Hi,
There is the following page on the cubieboard.org website:
http://cubieboard.org/2014/01/13/upgrade-new-android-for-cubietruckv1-01/
It provides an SD card image, with the following description "We don’t
need it bootup, just clean some register value on PMU".
So I wonder if there is some storage space there to save the information
about the CPU and DRAM "speed grade"? Or if the space is too small,
then just some sort of a board type identifier might be also enough.
This identifier could be used as a key for a table look-up in the
u-boot bootloader to find the necessary information about the hardware.
Also if the AXP209 is no good, then maybe some other non-volatile memory
in the A10/A13/A20 SoC exists? I have read about EFUSE, but it looks
like the EFUSE power pin is typically grounded and nobody can write
anything there. Any other commonly used and easy/safe to autodetect
storage option in the sunxi hardware?
It looks like TWI1 is used for connecting EEPROM in the A10-Lime. And
TWI2 is used for VGA DDC in the Cubietruck. Are we up to having some
sort of a common "standard" at least for the development boards, so
that the same u-boot build could be used for all of them?
--
Best regards,
Siarhei Siamashka
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