Watchdog reset trigger for eMMC

From	Anand Moon <linux.amoon@gmail.com>
Newsgroups	linux.kernel
Subject	Watchdog reset trigger for eMMC
Date	2016-04-30 08:10 +0200
Message-ID	<rtwgi-2Us-3@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

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Hi All,

Using microSD card when I try to write into /dev/watchdog device
it triggers reboot of the board after timer expires.
-----------------------------------------------------------------------------------------------
root@odroidxu4l:~# echo 3 > /dev/watchdog
[ 1659.021844] watchdog: watchdog0: watchdog did not stop!
root@odroidxu4l:~#
root@odroidxu4l:~#
root@odroidxu4l:~#
root@odroidxu4l:~#
root@odroidxu4l:~#

U-Boot 2016.03-00665-g563d8d9-dirty (Apr 04 2016 - 22:27:07 +0930) for
ODROID-XU
                3

CPU:   Exynos5422 @ 800 MHz
Model: Odroid XU3 based on EXYNOS5422
Board: Odroid XU3 based on EXYNOS5422
Type:  xu4
DRAM:  2 GiB
-----------------------------------------------------------------------------------------------
But when I try this on eMMC it just freezes.
I know we have to set and unset gpio pin (SD_0.RST) to trigger reset
before reboot.
-----------------------------------------------------------------------------------------------
root@odroidxu4e:~# echo 4 > /dev/watchdog
[  639.192617] [c3] watchdog watchdog0: watchdog did not stop!
root@odroidxu4e:~#
root@odroidxu4e:~#
root@odroidxu4e:~#
-----------------------------------------------------------------------------------------------
I would like to know what is way board reset after watchdog reset after timeout.

Best Regards
-Anand Moon

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Thread

Watchdog reset trigger for eMMC Anand Moon <linux.amoon@gmail.com> - 2016-04-30 08:10 +0200
  Re: Watchdog reset trigger for eMMC Marek Szyprowski <m.szyprowski@samsung.com> - 2016-05-02 08:30 +0200
    Re: Watchdog reset trigger for eMMC Anand Moon <linux.amoon@gmail.com> - 2016-05-03 04:40 +0200

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