[PATCH RFC 4/6] dt-bindings: sram: qcom,imem: add the support for restart reason

[Kathiravan Thirumoorthy <kathiravan.thirumoorthy@oss.qualcomm.com>]

In the Qualcomm IPQ SoCs, system restart reason is captured in the IMEM
location by bootloaders and Linux populates this information to the
userspace. Add a child node for the restart reason in the IMEM region.

Signed-off-by: Kathiravan Thirumoorthy <kathiravan.thirumoorthy@oss.qualcomm.com>
---
 .../devicetree/bindings/sram/qcom,imem.yaml        | 24 ++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/Documentation/devicetree/bindings/sram/qcom,imem.yaml b/Documentation/devicetree/bindings/sram/qcom,imem.yaml
index dec1b1ee924cf1386f559eb262ea864f2788c165..c3dab5fbc88c1515bfb3585f18aed9e01ae36fe4 100644
--- a/Documentation/devicetree/bindings/sram/qcom,imem.yaml
+++ b/Documentation/devicetree/bindings/sram/qcom,imem.yaml
@@ -56,6 +56,10 @@ patternProperties:
     $ref: /schemas/remoteproc/qcom,pil-info.yaml#
     description: Peripheral image loader relocation region
 
+  "^restart-reason@[0-9a-f]+$":
+    $ref: /schemas/watchdog/qcom,restart-reason.yaml#
+    description: IPQ SoC restart reason region
+
 required:
   - compatible
   - reg
@@ -82,3 +86,23 @@ examples:
             };
         };
     };
+
+  - |
+    soc {
+        #address-cells = <2>;
+        #size-cells = <2>;
+
+        sram@8600000 {
+            compatible = "qcom,ipq5424-imem", "syscon", "simple-mfd";
+            reg = <0 0x08600000 0 0x1000>;
+            ranges = <0 0 0x08600000 0x1000>;
+
+            #address-cells = <1>;
+            #size-cells = <1>;
+
+            restart-reason@7b0 {
+                compatible = "qcom,restart-reason-info";
+                reg = <0x7b0 0x4>;
+            };
+        };
+    };

-- 
2.34.1