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1# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)2%YAML 1.23---4$id: http://devicetree.org/schemas/input/touchscreen/resistive-adc-touch.yaml#5$schema: http://devicetree.org/meta-schemas/core.yaml#6 7title: Generic resistive touchscreen ADC8 9maintainers:10  - Oleksij Rempel <o.rempel@pengutronix.de>11 12description: |13  Generic ADC based resistive touchscreen controller14  The device must be connected to an ADC device that provides channels for15  position measurement and optional pressure.16 17allOf:18  - $ref: touchscreen.yaml#19 20properties:21  compatible:22    const: resistive-adc-touch23 24  io-channels:25    minItems: 226    items:27      - description: x28      - description: y29      - 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: true49  touchscreen-size-y: true50  touchscreen-fuzz-x: true51  touchscreen-fuzz-y: true52  touchscreen-inverted-x: true53  touchscreen-inverted-y: true54  touchscreen-swapped-x-y: true55  touchscreen-min-pressure: true56  touchscreen-x-plate-ohms: true57 58additionalProperties: false59 60required:61  - compatible62  - io-channels63  - io-channel-names64 65examples: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    };87