Documentation for new device tree property "start-at-boot".
Signed-off-by: Francesco Zanella <francesco.zanella@xxxxxxxxx>
---
Documentation/devicetree/bindings/watchdog/gpio-wdt.txt | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/Documentation/devicetree/bindings/watchdog/gpio-wdt.txt b/Documentation/devicetree/bindings/watchdog/gpio-wdt.txt
index 198794963786..cdaf7f0602e8 100644
--- a/Documentation/devicetree/bindings/watchdog/gpio-wdt.txt
+++ b/Documentation/devicetree/bindings/watchdog/gpio-wdt.txt
@@ -17,6 +17,13 @@ Optional Properties:
- always-running: If the watchdog timer cannot be disabled, add this flag to
have the driver keep toggling the signal without a client. It will only cease
to toggle the signal when the device is open and the timeout elapsed.
+- start-at-boot: Start pinging hw watchdog at probe, in order to take advantage
+ of kernel configs:
+ - WATCHDOG_HANDLE_BOOT_ENABLED: Avoid possible reboot if hw watchdog was been
+ enabled before the kernel (by uboot for example) and userspace doesn't take
+ control of /dev/watchdog in time;
+ - WATCHDOG_OPEN_TIMEOUT: Reboot if userspace doesn't take control of
+ /dev/watchdog within the timeout.
Example:
watchdog: watchdog {
--
2.17.1
