For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:jejb1:TPM/openSUSE_Tumbleweed/home:jejb1:TPM.repo
zypper refresh
zypper install openssl_tpm2_engine
For openSUSE Leap 42.2 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:jejb1:TPM/openSUSE_Leap_42.2/home:jejb1:TPM.repo
zypper refresh
zypper install openssl_tpm2_engine
For openSUSE Factory PowerPC run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:jejb1:TPM/openSUSE_Factory_PowerPC/home:jejb1:TPM.repo
zypper refresh
zypper install openssl_tpm2_engine