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

Support dac for NXP frdm_mcxa156 board.

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

Author: NeilChen93

boards/nxp/frdm_mcxa156/board.c

@@ -116,6 +116,14 @@ static int frdm_mcxa156_init(void)
 	CLOCK_AttachClk(kFRO12M_to_LPUART0);
 #endif
 
+#if DT_NODE_HAS_STATUS_OKAY(DT_NODELABEL(dac0))
+	SPC_EnableActiveModeAnalogModules(SPC0, kSPC_controlDac0);
+	CLOCK_SetClockDiv(kCLOCK_DivDAC0, 1u);
+	CLOCK_AttachClk(kFRO12M_to_DAC0);
+
+	CLOCK_EnableClock(kCLOCK_GateDAC0);
+#endif
+
 	/* Set SystemCoreClock variable. */
 	SystemCoreClock = CLOCK_INIT_CORE_CLOCK;
 

boards/nxp/frdm_mcxa156/doc/index.rst

@@ -54,6 +54,8 @@ The FRDM-MCXA156 board configuration supports the following hardware features:
 +-----------+------------+-------------------------------------+
 | FLASH     | on-chip    | soc flash                           |
 +-----------+------------+-------------------------------------+
+| DAC       | on-chip    | dac                                 |
++-----------+------------+-------------------------------------+
 
 Targets available
 ==================

boards/nxp/frdm_mcxa156/frdm_mcxa156-pinctrl.dtsi

@@ -16,5 +16,11 @@
 			input-enable;
 		};
 	};
-
+	pinmux_dac0: pinmux_dac0 {
+		group0 {
+			pinmux = <DAC0_OUT_P2_2>;
+			drive-strength = "low";
+			slew-rate = "fast";
+		};
+	};
 };

boards/nxp/frdm_mcxa156/frdm_mcxa156.dts

@@ -88,3 +88,9 @@
 	pinctrl-0 = <&pinmux_lpuart0>;
 	pinctrl-names = "default";
 };
+
+&dac0 {
+	status = "okay";
+	pinctrl-0 = <&pinmux_dac0>;
+	pinctrl-names = "default";
+};

boards/nxp/frdm_mcxa156/frdm_mcxa156.yaml

@@ -16,4 +16,5 @@ toolchain:
   - xtools
 supported:
   - gpio
+  - dac
 vendor: nxp