* [PATCH v3 1/3] dt-bindings: sram: Document IMEM found in Qualcomm's IPQ9574 and IPQ5332
2026-10-19 16:46 [PATCH v3 0/3] Add support for reporting boot status on Qualcomm IPQ9574 and IPQ5332 Kathiravan Thirumoorthy
@ 2026-10-19 16:46 ` Kathiravan Thirumoorthy
2026-10-19 16:46 ` [PATCH v3 2/3] arm64: dts: qcom: ipq9574: add support to get watchdog bootstatus from IMEM Kathiravan Thirumoorthy
2026-10-19 16:46 ` [PATCH v3 3/3] arm64: dts: qcom: ipq5332: " Kathiravan Thirumoorthy
2 siblings, 0 replies; 6+ messages in thread
From: Kathiravan Thirumoorthy @ 2026-10-19 16:46 UTC (permalink / raw)
To: Rob Herring, Krzysztof Kozlowski, Conor Dooley, Bjorn Andersson,
Konrad Dybcio, Abel Vesa
Cc: devicetree, linux-kernel, linux-arm-msm, Kathiravan Thirumoorthy,
Krzysztof Kozlowski
Document the compatibles for the IMEM found in the Qualcomm's IPQ9574
and IPQ5332 SoCs.
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Signed-off-by: Kathiravan Thirumoorthy <kathiravan.thirumoorthy@oss.qualcomm.com>
---
Documentation/devicetree/bindings/sram/sram.yaml | 2 ++
1 file changed, 2 insertions(+)
diff --git a/Documentation/devicetree/bindings/sram/sram.yaml b/Documentation/devicetree/bindings/sram/sram.yaml
index 6ee0b1464722..b09a70b3d576 100644
--- a/Documentation/devicetree/bindings/sram/sram.yaml
+++ b/Documentation/devicetree/bindings/sram/sram.yaml
@@ -37,7 +37,9 @@ properties:
- qcom,eliza-imem
- qcom,glymur-imem
- qcom,hawi-imem
+ - qcom,ipq5332-imem
- qcom,ipq5424-imem
+ - qcom,ipq9574-imem
- qcom,kaanapali-imem
- qcom,maili-imem
- qcom,milos-imem
--
2.34.1
^ permalink raw reply [flat|nested] 6+ messages in thread* [PATCH v3 2/3] arm64: dts: qcom: ipq9574: add support to get watchdog bootstatus from IMEM
2026-10-19 16:46 [PATCH v3 0/3] Add support for reporting boot status on Qualcomm IPQ9574 and IPQ5332 Kathiravan Thirumoorthy
2026-10-19 16:46 ` [PATCH v3 1/3] dt-bindings: sram: Document IMEM found in Qualcomm's " Kathiravan Thirumoorthy
@ 2026-10-19 16:46 ` Kathiravan Thirumoorthy
2026-10-21 8:06 ` Konrad Dybcio
2026-10-19 16:46 ` [PATCH v3 3/3] arm64: dts: qcom: ipq5332: " Kathiravan Thirumoorthy
2 siblings, 1 reply; 6+ messages in thread
From: Kathiravan Thirumoorthy @ 2026-10-19 16:46 UTC (permalink / raw)
To: Rob Herring, Krzysztof Kozlowski, Conor Dooley, Bjorn Andersson,
Konrad Dybcio, Abel Vesa
Cc: devicetree, linux-kernel, linux-arm-msm, Kathiravan Thirumoorthy
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.
To achieve this, add the IMEM node. The overall IMEM region is 32KB but
only initial 4KB is accessible by all masters in the SoC.
Signed-off-by: Kathiravan Thirumoorthy <kathiravan.thirumoorthy@oss.qualcomm.com>
---
arch/arm64/boot/dts/qcom/ipq9574.dtsi | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/arch/arm64/boot/dts/qcom/ipq9574.dtsi b/arch/arm64/boot/dts/qcom/ipq9574.dtsi
index 771a59585645..e1908f01851d 100644
--- a/arch/arm64/boot/dts/qcom/ipq9574.dtsi
+++ b/arch/arm64/boot/dts/qcom/ipq9574.dtsi
@@ -757,6 +757,21 @@ usb_0_qmpphy: phy@7d000 {
status = "disabled";
};
+ sram@8600000 {
+ compatible = "qcom,ipq9574-imem", "mmio-sram";
+ reg = <0x08600000 0x8000>;
+ ranges = <0 0x08600000 0x8000>;
+
+ no-memory-wc;
+
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ restart_reason: restartreason-sram@7a4 {
+ reg = <0x7a4 0x4>;
+ };
+ };
+
usb3: usb@8af8800 {
compatible = "qcom,ipq9574-dwc3", "qcom,dwc3";
reg = <0x08af8800 0x400>;
@@ -847,6 +862,7 @@ 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
^ permalink raw reply [flat|nested] 6+ messages in thread* Re: [PATCH v3 2/3] arm64: dts: qcom: ipq9574: add support to get watchdog bootstatus from IMEM
2026-10-19 16:46 ` [PATCH v3 2/3] arm64: dts: qcom: ipq9574: add support to get watchdog bootstatus from IMEM Kathiravan Thirumoorthy
@ 2026-10-21 8:06 ` Konrad Dybcio
0 siblings, 0 replies; 6+ messages in thread
From: Konrad Dybcio @ 2026-10-21 8:06 UTC (permalink / raw)
To: Kathiravan Thirumoorthy, Rob Herring, Krzysztof Kozlowski,
Conor Dooley, Bjorn Andersson, Konrad Dybcio, Abel Vesa
Cc: devicetree, linux-kernel, linux-arm-msm
On 10/19/26 6:46 PM, Kathiravan Thirumoorthy wrote:
> 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.
