[PATCH v2 4/4] dt-bindings: bus: add documentation for Aspeed AHBC

[Neal Liu <neal_liu@aspeedtech.com>]

Add device tree binding documentation for the Aspeed
Advanced High-Performance Bus (AHB) Controller.

Signed-off-by: Neal Liu <neal_liu@aspeedtech.com>
---
 .../bindings/bus/aspeed,ast2600-ahbc.yaml     | 46 +++++++++++++++++++
 1 file changed, 46 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/bus/aspeed,ast2600-ahbc.yaml

diff --git a/Documentation/devicetree/bindings/bus/aspeed,ast2600-ahbc.yaml b/Documentation/devicetree/bindings/bus/aspeed,ast2600-ahbc.yaml
new file mode 100644
index 000000000000..c42a350d30a1
--- /dev/null
+++ b/Documentation/devicetree/bindings/bus/aspeed,ast2600-ahbc.yaml
@@ -0,0 +1,46 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/bus/aspeed,ast2600-ahbc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: ASPEED Advanced High-Performance Bus Controller (AHBC) Device Tree Bindings
+
+maintainers:
+  - Neal Liu <neal_liu@aspeedtech.com>
+  - Chia-Wei Wang <chiawei_wang@aspeedtech.com>
+
+description: |
+  Advanced High-performance Bus Controller (AHBC) supports plenty of mechanisms
+  including a priority arbiter, an address decoder and a data multiplexer
+  to control the overall operations of Advanced High-performance
+  Bus (AHB). AHB is the main system bus for ARM CPU to communicate with the
+  related peripherals.
+
+properties:
+  compatible:
+    enum:
+      - aspeed,ast2600-ahbc
+
+  reg:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    bus {
+        compatible = "simple-bus";
+        #address-cells = <1>;
+        #size-cells = <1>;
+        ranges;
+
+        ahbc: bus@1e600000 {
+            compatible = "aspeed,ast2600-ahbc";
+            reg = <0x1e600000 0x100>;
+        };
+    };
-- 
2.25.1