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| author | Rasmus Villemoes <rasmus.villemoes@prevas.dk> | 2022-09-27 12:54:03 +0300 |
|---|---|---|
| committer | Stefan Roese <sr@denx.de> | 2022-10-24 12:09:19 +0300 |
| commit | 27836705839c4751ac28239ee6fa1f3984e46d4d (patch) | |
| tree | f2d870bb3ac574bf660add626e36fe8b4c1c6b5e /doc/device-tree-bindings | |
| parent | 0ab55cb6f713abeb0b0f0cc1af2d2d16353b5ee0 (diff) | |
| download | u-boot-27836705839c4751ac28239ee6fa1f3984e46d4d.tar.xz | |
watchdog: introduce a u-boot,autostart property
This is a companion to u-boot,noautostart. If one has a single
watchdog device that one does want to have auto-started, but several
others that one doesn't, the only way currently is to set the
CONFIG_WATCHDOG_AUTOSTART and then use the opt-out for the majority.
The main motivation for this is to add an autostarted watchdog device
to the sandbox (to test a fix) without having to set AUTOSTART in
sandbox_defconfig and add the noautostart property to the existing
devices. But it's also nice for symmetry, and the logic in
init_watchdog_dev() becomes simpler to read because we avoid all the
negations.
Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
Diffstat (limited to 'doc/device-tree-bindings')
| -rw-r--r-- | doc/device-tree-bindings/watchdog/common.txt | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/doc/device-tree-bindings/watchdog/common.txt b/doc/device-tree-bindings/watchdog/common.txt index 9db6dd6146..d041fea234 100644 --- a/doc/device-tree-bindings/watchdog/common.txt +++ b/doc/device-tree-bindings/watchdog/common.txt @@ -6,7 +6,8 @@ Optional properties: be used instead. - hw_margin_ms : Period used to reset the watchdog in ms If this period is not defined, the default value is 1000. -- u-boot,noautostart : Specify that this watchdog should not autostart - When the config option WATCHDOG_AUTOSTART is set, all enabled - watchdogs are started. This property allows specifying that this - watchdog should NOT be started. +- u-boot,noautostart : +- u-boot,autostart : These (mutually exclusive) boolean properties can be used to control + whether the watchdog is automatically started when probed. If neither + are present, the behaviour is determined by the config option + WATCHDOG_AUTOSTART. |