linux-kernel - Re: [PATCH v2 1/2] dt-bindings: soc: samsung: exynos-pmu: remove syscon for google,gs101-pmu

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Message-ID: <176359734563.3602720.3498297116767646950.robh@kernel.org>
Date: Wed, 19 Nov 2025 18:09:06 -0600
From: "Rob Herring (Arm)" <robh@...nel.org>
To: Peter Griffin <peter.griffin@...aro.org>
Cc: Tudor Ambarus <tudor.ambarus@...aro.org>, dan.carpenter@...aro.org,
	Conor Dooley <conor+dt@...nel.org>,
	linux-samsung-soc@...r.kernel.org, willmcvicker@...gle.com,
	devicetree@...r.kernel.org, Alim Akhtar <alim.akhtar@...sung.com>,
	kernel-team@...roid.com, arnd@...db.de,
	André Draszik <andre.draszik@...aro.org>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Krzysztof Kozlowski <krzk+dt@...nel.org>
Subject: Re: [PATCH v2 1/2] dt-bindings: soc: samsung: exynos-pmu: remove
 syscon for google,gs101-pmu


On Fri, 14 Nov 2025 12:00:16 +0000, Peter Griffin wrote:
> Since commit ba5095ebbc7a ("mfd: syscon: Allow syscon nodes without a
> "syscon" compatible") it is possible to register a regmap without the
> syscon compatible in the node.
> 
> Update the bindings for google,gs101-pmu so that the syscon compatible is
> no longer required. As it isn't really correct to claim we are compatible
> with syscon (as a mmio regmap created by syscon will not work on gs101).
> 
> Additionally (with the benefit of hindsight) PMU register writes were never
> working with a MMIO syscon on gs101, so the ABI break is justified.
> 
> Signed-off-by: Peter Griffin <peter.griffin@...aro.org>
> ---
> Changes in v2:
>  - Update commit description (Krzysztof)
>  - Change Items to enum, remove const (Krzysztof)
>  - Checkpatch warning commit msg length (Krzysztof)
> ---
>  Documentation/devicetree/bindings/soc/samsung/exynos-pmu.yaml | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 

Acked-by: Rob Herring (Arm) <robh@...nel.org>