1* Liebherr's BK4 controller external SPI
2
3A device which handles data acquisition from compatible industrial
4peripherals.
5The SPI is used for data and management purposes in both master and
6slave modes.
7
8Required properties:
9
10- compatible : Should be "lwn,bk4"
11
12Required SPI properties:
13
14- reg : Should be address of the device chip select within
15  the controller.
16
17- spi-max-frequency : Maximum SPI clocking speed of device in Hz, should be
18  30MHz at most for the Liebherr's BK4 external bus.
19
20Example:
21
22spidev0: spi@0 {
23	compatible = "lwn,bk4";
24	spi-max-frequency = <30000000>;
25	reg = <0>;
26};
27