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+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/input/allwinner,sun4i-a10-lradc-keys.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Allwinner A10 LRADC Device Tree Bindings
+
+maintainers:
+ - Chen-Yu Tsai <wens@csie.org>
+ - Maxime Ripard <mripard@kernel.org>
+
+properties:
+ compatible:
+ oneOf:
+ - const: allwinner,sun4i-a10-lradc-keys
+ - const: allwinner,sun8i-a83t-r-lradc
+ - items:
+ - const: allwinner,sun50i-a64-lradc
+ - const: allwinner,sun8i-a83t-r-lradc
+
+ reg:
+ maxItems: 1
+
+ interrupts:
+ maxItems: 1
+
+ vref-supply:
+ description:
+ Regulator for the LRADC reference voltage
+
+patternProperties:
+ "^button-[0-9]+$":
+ type: object
+ properties:
+ label:
+ $ref: /schemas/types.yaml#/definitions/string
+ description: Descriptive name of the key
+
+ linux,code:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description: Keycode to emit
+
+ channel:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ enum: [0, 1]
+ description: ADC Channel this key is attached to
+
+ voltage:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description:
+ Voltage in microvolts at LRADC input when this key is
+ pressed
+
+ required:
+ - label
+ - linux,code
+ - channel
+ - voltage
+
+ additionalProperties: false
+
+required:
+ - compatible
+ - reg
+ - interrupts
+ - vref-supply
+
+additionalProperties: false
+
+examples:
+ - |
+ lradc: lradc@1c22800 {
+ compatible = "allwinner,sun4i-a10-lradc-keys";
+ reg = <0x01c22800 0x100>;
+ interrupts = <31>;
+ vref-supply = <&reg_vcc3v0>;
+
+ button-191 {
+ label = "Volume Up";
+ linux,code = <115>;
+ channel = <0>;
+ voltage = <191274>;
+ };
+
+ button-392 {
+ label = "Volume Down";
+ linux,code = <114>;
+ channel = <0>;
+ voltage = <392644>;
+ };
+ };
+
+...