boards: nxp: support sai0 instance

enable sai0 clock
config sai0 pin
add codec8962 support

Signed-off-by: Lucien Zhao <[email protected]>

Author: lucien-nxp

boards/nxp/mimxrt700_evk/board.c

@@ -438,6 +438,14 @@ void board_early_init_hook(void)
 	CLOCK_AttachClk(kLPOSC_to_WWDT0);
 #endif
 
+#if DT_NODE_HAS_STATUS(DT_NODELABEL(sai0), okay)
+	/* SAI clock 368.64 / 15 = 24.576MHz */
+	CLOCK_AttachClk(kAUDIO_PLL_PFD3_to_AUDIO_VDD2);
+	CLOCK_AttachClk(kAUDIO_VDD2_to_SAI012);
+	CLOCK_SetClkDiv(kCLOCK_DivSai012Clk, 15U);
+	RESET_ClearPeripheralReset(kSAI0_RST_SHIFT_RSTn);
+#endif
+
 #if DT_NODE_HAS_STATUS(DT_NODELABEL(sc_timer), okay)
 	CLOCK_AttachClk(kFRO0_DIV6_to_SCT);
 #endif

boards/nxp/mimxrt700_evk/mimxrt700_evk-pinctrl.dtsi

@@ -20,6 +20,18 @@
 		};
 	};
 
+	pinmux_flexcomm2_i2c: pinmux_flexcomm2_i2c {
+		group0 {
+			pinmux = <LP_FLEXCOMM2_P0_PIO1_11>,
+				<LP_FLEXCOMM2_P1_PIO1_12>;
+			bias-pull-up;
+			input-enable;
+			slew-rate = "normal";
+			drive-strength = "high";
+			drive-open-drain;
+		};
+	};
+
 	pinmux_flexcomm8_i2c: pinmux_flexcomm8_i2c {
 		group0 {
 			pinmux = <LP_FLEXCOMM8_P0_PIO0_6>,
@@ -76,6 +88,21 @@
 		};
 	};
 
+	pinmux_sai0: pinmux_sai0 {
+		group0 {
+			pinmux = <CLKCTL0_MCLK_PIO0_21>,
+				<SAI0_RX_SYNC_PIO0_1>,
+				<SAI0_TX_BCLK_PIO0_3>,
+				<SAI0_RX_DATA0_PIO0_2>,
+				<SAI0_TX_DATA0_PIO0_4>,
+				<SAI0_RX_BCLK_PIO0_0>,
+				<SAI0_TX_SYNC_PIO0_5>;
+			drive-strength = "high";
+			slew-rate = "normal";
+			input-enable;
+		};
+	};
+
 	pinmux_sctimer: pinmux_sctimer {
 		group0 {
 			pinmux = <SCT0_IN0_PIO0_0>;

boards/nxp/mimxrt700_evk/mimxrt700_evk_mimxrt798s_cm33_cpu0.dts

@@ -22,6 +22,8 @@
 		sw1 = &user_button_2;
 		watchdog0 = &wwdt0;
 		pwm-0 = &sc_timer;
+		i2s-codec-tx = &sai0;
+		i2s-tx = &sai0;
 	};
 
 	chosen {
@@ -127,6 +129,27 @@
 	pinctrl-names = "default";
 };
 
+&flexcomm2{
+	status = "okay";
+};
+
+&flexcomm2_lpi2c2 {
+	status = "okay";
+	pinctrl-0 = <&pinmux_flexcomm2_i2c>;
+	pinctrl-names = "default";
+	clock-frequency = <I2C_BITRATE_STANDARD>;
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	audio_codec: wm8962@1a {
+		compatible = "wolfson,wm8962";
+		reg = <0x1a>;
+		clock-source = "MCLK";
+		clocks = <&clkctl0 MCUX_SAI0_CLK>;
+		clock-names = "mclk";
+	};
+};
+
 &flexcomm8{
 	status = "okay";
 };
@@ -177,6 +200,12 @@ zephyr_lcdif: &lcdif {};
 	status = "okay";
 };
 
+&sai0 {
+	status = "okay";
+	pinctrl-0 = <&pinmux_sai0>;
+	pinctrl-names = "default";
+};
+
 &sc_timer {
 	status = "okay";
 	pinctrl-0 = <&pinmux_sctimer>;

boards/nxp/mimxrt700_evk/mimxrt700_evk_mimxrt798s_cm33_cpu0_defconfig

@@ -1,5 +1,5 @@
 #
-# Copyright 2024 NXP
+# Copyright 2024-2025 NXP
 #
 # SPDX-License-Identifier: Apache-2.0
 #
@@ -15,3 +15,5 @@ CONFIG_HW_STACK_PROTECTION=y
 
 # Enable TrustZone-M
 CONFIG_TRUSTED_EXECUTION_SECURE=y
+# Nocache memory options
+CONFIG_NOCACHE_MEMORY=y