linux-kernel - [PATCH v2] arm64: dts: qcom: talos: add ETR device

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Message-Id: <20260128-enable-etr-on-talos-v2-1-ba77063d6b62@oss.qualcomm.com>
Date: Wed, 28 Jan 2026 09:25:34 +0800
From: Jie Gan <jie.gan@....qualcomm.com>
To: Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>, Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Tingwei Zhang <tingwei.zhang@....qualcomm.com>
Cc: linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Konrad Dybcio <konrad.dybcio@....qualcomm.com>,
        Jie Gan <jie.gan@....qualcomm.com>
Subject: [PATCH v2] arm64: dts: qcom: talos: add ETR device

Add the TMC ETR device to store collected trace data in DDR memory.

Reviewed-by: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
Signed-off-by: Jie Gan <jie.gan@....qualcomm.com>
---
Chnages in V2:
- Remove the un-used label.
Link to V1: https://lore.kernel.org/all/20260123-enable-etr-and-ctcu-devices-v1-1-5fbb3423a2d7@oss.qualcomm.com/
---
 arch/arm64/boot/dts/qcom/talos.dtsi | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/talos.dtsi b/arch/arm64/boot/dts/qcom/talos.dtsi
index 75716b4a58d6..544b1a2fa027 100644
--- a/arch/arm64/boot/dts/qcom/talos.dtsi
+++ b/arch/arm64/boot/dts/qcom/talos.dtsi
@@ -2253,6 +2253,14 @@ out-ports {
 				#address-cells = <1>;
 				#size-cells = <0>;
 
+				port@0 {
+					reg = <0>;
+
+					replicator0_out0: endpoint {
+						remote-endpoint = <&tmc_etr_in>;
+					};
+				};
+
 				port@1 {
 					reg = <1>;
 
@@ -2287,6 +2295,25 @@ tmc_etf_out: endpoint {
 			};
 		};
 
+		tmc@...8000 {
+			compatible = "arm,coresight-tmc", "arm,primecell";
+			reg = <0x0 0x06048000 0x0 0x1000>;
+
+			clocks = <&aoss_qmp>;
+			clock-names = "apb_pclk";
+
+			iommus = <&apps_smmu 0x01e0 0x0>;
+			arm,scatter-gather;
+
+			in-ports {
+				port {
+					tmc_etr_in: endpoint {
+						remote-endpoint = <&replicator0_out0>;
+					};
+				};
+			};
+		};
+
 		replicator@...a000 {
 			compatible = "arm,coresight-dynamic-replicator", "arm,primecell";
 			reg = <0x0 0x0604a000 0x0 0x1000>;

---
base-commit: 4f938c7d3b25d87b356af4106c2682caf8c835a2
change-id: 20260128-enable-etr-on-talos-ee30dbac706f

Best regards,
-- 
Jie Gan <jie.gan@....qualcomm.com>