[OpenWrt-Devel] uboot-lantiq cgu settings for ramboot image

Ben Mulvihill ben.mulvihill at gmail.com
Mon Jan 19 09:44:57 EST 2015

On Mon, 2015-01-19 at 11:51 +0000, Conor O'Gorman wrote:
> On 19/01/15 10:46, Ben Mulvihill wrote:
> > Hello,
> >
> > I am trying to build uboot-lantiq for the BT Home Hub 3A (lantiq
> > ar9), and am wondering where to initialise the cgu, in the case
> > of a ramboot image for uart booting. Normally the cgu is initialised
> > in lowlevel_init, but that code is bypassed in ramboot images. The
> > result is that the board boots with the wrong cgu settings, which
> > sends the console haywire. So far I have tried two solutions:
> Another option is to try and not change anything. The console is already 
> configured and running. The ram does need config.
> I was used to seeing the ramboot version running at half clock speed, at 
> least on danube, previous to ar9.
> Conor

Hi Conor,

Thanks for the reply. But with the latest uboot-lantiq, not changing
anything means that I don't get a usable console. With an older 
version I do at least get a uboot console, but no linux console when
I boot openwrt. Correcting the cgu settings solves both problems.

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