[Bug 283877] Trusted Platform Module driver fails to initialize firmware TPM

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=283877

            Bug ID: 283877
           Summary: Trusted Platform Module driver fails to initialize
                    firmware TPM
           Product: Base System
           Version: 14.1-RELEASE
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: kern
          Assignee: bugs@FreeBSD.org
          Reporter: vbasiccd@msn.com

Opening a new bug as suggested in Bug 193578, since this TPM problem still
persists.

The TPM driver fails to load on two of my computers: an HP Z440 and a Dell
Latitude E7450.  The HP has a firmware TPM 2.0 and the Dell has TPM 1.2.  I am
not sure if the Dell's TPM is firmware or hardware, yet additional exploration
suggests that it is firmware as well.


HP Z440:

FreeBSD 14.1-RELEASE-p5

(/dev/tpm0 does not appear)

tpm0: <Trusted Platform Module> iomem 0xfed40000-0xfed44fff on acpi0
tpm: device 0x001a15d1 rev 0x10
WARNING: Device "tpm" is Giant locked and may be deleted before FreeBSD 15.0.

Specs:
Intel(R) Xeon(R) CPU E5-2640 v4 @ 2.40GHz
Microarchitecture:   Broadwell
Technology:          14nm
Cores:               10 cores (20 threads)
AVX:                 AVX,AVX2
FMA:                 FMA3
L1i Size:            32KB (320KB Total)
L1d Size:            32KB (320KB Total)
L2 Size:             256KB (2.5MB Total)
L3 Size:             25MB



Dell Latitude E7450:

FreeBSD 14.1-RELEASE-p6

(neither /dev/tpm nor /dev/tpm0 appears)

tpm2: <Trusted Platform Module> on acpi0
device_attach: tpm2 attach returned 6
tpm2: <Trusted Platform Module> on acpi0
device_attach: tpm2 attach returned 6
tpm2: <Trusted Platform Module> on acpi0
device_attach: tpm2 attach returned 6
tpm2: <Trusted Platform Module> on acpi0
device_attach: tpm2 attach returned 6

Specs:
Intel(R) Core(TM) i5-5300U CPU @ 2.30GHz
Microarchitecture:   Broadwell
Technology:          14nm
Cores:               2 cores (4 threads)
AVX:                 AVX,AVX2
FMA:                 FMA3
L1i Size:            32KB (64KB Total)
L1d Size:            32KB (64KB Total)
L2 Size:             256KB (512KB Total)
L3 Size:             3MB

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