• Robert Jarzmik's avatar
    ARM: pxa: fix DFI bus lockups on startup · adf3442c
    Robert Jarzmik authored
    After the conversion of pxa architecture to common clock framework, the
    NAND clock can be disabled on startup if no nand driver claims it.
    
    In this case, it happens that if the bootloader used the NAND and set
    the DFI arbitration bit, the next access to a static memory controller
    area, such as an ethernet card, the system bus will stall, and the core
    will be stalled forever.
    
    Fix this by clearing the DFI arbritration bit in pxa3xx startup. The bit
    will be enabled the pxa3xx-nand driver on need anyway. The only left
    requirement is that upon pxa3xx-nand removal, the bit should be cleared
    before the clock is disabled.
    Signed-off-by: default avatarRobert Jarzmik <robert.jarzmik@free.fr>
    adf3442c
pxa3xx.c 9.96 KB