[PATCH v3 0/3] usb: dwc3: dual-role support

[Roger Quadros <rogerq@ti.com>]

Hi,

Taking a simplistic approach this time. We don't use the OTG controller
block at all. Instead we just rely on ID events via extcon framework.

I tried to get rid of workqueue but unfortunately it causes too much pain
when the UDC is unregistered.

https://hastebin.com/upugaqogol.xml
https://hastebin.com/yayaduqodo.xml

So I've still kept the workqueue around.

We also have debugfs role switching, but I don't yet see how we
can use this for real testing as I still need to manually plug/unplug
the USB cables (host vs device) to test switching :).

v3:
- restructure and simplify. Remove OTG controller code, only rely on extcon.

cheers,
-roger

Roger Quadros (3):
  usb: udc: allow adding and removing the same gadget device
  usb: dwc3: make role-switching work with debugfs/mode
  usb: dwc3: Add dual-role support

 drivers/usb/dwc3/Makefile     |   4 +
 drivers/usb/dwc3/core.c       |  18 ++---
 drivers/usb/dwc3/core.h       |  22 ++++++
 drivers/usb/dwc3/debugfs.c    |  49 +++++++++++--
 drivers/usb/dwc3/drd.c        | 167 ++++++++++++++++++++++++++++++++++++++++++
 drivers/usb/gadget/udc/core.c |   1 +
 6 files changed, 242 insertions(+), 19 deletions(-)
 create mode 100644 drivers/usb/dwc3/drd.c

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2.7.4