linux/Documentation/devicetree/bindings/spi/spi-orion.txt
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   1Marvell Orion SPI device
   2
   3Required properties:
   4- compatible : should be "marvell,orion-spi".
   5- reg : offset and length of the register set for the device
   6- cell-index : Which of multiple SPI controllers is this.
   7Optional properties:
   8- interrupts : Is currently not used.
   9
  10Example:
  11       spi@10600 {
  12               compatible = "marvell,orion-spi";
  13               #address-cells = <1>;
  14               #size-cells = <0>;
  15               cell-index = <0>;
  16               reg = <0x10600 0x28>;
  17               interrupts = <23>;
  18               status = "disabled";
  19       };
  20