00e6cb2aed
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 * One DMA interface each for the transmit and receive data Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Cc: Rob Herring <rob.herring@calxeda.com> Cc: Pawel Moll <pawel.moll@arm.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Stephen Warren <swarren@wwwdotorg.org> Cc: Ian Campbell <ijc+devicetree@hellion.org.uk> Cc: devicetree@vger.kernel.org Signed-off-by: Mark Brown <broonie@linaro.org>
32 lines
1.1 KiB
Plaintext
32 lines
1.1 KiB
Plaintext
ADI AXI-I2S controller
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Required properties:
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- compatible : Must be "adi,axi-i2s-1.00.a"
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- reg : Must contain I2S core's registers location and length
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- clocks : Pairs of phandle and specifier referencing the controller's clocks.
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The controller expects two clocks, the clock used for the AXI interface and
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the clock used as the sampling rate reference clock sample.
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- clock-names : "axi" for the clock to the AXI interface, "ref" for the sample
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rate reference clock.
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- dmas: Pairs of phandle and specifier for the DMA channels that are used by
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the core. The core expects two dma channels, one for transmit and one for
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receive.
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- dma-names : "tx" for the transmit channel, "rx" for the receive channel.
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For more details on the 'dma', 'dma-names', 'clock' and 'clock-names' properties
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please check:
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* resource-names.txt
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* clock/clock-bindings.txt
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* dma/dma.txt
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Example:
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i2s: i2s@0x77600000 {
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compatible = "adi,axi-i2s-1.00.a";
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reg = <0x77600000 0x1000>;
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clocks = <&clk 15>, <&audio_clock>;
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clock-names = "axi", "ref";
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dmas = <&ps7_dma 0>, <&ps7_dma 1>;
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dma-names = "tx", "rx";
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};
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