xref: /freebsd/sys/contrib/device-tree/Bindings/sound/fsl,spdif.txt (revision 95eb4b873b6a8b527c5bd78d7191975dfca38998) 
1Freescale Sony/Philips Digital Interface Format (S/PDIF) Controller
2
3The Freescale S/PDIF audio block is a stereo transceiver that allows the
4processor to receive and transmit digital audio via an coaxial cable or
5a fibre cable.
6
7Required properties:
8
9  - compatible		: Compatible list, should contain one of the following
10			  compatibles:
11			  "fsl,imx35-spdif",
12			  "fsl,vf610-spdif",
13			  "fsl,imx6sx-spdif",
14
15  - reg			: Offset and length of the register set for the device.
16
17  - interrupts		: Contains the spdif interrupt.
18
19  - dmas		: Generic dma devicetree binding as described in
20			  Documentation/devicetree/bindings/dma/dma.txt.
21
22  - dma-names		: Two dmas have to be defined, "tx" and "rx".
23
24  - clocks		: Contains an entry for each entry in clock-names.
25
26  - clock-names		: Includes the following entries:
27	"core"		  The core clock of spdif controller.
28	"rxtx<0-7>"	  Clock source list for tx and rx clock.
29			  This clock list should be identical to the source
30			  list connecting to the spdif clock mux in "SPDIF
31			  Transceiver Clock Diagram" of SoC reference manual.
32			  It can also be referred to TxClk_Source bit of
33			  register SPDIF_STC.
34	"spba"		  The spba clock is required when SPDIF is placed as a
35			  bus slave of the Shared Peripheral Bus and when two
36			  or more bus masters (CPU, DMA or DSP) try to access
37			  it. This property is optional depending on the SoC
38			  design.
39
40Optional properties:
41
42   - big-endian		: If this property is absent, the native endian mode
43			  will be in use as default, or the big endian mode
44			  will be in use for all the device registers.
45
46Example:
47
48spdif: spdif@2004000 {
49	compatible = "fsl,imx35-spdif";
50	reg = <0x02004000 0x4000>;
51	interrupts = <0 52 0x04>;
52	dmas = <&sdma 14 18 0>,
53	       <&sdma 15 18 0>;
54	dma-names = "rx", "tx";
55
56	clocks = <&clks 197>, <&clks 3>,
57	       <&clks 197>, <&clks 107>,
58	       <&clks 0>, <&clks 118>,
59	       <&clks 62>, <&clks 139>,
60	       <&clks 0>;
61	clock-names = "core", "rxtx0",
62		"rxtx1", "rxtx2",
63		"rxtx3", "rxtx4",
64		"rxtx5", "rxtx6",
65		"rxtx7";
66
67	big-endian;
68};
69