FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/dma/mtk-uart-apdma.txt

     * Mediatek UART APDMA Controller
     
     Required properties:
     - compatible should contain:
       * "mediatek,mt2712-uart-dma" for MT2712 compatible APDMA
       * "mediatek,mt6577-uart-dma" for MT6577 and all of the above
       * "mediatek,mt8516-uart-dma", "mediatek,mt6577" for MT8516 SoC
     
     - reg: The base address of the APDMA register bank.
    
    - interrupts: A single interrupt specifier.
     One interrupt per dma-requests, or 8 if no dma-requests property is present
    
    - dma-requests: The number of DMA channels
    
    - clocks : Must contain an entry for each entry in clock-names.
      See ../clocks/clock-bindings.txt for details.
    - clock-names: The APDMA clock for register accesses
    
    - mediatek,dma-33bits: Present if the DMA requires support
    
    Examples:
    
            apdma: dma-controller@11000400 {
                    compatible = "mediatek,mt2712-uart-dma",
                                 "mediatek,mt6577-uart-dma";
                    reg = <0 0x11000400 0 0x80>,
                          <0 0x11000480 0 0x80>,
                          <0 0x11000500 0 0x80>,
                          <0 0x11000580 0 0x80>,
                          <0 0x11000600 0 0x80>,
                          <0 0x11000680 0 0x80>,
                          <0 0x11000700 0 0x80>,
                          <0 0x11000780 0 0x80>,
                          <0 0x11000800 0 0x80>,
                          <0 0x11000880 0 0x80>,
                          <0 0x11000900 0 0x80>,
                          <0 0x11000980 0 0x80>;
                    interrupts = <GIC_SPI 103 IRQ_TYPE_LEVEL_LOW>,
                                 <GIC_SPI 104 IRQ_TYPE_LEVEL_LOW>,
                                 <GIC_SPI 105 IRQ_TYPE_LEVEL_LOW>,
                                 <GIC_SPI 106 IRQ_TYPE_LEVEL_LOW>,
                                 <GIC_SPI 107 IRQ_TYPE_LEVEL_LOW>,
                                 <GIC_SPI 108 IRQ_TYPE_LEVEL_LOW>,
                                 <GIC_SPI 109 IRQ_TYPE_LEVEL_LOW>,
                                 <GIC_SPI 110 IRQ_TYPE_LEVEL_LOW>,
                                 <GIC_SPI 111 IRQ_TYPE_LEVEL_LOW>,
                                 <GIC_SPI 112 IRQ_TYPE_LEVEL_LOW>,
                                 <GIC_SPI 113 IRQ_TYPE_LEVEL_LOW>,
                                 <GIC_SPI 114 IRQ_TYPE_LEVEL_LOW>;
                    dma-requests = <12>;
                    clocks = <&pericfg CLK_PERI_AP_DMA>;
                    clock-names = "apdma";
                    mediatek,dma-33bits;
                    #dma-cells = <1>;
            };

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