linux-kernel - [PATCH v4 5/5] arm64: dts: qcom: ipq5424: add support to get watchdog bootstatus from IMEM

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20250519-wdt_reset_reason-v4-5-d59d21275c75@oss.qualcomm.com>
Date: Mon, 19 May 2025 14:04:05 +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>,
        Rajendra Nayak <quic_rjendra@...cinc.com>
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 v4 5/5] arm64: dts: qcom: ipq5424: add support to get
 watchdog bootstatus from IMEM

Add the "qcom,imem" property to the watchdog device node to enable
retrieval of the system restart reason from IMEM, populated by XBL.
Parse this information in the watchdog driver and update the bootstatus
sysFS if the restart was triggered by a watchdog timeout.

Signed-off-by: Kathiravan Thirumoorthy <kathiravan.thirumoorthy@....qualcomm.com>
---
Changes in v4:
	- New patch
---
 arch/arm64/boot/dts/qcom/ipq5424.dtsi | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/qcom/ipq5424.dtsi b/arch/arm64/boot/dts/qcom/ipq5424.dtsi
index 4f18ea79502738c2b9cb4b13e8eb4ac4ddd89adf..8952d769dad4ec4635759d6eae8344aaf1d8a79e 100644
--- a/arch/arm64/boot/dts/qcom/ipq5424.dtsi
+++ b/arch/arm64/boot/dts/qcom/ipq5424.dtsi
@@ -380,6 +380,7 @@ watchdog@...0000 {
 			reg = <0 0x0f410000 0 0x1000>;
 			interrupts = <GIC_SPI 0 IRQ_TYPE_EDGE_RISING>;
 			clocks = <&sleep_clk>;
+			qcom,imem = <&imem 0x7b0 0x5>;
 		};
 
 		qusb_phy_1: phy@...00 {
@@ -486,7 +487,7 @@ ssphy_0: phy@...00 {
 			status = "disabled";
 		};
 
-		sram@...0000 {
+		imem: sram@...0000 {
 			compatible = "qcom,ipq5424-imem", "syscon", "simple-mfd";
 			reg = <0 0x08600000 0 0x1c000>;
 			ranges = <0 0 0x08600000 0x1c000>;

-- 
2.34.1