1* Hisilicon K3 DMA controller 2 3See dma.txt first 4 5Required properties: 6- compatible: Should be "hisilicon,k3-dma-1.0" 7- reg: Should contain DMA registers location and length. 8- interrupts: Should contain one interrupt shared by all channel 9- #dma-cells: see dma.txt, should be 1, para number 10- dma-channels: physical channels supported 11- dma-requests: virtual channels supported, each virtual channel 12 have specific request line 13- clocks: clock required 14 15Example: 16 17Controller: 18 dma0: dma@fcd02000 { 19 compatible = "hisilicon,k3-dma-1.0"; 20 reg = <0xfcd02000 0x1000>; 21 #dma-cells = <1>; 22 dma-channels = <16>; 23 dma-requests = <27>; 24 interrupts = <0 12 4>; 25 clocks = <&pclk>; 26 status = "disable"; 27 }; 28 29Client: 30Use specific request line passing from dmax 31For example, i2c0 read channel request line is 18, while write channel use 19 32 33 i2c0: i2c@fcb08000 { 34 compatible = "snps,designware-i2c"; 35 dmas = <&dma0 18 /* read channel */ 36 &dma0 19>; /* write channel */ 37 dma-names = "rx", "tx"; 38 }; 39 40 i2c1: i2c@fcb09000 { 41 compatible = "snps,designware-i2c"; 42 dmas = <&dma0 20 /* read channel */ 43 &dma0 21>; /* write channel */ 44 dma-names = "rx", "tx"; 45 }; 46 47