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