This patch adds the devicetree documentation for the ADI AXI-SPDIF audio controller. The controller has: * One set of memory mapped register * Two clocks, one for the memory mapped register interface, one used as the audio reference clock * One DMA interface each for the transmit and receive data
Signed-off-by: Lars-Peter Clausen lars@metafoo.de Cc: Rob Herring rob.herring@calxeda.com Cc: Pawel Moll pawel.moll@arm.com Cc: Mark Rutland mark.rutland@arm.com Cc: Stephen Warren swarren@wwwdotorg.org Cc: Ian Campbell ijc+devicetree@hellion.org.uk Cc: devicetree@vger.kernel.org --- .../devicetree/bindings/sound/adi,axi-i2s.txt | 29 ++++++++++++++++++++++ 1 file changed, 29 insertions(+) create mode 100644 Documentation/devicetree/bindings/sound/adi,axi-i2s.txt
diff --git a/Documentation/devicetree/bindings/sound/adi,axi-i2s.txt b/Documentation/devicetree/bindings/sound/adi,axi-i2s.txt new file mode 100644 index 0000000..d9c0e53 --- /dev/null +++ b/Documentation/devicetree/bindings/sound/adi,axi-i2s.txt @@ -0,0 +1,29 @@ +ADI AXI-I2S controller + +Required properties: + - compatible : Must be "adi,axi-i2s-1.00.a" + - reg : Must contain I2S registers location and length + - clocks : Clock specifier providing a handle to the controller's clocks. The + controller expects two clocks, the clock used for the AXI interface and the + clock used as thei sampling rate reference clock sample. + - clock-names : "axi" for the clock to the AXI interface, "ref" for the sample + rate reference clock. + - dma : Specifiers for the DMA channels that are used by the core. + - dma-names : "tx" for the transmit channel, "rx" for the receive channel. + +For more details on the 'dma', 'dma-names', 'clock' and 'clock-names' properties +please check: + * resource-names.txt + * clock/clock-bindings.txt + * dma/dma.txt + +Example: + + i2s: i2s@0x77600000 { + compatible = "adi,axi-i2s-1.00.a"; + reg = <0x77600000 0x1000>; + clocks = <&clk 15 &audio_clock>; + clock-names = "axi", "ref"; + dmas = <&ps7_dma 0 &ps7_dma 1>; + dma-names = "tx", "rx"; + };