root@skyweather:~# modprobe bcm2709_wdog
modprobe: FATAL: Module bcm2709_wdog not found in directory /lib/modules/4.14.41-v7+
root@skyweather:~# modprobe bcm2708_wdog
modprobe: FATAL: Module bcm2708_wdog not found in directory /lib/modules/4.14.41-v7+
root@skyweather:~# modprobe bcm2708_wdt
modprobe: FATAL: Module bcm2708_wdt not found in directory /lib/modules/4.14.41-v7+
root@skyweather:~# modprobe bcm2709_wdt
modprobe: FATAL: Module bcm2709_wdt not found in directory /lib/modules/4.14.41-v7+
root@skyweather:~# ls -las /dev/watchdog
0 crw------- 1 root root 10, 130 May 26 22:05 /dev/watchdog
root@skyweather:~# lsmod
Module                  Size  Used by
cfg80211              573440  0
rfkill                 28672  2 cfg80211
snd_bcm2835            32768  0
snd_pcm                98304  1 snd_bcm2835
snd_timer              32768  1 snd_pcm
snd                    69632  3 snd_timer,snd_bcm2835,snd_pcm
i2c_bcm2835            16384  8
fixed                  16384  0
uio_pdrv_genirq        16384  0
uio                    20480  1 uio_pdrv_genirq
i2c_dev                16384  16
ip_tables              24576  0
x_tables               32768  1 ip_tables
ipv6                  434176  32
root@skyweather:~# bcm2835_wdt
-su: bcm2835_wdt: command not found
root@skyweather:~# modprobe bcm2835_wdt
root@skyweather:~# lsmod
Module                  Size  Used by
cfg80211              573440  0
rfkill                 28672  2 cfg80211
snd_bcm2835            32768  0
snd_pcm                98304  1 snd_bcm2835
snd_timer              32768  1 snd_pcm
snd                    69632  3 snd_timer,snd_bcm2835,snd_pcm
i2c_bcm2835            16384  8
fixed                  16384  0
uio_pdrv_genirq        16384  0
uio                    20480  1 uio_pdrv_genirq
i2c_dev                16384  16
ip_tables              24576  0
x_tables               32768  1 ip_tables
ipv6                  434176  32
root@skyweather:~# uname -a
Linux skyweather 4.14.41-v7+ #1113 SMP Thu May 17 16:29:48 BST 2018 armv7l GNU/Linux