bindings: nxp,dai-sai: add configuration examples

Add some examples depicting how the SAI node may be configured.

Signed-off-by: Laurentiu Mihalcea <[email protected]>

dts/bindings/dai/nxp,dai-sai.yaml

@@ -1,7 +1,47 @@
 # Copyright 2023 NXP
 # SPDX-License-Identifier: Apache-2.0
 
-description: NXP Synchronous Audio Interface (SAI) node
+description: |
+  NXP Synchronous Audio Interface (SAI) node
+
+  Below you may find some configuration examples:
+
+  1) Configuring SAI1 for i.MX8QM MEK board
+
+  #include <zephyr/dt-bindings/clock/imx_ccm.h>
+
+  dai@59050000 {
+    compatible = "nxp,dai-sai";
+    reg = <0x59050000 DT_SIZE_K(64)>;
+    interrupt-parent = <&master5>;
+    interrupts = <28>;
+    clocks = <&ccm IMX_CCM_SAI1_CLK 0x0 0x0>;
+    clock-names = "bus";
+    dai-index = <1>;
+    dmas = <&edma0 15 0>, <&edma0 14 0>;
+    dma-names = "tx", "rx";
+    rx-fifo-watermark = <48>;
+    tx-fifo-watermark = <2>;
+    fifo-depth = <48>;
+    rx-sync-mode = <1>;
+  };
+
+  2) Configuring SAI6 for i.MX8ULP EVK9 board
+
+  dai@2da90000 {
+    compatible = "nxp,dai-sai";
+    reg = <0x2da90000 DT_SIZE_K(4)>;
+    interrupt-parent = <&clic>;
+    interrupts = <24 0 0>;
+    dmas = <&edma2 0 72>, <&edma2 1 71>;
+    dma-names = "tx", "rx";
+    dai-index = <6>;
+    rx-fifo-watermark = <8>;
+    tx-fifo-watermark = <1>;
+    fifo-depth = <8>;
+    rx-sync-mode = <1>;
+    tx-dataline = <2>;
+  };
 
 compatible: "nxp,dai-sai"