[PATCH v2 5/5] arm64: dts: qcom: ipq5332: add support to get watchdog bootstatus from IMEM
From: Kathiravan Thirumoorthy
Date: Fri Oct 02 2026 - 09:10:28 EST
Add the "sram" 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@xxxxxxxxxxxxxxxx>
---
arch/arm64/boot/dts/qcom/ipq5332.dtsi | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/arch/arm64/boot/dts/qcom/ipq5332.dtsi b/arch/arm64/boot/dts/qcom/ipq5332.dtsi
index 3e10f45e182e..c1b083624696 100644
--- a/arch/arm64/boot/dts/qcom/ipq5332.dtsi
+++ b/arch/arm64/boot/dts/qcom/ipq5332.dtsi
@@ -496,8 +496,16 @@ qpic_nand: spi@79b0000 {
sram@8600000 {
compatible = "qcom,ipq5332-imem", "mmio-sram";
reg = <0x08600000 0x14000>;
+ ranges = <0 0x08600000 0x14000>;
no-memory-wc;
+
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ restart_reason: restartreason-sram@7a4 {
+ reg = <0x7a4 0x4>;
+ };
};
usb: usb@8af8800 {
@@ -585,6 +593,7 @@ watchdog: watchdog@b017000 {
interrupts = <GIC_SPI 3 IRQ_TYPE_EDGE_RISING>;
clocks = <&sleep_clk>;
timeout-sec = <30>;
+ sram = <&restart_reason>;
};
apcs_glb: mailbox@b111000 {
--
2.34.1