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diff --git a/Documentation/devicetree/bindings/misc/lwn-bk4.txt b/Documentation/devicetree/bindings/misc/lwn-bk4.txt
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--- a/Documentation/devicetree/bindings/misc/lwn-bk4.txt
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-* Liebherr's BK4 controller external SPI
-
-A device which handles data acquisition from compatible industrial
-peripherals.
-The SPI is used for data and management purposes in both master and
-slave modes.
-
-Required properties:
-
-- compatible : Should be "lwn,bk4"
-
-Required SPI properties:
-
-- reg : Should be address of the device chip select within
-  the controller.
-
-- spi-max-frequency : Maximum SPI clocking speed of device in Hz, should be
-  30MHz at most for the Liebherr's BK4 external bus.
-
-Example:
-
-spidev0: spi@0 {
-	compatible = "lwn,bk4";
-	spi-max-frequency = <30000000>;
-	reg = <0>;
-};