Documentation/devicetree/bindings/spi/spi-xtensa-xtfpga.txt

   1 Cadence Xtensa XTFPGA platform SPI controller.
   2
   3 This simple SPI master controller is built into xtfpga bitstreams and is used
   4 to control daughterboard audio codec.
   5
   6 Required properties:
   7 - compatible: should be "cdns,xtfpga-spi".
   8 - reg: physical base address of the controller and length of memory mapped
   9   region.