linux-kernel - [PATCH RFC 6/6] arm64: dts: qcom: ipq5424: add node for the restart reason information

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Message-Id: <20250408-wdt_reset_reason-v1-6-e6ec30c2c926@oss.qualcomm.com>
Date: Tue, 08 Apr 2025 14:19:56 +0530
From: Kathiravan Thirumoorthy <kathiravan.thirumoorthy@....qualcomm.com>
To: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>,
        Wim Van Sebroeck <wim@...ux-watchdog.org>,
        Guenter Roeck <linux@...ck-us.net>
Cc: linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-watchdog@...r.kernel.org,
        Kathiravan Thirumoorthy <kathiravan.thirumoorthy@....qualcomm.com>
Subject: [PATCH RFC 6/6] arm64: dts: qcom: ipq5424: add node for the
 restart reason information

Add a child node to the IMEM region to capture the system restart reason
in Qualcomm IPQ SoCs. This information is populated by the WDT driver via
bootstatus sysfs.

Signed-off-by: Kathiravan Thirumoorthy <kathiravan.thirumoorthy@....qualcomm.com>
---
 arch/arm64/boot/dts/qcom/ipq5424.dtsi | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/ipq5424.dtsi b/arch/arm64/boot/dts/qcom/ipq5424.dtsi
index a772736f314f46d11c473160c522af4edeb900b7..d399ae506748b22c1dc653d357c6fd071dd67f04 100644
--- a/arch/arm64/boot/dts/qcom/ipq5424.dtsi
+++ b/arch/arm64/boot/dts/qcom/ipq5424.dtsi
@@ -493,6 +493,11 @@ sram@...0000 {
 
 			#address-cells = <1>;
 			#size-cells = <1>;
+
+			restart-reason@7b0 {
+				compatible = "qcom,restart-reason-info";
+				reg = <0x7b0 0x4>;
+			};
 		};
 
 		usb3: usb3@...0000 {

-- 
2.34.1