This is a code question and I live in the US.

Some background. My house originally had no overhead lights except for the bathrooms, kitchen and hallways. The rest of the rooms had just one switched outlet, usually in the most inconvenient spot to put a floor lamp. The house has two circuits for the non-switched outlets and two circuits for the switched outlets and overhead lights. I've since rewired all the rooms with overhead lights and most of the switched outlets I've converted to non-switched.

Now the code question. Is there any code violations converting a switched outlet on a lighting circuit to a non switched outlet?