void pcm3680_write_register(unsigned data, unsigned long address);
unsigned pcm3680_read_register(unsigned long address);
int pcm3680_program_irq(struct candevice_t *candev);
void pcm3680_write_register(unsigned data, unsigned long address);
unsigned pcm3680_read_register(unsigned long address);
int pcm3680_program_irq(struct candevice_t *candev);