Input: serio - add support for Alwinner A10/A20 PS/2 controller

This driver implements support for PS2 controller found on Allwinner A10,
A20 SOCs. It has been tested on A20 Olimex-Lime2 board and also on A10.

Signed-off-by: Vishnu Patekar <vishnupatekar0510@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

1 files changed, 23 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/serio/allwinner,sun4i-ps2.txt b/Documentation/devicetree/bindings/serio/allwinner,sun4i-ps2.txt
new file mode 100644
index 000000000000..362a76925bcd
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+++ b/Documentation/devicetree/bindings/serio/allwinner,sun4i-ps2.txt
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+* Device tree bindings for Allwinner A10, A20 PS2 host controller
+
+A20 PS2 is dual role controller (PS2 host and PS2 device). These bindings are
+for PS2 A10/A20 host controller. IBM compliant IBM PS2 and AT-compatible keyboard
+and mouse can be connected.
+
+Required properties:
+
+ - reg             : Offset and length of the register set for the device.
+ - compatible      : Should be as of the following:
+                     - "allwinner,sun4i-a10-ps2"
+ - interrupts      : The interrupt line connected to the PS2.
+ - clocks          : The gate clk connected to the PS2.
+
+
+Example:
+	ps20: ps2@0x01c2a000 {
+		compatible = "allwinner,sun4i-a10-ps2";
+		reg = <0x01c2a000 0x400>;
+		interrupts = <0 62 4>;
+		clocks = <&apb1_gates 6>;
+		status = "disabled";
+	};