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33 lines
1.2 KiB
33 lines
1.2 KiB
Generic resistive touchscreen ADC |
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Required properties: |
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- compatible: must be "resistive-adc-touch" |
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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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Refer to |
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https://github.com/devicetree-org/dt-schema/blob/master/schemas/iio/iio-consumer.yaml |
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for details |
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- iio-channels: must have at least two channels connected to an ADC device. |
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These should correspond to the channels exposed by the ADC device and should |
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have the right index as the ADC device registers them. These channels |
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represent the relative position on the "x" and "y" axes. |
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- iio-channel-names: must have all the channels' names. Mandatory channels |
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are "x" and "y". |
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Optional properties: |
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- iio-channels: The third channel named "pressure" is optional and can be |
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used if the ADC device also measures pressure besides position. |
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If this channel is missing, pressure will be ignored and the touchscreen |
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will only report position. |
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- iio-channel-names: optional channel named "pressure". |
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Example: |
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resistive_touch: resistive_touch { |
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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 = "x", "y", "pressure"; |
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};
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