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| author | Wolfram Sang <wsa+renesas@sang-engineering.com> | 2018-12-17 20:33:14 +0100 |
|---|---|---|
| committer | Wim Van Sebroeck <wim@linux-watchdog.org> | 2018-12-24 13:15:06 +0100 |
| commit | e536f7304badbf15e2099f08b5d47fbbf111a624 (patch) | |
| tree | 3fd584135855cc5e3f6cb5e40c89e0b64ddaab53 /Documentation/watchdog/watchdog-pm.txt | |
| parent | d2b911db8b73bc6bfa163515b4ff142fb0dda66d (diff) | |
| download | lwn-e536f7304badbf15e2099f08b5d47fbbf111a624.tar.gz lwn-e536f7304badbf15e2099f08b5d47fbbf111a624.zip | |
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/watchdog-pm.txt')
| -rw-r--r-- | Documentation/watchdog/watchdog-pm.txt | 19 |
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/ |