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+DesignWare I2S controller
+
+Required properties:
+ - compatible : Must be "snps,designware-i2s"
+ - reg : Must contain the I2S core's registers location and length
+ - clocks : Pairs of phandle and specifier referencing the controller's
+ clocks. The controller expects one clock: the clock used as the sampling
+ rate reference clock sample.
+ - clock-names : "i2sclk" for the sample rate reference clock.
+ - dmas: Pairs of phandle and specifier for the DMA channels that are used by
+ the core. The core expects one or two dma channels: one for transmit and
+ one for receive.
+ - dma-names : "tx" for the transmit channel, "rx" for the receive channel.
+
+Optional properties:
+ - interrupts: The interrupt line number for the I2S controller. Add this
+ parameter if the I2S controller that you are using does not support DMA.
+
+For more details on the 'dma', 'dma-names', 'clock' and 'clock-names'
+properties please check:
+ * resource-names.txt
+ * clock/clock-bindings.txt
+ * dma/dma.txt
+
+Example:
+
+ soc_i2s: i2s@7ff90000 {
+ compatible = "snps,designware-i2s";
+ reg = <0x0 0x7ff90000 0x0 0x1000>;
+ clocks = <&scpi_i2sclk 0>;
+ clock-names = "i2sclk";
+ #sound-dai-cells = <0>;
+ dmas = <&dma0 5>;
+ dma-names = "tx";
+ };