Hi, Could you check if you could read the BIOS image from FIT (Flash Image Tool) and see Smbus is disabled in the descriptor(in the SoC Straps), which is outside of coreboot BIOS image. enable Smbus in the descriptor if it is disabled, FSP will populate the DIMM in MRC code atleast for BayTrail similar behaviour is observed, not sure on Rangeley Atom
Thanks Ranga -----Original Message----- From: dponamo...@gmail.com <dponamo...@gmail.com> Sent: Wednesday 29 May 2019 15:48 To: coreboot@coreboot.org Subject: [coreboot] How to enable the SMBus0 in coreboot for Intel Atom C2000? 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. _______________________________________________ coreboot mailing list -- coreboot@coreboot.org To unsubscribe send an email to coreboot-le...@coreboot.org _______________________________________________ coreboot mailing list -- coreboot@coreboot.org To unsubscribe send an email to coreboot-le...@coreboot.org
