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Mon, 14 Sep 2026 09:58:46 -0700 (PDT) From: Alexey Klimov Date: Mon, 14 Sep 2026 17:58:44 +0100 Subject: [PATCH v4 1/2] dt-bindings: sram: Document samsung,exynos850-acpm-sram 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: <20260914-exynos850_sram-v4-1-253871de0f61@linaro.org> References: <20260914-exynos850_sram-v4-0-253871de0f61@linaro.org> In-Reply-To: <20260914-exynos850_sram-v4-0-253871de0f61@linaro.org> To: Sam Protsenko , Rob Herring , Krzysztof Kozlowski , Peter Griffin Cc: Conor Dooley , Alim Akhtar , Tudor Ambarus , linux-samsung-soc@vger.kernel.org, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Krzysztof Kozlowski X-Mailer: b4 0.14.3 Document "samsung,exynos850-acpm-sram" which represents an SRAM region used for ACPM communication on Samsung-based SoCs. The SRAM is consumed as a whole, is not split up using child nodes and properties related to this are not required, that is why "mmio-sram" compatible can't be used for ACPM purposes because it requires child nodes to be declared, which are not needed and make no sense in case of ACPM. Reviewed-by: Krzysztof Kozlowski Reviewed-by: Sam Protsenko Signed-off-by: Alexey Klimov Reviewed-by: Peter Griffin --- Documentation/devicetree/bindings/sram/sram.yaml | 2 ++ 1 file changed, 2 insertions(+) diff --git a/Documentation/devicetree/bindings/sram/sram.yaml b/Documentati= on/devicetree/bindings/sram/sram.yaml index b83fc6831947..b9c4d4f3199b 100644 --- a/Documentation/devicetree/bindings/sram/sram.yaml +++ b/Documentation/devicetree/bindings/sram/sram.yaml @@ -43,6 +43,7 @@ properties: - qcom,rpm-msg-ram - qcom,shikra-imem - rockchip,rk3288-pmu-sram + - samsung,exynos850-acpm-sram =20 reg: maxItems: 1 @@ -159,6 +160,7 @@ if: enum: - qcom,rpm-msg-ram - rockchip,rk3288-pmu-sram + - samsung,exynos850-acpm-sram then: required: - "#address-cells" --=20 2.51.0 From nobody Fri Sep 25 09:22:49 2026 Received: from mail-wr1-f44.google.com (mail-wr1-f44.google.com [209.85.221.44]) (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 6A9F748D872 for ; 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Mon, 14 Sep 2026 09:58:47 -0700 (PDT) Received: from [127.0.1.1] ([94.4.85.166]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-486eb32e81asm29636198f8f.7.2026.09.14.09.58.46 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 14 Sep 2026 09:58:47 -0700 (PDT) From: Alexey Klimov Date: Mon, 14 Sep 2026 17:58:45 +0100 Subject: [PATCH v4 2/2] arm64: dts: exynos850: Add acpm SRAM 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: <20260914-exynos850_sram-v4-2-253871de0f61@linaro.org> References: <20260914-exynos850_sram-v4-0-253871de0f61@linaro.org> In-Reply-To: <20260914-exynos850_sram-v4-0-253871de0f61@linaro.org> To: Sam Protsenko , Rob Herring , Krzysztof Kozlowski , Peter Griffin Cc: Conor Dooley , Alim Akhtar , Tudor Ambarus , linux-samsung-soc@vger.kernel.org, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org X-Mailer: b4 0.14.3 SRAM is used by the ACPM protocol to retrieve the ACPM channels information and configuration data. Add the SRAM node. Signed-off-by: Alexey Klimov Reviewed-by: Peter Griffin Reviewed-by: Sam Protsenko --- arch/arm64/boot/dts/exynos/exynos850.dtsi | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/arch/arm64/boot/dts/exynos/exynos850.dtsi b/arch/arm64/boot/dt= s/exynos/exynos850.dtsi index 911643008b9f..2128749d7647 100644 --- a/arch/arm64/boot/dts/exynos/exynos850.dtsi +++ b/arch/arm64/boot/dts/exynos/exynos850.dtsi @@ -176,6 +176,11 @@ soc: soc@0 { #size-cells =3D <1>; ranges =3D <0x0 0x0 0x0 0x20000000>; =20 + apm_sram: sram@2039000 { + compatible =3D "samsung,exynos850-acpm-sram"; + reg =3D <0x2039000 0x30000>; + }; + chipid@10000000 { compatible =3D "samsung,exynos850-chipid"; reg =3D <0x10000000 0x100>; --=20 2.51.0