snd_register_device(9) [centos man page]

SND_REGISTER_DEVICE(9)					      Miscellaneous Functions					    SND_REGISTER_DEVICE(9)

NAME

       snd_register_device - Register the ALSA device file for the card

SYNOPSIS

       int snd_register_device(int type, struct snd_card * card, int dev, const struct file_operations * f_ops, void * private_data,
			       const char * name);

ARGUMENTS

       type
	   the device type, SNDRV_DEVICE_TYPE_XXX

       card
	   the card instance

       dev
	   the device index

       f_ops
	   the file operations

       private_data
	   user pointer for f_ops->open

       name
	   the device file name

DESCRIPTION

       Registers an ALSA device file for the given card. The operators have to be set in reg parameter.

       This function uses the card's device pointer to link to the correct struct device.

RETURN

       Zero if successful, or a negative error code on failure.

COPYRIGHT

Kernel Hackers Manual 3.10					     June 2014						    SND_REGISTER_DEVICE(9)

DEVICE_CREATE(9)					   Device drivers infrastructure					  DEVICE_CREATE(9)

NAME

       device_create - creates a device and registers it with sysfs

SYNOPSIS

       struct device * device_create(struct class * class, struct device * parent, dev_t devt, void * drvdata, const char * fmt, ...);

ARGUMENTS

       class
	   pointer to the struct class that this device should be registered to

       parent
	   pointer to the parent struct device of this new device, if any

       devt
	   the dev_t for the char device to be added

       drvdata
	   the data to be added to the device for callbacks

       fmt
	   string for the device's name

       ...
	   variable arguments

DESCRIPTION

       This function can be used by char device classes. A struct device will be created in sysfs, registered to the specified class.

       A "dev" file will be created, showing the dev_t for the device, if the dev_t is not 0,0. If a pointer to a parent struct device is passed
       in, the newly created struct device will be a child of that device in sysfs. The pointer to the struct device will be returned from the
       call. Any further sysfs files that might be required can be created using this pointer.

       Returns struct device pointer on success, or ERR_PTR on error.

NOTE

       the struct class passed to this function must have previously been created with a call to class_create.

COPYRIGHT

Kernel Hackers Manual 3.10					     June 2014							  DEVICE_CREATE(9)