linux-kernel - Re: [PATCH v2 2/4] media: dt-bindings: Document Renesas RZ/G2L CRU block

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Date:   Wed, 21 Sep 2022 20:58:26 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Laurent Pinchart <laurent.pinchart@...asonboard.com>
Cc:     Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Jacopo Mondi <jacopo@...ndi.org>,
        Niklas Söderlund <niklas.soderlund@...natech.se>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Hans Verkuil <hverkuil-cisco@...all.nl>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        linux-media@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-renesas-soc@...r.kernel.org,
        Prabhakar <prabhakar.csengg@...il.com>,
        Biju Das <biju.das.jz@...renesas.com>
Subject: Re: [PATCH v2 2/4] media: dt-bindings: Document Renesas RZ/G2L CRU
 block

On 21/09/2022 19:29, Laurent Pinchart wrote:
>>>>> +  clock-names:
>>>>> +    items:
>>>>> +      - const: vclk
>>>>> +      - const: pclk
>>>>> +      - const: aclk
>>>>
>>>> Drop the "clk" suffixes. Remaining names could be made a bit more readable.
>>>
>>> These names come from the documentation, isn't it better to match the
>>> datasheet ?
>>
>> If datasheet calls it "vclk_really_clk_it_is_clk_clk", it's not the
>> reason to use it. :)
>>
>> The "clk" is redundant even if the hardware engineer thought different.
>>
>> The same for IRQs ("tx" not "txirq"), for dmas ("tx" not "txdma").
> 
> I'd argue that naming clocks "v", "p" and "a" would be less readable and
> more confusing. Is this a new rule ?

Not really, but also it's only a style issue.

Indeed "v" and "p" are not much better... but still "vclk" does not
bring any additional information over "v". It's redundant.

You can also drop entire entry - unless it helps in particular
implementation.

https://lore.kernel.org/all/20220517175958.GA1321687-robh@kernel.org/
https://lore.kernel.org/all/20210815133926.22860-1-biju.das.jz@bp.renesas.com/
https://lore.kernel.org/all/YYFCaHI%2FDASUz+Vu@robh.at.kernel.org/
https://lore.kernel.org/all/20220830182540.GA1797396-robh@kernel.org/

Best regards,
Krzysztof