[U-Boot] Issue enabling TPM 2.0 on RPI

[Elena Unix]

Hello Miquèl,

> Miquel Raynal <miquel.raynal at bootlin.com> wrote on Mon, 17 Jun 2019 10:44:52 +0200 :
> 
> Hello,
> 
> Miquel Raynal <miquel.raynal at bootlin.com> wrote on Mon, 17 Jun 2019
> 10:44:52 +0200:
> 
>> Hi Elena,
>> 
>> Elena Unix <elenaunix01 at gmail.com> wrote on Fri, 14 Jun 2019 09:43:46
>> +0200:
>> 
>>> Hello,
>>> 
>>> I am trying to enable the TPM 2.0 SLB9670 in U-Boot for a Raspberry Pi 3 B+. More precisely, the TPM is on an add-on board, the IRIDIUM SLB9670.
> 
> Please also mind the voltage levels on the Iridium board which might be
> different with the Raspberry Pi's.
> 
> Also try the latest U-Boot, with this patch applied [1]. If it solves
> your issue, please send a Tested-by on the ML!
> 
> [1] https://patchwork.ozlabs.org/patch/1100655/
> 
> Thanks,
> Miquèl

I checked the voltage levels, they seem compatible. I also tried the patch with no luck. 

Thank you very much for your support,
Elena