boards: nxp: frdm_mcxn947: Enabled MRT

Enabled the MRT at the board level for
mcxn947. Enabled the clocking for the MRT
in the clock control.

Signed-off-by: Emilio Benavente <[email protected]>

Author: EmilioCBen

boards/nxp/frdm_mcxn947/doc/index.rst

@@ -101,6 +101,8 @@ The FRDM-MCXN947 board configuration supports the following hardware features:
 | DISPLAY   | on-chip    | flexio; MIPI-DBI. Tested with       |
 |           |            | :ref:`lcd_par_s035`                 |
 +-----------+------------+-------------------------------------+
+| MRT       | on-chip    | counter                             |
++-----------+------------+-------------------------------------+
 
 Targets available
 ==================

boards/nxp/frdm_mcxn947/frdm_mcxn947_mcxn947_cpu0.dtsi

@@ -192,3 +192,7 @@ zephyr_udc0: &usb1 {
 &flexio0 {
 	status = "okay";
 };
+
+&mrt0_channel0 {
+	status = "okay";
+};

drivers/clock_control/clock_control_mcux_syscon.c

@@ -25,7 +25,8 @@ static int mcux_lpc_syscon_clock_control_on(const struct device *dev,
 #endif /* defined(CONFIG_CAN_MCUX_MCAN) */
 #if defined(CONFIG_COUNTER_NXP_MRT)
 	if ((uint32_t)sub_system == MCUX_MRT_CLK) {
-#if defined(CONFIG_SOC_FAMILY_LPC) || defined(CONFIG_SOC_SERIES_RW6XX)
+#if defined(CONFIG_SOC_FAMILY_LPC) || defined(CONFIG_SOC_SERIES_RW6XX) ||\
+	defined(CONFIG_SOC_SERIES_MCXN)
 		CLOCK_EnableClock(kCLOCK_Mrt);
 #elif defined(CONFIG_SOC_FAMILY_NXP_IMXRT)
 		CLOCK_EnableClock(kCLOCK_Mrt0);