ARM errata 430973 on multi platform kernels (was: OMAP3-N900: Add microphone bias voltages)

[Robert Nelson]

>> And yes, for armhf userland one gets random oopses at least on the
>> Nokia N900. AFAIK this is not true for all ARMv7 processors
>> (especially non omaps), though.
>>
>> > http://www.spinics.net/lists/linux-omap/msg108511.html
>> >
>> > See also 5c86c5339c56 ("ARM: omap2plus_defconfig: Enable ARM erratum
>> > 430973 for omap3").
>>
>> For me the random oopses occur without this config flag and are
>> fixed by it. The workaround is not very suitable for multi platform
>> kernels, though, since its enabled also for unaffected platforms.
>>
>> As far as I can see the CONFIG_ARM_ERRATA_430973 flag is checked
>> in proc-v7.S and in proc-v7-2level.S. I think the first file is
>> irrelevant, since it can be fixed later (see workaround in
>> nokia_n900_legacy_init in pdata-quirks.c).
>
> Yes so it seems, and the bootloaders should really set it. It's
> also disabled for multiplatform builds.

These are now done in u-boot as of: v2015.04-rc4

http://git.denx.de/?p=u-boot.git;a=commit;h=c6f90e1418a84fe5fa463b38403bd1845cb6a59c

Regards,

-- 
Robert Nelson
https://rcn-ee.com/