From: Eugen Hristev Date: Tue, 22 May 2018 07:52:34 +0000 (+0300) Subject: dt-bindings: input: touchscreen: resistive-adc-touch: create bindings X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=1b5bd7d25c7826bb2cc56ff4e9e41a4bdfd8f7a8;p=openwrt%2Fstaging%2Fblogic.git dt-bindings: input: touchscreen: resistive-adc-touch: create bindings Added bindings for generic resistive touchscreen ADC. Signed-off-by: Eugen Hristev Reviewed-by: Rob Herring Signed-off-by: Jonathan Cameron --- diff --git a/Documentation/devicetree/bindings/input/touchscreen/resistive-adc-touch.txt b/Documentation/devicetree/bindings/input/touchscreen/resistive-adc-touch.txt new file mode 100644 index 000000000000..51456c0e9a27 --- /dev/null +++ b/Documentation/devicetree/bindings/input/touchscreen/resistive-adc-touch.txt @@ -0,0 +1,30 @@ +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". + +Example: + + 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"; + };