[PATCH v4 3/5] dt-bindings: bus: Add STM32 ETZPC firewall controller

[Benjamin Gaignard]

Document STM32 ETZPC firewall controller bindings

Signed-off-by: Benjamin Gaignard <benjamin.gaignard@xxxxxx>
---
 .../bindings/bus/stm32/st,stm32-etzpc.yaml         | 46 ++++++++++++++++++++++
 1 file changed, 46 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/bus/stm32/st,stm32-etzpc.yaml

diff --git a/Documentation/devicetree/bindings/bus/stm32/st,stm32-etzpc.yaml b/Documentation/devicetree/bindings/bus/stm32/st,stm32-etzpc.yaml
new file mode 100644
index 000000000000..d92865fda40c
--- /dev/null
+++ b/Documentation/devicetree/bindings/bus/stm32/st,stm32-etzpc.yaml
@@ -0,0 +1,46 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/bus/stm32/st,stm32-etzpc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: STM32 Extended TrustZone Protection controller
+
+maintainers:
+  - Benjamin Gaignard <benjamin.gaignard@xxxxxx>
+
+description: STMicroelectronics's STM32 firewall bus controller implementation
+
+allOf:
+  - $ref: "firewall-provider.yaml#"
+  - $ref: /schemas/simple-bus.yaml#
+
+properties:
+  compatible:
+    contains:
+      enum:
+        - st,stm32-etzpc-bus
+
+  reg:
+   maxItems: 1
+
+  '#firewall-cells':
+    const: 2
+
+required:
+  - compatible
+  - reg
+  - '#firewall-cells'
+
+examples:
+  - |
+    soc@5c007000 {
+      compatible = "st,stm32-etzpc-bus", "simple-bus";
+      reg = <0x5c007000 0x400>;
+      #firewall-cells = <2>;
+      #address-cells = <1>;
+      #size-cells = <1>;
+      ranges;
+    };
+
+...
-- 
2.15.0