[PATCH 2/4] dt-bindings: add binding for Nsiway NS2009 touchscreen controller

[Icenowy Zheng]

Nsiway NS2009 is a resistive touchscreen controller, with I2C interface
and optional interrupt pin.

Add binding document for it.

Signed-off-by: Icenowy Zheng <icenowy at aosc.xyz>
---
 .../bindings/input/touchscreen/ns2009.txt          | 23 ++++++++++++++++++++++
 1 file changed, 23 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/input/touchscreen/ns2009.txt

diff --git a/Documentation/devicetree/bindings/input/touchscreen/ns2009.txt b/Documentation/devicetree/bindings/input/touchscreen/ns2009.txt
new file mode 100644
index 000000000000..0e9090ba978c
--- /dev/null
+++ b/Documentation/devicetree/bindings/input/touchscreen/ns2009.txt
@@ -0,0 +1,23 @@
+* Nsiway NS2009 Resistive Touchscreen Controller
+
+Required properties:
+- compatible		  : "nsiway,ns2009"
+- reg			  : I2C slave address of the chip (0x48 or 0x49, depends on
+			    the hardware)
+
+Optional properties:
+- interrupt-parent	  : a phandle pointing to the interrupt controller
+			    serving the interrupt for this chip
+- interrupts		  : interrupt specification for the ns2009 pen interrupt
+- properties defined in touchscreen.txt
+
+Example:
+
+i2c at 00000000 {
+	ns2009: touchscreen at 48 {
+		compatible = "nsiway,ns2009";
+		reg = <0x48>;
+		touchscreen-fuzz-x = <8>;
+		touchscreen-fuzz-y = <8>;
+	};
+};
-- 
2.12.0