[PATCH v2 0/5] I2C framework, reboot Unmatched via PMIC

[Nikita Shubin]

On Fri, 15 Oct 2021 14:56:40 +0100
Jessica Clarke <jrtc27 at jrtc27.com> wrote:

Hello Jessica,

> The chip is common for RTC, power management and watchdog
> functionality. Using it to reboot in this manner is not, as evidenced
> by the fact that Linux does not have a driver for doing so and the
> hardware vendor is unsure of how it’s even working the way it is. I
> hope this driver is never needed for future RISC-V hardware (and I
> don’t quite understand how it ended up being needed for the Unmatched,
> when the Unleashed had a gpio-restart device, though that lacked a
> gpio-poweroff I believe; seems like a very strange oversight).
> 
> Jess
> 

Implementing SBC reset via Watchdog or PMIC is quite a common practice.