Register the device
int snd_device_register(struct snd_card * card, void * device_data);
card
the card instance
device_data
the data pointer to register
Registers the device which was already created via snd_device_new. Usually this is called from snd_card_register, but it can be called later if any new devices are created after invocation of snd_card_register.
Zero if successful, or a negative error code on failure or if the device not found.