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TPM(4) Device Drivers Manual TPM(4)

tpm
Trusted Platform Module device

tpm* at acpi?

The tpm driver supports devices implementing the TPM Interface Spec 1.2.
Supported devices include:

The tpm driver first appeared in FreeBSD and was added to OpenBSD 6.1.

The tpm driver was initially written by Michael Shalayeff and Hans-Joerg Hoexer.

Functionality is limited to instructing the device to save its state before a system suspend.
August 4, 2016 OpenBSD-current