Robert Jarzmik <robert.jarzmik@xxxxxxx> writes:
> Dmitry Eremin-Solenikov <dbaryshkov@xxxxxxxxx> writes:
>
>> This reverts commit 2111667b4677 ("ARM: pxa: call debug_ll_io_init for
>> earlyprintk")
>>
>> This commit gives the following backtrace on PXA/tosa early in the boot
>> time when DEBUG_LL is enabled. It is due to overlap between uart memory
>> and PERIPH_ memory block mapped by pxa_map_io.
>
> Indeed, all available UARTs IO mappings are already covered by pxa_map_io(), so
> the revert will remove the bug and keep the DEBUG_LL functionality. I suppose
> you did the test with the revert and the lowlevel debugging works, right ?
Actually, I have a question for Andrew : was your commit aimed at the 3 or 4
available UARTs (ie. in peripheral address space), or is it a case where an
external UART is mapped on the system bus (if that is possible) ?
--
Robert
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