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

     * Spreadtrum DMA controller
     
     This binding follows the generic DMA bindings defined in dma.txt.
     
     Required properties:
     - compatible: Should be "sprd,sc9860-dma".
     - reg: Should contain DMA registers location and length.
     - interrupts: Should contain one interrupt shared by all channel.
     - #dma-cells: must be <1>. Used to represent the number of integer
            cells in the dmas property of client device.
    - dma-channels : Number of DMA channels supported. Should be 32.
    - clock-names: Should contain the clock of the DMA controller.
    - clocks: Should contain a clock specifier for each entry in clock-names.
    
    Deprecated properties:
    - #dma-channels : Number of DMA channels supported. Should be 32.
    
    Example:
    
    Controller:
    apdma: dma-controller@20100000 {
            compatible = "sprd,sc9860-dma";
            reg = <0x20100000 0x4000>;
            interrupts = <GIC_SPI 50 IRQ_TYPE_LEVEL_HIGH>;
            #dma-cells = <1>;
            dma-channels = <32>;
            clock-names = "enable";
            clocks = <&clk_ap_ahb_gates 5>;
    };
    
    
    Client:
    DMA clients connected to the Spreadtrum DMA controller must use the format
    described in the dma.txt file, using a two-cell specifier for each channel.
    The two cells in order are:
    1. A phandle pointing to the DMA controller.
    2. The slave id.
    
    spi0: spi@70a00000{
            ...
            dma-names = "rx_chn", "tx_chn";
            dmas = <&apdma 11>, <&apdma 12>;
            ...
    };

Cache object: ad20ec901d7adf73e0a0dac116154134