resistive-adc-touch.yaml

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    1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
    2 %YAML 1.2
    3 ---
    4 $id: http://devicetree.org/schemas/input/touchscreen/resistive-adc-touch.yaml#
    5 $schema: http://devicetree.org/meta-schemas/core.yaml#
    6 
    7 title: Generic resistive touchscreen ADC
    8 
    9 maintainers:
   10   - Oleksij Rempel <o.rempel@pengutronix.de>
   11 
   12 description: |
   13   Generic ADC based resistive touchscreen controller
   14   The device must be connected to an ADC device that provides channels for
   15   position measurement and optional pressure.
   16 
   17 allOf:
   18   - $ref: touchscreen.yaml#
   19 
   20 properties:
   21   compatible:
   22     const: resistive-adc-touch
   23 
   24   io-channels:
   25     minItems: 2
   26     items:
   27       - description: x
   28       - description: y
   29       - description: pressure (optional)
   30       - description: z1 (optional)
   31       - description: z2 (optional)
   32 
   33   io-channel-names:
   34     oneOf:
   35       - items:
   36           - enum: [x, y]
   37           - enum: [x, y]
   38       - items:
   39           - enum: [x, y, pressure]
   40           - enum: [x, y, pressure]
   41           - enum: [x, y, pressure]
   42       - items:
   43           - enum: [x, y, z1, z2]
   44           - enum: [x, y, z1, z2]
   45           - enum: [x, y, z1, z2]
   46           - enum: [x, y, z1, z2]
   47 
   48   touchscreen-size-x: true
   49   touchscreen-size-y: true
   50   touchscreen-fuzz-x: true
   51   touchscreen-fuzz-y: true
   52   touchscreen-inverted-x: true
   53   touchscreen-inverted-y: true
   54   touchscreen-swapped-x-y: true
   55   touchscreen-min-pressure: true
   56   touchscreen-x-plate-ohms: true
   57 
   58 additionalProperties: false
   59 
   60 required:
   61   - compatible
   62   - io-channels
   63   - io-channel-names
   64 
   65 examples:
   66   - |
   67     touchscreen {
   68       compatible = "resistive-adc-touch";
   69       io-channels = <&adc 24>, <&adc 25>;
   70       io-channel-names = "y", "x";
   71     };
   72   - |
   73     touchscreen {
   74       compatible = "resistive-adc-touch";
   75       touchscreen-min-pressure = <50000>;
   76       io-channels = <&adc 24>, <&adc 25>, <&adc 26>;
   77       io-channel-names = "y", "pressure", "x";
   78     };
   79   - |
   80     touchscreen {
   81       compatible = "resistive-adc-touch";
   82       touchscreen-min-pressure = <50000>;
   83       io-channels = <&adc 1>, <&adc 2>, <&adc 3>, <&adc 4>;
   84       io-channel-names = "x", "z1", "z2", "y";
   85       touchscreen-x-plate-ohms = <800>;
   86     };

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FreeBSD/Linux Kernel Cross Reference sys/contrib/device-tree/Bindings/input/touchscreen/resistive-adc-touch.yaml

FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/input/touchscreen/resistive-adc-touch.yaml