2013/7/9 Mark Brown [off-list ref]:

On Tue, Jul 09, 2013 at 04:25:29PM +0200, Richard Genoud wrote:

quoted

 - 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...

quoted

-Example:
+Examples:
 ssc0: ssc at 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.