Wrong SMBus drivers enabled. #785
Description
Still fighting to get ONIE to compile from the sources of this site to run on a DELL S4128T. One thing noted in the compiled ONIE is that the TLV header information is not read and attempted installs of OpenSwitch fails. A running of i2cdetect shows the reason why. There is no driver for the SMBus controller. In looking at the kernel patch, the platform-dellemc-s4100-c2338.patch calls 'select I2C_ISCH'. The issue is that this is the i2c controller for the Intel Menlow, not the Intel Rangeley. The Rangeley is covered in I2C_I801 (0x8086, 0x1F3C).
It get worse.
Once the ONIE is modified to bring in the correct SMBus driver, the resulting /dev/i2c devices are reversed from what is expected in kernels 4.9.80 and 4.9.95. The i2c_I801 shows up first at bus 0 instead of bus 1 as the busybox expects, ismt appearing at bus 1. Believe this to be the case also for the more recent DELL S5100 version as well.
Should be noted that the issue with the busybox patch in dellemc_s4100_c2338 still has not been addressed (Compile error on DellEMC S4100). Still need to drop back to the February version to get anything to compile and run.