default or selected kernelversion does not have config value CONFIG_I2C_BLACKFIN_TWI_CLK_KHZ.
Result is shown for kernelversion 6.7-rc3
Blackfin TWI I2C clock (kHz)
configname: CONFIG_I2C_BLACKFIN_TWI_CLK_KHZ
Linux Kernel Configuration
└─>Device Drivers
└─>I2C support
└─>I2C Hardware Bus support
└─>Blackfin TWI I2C clock (kHz)
In linux kernel since version 2.6.24 (release Date: 2008-01-24)
The unit of the TWI clock is kHz.