[U-Boot-Users] DaVinci DM644x timer problem (divided by 16)

[Pieter Voorthuijsen]

Hi Dirk,

If I understand correctly: When the timer wraps around, flash writes or
other long lasting actions get timed-out. 

Currently the timer is in 32 bit unchained mode, why not place it 64 bit
mode?

Best regards, Pieter

-----Original Message-----
From: Dirk Behme [mailto:dirk.behme at googlemail.com] 
Sent: donderdag 20 maart 2008 15:25
To: Pieter Voorthuijsen
Cc: u-boot-users at lists.sourceforge.net
Subject: Re: [U-Boot-Users] DaVinci DM644x timer problem (divided by 16)

Pieter Voorthuijsen wrote:
> Hello,
> 
> Some months ago, a patch was submitted ([ARM] fix timer overflow in 
> DaVinci). The result was that in /cpu/arm926ejs/davinci/timer.c 
> read_timer was divided by 16.
> 
> http://www.denx.de/cgi-bin/gitweb.cgi?p=u-boot.git;a=commit;h=ea686f52
> e4
> 5b3df2938866d3f5a98bb2556dfe2b
> 
> Right now, when I have my bootdelay variable (on a DVEVM) set to 2, 
> and countdown takes 32 seconds... Also iprobe got very very  very
slow.
> Maybe more items are affected by this timer division.
> 
> Is anybody else seeing this? Clearly when the timer is used by several

> blocks, it cannot be easily divided by 16. I think we need something 
> else to work with the wrap around of the timer...

Thanks for the report!

Any idea what might be better?

Thanks

Dirk