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1* Hisilicon K3 DMA controller2 3See dma.txt first4 5Required properties:6- compatible: Must be one of7- "hisilicon,k3-dma-1.0"8- "hisilicon,hisi-pcm-asp-dma-1.0"9- reg: Should contain DMA registers location and length.10- interrupts: Should contain one interrupt shared by all channel11- #dma-cells: see dma.txt, should be 1, para number12- dma-channels: physical channels supported13- dma-requests: virtual channels supported, each virtual channel14 have specific request line15- clocks: clock required16 17Example:18 19Controller:20 dma0: dma@fcd02000 {21 compatible = "hisilicon,k3-dma-1.0";22 reg = <0xfcd02000 0x1000>;23 #dma-cells = <1>;24 dma-channels = <16>;25 dma-requests = <27>;26 interrupts = <0 12 4>;27 clocks = <&pclk>;28 };29 30Client:31Use specific request line passing from dmax32For example, i2c0 read channel request line is 18, while write channel use 1933 34 i2c0: i2c@fcb08000 {35 compatible = "snps,designware-i2c";36 dmas = <&dma0 18 /* read channel */37 &dma0 19>; /* write channel */38 dma-names = "rx", "tx";39 };40 41 i2c1: i2c@fcb09000 {42 compatible = "snps,designware-i2c";43 dmas = <&dma0 20 /* read channel */44 &dma0 21>; /* write channel */45 dma-names = "rx", "tx";46 };47 48