On Wed, Apr 21, 2021 at 06:26:20PM +0200, Francesco Zanella wrote:
> 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.
You are not supposed to refer to Linux kernel details in devicetree
bindings documents.
Guenter
>
> Example:
> watchdog: watchdog {
> --
> 2.17.1
>
