[devices]: Watchdog enable/disable in DellEMC S6100 (sonic-net#2730)

Author: paavaanan

platform/broadcom/sonic-platform-modules-dell/debian/platform-modules-s6100.install

@@ -6,5 +6,7 @@ common/fstrim.timer etc/systemd/system
 common/fstrim.service etc/systemd/system
 common/platform_reboot usr/share/sonic/device/x86_64-dell_s6100_c2538-r0
 s6100/scripts/platform_sensors.py usr/local/bin
+s6100/scripts/platform_watchdog_enable.sh usr/local/bin
+s6100/scripts/platform_watchdog_disable.sh usr/local/bin
 s6100/scripts/sensors usr/bin
 s6100/systemd/platform-modules-s6100.service etc/systemd/system

platform/broadcom/sonic-platform-modules-dell/s6100/scripts/platform_watchdog_disable.sh

@@ -0,0 +1,13 @@
+#!/bin/bash
+#This script is used to disable SMF Watchdog Timer
+
+wd_status=-1
+enabled=0
+
+# Disable Watchdog if enabled
+wd_status=$(io_rd_wr.py  --get --offset 0x207 | cut -d " " -f3)
+
+if [[ $wd_status -eq $enabled ]]; then
+    echo "Disabling Watchdog Timer.."
+    io_rd_wr.py --set --val 1 --offset 0x207
+fi

platform/broadcom/sonic-platform-modules-dell/s6100/scripts/platform_watchdog_enable.sh

@@ -0,0 +1,8 @@
+#!/bin/bash
+#This script is used to enable SMF Watchdog Timer
+
+# Set watchdog to 180 seconds
+io_rd_wr.py --set --val 3 --offset 0x206
+
+# Enable watchdog timer
+io_rd_wr.py --set --val 0 --offset 0x207

platform/broadcom/sonic-platform-modules-dell/s6100/scripts/s6100_platform.sh

@@ -226,6 +226,11 @@ if [[ "$1" == "init" ]]; then
     modprobe dell_s6100_iom_cpld
     modprobe dell_s6100_lpc
 
+    # Disable Watchdog Timer
+    if [[ -e /usr/local/bin/platform_watchdog_disable.sh ]]; then
+        exec /usr/local/bin/platform_watchdog_disable.sh
+    fi
+
     cpu_board_mux "new_device"
     switch_board_mux "new_device"
     sys_eeprom "new_device"