Watchdog imx6

ifzhao — Wed, 05 Apr 2017 08:44:35 GMT

hi, all

Imx6 duallite with BSP 4.3 is used here. Android system is running. But sometime it reboot, and the boot type is watch dog.I 've kept record both of logcat and kmsg. But find nothing, it's so strange.!!

this is setting of watchdog:

<3>[ 14.988727] init: watchdogd:getsupport indent=0x8380
<3>[ 14.993958] init: watchdogd:getstatus flags=0x0
<3>[ 14.998648] init: watchdogd:getbootstatus flags=0x0
<3>[ 15.003757] init: watchdogd:gettimeout = 30
<3>[ 15.008113] init: watchdogd:getpretimeout = 5

if the reboot is caused by watchdog, why there is no exception or kernel crash or any other abnormal printing in kernel and logcat ? If not, what's this shit?

Re: Watchdog imx6

Yuri — Wed, 05 Apr 2017 09:06:13 GMT

Hello,

The watchdog usually provides SOC hardware reset, this does not allow using system interrupts.
Moreover, NXP recommends do not use just SOC reset, but - to implement total system POR instead,

via external circuit.

Have a great day,

Yuri

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Watchdog imx6

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