From cbcbe7f43dfab6ca38a4ef4506af2b36dfbe550d Mon Sep 17 00:00:00 2001
From: Daniel DeGrasse <daniel.degrasse@nxp.com>
Date: Thu, 4 Apr 2024 10:28:55 -0500
Subject: [PATCH] boards: nxp: frdm_mcxn947: add pinctrl for LPUART2

Add pinctrl and board enablement for LPUART2, which is broken out to
P4_2 and P4_3 on the FRDM board.

Signed-off-by: Daniel DeGrasse <daniel.degrasse@nxp.com>
---
 boards/nxp/frdm_mcxn947/frdm_mcxn947-pinctrl.dtsi     | 10 ++++++++++
 boards/nxp/frdm_mcxn947/frdm_mcxn947.dtsi             |  6 ++++++
 boards/nxp/frdm_mcxn947/frdm_mcxn947_mcxn947_cpu0.dts |  8 ++++++++
 3 files changed, 24 insertions(+)

diff --git a/boards/nxp/frdm_mcxn947/frdm_mcxn947-pinctrl.dtsi b/boards/nxp/frdm_mcxn947/frdm_mcxn947-pinctrl.dtsi
index 3bd948c668c..13bd6950920 100644
--- a/boards/nxp/frdm_mcxn947/frdm_mcxn947-pinctrl.dtsi
+++ b/boards/nxp/frdm_mcxn947/frdm_mcxn947-pinctrl.dtsi
@@ -31,6 +31,16 @@
 		};
 	};
 
+	pinmux_flexcomm2_lpuart: pinmux_flexcomm2_lpuart {
+		group0 {
+			pinmux = <FC2_P2_PIO4_2>,
+				<FC2_P3_PIO4_3>;
+			slew-rate = "fast";
+			drive-strength = "low";
+			input-enable;
+		};
+	};
+
 	pinmux_flexcomm4_lpuart: pinmux_flexcomm4_lpuart {
 		group0 {
 			pinmux = <FC4_P0_PIO1_8>,
diff --git a/boards/nxp/frdm_mcxn947/frdm_mcxn947.dtsi b/boards/nxp/frdm_mcxn947/frdm_mcxn947.dtsi
index 3b95bc74351..22323d6422c 100644
--- a/boards/nxp/frdm_mcxn947/frdm_mcxn947.dtsi
+++ b/boards/nxp/frdm_mcxn947/frdm_mcxn947.dtsi
@@ -61,6 +61,12 @@
 	clock-frequency = <I2C_BITRATE_STANDARD>;
 };
 
+&flexcomm2_lpuart2 {
+	current-speed = <115200>;
+	pinctrl-0 = <&pinmux_flexcomm2_lpuart>;
+	pinctrl-names = "default";
+};
+
 &flexcomm4_lpuart4 {
 	current-speed = <115200>;
 	pinctrl-0 = <&pinmux_flexcomm4_lpuart>;
diff --git a/boards/nxp/frdm_mcxn947/frdm_mcxn947_mcxn947_cpu0.dts b/boards/nxp/frdm_mcxn947/frdm_mcxn947_mcxn947_cpu0.dts
index ba08325ae0a..2f587614580 100644
--- a/boards/nxp/frdm_mcxn947/frdm_mcxn947_mcxn947_cpu0.dts
+++ b/boards/nxp/frdm_mcxn947/frdm_mcxn947_mcxn947_cpu0.dts
@@ -85,6 +85,14 @@
 	status = "okay";
 };
 
+/*
+ *LPFLEXCOMM supports UART and I2C on the same instance, enable this for
+ * LFLEXCOMM2
+ */
+&flexcomm2_lpuart2 {
+	status = "okay";
+};
+
 &flexcomm4 {
 	status = "okay";
 };