DEVICE_CREATE(9) Device drivers infrastructure DEVICE_CREATE(9)NAME
device_create - creates a device and registers it with sysfs
struct device * device_create(struct class * class, struct device * parent, dev_t devt, void * drvdata, const char * fmt, ...);
pointer to the struct class that this device should be registered to
pointer to the parent struct device of this new device, if any
the dev_t for the char device to be added
the data to be added to the device for callbacks
string for the device's name
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.
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)
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DEVICE_SCHEDULE_CALL(9) Device drivers infrastructure DEVICE_SCHEDULE_CALL(9)NAME
device_schedule_callback_owner - helper to schedule a callback for a device
int device_schedule_callback_owner(struct device * dev, void (*func) (struct device *), struct module * owner);
callback function to invoke later.
module owning the callback routine
Attribute methods must not unregister themselves or their parent device (which would amount to the same thing). Attempts to do so will
deadlock, since unregistration is mutually exclusive with driver callbacks.
Instead methods can call this routine, which will attempt to allocate and schedule a workqueue request to call back func with dev as its
argument in the workqueue's process context. dev will be pinned until func returns.
This routine is usually called via the inline device_schedule_callback, which automatically sets owner to THIS_MODULE.
Returns 0 if the request was submitted, -ENOMEM if storage could not be allocated, -ENODEV if a reference to owner isn't available.
This routine won't work if CONFIG_SYSFS isn't set! It uses an underlying sysfs routine (since it is intended for use by attribute methods),
and if sysfs isn't available you'll get nothing but -ENOSYS.
COPYRIGHT Kernel Hackers Manual 3.10 June 2014 DEVICE_SCHEDULE_CALL(9)
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