From: Marcus Cooper <codekip...@gmail.com>
Add devicetree bindings for the SPDIF transceiver found on
found on Allwinners A10, A20 and A31 SoCs.
Signed-off-by: Marcus Cooper <codekip...@gmail.com>
---
.../devicetree/bindings/sound/sunxi,spdif.txt | 49 ++++++++++++++++++++++
1 file changed, 49 insertions(+)
create mode 100644 Documentation/devicetree/bindings/sound/sunxi,spdif.txt
diff --git a/Documentation/devicetree/bindings/sound/sunxi,spdif.txt
b/Documentation/devicetree/bindings/sound/sunxi,spdif.txt
new file mode 100644
index 0000000..1868722
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/sunxi,spdif.txt
@@ -0,0 +1,49 @@
+Allwinner Sony/Philips Digital Interface Format (S/PDIF) Controller
+
+The Allwinner S/PDIF audio block is a transceiver that allows the
+processor to receive and transmit digital audio via an coaxial cable or
+a fibre cable.
+
+Required properties:
+
+ - compatible : should be one of the following:
+ - "allwinner,sun4i-a10-spdif": for the Allwinner A10 SoC
+ - "allwinner,sun7i-a20-spdif": for the Allwinner A20 SoC
+ - "allwinner,sun6i-a31-spdif": for the Allwinner A31 SoC
+
+ - reg : Offset and length of the register set for the
device.
+
+ - interrupts : Contains the spdif interrupt.
+
+ - dmas : Generic dma devicetree binding as described in
+ Documentation/devicetree/bindings/dma/dma.txt.
+
+ - dma-names : Two dmas have to be defined, "tx" and "rx".
+
+ - clocks : Contains an entry for each entry in clock-names.
+
+ - clock-names : Includes the following entries:
+ "apb" clock for the spdif bus.
+ "audio" clock from the audio pll.
+ "spdif" clock for spdif controller.
+
+Optional:
+
+ - spdif-in : Enable block for capturing an SPDIF signal.
+
+ - spdif-out : Enable block for transmitting an SPDIF signal.
+
+Example:
+
+spdif: spdif@01c21000 {
+ compatible = "allwinner,sun4i-a10-spdif";
+ reg = <0x01c21000 0x40>;
+ interrupts = <13>;
+ clocks = <&apb0_gates 1>, <&pll2 0>, <&spdif_clk>;
+ clock-names = "apb", "audio", "spdif";
+ dmas = <&dma 0 2>, <&dma 0 2>;
+ dma-names = "rx", "tx";
+ spdif-in = "disabled";
+ spdif-out = "okay";
+ status = "okay";
+};
--
2.5.3
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