device_find_child — device iterator for locating a particular device.
struct device * device_find_child
(struct device * parent, void * data, int (*match)
(struct device *dev, void *data));
parent struct device
Data to pass to match function
Callback function to check device
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.