4 - compatible : should be "atmel,at91rm9200-spi" or "microchip,sam9x60-spi".
5 - reg: Address and length of the register set for the device
6 - interrupts: Should contain spi interrupt
7 - cs-gpios: chipselects (optional for SPI controller version >= 2 with the
8 Chip Select Active After Transfer feature).
9 - clock-names: tuple listing input clock names.
10 Required elements: "spi_clk"
11 - clocks: phandles to input clocks.
14 - atmel,fifo-size: maximum number of data the RX and TX FIFOs can store for FIFO
15 capable SPI controllers.
20 compatible = "atmel,at91rm9200-spi";
21 reg = <0xfffcc000 0x4000>;
22 interrupts = <13 4 5>;
26 clock-names = "spi_clk";
27 cs-gpios = <&pioB 3 0>;
28 atmel,fifo-size = <32>;
31 compatible = "mmc-spi-slot";
33 gpios = <&pioC 4 0>; /* CD */
34 spi-max-frequency = <25000000>;