[PATCH 02/10] dt-bindings: soc: add Ambarella secure scratchpad

Document the Ambarella secure scratchpad syscon used by CV75.

Signed-off-by: Long Zhao <[email protected]>
---
 .../ambarella/ambarella,sec-scratchpad.yaml   | 41 +++++++++++++++++++
 1 file changed, 41 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/soc/ambarella/ambarella,sec-scratchpad.yaml

diff --git a/Documentation/devicetree/bindings/soc/ambarella/ambarella,sec-scratchpad.yaml b/Documentation/devicetree/bindings/soc/ambarella/ambarella,sec-scratchpad.yaml
new file mode 100644
index 000000000000..2cca277674f7
--- /dev/null
+++ b/Documentation/devicetree/bindings/soc/ambarella/ambarella,sec-scratchpad.yaml
@@ -0,0 +1,41 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/soc/ambarella/ambarella,sec-scratchpad.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Ambarella Secure Scratchpad Registers
+
+maintainers:
+  - Long Zhao <[email protected]>
+
+description:
+  The secure scratchpad block contains shared system registers used by
+  other Ambarella SoC blocks through syscon regmap lookups.
+
+allOf:
+  - $ref: /schemas/mfd/syscon-common.yaml#
+
+properties:
+  compatible:
+    items:
+      - const: ambarella,cv75-sec-scratchpad
+      - const: ambarella,sec-scratchpad
+      - const: syscon
+
+  reg:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    scratchpad@e002e000 {
+        compatible = "ambarella,cv75-sec-scratchpad",
+                     "ambarella,sec-scratchpad", "syscon";
+        reg = <0xe002e000 0x1000>;
+    };
--
2.34.1

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