[U-Boot] [patch 0/2] Some more USB-OHCI bugfixes

Stelian Pop stelian at popies.net
Fri Oct 10 10:25:51 CEST 2008


Le vendredi 10 octobre 2008 à 09:21 +0200, Remy Bohmer a écrit :
> Hello Stelian,
> 
> >> This clock is required, but is usually _not_ configured by U-boot (for
> >> the AT91SAM series) but by the bootstrap code. You could check if the
> >> current settings for PLLB matches the settings done by Linux.
> 
> > Bingo ! The bootstrap code does appear to setup some wrong values for
> > the PLLB multiplier/divisor. Once I set up the PLLB to use the same
> > values as Linux, USB starts to work ! Yay !
> 
> This is very good news, but it proves again that USB never worked
> before on these cores...
> Maybe more pieces are missing to get it completely working...

No, USB did work before on these cores, as the Atmel guys confirmed. I
guess some older versions of AT91Bootstrap had the proper PLLB
configuration settings which made USB work...

Stelian.
-- 
Stelian Pop <stelian at popies.net>



More information about the U-Boot mailing list