How to enable LPSR with MCIMX7SABRE EVK board?

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How to enable LPSR with MCIMX7SABRE EVK board?

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wenhann
Contributor I

How to enable LPSR correctly on MCIMX7SABRE???

Power consumption is critical in our product.

>NXP or other standard reference board used

I am use a MCIMX7SABRE EVB.

>Kernel version and/or BSP release used

Testing with official Android image: android_N7.1.2_2.0.0_image_7dsabresd

>Any additional software/application or hardware used

No.

>Hardware or software changes made from standard platform

No.

>Expected and observed behavior

System current should be low after enter supend.

system active--> power supply is about 340mA 5V

system suspend--> power supply is about 270mA 5V.

Expected suspend current should below 10mA.

>Steps to reproduce

Boot into system.

Run below command from UART and USB is not connect.

echo mem > /sys/power/state

Try to apply below thread patch to modify imx7d-sdb.dts

Suspend current is drop to 173mA 5V but cannot resume (it looks like crash and system didn't have any response.)

How to Resume from LPSR mode on imx7D sabre 

>Frequency of reproducibility (always, usually, sometimes)

Always.

>Display type and resolution (for video/graphic/display issues

No display.

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igorpadykov
NXP TechSupport
NXP TechSupport

Hi Wenhann

for obtaining additional linux patches one can create service request

How to submit a new question for NXP Support 

Best regards
igor
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wenhann
Contributor I

Hi igor

I am new to here.

So the LPSR patch is ready for MCIMX7SABRE EVK.

But I must to create a service request to obtain the patch, am I correct?

Thanks.

Wenhann

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