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