On 13/01/11 13:47, Daniel Schwierzeck wrote: > Hi John, > > 2011/1/13 John Crispin <blogic@xxxxxxxxxxx>: > >> >>>> + >>>> +/* all access to the ebu must be locked */ >>>> +DEFINE_SPINLOCK(ebu_lock); >>>> +EXPORT_SYMBOL_GPL(ebu_lock); >>>> >>>> >>> This lock is only needed if you want to use software arbitration. >>> Normally the EBU does hardware arbitration and can be accessed safely >>> without lock. >>> >>> >>> >> openwrt borks up on mini_fo init when this lock is not in-place. we saw >> a lot of issues in the past which lead to this lock being added. i will >> retry it with out the lock to verify >> >> > Ok I never tried mini_fo bit it's working fine with squashfs. Maybe > it's a problem with your EBU setup. We always reset > the EBU_ADDR_SEL0 and EBU_CON_0 registers in U-Boot's lowlevel_init.S. > The values are EBU_ADDR_SEL0 = 0x10000021 > and EBU_CON_0 = 0x8001F7FF. > My suggestion is to wrap the locking mechanism into separate inline > functions and define them only if really needed and enabled in kernel > config. > > Daniel > > > Ok, i will try with those values to see if the EBU is setup incorrectly, thx for the pointers !
