DEVICE_CREATE_VARGS(9)            Device drivers infrastructure            DEVICE_CREATE_VARGS(9)



NAME
       device_create_vargs - creates a device and registers it with sysfs

SYNOPSIS
       struct device * device_create_vargs(struct class * class, struct device * parent,
                                           dev_t devt, void * drvdata, const char * fmt,
                                           va_list args);

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

       args
           va_list for the device's name

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 4.8.                 January 2017                    DEVICE_CREATE_VARGS(9)