[PATCH 1/3] dt-bindings: soc/reset: ti: add binding for k3 platforms reset module

[A. Sverdlin]

From: Alexander Sverdlin <alexander.sverdlin@xxxxxxxxxxx>

Add DT binding for Texas Instruments K3 Multicore SoC platforms reset
module present on AM64x and newer members of the K3 family and consists of
the RST_CTRL, RST_STAT, RST_SRC and RST_MAGIC_WORD registers.

The planned usage is to provide reset reason information.

Signed-off-by: Alexander Sverdlin <alexander.sverdlin@xxxxxxxxxxx>
---
 .../bindings/reset/ti,am64-rst.yaml           | 39 +++++++++++++++++++
 .../soc/ti/ti,j721e-system-controller.yaml    | 11 ++++++
 2 files changed, 50 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/reset/ti,am64-rst.yaml

diff --git a/Documentation/devicetree/bindings/reset/ti,am64-rst.yaml b/Documentation/devicetree/bindings/reset/ti,am64-rst.yaml
new file mode 100644
index 0000000000000..5a17cee9c6528
--- /dev/null
+++ b/Documentation/devicetree/bindings/reset/ti,am64-rst.yaml
@@ -0,0 +1,39 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/reset/ti,am64-rst.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Texas Instruments K3 Multicore SoC platforms reset module
+
+maintainers:
+  - Alexander Sverdlin <alexander.sverdlin@xxxxxxxxx>
+
+description: |
+  Texas Instruments (ARM64) K3 Multicore SoC platforms reset module is present
+  on AM64x and newer members of the K3 family and consists of the RST_CTRL,
+  RST_STAT, RST_SRC and RST_MAGIC_WORD registers.
+
+properties:
+  $nodename:
+    pattern: "^rst@[0-9a-f]+$"
+
+  compatible:
+    items:
+      - const: ti,am64-rst
+
+  reg:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    rst@43018170 {
+        compatible = "ti,am64-rst";
+        reg = <0x43018170 0x10>;
+    };
diff --git a/Documentation/devicetree/bindings/soc/ti/ti,j721e-system-controller.yaml b/Documentation/devicetree/bindings/soc/ti/ti,j721e-system-controller.yaml
index f3bd0be3b279f..a2071a1668f96 100644
--- a/Documentation/devicetree/bindings/soc/ti/ti,j721e-system-controller.yaml
+++ b/Documentation/devicetree/bindings/soc/ti/ti,j721e-system-controller.yaml
@@ -86,6 +86,12 @@ patternProperties:
     description:
       This is the DSS OLDI CTRL region.
 
+  "^rst@[0-9a-f]+$":
+    type: object
+    $ref: /schemas/reset/ti,am64-rst.yaml#
+    description:
+      The node corresponding to SoC reset module.
+
 required:
   - compatible
   - reg
@@ -133,5 +139,10 @@ examples:
             compatible = "ti,j784s4-pcie-ctrl", "syscon";
             reg = <0x4070 0x4>;
         };
+
+        rst@18170 {
+            compatible = "ti,am64-rst";
+            reg = <0x18170 0x10>;
+        };
     };
 ...
-- 
2.52.0