From: Shubham Chakraborty <chakrabortyshubham66@gmail.com>
To: Wim Van Sebroeck <wim@linux-watchdog.org>,
Guenter Roeck <linux@roeck-us.net>,
Jonathan Corbet <corbet@lwn.net>,
Shuah Khan <skhan@linuxfoundation.org>,
linux-watchdog@vger.kernel.org, linux-doc@vger.kernel.org,
linux-kernel@vger.kernel.org
Cc: Shubham Chakraborty <chakrabortyshubham66@gmail.com>
Subject: [PATCH] docs: watchdog: explain watchdog API options
Date: Wed, 11 Mar 2026 17:46:01 +0530 [thread overview]
Message-ID: <20260311121602.139967-1-chakrabortyshubham66@gmail.com> (raw)
Replace FIXME comment with proper documentation for
WDIOS_DISABLECARD, WDIOS_ENABLECARD, and WDIOS_TEMPPANIC
options.
Signed-off-by: Shubham Chakraborty <chakrabortyshubham66@gmail.com>
---
Documentation/watchdog/watchdog-api.rst | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/Documentation/watchdog/watchdog-api.rst b/Documentation/watchdog/watchdog-api.rst
index 78e228c272cf..984f7362d5fb 100644
--- a/Documentation/watchdog/watchdog-api.rst
+++ b/Documentation/watchdog/watchdog-api.rst
@@ -268,4 +268,13 @@ The following options are available:
WDIOS_TEMPPANIC Kernel panic on temperature trip
================= ================================
-[FIXME -- better explanations]
+The WDIOS_DISABLECARD option allows you to stop the watchdog timer via
+software. Note that this will only work if the "nowayout" module parameter
+(or CONFIG_WATCHDOG_NOWAYOUT) is not set.
+
+The WDIOS_ENABLECARD option turns on the watchdog timer.
+
+The WDIOS_TEMPPANIC option is used by some drivers (like the pcwd driver)
+to trigger a system halt (typically a kernel panic or power off) when the
+temperature trip point is reached. This ensures that the system is halted
+immediately in case of an overheat condition.
--
2.53.0
next reply other threads:[~2026-03-11 12:16 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-11 12:16 Shubham Chakraborty [this message]
2026-03-24 12:41 ` [PATCH] docs: watchdog: explain watchdog API options Guenter Roeck
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