As discussed in the thread "Driver for something that's neither a
device nor an interface driver?", here's a patchset that makes it
possible for device drivers to extend the generic device driver.

An example usage is provided in the shape of a driver that allows
changing the charge type of an Apple MFi device to be fast.

Bastien Nocera (5):
  USB: Export generic USB device driver functions
  USB: Make it possible to "subclass" usb_device_driver
  USB: Implement usb_device_match_id()
  USB: Select better matching USB drivers when available
  USB: Add driver to control USB fast charge for iOS devices

 drivers/usb/core/driver.c               |  66 +++-
 drivers/usb/core/generic.c              |  49 ++-
 drivers/usb/core/usb.h                  |   4 +
 drivers/usb/misc/Kconfig                |  10 +
 drivers/usb/misc/Makefile               |   1 +
 drivers/usb/misc/apple-mfi-fastcharge.c | 500 ++++++++++++++++++++++++
 include/linux/usb.h                     |   5 +
 7 files changed, 619 insertions(+), 16 deletions(-)
 create mode 100644 drivers/usb/misc/apple-mfi-fastcharge.c


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