applesmc_write_key
applesmc_write_key(MOTION_SENSOR_KEY, buffer, 2);
applesmc_write_key(BACKLIGHT_KEY, backlight_state, 2);
ret = applesmc_write_key(newkey, buffer, 2);
ret = applesmc_write_key(FANS_MANUAL, buffer, 2);
applesmc_write_key(BACKLIGHT_KEY, backlight_state, 2);