linux-kernel - Re: [PATCH 01/10] dt: bindings: clock: add mtmips SoCs clock device tree binding documentation

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Date:   Tue, 21 Mar 2023 08:27:13 +0100
From:   Sergio Paracuellos <sergio.paracuellos@...il.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc:     Arınç ÜNAL <arinc.unal@...nc9.com>,
        linux-clk@...r.kernel.org, linux-mips@...r.kernel.org,
        tsbogend@...ha.franken.de, john@...ozen.org,
        linux-kernel@...r.kernel.org, p.zabel@...gutronix.de,
        mturquette@...libre.com, sboyd@...nel.org, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, matthias.bgg@...il.com,
        devicetree@...r.kernel.org
Subject: Re: [PATCH 01/10] dt: bindings: clock: add mtmips SoCs clock device
 tree binding documentation

On Tue, Mar 21, 2023 at 8:20 AM Krzysztof Kozlowski
<krzysztof.kozlowski@...aro.org> wrote:
>
> On 21/03/2023 07:56, Sergio Paracuellos wrote:
> > On Tue, Mar 21, 2023 at 7:43 AM Krzysztof Kozlowski
> > <krzysztof.kozlowski@...aro.org> wrote:
> >>
> >> On 21/03/2023 07:38, Arınç ÜNAL wrote:
> >>>>>>
> >>>>>> Ah, but indeed there are newer Mediatek MT6xxx and MT8xxx SoCs which are
> >>>>>> ARM, so mediatek,mtmips-sysc would work.
> >>>>>
> >>>>> I can use 'mediatek,mtmips-sysc.yaml' as the name but compatibles will
> >>>>> start with ralink. There are already some existent compatibles for
> >>>>> mt762x already having ralink as prefix, so to be coherent ralink
> >>>>> should be maintained as prefix.
> >>>>
> >>>> The compatibles I mentioned start already with mediatek, so why do you
> >>>> want to introduce incorrect vendor name for these?
> >>>
> >>> Can you point out where these compatible strings for mt7620 and mt7628 are?
> >>
> >> git grep
> >
> > Not for *-sysc nodes. The only current one in use (from git grep):
>
> We do not talk about sysc nodes at all. They do not matter.

Ah, ok. That reason was from where all of my arguments were coming
from. But if it does not matter, I don't have problems using the
'mediatek' prefix in the new stuff.

>
> >
> > arch/mips/ralink/mt7620.c:      rt_sysc_membase =
> > plat_of_remap_node("ralink,mt7620a-sysc");
> >
> > That's the reason I also used prefix ralink for the rest.
> >
> > Does it make sense to you to maintain this one as ralink,mt7620a-sysc
> > and add the following with mediatek prefix?
> >
> > mediatek,mt7620-sysc
> > mediatek,mt7628-sysc
> > mediatek,mt7688-sysc
> >
> > That would be weird IMHO.
>
> What exactly would be weird? Did you read the discussion about vendor
> prefix from Arinc? mt7620 is not a Ralink product, so what would be
> weird is to use "ralink" vendor prefix. This was never a Ralink. However
> since there are compatibles using "ralink" for non-ralink devices, we
> agreed not to change them.
>
> These though use at least in one place mediatek, so the above argument
> does not apply. (and before you say "but they also use ralink and
> mediatek", it does not matter - it is already inconsistent thus we can
> choose whatever we want and ralink is not correct).

Ok, I see your point now. Thanks for clarification. I will maintain
'ralink,mt7620a-sysc' since it already exists and change the new stuff
to use mediatek as prefix. These are 'mediatek,mt7620-sysc',
'mediatek,mt7628-sysc' and 'mediatek,mt7688-sysc'. Doing so it will
properly match the 'mediatek,mtmips-sysc.yaml' file name.

>
>
> Best regards,
> Krzysztof
>

Thanks,
    Sergio Paracuellos