1* ARM PrimeCell PL330 DMA Controller
2
3The ARM PrimeCell PL330 DMA controller can move blocks of memory contents
4between memory and peripherals or memory to memory.
5
6Required properties:
7  - compatible: should include both "arm,pl330" and "arm,primecell".
8  - reg: physical base address of the controller and length of memory mapped
9    region.
10  - interrupts: interrupt number to the cpu.
11
12Optional properties:
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
18  - arm,pl330-broken-no-flushp: quirk for avoiding to execute DMAFLUSHP
19  - arm,pl330-periph-burst: quirk for performing burst transfer only
20  - resets: contains an entry for each entry in reset-names.
21	    See ../reset/reset.txt for details.
22  - reset-names: must contain at least "dma", and optional is "dma-ocp".
23
24Example:
25
26	pdma0: pdma@12680000 {
27		compatible = "arm,pl330", "arm,primecell";
28		reg = <0x12680000 0x1000>;
29		interrupts = <99>;
30		#dma-cells = <1>;
31		#dma-channels = <8>;
32		#dma-requests = <32>;
33	};
34
35Client drivers (device nodes requiring dma transfers from dev-to-mem or
36mem-to-dev) should specify the DMA channel numbers and dma channel names
37as shown below.
38
39  [property name]  = <[phandle of the dma controller] [dma request id]>;
40  [property name]  = <[dma channel name]>
41
42      where 'dma request id' is the dma request number which is connected
43      to the client controller. The 'property name' 'dmas' and 'dma-names'
44      as required by the generic dma device tree binding helpers. The dma
45      names correspond 1:1 with the dma request ids in the dmas property.
46
47  Example:  dmas = <&pdma0 12
48		    &pdma1 11>;
49	    dma-names = "tx", "rx";
50