linux-kernel - [PATCH] watchdog: gpio: add support for nowayout option

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Date:   Tue, 28 May 2019 10:09:47 +0100
From:   Mans Rullgard <mans@...sr.com>
To:     Wim Van Sebroeck <wim@...ux-watchdog.org>,
        Guenter Roeck <linux@...ck-us.net>
Cc:     linux-watchdog@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] watchdog: gpio: add support for nowayout option

Add support for the nowayout option in the gpio watchdog driver.

Signed-off-by: Mans Rullgard <mans@...sr.com>
---
 drivers/watchdog/gpio_wdt.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/watchdog/gpio_wdt.c b/drivers/watchdog/gpio_wdt.c
index ea77cae03c9d..63792bb70213 100644
--- a/drivers/watchdog/gpio_wdt.c
+++ b/drivers/watchdog/gpio_wdt.c
@@ -17,6 +17,12 @@
 #include <linux/platform_device.h>
 #include <linux/watchdog.h>
 
+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) ")");
+
 #define SOFT_TIMEOUT_MIN	1
 #define SOFT_TIMEOUT_DEF	60
 
@@ -155,6 +161,7 @@ static int gpio_wdt_probe(struct platform_device *pdev)
 	priv->wdd.timeout	= SOFT_TIMEOUT_DEF;
 
 	watchdog_init_timeout(&priv->wdd, 0, &pdev->dev);
+	watchdog_set_nowayout(&priv->wdd, nowayout);
 
 	watchdog_stop_on_reboot(&priv->wdd);
 
-- 
2.21.0