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how does CONFIG_PM_AUTOSLEEP work?

Question asked by Xinsi Lin on Feb 3, 2015
Latest reply on Feb 9, 2015 by gusarambula

Hi,

 

I am running Linux3.10.17 on imx6sl evk. I am trying to put imx6sl evk into a low power mode when the system become idle. when configuring the kernel, I enabled the following PM related options-

 

CONFIG_SUSPEND=y

CONFIG_SUSPEND_FREEZER=y

CONFIG_PM_SLEEP=y

CONFIG_PM_SLEEP_SMP=y

CONFIG_PM_AUTOSLEEP=y

 

I understand that Freescale provides unit tests for PM functions by "echo xxxx > /sys/power/state". But I need something working automatically, which I think "CONFIG_PM_AUTOSLEEP=y" sounds like does, but it seems  doing nothing. Do I need extra steps to enable auto-sleep mode on Linux3.10.17?

 

Thanks,

Xinsi Lin


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