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
* A DMA interface for the transmit 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
---
Changes since v1:
* Use <&a ...>, <&b ...> instead of <&a ..., &b ...> in the examples
---
.../devicetree/bindings/sound/adi,axi-spdif-tx.txt | 30 ++++++++++++++++++++++
1 file changed, 30 insertions(+)
create mode 100644 Documentation/devicetree/bindings/sound/adi,axi-spdif-tx.txt
diff --git a/Documentation/devicetree/bindings/sound/adi,axi-spdif-tx.txt b/Documentation/devicetree/bindings/sound/adi,axi-spdif-tx.txt
new file mode 100644
index 0000000..46f3449
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/adi,axi-spdif-tx.txt
@@ -0,0 +1,30 @@
+ADI AXI-SPDIF controller
+
+Required properties:
+ - compatible : Must be "adi,axi-spdif-1.00.a"
+ - reg : Must contain SPDIF core's registers location and length
+ - clocks : Pairs of phandle and specifier referencing the controller's clocks.
+ The controller expects two clocks, the clock used for the AXI interface and
+ the clock used as the sampling rate reference clock sample.
+ - clock-names: "axi" for the clock to the AXI interface, "ref" for the sample
+ rate reference clock.
+ - dmas: Pairs of phandle and specifier for the DMA channel that is used by
+ the core. The core expects one dma channel for transmit.
+ - dma-names : Must be "tx"
+
+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:
+
+ spdif: spdif@0x77400000 {
+ compatible = "adi,axi-spdif-tx-1.00.a";
+ reg = <0x77600000 0x1000>;
+ clocks = <&clk 15>, <&audio_clock>;
+ clock-names = "axi", "ref";
+ dmas = <&ps7_dma 0>;
+ dma-names = "tx";
+ };
--
1.8.0
--
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