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iMX6Q hangs while entering Suspend state

Question asked by Selvakumar Velandi on Jul 5, 2016
Latest reply on Jul 22, 2016 by Selvakumar Velandi

Hi,

 

We have a iMX6Q customized board running 3.14.28 FSL Linux kernel.  I am trying to put the system in LPM mode. through following steps.

 

echo enabled > /sys/bus/platform/drivers/imx-uart/2020000.serial/tty/ttymxc0/power/wakeup

echo standby > /sys/power/state

 

The kernel is compiled with CONFIG_SUSPEND option.

Most of the time the iMX6Q hang in  during disabling not boot CPU and then watchdog reset happens.

[  182.529533] Disabling non-boot CPUs ...

 

Very rarely iMX6Q enters suspend mode. In this case, wakeup also not happening. Only power recycle is required to bring up the board.

Let me know any addition patch or configuration required for suspend/wakeup for linux kernel 3.14.28

 

Regards,

Selvakumar V

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