linux-kernel - Re: [PATCH 1/2] ASoC: dt-bindings: Add adi,ssm3515 amp schema

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Message-Id: <5FC57F67-CC16-4DA4-9A0D-9F9A0539EE67@cutebit.org>
Date:   Wed, 10 May 2023 10:29:17 +0200
From:   Martin Povišer <povik+lin@...ebit.org>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc:     Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Nuno Sá <nuno.sa@...log.com>,
        asahi@...ts.linux.dev, alsa-devel@...a-project.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] ASoC: dt-bindings: Add adi,ssm3515 amp schema



> On 10. 5. 2023, at 10:23, Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org> wrote:
> 
> On 10/05/2023 10:15, Martin Povišer wrote:
>> 
>>> On 10. 5. 2023, at 9:51, Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org> wrote:
>>> 
>>> On 09/05/2023 18:38, Martin Povišer wrote:
>>>> Add a DT schema for the SSM3515 amp by Analog Devices. It's a simple
>>>> mono amplifier with digital input.
>>>> 
>>>> Signed-off-by: Martin Povišer <povik+lin@...ebit.org>

>>>> +additionalProperties: true
>>> 
>>> uinevaluatedProperties: false instead, so users can have name-prefix.
>> 
>> I actually tweaked this to have the example passing, which has sound-name-prefix,
> 
> true is not allowed anyway - it makes your schema simply not effective
> almost at all as it allows anything...

That makes sense.

>> which I guess is what you have in mind. Not that I exactly understand what these
>> options do (both additionalProperties and unevaluatedProperties), the schema docs
>> didn’t enlighten me right away when I looked into it.
> 
> The way to go and to start always is to look at example-schema. It tells
> you explicitly to use additionalProperties:false and switch to
> unevaluated "If and only if another schema is referenced".

OK. While I have you on the line, what does unevaluated do? In what sense are props
unevaluated?

> Best regards,
> Krzysztof

Regards,
Martin