i.MX ProcessorsのトピックRe: imx6d wdog1 reboot not stable

imx6d wdog1 reboot not stable

jiujinhong — Mon, 11 Dec 2017 07:04:11 GMT

Hi,

once my board finished boot, it will automatically enter into powersave mode(396Mhz, code disable suspend feature). if reboot by wdog1, it will hang. If use performance scaling_governor, it can reboot successfully and Uboot reboot cause is WDOG. But system will auto reboot(POR reboot) once boot completed. the hardware hasn't no any plan to use WDOG_B.

Re: imx6d wdog1 reboot not stable

Yuri — Mon, 11 Dec 2017 07:20:29 GMT

Hello,

It is highly recommended to remove power (voltage source) to all components on the board in the
event of a processor reset. This avoids having to determine if a component critical to rebooting the
processor is in the necessary state to support a reboot. So, the POR may be recommended for reboot.

Have a great day,
Yuri

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Re: imx6d wdog1 reboot not stable

jiujinhong — Tue, 12 Dec 2017 09:34:14 GMT

Hi Yuri,

wdog1 can successfully reboot in new hardware board, but it hang in u-boot "flash target is mmc" each time reboot. when i try to increase ARM-SOC/VDD voltage in power init func, doesn't make sense. if reset from u-boot(WDOG reset), can not produce this issue.

can you give some good advice?

Re: imx6d wdog1 reboot not stable

jiujinhong — Tue, 12 Dec 2017 09:35:45 GMT

if append additional "flash taget is mmc" after the first log, u-boot will print as below:

In:    serial
Out:   serial
Err:   serial
flash target is MMC:2
fl

Re: imx6d wdog1 reboot not stable

Yuri — Fri, 15 Dec 2017 02:56:30 GMT

Hello,

Is total Power ON Reset generated by the wdog1 (using external circuit) ?

Regards,

Yuri.

Re: imx6d wdog1 reboot not stable

jiujinhong — Fri, 15 Dec 2017 03:17:03 GMT

Hi yuri,

no. but linux3.0.35 can boot/restart successfully, i need to figure out what's difference.

If print more log in u-boot, u-boot will hang after linux wdog1 reboot.

Re: imx6d wdog1 reboot not stable

Yuri — Fri, 15 Dec 2017 03:20:30 GMT

Hello,

You may create request / ticket to get more details why it is highly recommended to remove power

(voltage source) to all components on the board in the event of a processor reset.

Support|NXP

Regards,

Yuri.

Re: imx6d wdog1 reboot not stable

jiujinhong — Fri, 15 Dec 2017 03:53:24 GMT

thanks.

Re: imx6d wdog1 reboot not stable

Yuri — Fri, 15 Dec 2017 04:03:02 GMT

I've sent the document.