[U-Boot] Watchdog support for ppc4xx

[Wolfgang Denk]

Dear "Mark Maestas",

In message <B02FCC6065C3164C8228CF04AB049EAC0114CCDA at srv-01.aplabs.com> you wrote:
> 
> I am not having luck with watchdog enabled on the ppc4xx target.  The
> board is doing a reset before Linux gets a chance to load.  I have added

Please define exactly what you mean by "before Linux gets a chance to
load" - is it resetting in U-Boot, or after passsing control to the
Linux kernel?

> more WATCHDOG_RESET commands in the image file just to see if that helps

What does "in the image file" mean?

> and it does not seem to.  Even though the reset function gets called it
> is still getting reset.  According to the ppc 440 documentation the

By "reset function" you actually mean the code that is supposed to
trigger the watchdog? Otherwise - the reset function is supposed to
reset the system, so everthing would be OK then.

> TSR[WIS] bit should get cleared to reset the timer and the code is doing
> that.  I don't understand why the board keeps resetting.  

This depends on the hardware, and obviously on the code doing this
(keep in mind that using I/O accessors is mandatory these days).

Best regards,

Wolfgang Denk

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