TDA4VM: UFS0_RSTN pin trigger failed when UFS reboot

Gibbs Shih

Part Number: TDA4VM

Tool/software:

Hi, Dear Expert

This is extension discussion of this thread,

We face UFS reboot failed because of UFS0_RSTN do not active low.

Success Boot, UFS0_RSTN active low

Failed Boot, UFS0_RSTN do not active low

So we try to find toot cause and debugging

I think it should be control by UFS u-boot driver, isn't? (ti-j721e-ufs.c)

How to make sure we already trigger "UFS0_RSTN pin" ?

Which register control this pin in TRM?

Thank You Very Much

Gibbs

0 Tanmay Patil 3 months ago

Hi Gibbs,

Gibbs Shih said:
Which register control this pin in TRM?

The UFS_SS_CTRL register @ 0x04E80004 controls the reset.

Writing 1 to bit 0 should bring the device out of reset.

This is being done in "ti_j721e_ufs_probe" @ line 43-44

Can you make sure that the probe is being run by adding some prints in the probe.

Regards,
Tanmay

0 peitao liu 3 months ago in reply to Tanmay Patil

Hi Tanmay

We have added the relevant logs and confirmed that this was executed when the issue occurred.

liupt

0 Jay Sun 3 months ago in reply to peitao liu

Expert 1095 points

Hi Tanmay

Have any update for this issue: UFS0_RSTN pin trigger failed when take UFS device our of reset.

Jay

0 Gibbs Shih 3 months ago in reply to peitao liu

Hi, Liupt

I found something different, May you check register setting?

This is your post from previous thread, register is 0x04E8 0000

But Tanmay's post is 0x04E8 0004

Thank You.

Gibbs

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