1 * ARM PrimeCell PL330 DMA Controller
3 The ARM PrimeCell PL330 DMA controller can move blocks of memory contents
4 between memory and peripherals or memory to memory.
7 - compatible: should include both "arm,pl330" and "arm,primecell".
8 - reg: physical base address of the controller and length of memory mapped
10 - interrupts: interrupt number to the cpu.
13 - dma-coherent : Present if dma operations are coherent
14 - #dma-cells: must be <1>. used to represent the number of integer
15 cells in the dmas property of client device.
16 - dma-channels: contains the total number of DMA channels supported by the DMAC
17 - dma-requests: contains the total number of DMA requests supported by the DMAC
21 pdma0: pdma@12680000 {
22 compatible = "arm,pl330", "arm,primecell";
23 reg = <0x12680000 0x1000>;
30 Client drivers (device nodes requiring dma transfers from dev-to-mem or
31 mem-to-dev) should specify the DMA channel numbers and dma channel names
34 [property name] = <[phandle of the dma controller] [dma request id]>;
35 [property name] = <[dma channel name]>
37 where 'dma request id' is the dma request number which is connected
38 to the client controller. The 'property name' 'dmas' and 'dma-names'
39 as required by the generic dma device tree binding helpers. The dma
40 names correspond 1:1 with the dma request ids in the dmas property.
42 Example: dmas = <&pdma0 12
44 dma-names = "tx", "rx";