--- /dev/null
+From b8fc5eecdc5d33cf261986436597b5482ab856da Mon Sep 17 00:00:00 2001
+Date: Sun, 14 Nov 2021 19:45:32 +0100
+Subject: [PATCH] realtek: Backport Realtek Otto WDT driver
+
+Add patch submitted upstream to linux-watchdog and replace the MIPS
+architecture symbols. Requires one extra patch for the DIV_ROUND_*
+macros, which have moved to a different header since 5.10.
+
+---
+ drivers/watchdog/Kconfig | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+--- a/drivers/watchdog/Kconfig
++++ b/drivers/watchdog/Kconfig
+@@ -956,10 +956,10 @@ config RTD119X_WATCHDOG
+
+ config REALTEK_OTTO_WDT
+ tristate "Realtek Otto MIPS watchdog support"
+- depends on MACH_REALTEK_RTL || COMPILE_TEST
++ depends on RTL83XX
+ depends on COMMON_CLK
+ select WATCHDOG_CORE
+- default MACH_REALTEK_RTL
++ default RTL83XX
+ help
+ Say Y here to include support for the watchdog timer on Realtek
+ RTL838x, RTL839x, RTL930x SoCs. This watchdog has pretimeout