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| author | Richard Genoud <richard.genoud@gmail.com> | 2013-07-30 12:32:04 +0200 |
|---|---|---|
| committer | Mark Brown <broonie@linaro.org> | 2013-08-06 18:12:25 +0100 |
| commit | f813175aa54367f455d8bb96f8f5ac2cec924528 (patch) | |
| tree | 5331be3d20f85f5335a2096c515880409f9b2ba6 | |
| parent | fdbcb3cba54b29a37dfe42acdc0e72c543e0807d (diff) | |
| download | linux-f813175aa54367f455d8bb96f8f5ac2cec924528.tar.bz2 | |
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: Richard Genoud <richard.genoud@gmail.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
| -rw-r--r-- | Documentation/devicetree/bindings/misc/atmel-ssc.txt | 23 |
1 files changed, 22 insertions, 1 deletions
diff --git a/Documentation/devicetree/bindings/misc/atmel-ssc.txt b/Documentation/devicetree/bindings/misc/atmel-ssc.txt index 38e51ad2e07e..a45ae08c8ed1 100644 --- a/Documentation/devicetree/bindings/misc/atmel-ssc.txt +++ b/Documentation/devicetree/bindings/misc/atmel-ssc.txt @@ -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"; +}; |