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dt-bindings: ASoC: xlnx, i2s: Document i2s bindings 

Added documentation for I2S IP core DT bindings.

Signed-off-by: Maruthi Srinivas Bayyavarapu <maruthi.srinivas.bayyavarapu@xilinx.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
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Maruthi Srinivas Bayyavarapu 2018-12-08 00:02:36 +05:30 committed by Mark Brown
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Documentation/devicetree/bindings/sound/xlnx,i2s.txt 100644
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Device-Tree bindings for Xilinx I2S PL block
The IP supports I2S based playback/capture audio
Required property:
- compatible: "xlnx,i2s-transmitter-1.0" for playback and
"xlnx,i2s-receiver-1.0" for capture
Required property common to both I2S playback and capture:
- reg: Base address and size of the IP core instance.
- xlnx,dwidth: sample data width. Can be any of 16, 24.
- xlnx,num-channels: Number of I2S streams. Can be any of 1, 2, 3, 4.
supported channels = 2 * xlnx,num-channels
Example:
i2s_receiver@a0080000 {
compatible = "xlnx,i2s-receiver-1.0";
reg = <0x0 0xa0080000 0x0 0x10000>;
xlnx,dwidth = <0x18>;
xlnx,num-channels = <1>;
};
i2s_transmitter@a0090000 {
compatible = "xlnx,i2s-transmitter-1.0";
reg = <0x0 0xa0090000 0x0 0x10000>;
xlnx,dwidth = <0x18>;
xlnx,num-channels = <1>;
};