default or selected kernelversion does not have config value CONFIG_AD9951.
Result is shown for kernelversion 6.5.1
Analog Devices ad9951 driver
modulename: ad9951.ko
configname: CONFIG_AD9951
Linux Kernel Configuration
└─>Device Drivers
└─>Staging drivers
└─>IIO staging drivers
└─>Direct Digital Synthesis
└─>SPI support
└─>Analog Devices ad9951 driver
In linux kernel since version 2.6.38 (release Date: 2011-03-14)
Say yes here to build support for Analog Devices DDS chip
ad9951, provides direct access via sysfs.
ad9951, provides direct access via sysfs.