topic Re: Watchdog on imx in i.MX Processors

Watchdog on imx

matt67 — Fri, 18 Oct 2019 08:30:53 GMT

Hello,

What do you think of using the imx internal watchdog timer with fsl,ext-reset-output dts property to output reset signal to PMIC ?

Is it safe enough, and guaranteed that the Low frequency reference clock feeding the WDOG block doesn't stop in case of hanging ?

Or perhaps should I use an hardware reset handler ?

Re: Watchdog on imx

igorpadykov — Fri, 18 Oct 2019 09:54:31 GMT

Hi matt67

yes using internal watchdog to reset pmic is fine solution and it is safe.

Best regards
igor
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Re: Watchdog on imx

matt67 — Fri, 18 Oct 2019 11:51:13 GMT

HI Igor,

It is safe also in u-boot ? Is it possible in u-boot to use the GPIO outpout from the watchdog ?

Re: Watchdog on imx

igorpadykov — Fri, 18 Oct 2019 13:16:42 GMT

Hi matt67

yes it is safe also in u-boot.

Best regards
igor