There is motherboard based on the Intel Rangeley Atom C2000 (C2758) series
processor. How to enable the SMBus0 in coreboot? If I use OEM BIOS or BIOS from
Intel (EDVLCRB1.86B.0048.R00.1508181657_MPK) for mohon peak crb, then I see on
the SMBus0 (i2c-1 in Fedora 28) memory DIMM spd (0x50 & 0x52), clock generator
(0x69) and other devices. If I use a coreboot based bios for the Mohon peak
platform - I do not see any devices on i2c-1. I see an data exchange on the
SMBus0 with oscilloscope at boot time only. When I send "i2cdetect -y 1"
command in Linux no activity on SMBus0 and no device found.
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