i.MX8 M MINI soft reset

[sameer_pitre]

Hi,

I am working on i.MX8 M MINI platform. I need some explanation on i.MX M  Soft reset process ? How to invoke csu_reset_b ? 

Secondly, I want to use PMIC_ON_REQ to reset my PMIC. How to invoke it ?

Thanks and regards,
Sameer

[Zhiming_Liu]

Hi

1.The reset command will stop watchdog to trigger soc hardware reboot and pmic will not be closed.You can see 2.11 Watchdog (WDOG) in Reference Manual.

2. The PMIC PF regulator driver in Reference Manual  is based on regulator core driver. It provides the following services for regulator control of the PMIC component:
• Switch ON/OFF all voltage regulators.
• Set the value for all voltage regulators.
• Get the current value for all voltage regulators.

BR 

Zhiming

[sameer_pitre]

Hi Zhiming,

Thanks for your reply. 

1. We have not used the PMIC Watchdog pin as used in EVK for processor reboot. Is there any other option to trigger processor reboot ?

2. Can we use PMIC_ON _REQ signal to turn ON and OFF the PMIC and help processor reboot ?

BR,

Sameer

[Zhiming_Liu · Accepted solution]

Hi

Yes, you can control pmic .Please see the screensot, linux supply api to control pmic regulator.

BR

Zhiming

[sameer_pitre]

Hello Zhiming,

I have one more question. As stated earlier, we have not used PMIC WDI for processor reboot in case of Kernel panic and such issues. Is there any solution to address such issue like use of internal watchdog for reboot ?

Thanks and BR,

Sameer

[Zhiming_Liu]

Hi

unit_test folder in root rootfs has watchdog test sample.

BR

[sameer_pitre]

Hi Zhiming,

Thanks for your support. I think we can go ahead with it. 

BR,

Sameer