87 lines
2.1 KiB
YAML
87 lines
2.1 KiB
YAML
# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/input/touchscreen/resistive-adc-touch.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Generic resistive touchscreen ADC
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maintainers:
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- Oleksij Rempel <o.rempel@pengutronix.de>
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description: |
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Generic ADC based resistive touchscreen controller
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The device must be connected to an ADC device that provides channels for
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position measurement and optional pressure.
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allOf:
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- $ref: touchscreen.yaml#
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properties:
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compatible:
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const: resistive-adc-touch
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io-channels:
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minItems: 2
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items:
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- description: x
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- description: y
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- description: pressure (optional)
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- description: z1 (optional)
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- description: z2 (optional)
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io-channel-names:
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oneOf:
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- items:
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- enum: [x, y]
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- enum: [x, y]
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- items:
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- enum: [x, y, pressure]
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- enum: [x, y, pressure]
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- enum: [x, y, pressure]
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- items:
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- enum: [x, y, z1, z2]
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- enum: [x, y, z1, z2]
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- enum: [x, y, z1, z2]
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- enum: [x, y, z1, z2]
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touchscreen-size-x: true
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touchscreen-size-y: true
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touchscreen-fuzz-x: true
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touchscreen-fuzz-y: true
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touchscreen-inverted-x: true
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touchscreen-inverted-y: true
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touchscreen-swapped-x-y: true
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touchscreen-min-pressure: true
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touchscreen-x-plate-ohms: true
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additionalProperties: false
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required:
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- compatible
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- io-channels
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- io-channel-names
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examples:
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- |
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touchscreen {
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compatible = "resistive-adc-touch";
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io-channels = <&adc 24>, <&adc 25>;
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io-channel-names = "y", "x";
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};
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- |
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touchscreen {
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compatible = "resistive-adc-touch";
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touchscreen-min-pressure = <50000>;
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io-channels = <&adc 24>, <&adc 25>, <&adc 26>;
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io-channel-names = "y", "pressure", "x";
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};
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- |
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touchscreen {
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compatible = "resistive-adc-touch";
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touchscreen-min-pressure = <50000>;
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io-channels = <&adc 1>, <&adc 2>, <&adc 3>, <&adc 4>;
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io-channel-names = "x", "z1", "z2", "y";
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touchscreen-x-plate-ohms = <800>;
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};
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