bindings/dma/fsl-imx-dma.txt

1 * Freescale Direct Memory Access (DMA) Controller for i.MX
3 This document will only describe differences to the generic DMA Controller and
4 DMA request bindings as described in dma/dma.txt .
6 * DMA controller
9 - compatible : Should be "fsl,<chip>-dma". chip can be imx1, imx21 or imx27
10 - reg : Should contain DMA registers location and length
11 - interrupts : First item should be DMA interrupt, second one is optional and
12     should contain DMA Error interrupt
13 - #dma-cells : Has to be 1. imx-dma does not support anything else.
16 - dma-channels : Number of DMA channels supported. Should be 16.
17 - #dma-channels : deprecated
18 - dma-requests : Number of DMA requests supported.
19 - #dma-requests : deprecated
23 	dma: dma@10001000 {
24 		compatible = "fsl,imx27-dma";
27 		#dma-cells = <1>;
28 		dma-channels = <16>;
32 * DMA client
34 Clients have to specify the DMA requests with phandles in a list.
37 - dmas: List of one or more DMA request specifiers. One DMA request specifier
38     consists of a phandle to the DMA controller followed by the integer
40 - dma-names: List of string identifiers for the DMA requests. For the correct
47 		dmas = <&dma 7>;
48 		dma-names = "rx-tx";