ENGR00274585-4 ASoC: fsl: add esai driver

add esai driver.
add bindings documentation of esai

Signed-off-by: Shengjiu Wang <b02247@freescale.com>

1 files changed, 26 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/sound/fsl-easi.txt b/Documentation/devicetree/bindings/sound/fsl-easi.txt
new file mode 100644
index 000000000000..b6196622accd
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/fsl-easi.txt
@@ -0,0 +1,26 @@
+* Freescale Enhanced Serial Audio Interface (ESAI)
+
+Required properties:
+  - compatible: Should be "fsl,<chip>-esai".
+  - reg: Offset and length of the register set for the device.
+  - interrupts: Contains ESAI interrupt.
+  - clocks: Contains an entry for each entry in clock-names.
+  - fsl,fifo-depth: The number of elements in the transmit and receive FIFOs.
+                    This number is the maximum allowed value for TFCR[TFWM].
+  - fsl,esai-dma-events: The dma event of the esai, <a b>, a is the tx dma.
+			 b is the rx dma.
+  - fsl,flags: <1> is for ESAI network mode, <2> is for ESAI SYNC mode.
+	       <3> is for network and SYNC mode.
+
+Example:
+
+esai: esai@02024000 {
+	compatible = "fsl,imx6q-esai";
+	reg = <0x02024000 0x4000>;
+	interrupts = <0 51 0x04>;
+	clocks = <&clks 118>;
+	fsl,fifo-depth = <128>;
+	fsl,esai-dma-events = <24 23>;
+	fsl,flags = <1>;
+	status = "disabled";
+};