drivers: can: mcux: flexcan: fix loop back error when CAN FD enabled

Fix mcux flexcan driver failed to transfer when both loop back mode
and CAN FD mode are enabled.

Transceiver Delay Compensation feature must be disabled in loopback
mode. For some platforms, both FDCTRL[TDCEN] and ETDC[ETDCEN] can
enable such feature. In this case, SDK API only configure ETDC register
and current driver do not clear ETDC[ETDCEN].

Fix this issue by add ETDC[ETDCEN] configuration according to SDK
macro `FSL_FEATURE_FLEXCAN_HAS_ENHANCED_BIT_TIMING_REG` vaule.

Test this commit on mimxrt1180_evk/mimxrt1189/cm33 and set both CAN FD
mode and loop back mode.

Signed-off-by: William Tang <[email protected]>

Author: william-tang914

drivers/can/can_mcux_flexcan.c

@@ -482,9 +482,19 @@ static int mcux_flexcan_set_mode(const struct device *dev, can_mode_t mode)
 
 			/* Transceiver Delay Compensation must be disabled in loopback mode */
 			if ((mode & CAN_MODE_LOOPBACK) != 0) {
+#if (defined(FSL_FEATURE_FLEXCAN_HAS_ENHANCED_BIT_TIMING_REG) && \
+	 FSL_FEATURE_FLEXCAN_HAS_ENHANCED_BIT_TIMING_REG)
+				base->ETDC &= ~(CAN_ETDC_ETDCEN_MASK);
+#else
 				base->FDCTRL &= ~(CAN_FDCTRL_TDCEN_MASK);
+#endif
 			} else {
+#if (defined(FSL_FEATURE_FLEXCAN_HAS_ENHANCED_BIT_TIMING_REG) && \
+	 FSL_FEATURE_FLEXCAN_HAS_ENHANCED_BIT_TIMING_REG)
+				base->ETDC |= CAN_ETDC_ETDCEN_MASK;
+#else
 				base->FDCTRL |= CAN_FDCTRL_TDCEN_MASK;
+#endif
 			}
 		} else {
 			/* Disable CAN FD mode */