summaryrefslogtreecommitdiff
path: root/Documentation/watchdog
diff options
context:
space:
mode:
authorWolfram Sang <wsa+renesas@sang-engineering.com>2018-12-17 22:33:14 +0300
committerWim Van Sebroeck <wim@linux-watchdog.org>2018-12-24 15:15:06 +0300
commite536f7304badbf15e2099f08b5d47fbbf111a624 (patch)
tree3fd584135855cc5e3f6cb5e40c89e0b64ddaab53 /Documentation/watchdog
parentd2b911db8b73bc6bfa163515b4ff142fb0dda66d (diff)
downloadlinux-e536f7304badbf15e2099f08b5d47fbbf111a624.tar.xz
watchdog: add documentation for PM usage
Add the first rule we recently agreed on. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.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>
Diffstat (limited to 'Documentation/watchdog')
-rw-r--r--Documentation/watchdog/watchdog-pm.txt19
1 files changed, 19 insertions, 0 deletions
diff --git a/Documentation/watchdog/watchdog-pm.txt b/Documentation/watchdog/watchdog-pm.txt
new file mode 100644
index 000000000000..7a4dd46e0d24
--- /dev/null
+++ b/Documentation/watchdog/watchdog-pm.txt
@@ -0,0 +1,19 @@
+The Linux WatchDog Timer Power Management Guide
+===============================================
+Last reviewed: 17-Dec-2018
+
+Wolfram Sang <wsa+renesas@sang-engineering.com>
+
+Introduction
+------------
+This document states rules about watchdog devices and their power management
+handling to ensure a uniform behaviour for Linux systems.
+
+
+Ping on resume
+--------------
+On resume, a watchdog timer shall be reset to its selected value to give
+userspace enough time to resume. [1] [2]
+
+[1] https://patchwork.kernel.org/patch/10252209/
+[2] https://patchwork.kernel.org/patch/10711625/