The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)

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FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/misc/lwn-bk4.txt

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    1 * Liebherr's BK4 controller external SPI
    2 
    3 A device which handles data acquisition from compatible industrial
    4 peripherals.
    5 The SPI is used for data and management purposes in both master and
    6 slave modes.
    7 
    8 Required properties:
    9 
   10 - compatible : Should be "lwn,bk4"
   11 
   12 Required 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 
   20 Example:
   21 
   22 spidev0: spi@0 {
   23         compatible = "lwn,bk4";
   24         spi-max-frequency = <30000000>;
   25         reg = <0>;
   26 };

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