IMC is found on certain Xeon processors. On such platforms SPDs are not
connected to SMBus on PCH but to dedicated IMC-owned pins. The purpose
of this driver is to expose access to the i2c/smbus controller associated
with IMC.
Datasheet used: Intel Xeon Processor D-1500 Product Family, Volume 2,
reference 332051-001
This driver is largely based on i2c-imc.c Linux driver.
https://lwn.net/Articles/685475/
TEST=single/double reads and single writes on Xeon-D1500.
Hardware: Open Compute Project Monolake platform.
Signed-off-by: Andrey Petrov <anpetrov@fb.com>
Change-Id: Idbcda1c2273b9a5721fcd9470b4de182192779e7
Reviewed-on: https://review.coreboot.org/c/coreboot/+/34678
Reviewed-by: David Hendricks <david.hendricks@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
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