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imx6ul linux watchdog issue with qspi

Question asked by Steve Miller on Apr 4, 2016
Latest reply on Apr 5, 2016 by igorpadykov

I'm working on an imx6ul based off the NXP imx6ul-evk.  One difference is the qspi nor is a different device (JEDEC 20bb19 instead of 20ba19).  When the qspi is included and initialized, the watch dog fails to reboot the board during a "shutdown -r now".  Same kernel (slightly different dtb) works find on the imx6ul-evk.

 

I see some comments regarding watchdog and qspi for the imx6sx. 

 

      /*

         * Some i.MX6 boards use WDOG2 to reset external pmic in bypass mode,

         * so do WDOG2 reset here. Do not set SRS, since we will

         * trigger external POR later. Use WDOG1 to reset in ldo-enable

         * mode. You can set it by "fsl,wdog-reset" in dts.

         * For i.MX6SX we have to trigger wdog-reset to reset QSPI-NOR flash to

         * workaround qspi-nor reboot issue whatever ldo-bypass or not.

         */

 

Is there something similar to watch for on the imx6ul?  Here is comment from mxc_restart in "arch/arm/mach-imx/system.c"

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