tests: drivers: pwm: add overlay file for imx943_evk m33

Add overlay file for imx943_evk m33 to use flexio as pwm

Signed-off-by: Biwen Li <biwen.li@nxp.com>

Author: biwenli

boards/nxp/imx943_evk/imx943_evk-pinctrl.dtsi

@@ -157,6 +157,14 @@
 
 	};
 
+	flexio1_io5_default: flexio1_io5_default {
+		group0 {
+			pinmux =
+				<&iomuxc_gpio_io31_flexio_1_3_mux1_flexio5_flexio_1_3_mux1_flexio5>;
+			slew-rate = "slightly_fast";
+			drive-strength = "x4";
+		};
+	};
 
 	lpuart1_default: lpuart1_default {
 		group0 {

boards/nxp/imx943_evk/imx943_evk_mimx94398_m33.dts

@@ -83,6 +83,22 @@
 	status = "disabled";
 };
 
+&flexio1 {
+	status = "okay";
+	/* Signal can be checked by the connector J44 Pin10(M1_LED_TP1) via logic analyzer */
+	flexio1_pwm: flexio1_pwm {
+		compatible = "nxp,flexio-pwm";
+		#pwm-cells = <3>;
+		pinctrl-0 = <&flexio1_io5_default>;
+		pinctrl-names = "default";
+		pwm_1 {
+			pin-id = <5>;
+			prescaler = <1>;
+		};
+		status = "okay";
+	};
+};
+
 &lpuart8 {
 	status = "okay";
 	current-speed = <115200>;

boards/nxp/imx943_evk/imx943_evk_mimx94398_m33.yaml

@@ -17,4 +17,5 @@ supported:
   - uart
   - netif:eth
   - gpio
+  - pwm
 vendor: nxp

dts/arm/nxp/nxp_imx943_m33.dtsi

@@ -169,6 +169,38 @@
 			status = "disabled";
 		};
 
+		flexio1: flexio@425c0000 {
+			compatible = "nxp,flexio";
+			reg = <0x425c0000 DT_SIZE_K(4)>;
+			interrupts = <48 0>;
+			clocks = <&scmi_clk IMX943_CLK_FLEXIO1>;
+			status = "disabled";
+		};
+
+		flexio2: flexio@425d0000 {
+			compatible = "nxp,flexio";
+			reg = <0x425d0000 DT_SIZE_K(4)>;
+			interrupts = <49 0>;
+			clocks = <&scmi_clk IMX943_CLK_FLEXIO2>;
+			status = "disabled";
+		};
+
+		flexio3: flexio@4d100000 {
+			compatible = "nxp,flexio";
+			reg = <0x4d100000 DT_SIZE_K(4)>;
+			interrupts = <50 0>;
+			clocks = <&scmi_clk IMX943_CLK_FLEXIO3>;
+			status = "disabled";
+		};
+
+		flexio4: flexio@4d110000 {
+			compatible = "nxp,flexio";
+			reg = <0x4d110000 DT_SIZE_K(4)>;
+			interrupts = <51 0>;
+			clocks = <&scmi_clk IMX943_CLK_FLEXIO4>;
+			status = "disabled";
+		};
+
 		gpio2: gpio@43810000 {
 			compatible = "nxp,imx-rgpio";
 			reg = <0x43810000 DT_SIZE_K(64)>;

tests/drivers/pwm/pwm_api/boards/imx943_evk_mimx94398_m33.overlay

@@ -0,0 +1,14 @@
+/*
+ * Copyright 2025 NXP
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/ {
+	aliases {
+		/*
+		 * Check signal from the connector J44 Pin10(M1_LED_TP1) via logic analyzer.
+		 */
+		pwm-1 = &flexio1_pwm;
+	};
+};