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Standby mode suspend for AM335

Joseph Lee1
Prodigy 160 points

I have used the following command to try to suspend the device and put the system in standby mode.

 echo standby > /sys/power/state

but the above setting does not seems to be working.

How anyone know how to set AM335 into stanby mode? 

Thanks

  • 0
    TI__Mastermind 25235 points

    Hi Joseph,

    What output or error message do you get when you run the above command?

    Would you please paste what output do you get when you run: cat /sys/power/state ?

    You probably need to enable HOTPLUG_CPU in your kernel configuration and rebuild the kernel, but please post the requested information first, in order to be sure.

    config HOTPLUG_CPU
        bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
        depends on SMP && HOTPLUG && EXPERIMENTAL
        help
          Say Y here to experiment with turning CPUs off and on.  CPUs
          can be controlled through /sys/devices/system/cpu.

    Best regards,
    Miroslav
  • 0
    TI__Intellectual 1585 points

    Standby support is a very new feature, in fact it has not yet been fully tested and released in an official SDK.  Our recommendation is to wait until the feature is released in SDK 05.07.00.00, around the end of March.  

    If you would like to experiment with the feature, a preliminary wiki exists: http://processors.wiki.ti.com/index.php/AM335x_Power_Management_Standby_User%27s_Guide. It points you to the kernel source and the updated M3 firmware that would be required.