> Yes, as "struct oa_tc6" and its members are not or going to be accessed > in the MAC driver, I will consider this as an opaque structure and > declare it as void *opaque_oa_tc6 in the MAC driver private structure > "struct lan865x_priv" and will pass to the APIs exported from oa_tc6.c lib. > > Is my understanding correct? Yes. If the structure is going to be truly opaque, i suggest having it in the C file, not the H file. Andrew