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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

March 2016 Kernel Hackers Manual 3.2.