.dts>

Cheers,
Christian