Change in coreboot[master]: soc/amd/common/block/i2c: Add support for shared TPM_I2C controller

[Jan Dabros (Code Review)]

Attention is currently required from: Jason Glenesk, Marshall Dawson, Paul Menzel, Karthik Ramasubramanian, Karthikeyan Ramasubramanian, Felix Held.
Hello build bot (Jenkins), Jason Glenesk, Raul Rangel, Marshall Dawson, Karthikeyan Ramasubramanian, Felix Held,

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/c/coreboot/+/61863

to look at the new patch set (#5).

Change subject: soc/amd/common/block/i2c: Add support for shared TPM_I2C controller
......................................................................

soc/amd/common/block/i2c: Add support for shared TPM_I2C controller

There are platforms equipped with AMD SoC where I2C controller connected
to TPM device is shared between X86 and PSP. In order to handle this,
PSP acts as an I2C-arbitrator, where x86 (kernel) sends acquire and
release requests to be accepted by PSP. An example of implementation
within Linux kernel is available [1].

There is a need to introduce new ACPI_ID ("AMDI0019") so that dedicated
driver on OS side can bind to it and handle this special setup. Since
PSP takes care of I2C controller power management, we need to remove
PowerResource object from DSDT.

BUG=b:204508404
BRANCH=guybrush

[1]: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?...

Signed-off-by: Jan Dabros 
Change-Id: Iccfc09d8c580d7ab2acb69d26b9c293cf625fb34
---
M src/soc/amd/cezanne/acpi/mmio.asl
M src/soc/amd/common/block/i2c/Kconfig
2 files changed, 16 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/63/61863/5