Hi Sven, Marek, Jean-Jacques, > On 5/6/19 12:12 PM, Sven Schwermer wrote: > > Hi, > > > > I’m running into linking issues when enabling CONFIG_DM_USB_GADGET > > with CONFIG_CI_UDC because dm_usb_gadget_handle_interrupts is not > > available. That made me look into what’s required to port ci_udc to > > driver model. I have a few conceptual questions about this: > > > > 1. Some other USB gadget drivers (dwc3-generic, ti-musb) seem to > > create a wrapper driver that binds either the gadget or the > > host-mode driver to the USB device, depending on the configured > > mode. Is this the desired approach?
I think that we shall follow the already in-tree pattern. Jean-Jacques Hiblot (CC'ed) did a great job on porting / developing this code (moreover there is a u-boot command - bind/unbind which allows binding usb devices) > > > > 2. I’m working with a i.MX6 (7) device so the host-mode driver is > > ehci-mx6, but I’ve seen that ci_udc is also used with other > > host-mode drivers. How would a wrapper work in this case where > > there are multiple possible host-mode drivers but one gadget driver? > > As fair as I understood the "bind/unbind" command would allow you to do it [1]. Jean-Jacques am I right here ? > > 3. Any tips and hints are welcome :) I can offer myself as a tester for imx6q (as I do have a few of them queued for the DM/DTS conversion). > > +CC Lukasz, UDC is his stuff. > Note: [1] - https://lists.denx.de/pipermail/u-boot/2018-June/333105.html Best regards, Lukasz Majewski -- DENX Software Engineering GmbH, Managing Director: Wolfgang Denk HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: (+49)-8142-66989-59 Fax: (+49)-8142-66989-80 Email: lu...@denx.de
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