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Mon, 03 Nov 2025 00:03:15 -0800 (PST) From: Peter Griffin Date: Mon, 03 Nov 2025 08:03:10 +0000 Subject: [PATCH 1/2] dt-bindings: soc: samsung: exynos-pmu: remove syscon for google,gs101-pmu Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20251103-remove-pmu-syscon-compat-v1-1-f2cb7f9ade6f@linaro.org> References: <20251103-remove-pmu-syscon-compat-v1-0-f2cb7f9ade6f@linaro.org> In-Reply-To: <20251103-remove-pmu-syscon-compat-v1-0-f2cb7f9ade6f@linaro.org> To: =?utf-8?q?Andr=C3=A9_Draszik?= , Tudor Ambarus , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Alim Akhtar Cc: linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, dan.carpenter@linaro.org, kernel-team@android.com, willmcvicker@google.com, dan.carpenter@linaro.org, arnd@arndb.de, robh@kernel.org, Peter Griffin X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; 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a=openpgp; fpr=0EFC8E6F5578750D56B549FCCEE8B8D6023472BA 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 w= ith syscon (as a mmio regmap created by syscon will not work on gs101). Signed-off-by: Peter Griffin --- 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..c5dd132a2b6948f8eda93e4a32d= dd1b57a83fcc0 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: + - items: + - const: google,gs101-pmu - items: - enum: - - google,gs101-pmu - samsung,exynos3250-pmu - samsung,exynos4210-pmu - samsung,exynos4212-pmu --=20 2.51.1.930.gacf6e81ea2-goog From nobody Sun Feb 8 19:48:32 2026 Received: from mail-wr1-f52.google.com (mail-wr1-f52.google.com [209.85.221.52]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 22D7F2D7397 for ; 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Mon, 03 Nov 2025 00:03:17 -0800 (PST) Received: from gpeter-l.roam.corp.google.com ([145.224.65.248]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4773c4ac5d6sm142336215e9.8.2025.11.03.00.03.16 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 03 Nov 2025 00:03:17 -0800 (PST) From: Peter Griffin Date: Mon, 03 Nov 2025 08:03:11 +0000 Subject: [PATCH 2/2] arm64: dts: exynos: gs101: remove syscon compatible from pmu node Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20251103-remove-pmu-syscon-compat-v1-2-f2cb7f9ade6f@linaro.org> References: <20251103-remove-pmu-syscon-compat-v1-0-f2cb7f9ade6f@linaro.org> In-Reply-To: <20251103-remove-pmu-syscon-compat-v1-0-f2cb7f9ade6f@linaro.org> To: =?utf-8?q?Andr=C3=A9_Draszik?= , Tudor Ambarus , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Alim Akhtar Cc: linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, dan.carpenter@linaro.org, kernel-team@android.com, willmcvicker@google.com, dan.carpenter@linaro.org, arnd@arndb.de, robh@kernel.org, Peter Griffin X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; 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a=openpgp; fpr=0EFC8E6F5578750D56B549FCCEE8B8D6023472BA 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. As mentioned in that commit, it's not correct to claim we are compatible with syscon, as a MMIO regmap created by syscon won't work. Removing the syscon compatible means syscon driver won't ever create a mmio regmap. Note this isn't usually an issue today as exynos-pmu runs at an early initcall so the custom regmap will have been registered first. However changes proposed in [1] will bring -EPROBE_DEFER support to syscon allowing this mechanism to be more robust, especially in highly modularized systems. Technically this is a ABI break but no other platforms are affected. Link: https://lore.kernel.org/lkml/aQdHmrchkmOr34r3@stanley.mountain/ [1] Signed-off-by: Peter Griffin --- arch/arm64/boot/dts/exynos/google/gs101.dtsi | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm64/boot/dts/exynos/google/gs101.dtsi b/arch/arm64/boot= /dts/exynos/google/gs101.dtsi index d06d1d05f36408137a8acd98e43d48ea7d4f4292..e1a7d33fd4a369f7b352b81d207= 0beb62a0ced16 100644 --- a/arch/arm64/boot/dts/exynos/google/gs101.dtsi +++ b/arch/arm64/boot/dts/exynos/google/gs101.dtsi @@ -1705,7 +1705,7 @@ sysreg_apm: syscon@17420000 { }; =20 pmu_system_controller: system-controller@17460000 { - compatible =3D "google,gs101-pmu", "syscon"; + compatible =3D "google,gs101-pmu"; reg =3D <0x17460000 0x10000>; google,pmu-intr-gen-syscon =3D <&pmu_intr_gen>; =20 --=20 2.51.1.930.gacf6e81ea2-goog