[PATCH v4 1/2] dt-bindings: input: Add Dell Wyse 3020 Power Button binding

[Lubomir Rintel]

Add binding document for the Dell Wyse 3020 a.k.a. "Ariel" Power Button.

Signed-off-by: Lubomir Rintel <lkundrak@xxxxx>
Reviewed-by: Rob Herring <robh@xxxxxxxxxx>

---
Changes since v3:
(Based on warnings from Rob's validation bot)
- Specify additionalProperties: false
- Allow using spi-max-frequency property

Changes since v1:
- Collect Rob's R-b

 .../bindings/input/ariel-pwrbutton.yaml       | 57 +++++++++++++++++++
 1 file changed, 57 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/input/ariel-pwrbutton.yaml

diff --git a/Documentation/devicetree/bindings/input/ariel-pwrbutton.yaml b/Documentation/devicetree/bindings/input/ariel-pwrbutton.yaml
new file mode 100644
index 0000000000000..b4ad829d73838
--- /dev/null
+++ b/Documentation/devicetree/bindings/input/ariel-pwrbutton.yaml
@@ -0,0 +1,57 @@
+# SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/input/ariel-pwrbutton.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Dell Wyse 3020 a.k.a. "Ariel" Power Button
+
+maintainers:
+  - Lubomir Rintel <lkundrak@xxxxx>
+
+description: |
+  The ENE Embedded Controller on the Ariel board has an interface to the
+  SPI bus that is capable of sending keyboard and mouse data. A single
+  power button is attached to it. This binding describes this
+  configuration.
+
+allOf:
+  - $ref: input.yaml#
+
+properties:
+  compatible:
+    items:
+      - const: dell,wyse-ariel-ec-input
+      - const: ene,kb3930-input
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  spi-max-frequency: true
+
+required:
+  - compatible
+  - reg
+  - interrupts
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    spi {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        power-button@0 {
+            compatible = "dell,wyse-ariel-ec-input", "ene,kb3930-input";
+            reg = <0>;
+            interrupt-parent = <&gpio>;
+            interrupts = <60 IRQ_TYPE_EDGE_RISING>;
+            spi-max-frequency = <33000000>;
+        };
+    };
-- 
2.28.0