[U-Boot] [RFC PATCH 0/7] RFC: dm: Add USB support

Simon Glass
2015-01-30T22:41:33Z

Hi Marek,

On 30 January 2015 at 15:16, Marek Vasut <marex@denx.de> wrote:
>
> On Friday, January 30, 2015 at 08:04:50 PM, Simon Glass wrote:
> > This series adds basic driver model support to USB. The intent is to permit
> > the various subsystems (OHCI, EHCI, XHCI) to co-exist and allow any number
> > of USB ports of different types. So far the absolute limit on the number
> > of USB devices is only slightly relaxed.
> >
> > Only USB controllers have a real driver model device. USB devices
> > (including the hub in the controller) are not modelled as driver model
> > devices. This is for two reasons:
> >
> > - it is easier since we don't need to bind a whole lot of devices when
> > scanning
> > - the two main USB devices (block devices and Ethernet) don't have driver
> > mode support yet anyway, so it would be pointless. However the recent
> > network RFC has encouraged me to send this.
> >
> > The basic approach is to set up the driver model structures in parallel to
> > what already exists rather than to replace them. This allows both driver
> > model and legacy to be used for USB, although not with the same board.
> >
> > So far only XHCI is supported. As an example the Exynos XHCI driver is
> > converted to driver model.
> >
> > I would appreciate comments before going further.
> >
> > Caveats:
> > - sandbox code is incomplete and there are no tests
> > - 'usb stop' does not remove existing devices (I have not yet settled on
> > the best approach)
> > - the usb.h changes need to be split correctly into the patches once they
> > are final
> >
> > This series is available at u-boot-dm/usb-working.
>
> Hi!
>
> I'll look at this by the end of next week, I will be free by then. It's not
> possible for me to do it earlier, sorry. Does this still work for you please?
>

Definitely, that sounds good. I was planning to leave it a week or two
anyway, although I might fiddle more with the sandbox side in the
meantime.

Regards,
Simon