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

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Message-Id: <20251114-remove-pmu-syscon-compat-v2-1-9496e8c496c7@linaro.org>
Date: Fri, 14 Nov 2025 12:00:16 +0000
From: Peter Griffin <peter.griffin@...aro.org>
To: André Draszik <andre.draszik@...aro.org>, 
 Tudor Ambarus <tudor.ambarus@...aro.org>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Alim Akhtar <alim.akhtar@...sung.com>
Cc: linux-arm-kernel@...ts.infradead.org, linux-samsung-soc@...r.kernel.org, 
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
 kernel-team@...roid.com, willmcvicker@...gle.com, dan.carpenter@...aro.org, 
 arnd@...db.de, robh@...nel.org, Peter Griffin <peter.griffin@...aro.org>
Subject: [PATCH v2 1/2] dt-bindings: soc: samsung: exynos-pmu: remove
 syscon for google,gs101-pmu

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(-)

diff --git a/Documentation/devicetree/bindings/soc/samsung/exynos-pmu.yaml b/Documentation/devicetree/bindings/soc/samsung/exynos-pmu.yaml
index be1441193feeea1c12d0d5370168e9316c8dcf76..84821c38d28d0be6d44fca06bfd63bffc12a8656 100644
--- a/Documentation/devicetree/bindings/soc/samsung/exynos-pmu.yaml
+++ b/Documentation/devicetree/bindings/soc/samsung/exynos-pmu.yaml
@@ -34,9 +34,10 @@ select:
 properties:
   compatible:
     oneOf:
+      - enum:
+          - google,gs101-pmu
       - items:
           - enum:
-              - google,gs101-pmu
               - samsung,exynos3250-pmu
               - samsung,exynos4210-pmu
               - samsung,exynos4212-pmu

-- 
2.52.0.rc1.455.g30608eb744-goog