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authorOleksij Rempel <o.rempel@pengutronix.de>2019-10-24 08:03:42 +0200
committerSascha Hauer <s.hauer@pengutronix.de>2019-10-29 10:23:43 +0100
commit3c38c8470e60cda83cd059b826d8a627725643fc (patch)
treed0cd034b32d162ba6cfcc83704a82d688a7d738b /Documentation
parente857e4930aef1aa11dfbb1c45069d0fe562eeedc (diff)
downloadbarebox-3c38c8470e60cda83cd059b826d8a627725643fc.tar.gz
doc: watchdog: add note about danger of autoping
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/user/watchdog.rst6
1 files changed, 6 insertions, 0 deletions
diff --git a/Documentation/user/watchdog.rst b/Documentation/user/watchdog.rst
index 26e347d..02bd576 100644
--- a/Documentation/user/watchdog.rst
+++ b/Documentation/user/watchdog.rst
@@ -29,6 +29,12 @@ enabled by default. To start polling from command line run:
wdog0.autoping=1
+**NOTE** Using this feature might have the effect that the watchdog is
+effectively disabled. In case barebox is stuck in a loop that includes feeding
+the watchdog, then the watchdog will never trigger. Only use this feature
+during development or when a bad watchdog design (Short watchdog timeout
+enabled as boot default) doesn't give you another choice.
+
The poller interval is not configurable, but fixed at 500ms and the watchdog
timeout is configured by default to the maximum of the supported values by
hardware. To change the timeout used by the poller, run: