Hello. On 07/04/2014 11:36 AM, Ludovic Desroches wrote:
Add bindings documentation for the new Atmel DMA controller (XDMAC) introduced with SAMA5D4.
Signed-off-by: Ludovic Desroches <ludovic.desroches@xxxxxxxxx> --- .../devicetree/bindings/dma/atmel-xdma.txt | 39 ++++++++++++++++++++ 1 file changed, 39 insertions(+) create mode 100644 Documentation/devicetree/bindings/dma/atmel-xdma.txt
diff --git a/Documentation/devicetree/bindings/dma/atmel-xdma.txt b/Documentation/devicetree/bindings/dma/atmel-xdma.txt new file mode 100644 index 0000000..1e09fda --- /dev/null +++ b/Documentation/devicetree/bindings/dma/atmel-xdma.txt
[...]
+DMA clients connected to the Atmel XDMA controller must use the format +described in the dma.txt file, using a three-cell specifier for each channel: +a phandle plus two integer cells.
Specifiers do not include phandle.
+The two cells in order are:
s/two/three/?
+ +1. A phandle pointing to the DMA controller. +2. The memory interface (16 most significant bits), the peripheral interface +(16 less significant bits). +3. Channel configuration register. Configurable fields are: + - bit 30-24: PERID, peripheral identifier.
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