linux-kernel - Re: [PATCH] ASoC: dt-bindings: wlf,wm8994: Convert to dtschema

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Date:   Wed, 8 Feb 2023 20:37:22 +0100
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Mark Brown <broonie@...nel.org>
Cc:     Liam Girdwood <lgirdwood@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        - <patches@...nsource.cirrus.com>, alsa-devel@...a-project.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ASoC: dt-bindings: wlf,wm8994: Convert to dtschema

On 08/02/2023 19:09, Mark Brown wrote:
> 
>>> Are you *sure* they are grounded and not supplied from the LDOs?
> 
>> That's what I have on schematics (attached), if I got it right.
> 
> You'll notice that they've got decoupling caps on rather than being
> grounded - there's an internal connection to the LDO output so if the
> LDOs are in use that's all that's required, while if the LDOs are not in
> use for some reason then an external supply is connected there.

Yes, indeed, not grounded. I'll rephrase the commit. I also found few
other differences needed:
1. AVDD2 should be always required,
2. LDO2VDD exists on WM8994.

Best regards,
Krzysztof