bttv_gpio_enable
retval = bttv_gpio_enable(bt->bttv_nr,
EXPORT_SYMBOL(bttv_gpio_enable);
extern int bttv_gpio_enable(unsigned int card,
bttv_gpio_enable(card->bttv_nr, 1, 1); /* output */
int ret = bttv_gpio_enable(bt->bttv_nr, 0x001F, 0x001F);
int ret = bttv_gpio_enable(bt->bttv_nr, 0x08, 0x08);