boards: twr_ke18f: enable CAN controller

Enable CAN bus controller on the NXP TWR-KE18F development board.

Signed-off-by: Henrik Brix Andersen <hebad@vestas.com>

boards/arm/twr_ke18f/Kconfig.defconfig

@@ -37,6 +37,13 @@ config SPI_1
 
 endif # SPI_MCUX_LPSPI
 
+if CAN
+
+config CAN_0
+	default y
+
+endif # CAN
+
 if PINMUX_MCUX
 
 config PINMUX_MCUX_PORTA

boards/arm/twr_ke18f/doc/index.rst

@@ -78,6 +78,8 @@ features:
 +-----------+------------+-------------------------------------+
 | ADC       | on-chip    | adc                                 |
 +-----------+------------+-------------------------------------+
+| CAN       | on-chip    | can                                 |
++-----------+------------+-------------------------------------+
 
 The default configuration can be found in the defconfig file:
 ``boards/arm/twr_ke18f/twr_ke18f_defconfig``.

boards/arm/twr_ke18f/pinmux.c

@@ -102,6 +102,12 @@ static int twr_ke18f_pinmux_init(struct device *dev)
 	pinmux_pin_set(portd, 8, PORT_PCR_MUX(kPORT_MuxAlt2));
 #endif
 
+#if CONFIG_CAN_0
+	/* FlexCAN0 RX, TX */
+	pinmux_pin_set(porte, 4, PORT_PCR_MUX(kPORT_MuxAlt5));
+	pinmux_pin_set(porte, 5, PORT_PCR_MUX(kPORT_MuxAlt5));
+#endif
+
 	/* FXOS8700 INT1, INT2, RST */
 #ifdef DT_INST_0_NXP_FXOS8700_INT1_GPIOS_PIN
 	pinmux_pin_set(porta, 14, PORT_PCR_MUX(kPORT_MuxAsGpio));

boards/arm/twr_ke18f/twr_ke18f.dts

@@ -146,6 +146,11 @@
 	sample-time = <12>;
 };
 
+&can0 {
+	status = "ok";
+	bus-speed = <125000>;
+};
+
 &flash0 {
 	/*
 	 * For more information, see:

boards/arm/twr_ke18f/twr_ke18f.yaml

@@ -15,3 +15,4 @@ supported:
   - hwinfo
   - spi
   - adc
+  - can