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@xxxxxxxxxx>
Cc: Rob Herring <rob.herring@xxxxxxxxxxx>
Cc: Pawel Moll <pawel.moll@xxxxxxx>
Cc: Mark Rutland <mark.rutland@xxxxxxx>
Cc: Stephen Warren <swarren@xxxxxxxxxxxxx>
Cc: Ian Campbell <ijc+devicetree@xxxxxxxxxxxxxx>
Cc: devicetree@xxxxxxxxxxxxxxx
---
.../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";
+ };
--
1.8.0
--
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