gttwsi_attach_subr
gttwsi_attach_subr(self, bst, bsh, sunxi_twi_regmap);
void gttwsi_attach_subr(device_t, bus_space_tag_t, bus_space_handle_t,
gttwsi_attach_subr(self, mva->mva_iot, ioh, marvell_twsi_regmap);