I would like to test all four ADC channels (ADC_D, ADC_C, ADC_B, ADC_A) of the efusA9X module. So far I checked the adc example and the device tree. According to the example the ADC will be handled via device files (/dev/mvf_adc.?). But I could not find these in the sysfs.  and  shows some device tree nodes.  tells me that the ADCs are already in use for some other functions. But  does not create the missing decive files in the sysfs.
What I am missing is a example of a device tree node to inform the kernel about the ADCs. Is there already an example for this or how do I get the device files into the sysfs?