AM5718: low singnal on PORZ can't restart the linux in am5718 plat

Hello Jiabin,

Please allow us some time to look into your issue. 

Meanwhile, could you elaborate on what happens, is this an isolated event of does it happen every time?

Could you also elaborate on what you mean by this sentence:

jiabin liu said:

After the system was running normally

Does this mean that Linux is up and running?

Best,

Josue

Could you also check what silicon revision you are using?

AM5718AABCXA

Thank you ,Josue Zamitiz-Ayala 

What I mean is：When powered off, it can start and run normally. After normal operation, add the PORZ pin a low level of approximately 300ms, but the system crashed and did not restart u boot and start Linux.

It is not an isolated event and has never been able to start by pulling down the PORZ.

Hello Jiabin,

Could you share details on how the PORz pin was implemented?

Was your design based on a TI board?

-Josue

Also, are there any logs after the reset pin is set to low? Does the board just die? what do you do to bring it back up?

-Josue

Thank you ,Josue Zamitiz-Ayala 

Josue Zamitiz-Ayala said:

Could you share details on how the PORz pin was implemented?

Was your design based on a TI board?

and When I press the reset button, there is no printout, the board crashes, and I need to power off and restart to work again。

Josue Zamitiz-Ayala said:

Also, are there any logs after the reset pin is set to low? Does the board just die? what do you do to bring it back up?

When PORz is asserted, RSTOUTn should also be asserted.  Once PORz is de-asserted, RSTOUTn should also be de-asserted.  Can you verify?

What are you booting from (QSPI, SD Card, eMMC, etc)?

How are the SYSCONFIG signals controlled, and are they used for other functions after booting?

Do you have JTAG capability (able to connect debugger/emulator and read processor registers)?

Robert Eschler，

Thank you for your reply.

I am currently booting from an SD card.

The SYSCONFIG signal will be used as a GPMC part pin after startup.

My board does not have JTAG function.

“When PORz is asserted, RSTOUTn should also be asserted Once PORz is de asserted, RSTOUTn should also be de asserted ”Is this a combination timing at startup? Are there any other signals in this timing sequence?

RSTOUTn is an output of the processor and can be used to verify the processor is exiting the reset sequence.

SYSCONFIG (boot mode) is latched at the release of PORz.  On initial power up, everything works fine.  Is it possible after initial boot, the GPMC peripheral is driving GPMC bus and thus affecting SYSCONFIG latching when pressing the reset button?  If you had JTAG access, you could read the register that latches SYSCONFIG value.

Hello Jabin,

Could you please elaborate on what the SYSCONFIG signal is being used for? what is GPMC connected to?

Could you please answer Robert's questions above?

-Josue

Josue Zamitiz-Ayala,

Thank you for your reply.

I  need to communicate with the team members, please wait some time.