From 8d452721628db190964ab44e302c3e3fb3bdb8ef Mon Sep 17 00:00:00 2001 From: Lukasz Majewski Date: Fri, 28 Sep 2018 00:26:55 +0200 Subject: dt-bindings: misc: bk4: Add device tree binding for Liebherr's BK4 SPI bus Add Device Tree binding document for Liebherr's BK4 external SPI bus. Signed-off-by: Lukasz Majewski Signed-off-by: Rob Herring --- Documentation/devicetree/bindings/misc/lwn-bk4.txt | 26 ++++++++++++++++++++++ 1 file changed, 26 insertions(+) create mode 100644 Documentation/devicetree/bindings/misc/lwn-bk4.txt (limited to 'Documentation/devicetree/bindings/misc') diff --git a/Documentation/devicetree/bindings/misc/lwn-bk4.txt b/Documentation/devicetree/bindings/misc/lwn-bk4.txt new file mode 100644 index 000000000000..d6a8c188c087 --- /dev/null +++ b/Documentation/devicetree/bindings/misc/lwn-bk4.txt @@ -0,0 +1,26 @@ +* 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>; +}; -- cgit v1.2.3