1* Spreadtrum DMA controller 2 3This binding follows the generic DMA bindings defined in dma.txt. 4 5Required properties: 6- compatible: Should be "sprd,sc9860-dma". 7- reg: Should contain DMA registers location and length. 8- interrupts: Should contain one interrupt shared by all channel. 9- #dma-cells: must be <1>. Used to represent the number of integer 10 cells in the dmas property of client device. 11- #dma-channels : Number of DMA channels supported. Should be 32. 12- clock-names: Should contain the clock of the DMA controller. 13- clocks: Should contain a clock specifier for each entry in clock-names. 14 15Example: 16 17Controller: 18apdma: dma-controller@20100000 { 19 compatible = "sprd,sc9860-dma"; 20 reg = <0x20100000 0x4000>; 21 interrupts = <GIC_SPI 50 IRQ_TYPE_LEVEL_HIGH>; 22 #dma-cells = <1>; 23 #dma-channels = <32>; 24 clock-names = "enable"; 25 clocks = <&clk_ap_ahb_gates 5>; 26}; 27 28 29Client: 30DMA clients connected to the Spreadtrum DMA controller must use the format 31described in the dma.txt file, using a two-cell specifier for each channel. 32The two cells in order are: 331. A phandle pointing to the DMA controller. 342. The slave id. 35 36spi0: spi@70a00000{ 37 ... 38 dma-names = "rx_chn", "tx_chn"; 39 dmas = <&apdma 11>, <&apdma 12>; 40 ... 41}; 42