[U-Boot] DM for ci_udc

[Marek Vasut]

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?
> 
> 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?
> 
> 3. Any tips and hints are welcome :)

+CC Lukasz, UDC is his stuff.

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Best regards,
Marek Vasut