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

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Message-ID: <ba436dd5-2ea2-b2e0-7056-5bae6b4c7bb4@linaro.org>
Date:   Wed, 21 Sep 2022 17:51:29 +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 14:43, Laurent Pinchart wrote:
> On Thu, Sep 08, 2022 at 01:40:39PM +0200, Krzysztof Kozlowski wrote:
>> On 06/09/2022 01:04, Lad Prabhakar wrote:
>>> Document the CRU block found on Renesas RZ/G2L (and alike) SoCs.
>>>
>>> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
>>> Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>
>>
>> Thank you for your patch. There is something to discuss/improve.
>>
>>> +properties:
>>> +  compatible:
>>> +    items:
>>> +      - enum:
>>> +          - renesas,r9a07g044-cru       # RZ/G2{L,LC}
>>> +          - renesas,r9a07g054-cru       # RZ/V2L
>>> +      - const: renesas,rzg2l-cru
>>> +
>>> +  reg:
>>> +    maxItems: 1
>>> +
>>> +  interrupts:
>>> +    maxItems: 3
>>> +
>>> +  interrupt-names:
>>> +    items:
>>> +      - const: image_conv
>>> +      - const: image_conv_err
>>> +      - const: axi_mst_err
>>> +
>>> +  clocks:
>>> +    items:
>>> +      - description: CRU Main clock
>>> +      - description: CPU Register access clock
>>> +      - description: CRU image transfer clock
>>> +
>>> +  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").

Best regards,
Krzysztof