[U-Boot] Uboot RTC question

[U-Boot] Uboot RTC question

[Steven Zedeck]

Hi,
I am using Uboot 2008.10. I know its old but thats what we used when we
started our project.

My question is why is it that when we get to the Uboot prompt upon a power
cycle, the date is set to:
2007-00-01 00:00:00

Where is that being set/initialized? I looked through the code and I can't
determine where this is being set.

Is that what the date should be? Does Uboot force it somewhere?

Our processor is the Atmel AT91SAM9RL.

thanks,
Steve
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[U-Boot] Uboot RTC question

[Wolfgang Denk]

Dear Steven Zedeck,

In message <27471322.post@talk.nabble.com> you wrote:
> 
> My question is why is it that when we get to the Uboot prompt upon a power
> cycle, the date is set to:
> 2007-00-01 00:00:00
> 
> Where is that being set/initialized? I looked through the code and I can't
> determine where this is being set.
> 
> Is that what the date should be? Does Uboot force it somewhere?
> 
> Our processor is the Atmel AT91SAM9RL.

We don't know what your board is, and if it's in mainline so we can
actually look at the code.

In a quick scan I didn't see any code in mainline which sets such a
date (which is wrong, in any case, as there is no month 00 in any of
the common notations).

Is there a chance that this is actually your own custom code?

Best regards,

Wolfgang Denk

-- 
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
"Who is the oldest inhabitant of this village?"
"We haven't got one; we had one, but he died three weeks ago."

[U-Boot] Uboot RTC question

[Steven Zedeck]

wd wrote:
> 
> Dear Steven Zedeck,
> 
> In message <27471322.post@talk.nabble.com> you wrote:
>> 
>> My question is why is it that when we get to the Uboot prompt upon a
>> power
>> cycle, the date is set to:
>> 2007-00-01 00:00:00
>> 
>> Where is that being set/initialized? I looked through the code and I
>> can't
>> determine where this is being set.
>> 
>> Is that what the date should be? Does Uboot force it somewhere?
>> 
>> Our processor is the Atmel AT91SAM9RL.
> 
> We don't know what your board is, and if it's in mainline so we can
> actually look at the code.
> 
> In a quick scan I didn't see any code in mainline which sets such a
> date (which is wrong, in any case, as there is no month 00 in any of
> the common notations).
> 
> Is there a chance that this is actually your own custom code?
> 
> Best regards,
> 
> Wolfgang Denk
> 
> -- 
> DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
> HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
> Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
> "Who is the oldest inhabitant of this village?"
> "We haven't got one; we had one, but he died three weeks ago."
> _______________________________________________
> U-Boot mailing list
> U-Boot at lists.denx.de
> http://lists.denx.de/mailman/listinfo/u-boot
> 
> 

As for my board, its based on the Atmel AT91SAM9RLEK board.

I inherited this code. So I am still looking through the code to see where
the RTC is being set.
All I know at the moment is that whenever I power cycle and stop at the
Uboot prompt, then type "date" I see that date/time:
U-Boot> date
at91_rtc_readtime(): 2007-00-01 00:00:xx
Date: 2007-00-01     Time:  0:00:xx

xx increments depending on when I type the date command.
I just wonder where this year/month is being initialized.

thanks,
Steve

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[U-Boot] Uboot RTC question

[Wolfgang Denk]

Dear Steven Zedeck,

In message <27472886.post@talk.nabble.com> you wrote:
> 
> wd wrote:

There is absolutely no need to full-quote my message if you are not
referring to anything I wrote.

Hm, did you even read what I wrote?

> > We don't know what your board is, and if it's in mainline so we can
> > actually look at the code.
...
> As for my board, its based on the Atmel AT91SAM9RLEK board.

This is not an answer to my question.

I assume your code is NOT in mainline.

> I inherited this code. So I am still looking through the code to see where
> the RTC is being set.
> All I know at the moment is that whenever I power cycle and stop at the
> Uboot prompt, then type "date" I see that date/time:
> U-Boot> date
> at91_rtc_readtime(): 2007-00-01 00:00:xx
> Date: 2007-00-01     Time:  0:00:xx
> 
> xx increments depending on when I type the date command.
> I just wonder where this year/month is being initialized.

Well, eventually your RTC is not battery buffered, and when it comes
up from power-on it initiallizes it's registers with values that, when
read out, get interpreted as this specific date.

There is no such function as at91_rtc_readtime() in mainline code, so
locate it in your sources, and debug it.

Best regards,

Wolfgang Denk

-- 
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
"If the code and  the  comments  disagree,  then  both  are  probably
wrong."                                                - Norm Schryer