snd_card_register (9) - Linux Man Pages
snd_card_register: register the soundcard
snd_card_register - register the soundcard
int snd_card_register(struct snd_card
- soundcard structure
This function registers all the devices assigned to the soundcard. Until calling this, the ALSA control interface is blocked from the external accesses. Thus, you should call this function at the end of the initialization of the card.