ENERGY_UNIT_SCALE
rd->energy_unit = ENERGY_UNIT_SCALE * 1000000 / (1 << value);
do_div(val, ENERGY_UNIT_SCALE * 1000000);
scale = ENERGY_UNIT_SCALE;
rd->energy_unit = ENERGY_UNIT_SCALE * 1000000 / (1 << value);
rd->energy_unit = ENERGY_UNIT_SCALE * 1 << value;