Added bindings for Microchip SAMA5D2 resistive touchscreen.
Signed-off-by: Eugen Hristev <[email protected]>
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.../bindings/input/touchscreen/sama5d2_rts.txt | 31 ++++++++++++++++++++++
1 file changed, 31 insertions(+)
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Documentation/devicetree/bindings/input/touchscreen/sama5d2_rts.txt
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a/Documentation/devicetree/bindings/input/touchscreen/sama5d2_rts.txt
b/Documentation/devicetree/bindings/input/touchscreen/sama5d2_rts.txt
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+Microchip SAMA5D2 resistive touchscreen
+
+Required properties:
+
+ - compatible: microchip,sama5d2-resistive-touch
+
+Optional properties:
+
+The device must be connected to an IIO device that provides channels for
+position and pressure measurement, and a trigger output that will periodically
+trigger when the touch is pressed.
+Refer to ../iio/iio-bindings.txt for details
+
+ - io-channels: can have two or three channels connected to an IIO device.
+These should correspond to the channels exposed by the IIO device and should
+have the right index as the ADC registers them.
+ - io-channel-names: must have the two or three channels' names :
+"x", "y", or "x", "y" and "pressure"
+ - io-triggers: can have a trigger input connected to an IIO device.
+ - microchip,pressure-threshold: a pressure threshold for the touchscreen.
+ Represented by an integer value.
+
+Example:
+
+ resistive_touch: resistive-touch {
+ compatible = "microchip,sama5d2-resistive-touch";
+ microchip,pressure-threshold = <3000>;
+ io-channels = <&adc 19>, <&adc 20>, <&adc 21>;
+ io-channel-names = "x", "y", "pressure";
+ io-triggers = <&adc 1>;
+ };
--
2.7.4
