linux-kernel - Re: Aw: Re: Re: [PATCH v5 1/5] dt-bindings: ata: ahci-platform: Convert DT bindings to yaml

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Date:   Sun, 6 Mar 2022 12:15:39 +0100
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>
To:     Frank Wunderlich <frank-w@...lic-files.de>
Cc:     Frank Wunderlich <linux@...web.de>, devicetree@...r.kernel.org,
        Damien Le Moal <damien.lemoal@...nsource.wdc.com>,
        Rob Herring <robh+dt@...nel.org>, Andrew Lunn <andrew@...n.ch>,
        Gregory Clement <gregory.clement@...tlin.com>,
        Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
        Russell King <linux@...linux.org.uk>,
        Heiko Stuebner <heiko@...ech.de>,
        Peter Geis <pgwipeout@...il.com>,
        Michael Riesch <michael.riesch@...fvision.net>,
        Hans de Goede <hdegoede@...hat.com>,
        Jens Axboe <axboe@...nel.dk>, linux-ide@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-rockchip@...ts.infradead.org
Subject: Re: Aw: Re: Re: [PATCH v5 1/5] dt-bindings: ata: ahci-platform:
 Convert DT bindings to yaml

On 06/03/2022 11:41, Frank Wunderlich wrote:
>> Gesendet: Sonntag, 06. März 2022 um 11:27 Uhr
>> Von: "Krzysztof Kozlowski" <krzysztof.kozlowski@...onical.com>
>>>     add compatibles used together with generic-ahci
>>>       - marvell,berlin2-ahci
>>
>> This is fine, just mention it in commit msg.
>>
>>>       - qcom,apq8064-ahci
>>>       - qcom,ipq806x-ahci
>>
>> These you need to consult with qcom-sata.txt. This could be a following
>> commit which will integrate qcom-sata.txt and remove it.
> 
> this depends on Robs opinion

Then maybe precise the question for Rob...

> 
>> Either you have
>> binding document for all devices or you create a common part, like for UFS:
>> https://lore.kernel.org/linux-devicetree/20220222145854.358646-1-krzysztof.kozlowski@canonical.com/
>> https://github.com/krzk/linux/commits/n/dt-bindings-ufs-v2
>>
>> The choice depends more or less on complexity of bindings, IOW, how big
>> and complicated bindings would be if you combine everything to one YAML.
>>
>> In the case of UFS, the devices differ - by clocks, resets, phys and
>> sometimes supplies. Therefore it easier to have one common shared part
>> and several device bindings.
>>
>> AHCI looks more consistent - except that Qualcomm - so maybe better to
>> have one document.
>>
>>>     increase reg-count to 2 (used in omap5-l4.dtsi)
>>>     increase clock-count to 5 (used in qcom-apq8064.dtsi)
>>
>> This would need allOf+if.
> 
> if i get ok from rob i add only the berlin-compatible and skip the qcom+reg/clock-change in the first applied version. Adding the allOf/if (and making it right) will only delay the sata-binding/dts-change.

I don't get what is the problem with delaying this patch for the time
needed to make the bindings correct? Especially that alternative is to
add bindings document which soon will need to be modified, e.g. split
into common part. Is there a particular hurry with these bindings
conversion?


Best regards,
Krzysztof