boards: nxp/frdm_mcxn947: Support LPCMP for NXP frdm_mcxn947 board

Support LPCMP for NXP frdm_mcxn947 board

Signed-off-by: Zhaoxiang Jin <[email protected]>

Author: ZhaoxiangJin

boards/nxp/frdm_mcxn947/board.c

@@ -268,6 +268,12 @@ static int frdm_mcxn947_init(void)
 	USB_EhciPhyInit(kUSB_ControllerEhci0, BOARD_XTAL0_CLK_HZ, &usbPhyConfig);
 #endif
 
+#if DT_NODE_HAS_STATUS(DT_NODELABEL(lpcmp0), okay)
+	CLOCK_SetClkDiv(kCLOCK_DivCmp0FClk, 1U);
+	CLOCK_AttachClk(kFRO12M_to_CMP0F);
+	SPC_EnableActiveModeAnalogModules(SPC0, (kSPC_controlCmp0 | kSPC_controlCmp0Dac));
+#endif
+
 	/* Set SystemCoreClock variable. */
 	SystemCoreClock = CLOCK_INIT_CORE_CLOCK;
 

boards/nxp/frdm_mcxn947/doc/index.rst

@@ -90,6 +90,8 @@ The FRDM-MCXN947 board configuration supports the following hardware features:
 +-----------+------------+-------------------------------------+
 | USBHS     | on-chip    | USB device                          |
 +-----------+------------+-------------------------------------+
+| LPCMP     | on-chip    | sensor(comparator)                  |
++-----------+------------+-------------------------------------+
 
 Targets available
 ==================

boards/nxp/frdm_mcxn947/frdm_mcxn947-pinctrl.dtsi

@@ -157,4 +157,13 @@
 			drive-strength = "low";
 		};
 	};
+
+	pinmux_lpcmp0: pinmux_lpcmp0 {
+		group0 {
+			pinmux = <CMP0_IN0_PIO1_0>;
+			drive-strength = "low";
+			slew-rate = "fast";
+			bias-pull-up;
+		};
+	};
 };

boards/nxp/frdm_mcxn947/frdm_mcxn947.dtsi

@@ -191,3 +191,8 @@
 	pinctrl-0 = <&pinmux_lpadc0>;
 	pinctrl-names = "default";
 };
+
+&lpcmp0 {
+	pinctrl-0 = <&pinmux_lpcmp0>;
+	pinctrl-names = "default";
+};

boards/nxp/frdm_mcxn947/frdm_mcxn947_mcxn947_cpu0.dts

@@ -165,3 +165,7 @@
 zephyr_udc0: &usb1 {
 	status = "okay";
 };
+
+&lpcmp0 {
+	status = "okay";
+};