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.