linux-kernel - Re: [PATCH 1/4] dt-bindings: pinctrl: Combine MediaTek MT67xx pinctrl binding docs

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Date:   Wed, 21 Sep 2022 09:11:12 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        Yassine Oudjana <yassine.oudjana@...il.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Sean Wang <sean.wang@...nel.org>,
        Andy Teng <andy.teng@...iatek.com>
Cc:     Yassine Oudjana <y.oudjana@...tonmail.com>,
        linux-mediatek@...ts.infradead.org, linux-gpio@...r.kernel.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/4] dt-bindings: pinctrl: Combine MediaTek MT67xx pinctrl
 binding docs

On 20/09/2022 10:06, AngeloGioacchino Del Regno wrote:
> Il 19/09/22 19:01, Yassine Oudjana ha scritto:
>> From: Yassine Oudjana <y.oudjana@...tonmail.com>
>>
>> Documents for MT6779, MT6795 and MT6797 that currently exist share
>> most properties, and each one has slightly differently worded
>> descriptions for those properties. Combine all three documents into
>> one common document for all MT67xx SoC pin controllers, picking a few
>> parts from each and accounting for differences such as items in reg
>> and reg-names properties. Also document the MT6765 pin controller
>> which currently has a driver but no DT binding documentation. It should
>> be possible to also include bindings for MT8183 and MT8188, but these
>> have some additional properties that might complicate things a bit,
>> so they are left alone for now.
>>
>> Signed-off-by: Yassine Oudjana <y.oudjana@...tonmail.com>
>> ---
>>   .../pinctrl/mediatek,mt6779-pinctrl.yaml      | 207 ------------------
>>   .../pinctrl/mediatek,mt6797-pinctrl.yaml      | 176 ---------------
>>   ...6795.yaml => mediatek,mt67xx-pinctrl.yaml} | 181 +++++++++++----
> 
> Hello Yassine,
> nice cleanup over here!
> 
> There's a catch though: as far as I know, wildcards are not permitted... so you
> should, at this point, merge all of these in mediatek,mt6779-pinctrl.yaml instead.
> 
> Before jumping to that, though... Krzysztof, can you please confirm (or deny)?

Wildcards are not allowed in compatibles. In filename wildcards or
family name could work if they are really going to match the devices. I
have doubts here. 67xx is quite a lot of different devices, so I am not
sure this will cover them all.

I would prefer one name (oldest SoC or lowest number).

Best regards,
Krzysztof