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

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Date:   Wed, 8 Feb 2023 19:58:07 +0000
From:   Mark Brown <broonie@...nel.org>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.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 Wed, Feb 08, 2023 at 08:37:22PM +0100, Krzysztof Kozlowski wrote:
> 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

Strictly the supplies are mandatory, it's just that the code was written
such that the default configuration is that they'll be provided by the
internal LDOs, with the DT having carried that on.

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