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 24KB 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/ipq8074.dtsi | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/ipq8074.dtsi b/arch/arm64/boot/dts/qcom/ipq8074.dtsi
index 256e12cf6d54417582a8b50e061f40719a4004a1..086b34ba7b09d68e24d2c1da28f303357ce503ea 100644
--- a/arch/arm64/boot/dts/qcom/ipq8074.dtsi
+++ b/arch/arm64/boot/dts/qcom/ipq8074.dtsi
@@ -625,6 +625,17 @@ qpic_nand: nand-controller@79b0000 {
 			status = "disabled";
 		};
 
+		sram@8600000 {
+			compatible = "qcom,ipq8074-imem", "mmio-sram";
+			reg = <0x08600000 0x6000>;
+			ranges = <0 0x08600000 0x6000>;
+
+			no-memory-wc;
+
+			#address-cells = <1>;
+			#size-cells = <1>;
+		};
+
 		usb_0: usb@8af8800 {
 			compatible = "qcom,ipq8074-dwc3", "qcom,dwc3";
 			reg = <0x08af8800 0x400>;

-- 
2.34.1

On Sat, Feb 28, 2026 at 06:38:01PM +0530, Kathiravan Thirumoorthy wrote:
> 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 24KB 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/ipq8074.dtsi | 11 +++++++++++
>  1 file changed, 11 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/ipq8074.dtsi b/arch/arm64/boot/dts/qcom/ipq8074.dtsi
> index 256e12cf6d54417582a8b50e061f40719a4004a1..086b34ba7b09d68e24d2c1da28f303357ce503ea 100644
> --- a/arch/arm64/boot/dts/qcom/ipq8074.dtsi
> +++ b/arch/arm64/boot/dts/qcom/ipq8074.dtsi
> @@ -625,6 +625,17 @@ qpic_nand: nand-controller@79b0000 {
>  			status = "disabled";
>  		};
>  
> +		sram@8600000 {
> +			compatible = "qcom,ipq8074-imem", "mmio-sram";
> +			reg = <0x08600000 0x6000>;
> +			ranges = <0 0x08600000 0x6000>;

Nope.

> +
> +			no-memory-wc;
> +
> +			#address-cells = <1>;
> +			#size-cells = <1>;

Nope. These are completely redundant and not needed. Post complete DTS
so you will see how your DTS and binding DO NOT WORK. Posting half-baked
code gives you opposite impression - that it is working...

Best regards,
Krzysztof