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Binding: atmel-ssc: add option to choose clock

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Add the option to choose clock on which pin input to SSC (as slave).
Default is on TK pin to SSC, add "atmel,clk-from-rk-pin" option to
specify the clock is on RK pin to SSC.

Signed-off-by: Bo Shen <voice.shen@atmel.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
This commit is contained in:
Bo Shen 2014-02-10 14:09:46 +08:00 committed by Mark Brown
parent 048d4ff81f
commit a69d0009aa
1 changed files with 8 additions and 0 deletions
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8
Documentation/devicetree/bindings/misc/atmel-ssc.txt
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@ -17,6 +17,14 @@ Required properties for devices compatible with "atmel,at91sam9g45-ssc":
See Documentation/devicetree/bindings/dma/atmel-dma.txt for details.
- dma-names: Must be "tx", "rx".
Optional properties:
- atmel,clk-from-rk-pin: bool property.
- When SSC works in slave mode, according to the hardware design, the
clock can get from TK pin, and also can get from RK pin. So, add
this parameter to choose where the clock from.
- By default the clock is from TK pin, if the clock from RK pin, this
property is needed.
Examples:
- PDC transfer:
ssc0: ssc@fffbc000 {