CONFIG_ETRAX_RS485 is not available for thedefaultarchitecture x86.
Result is shown for architecture cris
default or selected kernelversion does not have config value CONFIG_ETRAX_RS485.
Result is shown for kernelversion 6.7-rc3
RS-485 support
configname: CONFIG_ETRAX_RS485
Linux Kernel Configuration
└─>RS-485 support
In linux kernel since version 2.6.12
Enables support for RS-485 serial communication.