watchdog: da9052_wdt: respect TWDMIN

[ Upstream commit 325f510fcd9cda5a44bcb662b74ba4e3dabaca10 ]

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.

Signed-off-by: Marcus Folkesson <marcus.folkesson@gmail.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20250326-da9052-fixes-v3-4-a38a560fef0e@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/watchdog/da9052_wdt.c b/drivers/watchdog/da9052_wdt.c
index d708c091bf1b1e3327a134d4d2244d4b883d14e4..180526220d8c427c465715189e58e0acc3a4d0d8 100644 (file)
--- a/drivers/watchdog/da9052_wdt.c
+++ b/drivers/watchdog/da9052_wdt.c
@@ -164,6 +164,7 @@ 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;