soc: arm: nxp: lpc55xxx: add MCAN support

Add support for the NXP LPC MCAN CAN-FD controller.

Signed-off-by: Henrik Brix Andersen <[email protected]>

Author: henrikbrixandersen

soc/arm/nxp_lpc/lpc55xxx/Kconfig.defconfig.lpc55S16

@@ -24,4 +24,8 @@ config SOC_FLASH_MCUX
 	default y
 	depends on FLASH
 
+config CAN_MCUX_MCAN
+	default y
+	depends on CAN
+
 endif # SOC_LPC55S16

soc/arm/nxp_lpc/lpc55xxx/Kconfig.soc

@@ -17,6 +17,7 @@ config SOC_LPC55S16
 	select ARM_TRUSTZONE_M
 	select CLOCK_CONTROL
 	select HAS_MCUX_IAP if !TRUSTED_EXECUTION_NONSECURE
+	select HAS_MCUX_MCAN
 
 config SOC_LPC55S28
 	bool "SOC_LPC55S28 M33"

soc/arm/nxp_lpc/lpc55xxx/soc.c

@@ -175,6 +175,12 @@ DT_FOREACH_STATUS_OKAY(nxp_lpc_ctimer, CTIMER_CLOCK_SETUP)
 	CLOCK_AttachClk(kPLL0_DIV_to_FLEXCOMM7);
 #endif
 
+#if DT_NODE_HAS_COMPAT_STATUS(DT_NODELABEL(can0), nxp_lpc_mcan, okay)
+	CLOCK_SetClkDiv(kCLOCK_DivCanClk, 1U, false);
+	CLOCK_AttachClk(kMCAN_DIV_to_MCAN);
+	RESET_PeripheralReset(kMCAN_RST_SHIFT_RSTn);
+#endif
+
 #endif /* CONFIG_SOC_LPC55S69_CPU0 */
 }