void pcccan_write_register(unsigned data, unsigned long address);
unsigned pcccan_read_register(unsigned long address);
int pcccan_program_irq(struct candevice_t *candev);
void pcccan_write_register(unsigned data, unsigned long address);
unsigned pcccan_read_register(unsigned long address);
int pcccan_program_irq(struct candevice_t *candev);