Re: [PATCH v4 1/2] soc: qcom: smem: Register gunyah watchdog device

[Pavan Kondeti]

On Tue, Nov 04, 2025 at 10:33:52AM +0530, Pavan Kondeti wrote:
> 
> > I presume if we determine that Gunyah is present, and we haven't put
> > sbsa wdt in place (e.g. during bringup) Gunyah and Gunyah WDT will
> > handle the outcome gracefully...
> > 
> Yes, we are told Gunyah support SMCC based WDT even if it emulates
> SBSA. Most importantly, we have STATUS SMC in gunyah-wdt probe before
> registering the watchdog device.
> 

Thanks Bjorn for asking this question. I have tested this scenario on
Kaanapali. Since the initial platform support patches have added
watchdog device, I don't see gunyah-wdt platform device created. When I
removed the node, I see gunyah-wdt platform device is created and the
driver is probed successfully.

Since this patch checks the device node presence via
of_find_compatible_node(), it does not cover the case where the node is
present but marked as disabled/reserved etc. I think it would be good
to add of_device_is_available() check as well to cover this case.

Thanks,
Pavan