int smartcan_init_hw_data(struct candevice_t *candev);
int smartcan_init_chip_data(struct candevice_t *candev, int chipnr);
int smartcan_init_obj_data(struct chip_t *chip, int objnr);
-void smartcan_write_register(unsigned char data, unsigned long address);
+void smartcan_write_register(unsigned data, unsigned long address);
unsigned smartcan_read_register(unsigned long address);