##############################
    TEST CASE 1
    Previous Image
##############################
SONiC.HEAD.54-b62e120c

root@sonic:~# show reboot-cause
Unknown reboot cause

root@sonic:~#

root@sonic:~# ls -l /host/reboot-cause/
total 8
-rw-r--r-- 1 root root 21 Dec 17 14:42 previous-reboot-cause.txt
-rw-r--r-- 1 root root 18 Dec 17 14:42 reboot-cause.txt
root@sonic:~#



root@sonic:/sys/devices/platform/SMF.512/hwmon/hwmon*# ls -l mb_poweron_reason
ls: cannot access 'mb_poweron_reason': No such file or directory
root@sonic:/sys/devices/platform/SMF.512/hwmon/hwmon*#

##############################
    TEST CASE 2
    PowerCycle from old_image to image_with_fix
##############################

root@sonic:~# show reboot-cause
Power Loss
root@sonic:~#

root@sonic:~# cat /sys/devices/platform/SMF.512/hwmon/hwmon*/mb_poweron_reason
0xbb
root@sonic:~#

root@sonic:~# cat /host/reboot-cause/platform/reboot_reason
None
root@sonic:~#

##############################
    TEST CASE 3
    Upgrade from old_image to image_with_fix
##############################
root@sonic:~#
root@sonic:~# show reboot-cause
User issued 'reboot' command [User: admin, Time: Tue Dec 17 14:55:10 UTC 2019]
root@sonic:~# 
root@sonic:~# cat /sys/devices/platform/SMF.512/hwmon/hwmon*/mb_poweron_reason
0xaa
root@sonic:~#

root@sonic:~# cat /host/reboot-cause/platform/reboot_reason
None
root@sonic:~#

##############################
    TEST CASE 4
    Watchdog
##############################
root@sonic:~# python
Python 2.7.13 (default, Sep 26 2018, 18:42:22)
[GCC 6.3.0 20170516] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> from sonic_platform.watchdog import Watchdog
>>> wd = Watchdog()
>>> wd.arm(30)
30
>>>


root@sonic:~# show reboot-cause
Watchdog
root@sonic:~#

root@sonic:~# cat /sys/devices/platform/SMF.512/hwmon/hwmon*/mb_poweron_reason
0xdd
root@sonic:~#

root@sonic:~# cat /host/reboot-cause/platform/reboot_reason
None
root@sonic:~#

root@sonic:~# python
Python 2.7.13 (default, Sep 26 2018, 18:42:22)
[GCC 6.3.0 20170516] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> from sonic_platform.chassis import Chassis
>>> c = Chassis()
>>> c.get_reboot_cause()
('Watchdog', None)
>>>

##############################
    TEST CASE 5
    Watchdog one more time
##############################
root@sonic:~# python
Python 2.7.13 (default, Sep 26 2018, 18:42:22)
[GCC 6.3.0 20170516] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> from sonic_platform.watchdog import Watchdog
>>> w = Watchdog()
>>> w.arm(30)
30
>>>


root@sonic:~# show reboot-cause
Watchdog
root@sonic:~#

root@sonic:~# cat /sys/devices/platform/SMF.512/hwmon/hwmon*/mb_poweron_reason
0xdd
root@sonic:~#

root@sonic:~# cat /host/reboot-cause/platform/reboot_reason
None
root@sonic:~#

root@sonic:~# python
Python 2.7.13 (default, Sep 26 2018, 18:42:22)
[GCC 6.3.0 20170516] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> from sonic_platform.chassis import Chassis
>>> ch = Chassis()
>>> ch.get_reboot_cause()
('Watchdog', None)
>>>


##############################
    TEST CASE 6
    Fast reboot
##############################
root@sonic:~# show reboot-cause
User issued 'fast-reboot' command [User: admin, Time: Tue Dec 17 15:41:05 UTC 2019]
root@sonic:~#

root@sonic:~# cat /sys/devices/platform/SMF.512/hwmon/hwmon*/mb_poweron_reason
0xaa
root@sonic:~#

root@sonic:~# cat /host/reboot-cause/platform/reboot_reason
None
root@sonic:~#

root@sonic:~# python
Python 2.7.13 (default, Sep 26 2018, 18:42:22)
[GCC 6.3.0 20170516] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> from sonic_platform.chassis import Chassis
>>> ch = Chassis()
>>> ch.get_reboot_cause()
('Non-Hardware', None)
>>>

