linux-kernel - [PATCH v1 5/5] arm64: dts: qcom: sm8250: Add memory dump node

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Message-ID: <1698052857-6918-6-git-send-email-quic_zhenhuah@quicinc.com>
Date:   Mon, 23 Oct 2023 17:20:57 +0800
From:   Zhenhua Huang <quic_zhenhuah@...cinc.com>
To:     <agross@...nel.org>, <andersson@...nel.org>,
        <konrad.dybcio@...aro.org>, <robh+dt@...nel.org>,
        <krzysztof.kozlowski+dt@...aro.org>, <conor+dt@...nel.org>
CC:     <linux-arm-msm@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <kernel@...cinc.com>,
        <quic_tingweiz@...cinc.com>,
        Zhenhua Huang <quic_zhenhuah@...cinc.com>
Subject: [PATCH v1 5/5] arm64: dts: qcom: sm8250: Add memory dump node

Add device node for memory dump on sm8250. Usage of memory dump
is to populate configuration in reserved memory, allowing
firmware to do the dump accordingly.

Signed-off-by: Zhenhua Huang <quic_zhenhuah@...cinc.com>
---
 arch/arm64/boot/dts/qcom/sm8250.dtsi | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/sm8250.dtsi b/arch/arm64/boot/dts/qcom/sm8250.dtsi
index a4e58ad..d379524 100644
--- a/arch/arm64/boot/dts/qcom/sm8250.dtsi
+++ b/arch/arm64/boot/dts/qcom/sm8250.dtsi
@@ -674,6 +674,11 @@
 		reg = <0x0 0x80000000 0x0 0x0>;
 	};
 
+	mem-dump {
+		compatible = "qcom,mem-dump";
+		memory-region = <&dump_mem>;
+	};
+
 	pmu {
 		compatible = "arm,armv8-pmuv3";
 		interrupts = <GIC_PPI 7 IRQ_TYPE_LEVEL_LOW>;
@@ -851,6 +856,13 @@
 			reg = <0x0 0x8bf00000 0x0 0x4600000>;
 			no-map;
 		};
+
+		dump_mem: mem-dump-region {
+			compatible = "shared-dma-pool";
+			size = <0 0x2800000>;
+			alloc-ranges = <0x0 0x00000000 0x0 0xffffffff>;
+			reusable;
+		};
 	};
 
 	smem {
@@ -5424,6 +5436,25 @@
 			};
 		};
 
+		sram@...bf000 {
+			compatible = "qcom,sm8250-imem", "syscon", "simple-mfd";
+			reg = <0 0x146bf000 0 0x1000>;
+			ranges = <0 0 0x146bf000 0x1000>;
+
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			mem-dump-table@10 {
+			    compatible = "qcom,qcom-imem-mem-dump-table";
+			    reg = <0x10 0x8>;
+			};
+
+			mem-dump-table-size@724 {
+				compatible = "qcom,qcom-imem-mem-dump-table-size";
+				reg = <0x724 0x8>;
+			};
+		};
+
 		apps_smmu: iommu@...00000 {
 			compatible = "qcom,sm8250-smmu-500", "qcom,smmu-500", "arm,mmu-500";
 			reg = <0 0x15000000 0 0x100000>;
-- 
2.7.4