[U-Boot] Question about DWC3 USB controller driver

[Marek Vasut]

On Tuesday, July 28, 2015 at 05:48:49 PM, Masahiro Yamada wrote:
> Hi Marek,

Hi!

> 2015-07-28 2:03 GMT+09:00 Marek Vasut <marex at denx.de>:
> > On Monday, July 27, 2015 at 05:37:52 PM, Masahiro Yamada wrote:
> >> Hi Marek, other USB guys,
> > 
> > Hi!
> > 
> >> I noticed commit dc9cdf859e11de (usb: dwc3: Add DWC3 controller driver
> >> support) was pulled into the mainline a few days ago.
> >> 
> >> 
> >> Now we have two drivers with similar names.
> >> 
> >> 
> >> - drivers/usb/dwc3/
> >> - drivers/usb/host/xhci-dwc3.c
> >> 
> >> 
> >> Are they the same hardware, or completely different ones?
> > 
> > dwc3 is the USB gadget, drivers/usb/host/xhci-dwc3 is the USB host.
> > I believe the host part should be merged into drivers/usb/xhci-dwc3
> > eventually.
> 
> In my understanding, Synopsys' DWC3 is dual role core.
> 
> 
> In Linux, both host and gadget are supported,
> but drivers/usb/dwc3/host.c is missing from U-Boot.
> 
> I think merging into a single directory drivers/usb/dwc3
> is the right thing.

Correct. Someone would have to backport the host part of drivers/usb/dwc3
from mainline for that purpose though .

Best regards,
Marek Vasut