Re: [beagleboard] Re: TWL4030 intermittent freakout on boot

Koen Kooi
2008-05-10T15:16:47Z

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Op 10 mei 2008, om 16:57 heeft Woodruff, Richard het volgende
geschreven:
> Hi,
>
>> A grep of u-boot sources for the OMAP3 EVM does not yield any
>> occurrences of twl403 so you might be on to something with this
>> theory!
>
> Your SYS_BOOT line values make a difference in TWL behavior. The
> mask ROM knows specifics about this companion chip.
>
> One aspect people seem to miss is the fact that the mask ROM will
> touch T2 based on the boot order. The mask ROM also monkeys with
> some internal clocks and modules.
>
> So, just because your x-loader or u-boot doesn't touch a register
> that doesn't mean the mask ROM hasn't. So don't expect reset value.

Would it be an option to dump TWL regs with something like devmem2
after boot for the .22 WTBU kernels and linux-omap git ones? Or just
printk() them during early boot? It would be nice the have the correct
values, so the git twl driver can use those.

regards,

Koen
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