96 lines
2.3 KiB
YAML
96 lines
2.3 KiB
YAML
# Copyright 2023 Google LLC
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# SPDX-License-Identifier: Apache-2.0
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description: |
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ADC based analog axis input device
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Implement an input device generating absolute axis events by periodically
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reading from some ADC channels.
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Example configuration:
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#include <zephyr/dt-bindings/input/input-event-codes.h>
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analog_axis {
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compatible = "analog-axis";
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poll-period-ms = <15>;
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axis-x {
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io-channels = <&adc 0>;
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in-deadzone = <50>;
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in-min = <100>;
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in-max = <800>;
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zephyr,axis = <INPUT_ABS_X>;
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};
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};
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compatible: "analog-axis"
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include: base.yaml
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properties:
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poll-period-ms:
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type: int
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default: 15
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description: |
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How often to get new ADC samples for the various configured axes in
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milliseconds. Defaults to 15ms if unspecified.
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child-binding:
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properties:
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io-channels:
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type: phandle-array
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required: true
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description: |
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ADC IO channel to use.
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out-min:
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type: int
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default: 0
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description: |
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Minimum value to output on input events. Defaults to 0 if unspecified.
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out-max:
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type: int
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default: 255
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description: |
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Maximum value to output on input events. Defaults to 255 if
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unspecified.
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in-deadzone:
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type: int
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default: 0
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description: |
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Deadzone for the input center value. If specified input values between
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the center of the range plus or minus this value will be reported as
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center. Defaults to 0, no deadzone.
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in-min:
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type: int
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required: true
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description: |
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Input value that corresponds to the minimum output value.
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in-max:
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type: int
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required: true
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description: |
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Input value that corresponds to the maximum output value.
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zephyr,axis:
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type: int
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required: true
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description: |
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The input code for the axis to report for the device, typically any of
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INPUT_ABS_*.
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invert-input:
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type: boolean
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description: |
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If set, invert the raw ADC value before processing it. Useful for
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differential channels.
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invert-output:
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type: boolean
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description: |
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If set, invert the output value.
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