Intel GM45 TPM device iTPM INTC0102
INTC0102 Intel TPM device found in GM45 chipset is supposed to comply with TCG TPM 1.2 specifications, and thus be taken care of by tpm_tis kernel module. Unfortunately, it does not. After loading this module
modprobe tpm_tis interrupts=0 force=1
and mounting securityfs
mount -t securityfs none /sys/kernel/security
it is possible to read the files
but no further communication with the TPM device seems to be possible.
Note, however, that tpm_tis has to be compiled as a module and unloaded before suspend-to-disk, or it would freeze on wake-up. Suspend-to-ram seems to be OK, moreover if you unload tpm_tis before suspend-to-ram and modprobe in after resume -- then trousers daemon will refuse to restart. To get trousers run again, you have to either reboot or suspend-to-disk/wake-up.
As of kernel 18.104.22.168, INTC0102 Intel TPM device is supported by the vanilla kernel. The only caveat is that the module tpm_tis has to be loaded with options
modprobe tpm_tis interrupts=0 force=1 itpm=1
To make it happen automatically, you can create a file /etc/modprobe.d/tpm.conf containing
options tpm_tis interrupts=0 force=1 itpm=1