Documentation/devicetree/bindings/spi/spi_oc_tiny.txt

   1 OpenCores tiny SPI
   2
   3 Required properties:
   4 - compatible : should be "opencores,tiny-spi-rtlsvn2".
   5 - gpios : should specify GPIOs used for chipselect.
   6 Optional properties:
   7 - clock-frequency : input clock frequency to the core.
   8 - baud-width: width, in bits, of the programmable divider used to scale
   9         the input clock to SCLK.
  10
  11 The clock-frequency and baud-width properties are needed only if the divider
  12 is programmable. They are not needed if the divider is fixed.