Phoenix TPM Support

Hi,

Some (consumer) Phoenix laptops are showing up on the market that don't have discrete TPMs and are choosing not to enable the AMD security processor firmware TPM (fTPM). In these laptops they offer Pluton, and are relying upon Pluton for TPM functionality. This was introduced in kernel 6.3 with:

4d2732882703 ("tpm_crb: Add support for CRB devices based on Pluton")

I double checked with a backport of this to 6.1.y and at least basic TPM functionality does work properly.

Could this be brought back to 6.1.y so that users with these laptops have TPM working with the LTS kernel?

Thanks,