netdev - Re: [PATCH v4 46/47] net: ethernet: freescale: make UCC

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Message-ID: <29b45e76-f384-fe16-0891-cc51cfecefd4@rasmusvillemoes.dk>
Date:   Fri, 15 Nov 2019 08:54:24 +0100
From:   Rasmus Villemoes <linux@...musvillemoes.dk>
To:     Li Yang <leoyang.li@....com>, Timur Tabi <timur@...nel.org>
Cc:     Qiang Zhao <qiang.zhao@....com>,
        Christophe Leroy <christophe.leroy@....fr>,
        linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        lkml <linux-kernel@...r.kernel.org>,
        Scott Wood <oss@...error.net>, netdev <netdev@...r.kernel.org>
Subject: Re: [PATCH v4 46/47] net: ethernet: freescale: make UCC_GETH
 explicitly depend on PPC32

On 15/11/2019 06.44, Li Yang wrote:
> On Thu, Nov 14, 2019 at 10:37 PM Timur Tabi <timur@...nel.org> wrote:
>>
>> On Fri, Nov 8, 2019 at 7:04 AM Rasmus Villemoes
>> <linux@...musvillemoes.dk> wrote:
>>>
>>> Currently, QUICC_ENGINE depends on PPC32, so this in itself does not
>>> change anything. In order to allow removing the PPC32 dependency from
>>> QUICC_ENGINE and avoid allmodconfig build failures, add this explicit
>>> dependency.
>>
>> Can you add an explanation why we don't want ucc_geth on non-PowerPC platforms?

It's not that "we" don't want to allow building this on non-PPC per se,
but making it build requires some surgery that I think should be done by
whoever might eventually want it. So _my_ reason for lowering this
dependency from QUICC_ENGINE to UCC_GETH is exactly what it says above.

> I think it is because the QE Ethernet was never integrated in any
> non-PowerPC SoC and most likely will not be in the future. 

Well, that kind of thing is impossible to know for outsiders like me.
Maybe one can amend the commit log with that info:

"Also, the QE Ethernet has never been integrated on any non-PowerPC SoC
and most likely will not be in the future."

Rasmus