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P1020RDB and Watchdog

Question asked by tom vogel on Nov 15, 2013
Latest reply on Nov 19, 2013 by Yiping Wang

I have a Freescale P1020rdb-pc development kit, Codewarrior Tap  and am using CodeWarrior 10.3 in Linux for development. (LinuxMint OS).

U boot source and toolchain is the from the Freescale SDK1.4 Yocto package.


U boot is working fine and I am currently building a suite of hardware tests starting from POST.

I was attempting to build a function to test the Watchdog and I have a couple of questions:


1) Can anyone point me to the correct reference manual that documents the watchdog timer registers. Reference is made to the TCR[WRC] register in the P1020 Reference Manual, but no details are given.


2) I looks as if uboot does not implement the internal watchdog in the p1020 correctly. I defined "CONFIG_WATCHDOG" but did not seem to work. Anyone had any experience here?


3) I noticed that the P1020RDB-PC has an external watchdog chip implemented.  I am assuming that this is optional should we wish to add a more reliable (external) watchdog to our own design.