Hi Robert, On Wed, Mar 18, 2015 at 7:34 PM, Robert Baldyga <r.baldyga@xxxxxxxxxxx> wrote: > > This patch introduces OTG support in DWC3 driver. OTG feature is responsible > for dynamic USB role switching (between host and peripheral modes) based > on detected cable type. > > Each role switch causes complete core reinitialization. In peripheral Do you really want to do complete core reinitialization? While switching to HOST mode you might need to issue a LHRESET and while switching to Device mode make sure you re-initiallize the event buffer addresses. If LHRESET is not used then you should do what you have done. But I don't think adding and removing the platform_device for XHCI is the way to go. This might impact SoC's which really implement the OTG for DWC3. I made an attempt on the same and could'nt work on it more. This still has some issues, but could be fixed. https://lkml.org/lkml/2014/11/25/600 > mode UDC device is activated using VBUS session control mechanism. In > host mode the new XHCI device is registered to make bus visible in system. > > This code is inspired by DWC3 driver from Hardkernel Linux sources [1]. > > [1] https://github.com/hardkernel/linux. > > Signed-off-by: Robert Baldyga <r.baldyga@xxxxxxxxxxx> Regards -George -- 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
