[tpm2] Resetting TPM Optiga Infineon SLB 9670

[Anthony Arrascue <AArrascue at neuroloop.de>]

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Hello,

I know this question is not directly related to the TSS project, but maybe there is one someone in this community who can help me with this.
I am using a TPM Optiga Infineon SLB 9670 on a Raspberry pi 4 I/O board with a compute module 4.
https://www.infineon.com/dgdl/Infineon-SLB%209670VQ2.0-DataSheet-v01_04-EN.pdf?fileId=5546d4626fc1ce0b016fc78270350cd6

This TPM has a physical reset button. The problem is that I cannot manage to reset the TPM.  No matter how I place the jumper or how long I press the button, the TPM is not resetting.
I believe the reset is not carried out, because when I try to re-provision with tss2_provision I get the message “SRK persistent handle already defined”.
Moreover, if I call “sudo tpm2_getcap handles-persistent” I get the handles which I have already previously occupied (I am assuming here that after a reset they will be emptied).

Has anyone done a physical reset of a TPM?

Thanks for your help.

Anthony Arrascue




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