usb_composite_probe — register a composite driver
int usb_composite_probe ( | struct usb_composite_driver * driver, |
int (*bind)
(struct usb_composite_dev *cdev)); |
driverthe driver to register
bind
the callback used to allocate resources that are shared across the
whole device, such as string IDs, and add its configurations using
usb_add_config(). This may fail by returning a negative errno
value; it should return zero on successful initialization.
This function is used to register drivers using the composite driver
framework. The return value is zero, or a negative errno value.
Those values normally come from the driver's bind method, which does
all the work of setting up the driver to match the hardware.
On successful return, the gadget is ready to respond to requests from
the host, unless one of its components invokes usb_gadget_disconnect
while it was binding. That would usually be done in order to wait for
some userspace participation.