boards: nxp: frdm_mcxa156: Support lpuart1 for NXP frdm_mcxa156 board

Support lpuart1 for NXP frdm_mcxa156 board.

Signed-off-by: Neil Chen <[email protected]>

Author: NeilChen93

boards/nxp/frdm_mcxa156/board.c

@@ -116,6 +116,11 @@ static int frdm_mcxa156_init(void)
 	CLOCK_AttachClk(kFRO12M_to_LPUART0);
 #endif
 
+#if DT_NODE_HAS_STATUS_OKAY(DT_NODELABEL(lpuart1))
+	CLOCK_SetClockDiv(kCLOCK_DivLPUART1, 1u);
+	CLOCK_AttachClk(kFRO12M_to_LPUART1);
+#endif
+
 #if DT_NODE_HAS_STATUS_OKAY(DT_NODELABEL(ctimer0))
 	CLOCK_SetClockDiv(kCLOCK_DivCTIMER0, 1u);
 	CLOCK_AttachClk(kFRO_HF_to_CTIMER0);

boards/nxp/frdm_mcxa156/frdm_mcxa156-pinctrl.dtsi

@@ -16,6 +16,15 @@
 			input-enable;
 		};
 	};
+	pinmux_lpuart1: pinmux_lpuart1 {
+		group0 {
+			pinmux = <LPUART1_RXD_P3_20>,
+				<LPUART1_TXD_P3_21>;
+			drive-strength = "low";
+			slew-rate = "fast";
+			input-enable;
+		};
+	};
 	pinmux_dac0: pinmux_dac0 {
 		group0 {
 			pinmux = <DAC0_OUT_P2_2>;

boards/nxp/frdm_mcxa156/frdm_mcxa156.dts

@@ -107,6 +107,13 @@
 	pinctrl-names = "default";
 };
 
+&lpuart1 {
+	status = "okay";
+	current-speed = <115200>;
+	pinctrl-0 = <&pinmux_lpuart1>;
+	pinctrl-names = "default";
+};
+
 &ctimer0 {
 	status = "okay";
 };