Even though we've used the CPU configuration driver for some time and a
number of boards using it already, we never had a binding for it. Let's
add it based on what the driver expects and the boards are providing.

Reviewed-by: Rob Herring <r...@kernel.org>
Signed-off-by: Maxime Ripard <max...@cerno.tech>
---
 .../sunxi/allwinner,sun6i-a31-cpuconfig.yaml  | 38 +++++++++++++++++++
 1 file changed, 38 insertions(+)
 create mode 100644 
Documentation/devicetree/bindings/arm/sunxi/allwinner,sun6i-a31-cpuconfig.yaml

diff --git 
a/Documentation/devicetree/bindings/arm/sunxi/allwinner,sun6i-a31-cpuconfig.yaml
 
b/Documentation/devicetree/bindings/arm/sunxi/allwinner,sun6i-a31-cpuconfig.yaml
new file mode 100644
index 000000000000..f3878e0b3cc4
--- /dev/null
+++ 
b/Documentation/devicetree/bindings/arm/sunxi/allwinner,sun6i-a31-cpuconfig.yaml
@@ -0,0 +1,38 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: 
http://devicetree.org/schemas/arm/sunxi/allwinner,sun6i-a31-cpuconfig.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Allwinner CPU Configuration Controller Device Tree Bindings
+
+maintainers:
+  - Chen-Yu Tsai <w...@csie.org>
+  - Maxime Ripard <mrip...@kernel.org>
+
+properties:
+  compatible:
+    enum:
+      - allwinner,sun6i-a31-cpuconfig
+      - allwinner,sun8i-a23-cpuconfig
+      - allwinner,sun8i-a83t-cpucfg
+      - allwinner,sun8i-a83t-r-cpucfg
+      - allwinner,sun9i-a80-cpucfg
+
+  reg:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+      cpucfg@1f01c00 {
+          compatible = "allwinner,sun6i-a31-cpuconfig";
+          reg = <0x01f01c00 0x300>;
+      };
+
+...
-- 
2.31.1

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