Re: [PATCH v2] watchdog: sunxi_wdt: preserve boot-enabled watchdog

[Guenter Roeck]

On Thu, Aug 27, 2026 at 10:42:31PM -0600, James Hilliard wrote:
> sunxi_wdt_probe() unconditionally stops the watchdog even when firmware
> left it running. This opens an unprotected interval during boot and
> prevents CONFIG_WATCHDOG_HANDLE_BOOT_ENABLED from taking over the active
> watchdog.
> 
> Detect an enabled watchdog and decode its programmed interval. Preserve
> representable timeouts, and round the 0.5-second interval up to the
> minimum representable one-second timeout. Use the configured timeout for
> reserved interval encodings. Set the Linux reset mode and ping the
> watchdog without clearing its enable bit, then mark it hardware-running
> before registration so the watchdog core services it until userspace
> takes control. Leave disabled watchdogs untouched.
> 
> Fixes: d00680ed0026 ("watchdog: sunxi: New watchdog driver for Allwinner A10/A13")
> Cc: stable@xxxxxxxxxxxxxxx
> Signed-off-by: James Hilliard <james.hilliard1@xxxxxxxxx>

Applied.

Thanks,
Guenter