2013/7/9 Richard Genoud <richard.gen...@gmail.com>: > 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.gen...@gmail.com> > --- > .../devicetree/bindings/misc/atmel-ssc.txt | 24 > ++++++++++++++++++-- > 1 file changed, 22 insertions(+), 2 deletions(-) > > diff --git a/Documentation/devicetree/bindings/misc/atmel-ssc.txt > b/Documentation/devicetree/bindings/misc/atmel-ssc.txt > index 38e51ad..96958ca 100644 > --- a/Documentation/devicetree/bindings/misc/atmel-ssc.txt > +++ b/Documentation/devicetree/bindings/misc/atmel-ssc.txt > @@ -6,10 +6,30 @@ Required properties: > - atmel,at91sam9g45-ssc: support dma transfer > - reg: Should contain SSC registers location and length > - interrupts: Should contain SSC interrupt > +For dma transfer: > +- 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". > > -Example: > + > +Examples: > ssc0: ssc@fffbc000 { > compatible = "atmel,at91rm9200-ssc"; > reg = <0xfffbc000 0x4000>; > - interrupts = <14 4 5>; > + interrupts = <14 IRQ_TYPE_LEVEL_HIGH 5>; maybe I should not use macro in the documentation (not sure if I should or not). > }; > + > + > +ssc0: ssc@f0010000 { > + compatible = "atmel,at91sam9g45-ssc"; > + reg = <0xf0010000 0x4000>; > + interrupts = <28 IRQ_TYPE_LEVEL_HIGH 5>; > + dmas = <&dma0 1 AT91_DMA_CFG_PER_ID(13)>, > + <&dma0 1 AT91_DMA_CFG_PER_ID(14)>; same here > + dma-names = "tx", "rx"; > + pinctrl-names = "default"; > + pinctrl-0 = <&pinctrl_ssc0_tx &pinctrl_ssc0_rx>; > + status = "disabled"; > +}; > + > -- > 1.7.10.4 >
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