MLK-14997-3: Document: Add fsl,hifi4 compatibility document

add hifi4 document

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

diff --git a/Documentation/devicetree/bindings/sound/fsl,hifi4.txt b/Documentation/devicetree/bindings/sound/fsl,hifi4.txt
new file mode 100644 (file)
index 0000000..a82b25a
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/fsl,hifi4.txt
@@ -0,0 +1,16 @@
+NXP HIFI4 DSP (HIFI4)
+
+The IP is from Cadence.
+
+Required properties:
+
+  - compatible : Contains "fsl,imx8qxp-hifi4".
+  - reg                : Offset and length of the register set for the device.
+
+Example:
+
+hifi4:  hifi4@596e8000 {
+       compatible = "fsl,imx8qxp-hifi4";
+       reg = <0x0 0x596e8000 0x0 0x88000>;
+       status = "okay";
+};