I am on a TX1 and need to access an I2C device during boot. As delivered, U-Boot only knows about 2 buses:
Tegra210 (P2371-2180) # i2c bus
Bus 3: i2c@0,7000c500
Bus 0: i2c@0,7000d000 (active 0)
I need to access the bus at 7000c400. I tried adding this bus to “tegra210-p2371-2180.dts”, rebuilding U-Boot, and re-flashing the Jetson but I still only see bus 3 and bus 0. I also de-compiled the u-boot.dtb that was generated by the build process and verified my changes were in there. I guess modifying the device tree is not the only magic needed. Anyone have any ideas on what else needs to be modified to add an I2C bus?