##############################
    TEST CASE 7
    Warm reboot
##############################
root@sonic:~# show reboot-cause
User issued 'warm-reboot' command [User: admin, Time: Tue Dec 17 16:03:24 UTC 2019]
root@sonic:~#

root@sonic:~# cat /sys/devices/platform/SMF.512/hwmon/hwmon*/mb_poweron_reason
0xaa
root@sonic:~#

root@sonic:~# cat /host/reboot-cause/platform/reboot_reason
None
root@sonic:~#

root@sonic:~# python
Python 2.7.13 (default, Sep 26 2018, 18:42:22)
[GCC 6.3.0 20170516] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> from sonic_platform.chassis import Chassis
>>> c = Chassis()
>>> c.get_reboot_cause()
('Non-Hardware', None)
>>>


##############################
    TEST CASE 8
    Thermal
##############################
root@sonic:~# show reboot-cause
Thermal Overload: ASIC
root@sonic:~#

root@sonic:~# cat /sys/devices/platform/SMF.512/hwmon/hwmon*/mb_poweron_reason
0xee
root@sonic:~#

root@sonic:~# cat /host/reboot-cause/platform/reboot_reason
33
root@sonic:~#

root@sonic:~# python
Python 2.7.13 (default, Sep 26 2018, 18:42:22)
[GCC 6.3.0 20170516] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> from sonic_platform.chassis import Chassis
>>> c = Chassis()
>>> c.get_reboot_cause()
('Thermal Overload: ASIC', None)
>>>

##############################
    TEST CASE 9
    Subsequent Thermal
##############################
root@sonic:~# show reboot-cause
Unknown POR: 33 RST: 11 MBR: 0xee
root@sonic:~#

root@sonic:~# cat /sys/devices/platform/SMF.512/hwmon/hwmon*/mb_poweron_reason
0x99
root@sonic:~#

root@sonic:~# cat /host/reboot-cause/platform/reboot_reason
33
root@sonic:~#

##############################
    TEST CASE 10
    PowerCycle
##############################
root@sonic:~# show reboot-cause
Power Loss
root@sonic:~#

root@sonic:~# cat /sys/devices/platform/SMF.512/hwmon/hwmon*/mb_poweron_reason
0xbb
root@sonic:~#

root@sonic:~# cat /host/reboot-cause/platform/reboot_reason
None
root@sonic:~#

root@sonic:~# python
Python 2.7.13 (default, Sep 26 2018, 18:42:22)
[GCC 6.3.0 20170516] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> from sonic_platform.chassis import Chassis
>>> c = Chassis()
>>> c.get_reboot_cause()
('Power Loss', None)
>>>


##############################
    TEST CASE 11
    Reboot
##############################
root@sonic:~# show reboot-cause
User issued 'reboot' command [User: admin, Time: Tue Dec 17 16:19:36 UTC 2019]
root@sonic:~#

root@sonic:~# cat /sys/devices/platform/SMF.512/hwmon/hwmon*/mb_poweron_reason
0xaa
root@sonic:~#

root@sonic:~#  cat /host/reboot-cause/platform/reboot_reason
None
root@sonic:~#

root@sonic:~# python
Python 2.7.13 (default, Sep 26 2018, 18:42:22)
[GCC 6.3.0 20170516] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> from sonic_platform.chassis import Chassis
>>> c = Chassis()
>>> c.get_reboot_cause()
('Non-Hardware', None)
>>>

##############################
    TEST CASE 12
    Kernel panic
##############################
root@sonic:~# show reboot-cause
Unknown software reboot
root@sonic:~#

root@sonic:~# cat /sys/devices/platform/SMF.512/hwmon/hwmon*/mb_poweron_reason
0x99
root@sonic:~# 

root@sonic:~# cat /host/reboot-cause/platform/reboot_reason
None
root@sonic:~#

root@sonic:~# python
Python 2.7.13 (default, Sep 26 2018, 18:42:22)
[GCC 6.3.0 20170516] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> from sonic_platform.chassis import Chassis
>>> c = Chassis()
>>> c.get_reboot_cause()
('Non-Hardware', None)
>>>