dt/bindings: add binding for ARM Versatile character LCD

Add binding doc for Versatile platforms character LCD controller
interface.

Signed-off-by: Rob Herring <robh@kernel.org>
Cc: Pawel Moll <pawel.moll@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Ian Campbell <ijc+devicetree@hellion.org.uk>
Cc: Kumar Gala <galak@codeaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/Documentation/devicetree/bindings/misc/arm-charlcd.txt b/Documentation/devicetree/bindings/misc/arm-charlcd.txt
new file mode 100644 (file)
index 0000000..e28e2aa
--- /dev/null
+++ b/Documentation/devicetree/bindings/misc/arm-charlcd.txt
@@ -0,0 +1,18 @@
+ARM Versatile Character LCD
+-----------------------------------------------------
+This binding defines the character LCD interface found on ARM Versatile AB
+and PB reference platforms.
+
+Required properties:
+- compatible : "arm,versatile-clcd"
+- reg : Location and size of character LCD registers
+
+Optional properties:
+- interrupts - single interrupt for character LCD. The character LCD can
+  operate in polled mode without an interrupt.
+
+Example:
+       lcd@10008000 {
+               compatible = "arm,versatile-lcd";
+               reg = <0x10008000 0x1000>;
+       };