int bttv_sub_add_device(struct bttv_core *core, char *name);
int bttv_sub_del_devices(struct bttv_core *core);
void bttv_gpio_irq(struct bttv_core *core);
int bttv_sub_add_device(struct bttv_core *core, char *name);
int bttv_sub_del_devices(struct bttv_core *core);
void bttv_gpio_irq(struct bttv_core *core);