Power management Power consumption : ARM Core off

[cader]

Dear Freescale Support Team,

We are working on the Power management Module on i.MX6Q Based SabreSDP Platform with B5 Revision and the Processor Revision is 1.2(i.e AC)

We would like to know about the ARM Power off sequence in i.MX6q and any one has the procedure to Enter in to the ARM Power off state please share.

And i would like to know any other module dependency with ARM Power off . What is the power consumption will reduce if ARM Power off performed in the SabreSDP Platform.

Any other documentation for suspend and resume what is the exact procedure. How to make sure ARM is in Power OFF mode.

Best Regards,

Cader.

[Yuri · Accepted solution]

As for power consumption please use the next app notes :

http://cache.freescale.com/files/32bit/doc/app_note/AN4509.pdf

http://cache.freescale.com/files/32bit/doc/app_note/AN4576.pdf

The mentioned app notes relate to Linux BSP :

https://www.freescale.com/webapp/Download?colCode=L3.0.35_1.1.0_SOURCE&appType=license&location=null

https://www.freescale.com/webapp/Download?colCode=L3.0.35_3.0.0_ER_SOURCE&appType=license&location=n...

Please use Linux documentation for information about source files, responsible

for power saving modes.

https://www.freescale.com/webapp/Download?colCode=L3.0.35_1.1.0_LINUXDOCS_BUNDLE&location=null

In particular, please look at  Chapter 16 "Low-level Power Management (PM) Driver"

of "Linux_6DQ_RM_L3.0.35_1.1.0.pdf".

Also the SDK contains examples. 

Please look at Chapter 24 (Configuring the Power Modes) of "iMX6_Firmware_Guide.pdf".

https://www.freescale.com/webapp/Download?colCode=i.MX6_PLATFORM_SDK&location=null

[Oceanblue]

Hi Yuri,

      Could you please explain a little detail about Power off sequence? we have met the same problem, and expect to port it on ourselves power management circuit. thanks

JK W

[Yuri]

Please look at section 5 (Use case configuration and usage guidelines) of app note AN4576 (i.MX 6DualLite Power Consumption Measurement), in particular, for Deep-Sleep mode :

echo mem > /sys/power/state