On Sun, 2018-11-11 at 12:29 -0800, James Bottomley wrote: > On Sun, 2018-11-11 at 21:09 +0100, Michael Niewöhner wrote: > > On Sun, 2018-11-11 at 10:57 -0800, James Bottomley wrote: > > [...] > > > Well, I still think the ACPI setup is incorrect. What's in > > > /sys/class/platform (should be directories of ACPI devices)? The > > > TPM is supposed to show up as MSFT0101. If it doesn't is there any > > > other device string in there that might be a TPM? > > > > Nope. I'm not sure if it should show up in ACPI... isn't TPM 2.0 I2C? > > Your ACPI parser identifies it here: > > > [ 0.003517] ACPI: TPM2 0x000000009E490ED8 000034 (v03 LENOVO TC- > > S06 00001300 AMI 00000000) > > So it has to be a device in the platform directory. What is in this > directory? To find the TPM it probably has something TPM like in the > firmware_node description: > > /sys/devices/platform/<dev>/firmware_node/description > > Mine says > > jejb@jarvis:~/git/linux/drivers> cat > /sys/devices/platform/MSFT0101\:00/firmware_node/description > TPM 2.0 Device > Ah, yep. There is indeed a MSFT0101: (initramfs) cat /sys/devices/platform/MSFT0101\:00/firmware_node/description TPM 2.0 Device (initramfs) cat /sys/devices/platform/MSFT0101\:00/firmware_node/hid MSFT0101 (in itramfs) cat /sys/devices/platform/MSFT0101\:00/firmware_node/path \_SB_.TPM_ (in itramfs) cat /sys/devices/platform/MSFT0101\:00/firmware_node/status 15 (initramf s) cat /sys/devices/platform/MSFT0101\:00/firmware_node/uid 1 > James
