1MOXA ART DMA Controller 2 3See dma.txt first 4 5Required properties: 6 7- compatible : Must be "moxa,moxart-dma" 8- reg : Should contain registers location and length 9- interrupts : Should contain an interrupt-specifier for the sole 10 interrupt generated by the device 11- #dma-cells : Should be 1, a single cell holding a line request number 12 13Example: 14 15 dma: dma@90500000 { 16 compatible = "moxa,moxart-dma"; 17 reg = <0x90500080 0x40>; 18 interrupts = <24 0>; 19 #dma-cells = <1>; 20 }; 21 22 23Clients: 24 25DMA clients connected to the MOXA ART DMA controller must use the format 26described in the dma.txt file, using a two-cell specifier for each channel: 27a phandle plus one integer cells. 28The two cells in order are: 29 301. A phandle pointing to the DMA controller. 312. Peripheral identifier for the hardware handshaking interface. 32 33Example: 34Use specific request line passing from dma 35For example, MMC request line is 5 36 37 sdhci: sdhci@98e00000 { 38 compatible = "moxa,moxart-sdhci"; 39 reg = <0x98e00000 0x5C>; 40 interrupts = <5 0>; 41 clocks = <&clk_apb>; 42 dmas = <&dma 5>, 43 <&dma 5>; 44 dma-names = "tx", "rx"; 45 }; 46