On Wed, Jul 15, 2015 at 04:30:27PM +0300, Roger Quadros wrote: > On 14/07/15 03:34, Peter Chen wrote: > > On Mon, Jul 13, 2015 at 01:13:54PM +0300, Roger Quadros wrote: > >> Peter, > >> > >> On 13/07/15 04:58, Peter Chen wrote: > >>> On Wed, Jul 08, 2015 at 01:19:30PM +0300, Roger Quadros wrote: > >>>> This is to prevent missing symbol build error if OTG is > >>>> enabled (built-in) and HCD core (CONFIG_USB) is module. > >>>> > >>> > >>> We may let the OTG-DRD/OTG-FSM depends on CONFIG_USB to fix it. > >> > >> CONFIG_OTG already depends on CONFIG_USB as it is a sub-option of > >> CONFIG_USB. It doesn't depend on CONFIG_USB_GADGET and that can > >> be fixed. > >> > >> But dependency is not the problem here. Symbols not available to > >> OTG driver when USB/GADGET is 'm' is the problem. > >> > >> e.g. > >> CONFIG_USB_OTG is always built-in. > >> we need to work if CONFIG_USB is 'm'/'y' > >> _and_ if CONFIG_USB_GADGET is 'm'/'y' > >> > > > > below should fix this issue, but we may need to make some > > changes for code which are defined by CONFIG_USB_OTG. > > > > diff --git a/drivers/usb/core/Kconfig b/drivers/usb/core/Kconfig > > index a99c89e..5e374ad 100644 > > --- a/drivers/usb/core/Kconfig > > +++ b/drivers/usb/core/Kconfig > > @@ -42,8 +42,9 @@ config USB_DYNAMIC_MINORS > > If you are unsure about this, say N here. > > > > config USB_OTG > > - bool "OTG support" > > + tristate "OTG support" > > depends on PM > > + depends on USB && USB_GADGET > > default n > > help > > The most notable feature of > > USB OTG is support for a > > With this USB_OTG will become 'm' when either USB or USB_GADGET is m > and will break if either USB or USB_GADGET is made y as all OTG core > API symbols won't be available. :) > Ok, after thinking more, seems we can't handle properly if USB_OTG as 'm', your idea that using host/gadget/fsm->ops to call hcd/gadget API and the controller driver will defines these ops (due to it will use hcd/gadget function) is proper way currently. -- Best Regards, Peter Chen -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
