Documentation/devicetree/bindings/input/allwinner,sun4i-a10-lradc-keys.yaml

   1 # SPDX-License-Identifier: GPL-2.0
   2 %YAML 1.2
   3 ---
   4 $id: http://devicetree.org/schemas/input/allwinner,sun4i-a10-lradc-keys.yaml#
   5 $schema: http://devicetree.org/meta-schemas/core.yaml#
   6
   7 title: Allwinner A10 LRADC Device Tree Bindings
   8
   9 maintainers:
  10   - Chen-Yu Tsai <wens@csie.org>
  11   - Maxime Ripard <mripard@kernel.org>
  12
  13 properties:
  14   compatible:
  15     oneOf:
  16       - const: allwinner,sun4i-a10-lradc-keys
  17       - const: allwinner,sun8i-a83t-r-lradc
  18       - items:
  19           - const: allwinner,sun50i-a64-lradc
  20           - const: allwinner,sun8i-a83t-r-lradc
  21
  22   reg:
  23     maxItems: 1
  24
  25   interrupts:
  26     maxItems: 1
  27
  28   vref-supply:
  29     description:
  30       Regulator for the LRADC reference voltage
  31
  32   wakeup-source: true
  33
  34 patternProperties:
  35   "^button-[0-9]+$":
  36     type: object
  37     properties:
  38       label:
  39         $ref: /schemas/types.yaml#/definitions/string
  40         description: Descriptive name of the key
  41
  42       linux,code:
  43         $ref: /schemas/types.yaml#/definitions/uint32
  44         description: Keycode to emit
  45
  46       channel:
  47         $ref: /schemas/types.yaml#/definitions/uint32
  48         enum: [0, 1]
  49         description: ADC Channel this key is attached to
  50
  51       voltage:
  52         $ref: /schemas/types.yaml#/definitions/uint32
  53         description:
  54           Voltage in microvolts at LRADC input when this key is
  55           pressed
  56
  57     required:
  58       - label
  59       - linux,code
  60       - channel
  61       - voltage
  62
  63     additionalProperties: false
  64
  65 required:
  66   - compatible
  67   - reg
  68   - interrupts
  69   - vref-supply
  70
  71 additionalProperties: false
  72
  73 examples:
  74   - |
  75     lradc: lradc@1c22800 {
  76         compatible = "allwinner,sun4i-a10-lradc-keys";
  77         reg = <0x01c22800 0x100>;
  78         interrupts = <31>;
  79         vref-supply = <&reg_vcc3v0>;
  80
  81         button-191 {
  82             label = "Volume Up";
  83             linux,code = <115>;
  84             channel = <0>;
  85             voltage = <191274>;
  86         };
  87
  88         button-392 {
  89             label = "Volume Down";
  90             linux,code = <114>;
  91             channel = <0>;
  92             voltage = <392644>;
  93         };
  94     };
  95
  96 ...