Re: [PATCH] watchdog: bcm7038: Add a restart callback

[Florian Fainelli <florian.fainelli@broadcom.com>]

+CC Justin,

On 10/14/26 15:39, Linus Walleij wrote:
> The watchdog in BCM6846 can reset the system, but bcm7038_wdt
> does not provide a restart callback. Add this.
> 
> The vendor kernel also uses a short watchdog timeout to reset
> this SoC.
> 
> Implement the restart operation by stopping the watchdog, loading the
> minimum count of two ticks and starting it again. A count below two
> does not trigger a reset, as also documented by the U-Boot BCM6345
> watchdog driver.
> 
> Disable local interrupts across the register sequence and
> reset wait  so preemptible uniprocessor MIPS kernels cannot run
> a competing watchdog operation.
> 
> Assisted-by: LLM
> Signed-off-by: Linus Walleij <linusw@kernel.org>

Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com>

We could also implement the .bootstatus callback by reading the WDCR 
register at offset 0x10 and check for bit 0 being set to indicate a 
watchdog reset or not.
-- 
Florian