Squashed 'dts/upstream/' content from commit aaba2d45dc2a

git-subtree-dir: dts/upstream
git-subtree-split: aaba2d45dc2a1b3bbb710f2a3808ee1c9f340abe
diff --git a/Bindings/net/mdio-gpio.yaml b/Bindings/net/mdio-gpio.yaml
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+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/net/mdio-gpio.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: MDIO on GPIOs
+
+maintainers:
+  - Andrew Lunn <andrew@lunn.ch>
+  - Heiner Kallweit <hkallweit1@gmail.com>
+  - Russell King <linux@armlinux.org.uk>
+
+allOf:
+  - $ref: mdio.yaml#
+
+properties:
+  compatible:
+    enum:
+      - virtual,mdio-gpio
+      - microchip,mdio-smi0
+
+  "#address-cells":
+    const: 1
+
+  "#size-cells":
+    const: 0
+
+  gpios:
+    minItems: 2
+    items:
+      - description: MDC
+      - description: MDIO
+      - description: MDO
+
+# Note: Each gpio-mdio bus should have an alias correctly numbered in "aliases"
+# node.
+additionalProperties:
+  type: object
+
+examples:
+  - |
+    aliases {
+        mdio-gpio0 = &mdio0;
+    };
+
+    mdio0: mdio {
+      compatible = "virtual,mdio-gpio";
+      #address-cells = <1>;
+      #size-cells = <0>;
+      gpios = <&qe_pio_a 11>,
+              <&qe_pio_c 6>;
+      ethphy0: ethernet-phy@0 {
+        reg = <0>;
+      };
+    };
+...