From: Marcus Cooper codekipper@gmail.com

Add devicetree bindings for the SPDIF transceiver found on found on Allwinners A10, A20 and A31 SoCs.

Signed-off-by: Marcus Cooper codekipper@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"; +};