[Buildroot] RPi B+ update

[Peter Seiderer <ps.report@gmx.net>]

Hello Marco,

On Tue, 16 May 2017 21:32:26 +0200, Marco Trapanese <marcotrapanese@gmail.com> wrote:

> Hi!
> A couple of years ago (it was in 2015) I built a buildroot environment 
> for RPi B+. We ended up with an sd-card image that was cloned for every 
> installation.
> This months we've bought some other RPi B+ but with this batch the 
> system refuses to boot: it hangs with black screen and the raspberry 
> icon at the top-left corner.
> 
> We're aware they have changed the RAM chips (from Samsung to Elpida) and 
> likely we should update the drivers with the new ones.
> 
> Here the buildroot related question: is it possible to change something 
> in the current sd-card image instead of updating and rebuilding the 
> whole system?

You can try to exchange only the firmware, device tree and the linux
kernel files on the first partition of the sd-card image with ones from
an actual build (after testing if the actual complete sd-card image
boots well)...

Regards,
Peter

> 
> This is because if we need to go with the second option we're going to 
> deeply upgrade the application and this is not affordable right now.
> 
> Of course, feel free to ask any details you need to try to help me!
> 
> Thanks in advance!
> Marco
> 
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