We have to wait at least the minimium time for the watchdog window
(TWDMIN) before writings to the wdt register after the
watchdog is activated.
Otherwise the chip will assert TWD_ERROR and power down to reset mode.

Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Marcus Folkesson <marcus.folkesson@gmail.com>
---
 drivers/watchdog/da9052_wdt.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/watchdog/da9052_wdt.c b/drivers/watchdog/da9052_wdt.c
index 5bef70cb74b36412b427f5cf7255f16b8eb00ac7..afb7887c3a1e865d3c581c5ab77bb91a5533ff07 100644
--- a/drivers/watchdog/da9052_wdt.c
+++ b/drivers/watchdog/da9052_wdt.c
@@ -180,6 +180,7 @@ static int da9052_wdt_probe(struct platform_device *pdev)
 	da9052_wdt = &driver_data->wdt;
 
 	da9052_wdt->timeout = DA9052_DEF_TIMEOUT;
+	da9052_wdt->min_hw_heartbeat_ms = DA9052_TWDMIN;
 	da9052_wdt->info = &da9052_wdt_info;
 	da9052_wdt->ops = &da9052_wdt_ops;
 	da9052_wdt->parent = dev;

-- 
2.48.1