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Commit f813175a authored by Richard Genoud's avatar Richard Genoud Committed by Mark Brown
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ASoC: atmel: update atmel SSC with DMA binding 



As atmel-ssc can be used with DMA, the documentation should be updated.
Also, a configuration DMA example is given.

Signed-off-by: default avatarRichard Genoud <richard.genoud@gmail.com>
Signed-off-by: default avatarMark Brown <broonie@linaro.org>
parent fdbcb3cb

Documentation/devicetree/bindings/misc/atmel-ssc.txt

+22 −1
Original line number Diff line number Diff line
@@ -7,9 +7,30 @@ Required properties: 
- reg: Should contain SSC registers location and length

- interrupts: Should contain SSC interrupt



Example:



Required properties for devices compatible with "atmel,at91sam9g45-ssc":

- dmas: DMA specifier, consisting of a phandle to DMA controller node,

  the memory interface and SSC DMA channel ID (for tx and rx).

  See Documentation/devicetree/bindings/dma/atmel-dma.txt for details.

- dma-names: Must be "tx", "rx".



Examples:

- PDC transfer:

ssc0: ssc@fffbc000 {

	compatible = "atmel,at91rm9200-ssc";

	reg = <0xfffbc000 0x4000>;

	interrupts = <14 4 5>;

};



- DMA transfer:

ssc0: ssc@f0010000 {

      compatible = "atmel,at91sam9g45-ssc";

      reg = <0xf0010000 0x4000>;

      interrupts = <28 4 5>;

      dmas = <&dma0 1 13>,

	     <&dma0 1 14>;

      dma-names = "tx", "rx";

      pinctrl-names = "default";

      pinctrl-0 = <&pinctrl_ssc0_tx &pinctrl_ssc0_rx>;

      status = "disabled";

};