Re: [PATCH 1/3] docs: Add support for TPM devices over I2C bus

[Cédric Le Goater]

On 3/24/23 06:11, Ninad Palsule wrote:
> Hello Cedric,
>
> Joel helped me to configure the device and we are able to configure tpm device 
> on ast2600-evb.
>
> I will include this example in the documentation.
>
> # uname -a
> Linux ast2600-evb 6.1.15 #1 SMP Thu Mar 23 20:48:29 CDT 2023 armv7l GNU/Linux
> # cat /etc/os-release
> NAME=Buildroot
> VERSION=2023.02-dirty
> ID=buildroot
> VERSION_ID=2023.02
> PRETTY_NAME="Buildroot 2023.02"
>
> # echo tpm_tis_i2c 0x2e > /sys/bus/i2c/devices/i2c-12/new_device
> [   59.681684] tpm_tis_i2c 12-002e: 2.0 TPM (device-id 0x1, rev-id 1)
> [   59.703190] tpm tpm0: A TPM error (256) occurred attempting the self test
> [   59.705215] tpm tpm0: starting up the TPM manually
> [   59.892917] i2c i2c-12: new_device: Instantiated device tpm_tis_i2c at 0x2e
> # cd /sys/class/tpm/tpm0
> # ls
> dev                pcr-sha256         power              uevent
> device             pcr-sha384         subsystem
> pcr-sha1           pcr-sha512         tpm_version_major


Nice. Did you need any special support in the kernel ?

I could update this image for avocado tests :

  
https://github.com/legoater/qemu-aspeed-boot/tree/master/images/ast2600-evb/buildroot-2023.02

Thanks,

C.