linux-kernel - DT schema bindings conversion mentorships (was Re: [PATCH v5] ASoC: dt-bindings: omap-mcpdm: Convert to DT schema)

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Date: Wed, 22 May 2024 19:05:24 +0200
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Daniel Baluta <daniel.baluta@....com>,
 Shuah Khan <skhan@...uxfoundation.org>, Julia Lawall
 <julia.lawall@...ia.fr>, Javier Carrasco <javier.carrasco.cruz@...il.com>
Cc: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
 Conor Dooley <conor+dt@...nel.org>, devicetree@...r.kernel.org,
 Péter Ujfalusi <peter.ujfalusi@...il.com>,
 linux-kernel@...r.kernel.org
Subject: DT schema bindings conversion mentorships (was Re: [PATCH v5] ASoC:
 dt-bindings: omap-mcpdm: Convert to DT schema)

On 22/05/2024 18:42, Krzysztof Kozlowski wrote:
>> Yes, the binding document was neglected pretty badly but when converting
>> to yaml it has to be correct since that will have ripple effect on
>> existing dts/dtsi files.
> 
> Yep. And testing DTS should clearly show that conversion leads to
> incomplete binding.
> 
>>
>>> I assume the DTS was validated with the binding. Isn't the case here?
> 
> Mithil Bavishi,
> Are you sure you tested the DTS?

Dear Daniel, Shuah, Julia, Javier and other mentorship managers,

I see some contributions regarding Devicetree bindings which look like
efforts of some mentorship programs. It's great, I really like it. Only
sadness is that no one ever asked us, Devicetree maintainers, about some
sort of guidelines. This leads to sub-optimal allocation of tasks and
quite a strain on reviewers side: for example we receive contributions
which were never tested (tested as in make target - make
dt_binding_check). Or people converted bindings which really do not
matter thus their work soon will become obsolete.

If there are still such active programs, please be sure that mentees
follow these guidelines:

https://social.kernel.org/notice/Ai9hYRUKo8suzX3zNY

1. Please convert bindings which have active DTS users. First choose
bindings with DTS built by arm64 defconfig, then next choice by arm
multi_v7 defconfig. Then any other ARM or different architecture DTS.

2. Be sure dt_bindings_check (including yamllint) and checkpatch pass
without any warnings. See writing-schema.rst document.

3. Be sure DTS using these bindings passes dtbs_check validation. If
this means binding needs to be adapted during conversion, mention
briefly in the commit message changes done comparing to pure TXT->DT
schema conversion.

Best regards,
Krzysztof