drivers: can: Add Kconfig option for CANFD datalenght

Add Kconfig option to select appropriate can data field length

Signed-off-by: Alexander Wachter <[email protected]>

Author: alexanderwachter

drivers/can/Kconfig

@@ -29,6 +29,16 @@ config CAN_FD_MODE
 	help
 	  Enable CAN-FD compatible API
 
+if CAN_FD_MODE
+
+config CAN_MAX_DLEN
+	int "Max data lenght in CAN frames"
+	range 8 64
+	default 64
+	help
+	  Size of the data field in the zcan_frame
+endif # CAN_FD_MODE
+
 config CAN_INIT_PRIORITY
 	int "CAN driver init priority"
 	default 80

include/drivers/can.h

@@ -33,7 +33,11 @@ extern "C" {
 #define CAN_STD_ID_MASK CAN_MAX_STD_ID
 #define CAN_EXT_ID_MASK (0x1FFFFFFF)
 #define CAN_MAX_DLC    (8)
+#ifndef CONFIG_CAN_MAX_DLEN
 #define CAN_MAX_DLEN    8
+#else
+#define CAN_MAX_DLEN    CONFIG_CAN_MAX_DLEN
+#endif
 
 /* CAN_TX_* are the error flags from tx_callback and send.*/
 /** send successfully */