rt-thread/components/drivers/can/Kconfig

config RT_USING_CAN
    bool "Using CAN device drivers"
    default n

if RT_USING_CAN
    config RT_CAN_USING_HDR
        bool "Enable CAN hardware filter"
        default n
    config RT_CAN_USING_CANFD
        bool "Enable CANFD support"
        default n
endif