imx6ul：wakeup times for Deep-Sleep mode

[半醒的狐狸]

hi

when i bootup .

root@imx6ulevk:~# echo mem > /sys/power/state
PM: Syncing filesystems ... done.
PM: Preparing system for mem sleep
Freezing user space processes ... (elapsed 0.007 seconds) done.
Freezing remaining freezable tasks ... (elapsed 0.001 seconds) done.
PM: Entering mem sleep
Suspending console(s) (use no_console_suspend to debug)

wake up by the key。

PM: suspend of devices complete after 709.804 msecs

PM: suspend devices took 0.710 seconds

PM: late suspend of devices complete after 0.961 msecs

PM: noirq suspend of devices complete after 1.051 msecs

Disabling non-boot CPUs ...

Turn off M/F mix!

PM: noirq resume of devices complete after 0.601 msecs

imx-sdma 20ec000.sdma: loaded firmware 3.2

PM: early resume of devices complete after 0.950 msecs

PM: resume of devices complete after 229.608 msecs

PM: resume devices took 0.230 seconds

PM: Finishing wakeup.

BSP：

Linux imx6ulevk 3.14.52-1.1.0_ga+g5f6f0a5 #1 SMP PREEMPT Fri Aug 5 15:54:13 CST 2016 armv7l GNU/Linux

the info show that：

it's spend several hundred milliseconds time to wakeup.

but i wan to wake up less then 50ms.

can i do some thing to achieve this？

if this mode(Deep-Sleep  mode) not apply to fast wake up（less than  50ms）?

thanks!

[igorpadykov]

Hi

Deep-Sleep  mode is described in Table 15. Low Power Mode Current and Power Consumption

i.MX6UL Datasheet

http://cache.freescale.com/files/32bit/doc/data_sheet/IMX6ULCEC.pdf

for speeding up wake up one can try to not change arm voltages and not turn

off plls&clocks, please use Chapter 21 Low-level Power Management (PM) Driver

attached Linux Manual for driver changes.

Best regards

igor

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