2013/7/9 Mark Brown broonie@kernel.org:
On Tue, Jul 09, 2013 at 04:25:29PM +0200, Richard Genoud wrote:
- 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".
This is added as a required property so...
-Example: +Examples: ssc0: ssc@fffbc000 { compatible = "atmel,at91rm9200-ssc"; reg = <0xfffbc000 0x4000>; interrupts = <14 4 5>; };
...this first example is now invalid and should probably just be being extended with the new required properties.
Well, I have to rewrite that to make it clearer. The thing is: with "atmel,at91rm9200-ssc" the SSC doesn't work with DMA. with "atmel,at91sam9g45-ssc", the SSC work ONLY with DMA.
So the dmas/dma-names properties are only required for g45-ssc, and useless for rm9200-ssc
Maybe the best will be to write a paragraph for g45-ssc and another for rm9200-ssc, even if there's some identical lines between them.
Thanks !
Richard.