[U-Boot] Trying to load old kernel with new u-boot

DaveKucharczyk david.kucharczyk at gmail.com
Thu Sep 17 15:15:52 CEST 2015


Fabio Estevam-2 wrote
> I meant "different parents for the uart clock"

Fabio, that would make sense why it doesn't work when setting 2014 u-boot
CSCDR1 to the value in 2009 u-boot. I can check all the combinations of
clock division I want and it's never going to work since the parent is
different. 

The patch for u-boot 2009.08 states...
------------------
Subject: [PATCH] ENGR00133727: uart outputs messy code when kernel starts on
mx51

uart outputs messy code when kernel starts on mx51.
Change uart clock to use pll2 as source clock.
------------------

Looks like we never implemented that patch in our 2009 u-boot. 
Looks like that patch made it to 2014 u-boot.

So I tried setting the uart clock parent to default in u-boot 2014 in
arch/arm/cpu/armv7/mx5/lowlevel_init.S, but still the same thing happens. 

Any suggestions?

Basically I want kernel 2.6.35 to boot cleanly on the console using u-boot
2014 on an mx51 board. 



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