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