[U-Boot] [PATCH v5 1/1] tegra: usb: Fix device enumeration problem of USB1

Marek Vasut marek.vasut at gmail.com
Tue Jun 26 03:05:42 CEST 2012


Dear Tom Warren,

> Marek,
> 
> > -----Original Message-----
> > From: Marek Vasut [mailto:marek.vasut at gmail.com]
> > Sent: Monday, June 25, 2012 4:48 PM
> > To: Stephen Warren
> > Cc: Jim Lin; 'u-boot at lists.denx.de'; Tom Warren
> > Subject: Re: [PATCH v5 1/1] tegra: usb: Fix device enumeration problem of
> > USB1
> > 
> > Dear Stephen Warren,
> > 
> > > On 06/25/2012 12:40 AM, Jim Lin wrote:
> > > > A known hardware issue of USB1 port where bit 1 (connect status
> > > > change) of PORTSC register will be set after issuing Port Reset
> > > > (like "usb reset" in u-boot command line).
> > > > This will be treated as an error and stops later device enumeration.
> > > > 
> > > > Therefore we clear that bit after Port Reset in order to proceed
> > > > later device enumeration.
> > > > 
> > > > Signed-off-by: Jim Lin <jilin at nvidia.com>
> > > 
> > > Acked-by: Stephen Warren <swarren at wwwdotorg.org>
> > 
> > Ok, it's icky nvidia stuff :-)
> > 
> > Will you apply it? I'm good with the current shape.
> 
> This will be applied to u-boot-tegra/next as soon as I'm done validating
> Allen's SPL changes.

Good, I'm sure I'm leaving it in good hands :)

Thanks Tom!

> Tom
> 
> > Best regards,
> > Marek Vasut

Best regards,
Marek Vasut


More information about the U-Boot mailing list