snd_register_device_for_dev — Register the ALSA device file for the card
int snd_register_device_for_dev
(int type, struct snd_card * card, int dev, const struct file_operations * f_ops, void * private_data, const char * name, struct device * device);
the device type, SNDRV_DEVICE_TYPE_XXX
the card instance
the device index
the file operations
user pointer for f_ops->open
the device file name
the struct device to link this new device to
Registers an ALSA device file for the given card. The operators have to be set in reg parameter.
Returns zero if successful, or a negative error code on failure.