If you follow the procedure @Elle Stone outlines here:
https://ninedegreesbelow.com/photography/articles.html#profile-digital-camera
you’ll make a linear gamma profile for your camera that’ll work just fine in a linear workflow.
Indeed, you need the color part of this work for any raw processing, as converting to sRGB or other output profile requires an input color profile that represents the camera’s spectral response. In an ICC profile, the tone part can be effectively nullified by making the tone curve a “gamma 1.0”, which is what the -am parameter in @Elle’s colprof command does.