DRA821U: Documents about reboot in A72 Linux cause main/mcu domain reboot

Ning Li

Part Number: DRA821U
Other Parts Discussed in Thread: DRA821

In A72 Linux, warm reboot will cause the entire chip to restart, including the MCU domain and MAIN domain. Which document describes this?

thanks!

+1 Keerthy J 4 months ago

Hi,

The flow is as below:

A72 Linux Reboot command will gracefully shutdown the drivers, Then the control goes to ATF which eventually calls the below TISCI command:

Best Regards,
Keerthy

0 Ning Li 4 months ago in reply to Keerthy J

Hi Keerthy

1. That is, it calls "system-wide reset" at last for DRA821

2. Can DRA821 enable reset isolation in MCU?

thanks!

0 Keerthy J 4 months ago in reply to Ning Li

Hi,

Are you asking about MCU_ONLY mode? What is the use case need?

The DRA821 SDK does not support MCU_Only mode in the software.

- Keerthy

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