Linux reboot problem watchdog software reset

nikhil_sahu2 — Tue, 01 Dec 2020 10:48:29 GMT

We are working on imx6sx custom board running yocto zeus on that. we are facing the reboot freeze issue sometime when we are doing the soft reboot.

Sometimes board reboot but sometimes it stuck once it called the watchdog.

As a fix, just commenting out the following in arch/arm/boot/dts/imx6sx-sdb.dtsi from the linux kernel

&wdog1 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_wdog>;
// fsl,ext-reset-output;
};

It will make only the software reset. So whenever you reboot, you will have only software components restarting.

if that would be ok? For example, is there a strict requirement for Hardware reset, everytime when a user initiates a system restart.

Should we have to move with this fix?

Thanks,

Nikhil

Re: Linux reboot problem watchdog software reset

jimmychan — Mon, 07 Dec 2020 02:00:01 GMT

I think you can comment out the "ext-reset-output" if you don't use the WDOG_B pin.