On Apr 22, 2010, at 10:44 AM, Anton Vorontsov wrote: > Since USB2 is shared with local bus, either local bus or USB2 > should be disabled. By default U-Boot enables local bus, so we > have to disable USB2, otherwise kernel hangs: > > ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver > fsl-ehci fsl-ehci.0: Freescale On-Chip EHCI Host Controller > fsl-ehci fsl-ehci.0: new USB bus registered, assigned bus number 1 > fsl-ehci fsl-ehci.0: irq 28, io base 0xffe22000 > fsl-ehci fsl-ehci.0: USB 2.0 started, EHCI 1.00 > hub 1-0:1.0: USB hub found > hub 1-0:1.0: 1 port detected > fsl-ehci fsl-ehci.1: Freescale On-Chip EHCI Host Controller > fsl-ehci fsl-ehci.1: new USB bus registered, assigned bus number 2 > <hangs here> > > Note that U-Boot doesn't clear 'status' property when it enables > USB2, so we have to comment out the whole node. > > To enable USB2, one can issue > 'setenv hwconfig usb2:dr_mode=<host|peripheral>' command at the > U-Boot prompt. > > Signed-off-by: Anton Vorontsov <avoront...@mvista.com> > --- > arch/powerpc/boot/dts/p1020rdb.dts | 6 ++++++ > 1 files changed, 6 insertions(+), 0 deletions(-)
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