linux-kernel - [PATCH v2 1/4] watchdog: da9052

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Message-Id: <20250325-da9052-fixes-v2-1-bfac3f07b4a4@gmail.com>
Date: Tue, 25 Mar 2025 08:27:12 +0100
From: Marcus Folkesson <marcus.folkesson@...il.com>
To: Support Opensource <support.opensource@...semi.com>, 
 Wim Van Sebroeck <wim@...ux-watchdog.org>, 
 Guenter Roeck <linux@...ck-us.net>
Cc: linux-watchdog@...r.kernel.org, linux-kernel@...r.kernel.org, 
 Marcus Folkesson <marcus.folkesson@...il.com>
Subject: [PATCH v2 1/4] watchdog: da9052_wdt: add support for nowayout

Add nowayout module parameter for not stopping the
watchdog when userspae application quits.

Signed-off-by: Marcus Folkesson <marcus.folkesson@...il.com>
---
 drivers/watchdog/da9052_wdt.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/watchdog/da9052_wdt.c b/drivers/watchdog/da9052_wdt.c
index 77039f2f0be54273df1666fe40c413b6c89285a1..a8ff1e6a7903f6f139c5bb60d7d92ca39077ee04 100644
--- a/drivers/watchdog/da9052_wdt.c
+++ b/drivers/watchdog/da9052_wdt.c
@@ -30,6 +30,12 @@ struct da9052_wdt_data {
 	unsigned long jpast;
 };
 
+static bool nowayout = WATCHDOG_NOWAYOUT;
+module_param(nowayout, bool, 0);
+MODULE_PARM_DESC(nowayout,
+		 "Watchdog cannot be stopped once started (default="
+		 __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+
 static const struct {
 	u8 reg_val;
 	int time;  /* Seconds */
@@ -172,6 +178,7 @@ static int da9052_wdt_probe(struct platform_device *pdev)
 	da9052_wdt->ops = &da9052_wdt_ops;
 	da9052_wdt->parent = dev;
 	watchdog_set_drvdata(da9052_wdt, driver_data);
+	watchdog_set_nowayout(da9052_wdt, nowayout);
 
 	if (da9052->fault_log & DA9052_FAULTLOG_TWDERROR)
 		da9052_wdt->bootstatus |= WDIOF_CARDRESET;

-- 
2.48.1