watchdog: rti_wdt: Set min_hw_heartbeat_ms to accommodate a safety margin

commit 0f733618da334a329c211d690975b12477253dca from
git://git.ti.com/ti-linux-kernel/ti-linux-kernel.git



commit cae58516 upstream

On AM62x, the watchdog is pet before the valid window is open. Fix
min_hw_heartbeat and accommodate a 2% + static offset safety margin.
The static offset accounts for max hardware error.

Remove the hack in the driver which shifts the open window boundary,
since it is no longer necessary due to the fix mentioned above.

Fixes: 5527483f ("watchdog: rti-wdt: attach to running watchdog during probe")
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20240417205700.3947408-1-jm@ti.com


Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
Signed-off-by: Judith Mendez <jm@ti.com>
Signed-off-by: Xulin Sun <xulin.sun@windriver.com>