path: root/dts/Bindings/input/touchscreen/resistive-adc-touch.txt
diff options
authorSascha Hauer <>2018-09-11 08:26:30 +0200
committerSascha Hauer <>2018-09-11 17:23:13 +0200
commit35f607bc7da71b302fd6bf3d6d48d7ea66df1195 (patch)
treedd2cf14c56430d21079c794fa6e03d7f5d91070e /dts/Bindings/input/touchscreen/resistive-adc-touch.txt
parent625eea2765d94aee016cf25d9cabecde8eae0775 (diff)
dts: update to v4.19-rc1
Signed-off-by: Sascha Hauer <>
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+Generic resistive touchscreen ADC
+Required properties:
+ - compatible: must be "resistive-adc-touch"
+The device must be connected to an ADC device that provides channels for
+position measurement and optional pressure.
+Refer to ../iio/iio-bindings.txt for details
+ - iio-channels: must have at least two channels connected to an ADC device.
+These should correspond to the channels exposed by the ADC device and should
+have the right index as the ADC device registers them. These channels
+represent the relative position on the "x" and "y" axes.
+ - iio-channel-names: must have all the channels' names. Mandatory channels
+are "x" and "y".
+Optional properties:
+ - iio-channels: The third channel named "pressure" is optional and can be
+used if the ADC device also measures pressure besides position.
+If this channel is missing, pressure will be ignored and the touchscreen
+will only report position.
+ - iio-channel-names: optional channel named "pressure".
+ resistive_touch: resistive_touch {
+ compatible = "resistive-adc-touch";
+ touchscreen-min-pressure = <50000>;
+ io-channels = <&adc 24>, <&adc 25>, <&adc 26>;
+ io-channel-names = "x", "y", "pressure";
+ };