Re: [PATCH v2] clocksource: timer-tegra186: Enable WDT at probe

[Daniel Lezcano <daniel.lezcano@linaro.org>]

On 07/07/2025 23:19, Jon Hunter wrote:
> 
> On 07/07/2025 10:51, Daniel Lezcano wrote:
>> On Thu, Jul 03, 2025 at 04:34:15PM +0530, Kartik Rajput wrote:
>>> Currently, if the system crashes or hangs during kernel boot before
>>> userspace initializes and configures the watchdog timer, then the
>>> watchdog won’t be able to recover the system as it’s not running. This
>>> becomes crucial during an over-the-air update, where if the newly
>>> updated kernel crashes on boot, the watchdog is needed to reset the
>>> device and boot into an alternative system partition. If the watchdog
>>> is disabled in such scenarios, it can lead to the system getting
>>> bricked.
>>>
>>> Enable the WDT during driver probe to allow recovery from any crash/hang
>>> seen during early kernel boot. Also, disable interrupts once userspace
>>> starts pinging the watchdog.
>>
>> Please resend with proper recipients (linux-watchdog@, Wim Van
>> Sebroeck, Guenter Roeck) and the changelog.
> 
> ACK.
> 
>> Can someone take the opportunity to split this watchdog code and move
>> it in the proper watchdog drivers directory ?
> 
> I understand that this was mentioned before, but Thierry previously 
> objected to this for this particular driver [0].

Yes but meanwhile we found that the auxiliary device is designed for 
this situation.

> [0] https://lore.kernel.org/linux- 
> tegra/4ks74upuufmt2ibh5ur5zpazvfj66ak4gyq7v4rtz2zi2u5wsi@rls64ws3rukp/
> 


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