From e536f7304badbf15e2099f08b5d47fbbf111a624 Mon Sep 17 00:00:00 2001 From: Wolfram Sang Date: Mon, 17 Dec 2018 20:33:14 +0100 Subject: [PATCH] watchdog: add documentation for PM usage Add the first rule we recently agreed on. Signed-off-by: Wolfram Sang Reviewed-by: Guenter Roeck Signed-off-by: Guenter Roeck Signed-off-by: Wim Van Sebroeck --- Documentation/watchdog/watchdog-pm.txt | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) create mode 100644 Documentation/watchdog/watchdog-pm.txt 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 + +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/