1* Hisilicon K3 DMA controller 2 3See dma.txt first 4 5Required properties: 6- compatible: Must be one of 7- "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 channel 11- #dma-cells: see dma.txt, should be 1, para number 12- dma-channels: physical channels supported 13- dma-requests: virtual channels supported, each virtual channel 14 have specific request line 15- clocks: clock required 16 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 dmax 32For example, i2c0 read channel request line is 18, while write channel use 19 33 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