linux-kernel - Re: [PATCH] regulator: dt-bindings: mt6357: Drop fixed compatible requirement

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Message-ID: <20250514-unifier-drone-9e50962071ff@spud>
Date: Wed, 14 May 2025 16:14:27 +0100
From: Conor Dooley <conor@...nel.org>
To: Nícolas F. R. A. Prado <nfraprado@...labora.com>
Cc: Liam Girdwood <lgirdwood@...il.com>, Mark Brown <broonie@...nel.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Matthias Brugger <matthias.bgg@...il.com>,
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
	Chen Zhong <chen.zhong@...iatek.com>,
	Fabien Parent <fabien.parent@...aro.org>,
	Alexandre Mergnat <amergnat@...libre.com>, kernel@...labora.com,
	linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-mediatek@...ts.infradead.org
Subject: Re: [PATCH] regulator: dt-bindings: mt6357: Drop fixed compatible
 requirement

On Wed, May 14, 2025 at 08:36:06AM -0400, Nícolas F. R. A. Prado wrote:
> Some of the regulators on the MT6357 PMIC currently reference the
> fixed-regulator dt-binding, which enforces the presence of a
> regulator-fixed compatible. However since all regulators on the MT6357
> PMIC are handled by a single mt6357-regulator driver, probed through
> MFD, the compatibles don't serve any purpose. In fact they cause
> failures in the DT kselftest since they aren't probed by the fixed
> regulator driver as would be expected. Furthermore this is the only
> dt-binding in this family like this: mt6359-regulator and
> mt6358-regulator don't require those compatibles.
> 
> Commit d77e89b7b03f ("arm64: dts: mediatek: mt6357: Drop regulator-fixed
> compatibles") removed the compatibles from Devicetree, but missed
> updating the binding, which still requires them, introducing dt-binding
> errors. Remove the compatible requirement by referencing the plain
> regulator dt-binding instead to fix the dt-binding errors.
> 
> Fixes: d77e89b7b03f ("arm64: dts: mediatek: mt6357: Drop regulator-fixed compatibles")
> Signed-off-by: Nícolas F. R. A. Prado <nfraprado@...labora.com>

Acked-by: Conor Dooley <conor.dooley@...rochip.com>

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