linux-kernel - [PATCH] arm64: dts: qcom: sm8750: Enable download mode register write

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Message-ID: <20260112151725.2308971-1-mukesh.ojha@oss.qualcomm.com>
Date: Mon, 12 Jan 2026 20:47:25 +0530
From: Mukesh Ojha <mukesh.ojha@....qualcomm.com>
To: andersson@...nel.org, konradybcio@...nel.org, robh@...nel.org,
        krzk+dt@...nel.org, conor+dt@...nel.org
Cc: devicetree@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Mukesh Ojha <mukesh.ojha@....qualcomm.com>
Subject: [PATCH] arm64: dts: qcom: sm8750: Enable download mode register write

Enable download mode setting for sm8750 which can help collect
ramdump for this SoC.

Signed-off-by: Mukesh Ojha <mukesh.ojha@....qualcomm.com>
---
 arch/arm64/boot/dts/qcom/sm8750.dtsi | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/sm8750.dtsi b/arch/arm64/boot/dts/qcom/sm8750.dtsi
index c0734f6185e1..c812b2d26483 100644
--- a/arch/arm64/boot/dts/qcom/sm8750.dtsi
+++ b/arch/arm64/boot/dts/qcom/sm8750.dtsi
@@ -203,6 +203,7 @@ domain_ss3: domain-sleep-0 {
 	firmware {
 		scm: scm {
 			compatible = "qcom,scm-sm8750", "qcom,scm";
+			qcom,dload-mode = <&tcsr 0x19000>;
 			interconnects = <&aggre2_noc MASTER_CRYPTO QCOM_ICC_TAG_ALWAYS
 					 &mc_virt SLAVE_EBI1 QCOM_ICC_TAG_ALWAYS>;
 		};
@@ -2097,6 +2098,11 @@ tcsr_mutex: hwlock@...0000 {
 			#hwlock-cells = <1>;
 		};
 
+		tcsr: syscon@...0000 {
+			compatible = "qcom,sm8750-tcsr", "syscon";
+			reg = <0 0x01fc0000 0 0x30000>;
+		};
+
 		remoteproc_mpss: remoteproc@...0000 {
 			compatible = "qcom,sm8750-mpss-pas";
 			reg = <0x0 0x04080000 0x0 0x10000>;
-- 
2.50.1