Input: add driver for Zeitec ZET6223

This is a basic driver for the Zeitec ZET6223 I2C touchscreen
controllers. The driver does not support firmware loading, which is not
required for all tablets which contain this chip.

Signed-off-by: Jelle van der Waa <jelle@vdwaa.nl>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

1 files changed, 32 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/input/touchscreen/zet6223.txt b/Documentation/devicetree/bindings/input/touchscreen/zet6223.txt
new file mode 100644
index 000000000000..fe6a1feef703
--- /dev/null
+++ b/Documentation/devicetree/bindings/input/touchscreen/zet6223.txt
@@ -0,0 +1,32 @@
+Zeitec ZET6223 I2C touchscreen controller
+
+Required properties:
+- compatible              : "zeitec,zet6223"
+- reg                     : I2C slave address of the chip (0x76)
+- interrupt-parent        : a phandle pointing to the interrupt controller
+                            serving the interrupt for this chip
+- interrupts              : interrupt specification for the zet6223 interrupt
+
+Optional properties:
+
+- vio-supply              : Specification for VIO supply (1.8V or 3.3V,
+                            depending on system interface needs).
+- vcc-supply              : Specification for 3.3V VCC supply.
+- touchscreen-size-x      : See touchscreen.txt
+- touchscreen-size-y      : See touchscreen.txt
+- touchscreen-inverted-x  : See touchscreen.txt
+- touchscreen-inverted-y  : See touchscreen.txt
+- touchscreen-swapped-x-y : See touchscreen.txt
+
+Example:
+
+i2c@00000000 {
+
+        zet6223: touchscreen@76 {
+                compatible = "zeitec,zet6223";
+                reg = <0x76>;
+                interrupt-parent = <&pio>;
+                interrupts = <6 11 IRQ_TYPE_EDGE_FALLING>
+        };
+
+};