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device_find_child(9) [linux man page]

DEVICE_FIND_CHILD(9)					   Device drivers infrastructure				      DEVICE_FIND_CHILD(9)

NAME
device_find_child - device iterator for locating a particular device. SYNOPSIS
struct device * device_find_child(struct device * parent, void * data, int (*match) (struct device *dev, void *data)); ARGUMENTS
parent parent struct device data Data to pass to match function match Callback function to check device DESCRIPTION
This is similar to the device_for_each_child function above, but it returns a reference to a device that is 'found' for later use, as determined by the match callback. The callback should return 0 if the device doesn't match and non-zero if it does. If the callback returns non-zero and a reference to the current device can be obtained, this function will return to the caller and not iterate over any more devices. COPYRIGHT
Kernel Hackers Manual 2.6. July 2010 DEVICE_FIND_CHILD(9)

Check Out this Related Man Page

DEVICE_CREATE_WITH_G(9) 				   Device drivers infrastructure				   DEVICE_CREATE_WITH_G(9)

NAME
device_create_with_groups - creates a device and registers it with sysfs SYNOPSIS
struct device * device_create_with_groups(struct class * class, struct device * parent, dev_t devt, void * drvdata, const struct attribute_group ** groups, 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 groups NULL-terminated list of attribute groups to be created 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. Additional attributes specified in the groups parameter will also be created automatically. 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_WITH_G(9)
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