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author | Wolfram Sang <w.sang@pengutronix.de> | 2011-12-02 00:43:11 +0100 |
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committer | Wim Van Sebroeck <wim@iguana.be> | 2012-01-06 15:26:14 +0100 |
commit | 02861cca4b4f1ceaa7dc805041d84caee580670b (patch) | |
tree | 497521e74d64c1eddd7ab1e141bea9bfd045e0d2 /Documentation/watchdog | |
parent | 9d36bc8cd8d607ec5db98bcc85b27cff9e1b6dfd (diff) | |
download | linux-02861cca4b4f1ceaa7dc805041d84caee580670b.tar.bz2 |
watchdog: documentation: describe nowayout in coversion-guide
nowayout is also handled by the watchdog core. Describe how this needs
to be addressed in the conversion guide.
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Diffstat (limited to 'Documentation/watchdog')
-rw-r--r-- | Documentation/watchdog/convert_drivers_to_kernel_api.txt | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/Documentation/watchdog/convert_drivers_to_kernel_api.txt b/Documentation/watchdog/convert_drivers_to_kernel_api.txt index ae1e90036d06..be8119bb15d2 100644 --- a/Documentation/watchdog/convert_drivers_to_kernel_api.txt +++ b/Documentation/watchdog/convert_drivers_to_kernel_api.txt @@ -163,6 +163,25 @@ Here is a simple example for a watchdog device: +}; +Handle the 'nowayout' feature +----------------------------- + +A few drivers use nowayout statically, i.e. there is no module parameter for it +and only CONFIG_WATCHDOG_NOWAYOUT determines if the feature is going to be +used. This needs to be converted by initializing the status variable of the +watchdog_device like this: + + .status = WATCHDOG_NOWAYOUT_INIT_STATUS, + +Most drivers, however, also allow runtime configuration of nowayout, usually +by adding a module parameter. The conversion for this would be something like: + + watchdog_set_nowayout(&s3c2410_wdd, nowayout); + +The module parameter itself needs to stay, everything else related to nowayout +can go, though. This will likely be some code in open(), close() or write(). + + Register the watchdog device ---------------------------- |