[PATCH 0/5] Add support for reporting boot status on Qualcomm IPQ9574 and IPQ5332

[PATCH 0/5] Add support for reporting boot status on Qualcomm IPQ9574 and IPQ5332

[Kathiravan Thirumoorthy]

Similar to IPQ5424, add the IMEM node and the restart-reason child node
on IPQ9574 and IPQ5332 to enable reporting of watchdog boot status.

Signed-off-by: Kathiravan Thirumoorthy <kathiravan.thirumoorthy@oss.qualcomm.com>
---
Kathiravan Thirumoorthy (5):
      dt-bindings: sram: Document IMEM found in Qualcomm's IPQ9574 and IPQ5332
      arm64: dts: qcom: ipq9574: add the IMEM node
      arm64: dts: qcom: ipq5332: add the IMEM node
      arm64: dts: qcom: ipq9574: add support to get watchdog bootstatus from IMEM
      arm64: dts: qcom: ipq5332: add support to get watchdog bootstatus from IMEM

 Documentation/devicetree/bindings/sram/sram.yaml |  2 ++
 arch/arm64/boot/dts/qcom/ipq5332.dtsi            | 16 ++++++++++++++++
 arch/arm64/boot/dts/qcom/ipq9574.dtsi            | 16 ++++++++++++++++
 3 files changed, 34 insertions(+)
---
base-commit: 6c2cb8b8b843d216ab549b678a0d8831c43153e0
change-id: 20260929-imem_restart_reason-15c5b95f9a5a

Best regards,
--  
Kathiravan Thirumoorthy <kathiravan.thirumoorthy@oss.qualcomm.com>

[PATCH 1/5] dt-bindings: sram: Document IMEM found in Qualcomm's IPQ9574 and IPQ5332

[Kathiravan Thirumoorthy]

Document the compatibles for the IMEM found in the Qualcomm's IPQ9574
and IPQ5332 SoCs.

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..d65696885e6a 100644
--- a/Documentation/devicetree/bindings/sram/sram.yaml
+++ b/Documentation/devicetree/bindings/sram/sram.yaml
@@ -37,6 +37,8 @@ properties:
         - qcom,eliza-imem
         - qcom,glymur-imem
         - qcom,hawi-imem
+        - qcom,ipq9574-imem
+        - qcom,ipq5332-imem
         - qcom,ipq5424-imem
         - qcom,kaanapali-imem
         - qcom,maili-imem

-- 
2.34.1

[PATCH 2/5] arm64: dts: qcom: ipq9574: add the IMEM node

[Kathiravan Thirumoorthy]

Add the IMEM node to the device tree to extract debugging information
like system restart reason, which is populated via IMEM. Define the
IMEM region to enable this functionality.

As described, 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 | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/ipq9574.dtsi b/arch/arm64/boot/dts/qcom/ipq9574.dtsi
index 771a59585645..f7cc6f274ca9 100644
--- a/arch/arm64/boot/dts/qcom/ipq9574.dtsi
+++ b/arch/arm64/boot/dts/qcom/ipq9574.dtsi
@@ -757,6 +757,13 @@ usb_0_qmpphy: phy@7d000 {
 			status = "disabled";
 		};
 
+		sram@8600000 {
+			compatible = "qcom,ipq9574-imem", "mmio-sram";
+			reg = <0x08600000 0x8000>;
+
+			no-memory-wc;
+		};
+
 		usb3: usb@8af8800 {
 			compatible = "qcom,ipq9574-dwc3", "qcom,dwc3";
 			reg = <0x08af8800 0x400>;

-- 
2.34.1

[PATCH 3/5] arm64: dts: qcom: ipq5332: add the IMEM node

[Kathiravan Thirumoorthy]

Add the IMEM node to the device tree to extract debugging information
like system restart reason, which is populated via IMEM. Define the
IMEM region to enable this functionality.

As described, overall IMEM region is 80KB 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 | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/ipq5332.dtsi b/arch/arm64/boot/dts/qcom/ipq5332.dtsi
index 74d9de8d7641..3e10f45e182e 100644
--- a/arch/arm64/boot/dts/qcom/ipq5332.dtsi
+++ b/arch/arm64/boot/dts/qcom/ipq5332.dtsi
@@ -493,6 +493,13 @@ qpic_nand: spi@79b0000 {
 			status = "disabled";
 		};
 
+		sram@8600000 {
+			compatible = "qcom,ipq5332-imem", "mmio-sram";
+			reg = <0x08600000 0x14000>;
+
+			no-memory-wc;
+		};
+
 		usb: usb@8af8800 {
 			compatible = "qcom,ipq5332-dwc3", "qcom,dwc3";
 			reg = <0x08af8800 0x400>;

-- 
2.34.1

[PATCH 4/5] arm64: dts: qcom: ipq9574: add support to get watchdog bootstatus from IMEM

[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.

Signed-off-by: Kathiravan Thirumoorthy <kathiravan.thirumoorthy@oss.qualcomm.com>
---
 arch/arm64/boot/dts/qcom/ipq9574.dtsi | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/ipq9574.dtsi b/arch/arm64/boot/dts/qcom/ipq9574.dtsi
index f7cc6f274ca9..2156911876cc 100644
--- a/arch/arm64/boot/dts/qcom/ipq9574.dtsi
+++ b/arch/arm64/boot/dts/qcom/ipq9574.dtsi
@@ -760,8 +760,16 @@ usb_0_qmpphy: phy@7d000 {
 		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@7b0 {
+				reg = <0x7a4 0x4>;
+			};
 		};
 
 		usb3: usb@8af8800 {
@@ -854,6 +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

[PATCH 5/5] arm64: dts: qcom: ipq5332: add support to get watchdog bootstatus from IMEM

[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.

Signed-off-by: Kathiravan Thirumoorthy <kathiravan.thirumoorthy@oss.qualcomm.com>
---
 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..6a54a548b4f8 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@7b0 {
+				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

Re: [PATCH 1/5] dt-bindings: sram: Document IMEM found in Qualcomm's IPQ9574 and IPQ5332

[Krzysztof Kozlowski]

On Thu, Oct 01, 2026 at 08:41:11PM +0530, Kathiravan Thirumoorthy wrote:
> Document the compatibles for the IMEM found in the Qualcomm's IPQ9574
> and IPQ5332 SoCs.
> 
> 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..d65696885e6a 100644
> --- a/Documentation/devicetree/bindings/sram/sram.yaml
> +++ b/Documentation/devicetree/bindings/sram/sram.yaml
> @@ -37,6 +37,8 @@ properties:
>          - qcom,eliza-imem
>          - qcom,glymur-imem
>          - qcom,hawi-imem
> +        - qcom,ipq9574-imem

Why reversed order?

> +        - qcom,ipq5332-imem

Best regards,
Krzysztof

Re: [PATCH 1/5] dt-bindings: sram: Document IMEM found in Qualcomm's IPQ9574 and IPQ5332

[Kathiravan Thirumoorthy]

On 10/2/2026 3:11 PM, Krzysztof Kozlowski wrote:
> On Thu, Oct 01, 2026 at 08:41:11PM +0530, Kathiravan Thirumoorthy wrote:
>> Document the compatibles for the IMEM found in the Qualcomm's IPQ9574
>> and IPQ5332 SoCs.
>>
>> 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..d65696885e6a 100644
>> --- a/Documentation/devicetree/bindings/sram/sram.yaml
>> +++ b/Documentation/devicetree/bindings/sram/sram.yaml
>> @@ -37,6 +37,8 @@ properties:
>>           - qcom,eliza-imem
>>           - qcom,glymur-imem
>>           - qcom,hawi-imem
>> +        - qcom,ipq9574-imem
> Why reversed order?

My bad! Fixed it in v2.

>
>> +        - qcom,ipq5332-imem
> Best regards,
> Krzysztof
>