Documentation for 'intel,8042' DT compatible node.

Signed-off-by: Tony Prisk <li...@prisktech.co.nz>
Signed-off-by: Roman Volkov <v1...@v1ros.org>
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 .../devicetree/bindings/input/intel-8042.txt       | 26 ++++++++++++++++++++++
 1 file changed, 26 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/input/intel-8042.txt

diff --git a/Documentation/devicetree/bindings/input/intel-8042.txt 
b/Documentation/devicetree/bindings/input/intel-8042.txt
new file mode 100644
index 0000000..ab8a3e0
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+Intel 8042 Keyboard Controller
+
+Required properties:
+- compatible: should be "intel,8042"
+- regs: memory for keyboard controller
+- interrupts: usually, two interrupts should be specified (keyboard and aux).
+       However, only one interrupt is also allowed in case of absence of the
+       physical port in the controller. The i8042 driver must be loaded with
+       nokbd/noaux option in this case.
+- interrupt-names: interrupt names corresponding to numbers in the list.
+       "kbd" is the keyboard interrupt and "aux" is the auxiliary (mouse)
+       interrupt.
+- command-reg: offset in memory for command register
+- status-reg: offset in memory for status register
+- data-reg: offset in memory for data register
+
+Example:
+       i8042@d8008800 {
+               compatible = "intel,8042";
+               regs = <0xd8008800 0x100>;
+               interrupts = <23>, <4>;
+               interrupt-names = "kbd", "aux";
+               command-reg = <0x04>;
+               status-reg = <0x04>;
+               data-reg = <0x00>;
+       };
-- 
2.3.0

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