• Anton Vorontsov's avatar
    powerpc/85xx: Fix P1020RDB boot hang due USB2 · 0aedc008
    Anton Vorontsov authored
    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: default avatarAnton Vorontsov <avorontsov@mvista.com>
    Signed-off-by: default avatarKumar Gala <galak@kernel.crashing.org>
    0aedc008
p1020rdb.dts 13.2 KB