[net-next RFC PATCH 1/2] dt-bindings: net: Document support for Airoha AN7583 MDIO Controller

[Christian Marangi <ansuelsmth@gmail.com>]

Airoha AN7583 SoC have 3 different MDIO Controller. One comes from
the intergated Switch based on MT7530. The other 2 live under the SCU
register and expose 2 dedicated MDIO controller.

Document the schema that expose the 2 dedicated MDIO controller.
Each MDIO controller can be independently reset with the SoC reset line.

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
---
 .../bindings/net/airoha,an7583-mdio.yaml      | 78 +++++++++++++++++++
 1 file changed, 78 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/net/airoha,an7583-mdio.yaml

diff --git a/Documentation/devicetree/bindings/net/airoha,an7583-mdio.yaml b/Documentation/devicetree/bindings/net/airoha,an7583-mdio.yaml
new file mode 100644
index 000000000000..2375f1bf85a2
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/airoha,an7583-mdio.yaml
@@ -0,0 +1,78 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/net/airoha,an7583-mdio.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Airoha AN7583 Dedicated MDIO Controller
+
+maintainers:
+  - Christian Marangi <ansuelsmth@gmail.com>
+
+description:
+  Airoha AN7583 SoC have 3 different MDIO Controller.
+
+  One comes from the intergated Switch based on MT7530.
+
+  The other 2 (that this schema describe) live under the SCU
+  register supporting both C22 and C45 PHYs.
+
+properties:
+  compatible:
+    const: airoha,an7583-mdio
+
+  "#address-cells":
+    const: 1
+
+  "#size-cells":
+    const: 0
+
+patternProperties:
+  '^mdio(-(bus|external))@[0-1]$':
+    type: object
+
+    $ref: mdio.yaml#
+
+    properties:
+      reg:
+        minimum: 0
+        maximum: 1
+
+      resets:
+        maxItems: 1
+
+    required:
+      - reg
+
+    unevaluatedProperties: false
+
+required:
+  - compatible
+  - "#address-cells"
+  - "#size-cells"
+
+additionalProperties: false
+
+examples:
+  - |
+    mdio-controller {
+        compatible = "airoha,an7583-mdio";
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        mdio-bus@0 {
+            reg = <0>;
+            #address-cells = <1>;
+            #size-cells = <0>;
+
+            ethernet-phy@1f {
+                reg = <31>;
+            };
+        };
+
+        mdio-bus@1 {
+            reg = <1>;
+            #address-cells = <1>;
+            #size-cells = <0>;
+        };
+    };
-- 
2.48.1