2013/7/9 Richard Genoud richard.genoud@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.genoud@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