>
> To achieve this, add the IMEM node. The overall IMEM region is 32KB but
> only initial 4KB is accessible by all masters in the SoC.
>
> Signed-off-by: Kathiravan Thirumoorthy <kathiravan.thirumoorthy@oss.qualcomm.com>
> ---
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Konrad
^ permalink raw reply [flat|nested] 6+ messages in thread
* [PATCH v3 3/3] arm64: dts: qcom: ipq5332: add support to get watchdog bootstatus from IMEM
2026-10-19 16:46 [PATCH v3 0/3] Add support for reporting boot status on Qualcomm IPQ9574 and IPQ5332 Kathiravan Thirumoorthy
2026-10-19 16:46 ` [PATCH v3 1/3] dt-bindings: sram: Document IMEM found in Qualcomm's " Kathiravan Thirumoorthy
2026-10-19 16:46 ` [PATCH v3 2/3] arm64: dts: qcom: ipq9574: add support to get watchdog bootstatus from IMEM Kathiravan Thirumoorthy
@ 2026-10-19 16:46 ` Kathiravan Thirumoorthy
2026-10-21 8:07 ` Konrad Dybcio
2 siblings, 1 reply; 6+ messages in thread
From: Kathiravan Thirumoorthy @ 2026-10-19 16:46 UTC (permalink / raw)
To: Rob Herring, Krzysztof Kozlowski, Conor Dooley, Bjorn Andersson,
Konrad Dybcio, Abel Vesa
Cc: devicetree, linux-kernel, linux-arm-msm, Kathiravan Thirumoorthy
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.
To achieve this, add the IMEM node. The overall IMEM region is 32KB but
only initial 4KB is accessible by all masters in the SoC.
Signed-off-by: Kathiravan Thirumoorthy <kathiravan.thirumoorthy@oss.qualcomm.com>
---
arch/arm64/boot/dts/qcom/ipq5332.dtsi | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/arch/arm64/boot/dts/qcom/ipq5332.dtsi b/arch/arm64/boot/dts/qcom/ipq5332.dtsi
index 74d9de8d7641..c1b083624696 100644
--- a/arch/arm64/boot/dts/qcom/ipq5332.dtsi
+++ b/arch/arm64/boot/dts/qcom/ipq5332.dtsi
@@ -493,6 +493,21 @@ qpic_nand: spi@79b0000 {
status = "disabled";
};
+ 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 {
compatible = "qcom,ipq5332-dwc3", "qcom,dwc3";
reg = <0x08af8800 0x400>;
@@ -578,6 +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
^ permalink raw reply [flat|nested] 6+ messages in thread* Re: [PATCH v3 3/3] arm64: dts: qcom: ipq5332: add support to get watchdog bootstatus from IMEM
2026-10-19 16:46 ` [PATCH v3 3/3] arm64: dts: qcom: ipq5332: " Kathiravan Thirumoorthy
@ 2026-10-21 8:07 ` Konrad Dybcio
0 siblings, 0 replies; 6+ messages in thread
From: Konrad Dybcio @ 2026-10-21 8:07 UTC (permalink / raw)
To: Kathiravan Thirumoorthy, Rob Herring, Krzysztof Kozlowski,
Conor Dooley, Bjorn Andersson, Konrad Dybcio, Abel Vesa
Cc: devicetree, linux-kernel, linux-arm-msm
On 10/19/26 6:46 PM, Kathiravan Thirumoorthy wrote:
> 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.
>
> To achieve this, add the IMEM node. The overall IMEM region is 32KB but
> only initial 4KB is accessible by all masters in the SoC.
>
> Signed-off-by: Kathiravan Thirumoorthy <kathiravan.thirumoorthy@oss.qualcomm.com>
> ---
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Konrad
^ permalink raw reply [flat|nested] 6+ messages in thread