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CC3351: power_save with AM62 Linux not disabled?

Joe G.
Mastermind 25786 points
Part Number: CC3351

Tool/software:

Customer does not seem to think the power_save with AM62 Linux is not getting disabled.  They are using the default wic file on the https://www.ti.com/tool/SK-AM62B-P1 from 

https://www.ti.com/tool/download/CC33XX-LINUX-MPU 

Is this feature documented somewhere? How can we test?

Please see customer details below:

I have a minor question on the radio – does it support having power_save mode turned off?   I tried using `iw dev wlan0 set power_save off` and if I read the setting back it says power_save is now off, but looking at a wireless trace I can see the radio is still using power save.  Also it can be seen by observing the ping response times as they produce the usual staircase response time with power save enabled.

 root@am62xx-evm:/usr/share/cc33xx# iw dev wlan0 get power_save

Power save: off 

  • 0
    TI__Mastermind 21970 points

    Hi Joe,

    This command is currently unsupported, however power save is still configurable. See the Calibrator/Power Save sections in the CC33xx Linux SDK documentation for more details. 

  • 0 in reply to Sabeeh Khan1
    TI__Mastermind 25786 points

    Thanks but I only see the conf tool and not Calibrator docs (though I see Calibrator source code) here:

    file:///home/root1/cc33xx/docs/html/CC33XX-linux/CC33conf-tool.html

    Am I looking in the wrong place?

  • 0 in reply to Joe G.
    TI__Mastermind 21970 points

    Hi Joe,

    Here is the correct path for what you're looking for: html/linux/calibrator/calibrator.html#power-save-mode-in-calibrator 

  • 0 in reply to Sabeeh Khan1
    TI__Mastermind 25786 points

    Thanks, though follow up question to make this operation more "run time".  Do we have an SDK roadmap available?

    I can see the psm command documentation in the calibrator tool web page for adjusting power save parameters.    Is there any plan to add support to the driver for the normal user-facing `iw` API for completely disabling power save mode?    The calibrator tool does not seem like a normal day-to-day user-facing way to control power save given the kernel has to be built with a special debug option, then  you have to completely disable the radio, run this tool, then re-enable the radio.  

     

  • 0 in reply to Joe G.
    TI__Mastermind 21970 points

    Hi Joe,

    This is a completely fair request. Unfortunately, I don't have a timeline for this feature to be added, but we are aware of it. However, because of the usefulness of the calibrator tool (not just PSM but other functionality as well), I would recommend that customers integrate this tool. 

    Joe G. said:
    you have to completely disable the radio, run this tool, then re-enable the radio.  

    Btw, I don't think this is true. PSM command should be able to be sent at anytime.