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: NBo Shen <voice.shen@atmel.com>
Acked-by: NNicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: NMark Brown <broonie@linaro.org>

Document the clock properties required by the atmel-ssc driver.
Signed-off-by: NBoris BREZILLON <b.brezillon@overkiz.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

As atmel-ssc can be used with DMA, the documentation should be updated.
Also, a configuration DMA example is given.
Signed-off-by: NRichard Genoud <richard.genoud@gmail.com>
Signed-off-by: NMark Brown <broonie@linaro.org>

Add atmel-ssc for device tree support

Match "atmel,at91rm9200-ssc" for using pdc for data transfer
Match "atmel,at91sam9g45-ssc" for using dma for data transfer
Signed-off-by: NBo Shen <voice.shen@atmel.com>
Acked-by: NNicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>