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+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/clock/fixed-mmio-clock.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Binding for simple memory mapped IO fixed-rate clock sources
+
+description:
+ This binding describes a fixed-rate clock for which the frequency can
+ be read from a single 32-bit memory mapped I/O register.
+
+ It was designed for test systems, like FPGA, not for complete,
+ finished SoCs.
+
+maintainers:
+ - Jan Kotas <jank@cadence.com>
+
+properties:
+ compatible:
+ const: fixed-mmio-clock
+
+ reg:
+ maxItems: 1
+
+ "#clock-cells":
+ const: 0
+
+ clock-output-names:
+ maxItems: 1
+
+required:
+ - compatible
+ - reg
+ - "#clock-cells"
+
+additionalProperties: false
+
+examples:
+ - |
+ sysclock: sysclock@fd020004 {
+ compatible = "fixed-mmio-clock";
+ #clock-cells = <0>;
+ reg = <0xfd020004 0x4>;
+ clock-output-names = "sysclk";
+ };
+...