On 12/30/25 14:34, Krzysztof Kozlowski wrote:

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On Mon, Dec 29, 2025 at 04:50:00PM +0200, Nandor Han wrote:

quoted

Property "fsl,wdt-continue-in-low-power" allows the watchdog to continue
running in low power modes (STOP and DOZE). By default, the watchdog is
suspended in these modes. This property provides the option to keep the
watchdog active during low power states when needed.

And why exactly would that be a DT property? If system is sleeping
(assuming this is what you meant by low power), no one will pet the dog,
thus watchdog makes no sense.

Thanks for the feedback Krzysztof and Guenter.

In our case, low-power mode is disabled. However, we have identified that under certain conditions,
specifically during simulated high-load scenarios, the device becomes unresponsive because it enters
one of these power states.

Otherwise I fail to see how this is a hardware property and we do not
accept SW properties (see writing bindings, numerous presentations).

Our system is based on the i.MX7D CPU and the watchdog peripheral supports the configuration:

(From i.MX 7Dual Applications Processor Reference Manual, Rev. 1, 01/2018, page: 1174)
---
WDZST
Watchdog Low Power. Determines the operation of the WDOG during low-power modes. This bit is write
once-only.
---
Given that our system does not support low-power modes, we intend to enable the watchdog across all power
states to ensure the device can recover properly under these conditions.

Regards,
Nandor