diff --git a/Documentation/devicetree/bindings/net/x-powers,ac200-ephy-ctl.yaml b/Documentation/devicetree/bindings/net/x-powers,ac200-ephy-ctl.yaml
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+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/net/x-powers,ac200-ephy-ctl.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: X-Powers AC200 Ethernet PHY control
+
+maintainers:
+  - James Hilliard <james.hilliard1@gmail.com>
+
+description:
+  The AC200 Ethernet PHY control function configures and powers the Fast
+  Ethernet PHY in the AC200. Its registers are accessed through the parent
+  AC200 I2C regmap.
+
+properties:
+  compatible:
+    const: x-powers,ac200-ephy-ctl
+
+  nvmem-cells:
+    maxItems: 1
+    description:
+      Optional SoC SID cell containing the Ethernet PHY calibration value
+      written to the AC200 BPS_EFFUSE field after adding 3 modulo 16, as
+      prescribed by the vendor initialization sequence. If omitted, the
+      driver reads the AC200's internal copy of the calibration eFuse.
+
+  nvmem-cell-names:
+    const: calibration
+
+  phy-mode:
+    enum:
+      - mii
+      - rmii
+
+required:
+  - compatible
+  - phy-mode
+
+dependentRequired:
+  nvmem-cells: [ nvmem-cell-names ]
+  nvmem-cell-names: [ nvmem-cells ]
+
+additionalProperties: false
+...