make a binding for the various boards based on the
AppliedMicro/APM APM82181 SoC.

Signed-off-by: Christian Lamparter <redacted>
---
 .../bindings/powerpc/4xx/apm,apm82181.yaml    | 29 +++++++++++++++++++
 1 file changed, 29 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/powerpc/4xx/apm,apm82181.yaml

diff --git a/Documentation/devicetree/bindings/powerpc/4xx/apm,apm82181.yaml b/Documentation/devicetree/bindings/powerpc/4xx/apm,apm82181.yaml
new file mode 100644
index 000000000000..03a3c02fe920
--- /dev/null
+++ b/Documentation/devicetree/bindings/powerpc/4xx/apm,apm82181.yaml

@@ -0,0 +1,29 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/powerpc/4xx/apm,apm82181.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: APM APM82181 device tree bindings
+
+description:
+  AppliedMicro APM82181 Wi-Fi/network SoCs based
+  on the PPC464-CPU architecture.
+
+maintainers:
+  - Christian Lamparter <chunkeey@gmail.com>
+
+properties:
+  $nodename:
+    const: '/'
+  compatible:
+    oneOf:
+      - description: APM82181 based boards
+        items:
+          - enum:
+              - apm,bluestone
+              - meraki,mr24
+              - wd,mybooklive
+          - const: amcc,apm82181