linux-kernel - uboot watchdog and linux kernel

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Message-ID: <20160506131156.GB4072@arthur-bzh>
Date:	Fri, 6 May 2016 15:11:56 +0200
From:	Arthur LAMBERT <lambertarthur22@...il.com>
To:	linux-kernel@...r.kernel.org
Subject: uboot watchdog and linux kernel

I am working on custom imx6 board with linux 3.14.52. I am trying to use hardware
watchdog from uboot. I am able to enable with success the watchdog in uboot.
Booting with an invalid kernel will reboot the board after timeout. Problem is in
linux side. I have some random reboot sometimes. I am not able to understand where
is the code to ping the uboot hardware watchdog in linux kernel.

* There is no /dev/watchdog entry associate to my uboot watchdog (there are entries
only for pmic watchdog)
* Only code where I find ping of uboot watchdog seems to be in imx2 watchdog driver.
But this driver is not enable in my kernel config. But if noone is pinging the watchdog,
why I am able to play with my board during few hours sometimes ??

Thanks,
Arthur.