On Fri, Sep 28, 2018 at 12:26:55AM +0200, Lukasz Majewski wrote: > Add Device Tree binding document for Liebherr's BK4 external SPI bus. > > Signed-off-by: Lukasz Majewski <lukma@xxxxxxx> There should really be a patch series consisting of this one and spidev change [1]. Since spidev has already been picked up, having a series including this and dts change would be the second option. With DT folks' ACK, I can send bindings change together with DTS using it. Shawn [1] https://lkml.org/lkml/2018/9/28/48 > --- > Documentation/devicetree/bindings/misc/lwn-bk4.txt | 26 ++++++++++++++++++++++ > 1 file changed, 26 insertions(+) > create mode 100644 Documentation/devicetree/bindings/misc/lwn-bk4.txt > > 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>; > +}; > -- > 2.11.0 >
