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[v5,5/5] arm64: dts: qcom: ipq5424: add support to get watchdog bootstatus from IMEM

Message ID 20250610-wdt_reset_reason-v5-5-2d2835160ab5@oss.qualcomm.com
State New
Headers show
Series Add support to read the watchdog bootstatus from IMEM | expand

Commit Message

Kathiravan Thirumoorthy June 10, 2025, 1:45 p.m. UTC 
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@oss.qualcomm.com>
---
Changes in v5:
	- Rename the property 'qcom,imem' to 'sram'
Changes in v4:
	- New patch
---
 arch/arm64/boot/dts/qcom/ipq5424.dtsi | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
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Patch

diff --git a/arch/arm64/boot/dts/qcom/ipq5424.dtsi b/arch/arm64/boot/dts/qcom/ipq5424.dtsi
index 7fdc003f210e5a69944b00361a16fbdf58f39801..1d5f943b3aa6be1c1bb7b74d9d44c8e1755678a4 100644
--- a/arch/arm64/boot/dts/qcom/ipq5424.dtsi
+++ b/arch/arm64/boot/dts/qcom/ipq5424.dtsi
@@ -485,6 +485,7 @@  watchdog@f410000 {
 			reg = <0 0x0f410000 0 0x1000>;
 			interrupts = <GIC_SPI 0 IRQ_TYPE_EDGE_RISING>;
 			clocks = <&sleep_clk>;
+			sram = <&imem 0x7b0 0x5>;
 		};
 
 		qusb_phy_1: phy@71000 {
@@ -591,7 +592,7 @@  ssphy_0: phy@7d000 {
 			status = "disabled";
 		};
 
-		sram@8600000 {
+		imem: sram@8600000 {
 			compatible = "qcom,ipq5424-imem", "syscon", "simple-mfd";
 			reg = <0 0x08600000 0 0x1c000>;
 			ranges = <0 0 0x08600000 0x1c000>;