watchdog: Update sysfs documentation.

Document the sysfs attributes:
	pretimeout
	pretimeout_available_governors
	pretimeout_governor

Signed-off-by: Jerry Hoemann <jerry.hoemann@hpe.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>

diff --git a/Documentation/ABI/testing/sysfs-class-watchdog b/Documentation/ABI/testing/sysfs-class-watchdog
index 736046b330405284d29d5384943a1145fd495164..6317ade5ad19a90c48a459aecd981122fde48df9 100644 (file)
--- a/Documentation/ABI/testing/sysfs-class-watchdog
+++ b/Documentation/ABI/testing/sysfs-class-watchdog
@@ -49,3 +49,26 @@ Contact:     Wim Van Sebroeck <wim@iguana.be>
 Description:
                It is a read only file. It is read to know about current
                value of timeout programmed.
+
+What:          /sys/class/watchdog/watchdogn/pretimeout
+Date:          December 2016
+Contact:       Wim Van Sebroeck <wim@iguana.be>
+Description:
+               It is a read only file. It specifies the time in seconds before
+               timeout when the pretimeout interrupt is delivered.  Pretimeout
+               is an optional feature.
+
+What:          /sys/class/watchdog/watchdogn/pretimeout_avaialable_governors
+Date:          February 2017
+Contact:       Wim Van Sebroeck <wim@iguana.be>
+Description:
+               It is a read only file. It shows the pretimeout governors
+               available for this watchdog.
+
+What:          /sys/class/watchdog/watchdogn/pretimeout_governor
+Date:          February 2017
+Contact:       Wim Van Sebroeck <wim@iguana.be>
+Description:
+               It is a read/write file. When read, the currently assigned
+               pretimeout governor is returned.  When written, it sets
+               the pretimeout governor.