1* Actions Semi Owl SoCs DMA controller 2 3This binding follows the generic DMA bindings defined in dma.txt. 4 5Required properties: 6- compatible: Should be "actions,s900-dma". 7- reg: Should contain DMA registers location and length. 8- interrupts: Should contain 4 interrupts 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: Physical channels supported. 12- dma-requests: Number of DMA request signals supported by the controller. 13 Refer to Documentation/devicetree/bindings/dma/dma.txt 14- clocks: Phandle and Specifier of the clock feeding the DMA controller. 15 16Example: 17 18Controller: 19 dma: dma-controller@e0260000 { 20 compatible = "actions,s900-dma"; 21 reg = <0x0 0xe0260000 0x0 0x1000>; 22 interrupts = <GIC_SPI 57 IRQ_TYPE_LEVEL_HIGH>, 23 <GIC_SPI 58 IRQ_TYPE_LEVEL_HIGH>, 24 <GIC_SPI 59 IRQ_TYPE_LEVEL_HIGH>, 25 <GIC_SPI 60 IRQ_TYPE_LEVEL_HIGH>; 26 #dma-cells = <1>; 27 dma-channels = <12>; 28 dma-requests = <46>; 29 clocks = <&clock CLK_DMAC>; 30 }; 31 32Client: 33 34DMA clients connected to the Actions Semi Owl SoCs DMA controller must 35use the format described in the dma.txt file, using a two-cell specifier 36for each channel. 37 38The two cells in order are: 391. A phandle pointing to the DMA controller. 402. The channel id. 41 42uart5: serial@e012a000 { 43 ... 44 dma-names = "tx", "rx"; 45 dmas = <&dma 26>, <&dma 27>; 46 ... 47}; 48