Re: Initialization of Timer Clock on the MPC8260

[annamaya <annamaya@yahoo.com>]

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OK Wolfgang. Noone has posted an answer to this
question in the U-Boot mailing list. So, I still need
help with this. :-)

I am looking at the support for one of your own
boards, the TQM8260. I dont see PC25, PC27 and PC26
being configured anywhere. And PC29 is configured as
an SCC1 CLSN signal. Therefore, I think the internal
BRGCLK is used as an input to the timerclk. Now, if
this was true, BRGC1 should have been programmed to
generate either 4MHz or 32KHz clock. But I dont see
this being done anywhere else in the code. I am
missing something and I am not sure what that is.

Thanks much for your help.


--- annamaya <annamaya@yahoo.com> wrote:

> Hello Wolfgang,
> 
> I will surely post this in the U-Boot forums. I just
> did not know where it was but I think I've found it
> now. I still had the address to the PPCBOOT mailist
> lists. I miss the good old days. :-)
> 
> And to answer you questions, yes, I did look at the
> GPIO pins for all the 8260 boards and not one of
> them
> was configured to be a clock. And I was unable to
> find
> the setbrg() routine elsewhere to set brgc1 to be
> the
> input for timerclk.
> 
> -Navin.
> 
> --- Wolfgang Denk <wd@denx.de> wrote:
> 
> > In message
> >
> <20041214230712.79751.qmail@web53805.mail.yahoo.com>
> > you wrote:
> > > I am not sure if this is the right place to ask
> > this
> > > question since this may be a U-Boot question. I
> am
> > 
> > Why do you ask here and not on the U-Boot mailing
> > list then?
> > 
> > > trying to understand how the source for the
> timer
> > > clock is selected on this processor. Figure 4-3
> > tries
> > > to explain this but I am unable to find code in
> > U-Boot
> > > that actually sets either BRG1 or one of the
> GPIO
> > pins
> > > to act as inputs for the timer clock generation.
> > Can
> > > someone point me to the right place in the code
> > where
> > 
> > Well, did you check the place where all GPIO pins
> > get initialized, i. e. board/<name>/<name>.c ?
> > 
> > Best regards,
> > 
> > Wolfgang Denk
> > 
> > -- 
> > Software Engineering:  Embedded and Realtime
> > Systems,  Embedded Linux
> > Phone: (+49)-8142-66989-10 Fax:
> (+49)-8142-66989-80
> > Email: wd@denx.de
> > "To take a significant step forward, you must make
> a
> > series of finite
> > improvements." - Donald J. Atwood, General Motors
> > 
> 
> 
> 
> 		
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