From 0ffe2f0006fd9f2040900a44d97e0a67ab8ff9b7 Mon Sep 17 00:00:00 2001
From: Neil Chen <cheng.chen_1@nxp.com>
Date: Sat, 12 Oct 2024 11:03:40 +0800
Subject: [PATCH] boards: nxp/frdm_mcxn236: Support lpadc for NXP frdm_mcxn236

Support lpadc for NXP frdm_mcxn236

Signed-off-by: Neil Chen <cheng.chen_1@nxp.com>
---
 boards/nxp/frdm_mcxn236/board.c                   |  5 +++++
 boards/nxp/frdm_mcxn236/doc/index.rst             |  2 ++
 boards/nxp/frdm_mcxn236/frdm_mcxn236-pinctrl.dtsi | 10 ++++++++++
 boards/nxp/frdm_mcxn236/frdm_mcxn236.dts          |  4 ++++
 boards/nxp/frdm_mcxn236/frdm_mcxn236.dtsi         |  5 +++++
 boards/nxp/frdm_mcxn236/frdm_mcxn236.yaml         |  1 +
 6 files changed, 27 insertions(+)

diff --git a/boards/nxp/frdm_mcxn236/board.c b/boards/nxp/frdm_mcxn236/board.c
index 88b01760a50..a8bf784f561 100644
--- a/boards/nxp/frdm_mcxn236/board.c
+++ b/boards/nxp/frdm_mcxn236/board.c
@@ -175,6 +175,11 @@ static int frdm_mcxn236_init(void)
 	SPC_EnableActiveModeAnalogModules(SPC0, kSPC_controlVref);
 #endif
 
+#if DT_NODE_HAS_STATUS_OKAY(DT_NODELABEL(lpadc0))
+	CLOCK_SetClkDiv(kCLOCK_DivAdc0Clk, 1U);
+	CLOCK_AttachClk(kFRO_HF_to_ADC0);
+#endif
+
 	/* Set SystemCoreClock variable. */
 	SystemCoreClock = CLOCK_INIT_CORE_CLOCK;
 
diff --git a/boards/nxp/frdm_mcxn236/doc/index.rst b/boards/nxp/frdm_mcxn236/doc/index.rst
index 766a2d9ec42..864b7d04584 100644
--- a/boards/nxp/frdm_mcxn236/doc/index.rst
+++ b/boards/nxp/frdm_mcxn236/doc/index.rst
@@ -70,6 +70,8 @@ The FRDM-MCXN236 board configuration supports the following hardware features:
 +-----------+------------+-------------------------------------+
 | VREF      | on-chip    | regulator                           |
 +-----------+------------+-------------------------------------+
+| ADC       | on-chip    | adc                                 |
++-----------+------------+-------------------------------------+
 
 Targets available
 ==================
diff --git a/boards/nxp/frdm_mcxn236/frdm_mcxn236-pinctrl.dtsi b/boards/nxp/frdm_mcxn236/frdm_mcxn236-pinctrl.dtsi
index 7e587aad528..bc2b1084910 100644
--- a/boards/nxp/frdm_mcxn236/frdm_mcxn236-pinctrl.dtsi
+++ b/boards/nxp/frdm_mcxn236/frdm_mcxn236-pinctrl.dtsi
@@ -90,4 +90,14 @@
 		};
 	};
 
+
+	pinmux_lpadc0: pinmux_lpadc0 {
+		group0 {
+			pinmux = <ADC0_A2_PIO4_23>,
+				<ADC0_A1_PIO4_15>,
+				<ADC0_B1_PIO4_19>;
+			slew-rate = "fast";
+			drive-strength = "low";
+		};
+	};
 };
diff --git a/boards/nxp/frdm_mcxn236/frdm_mcxn236.dts b/boards/nxp/frdm_mcxn236/frdm_mcxn236.dts
index 3f14683e8f2..e1b3397acf9 100644
--- a/boards/nxp/frdm_mcxn236/frdm_mcxn236.dts
+++ b/boards/nxp/frdm_mcxn236/frdm_mcxn236.dts
@@ -117,3 +117,7 @@
 &vref {
 	status = "okay";
 };
+
+&lpadc0 {
+	status = "okay";
+};
diff --git a/boards/nxp/frdm_mcxn236/frdm_mcxn236.dtsi b/boards/nxp/frdm_mcxn236/frdm_mcxn236.dtsi
index b4631c79afa..9464d7b26a9 100644
--- a/boards/nxp/frdm_mcxn236/frdm_mcxn236.dtsi
+++ b/boards/nxp/frdm_mcxn236/frdm_mcxn236.dtsi
@@ -118,3 +118,8 @@
 	pinctrl-0 = <&pinmux_flexpwm1_pwm0>;
 	pinctrl-names = "default";
 };
+
+&lpadc0 {
+	pinctrl-0 = <&pinmux_lpadc0>;
+	pinctrl-names = "default";
+};
diff --git a/boards/nxp/frdm_mcxn236/frdm_mcxn236.yaml b/boards/nxp/frdm_mcxn236/frdm_mcxn236.yaml
index b1c8f18a591..d01d9a447b5 100644
--- a/boards/nxp/frdm_mcxn236/frdm_mcxn236.yaml
+++ b/boards/nxp/frdm_mcxn236/frdm_mcxn236.yaml
@@ -23,4 +23,5 @@ supported:
   - pwm
   - counter
   - regulator
+  - adc
 vendor: nxp