[PATCH 2/5] arm: mvebu: Move internal registers in arch_very_early_init() function

[Pali Rohár]

On Wednesday 01 June 2022 12:44:01 Stefan Roese wrote:
> Hi Pali,
> 
> On 01.06.22 12:27, Pali Rohár wrote:
> > On Friday 06 May 2022 14:44:48 Pali Rohár wrote:
> > > On Friday 06 May 2022 14:35:55 Stefan Roese wrote:
> > > > While doing this I noticed though, that kwboot UART booting only worked
> > > > in roughly 1 out of 2 cases. With no progress after this line:
> > > > 
> > > > Sending boot message. Please reboot the target...\
> > > > 
> > > > IIRC, this worked more reliable a few weeks ago. Any idea, what might
> > > > have caused this regression - if I am correct here?
> > > 
> > > There were changes in handling of bootrom boot message. There is option
> > > -s which can change default timeout option. And plus there is option -a
> > > which sets this timeout option to AXP value.
> > > 
> > > Default value is 50 and for AXP default value is 1000.
> > > 
> > > Maybe it is needed to tune AXP value... Try to call with -s option
> > > between 50 and 1000...
> > 
> > Hello Stefan! Have you tried to tune kwboot's -s or -a option for AXP board?
> 
> Thanks for getting back on this. I totally forgot about it.
> 
> '-a' makes it actually worse. Zero success with 5 tries. '-s 10' worked
> 5 out of 5 times. So I'll stick with this version I think.
> 
> Thanks,
> Stefan

Ok! So I think that you could change KWBOOT_MSG_RSP_TIMEO_AXP value in
tools/kwboot.c to 10 if it works fine for your AXP board. So '-a' option
would work better.