FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/spi/spi-sprd.txt

     Spreadtrum SPI Controller
     
     Required properties:
     - compatible: Should be "sprd,sc9860-spi".
     - reg: Offset and length of SPI controller register space.
     - interrupts: Should contain SPI interrupt.
     - clock-names: Should contain following entries:
             "spi" for SPI clock,
             "source" for SPI source (parent) clock,
            "enable" for SPI module enable clock.
    - clocks: List of clock input name strings sorted in the same order
            as the clock-names property.
    - #address-cells: The number of cells required to define a chip select
            address on the SPI bus. Should be set to 1.
    - #size-cells: Should be set to 0.
    
    Optional properties:
    dma-names: Should contain names of the SPI used DMA channel.
    dmas: Should contain DMA channels and DMA slave ids which the SPI used
            sorted in the same order as the dma-names property.
    
    Example:
    spi0: spi@70a00000{
            compatible = "sprd,sc9860-spi";
            reg = <0 0x70a00000 0 0x1000>;
            interrupts = <GIC_SPI 7 IRQ_TYPE_LEVEL_HIGH>;
            clock-names = "spi", "source","enable";
            clocks = <&clk_spi0>, <&ext_26m>, <&clk_ap_apb_gates 5>;
            dma-names = "rx_chn", "tx_chn";
            dmas = <&apdma 11 11>, <&apdma 12 12>;
            #address-cells = <1>;
            #size-cells = <0>;
    };

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