IMX8MM PMIC_ON_REQ

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IMX8MM PMIC_ON_REQ

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santhosh2
Contributor IV

Is there any way to toggle the  PMIC_ON_REQ using software in IMX8MM

 

Regards

Santhosh

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Yuri
NXP Employee
NXP Employee

@santhosh2 
Hello,

  
  The PMIC_ON_REQ signal can be controlled by the LPCR[TOP] and
LPCR[DP_EN] bits, say, when the 'poweroff' command is issued in Linux.

   For power on only ONOFF pin can be used.

Regards,
Yuri.

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santhosh2
Contributor IV

Hello Yuri,

I have tried this method, But the PMIC_ON_REQ pin toggles only when the switch is pressed as mentioned in the data sheet.

PMIC_ON_REQ.png

Since I want to Control this PMIC_ON_REQ via software to reset the entire PMIC without using the switch, Is there any other way?

Regards

Santhosh

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Yuri
NXP Employee
NXP Employee

@santhosh2 

  Also, LPCR[DP_EN]  should be set.

 

~Yuri.

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santhosh2
Contributor IV

hello yuri,

I tried it is not working for me, Any other things needs to be done

Regards

santhosh

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Yuri
NXP Employee
NXP Employee

@santhosh2 
Hello,

   is Linux command "poweroff" working on Your board?

Regards,
Yuri.

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santhosh2
Contributor IV

Power off command is available, but when poweroff command fired, the system power's off but reboot doesn't happen, Please advice any next step to try?

 

poweroff1.pngpoweroff2.png

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Yuri
NXP Employee
NXP Employee

@santhosh2 
Hello,

   let me know how LPCR[TOP] , LPCR[DP_EN] are written in Your tests.

Regards,
Yuri.

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