[U-Boot] [PATCH] usb: imx: Allow multiple USB ports to be used at the same time on mx5

[Matthew Starr]

Simon,

> On 21 May 2015 at 15:02, Matthew Starr <mstarr at hedonline.com> wrote:
> >
> > CONFIG_MXC_USB_PORT was used to define which USB port was to be
> > initialized.  If CONFIG_USB_MAX_CONTROLLER_COUNT > 1, then the port
> > specified by CONFIG_MXC_USB_PORT would be duplicated
> > CONFIG_USB_MAX_CONTROLLER_COUNT times including duplicating all
> > devices connected to the ports.  None of the other USB ports would be
> > available for use.
> >
> > The fix is to remove all instances of CONFIG_MXC_USB_PORT from the
> > imx53 ehci driver since it was only allowing the port specified by
> > CONFIG_MXC_USB_PORT to be populated.  Then use
> > CONFIG_USB_MAX_CONTROLLER_COUNT to specifiy which USB ports
> should be
> > enabled, starting with port 0.  If port 1 is needed, then set
> > CONFIG_USB_MAX_CONTROLLER_COUNT to 2 so 2 ports get populated
> (port 0
> > and port 1) even though port 0 will not be used.
> >
> > Configurations for all boards affected are updated.
> >
> > Signed-off-by: Matthew Starr <mstarr at hedonline.com>
> >
> > ---
> >
> >  drivers/usb/host/ehci-mx5.c    | 8 ++++----
> >  include/configs/m53evk.h       | 2 +-
> >  include/configs/mx51_efikamx.h | 1 +
> >  include/configs/mx51evk.h      | 2 +-
> >  include/configs/mx53loco.h     | 2 +-
> >  include/configs/usbarmory.h    | 2 +-
> >  6 files changed, 9 insertions(+), 8 deletions(-)
> 
> Perhaps instead this should move to driver model - it supports EHCI.
> See tegra, exynos, sunxi and sandbox.

Wouldn't that require imx53 support for device trees?  Currently I don't believe that is implemented yet.

Regards,
Matthew