usb: gadget: udc: adapt to OTG core
The OTG state machine needs a mechanism to start and
stop the gadget controller. Add usb_gadget_start()
and usb_gadget_stop().
Introduce usb_otg_add_gadget_udc() to allow controller drivers
to register a gadget controller that is part of an OTG instance.
Register with OTG core when gadget function driver
is available and unregister when function driver is unbound.
We need to unlock the usb_lock mutex before calling
usb_otg_register_gadget() in udc_bind_to_driver() and
usb_gadget_remove_driver() else it will cause a circular
locking dependency.
Ignore softconnect sysfs control when we're in OTG
mode as OTG FSM takes care of gadget softconnect using
the b_bus_req mechanism.
Signed-off-by: Roger Quadros <rogerq@ti.com>
2 files changed
